GtkWidget

GtkWidget — Base class for all widgets

Functions

#define GTK_WIDGET_TYPE()
#define GTK_WIDGET_STATE()
#define GTK_WIDGET_SAVED_STATE()
#define GTK_WIDGET_FLAGS()
#define GTK_WIDGET_TOPLEVEL()
#define GTK_WIDGET_NO_WINDOW()
#define GTK_WIDGET_REALIZED()
#define GTK_WIDGET_MAPPED()
#define GTK_WIDGET_VISIBLE()
#define GTK_WIDGET_DRAWABLE()
#define GTK_WIDGET_SENSITIVE()
#define GTK_WIDGET_PARENT_SENSITIVE()
#define GTK_WIDGET_IS_SENSITIVE()
#define GTK_WIDGET_CAN_FOCUS()
#define GTK_WIDGET_HAS_FOCUS()
#define GTK_WIDGET_CAN_DEFAULT()
#define GTK_WIDGET_RECEIVES_DEFAULT()
#define GTK_WIDGET_HAS_DEFAULT()
#define GTK_WIDGET_HAS_GRAB()
#define GTK_WIDGET_RC_STYLE()
#define GTK_WIDGET_COMPOSITE_CHILD()
#define GTK_WIDGET_APP_PAINTABLE()
#define GTK_WIDGET_DOUBLE_BUFFERED()
#define GTK_WIDGET_SET_FLAGS()
#define GTK_WIDGET_UNSET_FLAGS()
void (*GtkCallback) ()
GtkWidget * gtk_widget_new ()
GtkWidget * gtk_widget_ref ()
void gtk_widget_unref ()
void gtk_widget_destroy ()
void gtk_widget_destroyed ()
void gtk_widget_set ()
void gtk_widget_unparent ()
void gtk_widget_show ()
void gtk_widget_show_now ()
void gtk_widget_hide ()
void gtk_widget_show_all ()
void gtk_widget_hide_all ()
void gtk_widget_map ()
void gtk_widget_unmap ()
void gtk_widget_realize ()
void gtk_widget_unrealize ()
void gtk_widget_queue_draw ()
void gtk_widget_queue_resize ()
void gtk_widget_queue_resize_no_redraw ()
void gtk_widget_draw ()
void gtk_widget_size_request ()
void gtk_widget_get_child_requisition ()
void gtk_widget_size_allocate ()
void gtk_widget_add_accelerator ()
gboolean gtk_widget_remove_accelerator ()
void gtk_widget_set_accel_path ()
GList * gtk_widget_list_accel_closures ()
gboolean gtk_widget_can_activate_accel ()
gboolean gtk_widget_event ()
gboolean gtk_widget_activate ()
void gtk_widget_reparent ()
gboolean gtk_widget_intersect ()
gboolean gtk_widget_is_focus ()
void gtk_widget_grab_focus ()
void gtk_widget_grab_default ()
void gtk_widget_set_name ()
const gchar * gtk_widget_get_name ()
void gtk_widget_set_state ()
void gtk_widget_set_sensitive ()
void gtk_widget_set_parent ()
void gtk_widget_set_parent_window ()
GdkWindow * gtk_widget_get_parent_window ()
void gtk_widget_set_uposition ()
void gtk_widget_set_usize ()
void gtk_widget_set_events ()
void gtk_widget_add_events ()
void gtk_widget_set_extension_events ()
GdkExtensionMode gtk_widget_get_extension_events ()
GtkWidget * gtk_widget_get_toplevel ()
GtkWidget * gtk_widget_get_ancestor ()
GdkColormap * gtk_widget_get_colormap ()
void gtk_widget_set_colormap ()
GdkVisual * gtk_widget_get_visual ()
gint gtk_widget_get_events ()
void gtk_widget_get_pointer ()
gboolean gtk_widget_is_ancestor ()
gboolean gtk_widget_translate_coordinates ()
gboolean gtk_widget_hide_on_delete ()
void gtk_widget_set_style ()
#define gtk_widget_set_rc_style()
void gtk_widget_ensure_style ()
GtkStyle * gtk_widget_get_style ()
#define gtk_widget_restore_default_style()
void gtk_widget_reset_rc_styles ()
void gtk_widget_push_colormap ()
void gtk_widget_pop_colormap ()
void gtk_widget_set_default_colormap ()
GtkStyle * gtk_widget_get_default_style ()
GdkColormap * gtk_widget_get_default_colormap ()
GdkVisual * gtk_widget_get_default_visual ()
void gtk_widget_set_direction ()
GtkTextDirection gtk_widget_get_direction ()
void gtk_widget_set_default_direction ()
GtkTextDirection gtk_widget_get_default_direction ()
void gtk_widget_shape_combine_mask ()
void gtk_widget_input_shape_combine_mask ()
void gtk_widget_path ()
void gtk_widget_class_path ()
gchar * gtk_widget_get_composite_name ()
void gtk_widget_modify_style ()
GtkRcStyle * gtk_widget_get_modifier_style ()
void gtk_widget_modify_fg ()
void gtk_widget_modify_bg ()
void gtk_widget_modify_text ()
void gtk_widget_modify_base ()
void gtk_widget_modify_font ()
void gtk_widget_modify_cursor ()
PangoContext * gtk_widget_create_pango_context ()
PangoContext * gtk_widget_get_pango_context ()
PangoLayout * gtk_widget_create_pango_layout ()
GdkPixbuf * gtk_widget_render_icon ()
void gtk_widget_pop_composite_child ()
void gtk_widget_push_composite_child ()
void gtk_widget_queue_clear ()
void gtk_widget_queue_clear_area ()
void gtk_widget_queue_draw_area ()
void gtk_widget_reset_shapes ()
void gtk_widget_set_app_paintable ()
void gtk_widget_set_double_buffered ()
void gtk_widget_set_redraw_on_allocate ()
void gtk_widget_set_composite_name ()
gboolean gtk_widget_set_scroll_adjustments ()
gboolean gtk_widget_mnemonic_activate ()
void gtk_widget_class_install_style_property ()
void gtk_widget_class_install_style_property_parser ()
GParamSpec * gtk_widget_class_find_style_property ()
GParamSpec ** gtk_widget_class_list_style_properties ()
GdkRegion * gtk_widget_region_intersect ()
gint gtk_widget_send_expose ()
gboolean gtk_widget_send_focus_change ()
void gtk_widget_style_get ()
void gtk_widget_style_get_property ()
void gtk_widget_style_get_valist ()
void gtk_widget_style_attach ()
AtkObject * gtk_widget_get_accessible ()
gboolean gtk_widget_child_focus ()
void gtk_widget_child_notify ()
void gtk_widget_freeze_child_notify ()
gboolean gtk_widget_get_child_visible ()
GtkWidget * gtk_widget_get_parent ()
GtkSettings * gtk_widget_get_settings ()
GtkClipboard * gtk_widget_get_clipboard ()
GdkDisplay * gtk_widget_get_display ()
GdkWindow * gtk_widget_get_root_window ()
GdkScreen * gtk_widget_get_screen ()
gboolean gtk_widget_has_screen ()
void gtk_widget_get_size_request ()
#define gtk_widget_pop_visual
#define gtk_widget_push_visual()
void gtk_widget_set_child_visible ()
#define gtk_widget_set_default_visual()
void gtk_widget_set_size_request ()
#define gtk_widget_set_visual()
void gtk_widget_thaw_child_notify ()
void gtk_widget_set_no_show_all ()
gboolean gtk_widget_get_no_show_all ()
GList * gtk_widget_list_mnemonic_labels ()
void gtk_widget_add_mnemonic_label ()
void gtk_widget_remove_mnemonic_label ()
GtkAction * gtk_widget_get_action ()
gboolean gtk_widget_is_composited ()
void gtk_widget_error_bell ()
gboolean gtk_widget_keynav_failed ()
gchar * gtk_widget_get_tooltip_markup ()
void gtk_widget_set_tooltip_markup ()
gchar * gtk_widget_get_tooltip_text ()
void gtk_widget_set_tooltip_text ()
GtkWindow * gtk_widget_get_tooltip_window ()
void gtk_widget_set_tooltip_window ()
gboolean gtk_widget_get_has_tooltip ()
void gtk_widget_set_has_tooltip ()
void gtk_widget_trigger_tooltip_query ()
GdkPixmap * gtk_widget_get_snapshot ()
GdkWindow * gtk_widget_get_window ()
void gtk_widget_get_allocation ()
void gtk_widget_set_allocation ()
gboolean gtk_widget_get_app_paintable ()
gboolean gtk_widget_get_can_default ()
void gtk_widget_set_can_default ()
gboolean gtk_widget_get_can_focus ()
void gtk_widget_set_can_focus ()
gboolean gtk_widget_get_double_buffered ()
gboolean gtk_widget_get_has_window ()
void gtk_widget_set_has_window ()
gboolean gtk_widget_get_sensitive ()
gboolean gtk_widget_is_sensitive ()
GtkStateType gtk_widget_get_state ()
gboolean gtk_widget_get_visible ()
void gtk_widget_set_visible ()
gboolean gtk_widget_has_default ()
gboolean gtk_widget_has_focus ()
gboolean gtk_widget_has_grab ()
gboolean gtk_widget_has_rc_style ()
gboolean gtk_widget_is_drawable ()
gboolean gtk_widget_is_toplevel ()
void gtk_widget_set_window ()
void gtk_widget_set_receives_default ()
gboolean gtk_widget_get_receives_default ()
void gtk_widget_set_realized ()
gboolean gtk_widget_get_realized ()
void gtk_widget_set_mapped ()
gboolean gtk_widget_get_mapped ()
void gtk_widget_get_requisition ()
GtkRequisition * gtk_requisition_copy ()
void gtk_requisition_free ()

Properties

gboolean app-paintable Read / Write
gboolean can-default Read / Write
gboolean can-focus Read / Write
gboolean composite-child Read
gboolean double-buffered Read / Write
GdkEventMask events Read / Write
GdkExtensionMode extension-events Read / Write
gboolean has-default Read / Write
gboolean has-focus Read / Write
gboolean has-tooltip Read / Write
gint height-request Read / Write
gboolean is-focus Read / Write
gchar * name Read / Write
gboolean no-show-all Read / Write
GtkContainer * parent Read / Write
gboolean receives-default Read / Write
gboolean sensitive Read / Write
GtkStyle * style Read / Write
gchar * tooltip-markup Read / Write
gchar * tooltip-text Read / Write
gboolean visible Read / Write
gint width-request Read / Write
GdkWindow * window Read

Signals

void accel-closures-changed  
gboolean button-press-event Run Last
gboolean button-release-event Run Last
gboolean can-activate-accel Run Last
void child-notify No Hooks
gboolean client-event Run Last
void composited-changed Action
gboolean configure-event Run Last
gboolean damage-event Run Last
gboolean delete-event Run Last
gboolean destroy-event Run Last
void direction-changed Run First
void drag-begin Run Last
void drag-data-delete Run Last
void drag-data-get Run Last
void drag-data-received Run Last
gboolean drag-drop Run Last
void drag-end Run Last
gboolean drag-failed Run Last
void drag-leave Run Last
gboolean drag-motion Run Last
gboolean enter-notify-event Run Last
gboolean event Run Last
void event-after  
gboolean expose-event Run Last
gboolean focus Run Last
gboolean focus-in-event Run Last
gboolean focus-out-event Run Last
gboolean grab-broken-event Run Last
void grab-focus Action
void grab-notify Run First
void hide Run First
void hierarchy-changed Run Last
gboolean key-press-event Run Last
gboolean key-release-event Run Last
gboolean keynav-failed Run Last
gboolean leave-notify-event Run Last
void map Run First
gboolean map-event Run Last
gboolean mnemonic-activate Run Last
gboolean motion-notify-event Run Last
void move-focus Action
gboolean no-expose-event Run Last
void parent-set Run First
gboolean popup-menu Action
gboolean property-notify-event Run Last
gboolean proximity-in-event Run Last
gboolean proximity-out-event Run Last
gboolean query-tooltip Run Last
void realize Run First
void screen-changed Run Last
gboolean scroll-event Run Last
gboolean selection-clear-event Run Last
void selection-get Run Last
gboolean selection-notify-event Run Last
void selection-received Run Last
gboolean selection-request-event Run Last
void show Run First
gboolean show-help Action
void size-allocate Run First
void size-request Run First
void state-changed Run First
void style-set Run First
void unmap Run First
gboolean unmap-event Run Last
void unrealize Run Last
gboolean visibility-notify-event Run Last
gboolean window-state-event Run Last

Object Hierarchy

    GBoxed
    ├── GtkRequisition
    ╰── GtkSelectionData
    GObject
    ╰── GInitiallyUnowned
        ╰── GtkObject
            ╰── GtkWidget
                ├── GtkContainer
                ├── GtkMisc
                ├── GtkCalendar
                ├── GtkCellView
                ├── GtkDrawingArea
                ├── GtkEntry
                ├── GtkRuler
                ├── GtkRange
                ├── GtkSeparator
                ├── GtkHSV
                ├── GtkInvisible
                ├── GtkOldEditable
                ├── GtkPreview
                ╰── GtkProgress

Known Derived Interfaces

GtkWidget is required by GtkCellEditable, GtkFileChooser and GtkToolShell.

Implemented Interfaces

GtkWidget implements AtkImplementorIface and GtkBuildable.

Includes

#include <gtk/gtk.h>

Description

GtkWidget is the base class all widgets in GTK+ derive from. It manages the widget lifecycle, states and style.

GtkWidget introduces style properties - these are basically object properties that are stored not on the object, but in the style object associated to the widget. Style properties are set in resource files. This mechanism is used for configuring such things as the location of the scrollbar arrows through the theme, giving theme authors more control over the look of applications without the need to write a theme engine in C.

Use gtk_widget_class_install_style_property() to install style properties for a widget class, gtk_widget_class_find_style_property() or gtk_widget_class_list_style_properties() to get information about existing style properties and gtk_widget_style_get_property(), gtk_widget_style_get() or gtk_widget_style_get_valist() to obtain the value of a style property.


GtkWidget as GtkBuildable

The GtkWidget implementation of the GtkBuildable interface supports a custom <accelerator> element, which has attributes named key, modifiers and signal and allows to specify accelerators.

Example 14. A UI definition fragment specifying an accelerator

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<object class="GtkButton">
  <accelerator key="q" modifiers="GDK_CONTROL_MASK" signal="clicked"/>
</object>


In addition to accelerators, GtkWidget also support a custom <accessible> element, which supports actions and relations. Properties on the accessible implementation of an object can be set by accessing the internal child "accessible" of a GtkWidget.

Example 15. A UI definition fragment specifying an accessible

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<object class="GtkButton" id="label1"/>
  <property name="label">I am a Label for a Button</property>
</object>
<object class="GtkButton" id="button1">
  <accessibility>
    <action action_name="click" translatable="yes">Click the button.</action>
    <relation target="label1" type="labelled-by"/>
  </accessibility>
  <child internal-child="accessible">
    <object class="AtkObject" id="a11y-button1">
      <property name="AtkObject::name">Clickable Button</property>
    </object>
  </child>
</object>


Functions

GTK_WIDGET_TYPE()

#define GTK_WIDGET_TYPE(wid)		  (GTK_OBJECT_TYPE (wid))

GTK_WIDGET_TYPE has been deprecated since version 2.20 and should not be used in newly-written code.

Use G_OBJECT_TYPE() instead.

Gets the type of a widget.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_STATE()

#define GTK_WIDGET_STATE(wid)		  (GTK_WIDGET (wid)->state)

GTK_WIDGET_STATE has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_get_state() instead.

Returns the current state of the widget, as a GtkStateType.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_SAVED_STATE()

#define GTK_WIDGET_SAVED_STATE(wid)	  (GTK_WIDGET (wid)->saved_state)

GTK_WIDGET_SAVED_STATE has been deprecated since version 2.20 and should not be used in newly-written code.

Do not used it.

Returns the saved state of the widget, as a GtkStateType.

The saved state will be restored when a widget gets sensitive again, after it has been made insensitive with gtk_widget_set_state() or gtk_widget_set_sensitive().

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_FLAGS()

#define GTK_WIDGET_FLAGS(wid)		  (GTK_OBJECT_FLAGS (wid))

Returns the widget flags from wid .

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_TOPLEVEL()

#define GTK_WIDGET_TOPLEVEL(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_TOPLEVEL) != 0)

GTK_WIDGET_TOPLEVEL has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_is_toplevel() instead.

Evaluates to TRUE if the widget is a toplevel widget.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_NO_WINDOW()

#define GTK_WIDGET_NO_WINDOW(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_NO_WINDOW) != 0)

GTK_WIDGET_NO_WINDOW has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_get_has_window() instead.

Evaluates to TRUE if the widget doesn't have an own GdkWindow.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_REALIZED()

#define GTK_WIDGET_REALIZED(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_REALIZED) != 0)

GTK_WIDGET_REALIZED has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_get_realized() instead.

Evaluates to TRUE if the widget is realized.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_MAPPED()

#define GTK_WIDGET_MAPPED(wid)		  ((GTK_WIDGET_FLAGS (wid) & GTK_MAPPED) != 0)

GTK_WIDGET_MAPPED has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_get_mapped() instead.

Evaluates to TRUE if the widget is mapped.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_VISIBLE()

#define GTK_WIDGET_VISIBLE(wid)		  ((GTK_WIDGET_FLAGS (wid) & GTK_VISIBLE) != 0)

GTK_WIDGET_VISIBLE has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_get_visible() instead.

Evaluates to TRUE if the widget is visible.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_DRAWABLE()

#define GTK_WIDGET_DRAWABLE(wid)	  (GTK_WIDGET_VISIBLE (wid) && GTK_WIDGET_MAPPED (wid))

GTK_WIDGET_DRAWABLE has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_is_drawable() instead.

Evaluates to TRUE if the widget is mapped and visible.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_SENSITIVE()

#define GTK_WIDGET_SENSITIVE(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_SENSITIVE) != 0)

GTK_WIDGET_SENSITIVE has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_get_sensitive() instead.

Evaluates to TRUE if the GTK_SENSITIVE flag has be set on the widget.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_PARENT_SENSITIVE()

#define GTK_WIDGET_PARENT_SENSITIVE(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_PARENT_SENSITIVE) != 0)

GTK_WIDGET_PARENT_SENSITIVE has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_get_sensitive() on the parent widget instead.

Evaluates to TRUE if the GTK_PARENT_SENSITIVE flag has be set on the widget.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_IS_SENSITIVE()

#define             GTK_WIDGET_IS_SENSITIVE(wid)

GTK_WIDGET_IS_SENSITIVE has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_is_sensitive() instead.

Evaluates to TRUE if the widget is effectively sensitive.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_CAN_FOCUS()

#define GTK_WIDGET_CAN_FOCUS(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_FOCUS) != 0)

GTK_WIDGET_CAN_FOCUS has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_get_can_focus() instead.

Evaluates to TRUE if the widget is able to handle focus grabs.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_HAS_FOCUS()

#define GTK_WIDGET_HAS_FOCUS(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_FOCUS) != 0)

GTK_WIDGET_HAS_FOCUS has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_has_focus() instead.

Evaluates to TRUE if the widget has grabbed the focus and no other widget has done so more recently.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_CAN_DEFAULT()

#define GTK_WIDGET_CAN_DEFAULT(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_DEFAULT) != 0)

GTK_WIDGET_CAN_DEFAULT has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_get_can_default() instead.

Evaluates to TRUE if the widget is allowed to receive the default action via gtk_widget_grab_default().

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_RECEIVES_DEFAULT()

#define GTK_WIDGET_RECEIVES_DEFAULT(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_RECEIVES_DEFAULT) != 0)

GTK_WIDGET_RECEIVES_DEFAULT has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_get_receives_default() instead.

Evaluates to TRUE if the widget when focused will receive the default action even if there is a different widget set as default.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_HAS_DEFAULT()

#define GTK_WIDGET_HAS_DEFAULT(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_DEFAULT) != 0)

GTK_WIDGET_HAS_DEFAULT has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_has_default() instead.

Evaluates to TRUE if the widget currently is receiving the default action.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_HAS_GRAB()

#define GTK_WIDGET_HAS_GRAB(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_GRAB) != 0)

GTK_WIDGET_HAS_GRAB has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_has_grab() instead.

Evaluates to TRUE if the widget is in the grab_widgets stack, and will be the preferred one for receiving events other than ones of cosmetic value.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_RC_STYLE()

#define GTK_WIDGET_RC_STYLE(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_RC_STYLE) != 0)

GTK_WIDGET_RC_STYLE has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_has_rc_style() instead.

Evaluates to TRUE if the widget's style has been looked up through the rc mechanism.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_COMPOSITE_CHILD()

#define GTK_WIDGET_COMPOSITE_CHILD(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_COMPOSITE_CHILD) != 0)

GTK_WIDGET_COMPOSITE_CHILD has been deprecated since version 2.20 and should not be used in newly-written code.

Use the “composite-child” property instead.

Evaluates to TRUE if the widget is a composite child of its parent.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_APP_PAINTABLE()

#define GTK_WIDGET_APP_PAINTABLE(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_APP_PAINTABLE) != 0)

GTK_WIDGET_APP_PAINTABLE has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_get_app_paintable() instead.

Evaluates to TRUE if the GTK_APP_PAINTABLE flag has been set on the widget.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_DOUBLE_BUFFERED()

#define GTK_WIDGET_DOUBLE_BUFFERED(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_DOUBLE_BUFFERED) != 0)

GTK_WIDGET_DOUBLE_BUFFERED has been deprecated since version 2.20 and should not be used in newly-written code.

Use gtk_widget_get_double_buffered() instead.

Evaluates to TRUE if the GTK_DOUBLE_BUFFERED flag has been set on the widget.

Parameters

wid

a GtkWidget.

 

GTK_WIDGET_SET_FLAGS()

#define GTK_WIDGET_SET_FLAGS(wid,flag)	  G_STMT_START{ (GTK_WIDGET_FLAGS (wid) |= (flag)); }G_STMT_END

Turns on certain widget flags.

Parameters

wid

a GtkWidget.

 

flag

the flags to set.

 

GTK_WIDGET_UNSET_FLAGS()

#define GTK_WIDGET_UNSET_FLAGS(wid,flag)  G_STMT_START{ (GTK_WIDGET_FLAGS (wid) &= ~(flag)); }G_STMT_END

GTK_WIDGET_UNSET_FLAGS has been deprecated since version 2.22 and should not be used in newly-written code.

Use the proper function instead. See GTK_WIDGET_SET_FLAGS().

Turns off certain widget flags.

Parameters

wid

a GtkWidget.

 

flag

the flags to unset.

 

GtkCallback ()

void
(*GtkCallback) (GtkWidget *widget,
                gpointer data);

The type of the callback functions used for e.g. iterating over the children of a container, see gtk_container_foreach().

Parameters

widget

the widget to operate on

 

data

user-supplied data

 

gtk_widget_new ()

GtkWidget *
gtk_widget_new (GType type,
                const gchar *first_property_name,
                ...);

This is a convenience function for creating a widget and setting its properties in one go. For example you might write: gtk_widget_new (GTK_TYPE_LABEL, "label", "Hello World", "xalign", 0.0, NULL) to create a left-aligned label. Equivalent to g_object_new(), but returns a widget so you don't have to cast the object yourself.

Parameters

type

type ID of the widget to create

 

first_property_name

name of first property to set

 

Varargs

value of first property, followed by more properties, NULL-terminated

 

Returns

a new GtkWidget of type widget_type


gtk_widget_ref ()

GtkWidget *
gtk_widget_ref (GtkWidget *widget);

gtk_widget_ref has been deprecated since version 2.12 and should not be used in newly-written code.

Use g_object_ref() instead.

Adds a reference to a widget. This function is exactly the same as calling g_object_ref(), and exists mostly for historical reasons. It can still be convenient to avoid casting a widget to a GObject, it saves a small amount of typing.

Parameters

widget

a GtkWidget

 

Returns

the widget that was referenced


gtk_widget_unref ()

void
gtk_widget_unref (GtkWidget *widget);

gtk_widget_unref has been deprecated since version 2.12 and should not be used in newly-written code.

Use g_object_unref() instead.

Inverse of gtk_widget_ref(). Equivalent to g_object_unref().

Parameters

widget

a GtkWidget

 

gtk_widget_destroy ()

void
gtk_widget_destroy (GtkWidget *widget);

Destroys a widget. Equivalent to gtk_object_destroy(), except that you don't have to cast the widget to GtkObject. When a widget is destroyed, it will break any references it holds to other objects. If the widget is inside a container, the widget will be removed from the container. If the widget is a toplevel (derived from GtkWindow), it will be removed from the list of toplevels, and the reference GTK+ holds to it will be removed. Removing a widget from its container or the list of toplevels results in the widget being finalized, unless you've added additional references to the widget with g_object_ref().

In most cases, only toplevel widgets (windows) require explicit destruction, because when you destroy a toplevel its children will be destroyed as well.

Parameters

widget

a GtkWidget

 

gtk_widget_destroyed ()

void
gtk_widget_destroyed (GtkWidget *widget,
                      GtkWidget **widget_pointer);

This function sets *widget_pointer to NULL if widget_pointer != NULL. It's intended to be used as a callback connected to the "destroy" signal of a widget. You connect gtk_widget_destroyed() as a signal handler, and pass the address of your widget variable as user data. Then when the widget is destroyed, the variable will be set to NULL. Useful for example to avoid multiple copies of the same dialog.

Parameters

widget

a GtkWidget

 

widget_pointer

address of a variable that contains widget .

[inout][transfer none]

gtk_widget_set ()

void
gtk_widget_set (GtkWidget *widget,
                const gchar *first_property_name,
                ...);

gtk_widget_set has been deprecated since version 2.0 and should not be used in newly-written code.

Use g_object_set() instead.

Precursor of g_object_set().

Parameters

widget

a GtkWidget

 

first_property_name

name of first property to set

 

Varargs

value of first property, followed by more properties, NULL-terminated

 

gtk_widget_unparent ()

void
gtk_widget_unparent (GtkWidget *widget);

This function is only for use in widget implementations. Should be called by implementations of the remove method on GtkContainer, to dissociate a child from the container.

Parameters

widget

a GtkWidget

 

gtk_widget_show ()

void
gtk_widget_show (GtkWidget *widget);

Flags a widget to be displayed. Any widget that isn't shown will not appear on the screen. If you want to show all the widgets in a container, it's easier to call gtk_widget_show_all() on the container, instead of individually showing the widgets.

Remember that you have to show the containers containing a widget, in addition to the widget itself, before it will appear onscreen.

When a toplevel container is shown, it is immediately realized and mapped; other shown widgets are realized and mapped when their toplevel container is realized and mapped.

Parameters

widget

a GtkWidget

 

gtk_widget_show_now ()

void
gtk_widget_show_now (GtkWidget *widget);

Shows a widget. If the widget is an unmapped toplevel widget (i.e. a GtkWindow that has not yet been shown), enter the main loop and wait for the window to actually be mapped. Be careful; because the main loop is running, anything can happen during this function.

Parameters

widget

a GtkWidget

 

gtk_widget_hide ()

void
gtk_widget_hide (GtkWidget *widget);

Reverses the effects of gtk_widget_show(), causing the widget to be hidden (invisible to the user).

Parameters

widget

a GtkWidget

 

gtk_widget_show_all ()

void
gtk_widget_show_all (GtkWidget *widget);

Recursively shows a widget, and any child widgets (if the widget is a container).

Parameters

widget

a GtkWidget

 

gtk_widget_hide_all ()

void
gtk_widget_hide_all (GtkWidget *widget);

gtk_widget_hide_all has been deprecated since version 2.24 and should not be used in newly-written code.

Use gtk_widget_hide() instead.

Recursively hides a widget and any child widgets.

Parameters

widget

a GtkWidget

 

gtk_widget_map ()

void
gtk_widget_map (GtkWidget *widget);

This function is only for use in widget implementations. Causes a widget to be mapped if it isn't already.

Parameters

widget

a GtkWidget

 

gtk_widget_unmap ()

void
gtk_widget_unmap (GtkWidget *widget);

This function is only for use in widget implementations. Causes a widget to be unmapped if it's currently mapped.

Parameters

widget

a GtkWidget

 

gtk_widget_realize ()

void
gtk_widget_realize (GtkWidget *widget);

Creates the GDK (windowing system) resources associated with a widget. For example, widget->window will be created when a widget is realized. Normally realization happens implicitly; if you show a widget and all its parent containers, then the widget will be realized and mapped automatically.

Realizing a widget requires all the widget's parent widgets to be realized; calling gtk_widget_realize() realizes the widget's parents in addition to widget itself. If a widget is not yet inside a toplevel window when you realize it, bad things will happen.

This function is primarily used in widget implementations, and isn't very useful otherwise. Many times when you think you might need it, a better approach is to connect to a signal that will be called after the widget is realized automatically, such as GtkWidget::expose-event. Or simply g_signal_connect() to the GtkWidget::realize signal.

Parameters

widget

a GtkWidget

 

gtk_widget_unrealize ()

void
gtk_widget_unrealize (GtkWidget *widget);

This function is only useful in widget implementations. Causes a widget to be unrealized (frees all GDK resources associated with the widget, such as widget->window ).

Parameters

widget

a GtkWidget

 

gtk_widget_queue_draw ()

void
gtk_widget_queue_draw (GtkWidget *widget);

Equivalent to calling gtk_widget_queue_draw_area() for the entire area of a widget.

Parameters

widget

a GtkWidget

 

gtk_widget_queue_resize ()

void
gtk_widget_queue_resize (GtkWidget *widget);

gtk_widget_queue_resize is deprecated and should not be used in newly-written code.

This function is only for use in widget implementations. Flags a widget to have its size renegotiated; should be called when a widget for some reason has a new size request. For example, when you change the text in a GtkLabel, GtkLabel queues a resize to ensure there's enough space for the new text.

Parameters

widget

a GtkWidget

 

gtk_widget_queue_resize_no_redraw ()

void
gtk_widget_queue_resize_no_redraw (GtkWidget *widget);

This function works like gtk_widget_queue_resize(), except that the widget is not invalidated.

Parameters

widget

a GtkWidget

 

Since: 2.4


gtk_widget_draw ()

void
gtk_widget_draw (GtkWidget *widget,
                 const GdkRectangle *area);

gtk_widget_draw is deprecated and should not be used in newly-written code.

In GTK+ 1.2, this function would immediately render the region area of a widget, by invoking the virtual draw method of a widget. In GTK+ 2.0, the draw method is gone, and instead gtk_widget_draw() simply invalidates the specified region of the widget, then updates the invalid region of the widget immediately. Usually you don't want to update the region immediately for performance reasons, so in general gtk_widget_queue_draw_area() is a better choice if you want to draw a region of a widget.

Parameters

widget

a GtkWidget

 

area

area to draw

 

gtk_widget_size_request ()

void
gtk_widget_size_request (GtkWidget *widget,
                         GtkRequisition *requisition);

gtk_widget_size_request is deprecated and should not be used in newly-written code.

This function is typically used when implementing a GtkContainer subclass. Obtains the preferred size of a widget. The container uses this information to arrange its child widgets and decide what size allocations to give them with gtk_widget_size_allocate().

You can also call this function from an application, with some caveats. Most notably, getting a size request requires the widget to be associated with a screen, because font information may be needed. Multihead-aware applications should keep this in mind.

Also remember that the size request is not necessarily the size a widget will actually be allocated.

See also gtk_widget_get_child_requisition().

Parameters

widget

a GtkWidget

 

requisition

a GtkRequisition to be filled in

 

gtk_widget_get_child_requisition ()

void
gtk_widget_get_child_requisition (GtkWidget *widget,
                                  GtkRequisition *requisition);

This function is only for use in widget implementations. Obtains widget->requisition , unless someone has forced a particular geometry on the widget (e.g. with gtk_widget_set_size_request()), in which case it returns that geometry instead of the widget's requisition.

This function differs from gtk_widget_size_request() in that it retrieves the last size request value from widget->requisition , while gtk_widget_size_request() actually calls the "size_request" method on widget to compute the size request and fill in widget->requisition , and only then returns widget->requisition .

Because this function does not call the "size_request" method, it can only be used when you know that widget->requisition is up-to-date, that is, gtk_widget_size_request() has been called since the last time a resize was queued. In general, only container implementations have this information; applications should use gtk_widget_size_request().

Parameters

widget

a GtkWidget

 

requisition

a GtkRequisition to be filled in

 

gtk_widget_size_allocate ()

void
gtk_widget_size_allocate (GtkWidget *widget,
                          GtkAllocation *allocation);

This function is only used by GtkContainer subclasses, to assign a size and position to their child widgets.

Parameters

widget

a GtkWidget

 

allocation

position and size to be allocated to widget

 

gtk_widget_add_accelerator ()

void
gtk_widget_add_accelerator (GtkWidget *widget,
                            const gchar *accel_signal,
                            GtkAccelGroup *accel_group,
                            guint accel_key,
                            GdkModifierType accel_mods,
                            GtkAccelFlags accel_flags);

Installs an accelerator for this widget in accel_group that causes accel_signal to be emitted if the accelerator is activated. The accel_group needs to be added to the widget's toplevel via gtk_window_add_accel_group(), and the signal must be of type G_RUN_ACTION. Accelerators added through this function are not user changeable during runtime. If you want to support accelerators that can be changed by the user, use gtk_accel_map_add_entry() and gtk_widget_set_accel_path() or gtk_menu_item_set_accel_path() instead.

Parameters

widget

widget to install an accelerator on

 

accel_signal

widget signal to emit on accelerator activation

 

accel_group

accel group for this widget, added to its toplevel

 

accel_key

GDK keyval of the accelerator

 

accel_mods

modifier key combination of the accelerator

 

accel_flags

flag accelerators, e.g. GTK_ACCEL_VISIBLE

 

gtk_widget_remove_accelerator ()

gboolean
gtk_widget_remove_accelerator (GtkWidget *widget,
                               GtkAccelGroup *accel_group,
                               guint accel_key,
                               GdkModifierType accel_mods);

Removes an accelerator from widget , previously installed with gtk_widget_add_accelerator().

Parameters

widget

widget to install an accelerator on

 

accel_group

accel group for this widget

 

accel_key

GDK keyval of the accelerator

 

accel_mods

modifier key combination of the accelerator

 

returns

whether an accelerator was installed and could be removed

 

gtk_widget_set_accel_path ()

void
gtk_widget_set_accel_path (GtkWidget *widget,
                           const gchar *accel_path,
                           GtkAccelGroup *accel_group);

Given an accelerator group, accel_group , and an accelerator path, accel_path , sets up an accelerator in accel_group so whenever the key binding that is defined for accel_path is pressed, widget will be activated. This removes any accelerators (for any accelerator group) installed by previous calls to gtk_widget_set_accel_path(). Associating accelerators with paths allows them to be modified by the user and the modifications to be saved for future use. (See gtk_accel_map_save().)

This function is a low level function that would most likely be used by a menu creation system like GtkUIManager. If you use GtkUIManager, setting up accelerator paths will be done automatically.

Even when you you aren't using GtkUIManager, if you only want to set up accelerators on menu items gtk_menu_item_set_accel_path() provides a somewhat more convenient interface.

Note that accel_path string will be stored in a GQuark. Therefore, if you pass a static string, you can save some memory by interning it first with g_intern_static_string().

Parameters

widget

a GtkWidget

 

accel_path

path used to look up the accelerator.

[allow-none]

accel_group

a GtkAccelGroup.

[allow-none]

gtk_widget_list_accel_closures ()

GList *
gtk_widget_list_accel_closures (GtkWidget *widget);

Lists the closures used by widget for accelerator group connections with gtk_accel_group_connect_by_path() or gtk_accel_group_connect(). The closures can be used to monitor accelerator changes on widget , by connecting to the GtkAccelGroup ::accel-changed signal of the GtkAccelGroup of a closure which can be found out with gtk_accel_group_from_accel_closure().

Parameters

widget

widget to list accelerator closures for

 

Returns

a newly allocated GList of closures.

[transfer container][element-type GClosure]


gtk_widget_can_activate_accel ()

gboolean
gtk_widget_can_activate_accel (GtkWidget *widget,
                               guint signal_id);

Determines whether an accelerator that activates the signal identified by signal_id can currently be activated. This is done by emitting the “can-activate-accel” signal on widget ; if the signal isn't overridden by a handler or in a derived widget, then the default check is that the widget must be sensitive, and the widget and all its ancestors mapped.

Parameters

widget

a GtkWidget

 

signal_id

the ID of a signal installed on widget

 

Returns

TRUE if the accelerator can be activated.

Since: 2.4


gtk_widget_event ()

gboolean
gtk_widget_event (GtkWidget *widget,
                  GdkEvent *event);

Rarely-used function. This function is used to emit the event signals on a widget (those signals should never be emitted without using this function to do so). If you want to synthesize an event though, don't use this function; instead, use gtk_main_do_event() so the event will behave as if it were in the event queue. Don't synthesize expose events; instead, use gdk_window_invalidate_rect() to invalidate a region of the window.

Parameters

widget

a GtkWidget

 

event

a GdkEvent

 

Returns

return from the event signal emission (TRUE if the event was handled)


gtk_widget_activate ()

gboolean
gtk_widget_activate (GtkWidget *widget);

For widgets that can be "activated" (buttons, menu items, etc.) this function activates them. Activation is what happens when you press Enter on a widget during key navigation. If widget isn't activatable, the function returns FALSE.

Parameters

widget

a GtkWidget that's activatable

 

Returns

TRUE if the widget was activatable


gtk_widget_reparent ()

void
gtk_widget_reparent (GtkWidget *widget,
                     GtkWidget *new_parent);

Moves a widget from one GtkContainer to another, handling reference count issues to avoid destroying the widget.

Parameters

widget

a GtkWidget

 

new_parent

a GtkContainer to move the widget into

 

gtk_widget_intersect ()

gboolean
gtk_widget_intersect (GtkWidget *widget,
                      const GdkRectangle *area,
                      GdkRectangle *intersection);

Computes the intersection of a widget 's area and area , storing the intersection in intersection , and returns TRUE if there was an intersection. intersection may be NULL if you're only interested in whether there was an intersection.

Parameters

widget

a GtkWidget

 

area

a rectangle

 

intersection

rectangle to store intersection of widget and area

 

Returns

TRUE if there was an intersection


gtk_widget_is_focus ()

gboolean
gtk_widget_is_focus (GtkWidget *widget);

Determines if the widget is the focus widget within its toplevel. (This does not mean that the HAS_FOCUS flag is necessarily set; HAS_FOCUS will only be set if the toplevel widget additionally has the global input focus.)

Parameters

widget

a GtkWidget

 

Returns

TRUE if the widget is the focus widget.


gtk_widget_grab_focus ()

void
gtk_widget_grab_focus (GtkWidget *widget);

Causes widget to have the keyboard focus for the GtkWindow it's inside. widget must be a focusable widget, such as a GtkEntry; something like GtkFrame won't work.

More precisely, it must have the GTK_CAN_FOCUS flag set. Use gtk_widget_set_can_focus() to modify that flag.

The widget also needs to be realized and mapped. This is indicated by the related signals. Grabbing the focus immediately after creating the widget will likely fail and cause critical warnings.

Parameters

widget

a GtkWidget

 

gtk_widget_grab_default ()

void
gtk_widget_grab_default (GtkWidget *widget);

Causes widget to become the default widget. widget must have the GTK_CAN_DEFAULT flag set; typically you have to set this flag yourself by calling gtk_widget_set_can_default (widget , TRUE). The default widget is activated when the user presses Enter in a window. Default widgets must be activatable, that is, gtk_widget_activate() should affect them.

Parameters

widget

a GtkWidget

 

gtk_widget_set_name ()

void
gtk_widget_set_name (GtkWidget *widget,
                     const gchar *name);

Widgets can be named, which allows you to refer to them from a gtkrc file. You can apply a style to widgets with a particular name in the gtkrc file. See the documentation for gtkrc files (on the same page as the docs for GtkRcStyle).

Note that widget names are separated by periods in paths (see gtk_widget_path()), so names with embedded periods may cause confusion.

Parameters

widget

a GtkWidget

 

name

name for the widget

 

gtk_widget_get_name ()

const gchar *
gtk_widget_get_name (GtkWidget *widget);

Retrieves the name of a widget. See gtk_widget_set_name() for the significance of widget names.

Parameters

widget

a GtkWidget

 

Returns

name of the widget. This string is owned by GTK+ and should not be modified or freed


gtk_widget_set_state ()

void
gtk_widget_set_state (GtkWidget *widget,
                      GtkStateType state);

This function is for use in widget implementations. Sets the state of a widget (insensitive, prelighted, etc.) Usually you should set the state using wrapper functions such as gtk_widget_set_sensitive().

Parameters

widget

a GtkWidget

 

state

new state for widget

 

gtk_widget_set_sensitive ()

void
gtk_widget_set_sensitive (GtkWidget *widget,
                          gboolean sensitive);

Sets the sensitivity of a widget. A widget is sensitive if the user can interact with it. Insensitive widgets are "grayed out" and the user can't interact with them. Insensitive widgets are known as "inactive", "disabled", or "ghosted" in some other toolkits.

Parameters

widget

a GtkWidget

 

sensitive

TRUE to make the widget sensitive

 

gtk_widget_set_parent ()

void
gtk_widget_set_parent (GtkWidget *widget,
                       GtkWidget *parent);

This function is useful only when implementing subclasses of GtkContainer. Sets the container as the parent of widget , and takes care of some details such as updating the state and style of the child to reflect its new location. The opposite function is gtk_widget_unparent().

Parameters

widget

a GtkWidget

 

parent

parent container

 

gtk_widget_set_parent_window ()

void
gtk_widget_set_parent_window (GtkWidget *widget,
                              GdkWindow *parent_window);

Sets a non default parent window for widget .

Parameters

widget

a GtkWidget.

 

parent_window

the new parent window.

 

gtk_widget_get_parent_window ()

GdkWindow *
gtk_widget_get_parent_window (GtkWidget *widget);

Gets widget 's parent window.

Parameters

widget

a GtkWidget.

 

Returns

the parent window of widget .

[transfer none]


gtk_widget_set_uposition ()

void
gtk_widget_set_uposition (GtkWidget *widget,
                          gint x,
                          gint y);

gtk_widget_set_uposition is deprecated and should not be used in newly-written code.

Sets the position of a widget. The funny "u" in the name comes from the "user position" hint specified by the X Window System, and exists for legacy reasons. This function doesn't work if a widget is inside a container; it's only really useful on GtkWindow.

Don't use this function to center dialogs over the main application window; most window managers will do the centering on your behalf if you call gtk_window_set_transient_for(), and it's really not possible to get the centering to work correctly in all cases from application code. But if you insist, use gtk_window_set_position() to set GTK_WIN_POS_CENTER_ON_PARENT, don't do the centering manually.

Note that although x and y can be individually unset, the position is not honoured unless both x and y are set.

Parameters

widget

a GtkWidget

 

x

x position; -1 to unset x; -2 to leave x unchanged

 

y

y position; -1 to unset y; -2 to leave y unchanged

 

gtk_widget_set_usize ()

void
gtk_widget_set_usize (GtkWidget *widget,
                      gint width,
                      gint height);

gtk_widget_set_usize has been deprecated since version 2.2 and should not be used in newly-written code.

Use gtk_widget_set_size_request() instead.

Sets the minimum size of a widget; that is, the widget's size request will be width by height . You can use this function to force a widget to be either larger or smaller than it is. The strange "usize" name dates from the early days of GTK+, and derives from X Window System terminology. In many cases, gtk_window_set_default_size() is a better choice for toplevel windows than this function; setting the default size will still allow users to shrink the window. Setting the usize will force them to leave the window at least as large as the usize. When dealing with window sizes, gtk_window_set_geometry_hints() can be a useful function as well.

Note the inherent danger of setting any fixed size - themes, translations into other languages, different fonts, and user action can all change the appropriate size for a given widget. So, it's basically impossible to hardcode a size that will always be correct.

Parameters

widget

a GtkWidget

 

width

minimum width, or -1 to unset

 

height

minimum height, or -1 to unset

 

gtk_widget_set_events ()

void
gtk_widget_set_events (GtkWidget *widget,
                       gint events);

Sets the event mask (see GdkEventMask) for a widget. The event mask determines which events a widget will receive. Keep in mind that different widgets have different default event masks, and by changing the event mask you may disrupt a widget's functionality, so be careful. This function must be called while a widget is unrealized. Consider gtk_widget_add_events() for widgets that are already realized, or if you want to preserve the existing event mask. This function can't be used with GTK_NO_WINDOW widgets; to get events on those widgets, place them inside a GtkEventBox and receive events on the event box.

Parameters

widget

a GtkWidget

 

events

event mask

 

gtk_widget_add_events ()

void
gtk_widget_add_events (GtkWidget *widget,
                       gint events);

Adds the events in the bitfield events to the event mask for widget . See gtk_widget_set_events() for details.

Parameters

widget

a GtkWidget

 

events

an event mask, see GdkEventMask

 

gtk_widget_set_extension_events ()

void
gtk_widget_set_extension_events (GtkWidget *widget,
                                 GdkExtensionMode mode);

Sets the extension events mask to mode . See GdkExtensionMode and gdk_input_set_extension_events().

Parameters

widget

a GtkWidget

 

mode

bitfield of extension events to receive

 

gtk_widget_get_extension_events ()

GdkExtensionMode
gtk_widget_get_extension_events (GtkWidget *widget);

Retrieves the extension events the widget will receive; see gdk_input_set_extension_events().

Parameters

widget

a GtkWidget

 

Returns

extension events for widget


gtk_widget_get_toplevel ()

GtkWidget *
gtk_widget_get_toplevel (GtkWidget *widget);

This function returns the topmost widget in the container hierarchy widget is a part of. If widget has no parent widgets, it will be returned as the topmost widget. No reference will be added to the returned widget; it should not be unreferenced.

Note the difference in behavior vs. gtk_widget_get_ancestor(); gtk_widget_get_ancestor (widget, GTK_TYPE_WINDOW) would return NULL if widget wasn't inside a toplevel window, and if the window was inside a GtkWindow-derived widget which was in turn inside the toplevel GtkWindow. While the second case may seem unlikely, it actually happens when a GtkPlug is embedded inside a GtkSocket within the same application.

To reliably find the toplevel GtkWindow, use gtk_widget_get_toplevel() and check if the TOPLEVEL flags is set on the result.

1
2
3
4
5
GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
if (gtk_widget_is_toplevel (toplevel))
  {
    /* Perform action on toplevel. */
  }

Parameters

widget

a GtkWidget

 

Returns

the topmost ancestor of widget , or widget itself if there's no ancestor.

[transfer none]


gtk_widget_get_ancestor ()

GtkWidget *
gtk_widget_get_ancestor (GtkWidget *widget,
                         GType widget_type);

Gets the first ancestor of widget with type widget_type . For example, gtk_widget_get_ancestor (widget, GTK_TYPE_BOX) gets the first GtkBox that's an ancestor of widget . No reference will be added to the returned widget; it should not be unreferenced. See note about checking for a toplevel GtkWindow in the docs for gtk_widget_get_toplevel().

Note that unlike gtk_widget_is_ancestor(), gtk_widget_get_ancestor() considers widget to be an ancestor of itself.

Parameters

widget

a GtkWidget

 

widget_type

ancestor type

 

Returns

the ancestor widget, or NULL if not found.

[transfer none]


gtk_widget_get_colormap ()

GdkColormap *
gtk_widget_get_colormap (GtkWidget *widget);

Gets the colormap that will be used to render widget . No reference will be added to the returned colormap; it should not be unreferenced.

Parameters

widget

a GtkWidget

 

Returns

the colormap used by widget .

[transfer none]


gtk_widget_set_colormap ()

void
gtk_widget_set_colormap (GtkWidget *widget,
                         GdkColormap *colormap);

Sets the colormap for the widget to the given value. Widget must not have been previously realized. This probably should only be used from an init() function (i.e. from the constructor for the widget).

Parameters

widget

a GtkWidget

 

colormap

a colormap

 

gtk_widget_get_visual ()

GdkVisual *
gtk_widget_get_visual (GtkWidget *widget);

Gets the visual that will be used to render widget .

Parameters

widget

a GtkWidget

 

Returns

the visual for widget .

[transfer none]


gtk_widget_get_events ()

gint
gtk_widget_get_events (GtkWidget *widget);

Returns the event mask for the widget (a bitfield containing flags from the GdkEventMask enumeration). These are the events that the widget will receive.

Parameters

widget

a GtkWidget

 

Returns

event mask for widget


gtk_widget_get_pointer ()

void
gtk_widget_get_pointer (GtkWidget *widget,
                        gint *x,
                        gint *y);

Obtains the location of the mouse pointer in widget coordinates. Widget coordinates are a bit odd; for historical reasons, they are defined as widget->window coordinates for widgets that are not GTK_NO_WINDOW widgets, and are relative to widget->allocation.x , widget->allocation.y for widgets that are GTK_NO_WINDOW widgets.

Parameters

widget

a GtkWidget

 

x

return location for the X coordinate, or NULL.

[out][allow-none]

y

return location for the Y coordinate, or NULL.

[out][allow-none]

gtk_widget_is_ancestor ()

gboolean
gtk_widget_is_ancestor (GtkWidget *widget,
                        GtkWidget *ancestor);

Determines whether widget is somewhere inside ancestor , possibly with intermediate containers.

Parameters

widget

a GtkWidget

 

ancestor

another GtkWidget

 

Returns

TRUE if ancestor contains widget as a child, grandchild, great grandchild, etc.


gtk_widget_translate_coordinates ()

gboolean
gtk_widget_translate_coordinates (GtkWidget *src_widget,
                                  GtkWidget *dest_widget,
                                  gint src_x,
                                  gint src_y,
                                  gint *dest_x,
                                  gint *dest_y);

Translate coordinates relative to src_widget 's allocation to coordinates relative to dest_widget 's allocations. In order to perform this operation, both widgets must be realized, and must share a common toplevel.

Parameters

src_widget

a GtkWidget

 

dest_widget

a GtkWidget

 

src_x

X position relative to src_widget

 

src_y

Y position relative to src_widget

 

dest_x

location to store X position relative to dest_widget .

[out]

dest_y

location to store Y position relative to dest_widget .

[out]

Returns

FALSE if either widget was not realized, or there was no common ancestor. In this case, nothing is stored in *dest_x and *dest_y . Otherwise TRUE.


gtk_widget_hide_on_delete ()

gboolean
gtk_widget_hide_on_delete (GtkWidget *widget);

Utility function; intended to be connected to the “delete-event” signal on a GtkWindow. The function calls gtk_widget_hide() on its argument, then returns TRUE. If connected to ::delete-event, the result is that clicking the close button for a window (on the window frame, top right corner usually) will hide but not destroy the window. By default, GTK+ destroys windows when ::delete-event is received.

Parameters

widget

a GtkWidget

 

Returns

TRUE


gtk_widget_set_style ()

void
gtk_widget_set_style (GtkWidget *widget,
                      GtkStyle *style);

Sets the GtkStyle for a widget (widget->style ). You probably don't want to use this function; it interacts badly with themes, because themes work by replacing the GtkStyle. Instead, use gtk_widget_modify_style().

Parameters

widget

a GtkWidget

 

style

a GtkStyle, or NULL to remove the effect of a previous gtk_widget_set_style() and go back to the default style.

[allow-none]

gtk_widget_set_rc_style()

#define gtk_widget_set_rc_style(widget)          (gtk_widget_set_style (widget, NULL))

gtk_widget_set_rc_style has been deprecated since version 2.0 and should not be used in newly-written code.

Use gtk_widget_set_style() with a NULL style argument instead.

Equivalent to gtk_widget_set_style (widget, NULL).

Parameters

widget

a GtkWidget.

 

gtk_widget_ensure_style ()

void
gtk_widget_ensure_style (GtkWidget *widget);

Ensures that widget has a style (widget->style ). Not a very useful function; most of the time, if you want the style, the widget is realized, and realized widgets are guaranteed to have a style already.

Parameters

widget

a GtkWidget

 

gtk_widget_get_style ()

GtkStyle *
gtk_widget_get_style (GtkWidget *widget);

Simply an accessor function that returns widget->style .

Parameters

widget

a GtkWidget

 

Returns

the widget's GtkStyle.

[transfer none]


gtk_widget_restore_default_style()

#define gtk_widget_restore_default_style(widget) (gtk_widget_set_style (widget, NULL))

gtk_widget_restore_default_style has been deprecated since version 2.0 and should not be used in newly-written code.

Use gtk_widget_set_style() with a NULL style argument instead.

Equivalent to gtk_widget_set_style (widget, NULL).

Parameters

widget

a GtkWidget.

 

gtk_widget_reset_rc_styles ()

void
gtk_widget_reset_rc_styles (GtkWidget *widget);

Reset the styles of widget and all descendents, so when they are looked up again, they get the correct values for the currently loaded RC file settings.

This function is not useful for applications.

Parameters

widget

a GtkWidget.

 

gtk_widget_push_colormap ()

void
gtk_widget_push_colormap (GdkColormap *cmap);

Pushes cmap onto a global stack of colormaps; the topmost colormap on the stack will be used to create all widgets. Remove cmap with gtk_widget_pop_colormap(). There's little reason to use this function.

Parameters

cmap

a GdkColormap

 

gtk_widget_pop_colormap ()

void
gtk_widget_pop_colormap (void);

Removes a colormap pushed with gtk_widget_push_colormap().


gtk_widget_set_default_colormap ()

void
gtk_widget_set_default_colormap (GdkColormap *colormap);

Sets the default colormap to use when creating widgets. gtk_widget_push_colormap() is a better function to use if you only want to affect a few widgets, rather than all widgets.

Parameters

colormap

a GdkColormap

 

gtk_widget_get_default_style ()

GtkStyle *
gtk_widget_get_default_style (void);

Returns the default style used by all widgets initially.

Returns

the default style. This GtkStyle object is owned by GTK+ and should not be modified or freed.

[transfer none]


gtk_widget_get_default_colormap ()

GdkColormap *
gtk_widget_get_default_colormap (void);

Obtains the default colormap used to create widgets.

Returns

default widget colormap.

[transfer none]


gtk_widget_get_default_visual ()

GdkVisual *
gtk_widget_get_default_visual (void);

Obtains the visual of the default colormap. Not really useful; used to be useful before gdk_colormap_get_visual() existed.

Returns

visual of the default colormap.

[transfer none]


gtk_widget_set_direction ()

void
gtk_widget_set_direction (GtkWidget *widget,
                          GtkTextDirection dir);

Sets the reading direction on a particular widget. This direction controls the primary direction for widgets containing text, and also the direction in which the children of a container are packed. The ability to set the direction is present in order so that correct localization into languages with right-to-left reading directions can be done. Generally, applications will let the default reading direction present, except for containers where the containers are arranged in an order that is explicitely visual rather than logical (such as buttons for text justification).

If the direction is set to GTK_TEXT_DIR_NONE, then the value set by gtk_widget_set_default_direction() will be used.

Parameters

widget

a GtkWidget

 

dir

the new direction

 

gtk_widget_get_direction ()

GtkTextDirection
gtk_widget_get_direction (GtkWidget *widget);

Gets the reading direction for a particular widget. See gtk_widget_set_direction().

Parameters

widget

a GtkWidget

 

Returns

the reading direction for the widget.


gtk_widget_set_default_direction ()

void
gtk_widget_set_default_direction (GtkTextDirection dir);

Sets the default reading direction for widgets where the direction has not been explicitly set by gtk_widget_set_direction().

Parameters

dir

the new default direction. This cannot be GTK_TEXT_DIR_NONE.

 

gtk_widget_get_default_direction ()

GtkTextDirection
gtk_widget_get_default_direction (void);

Obtains the current default reading direction. See gtk_widget_set_default_direction().

Returns

the current default direction.


gtk_widget_shape_combine_mask ()

void
gtk_widget_shape_combine_mask (GtkWidget *widget,
                               GdkBitmap *shape_mask,
                               gint offset_x,
                               gint offset_y);

Sets a shape for this widget's GDK window. This allows for transparent windows etc., see gdk_window_shape_combine_mask() for more information.

Parameters

widget

a GtkWidget

 

shape_mask

shape to be added, or NULL to remove an existing shape.

[allow-none]

offset_x

X position of shape mask with respect to window

 

offset_y

Y position of shape mask with respect to window

 

gtk_widget_input_shape_combine_mask ()

void
gtk_widget_input_shape_combine_mask (GtkWidget *widget,
                                     GdkBitmap *shape_mask,
                                     gint offset_x,
                                     gint offset_y);

Sets an input shape for this widget's GDK window. This allows for windows which react to mouse click in a nonrectangular region, see gdk_window_input_shape_combine_mask() for more information.

Parameters

widget

a GtkWidget

 

shape_mask

shape to be added, or NULL to remove an existing shape.

[allow-none]

offset_x

X position of shape mask with respect to window

 

offset_y

Y position of shape mask with respect to window

 

Since: 2.10


gtk_widget_path ()

void
gtk_widget_path (GtkWidget *widget,
                 guint *path_length,
                 gchar **path,
                 gchar **path_reversed);

Obtains the full path to widget . The path is simply the name of a widget and all its parents in the container hierarchy, separated by periods. The name of a widget comes from gtk_widget_get_name(). Paths are used to apply styles to a widget in gtkrc configuration files. Widget names are the type of the widget by default (e.g. "GtkButton") or can be set to an application-specific value with gtk_widget_set_name(). By setting the name of a widget, you allow users or theme authors to apply styles to that specific widget in their gtkrc file. path_reversed_p fills in the path in reverse order, i.e. starting with widget 's name instead of starting with the name of widget 's outermost ancestor.

Parameters

widget

a GtkWidget

 

path_length

location to store length of the path, or NULL.

[out][allow-none]

path

location to store allocated path string, or NULL.

[out][allow-none]

path_reversed

location to store allocated reverse path string, or NULL.

[out][allow-none]

gtk_widget_class_path ()

void
gtk_widget_class_path (GtkWidget *widget,
                       guint *path_length,
                       gchar **path,
                       gchar **path_reversed);

Same as gtk_widget_path(), but always uses the name of a widget's type, never uses a custom name set with gtk_widget_set_name().

Parameters

widget

a GtkWidget

 

path_length

location to store the length of the class path, or NULL.

[out][allow-none]

path

location to store the class path as an allocated string, or NULL.

[out][allow-none]

path_reversed

location to store the reverse class path as an allocated string, or NULL.

[out][allow-none]

gtk_widget_get_composite_name ()

gchar *
gtk_widget_get_composite_name (GtkWidget *widget);

Obtains the composite name of a widget.

Parameters

widget

a GtkWidget

 

Returns

the composite name of widget , or NULL if widget is not a composite child. The string should be freed when it is no longer needed.


gtk_widget_modify_style ()

void
gtk_widget_modify_style (GtkWidget *widget,
                         GtkRcStyle *style);

Modifies style values on the widget. Modifications made using this technique take precedence over style values set via an RC file, however, they will be overriden if a style is explicitely set on the widget using gtk_widget_set_style(). The GtkRcStyle structure is designed so each field can either be set or unset, so it is possible, using this function, to modify some style values and leave the others unchanged.

Note that modifications made with this function are not cumulative with previous calls to gtk_widget_modify_style() or with such functions as gtk_widget_modify_fg(). If you wish to retain previous values, you must first call gtk_widget_get_modifier_style(), make your modifications to the returned style, then call gtk_widget_modify_style() with that style. On the other hand, if you first call gtk_widget_modify_style(), subsequent calls to such functions gtk_widget_modify_fg() will have a cumulative effect with the initial modifications.

Parameters

widget

a GtkWidget

 

style

the GtkRcStyle holding the style modifications

 

gtk_widget_get_modifier_style ()

GtkRcStyle *
gtk_widget_get_modifier_style (GtkWidget *widget);

Returns the current modifier style for the widget. (As set by gtk_widget_modify_style().) If no style has previously set, a new GtkRcStyle will be created with all values unset, and set as the modifier style for the widget. If you make changes to this rc style, you must call gtk_widget_modify_style(), passing in the returned rc style, to make sure that your changes take effect.

Caution: passing the style back to gtk_widget_modify_style() will normally end up destroying it, because gtk_widget_modify_style() copies the passed-in style and sets the copy as the new modifier style, thus dropping any reference to the old modifier style. Add a reference to the modifier style if you want to keep it alive.

Parameters

widget

a GtkWidget

 

Returns

the modifier style for the widget. This rc style is owned by the widget. If you want to keep a pointer to value this around, you must add a refcount using g_object_ref().

[transfer none]


gtk_widget_modify_fg ()

void
gtk_widget_modify_fg (GtkWidget *widget,
                      GtkStateType state,
                      const GdkColor *color);

Sets the foreground color for a widget in a particular state. All other style values are left untouched. See also gtk_widget_modify_style().

Parameters

widget

a GtkWidget

 

state

the state for which to set the foreground color

 

color

the color to assign (does not need to be allocated), or NULL to undo the effect of previous calls to of gtk_widget_modify_fg().

[allow-none]

gtk_widget_modify_bg ()

void
gtk_widget_modify_bg (GtkWidget *widget,
                      GtkStateType state,
                      const GdkColor *color);

Sets the background color for a widget in a particular state. All other style values are left untouched. See also gtk_widget_modify_style().

Note that "no window" widgets (which have the GTK_NO_WINDOW flag set) draw on their parent container's window and thus may not draw any background themselves. This is the case for e.g. GtkLabel. To modify the background of such widgets, you have to set the background color on their parent; if you want to set the background of a rectangular area around a label, try placing the label in a GtkEventBox widget and setting the background color on that.

Parameters

widget

a GtkWidget

 

state

the state for which to set the background color

 

color

the color to assign (does not need to be allocated), or NULL to undo the effect of previous calls to of gtk_widget_modify_bg().

[allow-none]

gtk_widget_modify_text ()

void
gtk_widget_modify_text (GtkWidget *widget,
                        GtkStateType state,
                        const GdkColor *color);

Sets the text color for a widget in a particular state. All other style values are left untouched. The text color is the foreground color used along with the base color (see gtk_widget_modify_base()) for widgets such as GtkEntry and GtkTextView. See also gtk_widget_modify_style().

Parameters

widget

a GtkWidget

 

state

the state for which to set the text color

 

color

the color to assign (does not need to be allocated), or NULL to undo the effect of previous calls to of gtk_widget_modify_text().

[allow-none]

gtk_widget_modify_base ()

void
gtk_widget_modify_base (GtkWidget *widget,
                        GtkStateType state,
                        const GdkColor *color);

Sets the base color for a widget in a particular state. All other style values are left untouched. The base color is the background color used along with the text color (see gtk_widget_modify_text()) for widgets such as GtkEntry and GtkTextView. See also gtk_widget_modify_style().

Note that "no window" widgets (which have the GTK_NO_WINDOW flag set) draw on their parent container's window and thus may not draw any background themselves. This is the case for e.g. GtkLabel. To modify the background of such widgets, you have to set the base color on their parent; if you want to set the background of a rectangular area around a label, try placing the label in a GtkEventBox widget and setting the base color on that.

Parameters

widget

a GtkWidget

 

state

the state for which to set the base color

 

color

the color to assign (does not need to be allocated), or NULL to undo the effect of previous calls to of gtk_widget_modify_base().

[allow-none]

gtk_widget_modify_font ()

void
gtk_widget_modify_font (GtkWidget *widget,
                        PangoFontDescription *font_desc);

Sets the font to use for a widget. All other style values are left untouched. See also gtk_widget_modify_style().

Parameters

widget

a GtkWidget

 

font_desc

the font description to use, or NULL to undo the effect of previous calls to gtk_widget_modify_font().

[allow-none]

gtk_widget_modify_cursor ()

void
gtk_widget_modify_cursor (GtkWidget *widget,
                          const GdkColor *primary,
                          const GdkColor *secondary);

Sets the cursor color to use in a widget, overriding the “cursor-color” and “secondary-cursor-color” style properties. All other style values are left untouched. See also gtk_widget_modify_style().

Parameters

widget

a GtkWidget

 

primary

the color to use for primary cursor (does not need to be allocated), or NULL to undo the effect of previous calls to of gtk_widget_modify_cursor().

 

secondary

the color to use for secondary cursor (does not need to be allocated), or NULL to undo the effect of previous calls to of gtk_widget_modify_cursor().

 

Since: 2.12


gtk_widget_create_pango_context ()

PangoContext *
gtk_widget_create_pango_context (GtkWidget *widget);

Creates a new PangoContext with the appropriate font map, font description, and base direction for drawing text for this widget. See also gtk_widget_get_pango_context().

Parameters

widget

a GtkWidget

 

Returns

the new PangoContext.

[transfer full]


gtk_widget_get_pango_context ()

PangoContext *
gtk_widget_get_pango_context (GtkWidget *widget);

Gets a PangoContext with the appropriate font map, font description, and base direction for this widget. Unlike the context returned by gtk_widget_create_pango_context(), this context is owned by the widget (it can be used until the screen for the widget changes or the widget is removed from its toplevel), and will be updated to match any changes to the widget's attributes.

If you create and keep a PangoLayout using this context, you must deal with changes to the context by calling pango_layout_context_changed() on the layout in response to the “style-set” and “direction-changed” signals for the widget.

Parameters

widget

a GtkWidget

 

Returns

the PangoContext for the widget.

[transfer none]


gtk_widget_create_pango_layout ()

PangoLayout *
gtk_widget_create_pango_layout (GtkWidget *widget,
                                const gchar *text);

Creates a new PangoLayout with the appropriate font map, font description, and base direction for drawing text for this widget.

If you keep a PangoLayout created in this way around, in order to notify the layout of changes to the base direction or font of this widget, you must call pango_layout_context_changed() in response to the “style-set” and “direction-changed” signals for the widget.

Parameters

widget

a GtkWidget

 

text

text to set on the layout (can be NULL)

 

Returns

the new PangoLayout.

[transfer full]


gtk_widget_render_icon ()

GdkPixbuf *
gtk_widget_render_icon (GtkWidget *widget,
                        const gchar *stock_id,
                        GtkIconSize size,
                        const gchar *detail);

A convenience function that uses the theme engine and RC file settings for widget to look up stock_id and render it to a pixbuf. stock_id should be a stock icon ID such as GTK_STOCK_OPEN or GTK_STOCK_OK. size should be a size such as GTK_ICON_SIZE_MENU. detail should be a string that identifies the widget or code doing the rendering, so that theme engines can special-case rendering for that widget or code.

The pixels in the returned GdkPixbuf are shared with the rest of the application and should not be modified. The pixbuf should be freed after use with g_object_unref().

Parameters

widget

a GtkWidget

 

stock_id

a stock ID

 

size

(type int) a stock size. A size of (GtkIconSize)-1 means render at the size of the source and don't scale (if there are multiple source sizes, GTK+ picks one of the available sizes).

 

detail

render detail to pass to theme engine.

[allow-none]

Returns

a new pixbuf, or NULL if the stock ID wasn't known.

[transfer full]


gtk_widget_pop_composite_child ()

void
gtk_widget_pop_composite_child (void);

Cancels the effect of a previous call to gtk_widget_push_composite_child().


gtk_widget_push_composite_child ()

void
gtk_widget_push_composite_child (void);

Makes all newly-created widgets as composite children until the corresponding gtk_widget_pop_composite_child() call.

A composite child is a child that's an implementation detail of the container it's inside and should not be visible to people using the container. Composite children aren't treated differently by GTK (but see gtk_container_foreach() vs. gtk_container_forall()), but e.g. GUI builders might want to treat them in a different way.

Here is a simple example:

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gtk_widget_push_composite_child ();
scrolled_window->hscrollbar = gtk_hscrollbar_new (hadjustment);
gtk_widget_set_composite_name (scrolled_window->hscrollbar, "hscrollbar");
gtk_widget_pop_composite_child ();
gtk_widget_set_parent (scrolled_window->hscrollbar, 
                       GTK_WIDGET (scrolled_window));
g_object_ref (scrolled_window->hscrollbar);


gtk_widget_queue_clear ()

void
gtk_widget_queue_clear (GtkWidget *widget);

gtk_widget_queue_clear has been deprecated since version 2.2 and should not be used in newly-written code.

Use gtk_widget_queue_draw() instead.

This function does the same as gtk_widget_queue_draw().

Parameters

widget

a GtkWidget

 

gtk_widget_queue_clear_area ()

void
gtk_widget_queue_clear_area (GtkWidget *widget,
                             gint x,
                             gint y,
                             gint width,
                             gint height);

gtk_widget_queue_clear_area has been deprecated since version 2.2 and should not be used in newly-written code.

Use gtk_widget_queue_draw_area() instead.

This function is no longer different from gtk_widget_queue_draw_area(), though it once was. Now it just calls gtk_widget_queue_draw_area(). Originally gtk_widget_queue_clear_area() would force a redraw of the background for GTK_NO_WINDOW widgets, and gtk_widget_queue_draw_area() would not. Now both functions ensure the background will be redrawn.

Parameters

widget

a GtkWidget

 

x

x coordinate of upper-left corner of rectangle to redraw

 

y

y coordinate of upper-left corner of rectangle to redraw

 

width

width of region to draw

 

height

height of region to draw

 

gtk_widget_queue_draw_area ()

void
gtk_widget_queue_draw_area (GtkWidget *widget,
                            gint x,
                            gint y,
                            gint width,
                            gint height);

Invalidates the rectangular area of widget defined by x , y , width and height by calling gdk_window_invalidate_rect() on the widget's window and all its child windows. Once the main loop becomes idle (after the current batch of events has been processed, roughly), the window will receive expose events for the union of all regions that have been invalidated.

Normally you would only use this function in widget implementations. You might also use it, or gdk_window_invalidate_rect() directly, to schedule a redraw of a GtkDrawingArea or some portion thereof.

Frequently you can just call gdk_window_invalidate_rect() or gdk_window_invalidate_region() instead of this function. Those functions will invalidate only a single window, instead of the widget and all its children.

The advantage of adding to the invalidated region compared to simply drawing immediately is efficiency; using an invalid region ensures that you only have to redraw one time.

Parameters

widget

a GtkWidget

 

x

x coordinate of upper-left corner of rectangle to redraw

 

y

y coordinate of upper-left corner of rectangle to redraw

 

width

width of region to draw

 

height

height of region to draw

 

gtk_widget_reset_shapes ()

void
gtk_widget_reset_shapes (GtkWidget *widget);

gtk_widget_reset_shapes is deprecated and should not be used in newly-written code.

This function is being removed in GTK+ 3.0. Don't use it.

Recursively resets the shape on this widget and its descendants.

Parameters

widget

a GtkWidget

 

gtk_widget_set_app_paintable ()

void
gtk_widget_set_app_paintable (GtkWidget *widget,
                              gboolean app_paintable);

Sets whether the application intends to draw on the widget in an “expose-event” handler.

This is a hint to the widget and does not affect the behavior of the GTK+ core; many widgets ignore this flag entirely. For widgets that do pay attention to the flag, such as GtkEventBox and GtkWindow, the effect is to suppress default themed drawing of the widget's background. (Children of the widget will still be drawn.) The application is then entirely responsible for drawing the widget background.

Note that the background is still drawn when the widget is mapped. If this is not suitable (e.g. because you want to make a transparent window using an RGBA visual), you can work around this by doing:

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gtk_widget_realize (window);
gdk_window_set_back_pixmap (window->window, NULL, FALSE);
gtk_widget_show (window);

Parameters

widget

a GtkWidget

 

app_paintable

TRUE if the application will paint on the widget

 

gtk_widget_set_double_buffered ()

void
gtk_widget_set_double_buffered (GtkWidget *widget,
                                gboolean double_buffered);

Widgets are double buffered by default; you can use this function to turn off the buffering. "Double buffered" simply means that gdk_window_begin_paint_region() and gdk_window_end_paint() are called automatically around expose events sent to the widget. gdk_window_begin_paint() diverts all drawing to a widget's window to an offscreen buffer, and gdk_window_end_paint() draws the buffer to the screen. The result is that users see the window update in one smooth step, and don't see individual graphics primitives being rendered.

In very simple terms, double buffered widgets don't flicker, so you would only use this function to turn off double buffering if you had special needs and really knew what you were doing.

Note: if you turn off double-buffering, you have to handle expose events, since even the clearing to the background color or pixmap will not happen automatically (as it is done in gdk_window_begin_paint()).

Parameters

widget

a GtkWidget

 

double_buffered

TRUE to double-buffer a widget

 

gtk_widget_set_redraw_on_allocate ()

void
gtk_widget_set_redraw_on_allocate (GtkWidget *widget,
                                   gboolean redraw_on_allocate);

Sets whether the entire widget is queued for drawing when its size allocation changes. By default, this setting is TRUE and the entire widget is redrawn on every size change. If your widget leaves the upper left unchanged when made bigger, turning this setting off will improve performance.

Note that for NO_WINDOW widgets setting this flag to FALSE turns off all allocation on resizing: the widget will not even redraw if its position changes; this is to allow containers that don't draw anything to avoid excess invalidations. If you set this flag on a NO_WINDOW widget that does draw on widget->window , you are responsible for invalidating both the old and new allocation of the widget when the widget is moved and responsible for invalidating regions newly when the widget increases size.

Parameters

widget

a GtkWidget

 

redraw_on_allocate

if TRUE, the entire widget will be redrawn when it is allocated to a new size. Otherwise, only the new portion of the widget will be redrawn.

 

gtk_widget_set_composite_name ()

void
gtk_widget_set_composite_name (GtkWidget *widget,
                               const gchar *name);

Sets a widgets composite name. The widget must be a composite child of its parent; see gtk_widget_push_composite_child().

Parameters

widget

a GtkWidget.

 

name

the name to set

 

gtk_widget_set_scroll_adjustments ()

gboolean
gtk_widget_set_scroll_adjustments (GtkWidget *widget,
                                   GtkAdjustment *hadjustment,
                                   GtkAdjustment *vadjustment);

For widgets that support scrolling, sets the scroll adjustments and returns TRUE. For widgets that don't support scrolling, does nothing and returns FALSE. Widgets that don't support scrolling can be scrolled by placing them in a GtkViewport, which does support scrolling.

Parameters

widget

a GtkWidget

 

hadjustment

an adjustment for horizontal scrolling, or NULL.

[allow-none]

vadjustment

an adjustment for vertical scrolling, or NULL.

[allow-none]

Returns

TRUE if the widget supports scrolling


gtk_widget_mnemonic_activate ()

gboolean
gtk_widget_mnemonic_activate (GtkWidget *widget,
                              gboolean group_cycling);

Emits the “mnemonic-activate” signal.

The default handler for this signal activates the widget if group_cycling is FALSE, and just grabs the focus if group_cycling is TRUE.

Parameters

widget

a GtkWidget

 

group_cycling

TRUE if there are other widgets with the same mnemonic

 

Returns

TRUE if the signal has been handled


gtk_widget_class_install_style_property ()

void
gtk_widget_class_install_style_property
                               (GtkWidgetClass *klass,
                                GParamSpec *pspec);

Installs a style property on a widget class. The parser for the style property is determined by the value type of pspec .

Parameters

klass

a GtkWidgetClass

 

pspec

the GParamSpec for the property

 

gtk_widget_class_install_style_property_parser ()

void
gtk_widget_class_install_style_property_parser
                               (GtkWidgetClass *klass,
                                GParamSpec *pspec,
                                GtkRcPropertyParser parser);

Installs a style property on a widget class.

Parameters

klass

a GtkWidgetClass

 

pspec

the GParamSpec for the style property

 

parser

the parser for the style property

 

gtk_widget_class_find_style_property ()

GParamSpec *
gtk_widget_class_find_style_property (GtkWidgetClass *klass,
                                      const gchar *property_name);

Finds a style property of a widget class by name.

Parameters

klass

a GtkWidgetClass

 

property_name

the name of the style property to find

 

returns

the GParamSpec of the style property or NULL if class has no style property with that name.

[transfer none]

Since: 2.2


gtk_widget_class_list_style_properties ()

GParamSpec **
gtk_widget_class_list_style_properties
                               (GtkWidgetClass *klass,
                                guint *n_properties);

Returns all style properties of a widget class.

Parameters

klass

a GtkWidgetClass

 

n_properties

location to return the number of style properties found

 

returns

an newly allocated array of GParamSpec*. The array must be freed with g_free().

[array length=n_properties][transfer container]

Since: 2.2


gtk_widget_region_intersect ()

GdkRegion *
gtk_widget_region_intersect (GtkWidget *widget,
                             const GdkRegion *region);

Computes the intersection of a widget 's area and region , returning the intersection. The result may be empty, use gdk_region_empty() to check.

Parameters

widget

a GtkWidget

 

region

a GdkRegion, in the same coordinate system as widget->allocation . That is, relative to widget->window for NO_WINDOW widgets; relative to the parent window of widget->window for widgets with their own window.

 

returns

A newly allocated region holding the intersection of widget and region . The coordinates of the return value are relative to widget->window for NO_WINDOW widgets, and relative to the parent window of widget->window for widgets with their own window.

 

gtk_widget_send_expose ()

gint
gtk_widget_send_expose (GtkWidget *widget,
                        GdkEvent *event);

Very rarely-used function. This function is used to emit an expose event signals on a widget. This function is not normally used directly. The only time it is used is when propagating an expose event to a child NO_WINDOW widget, and that is normally done using gtk_container_propagate_expose().

If you want to force an area of a window to be redrawn, use gdk_window_invalidate_rect() or gdk_window_invalidate_region(). To cause the redraw to be done immediately, follow that call with a call to gdk_window_process_updates().

Parameters

widget

a GtkWidget

 

event

a expose GdkEvent

 

Returns

return from the event signal emission (TRUE if the event was handled)


gtk_widget_send_focus_change ()

gboolean
gtk_widget_send_focus_change (GtkWidget *widget,
                              GdkEvent *event);

Sends the focus change event to widget

This function is not meant to be used by applications. The only time it should be used is when it is necessary for a GtkWidget to assign focus to a widget that is semantically owned by the first widget even though it's not a direct child - for instance, a search entry in a floating window similar to the quick search in GtkTreeView.

An example of its usage is:

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GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);

fevent->focus_change.type = GDK_FOCUS_CHANGE;
fevent->focus_change.in = TRUE;
fevent->focus_change.window = gtk_widget_get_window (widget);
if (fevent->focus_change.window != NULL)
  g_object_ref (fevent->focus_change.window);

gtk_widget_send_focus_change (widget, fevent);

gdk_event_free (event);

Parameters

widget

a GtkWidget

 

event

a GdkEvent of type GDK_FOCUS_CHANGE

 

Returns

the return value from the event signal emission: TRUE if the event was handled, and FALSE otherwise

Since: 2.22


gtk_widget_style_get ()

void
gtk_widget_style_get (GtkWidget *widget,
                      const gchar *first_property_name,
                      ...);

Gets the values of a multiple style properties of widget .

Parameters

widget

a GtkWidget

 

first_property_name

the name of the first property to get

 

Varargs

pairs of property names and locations to return the property values, starting with the location for first_property_name , terminated by NULL.

 

gtk_widget_style_get_property ()

void
gtk_widget_style_get_property (GtkWidget *widget,
                               const gchar *property_name,
                               GValue *value);

Gets the value of a style property of widget .

Parameters

widget

a GtkWidget

 

property_name

the name of a style property

 

value

location to return the property value

 

gtk_widget_style_get_valist ()

void
gtk_widget_style_get_valist (GtkWidget *widget,
                             const gchar *first_property_name,
                             va_list var_args);

Non-vararg variant of gtk_widget_style_get(). Used primarily by language bindings.

Parameters

widget

a GtkWidget

 

first_property_name

the name of the first property to get

 

var_args

a va_list of pairs of property names and locations to return the property values, starting with the location for first_property_name .

 

gtk_widget_style_attach ()

void
gtk_widget_style_attach (GtkWidget *style);

This function attaches the widget's GtkStyle to the widget's GdkWindow. It is a replacement for

widget->style = gtk_style_attach (widget->style, widget->window);

and should only ever be called in a derived widget's "realize" implementation which does not chain up to its parent class' "realize" implementation, because one of the parent classes (finally GtkWidget) would attach the style itself.

Parameters

widget

a GtkWidget

 

Since: 2.20


gtk_widget_get_accessible ()

AtkObject *
gtk_widget_get_accessible (GtkWidget *widget);

gtk_widget_get_accessible is deprecated and should not be used in newly-written code.

Returns the accessible object that describes the widget to an assistive technology.

If no accessibility library is loaded (i.e. no ATK implementation library is loaded via GTK_MODULES or via another application library, such as libgnome), then this AtkObject instance may be a no-op. Likewise, if no class-specific AtkObject implementation is available for the widget instance in question, it will inherit an AtkObject implementation from the first ancestor class for which such an implementation is defined.

The documentation of the ATK library contains more information about accessible objects and their uses.

Parameters

widget

a GtkWidget

 

Returns

the AtkObject associated with widget .

[transfer none]


gtk_widget_child_focus ()

gboolean
gtk_widget_child_focus (GtkWidget *widget,
                        GtkDirectionType direction);

This function is used by custom widget implementations; if you're writing an app, you'd use gtk_widget_grab_focus() to move the focus to a particular widget, and gtk_container_set_focus_chain() to change the focus tab order. So you may want to investigate those functions instead.

gtk_widget_child_focus() is called by containers as the user moves around the window using keyboard shortcuts. direction indicates what kind of motion is taking place (up, down, left, right, tab forward, tab backward). gtk_widget_child_focus() emits the “focus” signal; widgets override the default handler for this signal in order to implement appropriate focus behavior.

The default ::focus handler for a widget should return TRUE if moving in direction left the focus on a focusable location inside that widget, and FALSE if moving in direction moved the focus outside the widget. If returning TRUE, widgets normally call gtk_widget_grab_focus() to place the focus accordingly; if returning FALSE, they don't modify the current focus location.

This function replaces gtk_container_focus() from GTK+ 1.2. It was necessary to check that the child was visible, sensitive, and focusable before calling gtk_container_focus(). gtk_widget_child_focus() returns FALSE if the widget is not currently in a focusable state, so there's no need for those checks.

Parameters

widget

a GtkWidget

 

direction

direction of focus movement

 

Returns

TRUE if focus ended up inside widget


gtk_widget_child_notify ()

void
gtk_widget_child_notify (GtkWidget *widget,
                         const gchar *child_property);

Emits a “child-notify” signal for the

child propertychild_property

on widget .

This is the analogue of g_object_notify() for child properties.

Parameters

widget

a GtkWidget

 

child_property

the name of a child property installed on the class of widget 's parent

 

gtk_widget_freeze_child_notify ()

void
gtk_widget_freeze_child_notify (GtkWidget *widget);

Stops emission of “child-notify” signals on widget . The signals are queued until gtk_widget_thaw_child_notify() is called on widget .

This is the analogue of g_object_freeze_notify() for child properties.

Parameters

widget

a GtkWidget

 

gtk_widget_get_child_visible ()

gboolean
gtk_widget_get_child_visible (GtkWidget *widget);

Gets the value set with gtk_widget_set_child_visible(). If you feel a need to use this function, your code probably needs reorganization.

This function is only useful for container implementations and never should be called by an application.

Parameters

widget

a GtkWidget

 

Returns

TRUE if the widget is mapped with the parent.


gtk_widget_get_parent ()

GtkWidget *
gtk_widget_get_parent (GtkWidget *widget);

Returns the parent container of widget .

Parameters

widget

a GtkWidget

 

Returns

the parent container of widget , or NULL.

[transfer none]


gtk_widget_get_settings ()

GtkSettings *
gtk_widget_get_settings (GtkWidget *widget);

Gets the settings object holding the settings (global property settings, RC file information, etc) used for this widget.

Note that this function can only be called when the GtkWidget is attached to a toplevel, since the settings object is specific to a particular GdkScreen.

Parameters

widget

a GtkWidget

 

Returns

the relevant GtkSettings object.

[transfer none]


gtk_widget_get_clipboard ()

GtkClipboard *
gtk_widget_get_clipboard (GtkWidget *widget,
                          GdkAtom selection);

Returns the clipboard object for the given selection to be used with widget . widget must have a GdkDisplay associated with it, so must be attached to a toplevel window.

Parameters

widget

a GtkWidget

 

selection

a GdkAtom which identifies the clipboard to use. GDK_SELECTION_CLIPBOARD gives the default clipboard. Another common value is GDK_SELECTION_PRIMARY, which gives the primary X selection.

 

Returns

the appropriate clipboard object. If no clipboard already exists, a new one will be created. Once a clipboard object has been created, it is persistent for all time.

[transfer none]

Since: 2.2


gtk_widget_get_display ()

GdkDisplay *
gtk_widget_get_display (GtkWidget *widget);

Get the GdkDisplay for the toplevel window associated with this widget. This function can only be called after the widget has been added to a widget hierarchy with a GtkWindow at the top.

In general, you should only create display specific resources when a widget has been realized, and you should free those resources when the widget is unrealized.

Parameters

widget

a GtkWidget

 

Returns

the GdkDisplay for the toplevel for this widget.

[transfer none]

Since: 2.2


gtk_widget_get_root_window ()

GdkWindow *
gtk_widget_get_root_window (GtkWidget *widget);

Get the root window where this widget is located. This function can only be called after the widget has been added to a widget hierarchy with GtkWindow at the top.

The root window is useful for such purposes as creating a popup GdkWindow associated with the window. In general, you should only create display specific resources when a widget has been realized, and you should free those resources when the widget is unrealized.

Parameters

widget

a GtkWidget

 

Returns

the GdkWindow root window for the toplevel for this widget.

[transfer none]

Since: 2.2


gtk_widget_get_screen ()

GdkScreen *
gtk_widget_get_screen (GtkWidget *widget);

Get the GdkScreen from the toplevel window associated with this widget. This function can only be called after the widget has been added to a widget hierarchy with a GtkWindow at the top.

In general, you should only create screen specific resources when a widget has been realized, and you should free those resources when the widget is unrealized.

Parameters

widget

a GtkWidget

 

Returns

the GdkScreen for the toplevel for this widget.

[transfer none]

Since: 2.2


gtk_widget_has_screen ()

gboolean
gtk_widget_has_screen (GtkWidget *widget);

Checks whether there is a GdkScreen is associated with this widget. All toplevel widgets have an associated screen, and all widgets added into a hierarchy with a toplevel window at the top.

Parameters

widget

a GtkWidget

 

Returns

TRUE if there is a GdkScreen associcated with the widget.

Since: 2.2


gtk_widget_get_size_request ()

void
gtk_widget_get_size_request (GtkWidget *widget,
                             gint *width,
                             gint *height);

Gets the size request that was explicitly set for the widget using gtk_widget_set_size_request(). A value of -1 stored in width or height indicates that that dimension has not been set explicitly and the natural requisition of the widget will be used intead. See gtk_widget_set_size_request(). To get the size a widget will actually use, call gtk_widget_size_request() instead of this function.

Parameters

widget

a GtkWidget

 

width

return location for width, or NULL.

[out][allow-none]

height

return location for height, or NULL.

[out][allow-none]

gtk_widget_pop_visual

#define gtk_widget_pop_visual()               ((void) 0)

gtk_widget_pop_visual is deprecated and should not be used in newly-written code.

This function is deprecated; it does nothing.


gtk_widget_push_visual()

#define gtk_widget_push_visual(visual)        ((void) 0)

gtk_widget_push_visual is deprecated and should not be used in newly-written code.

This function is deprecated; it does nothing.

Parameters

visual

a visual

 

gtk_widget_set_child_visible ()

void
gtk_widget_set_child_visible (GtkWidget *widget,
                              gboolean is_visible);

Sets whether widget should be mapped along with its when its parent is mapped and widget has been shown with gtk_widget_show().

The child visibility can be set for widget before it is added to a container with gtk_widget_set_parent(), to avoid mapping children unnecessary before immediately unmapping them. However it will be reset to its default state of TRUE when the widget is removed from a container.

Note that changing the child visibility of a widget does not queue a resize on the widget. Most of the time, the size of a widget is computed from all visible children, whether or not they are mapped. If this is not the case, the container can queue a resize itself.

This function is only useful for container implementations and never should be called by an application.

Parameters

widget

a GtkWidget

 

is_visible

if TRUE, widget should be mapped along with its parent.

 

gtk_widget_set_default_visual()

#define gtk_widget_set_default_visual(visual) ((void) 0)

gtk_widget_set_default_visual is deprecated and should not be used in newly-written code.

This function is deprecated; it does nothing.

Parameters

visual

a visual

 

gtk_widget_set_size_request ()

void
gtk_widget_set_size_request (GtkWidget *widget,
                             gint width,
                             gint height);

Sets the minimum size of a widget; that is, the widget's size request will be width by height . You can use this function to force a widget to be either larger or smaller than it normally would be.

In most cases, gtk_window_set_default_size() is a better choice for toplevel windows than this function; setting the default size will still allow users to shrink the window. Setting the size request will force them to leave the window at least as large as the size request. When dealing with window sizes, gtk_window_set_geometry_hints() can be a useful function as well.

Note the inherent danger of setting any fixed size - themes, translations into other languages, different fonts, and user action can all change the appropriate size for a given widget. So, it's basically impossible to hardcode a size that will always be correct.

The size request of a widget is the smallest size a widget can accept while still functioning well and drawing itself correctly. However in some strange cases a widget may be allocated less than its requested size, and in many cases a widget may be allocated more space than it requested.

If the size request in a given direction is -1 (unset), then the "natural" size request of the widget will be used instead.

Widgets can't actually be allocated a size less than 1 by 1, but you can pass 0,0 to this function to mean "as small as possible."

Parameters

widget

a GtkWidget

 

width

width widget should request, or -1 to unset

 

height

height widget should request, or -1 to unset

 

gtk_widget_set_visual()

#define gtk_widget_set_visual(widget,visual)  ((void) 0)

gtk_widget_set_visual is deprecated and should not be used in newly-written code.

This function is deprecated; it does nothing.

Parameters

widget

a GtkWidget

 

visual

a visual

 

gtk_widget_thaw_child_notify ()

void
gtk_widget_thaw_child_notify (GtkWidget *widget);

Reverts the effect of a previous call to gtk_widget_freeze_child_notify(). This causes all queued “child-notify” signals on widget to be emitted.

Parameters

widget

a GtkWidget

 

gtk_widget_set_no_show_all ()

void
gtk_widget_set_no_show_all (GtkWidget *widget,
                            gboolean no_show_all);

Sets the “no-show-all” property, which determines whether calls to gtk_widget_show_all() and gtk_widget_hide_all() will affect this widget.

This is mostly for use in constructing widget hierarchies with externally controlled visibility, see GtkUIManager.

Parameters

widget

a GtkWidget

 

no_show_all

the new value for the "no-show-all" property

 

Since: 2.4


gtk_widget_get_no_show_all ()

gboolean
gtk_widget_get_no_show_all (GtkWidget *widget);

Returns the current value of the GtkWidget:no-show-all property, which determines whether calls to gtk_widget_show_all() and gtk_widget_hide_all() will affect this widget.

Parameters

widget

a GtkWidget

 

Returns

the current value of the "no-show-all" property.

Since: 2.4


gtk_widget_list_mnemonic_labels ()

GList *
gtk_widget_list_mnemonic_labels (GtkWidget *widget);

Returns a newly allocated list of the widgets, normally labels, for which this widget is a the target of a mnemonic (see for example, gtk_label_set_mnemonic_widget()).

The widgets in the list are not individually referenced. If you want to iterate through the list and perform actions involving callbacks that might destroy the widgets, you must call g_list_foreach (result, (GFunc)g_object_ref, NULL) first, and then unref all the widgets afterwards.

Parameters

widget

a GtkWidget

 

Returns

the list of mnemonic labels; free this list with g_list_free() when you are done with it.

[element-type GtkWidget][transfer container]

Since: 2.4


gtk_widget_add_mnemonic_label ()

void
gtk_widget_add_mnemonic_label (GtkWidget *widget,
                               GtkWidget *label);

Adds a widget to the list of mnemonic labels for this widget. (See gtk_widget_list_mnemonic_labels()). Note the list of mnemonic labels for the widget is cleared when the widget is destroyed, so the caller must make sure to update its internal state at this point as well, by using a connection to the “destroy” signal or a weak notifier.

Parameters

widget

a GtkWidget

 

label

a GtkWidget that acts as a mnemonic label for widget

 

Since: 2.4


gtk_widget_remove_mnemonic_label ()

void
gtk_widget_remove_mnemonic_label (GtkWidget *widget,
                                  GtkWidget *label);

Removes a widget from the list of mnemonic labels for this widget. (See gtk_widget_list_mnemonic_labels()). The widget must have previously been added to the list with gtk_widget_add_mnemonic_label().

Parameters

widget

a GtkWidget

 

label

a GtkWidget that was previously set as a mnemnic label for widget with gtk_widget_add_mnemonic_label().

 

Since: 2.4


gtk_widget_get_action ()

GtkAction *
gtk_widget_get_action (GtkWidget *widget);

gtk_widget_get_action has been deprecated since version 2.16 and should not be used in newly-written code.

Use gtk_activatable_get_related_action() instead.

Returns the GtkAction that widget is a proxy for. See also gtk_action_get_proxies().

Parameters

widget

a GtkWidget

 

Returns

the action that a widget is a proxy for, or NULL, if it is not attached to an action.

Since: 2.10


gtk_widget_is_composited ()

gboolean
gtk_widget_is_composited (GtkWidget *widget);

Whether widget can rely on having its alpha channel drawn correctly. On X11 this function returns whether a compositing manager is running for widget 's screen.

Please note that the semantics of this call will change in the future if used on a widget that has a composited window in its hierarchy (as set by gdk_window_set_composited()).

Parameters

widget

a GtkWidget

 

Returns

TRUE if the widget can rely on its alpha channel being drawn correctly.

Since: 2.10


gtk_widget_error_bell ()

void
gtk_widget_error_bell (GtkWidget *widget);

Notifies the user about an input-related error on this widget. If the “gtk-error-bell” setting is TRUE, it calls gdk_window_beep(), otherwise it does nothing.

Note that the effect of gdk_window_beep() can be configured in many ways, depending on the windowing backend and the desktop environment or window manager that is used.

Parameters

widget

a GtkWidget

 

Since: 2.12


gtk_widget_keynav_failed ()

gboolean
gtk_widget_keynav_failed (GtkWidget *widget,
                          GtkDirectionType direction);

This function should be called whenever keyboard navigation within a single widget hits a boundary. The function emits the “keynav-failed” signal on the widget and its return value should be interpreted in a way similar to the return value of gtk_widget_child_focus():

When TRUE is returned, stay in the widget, the failed keyboard navigation is Ok and/or there is nowhere we can/should move the focus to.

When FALSE is returned, the caller should continue with keyboard navigation outside the widget, e.g. by calling gtk_widget_child_focus() on the widget's toplevel.

The default ::keynav-failed handler returns TRUE for GTK_DIR_TAB_FORWARD and GTK_DIR_TAB_BACKWARD. For the other values of GtkDirectionType, it looks at the “gtk-keynav-cursor-only” setting and returns FALSE if the setting is TRUE. This way the entire user interface becomes cursor-navigatable on input devices such as mobile phones which only have cursor keys but no tab key.

Whenever the default handler returns TRUE, it also calls gtk_widget_error_bell() to notify the user of the failed keyboard navigation.

A use case for providing an own implementation of ::keynav-failed (either by connecting to it or by overriding it) would be a row of GtkEntry widgets where the user should be able to navigate the entire row with the cursor keys, as e.g. known from user interfaces that require entering license keys.

Parameters

widget

a GtkWidget

 

direction

direction of focus movement

 

Returns

TRUE if stopping keyboard navigation is fine, FALSE if the emitting widget should try to handle the keyboard navigation attempt in its parent container(s).

Since: 2.12


gtk_widget_get_tooltip_markup ()

gchar *
gtk_widget_get_tooltip_markup (GtkWidget *widget);

Gets the contents of the tooltip for widget .

Parameters

widget

a GtkWidget

 

Returns

the tooltip text, or NULL. You should free the returned string with g_free() when done.

Since: 2.12


gtk_widget_set_tooltip_markup ()

void
gtk_widget_set_tooltip_markup (GtkWidget *widget,
                               const gchar *markup);

Sets markup as the contents of the tooltip, which is marked up with the Pango text markup language.

This function will take care of setting GtkWidget:has-tooltip to TRUE and of the default handler for the GtkWidget::query-tooltip signal.

See also the GtkWidget:tooltip-markup property and gtk_tooltip_set_markup().

Parameters

widget

a GtkWidget

 

markup

the contents of the tooltip for widget , or NULL.

[allow-none]

Since: 2.12


gtk_widget_get_tooltip_text ()

gchar *
gtk_widget_get_tooltip_text (GtkWidget *widget);

Gets the contents of the tooltip for widget .

Parameters

widget

a GtkWidget

 

Returns

the tooltip text, or NULL. You should free the returned string with g_free() when done.

Since: 2.12


gtk_widget_set_tooltip_text ()

void
gtk_widget_set_tooltip_text (GtkWidget *widget,
                             const gchar *text);

Sets text as the contents of the tooltip. This function will take care of setting GtkWidget:has-tooltip to TRUE and of the default handler for the GtkWidget::query-tooltip signal.

See also the GtkWidget:tooltip-text property and gtk_tooltip_set_text().

Parameters

widget

a GtkWidget

 

text

the contents of the tooltip for widget

 

Since: 2.12


gtk_widget_get_tooltip_window ()

GtkWindow *
gtk_widget_get_tooltip_window (GtkWidget *widget);

Returns the GtkWindow of the current tooltip. This can be the GtkWindow created by default, or the custom tooltip window set using gtk_widget_set_tooltip_window().

Parameters

widget

a GtkWidget

 

Returns

The GtkWindow of the current tooltip.

[transfer none]

Since: 2.12


gtk_widget_set_tooltip_window ()

void
gtk_widget_set_tooltip_window (GtkWidget *widget,
                               GtkWindow *custom_window);

Replaces the default, usually yellow, window used for displaying tooltips with custom_window . GTK+ will take care of showing and hiding custom_window at the right moment, to behave likewise as the default tooltip window. If custom_window is NULL, the default tooltip window will be used.

If the custom window should have the default theming it needs to have the name "gtk-tooltip", see gtk_widget_set_name().

Parameters

widget

a GtkWidget

 

custom_window

a GtkWindow, or NULL.

[allow-none]

Since: 2.12


gtk_widget_get_has_tooltip ()

gboolean
gtk_widget_get_has_tooltip (GtkWidget *widget);

Returns the current value of the has-tooltip property. See GtkWidget:has-tooltip for more information.

Parameters

widget

a GtkWidget

 

Returns

current value of has-tooltip on widget .

Since: 2.12


gtk_widget_set_has_tooltip ()

void
gtk_widget_set_has_tooltip (GtkWidget *widget,
                            gboolean has_tooltip);

Sets the has-tooltip property on widget to has_tooltip . See GtkWidget:has-tooltip for more information.

Parameters

widget

a GtkWidget

 

has_tooltip

whether or not widget has a tooltip.

 

Since: 2.12


gtk_widget_trigger_tooltip_query ()

void
gtk_widget_trigger_tooltip_query (GtkWidget *widget);

Triggers a tooltip query on the display where the toplevel of widget is located. See gtk_tooltip_trigger_tooltip_query() for more information.

Parameters

widget

a GtkWidget

 

Since: 2.12


gtk_widget_get_snapshot ()

GdkPixmap *
gtk_widget_get_snapshot (GtkWidget *widget,
                         GdkRectangle *clip_rect);

Create a GdkPixmap of the contents of the widget and its children.

Works even if the widget is obscured. The depth and visual of the resulting pixmap is dependent on the widget being snapshot and likely differs from those of a target widget displaying the pixmap. The function gdk_pixbuf_get_from_drawable() can be used to convert the pixmap to a visual independant representation.

The snapshot area used by this function is the widget 's allocation plus any extra space occupied by additional windows belonging to this widget (such as the arrows of a spin button). Thus, the resulting snapshot pixmap is possibly larger than the allocation.

If clip_rect is non-NULL, the resulting pixmap is shrunken to match the specified clip_rect. The (x,y) coordinates of clip_rect are interpreted widget relative. If width or height of clip_rect are 0 or negative, the width or height of the resulting pixmap will be shrunken by the respective amount. For instance a clip_rect { +5, +5, -10, -10 } will chop off 5 pixels at each side of the snapshot pixmap. If non-NULL, clip_rect will contain the exact widget-relative snapshot coordinates upon return. A clip_rect of { -1, -1, 0, 0 } can be used to preserve the auto-grown snapshot area and use clip_rect as a pure output parameter.

The returned pixmap can be NULL, if the resulting clip_area was empty.

Parameters

widget

a GtkWidget

 

clip_rect

a GdkRectangle or NULL.

[allow-none]

Returns

GdkPixmap snapshot of the widget

Since: 2.14


gtk_widget_get_window ()

GdkWindow *
gtk_widget_get_window (GtkWidget *widget);

Returns the widget's window if it is realized, NULL otherwise

Parameters

widget

a GtkWidget

 

Returns

widget 's window.

[transfer none]

Since: 2.14


gtk_widget_get_allocation ()

void
gtk_widget_get_allocation (GtkWidget *widget,
                           GtkAllocation *allocation);

Retrieves the widget's allocation.

Parameters

widget

a GtkWidget

 

allocation

a pointer to a GtkAllocation to copy to.

[out]

Since: 2.18


gtk_widget_set_allocation ()

void
gtk_widget_set_allocation (GtkWidget *widget,
                           const GtkAllocation *allocation);

Sets the widget's allocation. This should not be used directly, but from within a widget's size_allocate method.

Parameters

widget

a GtkWidget

 

allocation

a pointer to a GtkAllocation to copy from

 

Since: 2.18


gtk_widget_get_app_paintable ()

gboolean
gtk_widget_get_app_paintable (GtkWidget *widget);

Determines whether the application intends to draw on the widget in an “expose-event” handler.

See gtk_widget_set_app_paintable()

Parameters

widget

a GtkWidget

 

Returns

TRUE if the widget is app paintable

Since: 2.18


gtk_widget_get_can_default ()

gboolean
gtk_widget_get_can_default (GtkWidget *widget);

Determines whether widget can be a default widget. See gtk_widget_set_can_default().

Parameters

widget

a GtkWidget

 

Returns

TRUE if widget can be a default widget, FALSE otherwise

Since: 2.18


gtk_widget_set_can_default ()

void
gtk_widget_set_can_default (GtkWidget *widget,
                            gboolean can_default);

Specifies whether widget can be a default widget. See gtk_widget_grab_default() for details about the meaning of "default".

Parameters

widget

a GtkWidget

 

can_default

whether or not widget can be a default widget.

 

Since: 2.18


gtk_widget_get_can_focus ()

gboolean
gtk_widget_get_can_focus (GtkWidget *widget);

Determines whether widget can own the input focus. See gtk_widget_set_can_focus().

Parameters

widget

a GtkWidget

 

Returns

TRUE if widget can own the input focus, FALSE otherwise

Since: 2.18


gtk_widget_set_can_focus ()

void
gtk_widget_set_can_focus (GtkWidget *widget,
                          gboolean can_focus);

Specifies whether widget can own the input focus. See gtk_widget_grab_focus() for actually setting the input focus on a widget.

Parameters

widget

a GtkWidget

 

can_focus

whether or not widget can own the input focus.

 

Since: 2.18


gtk_widget_get_double_buffered ()

gboolean
gtk_widget_get_double_buffered (GtkWidget *widget);

Determines whether the widget is double buffered.

See gtk_widget_set_double_buffered()

Parameters

widget

a GtkWidget

 

Returns

TRUE if the widget is double buffered

Since: 2.18


gtk_widget_get_has_window ()

gboolean
gtk_widget_get_has_window (GtkWidget *widget);

Determines whether widget has a GdkWindow of its own. See gtk_widget_set_has_window().

Parameters

widget

a GtkWidget

 

Returns

TRUE if widget has a window, FALSE otherwise

Since: 2.18


gtk_widget_set_has_window ()

void
gtk_widget_set_has_window (GtkWidget *widget,
                           gboolean has_window);

Specifies whether widget has a GdkWindow of its own. Note that all realized widgets have a non-NULL "window" pointer (gtk_widget_get_window() never returns a NULL window when a widget is realized), but for many of them it's actually the GdkWindow of one of its parent widgets. Widgets that do not create a window for themselves in GtkWidget::realize() must announce this by calling this function with has_window = FALSE.

This function should only be called by widget implementations, and they should call it in their init() function.

Parameters

widget

a GtkWidget

 

has_window

whether or not widget has a window.

 

Since: 2.18


gtk_widget_get_sensitive ()

gboolean
gtk_widget_get_sensitive (GtkWidget *widget);

Returns the widget's sensitivity (in the sense of returning the value that has been set using gtk_widget_set_sensitive()).

The effective sensitivity of a widget is however determined by both its own and its parent widget's sensitivity. See gtk_widget_is_sensitive().

Parameters

widget

a GtkWidget

 

Returns

TRUE if the widget is sensitive

Since: 2.18


gtk_widget_is_sensitive ()

gboolean
gtk_widget_is_sensitive (GtkWidget *widget);

Returns the widget's effective sensitivity, which means it is sensitive itself and also its parent widget is sensntive

Parameters

widget

a GtkWidget

 

Returns

TRUE if the widget is effectively sensitive

Since: 2.18


gtk_widget_get_state ()

GtkStateType
gtk_widget_get_state (GtkWidget *widget);

Returns the widget's state. See gtk_widget_set_state().

Parameters

widget

a GtkWidget

 

Returns

the state of widget .

Since: 2.18


gtk_widget_get_visible ()

gboolean
gtk_widget_get_visible (GtkWidget *widget);

Determines whether the widget is visible. Note that this doesn't take into account whether the widget's parent is also visible or the widget is obscured in any way.

See gtk_widget_set_visible().

Parameters

widget

a GtkWidget

 

Returns

TRUE if the widget is visible

Since: 2.18


gtk_widget_set_visible ()

void
gtk_widget_set_visible (GtkWidget *widget,
                        gboolean visible);

Sets the visibility state of widget . Note that setting this to TRUE doesn't mean the widget is actually viewable, see gtk_widget_get_visible().

This function simply calls gtk_widget_show() or gtk_widget_hide() but is nicer to use when the visibility of the widget depends on some condition.

Parameters

widget

a GtkWidget

 

visible

whether the widget should be shown or not

 

Since: 2.18


gtk_widget_has_default ()

gboolean
gtk_widget_has_default (GtkWidget *widget);

Determines whether widget is the current default widget within its toplevel. See gtk_widget_set_can_default().

Parameters

widget

a GtkWidget

 

Returns

TRUE if widget is the current default widget within its toplevel, FALSE otherwise

Since: 2.18


gtk_widget_has_focus ()

gboolean
gtk_widget_has_focus (GtkWidget *widget);

Determines if the widget has the global input focus. See gtk_widget_is_focus() for the difference between having the global input focus, and only having the focus within a toplevel.

Parameters

widget

a GtkWidget

 

Returns

TRUE if the widget has the global input focus.

Since: 2.18


gtk_widget_has_grab ()

gboolean
gtk_widget_has_grab (GtkWidget *widget);

Determines whether the widget is currently grabbing events, so it is the only widget receiving input events (keyboard and mouse).

See also gtk_grab_add().

Parameters

widget

a GtkWidget

 

Returns

TRUE if the widget is in the grab_widgets stack

Since: 2.18


gtk_widget_has_rc_style ()

gboolean
gtk_widget_has_rc_style (GtkWidget *widget);

Determines if the widget style has been looked up through the rc mechanism.

Parameters

widget

a GtkWidget

 

Returns

TRUE if the widget has been looked up through the rc mechanism, FALSE otherwise.

Since: 2.20


gtk_widget_is_drawable ()

gboolean
gtk_widget_is_drawable (GtkWidget *widget);

Determines whether widget can be drawn to. A widget can be drawn to if it is mapped and visible.

Parameters

widget

a GtkWidget

 

Returns

TRUE if widget is drawable, FALSE otherwise

Since: 2.18


gtk_widget_is_toplevel ()

gboolean
gtk_widget_is_toplevel (GtkWidget *widget);

Determines whether widget is a toplevel widget. Currently only GtkWindow and GtkInvisible are toplevel widgets. Toplevel widgets have no parent widget.

Parameters

widget

a GtkWidget

 

Returns

TRUE if widget is a toplevel, FALSE otherwise

Since: 2.18


gtk_widget_set_window ()

void
gtk_widget_set_window (GtkWidget *widget,
                       GdkWindow *window);

Sets a widget's window. This function should only be used in a widget's GtkWidget::realize() implementation. The window passed is usually either new window created with gdk_window_new(), or the window of its parent widget as returned by gtk_widget_get_parent_window().

Widgets must indicate whether they will create their own GdkWindow by calling gtk_widget_set_has_window(). This is usually done in the widget's init() function.

Parameters

widget

a GtkWidget

 

window

a GdkWindow

 

Since: 2.18


gtk_widget_set_receives_default ()

void
gtk_widget_set_receives_default (GtkWidget *widget,
                                 gboolean receives_default);

Specifies whether widget will be treated as the default widget within its toplevel when it has the focus, even if another widget is the default.

See gtk_widget_grab_default() for details about the meaning of "default".

Parameters

widget

a GtkWidget

 

receives_default

whether or not widget can be a default widget.

 

Since: 2.18


gtk_widget_get_receives_default ()

gboolean
gtk_widget_get_receives_default (GtkWidget *widget);

Determines whether widget is alyways treated as default widget withing its toplevel when it has the focus, even if another widget is the default.

See gtk_widget_set_receives_default().

Parameters

widget

a GtkWidget

 

Returns

TRUE if widget acts as default widget when focussed, FALSE otherwise

Since: 2.18


gtk_widget_set_realized ()

void
gtk_widget_set_realized (GtkWidget *widget,
                         gboolean realized);

Marks the widget as being realized.

This function should only ever be called in a derived widget's "realize" or "unrealize" implementation.

Parameters

widget

a GtkWidget

 

realized

TRUE to mark the widget as realized

 

Since: 2.20


gtk_widget_get_realized ()

gboolean
gtk_widget_get_realized (GtkWidget *widget);

Determines whether widget is realized.

Parameters

widget

a GtkWidget

 

Returns

TRUE if widget is realized, FALSE otherwise

Since: 2.20


gtk_widget_set_mapped ()

void
gtk_widget_set_mapped (GtkWidget *widget,
                       gboolean mapped);

Marks the widget as being realized.

This function should only ever be called in a derived widget's "map" or "unmap" implementation.

Parameters

widget

a GtkWidget

 

mapped

TRUE to mark the widget as mapped

 

Since: 2.20


gtk_widget_get_mapped ()

gboolean
gtk_widget_get_mapped (GtkWidget *widget);

Whether the widget is mapped.

Parameters

widget

a GtkWidget

 

Returns

TRUE if the widget is mapped, FALSE otherwise.

Since: 2.20


gtk_widget_get_requisition ()

void
gtk_widget_get_requisition (GtkWidget *widget,
                            GtkRequisition *requisition);

Retrieves the widget's requisition.

This function should only be used by widget implementations in order to figure whether the widget's requisition has actually changed after some internal state change (so that they can call gtk_widget_queue_resize() instead of gtk_widget_queue_draw()).

Normally, gtk_widget_size_request() should be used.

Parameters

widget

a GtkWidget

 

requisition

a pointer to a GtkRequisition to copy to.

[out]

Since: 2.20


gtk_requisition_copy ()

GtkRequisition *
gtk_requisition_copy (const GtkRequisition *requisition);

Copies a GtkRequisition.

Parameters

requisition

a GtkRequisition

 

Returns

a copy of requisition


gtk_requisition_free ()

void
gtk_requisition_free (GtkRequisition *requisition);

Frees a GtkRequisition.

Parameters

requisition

a GtkRequisition

 

Types and Values

GtkWidget

typedef struct {
  /* The style for the widget. The style contains the
   *  colors the widget should be drawn in for each state
   *  along with graphics contexts used to draw with and
   *  the font to use for text.
   */
  GtkStyle *GSEAL (style);
  
  /* The widget's desired size.
   */
  GtkRequisition GSEAL (requisition);
  
  /* The widget's allocated size.
   */
  GtkAllocation GSEAL (allocation);
  
  /* The widget's window or its parent window if it does
   *  not have a window. (Which will be indicated by the
   *  GTK_NO_WINDOW flag being set).
   */
  GdkWindow *GSEAL (window);
  
  /* The widget's parent.
   */
  GtkWidget *GSEAL (parent);
} GtkWidget;

struct GtkWidgetClass

struct GtkWidgetClass {
  /* The object class structure needs to be the first
   *  element in the widget class structure in order for
   *  the class mechanism to work correctly. This allows a
   *  GtkWidgetClass pointer to be cast to a GtkObjectClass
   *  pointer.
   */
  GtkObjectClass parent_class;

  
  guint activate_signal;

  guint set_scroll_adjustments_signal;
};

activate_signal The signal to emit when a widget of this class is activated, gtk_widget_activate() handles the emission. Implementation of this signal is optional.

set_scroll_adjustment_signal This signal is emitted when a widget of this class is added to a scrolling aware parent, gtk_widget_set_scroll_adjustments() handles the emission. Implementation of this signal is optional.


enum GtkWidgetFlags

Tells about certain properties of the widget.

Members

GTK_TOPLEVEL

widgets without a real parent, as there are GtkWindows and GtkMenus have this flag set throughout their lifetime. Toplevel widgets always contain their own GdkWindow.

 

GTK_NO_WINDOW

Indicative for a widget that does not provide its own GdkWindow. Visible action (e.g. drawing) is performed on the parent's GdkWindow.

 

GTK_REALIZED

Set by gtk_widget_realize(), unset by gtk_widget_unrealize(). A realized widget has an associated GdkWindow.

 

GTK_MAPPED

Set by gtk_widget_map(), unset by gtk_widget_unmap(). Only realized widgets can be mapped. It means that gdk_window_show() has been called on the widgets window(s).

 

GTK_VISIBLE

Set by gtk_widget_show(), unset by gtk_widget_hide(). Implies that a widget will be mapped as soon as its parent is mapped.

 

GTK_SENSITIVE

Set and unset by gtk_widget_set_sensitive(). The sensitivity of a widget determines whether it will receive certain events (e.g. button or key presses). One premise for the widget's sensitivity is to have this flag set.

 

GTK_PARENT_SENSITIVE

Set and unset by gtk_widget_set_sensitive() operations on the parents of the widget. This is the second premise for the widget's sensitivity. Once it has GTK_SENSITIVE and GTK_PARENT_SENSITIVE set, its state is effectively sensitive. This is expressed (and can be examined) by the GTK_WIDGET_IS_SENSITIVE macro.

 

GTK_CAN_FOCUS

Determines whether a widget is able to handle focus grabs.

 

GTK_HAS_FOCUS

Set by gtk_widget_grab_focus() for widgets that also have GTK_CAN_FOCUS set. The flag will be unset once another widget grabs the focus.

 

GTK_CAN_DEFAULT

The widget is allowed to receive the default action via gtk_widget_grab_default() and will reserve space to draw the default if possible

 

GTK_HAS_DEFAULT

The widget currently is receiving the default action and should be drawn appropriately if possible

 

GTK_HAS_GRAB

Set by gtk_grab_add(), unset by gtk_grab_remove(). It means that the widget is in the grab_widgets stack, and will be the preferred one for receiving events other than ones of cosmetic value.

 

GTK_RC_STYLE

Indicates that the widget's style has been looked up through the rc mechanism. It does not imply that the widget actually had a style defined through the rc mechanism.

 

GTK_COMPOSITE_CHILD

Indicates that the widget is a composite child of its parent; see gtk_widget_push_composite_child(), gtk_widget_pop_composite_child().

 

GTK_NO_REPARENT

Unused since before GTK+ 1.2, will be removed in a future version.

 

GTK_APP_PAINTABLE

Set and unset by gtk_widget_set_app_paintable(). Must be set on widgets whose window the application directly draws on, in order to keep GTK+ from overwriting the drawn stuff. See

the section called “App-paintable widgets” for a detailed description of this flag.
 

GTK_RECEIVES_DEFAULT

The widget when focused will receive the default action and have GTK_HAS_DEFAULT set even if there is a different widget set as default.

 

GTK_DOUBLE_BUFFERED

Set and unset by gtk_widget_set_double_buffered(). Indicates that exposes done on the widget should be double-buffered. See the section called “Double buffering” for a detailed discussion of how double-buffering works in GTK+ and why you may want to disable it for special cases.

 

GTK_NO_SHOW_ALL

   

struct GtkRequisition

struct GtkRequisition {
  gint width;
  gint height;
};

A GtkRequisition represents the desired size of a widget. See

??? for more information.

Members

gint width;

the widget's desired width

 

gint height;

the widget's desired height

 

GtkAllocation

typedef 	GdkRectangle	   GtkAllocation;

A GtkAllocation of a widget represents region which has been allocated to the widget by its parent. It is a subregion of its parents allocation. See

??? for more information.

GtkSelectionData

typedef struct {
  GdkAtom       GSEAL (selection);
  GdkAtom       GSEAL (target);
  GdkAtom       GSEAL (type);
  gint          GSEAL (format);
  guchar       *GSEAL (data);
  gint          GSEAL (length);
  GdkDisplay   *GSEAL (display);
} GtkSelectionData;

struct GtkWidgetAuxInfo

struct GtkWidgetAuxInfo {
  gint x;
  gint y;
  gint width;
  gint height;
  guint x_set : 1;
  guint y_set : 1;
};

struct GtkWidgetShapeInfo

struct GtkWidgetShapeInfo {
  gint16     offset_x;
  gint16     offset_y;
  GdkBitmap *shape_mask;
};

enum GtkWidgetHelpType

Members

GTK_WIDGET_HELP_TOOLTIP

   

GTK_WIDGET_HELP_WHATS_THIS

   

enum GtkTextDirection

GtkTextDirection is deprecated and should not be used in newly-written code.

Members

GTK_TEXT_DIR_NONE

   

GTK_TEXT_DIR_LTR

   

GTK_TEXT_DIR_RTL

   

Property Details

The “app-paintable” property

  “app-paintable”            gboolean

Whether the application will paint directly on the widget.

Flags: Read / Write

Default value: FALSE


The “can-default” property

  “can-default”              gboolean

Whether the widget can be the default widget.

Flags: Read / Write

Default value: FALSE


The “can-focus” property

  “can-focus”                gboolean

Whether the widget can accept the input focus.

Flags: Read / Write

Default value: FALSE


The “composite-child” property

  “composite-child”          gboolean

Whether the widget is part of a composite widget.

Flags: Read

Default value: FALSE


The “double-buffered” property

  “double-buffered”          gboolean

Whether or not the widget is double buffered.

Flags: Read / Write

Default value: TRUE

Since: 2.18


The “events” property

  “events”                   GdkEventMask

The event mask that decides what kind of GdkEvents this widget gets.

Flags: Read / Write

Default value: GDK_STRUCTURE_MASK


The “extension-events” property

  “extension-events”         GdkExtensionMode

The mask that decides what kind of extension events this widget gets.

Flags: Read / Write

Default value: GDK_EXTENSION_EVENTS_NONE


The “has-default” property

  “has-default”              gboolean

Whether the widget is the default widget.

Flags: Read / Write

Default value: FALSE


The “has-focus” property

  “has-focus”                gboolean

Whether the widget has the input focus.

Flags: Read / Write

Default value: FALSE


The “has-tooltip” property

  “has-tooltip”              gboolean

Enables or disables the emission of “query-tooltip” on widget . A value of TRUE indicates that widget can have a tooltip, in this case the widget will be queried using “query-tooltip” to determine whether it will provide a tooltip or not.

Note that setting this property to TRUE for the first time will change the event masks of the GdkWindows of this widget to include leave-notify and motion-notify events. This cannot and will not be undone when the property is set to FALSE again.

Flags: Read / Write

Default value: FALSE

Since: 2.12


The “height-request” property

  “height-request”           gint

Override for height request of the widget, or -1 if natural request should be used.

Flags: Read / Write

Allowed values: >= -1

Default value: -1


The “is-focus” property

  “is-focus”                 gboolean

Whether the widget is the focus widget within the toplevel.

Flags: Read / Write

Default value: FALSE


The “name” property

  “name”                     gchar *

The name of the widget.

Flags: Read / Write

Default value: NULL


The “no-show-all” property

  “no-show-all”              gboolean

Whether gtk_widget_show_all() should not affect this widget.

Flags: Read / Write

Default value: FALSE


The “parent” property

  “parent”                   GtkContainer *

The parent widget of this widget. Must be a Container widget.

Flags: Read / Write


The “receives-default” property

  “receives-default”         gboolean

If TRUE, the widget will receive the default action when it is focused.

Flags: Read / Write

Default value: FALSE


The “sensitive” property

  “sensitive”                gboolean

Whether the widget responds to input.

Flags: Read / Write

Default value: TRUE


The “style” property

  “style”                    GtkStyle *

The style of the widget, which contains information about how it will look (colors etc).

Flags: Read / Write


The “tooltip-markup” property

  “tooltip-markup”           gchar *

Sets the text of tooltip to be the given string, which is marked up with the Pango text markup language. Also see gtk_tooltip_set_markup().

This is a convenience property which will take care of getting the tooltip shown if the given string is not NULL: “has-tooltip” will automatically be set to TRUE and there will be taken care of “query-tooltip” in the default signal handler.

Flags: Read / Write

Default value: NULL

Since: 2.12


The “tooltip-text” property

  “tooltip-text”             gchar *

Sets the text of tooltip to be the given string.

Also see gtk_tooltip_set_text().

This is a convenience property which will take care of getting the tooltip shown if the given string is not NULL: “has-tooltip” will automatically be set to TRUE and there will be taken care of “query-tooltip” in the default signal handler.

Flags: Read / Write

Default value: NULL

Since: 2.12


The “visible” property

  “visible”                  gboolean

Whether the widget is visible.

Flags: Read / Write

Default value: FALSE


The “width-request” property

  “width-request”            gint

Override for width request of the widget, or -1 if natural request should be used.

Flags: Read / Write

Allowed values: >= -1

Default value: -1


The “window” property

  “window”                   GdkWindow *

The widget's window if it is realized, NULL otherwise.

Flags: Read

Since: 2.14

Style Property Details

The “cursor-aspect-ratio” style property

  “cursor-aspect-ratio”      gfloat

Aspect ratio with which to draw insertion cursor.

Flags: Read

Allowed values: [0,1]

Default value: 0.04


The “cursor-color” style property

  “cursor-color”             GdkColor *

Color with which to draw insertion cursor.

Flags: Read


The “draw-border” style property

  “draw-border”              GtkBorder *

The "draw-border" style property defines the size of areas outside the widget's allocation to draw.

GtkWidget:draw-border has been deprecated since version 2.22 and should not be used in newly-written code.

This property will be removed in GTK+ 3

Flags: Read

Since: 2.8


The “focus-line-pattern” style property

  “focus-line-pattern”       gchar *

Dash pattern used to draw the focus indicator.

Flags: Read

Default value: "\001\001"


The “focus-line-width” style property

  “focus-line-width”         gint

Width, in pixels, of the focus indicator line.

Flags: Read

Allowed values: >= 0

Default value: 1


The “focus-padding” style property

  “focus-padding”            gint

Width, in pixels, between focus indicator and the widget 'box'.

Flags: Read

Allowed values: >= 0

Default value: 1


The “interior-focus” style property

  “interior-focus”           gboolean

Whether to draw the focus indicator inside widgets.

Flags: Read

Default value: TRUE


The “link-color” style property

  “link-color”               GdkColor *

The "link-color" style property defines the color of unvisited links.

Flags: Read

Since: 2.10


The “scroll-arrow-hlength” style property

  “scroll-arrow-hlength”     gint

The "scroll-arrow-hlength" style property defines the length of horizontal scroll arrows.

Flags: Read

Allowed values: >= 1

Default value: 16

Since: 2.10


The “scroll-arrow-vlength” style property

  “scroll-arrow-vlength”     gint

The "scroll-arrow-vlength" style property defines the length of vertical scroll arrows.

Flags: Read

Allowed values: >= 1

Default value: 16

Since: 2.10


The “secondary-cursor-color” style property

  “secondary-cursor-color”   GdkColor *

Color with which to draw the secondary insertion cursor when editing mixed right-to-left and left-to-right text.

Flags: Read


The “separator-height” style property

  “separator-height”         gint

The "separator-height" style property defines the height of separators. This property only takes effect if “wide-separators” is TRUE.

Flags: Read

Allowed values: >= 0

Default value: 0

Since: 2.10


The “separator-width” style property

  “separator-width”          gint

The "separator-width" style property defines the width of separators. This property only takes effect if “wide-separators” is TRUE.

Flags: Read

Allowed values: >= 0

Default value: 0

Since: 2.10


The “tooltip-alpha” style property

  “tooltip-alpha”            guchar

The "tooltip-alpha" style property defines the opacity of widget tooltips.

Flags: Read

Default value: 255


The “tooltip-radius” style property

  “tooltip-radius”           guint

The "tooltip-radius" style property defines the radius of widget tooltips.

Flags: Read

Allowed values: <= G_MAXINT

Default value: 0


The “visited-link-color” style property

  “visited-link-color”       GdkColor *

The "visited-link-color" style property defines the color of visited links.

Flags: Read

Since: 2.10


The “wide-separators” style property

  “wide-separators”          gboolean

The "wide-separators" style property defines whether separators have configurable width and should be drawn using a box instead of a line.

Flags: Read

Default value: FALSE

Since: 2.10

Signal Details

The “accel-closures-changed” signal

void
user_function (GtkWidget *widget,
               gpointer   user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

The “button-press-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::button-press-event signal will be emitted when a button (typically from a mouse) is pressed.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_BUTTON_PRESS_MASK mask.

This signal will be sent to the grab widget if there is one.

Parameters

widget

the object which received the signal.

 

event

the GdkEventButton which triggered this signal.

[type Gdk.EventButton]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “button-release-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::button-release-event signal will be emitted when a button (typically from a mouse) is released.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_BUTTON_RELEASE_MASK mask.

This signal will be sent to the grab widget if there is one.

Parameters

widget

the object which received the signal.

 

event

the GdkEventButton which triggered this signal.

[type Gdk.EventButton]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “can-activate-accel” signal

gboolean
user_function (GtkWidget *widget,
               guint      signal_id,
               gpointer   user_data)

Determines whether an accelerator that activates the signal identified by signal_id can currently be activated. This signal is present to allow applications and derived widgets to override the default GtkWidget handling for determining whether an accelerator can be activated.

Parameters

widget

the object which received the signal

 

signal_id

the ID of a signal installed on widget

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE if the signal can be activated.

Flags: Run Last


The “child-notify” signal

void
user_function (GtkWidget  *widget,
               GParamSpec *pspec,
               gpointer    user_data)

The ::child-notify signal is emitted for each

child property that has

changed on an object. The signal's detail holds the property name.

Parameters

widget

the object which received the signal

 

pspec

the GParamSpec of the changed child property

 

user_data

user data set when the signal handler was connected.

 

Flags: No Hooks


The “client-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::client-event will be emitted when the widget 's window receives a message (via a ClientMessage event) from another application.

Parameters

widget

the object which received the signal

 

event

the GdkEventClient which triggered this signal.

[type Gdk.EventClient]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “composited-changed” signal

void
user_function (GtkWidget *widget,
               gpointer   user_data)

The ::composited-changed signal is emitted when the composited status of widget s screen changes. See gdk_screen_is_composited().

Parameters

widget

the object on which the signal is emitted

 

user_data

user data set when the signal handler was connected.

 

Flags: Action


The “configure-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::configure-event signal will be emitted when the size, position or stacking of the widget 's window has changed.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_STRUCTURE_MASK mask. GDK will enable this mask automatically for all new windows.

Parameters

widget

the object which received the signal

 

event

the GdkEventConfigure which triggered this signal.

[type Gdk.EventConfigure]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “damage-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

Emitted when a redirected window belonging to widget gets drawn into. The region/area members of the event shows what area of the redirected drawable was drawn into.

Parameters

widget

the object which received the signal

 

event

the GdkEventExpose event

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last

Since: 2.14


The “delete-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::delete-event signal is emitted if a user requests that a toplevel window is closed. The default handler for this signal destroys the window. Connecting gtk_widget_hide_on_delete() to this signal will cause the window to be hidden instead, so that it can later be shown again without reconstructing it.

Parameters

widget

the object which received the signal

 

event

the event which triggered this signal

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “destroy-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::destroy-event signal is emitted when a GdkWindow is destroyed. You rarely get this signal, because most widgets disconnect themselves from their window before they destroy it, so no widget owns the window at destroy time.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_STRUCTURE_MASK mask. GDK will enable this mask automatically for all new windows.

Parameters

widget

the object which received the signal.

 

event

the event which triggered this signal

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “direction-changed” signal

void
user_function (GtkWidget       *widget,
               GtkTextDirection previous_direction,
               gpointer         user_data)

The ::direction-changed signal is emitted when the text direction of a widget changes.

Parameters

widget

the object on which the signal is emitted

 

previous_direction

the previous text direction of widget

 

user_data

user data set when the signal handler was connected.

 

Flags: Run First


The “drag-begin” signal

void
user_function (GtkWidget      *widget,
               GdkDragContext *drag_context,
               gpointer        user_data)

The ::drag-begin signal is emitted on the drag source when a drag is started. A typical reason to connect to this signal is to set up a custom drag icon with gtk_drag_source_set_icon().

Note that some widgets set up a drag icon in the default handler of this signal, so you may have to use g_signal_connect_after() to override what the default handler did.

Parameters

widget

the object which received the signal

 

drag_context

the drag context

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “drag-data-delete” signal

void
user_function (GtkWidget      *widget,
               GdkDragContext *drag_context,
               gpointer        user_data)

The ::drag-data-delete signal is emitted on the drag source when a drag with the action GDK_ACTION_MOVE is successfully completed. The signal handler is responsible for deleting the data that has been dropped. What "delete" means depends on the context of the drag operation.

Parameters

widget

the object which received the signal

 

drag_context

the drag context

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “drag-data-get” signal

void
user_function (GtkWidget        *widget,
               GdkDragContext   *drag_context,
               GtkSelectionData *data,
               guint             info,
               guint             time,
               gpointer          user_data)

The ::drag-data-get signal is emitted on the drag source when the drop site requests the data which is dragged. It is the responsibility of the signal handler to fill data with the data in the format which is indicated by info . See gtk_selection_data_set() and gtk_selection_data_set_text().

Parameters

widget

the object which received the signal

 

drag_context

the drag context

 

data

the GtkSelectionData to be filled with the dragged data

 

info

the info that has been registered with the target in the GtkTargetList

 

time

the timestamp at which the data was requested

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “drag-data-received” signal

void
user_function (GtkWidget        *widget,
               GdkDragContext   *drag_context,
               gint              x,
               gint              y,
               GtkSelectionData *data,
               guint             info,
               guint             time,
               gpointer          user_data)

The ::drag-data-received signal is emitted on the drop site when the dragged data has been received. If the data was received in order to determine whether the drop will be accepted, the handler is expected to call gdk_drag_status() and not finish the drag. If the data was received in response to a “drag-drop” signal (and this is the last target to be received), the handler for this signal is expected to process the received data and then call gtk_drag_finish(), setting the success parameter depending on whether the data was processed successfully.

The handler may inspect and modify drag_context->action before calling gtk_drag_finish(), e.g. to implement GDK_ACTION_ASK as shown in the following example:

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void

drag_data_received (GtkWidget          *widget,
                    GdkDragContext     *drag_context,
                    gint                x,
                    gint                y,
                    GtkSelectionData   *data,
                    guint               info,
                    guint               time)
{
  if ((data->length >= 0) && (data->format == 8))
    {
      if (drag_context->action == GDK_ACTION_ASK)

        {
          GtkWidget *dialog;
          gint response;

          dialog = gtk_message_dialog_new (NULL,
                                           GTK_DIALOG_MODAL |

                                           GTK_DIALOG_DESTROY_WITH_PARENT,
                                           GTK_MESSAGE_INFO,
                                           GTK_BUTTONS_YES_NO,
                                           "Move the data ?\n");
          response = gtk_dialog_run (GTK_DIALOG (dialog));
          gtk_widget_destroy (dialog);

          if (response == GTK_RESPONSE_YES)
            drag_context->action = GDK_ACTION_MOVE;
          else
            drag_context->action = GDK_ACTION_COPY;
         }

      gtk_drag_finish (drag_context, TRUE, FALSE, time);
      return;
    }

   gtk_drag_finish (drag_context, FALSE, FALSE, time);
 }

Parameters

widget

the object which received the signal

 

drag_context

the drag context

 

x

where the drop happened

 

y

where the drop happened

 

data

the received data

 

info

the info that has been registered with the target in the GtkTargetList

 

time

the timestamp at which the data was received

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “drag-drop” signal

gboolean
user_function (GtkWidget      *widget,
               GdkDragContext *drag_context,
               gint            x,
               gint            y,
               guint           time,
               gpointer        user_data)

The ::drag-drop signal is emitted on the drop site when the user drops the data onto the widget. The signal handler must determine whether the cursor position is in a drop zone or not. If it is not in a drop zone, it returns FALSE and no further processing is necessary. Otherwise, the handler returns TRUE. In this case, the handler must ensure that gtk_drag_finish() is called to let the source know that the drop is done. The call to gtk_drag_finish() can be done either directly or in a “drag-data-received” handler which gets triggered by calling gtk_drag_get_data() to receive the data for one or more of the supported targets.

Parameters

widget

the object which received the signal

 

drag_context

the drag context

 

x

the x coordinate of the current cursor position

 

y

the y coordinate of the current cursor position

 

time

the timestamp of the motion event

 

returns

whether the cursor position is in a drop zone

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “drag-end” signal

void
user_function (GtkWidget      *widget,
               GdkDragContext *drag_context,
               gpointer        user_data)

The ::drag-end signal is emitted on the drag source when a drag is finished. A typical reason to connect to this signal is to undo things done in “drag-begin”.

Parameters

widget

the object which received the signal

 

drag_context

the drag context

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “drag-failed” signal

gboolean
user_function (GtkWidget      *widget,
               GdkDragContext *drag_context,
               GtkDragResult   result,
               gpointer        user_data)

The ::drag-failed signal is emitted on the drag source when a drag has failed. The signal handler may hook custom code to handle a failed DND operation based on the type of error, it returns TRUE is the failure has been already handled (not showing the default "drag operation failed" animation), otherwise it returns FALSE.

Parameters

widget

the object which received the signal

 

drag_context

the drag context

 

result

the result of the drag operation

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE if the failed drag operation has been already handled.

Flags: Run Last

Since: 2.12


The “drag-leave” signal

void
user_function (GtkWidget      *widget,
               GdkDragContext *drag_context,
               guint           time,
               gpointer        user_data)

The ::drag-leave signal is emitted on the drop site when the cursor leaves the widget. A typical reason to connect to this signal is to undo things done in “drag-motion”, e.g. undo highlighting with gtk_drag_unhighlight()

Parameters

widget

the object which received the signal.

 

drag_context

the drag context

 

time

the timestamp of the motion event

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “drag-motion” signal

gboolean
user_function (GtkWidget      *widget,
               GdkDragContext *drag_context,
               gint            x,
               gint            y,
               guint           time,
               gpointer        user_data)

The drag-motion signal is emitted on the drop site when the user moves the cursor over the widget during a drag. The signal handler must determine whether the cursor position is in a drop zone or not. If it is not in a drop zone, it returns FALSE and no further processing is necessary. Otherwise, the handler returns TRUE. In this case, the handler is responsible for providing the necessary information for displaying feedback to the user, by calling gdk_drag_status().

If the decision whether the drop will be accepted or rejected can't be made based solely on the cursor position and the type of the data, the handler may inspect the dragged data by calling gtk_drag_get_data() and defer the gdk_drag_status() call to the “drag-data-received” handler. Note that you cannot not pass GTK_DEST_DEFAULT_DROP, GTK_DEST_DEFAULT_MOTION or GTK_DEST_DEFAULT_ALL to gtk_drag_dest_set() when using the drag-motion signal that way.

Also note that there is no drag-enter signal. The drag receiver has to keep track of whether he has received any drag-motion signals since the last “drag-leave” and if not, treat the drag-motion signal as an "enter" signal. Upon an "enter", the handler will typically highlight the drop site with gtk_drag_highlight().

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static void
drag_motion (GtkWidget *widget,
             GdkDragContext *context,
             gint x,
             gint y,
             guint time)
{
  GdkAtom target;

  PrivateData *private_data = GET_PRIVATE_DATA (widget);

  if (!private_data->drag_highlight)

   {
     private_data->drag_highlight = 1;
     gtk_drag_highlight (widget);
   }

  target = gtk_drag_dest_find_target (widget, context, NULL);
  if (target == GDK_NONE)
    gdk_drag_status (context, 0, time);
  else

   {
     private_data->pending_status = context->suggested_action;
     gtk_drag_get_data (widget, context, target, time);
   }

  return TRUE;
}

static void
drag_data_received (GtkWidget        *widget,
                    GdkDragContext   *context,
                    gint              x,
                    gint              y,
                    GtkSelectionData *selection_data,
                    guint             info,
                    guint             time)
{
  PrivateData *private_data = GET_PRIVATE_DATA (widget);

  if (private_data->suggested_action)

   {
     private_data->suggested_action = 0;

    /* We are getting this data due to a request in drag_motion,
     * rather than due to a request in drag_drop, so we are just
     * supposed to call gdk_drag_status (), not actually paste in

     * the data.
     */
     str = gtk_selection_data_get_text (selection_data);
     if (!data_is_acceptable (str))

       gdk_drag_status (context, 0, time);
     else
       gdk_drag_status (context, private_data->suggested_action, time);
   }
  else
   {
     /* accept the drop */
   }
}

Parameters

widget

the object which received the signal

 

drag_context

the drag context

 

x

the x coordinate of the current cursor position

 

y

the y coordinate of the current cursor position

 

time

the timestamp of the motion event

 

returns

whether the cursor position is in a drop zone

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “enter-notify-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::enter-notify-event will be emitted when the pointer enters the widget 's window.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_ENTER_NOTIFY_MASK mask.

This signal will be sent to the grab widget if there is one.

Parameters

widget

the object which received the signal

 

event

the GdkEventCrossing which triggered this signal.

[type Gdk.EventCrossing]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The GTK+ main loop will emit three signals for each GDK event delivered to a widget: one generic ::event signal, another, more specific, signal that matches the type of event delivered (e.g. “key-press-event”) and finally a generic “event-after” signal.

Parameters

widget

the object which received the signal.

 

event

the GdkEvent which triggered this signal

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event and to cancel the emission of the second specific ::event signal. FALSE to propagate the event further and to allow the emission of the second signal. The ::event-after signal is emitted regardless of the return value.

Flags: Run Last


The “event-after” signal

void
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

After the emission of the “event” signal and (optionally) the second more specific signal, ::event-after will be emitted regardless of the previous two signals handlers return values.

Parameters

widget

the object which received the signal.

 

event

the GdkEvent which triggered this signal

 

user_data

user data set when the signal handler was connected.

 

The “expose-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::expose-event signal is emitted when an area of a previously obscured GdkWindow is made visible and needs to be redrawn. GTK_NO_WINDOW widgets will get a synthesized event from their parent widget.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_EXPOSURE_MASK mask.

Note that the ::expose-event signal has been replaced by a ::draw signal in GTK+ 3. The GTK+ 3 migration guide for hints on how to port from ::expose-event to ::draw.

Parameters

widget

the object which received the signal.

 

event

the GdkEventExpose which triggered this signal.

[type Gdk.EventExpose]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “focus” signal

gboolean
user_function (GtkWidget       *widget,
               GtkDirectionType direction,
               gpointer         user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “focus-in-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::focus-in-event signal will be emitted when the keyboard focus enters the widget 's window.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_FOCUS_CHANGE_MASK mask.

Parameters

widget

the object which received the signal

 

event

the GdkEventFocus which triggered this signal.

[type Gdk.EventFocus]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “focus-out-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::focus-out-event signal will be emitted when the keyboard focus leaves the widget 's window.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_FOCUS_CHANGE_MASK mask.

Parameters

widget

the object which received the signal

 

event

the GdkEventFocus which triggered this signal.

[type Gdk.EventFocus]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “grab-broken-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

Emitted when a pointer or keyboard grab on a window belonging to widget gets broken.

On X11, this happens when the grab window becomes unviewable (i.e. it or one of its ancestors is unmapped), or if the same application grabs the pointer or keyboard again.

Parameters

widget

the object which received the signal

 

event

the GdkEventGrabBroken event

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last

Since: 2.8


The “grab-focus” signal

void
user_function (GtkWidget *widget,
               gpointer   user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Action


The “grab-notify” signal

void
user_function (GtkWidget *widget,
               gboolean   was_grabbed,
               gpointer   user_data)

The ::grab-notify signal is emitted when a widget becomes shadowed by a GTK+ grab (not a pointer or keyboard grab) on another widget, or when it becomes unshadowed due to a grab being removed.

A widget is shadowed by a gtk_grab_add() when the topmost grab widget in the grab stack of its window group is not its ancestor.

Parameters

widget

the object which received the signal

 

was_grabbed

FALSE if the widget becomes shadowed, TRUE if it becomes unshadowed

 

user_data

user data set when the signal handler was connected.

 

Flags: Run First


The “hide” signal

void
user_function (GtkWidget *widget,
               gpointer   user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run First


The “hierarchy-changed” signal

void
user_function (GtkWidget *widget,
               GtkWidget *previous_toplevel,
               gpointer   user_data)

The ::hierarchy-changed signal is emitted when the anchored state of a widget changes. A widget is anchored when its toplevel ancestor is a GtkWindow. This signal is emitted when a widget changes from un-anchored to anchored or vice-versa.

Parameters

widget

the object on which the signal is emitted

 

previous_toplevel

the previous toplevel ancestor, or NULL if the widget was previously unanchored.

[allow-none]

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “key-press-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::key-press-event signal is emitted when a key is pressed.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_KEY_PRESS_MASK mask.

This signal will be sent to the grab widget if there is one.

Parameters

widget

the object which received the signal

 

event

the GdkEventKey which triggered this signal.

[type Gdk.EventKey]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “key-release-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::key-release-event signal is emitted when a key is pressed.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_KEY_RELEASE_MASK mask.

This signal will be sent to the grab widget if there is one.

Parameters

widget

the object which received the signal

 

event

the GdkEventKey which triggered this signal.

[type Gdk.EventKey]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “keynav-failed” signal

gboolean
user_function (GtkWidget       *widget,
               GtkDirectionType direction,
               gpointer         user_data)

Gets emitted if keyboard navigation fails. See gtk_widget_keynav_failed() for details.

Parameters

widget

the object which received the signal

 

direction

the direction of movement

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE if stopping keyboard navigation is fine, FALSE if the emitting widget should try to handle the keyboard navigation attempt in its parent container(s).

Flags: Run Last

Since: 2.12


The “leave-notify-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::leave-notify-event will be emitted when the pointer leaves the widget 's window.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_LEAVE_NOTIFY_MASK mask.

This signal will be sent to the grab widget if there is one.

Parameters

widget

the object which received the signal

 

event

the GdkEventCrossing which triggered this signal.

[type Gdk.EventCrossing]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “map” signal

void
user_function (GtkWidget *widget,
               gpointer   user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run First


The “map-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::map-event signal will be emitted when the widget 's window is mapped. A window is mapped when it becomes visible on the screen.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_STRUCTURE_MASK mask. GDK will enable this mask automatically for all new windows.

Parameters

widget

the object which received the signal

 

event

the GdkEventAny which triggered this signal.

[type Gdk.EventAny]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “mnemonic-activate” signal

gboolean
user_function (GtkWidget *widget,
               gboolean   arg1,
               gpointer   user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “motion-notify-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::motion-notify-event signal is emitted when the pointer moves over the widget's GdkWindow.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_POINTER_MOTION_MASK mask.

This signal will be sent to the grab widget if there is one.

Parameters

widget

the object which received the signal.

 

event

the GdkEventMotion which triggered this signal.

[type Gdk.EventMotion]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “move-focus” signal

void
user_function (GtkWidget       *widget,
               GtkDirectionType direction,
               gpointer         user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Action


The “no-expose-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::no-expose-event will be emitted when the widget 's window is drawn as a copy of another GdkDrawable (with gdk_draw_drawable() or gdk_window_copy_area()) which was completely unobscured. If the source window was partially obscured GdkEventExpose events will be generated for those areas.

Parameters

widget

the object which received the signal

 

event

the GdkEventNoExpose which triggered this signal.

[type Gdk.EventNoExpose]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “parent-set” signal

void
user_function (GtkWidget *widget,
               GtkWidget *old_parent,
               gpointer   user_data)

The ::parent-set signal is emitted when a new parent has been set on a widget.

Parameters

widget

the object on which the signal is emitted

 

old_parent

the previous parent, or NULL if the widget just got its initial parent.

[allow-none]

user_data

user data set when the signal handler was connected.

 

Flags: Run First


The “popup-menu” signal

gboolean
user_function (GtkWidget *widget,
               gpointer   user_data)

This signal gets emitted whenever a widget should pop up a context menu. This usually happens through the standard key binding mechanism; by pressing a certain key while a widget is focused, the user can cause the widget to pop up a menu. For example, the GtkEntry widget creates a menu with clipboard commands. See the section called “Implement GtkWidget::popup_menu” for an example of how to use this signal.

Parameters

widget

the object which received the signal

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE if a menu was activated

Flags: Action


The “property-notify-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::property-notify-event signal will be emitted when a property on the widget 's window has been changed or deleted.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_PROPERTY_CHANGE_MASK mask.

Parameters

widget

the object which received the signal

 

event

the GdkEventProperty which triggered this signal.

[type Gdk.EventProperty]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “proximity-in-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

To receive this signal the GdkWindow associated to the widget needs to enable the GDK_PROXIMITY_IN_MASK mask.

This signal will be sent to the grab widget if there is one.

Parameters

widget

the object which received the signal

 

event

the GdkEventProximity which triggered this signal.

[type Gdk.EventProximity]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “proximity-out-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

To receive this signal the GdkWindow associated to the widget needs to enable the GDK_PROXIMITY_OUT_MASK mask.

This signal will be sent to the grab widget if there is one.

Parameters

widget

the object which received the signal

 

event

the GdkEventProximity which triggered this signal.

[type Gdk.EventProximity]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “query-tooltip” signal

gboolean
user_function (GtkWidget  *widget,
               gint        x,
               gint        y,
               gboolean    keyboard_mode,
               GtkTooltip *tooltip,
               gpointer    user_data)

Emitted when “has-tooltip” is TRUE and the “gtk-tooltip-timeout” has expired with the cursor hovering "above" widget ; or emitted when widget got focus in keyboard mode.

Using the given coordinates, the signal handler should determine whether a tooltip should be shown for widget . If this is the case TRUE should be returned, FALSE otherwise. Note that if keyboard_mode is TRUE, the values of x and y are undefined and should not be used.

The signal handler is free to manipulate tooltip with the therefore destined function calls.

Parameters

widget

the object which received the signal

 

x

the x coordinate of the cursor position where the request has been emitted, relative to widget->window

 

y

the y coordinate of the cursor position where the request has been emitted, relative to widget->window

 

keyboard_mode

TRUE if the tooltip was trigged using the keyboard

 

tooltip

a GtkTooltip

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE if tooltip should be shown right now, FALSE otherwise.

Flags: Run Last

Since: 2.12


The “realize” signal

void
user_function (GtkWidget *widget,
               gpointer   user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run First


The “screen-changed” signal

void
user_function (GtkWidget *widget,
               GdkScreen *previous_screen,
               gpointer   user_data)

The ::screen-changed signal gets emitted when the screen of a widget has changed.

Parameters

widget

the object on which the signal is emitted

 

previous_screen

the previous screen, or NULL if the widget was not associated with a screen before.

[allow-none]

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “scroll-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::scroll-event signal is emitted when a button in the 4 to 7 range is pressed. Wheel mice are usually configured to generate button press events for buttons 4 and 5 when the wheel is turned.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_BUTTON_PRESS_MASK mask.

This signal will be sent to the grab widget if there is one.

Parameters

widget

the object which received the signal.

 

event

the GdkEventScroll which triggered this signal.

[type Gdk.EventScroll]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “selection-clear-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::selection-clear-event signal will be emitted when the the widget 's window has lost ownership of a selection.

Parameters

widget

the object which received the signal

 

event

the GdkEventSelection which triggered this signal.

[type Gdk.EventSelection]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “selection-get” signal

void
user_function (GtkWidget        *widget,
               GtkSelectionData *data,
               guint             info,
               guint             time,
               gpointer          user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “selection-notify-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “selection-received” signal

void
user_function (GtkWidget        *widget,
               GtkSelectionData *data,
               guint             time,
               gpointer          user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “selection-request-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::selection-request-event signal will be emitted when another client requests ownership of the selection owned by the widget 's window.

Parameters

widget

the object which received the signal

 

event

the GdkEventSelection which triggered this signal.

[type Gdk.EventSelection]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “show” signal

void
user_function (GtkWidget *widget,
               gpointer   user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run First


The “show-help” signal

gboolean
user_function (GtkWidget        *widget,
               GtkWidgetHelpType help_type,
               gpointer          user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Action


The “size-allocate” signal

void
user_function (GtkWidget    *widget,
               GdkRectangle *allocation,
               gpointer      user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run First


The “size-request” signal

void
user_function (GtkWidget      *widget,
               GtkRequisition *requisition,
               gpointer        user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run First


The “state-changed” signal

void
user_function (GtkWidget   *widget,
               GtkStateType state,
               gpointer     user_data)

The ::state-changed signal is emitted when the widget state changes. See gtk_widget_get_state().

Parameters

widget

the object which received the signal.

 

state

the previous state

 

user_data

user data set when the signal handler was connected.

 

Flags: Run First


The “style-set” signal

void
user_function (GtkWidget *widget,
               GtkStyle  *previous_style,
               gpointer   user_data)

The ::style-set signal is emitted when a new style has been set on a widget. Note that style-modifying functions like gtk_widget_modify_base() also cause this signal to be emitted.

Parameters

widget

the object on which the signal is emitted

 

previous_style

the previous style, or NULL if the widget just got its initial style.

[allow-none]

user_data

user data set when the signal handler was connected.

 

Flags: Run First


The “unmap” signal

void
user_function (GtkWidget *widget,
               gpointer   user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run First


The “unmap-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::unmap-event signal will be emitted when the widget 's window is unmapped. A window is unmapped when it becomes invisible on the screen.

To receive this signal, the GdkWindow associated to the widget needs to enable the GDK_STRUCTURE_MASK mask. GDK will enable this mask automatically for all new windows.

Parameters

widget

the object which received the signal

 

event

the GdkEventAny which triggered this signal.

[type Gdk.EventAny]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “unrealize” signal

void
user_function (GtkWidget *widget,
               gpointer   user_data)

Parameters

widget

the object which received the signal.

 

user_data

user data set when the signal handler was connected.

 

Flags: Run Last


The “visibility-notify-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::visibility-notify-event will be emitted when the widget 's window is obscured or unobscured.

To receive this signal the GdkWindow associated to the widget needs to enable the GDK_VISIBILITY_NOTIFY_MASK mask.

Parameters

widget

the object which received the signal

 

event

the GdkEventVisibility which triggered this signal.

[type Gdk.EventVisibility]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last


The “window-state-event” signal

gboolean
user_function (GtkWidget *widget,
               GdkEvent  *event,
               gpointer   user_data)

The ::window-state-event will be emitted when the state of the toplevel window associated to the widget changes.

To receive this signal the GdkWindow associated to the widget needs to enable the GDK_STRUCTURE_MASK mask. GDK will enable this mask automatically for all new windows.

Parameters

widget

the object which received the signal

 

event

the GdkEventWindowState which triggered this signal.

[type Gdk.EventWindowState]

user_data

user data set when the signal handler was connected.

 

Returns

TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further.

Flags: Run Last