gtkmm: Gdk::Window Class Reference

A Gdk::Window is a rectangular region on the screen. More...

#include <gdkmm/window.h>

Inheritance diagram for Gdk::Window:

Public Member Functions
	Window (Window&& src) noexcept

Window&	operator= (Window&& src) noexcept

	~Window () noexceptoverride

GdkWindow*	gobj ()
	Provides access to the underlying C GObject. More...

const GdkWindow*	gobj () const
	Provides access to the underlying C GObject. More...

GdkWindow*	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...

WindowType	get_window_type () const
	Gets the type of the window. More...

Glib::RefPtr< Visual >	get_visual ()
	Gets the Gdk::Visual describing the pixel format of window. More...

Glib::RefPtr< const Visual >	get_visual () const
	Gets the Gdk::Visual describing the pixel format of window. More...

Glib::RefPtr< Screen >	get_screen ()
	Gets the Gdk::Screen associated with a Gdk::Window. More...

Glib::RefPtr< const Screen >	get_screen () const
	Gets the Gdk::Screen associated with a Gdk::Window. More...

Glib::RefPtr< Display >	get_display ()
	Gets the Gdk::Display associated with a Gdk::Window. More...

Glib::RefPtr< const Display >	get_display () const
	Gets the Gdk::Display associated with a Gdk::Window. More...

void	show ()
	Like show_unraised(), but also raises the window to the top of the window stack (moves the window to the front of the Z-order). More...

void	hide ()
	For toplevel windows, withdraws them, so they will no longer be known to the window manager; for all windows, unmaps them, so they won’t be displayed. More...

void	withdraw ()
	Withdraws a window (unmaps it and asks the window manager to forget about it). More...

void	show_unraised ()
	Shows a Gdk::Window onscreen, but does not modify its stacking order. More...

void	move (int x, int y)
	Repositions a window relative to its parent window. More...

void	resize (int width, int height)
	Resizes window; for toplevel windows, asks the window manager to resize the window. More...

void	move_resize (int x, int y, int width, int height)
	Equivalent to calling move() and resize(), except that both operations are performed at once, avoiding strange visual effects. More...

void	reparent (const Glib::RefPtr< Window >& new_parent, int x, int y)
	Reparents window into the given new_parent. More...

void	raise ()
	Raises window to the top of the Z-order (stacking order), so that other windows with the same parent window appear below window. More...

void	lower ()
	Lowers window to the bottom of the Z-order (stacking order), so that other windows with the same parent window appear above window. More...

void	restack (const Glib::RefPtr< Window >& sibling, bool above)
	Changes the position of window in the Z-order (stacking order), so that it is above sibling (if above is `true`) or below sibling (if above is `false`). More...

void	restack (bool above)
	Changes the position of this window in the Z-order (stacking order). More...

void	focus (guint32 timestamp)
	Sets keyboard focus to window. More...

void	set_user_data (gpointer user_data)
	For most purposes this function is deprecated in favor of Glib::object_set_data(). More...

void	set_override_redirect (bool override_redirect=true)
	An override redirect window is not under the control of the window manager. More...

void	add_filter (GdkFilterFunc function, gpointer data)
	Adds an event filter to window, allowing you to intercept events before they reach GDK. More...

void	remove_filter (GdkFilterFunc function, gpointer data)
	Remove a filter previously added with add_filter(). More...

void	scroll (int dx, int dy)
	Scroll the contents of window, both pixels and children, by the given amount. More...

void	move_region (const ::Cairo::RefPtr< ::Cairo::Region >& region, int dx, int dy)
	Move the part of window indicated by region by dy pixels in the Y direction and dx pixels in the X direction. More...

bool	ensure_native ()
	Tries to ensure that there is a window-system native window for this GdkWindow. More...

void	shape_combine_region (const ::Cairo::RefPtr< ::Cairo::Region >& shape_region, int offset_x=0, int offset_y=0)
	Makes pixels in window outside shape_region be transparent, so that the window may be nonrectangular. More...

void	set_child_shapes ()
	Sets the shape mask of window to the union of shape masks for all children of window, ignoring the shape mask of window itself. More...

bool	get_composited () const
	Determines whether window is composited. More...

void	set_composited (bool composited=TRUE)
	Sets a Gdk::Window as composited, or unsets it. More...

void	merge_child_shapes ()
	Merges the shape masks for any child windows into the shape mask for window. More...

void	input_shape_combine_region (const ::Cairo::RefPtr< ::Cairo::Region >& shape_region, int offset_x, int offset_y)
	Like shape_combine_region(), but the shape applies only to event handling. More...

void	set_child_input_shapes ()
	Sets the input shape mask of window to the union of input shape masks for all children of window, ignoring the input shape mask of window itself. More...

void	merge_child_input_shapes ()
	Merges the input shape masks for any child windows into the input shape mask for window. More...

void	set_pass_through (bool pass_through=true)
	Sets whether input to the window is passed through to the window below. More...

bool	get_pass_through () const
	Returns whether input to the window is passed through to the window below. More...

bool	is_visible () const
	Checks whether the window has been mapped (with show() or show_unraised()). More...

bool	is_viewable () const
	Check if the window and all ancestors of the window are mapped. More...

bool	is_input_only () const
	Determines whether or not the window is an input only window. More...

bool	is_shaped () const
	Determines whether or not the window is shaped. More...

WindowState	get_state () const
	Gets the bitwise OR of the currently active window state flags, from the Gdk::WindowState enumeration. More...

bool	set_static_gravities (bool use_static=true)
	Used to set the bit gravity of the given window to static, and flag it so all children get static subwindow gravity. More...

bool	has_native () const
	Checks whether the window has a native window or not. More...

void	set_type_hint (WindowTypeHint hint)
	The application can use this call to provide a hint to the window manager about the functionality of a window. More...

WindowTypeHint	get_type_hint ()
	This function returns the type hint set for a window. More...

bool	get_modal_hint () const
	Determines whether or not the window manager is hinted that window has modal behaviour. More...

void	set_modal_hint (bool modal=true)
	The application can use this hint to tell the window manager that a certain window has modal behaviour. More...

void	set_geometry_hints (const Geometry& geometry, WindowHints geom_mask)
	Sets the geometry hints for window. More...

void	begin_paint_rect (const Rectangle& rectangle)
	A convenience wrapper around begin_paint_region() which creates a rectangular region for you. More...

void	begin_paint_region (const ::Cairo::RefPtr< ::Cairo::Region >& region)
	Indicates that you are beginning the process of redrawing region. More...

void	end_paint ()
	Indicates that the backing store created by the most recent call to begin_paint_region() should be copied onscreen and deleted, leaving the next-most-recent backing store or no backing store at all as the active paint region. More...

void	flush ()
	This function does nothing. More...

void	set_title (const Glib::ustring& title)
	Sets the title of a toplevel window, to be displayed in the titlebar. More...

void	set_role (const Glib::ustring& role)
	When using GTK+, typically you should use gtk_window_set_role() instead of this low-level function. More...

void	set_startup_id (const Glib::ustring& startup_id)
	When using GTK+, typically you should use gtk_window_set_startup_id() instead of this low-level function. More...

void	set_transient_for (const Glib::RefPtr< Window >& parent)
	Indicates to the window manager that window is a transient dialog associated with the application window parent. More...

void	set_background (const Color& color)
	Sets the background color of window. More...

void	set_background (const RGBA& rgba)
	Sets the background color of window. More...

void	set_background (const ::Cairo::RefPtr< ::Cairo::Pattern >& pattern)
	Sets the background of window. More...

::Cairo::RefPtr< ::Cairo::Pattern >	get_background_pattern ()
	Gets the pattern used to clear the background on window. More...

::Cairo::RefPtr< const ::Cairo::Pattern >	get_background_pattern () const
	Gets the pattern used to clear the background on window. More...

void	set_cursor (const Glib::RefPtr< Cursor >& cursor)
	Sets the mouse pointer for a Gdk::Window. More...

void	set_cursor ()
	Use the parent window's cursor. More...

void	set_device_cursor (const Glib::RefPtr< Device >& device, const Glib::RefPtr< Cursor >& cursor)
	Sets a specific Gdk::Cursor for a given device when it gets inside window. More...

void	set_device_cursor (const Glib::RefPtr< Device >& device)
	Use the parent window's cursor. More...

Glib::RefPtr< Cursor >	get_device_cursor (const Glib::RefPtr< Device >& device)
	Retrieves a Gdk::Cursor pointer for the device currently set on the specified Gdk::Window, or `nullptr`. More...

Glib::RefPtr< const Cursor >	get_device_cursor (const Glib::RefPtr< const Device >& device) const
	Retrieves a Gdk::Cursor pointer for the device currently set on the specified Gdk::Window, or `nullptr`. More...

Glib::RefPtr< Cursor >	get_cursor ()
	Retrieves a Gdk::Cursor pointer for the cursor currently set on the specified Gdk::Window, or `nullptr`. More...

Glib::RefPtr< const Cursor >	get_cursor () const
	Retrieves a Gdk::Cursor pointer for the cursor currently set on the specified Gdk::Window, or `nullptr`. More...

void	get_user_data (gpointer* data)
	Retrieves the user data for window, which is normally the widget that window belongs to. More...

void	get_geometry (int& x, int& y, int& width, int& height) const
	Any of the return location arguments to this function may be `nullptr`, if you aren’t interested in getting the value of that field. More...

int	get_width () const
	Returns the width of the given window. More...

int	get_height () const
	Returns the height of the given window. More...

void	get_position (int& x, int& y) const
	Obtains the position of the window as reported in the most-recently-processed Gdk::EventConfigure. More...

int	get_origin (int& x, int& y) const
	Obtains the position of a window in root window coordinates. More...

void	get_root_coords (int x, int y, int& root_x, int& root_y)
	Obtains the position of a window position in root window coordinates. More...

void	coords_to_parent (double x, double y, double& parent_x, double& parent_y)
	Transforms window coordinates from a child window to its parent window, where the parent window is the normal parent as returned by get_parent() for normal windows, and the window's embedder as returned by Gdk::OffscreenWindow::get_embedder() for offscreen windows. More...

void	coords_from_parent (double parent_x, double parent_y, double& x, double& y)
	Transforms window coordinates from a parent window to a child window, where the parent window is the normal parent as returned by get_parent() for normal windows, and the window's embedder as returned by Gdk::OffscreenWindow::get_embedder() for offscreen windows. More...

void	get_root_origin (int& x, int& y) const
	Obtains the top-left corner of the window manager frame in root window coordinates. More...

void	get_frame_extents (Rectangle& rect)
	Obtains the bounding box of the window, including window manager titlebar/borders if any. More...

void	get_frame_extents (Rectangle& rect) const
	Obtains the bounding box of the window, including window manager titlebar/borders if any. More...

int	get_scale_factor () const
	Returns the internal scale factor that maps from window coordiantes to the actual device pixels. More...

Glib::RefPtr< Window >	get_pointer (int& x, int& y, ModifierType& mask)
	Obtains the current pointer position and modifier state. More...

Glib::RefPtr< Window >	get_parent ()
	Obtains the parent of window, as known to GDK. More...

Glib::RefPtr< const Window >	get_parent () const
	Obtains the parent of window, as known to GDK. More...

Glib::RefPtr< Window >	get_toplevel ()
	Gets the toplevel window that’s an ancestor of window. More...

Glib::RefPtr< const Window >	get_toplevel () const
	Gets the toplevel window that’s an ancestor of window. More...

Glib::RefPtr< Window >	get_device_position (const Glib::RefPtr< const Device >& device, int& x, int& y, ModifierType& mask) const
	Obtains the current device position and modifier state. More...

Glib::RefPtr< Window >	get_device_position (const Glib::RefPtr< const Device >& device, double& x, double& y, ModifierType& mask) const
	Obtains the current device position in doubles and modifier state. More...

Glib::RefPtr< Window >	get_effective_parent ()
	Obtains the parent of window, as known to GDK. More...

Glib::RefPtr< const Window >	get_effective_parent () const
	Obtains the parent of window, as known to GDK. More...

Glib::RefPtr< Window >	get_effective_toplevel ()
	Gets the toplevel window that’s an ancestor of window. More...

Glib::RefPtr< const Window >	get_effective_toplevel () const
	Gets the toplevel window that’s an ancestor of window. More...

std::vector< Glib::RefPtr< Window > >	get_children ()
	Gets the list of children of window known to GDK. More...

std::vector< Glib::RefPtr< const Window > >	get_children () const
	Gets the list of children of window known to GDK. More...

EventMask	get_events () const
	Gets the event mask for window for all master input devices. More...

void	set_events (EventMask event_mask)
	The event mask for a window determines which events will be reported for that window from all master input devices. More...

EventMask	get_device_events (const Glib::RefPtr< const Device >& device) const
	Returns the event mask for window corresponding to an specific device. More...

void	set_device_events (const Glib::RefPtr< Device >& device, EventMask event_mask)
	Sets the event mask for a given device (Normally a floating device, not attached to any visible pointer) to window. More...

EventMask	get_source_events (InputSource source) const
	Returns the event mask for window corresponding to the device class specified by source. More...

void	set_source_events (InputSource source, EventMask event_mask)
	Sets the event mask for any floating device (i.e. not attached to any visible pointer) that has the source defined as source. More...

void	set_icon_list (const std::vector< Glib::RefPtr< Gdk::Pixbuf > >& pixbufs)
	Sets a list of icons for the window. More...

void	unset_icon ()

void	set_icon_name (const Glib::ustring& name)
	Windows may have a name used while minimized, distinct from the name they display in their titlebar. More...

void	set_group (const Glib::RefPtr< Window >& leader)
	Sets the group leader window for window. More...

Glib::RefPtr< Window >	get_group ()
	Returns the group leader window for window. More...

Glib::RefPtr< const Window >	get_group () const
	Returns the group leader window for window. More...

void	set_decorations (WMDecoration decorations)
	“Decorations” are the features the window manager adds to a toplevel Gdk::Window. More...

bool	get_decorations (WMDecoration& decorations) const
	Returns the decorations set on the GdkWindow with set_decorations(). More...

void	set_functions (WMFunction functions)
	Sets hints about the window management functions to make available via buttons on the window frame. More...

::Cairo::RefPtr< ::Cairo::Surface >	create_similar_surface (::Cairo::Content content, int width, int height)
	Create a new surface that is as compatible as possible with the given window. More...

::Cairo::RefPtr< ::Cairo::Surface >	create_similar_image_surface (::Cairo::Format format, int width, int height, int scale)
	Create a new image surface that is efficient to draw on the given window. More...

void	beep ()
	Emits a short beep associated to window in the appropriate display, if supported. More...

void	iconify ()
	Asks to iconify (minimize) window. More...

void	deiconify ()
	Attempt to deiconify (unminimize) window. More...

void	stick ()
	“Pins” a window such that it’s on all workspaces and does not scroll with viewports, for window managers that have scrollable viewports. More...

void	unstick ()
	Reverse operation for stick(); see stick(), and gtk_window_unstick(). More...

void	maximize ()
	Maximizes the window. More...

void	unmaximize ()
	Unmaximizes the window. More...

void	register_dnd ()
	Registers a window as a potential drop destination. More...

DragProtocol	get_drag_protocol (Glib::RefPtr< Window >& target) const
	Finds out the DND protocol supported by a window. More...

DragProtocol	get_drag_protocol () const
	Finds out the DND protocol supported by a window. More...

void	begin_resize_drag (WindowEdge edge, int button, int root_x, int root_y, guint32 timestamp)
	Begins a window resize operation (for a toplevel window). More...

void	resize_drag (WindowEdge edge, const Glib::RefPtr< Device >& device, int button, int root_x, int root_y, guint32 timestamp)
	Begins a window resize operation (for a toplevel window). More...

void	begin_move_drag (int button, int root_x, int root_y, guint32 timestamp)
	Begins a window move operation (for a toplevel window). More...

void	begin_move_drag (const Glib::RefPtr< Device >& device, int button, int root_x, int root_y, guint32 timestamp)
	Begins a window move operation (for a toplevel window). More...

Glib::RefPtr< DragContext >	drag_begin (const std::vector< Glib::ustring >& targets)
	Starts a drag and creates a new drag context for it. More...

void	invalidate_rect (const Rectangle& rect, bool invalidate_children)
	A convenience wrapper around invalidate_region() which invalidates a rectangular region. More...

void	invalidate (bool invalidate_children)
	A convenience wrapper around invalidate_region() which invalidates the whole region. More...

void	invalidate_region (const ::Cairo::RefPtr< ::Cairo::Region >& region, bool invalidate_children=true)
	Adds region to the update area for window. More...

::Cairo::RefPtr< ::Cairo::Region >	get_update_area ()
	Transfers ownership of the update area from window to the caller of the function. More...

void	freeze_updates ()
	Temporarily freezes a window such that it won’t receive expose events. More...

void	thaw_updates ()
	Thaws a window frozen with freeze_updates(). More...

void	process_updates (bool update_children)
	Sends one or more expose events to window. More...

void	enable_synchronized_configure ()
	Does nothing, present only for compatiblity. More...

void	configure_finished ()
	Does nothing, present only for compatiblity. More...

void	set_skip_taskbar_hint (bool skips_taskbar=true)
	Toggles whether a window should appear in a task list or window list. More...

void	set_skip_pager_hint (bool skips_pager=true)
	Toggles whether a window should appear in a pager (workspace switcher, or other desktop utility program that displays a small thumbnail representation of the windows on the desktop). More...

void	set_urgency_hint (bool urgent=true)
	Toggles whether a window needs the user's urgent attention. More...

void	fullscreen ()
	Moves the window into fullscreen mode. More...

void	set_fullscreen_mode (FullscreenMode mode)
	Specifies whether the window should span over all monitors (in a multi-head setup) or only the current monitor when in fullscreen mode. More...

FullscreenMode	get_fullscreen_mode () const
	Obtains the Gdk::FullscreenMode of the window. More...

void	unfullscreen ()
	Moves the window out of fullscreen mode. More...

void	set_keep_above (bool setting=true)
	Set if window must be kept above other windows. More...

void	set_keep_below (bool setting=true)
	Set if window must be kept below other windows. More...

void	set_opacity (double opacity)
	Set window to render as partially transparent, with opacity 0 being fully transparent and 1 fully opaque. More...

bool	get_accept_focus () const
	Determines whether or not the desktop environment shuld be hinted that the window does not want to receive input focus. More...

void	set_accept_focus (bool accept_focus=true)
	Setting accept_focus to `false` hints the desktop environment that the window doesn’t want to receive input focus. More...

bool	get_focus_on_map () const
	Determines whether or not the desktop environment should be hinted that the window does not want to receive input focus when it is mapped. More...

void	set_focus_on_map (bool focus_on_map)
	Setting focus_on_map to `false` hints the desktop environment that the window doesn’t want to receive input focus when it is mapped. More...

::Cairo::RefPtr< ::Cairo::Surface >	get_offscreen_surface ()
	Gets the offscreen surface that an offscreen window renders into. More...

::Cairo::RefPtr< const ::Cairo::Surface >	get_offscreen_surface () const
	Gets the offscreen surface that an offscreen window renders into. More...

Glib::RefPtr< Window >	get_offscreen_embedder ()
	Gets the window that window is embedded in. More...

Glib::RefPtr< const Window >	get_offscreen_embedder () const
	Gets the window that window is embedded in. More...

void	set_offscreen_embedder (const Glib::RefPtr< Window >& embedder)
	Sets window to be embedded in embedder. More...

void	geometry_changed ()
	This function informs GDK that the geometry of an embedded offscreen window has changed. More...

void	set_support_multidevice (bool support_multidevice=true)
	This function will enable multidevice features in window. More...

bool	get_support_multidevice ()
	Returns `true` if the window is aware of the existence of multiple devices. More...

::Cairo::RefPtr< ::Cairo::Region >	get_clip_region () const
	Computes the region of a window that potentially can be written to by drawing primitives. More...

::Cairo::RefPtr< ::Cairo::Region >	get_visible_region () const
	Computes the region of the window that is potentially visible. More...

::Cairo::RefPtr< ::Cairo::Context >	create_cairo_context ()
	Creates a Cairo context for drawing to drawable. More...

void	set_opaque_region (const ::Cairo::RefPtr< const ::Cairo::Region >& region)
	For optimisation purposes, compositing window managers may like to not draw obscured regions of windows, or turn off blending during for these regions. More...

void	set_event_compression (bool event_compression=true)
	Determines whether or not extra unprocessed motion events in the event queue can be discarded. More...

bool	get_event_compression () const
	Get the current event compression setting for this window. More...

void	set_shadow_width (int left, int right, int top, int bottom)
	Newer GTK+ windows using client-side decorations use extra geometry around their frames for effects like shadows and invisible borders. More...

bool	show_window_menu (GdkEvent* event)
	Asks the windowing system to show the window menu. More...

Glib::RefPtr< Gdk::GLContext >	create_gl_context ()
	Creates a new GLContext matching the framebuffer format to the visual of the Window. More...

Glib::RefPtr< DrawingContext >	begin_draw_frame (const ::Cairo::RefPtr< const ::Cairo::Region >& region)
	Indicates that you are beginning the process of redrawing region on window, and provides you with a Gdk::DrawingContext. More...

void	end_draw_frame (const Glib::RefPtr< DrawingContext >& context)
	Indicates that the drawing of the contents of window started with gdk_window_begin_frame() has been completed. More...

Glib::PropertyProxy< Glib::RefPtr< Cursor > >	property_cursor ()
	The mouse pointer for a Gdk::Window. More...

Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Cursor > >	property_cursor () const
	The mouse pointer for a Gdk::Window. More...

Public Member Functions inherited from Glib::Object
	Object (const Object &)=delete

Object &	operator= (const Object &)=delete

	Object (Object &&src) noexcept

Object &	operator= (Object &&src) noexcept

void *	get_data (const QueryQuark &key)

void	set_data (const Quark &key, void *data)

void	set_data (const Quark &key, void *data, DestroyNotify notify)

void	remove_data (const QueryQuark &quark)

void *	steal_data (const QueryQuark &quark)

Glib::RefPtr< Glib::Object >	wrap (GObject *object, bool take_copy=false)

Public Member Functions inherited from Glib::ObjectBase
	ObjectBase (const ObjectBase &)=delete

ObjectBase &	operator= (const ObjectBase &)=delete

void	set_property_value (const Glib::ustring &property_name, const Glib::ValueBase &value)

void	get_property_value (const Glib::ustring &property_name, Glib::ValueBase &value) const

void	set_property (const Glib::ustring &property_name, const PropertyType &value)

void	get_property (const Glib::ustring &property_name, PropertyType &value) const

void	connect_property_changed (const Glib::ustring &property_name, const sigc::slot< void > &slot)

void	connect_property_changed (const Glib::ustring &property_name, sigc::slot< void > &&slot)

sigc::connection	connect_property_changed_with_return (const Glib::ustring &property_name, const sigc::slot< void > &slot)

sigc::connection	connect_property_changed_with_return (const Glib::ustring &property_name, sigc::slot< void > &&slot)

void	freeze_notify ()

void	thaw_notify ()

virtual void	reference () const

virtual void	unreference () const

GObject *	gobj ()

const GObject *	gobj () const

GObject *	gobj_copy () const

Public Member Functions inherited from sigc::trackable
	trackable () noexcept

	trackable (const trackable &src) noexcept

	trackable (trackable &&src)

	~trackable ()

void	add_destroy_notify_callback (void *data, func_destroy_notify func) const

void	notify_callbacks ()

trackable &	operator= (const trackable &src)

trackable &	operator= (trackable &&src)

void	remove_destroy_notify_callback (void *data) const

Static Public Member Functions
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system. More...

static Glib::RefPtr< Window >	create (const Glib::RefPtr< Window >& parent, GdkWindowAttr* attributes, int attributes_mask)

static void	process_all_updates ()
	Calls process_updates() for all windows (see Gdk::Window) in the application. More...

static void	set_debug_updates (bool setting=true)
	With update debugging enabled, calls to invalidate_region() clear the invalidated region of the screen to a noticeable color, and GDK pauses for a short time before sending exposes to windows during process_updates(). More...

static void	constrain_size (const Geometry& geometry, guint flags, int width, int height, int& new_width, int& new_height)
	Constrains a desired width and height according to a set of geometry hints (such as minimum and maximum size). More...

static Glib::RefPtr< Window >	get_default_root_window ()
	Obtains the root window (parent all other windows are inside) for the default display and screen. More...

Protected Member Functions
	Window (const Glib::RefPtr< Window >& parent, GdkWindowAttr* attributes, int attributes_mask)

Protected Member Functions inherited from Glib::Object
	Object ()

	Object (const Glib::ConstructParams &construct_params)

	Object (GObject *castitem)

	~Object () noexceptoverride

Protected Member Functions inherited from Glib::ObjectBase
	ObjectBase ()

	ObjectBase (const char *custom_type_name)

	ObjectBase (const std::type_info &custom_type_info)

	ObjectBase (ObjectBase &&src) noexcept

ObjectBase &	operator= (ObjectBase &&src) noexcept

virtual	~ObjectBase () noexcept=0

void	initialize (GObject *castitem)

void	initialize_move (GObject castitem, Glib::ObjectBase previous_wrapper)

Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Gdk::Window >	wrap (GdkWindow* object, bool take_copy=false)
	A Glib::wrap() method for this object. More...

Additional Inherited Members
Public Types inherited from Glib::Object
typedef void(*)(gpointer data	DestroyNotify)

Public Types inherited from sigc::trackable
typedef internal::func_destroy_notify	func_destroy_notify

Detailed Description

A Gdk::Window is a rectangular region on the screen.

It's a low-level object, used to implement high-level objects such as Gtk::Widget and Gtk::Window on the GTK+ level. A Gtk::Window is a toplevel window, the thing a user might think of as a "window" with a titlebar and so on; a Gtk::Window may contain many Gdk::Windows. For example, each Gtk::Button has a Gdk::Window associated with it.

Constructor & Destructor Documentation

Gdk::Window::Window ( Window&& src )

noexcept

Gdk::Window::~Window ( )

overridenoexcept

Gdk::Window::Window	(	const Glib::RefPtr< Window >&	parent,
		GdkWindowAttr *	attributes,
		int	attributes_mask
	)

protected

Member Function Documentation

void Gdk::Window::add_filter	(	GdkFilterFunc	function,
		gpointer	data
	)

Adds an event filter to window, allowing you to intercept events before they reach GDK.

This is a low-level operation and makes it easy to break GDK and/or GTK+, so you have to know what you're doing. Pass nullptr for window to get all events for all windows, instead of events for a specific window.

If you are interested in X GenericEvents, bear in mind that XGetEventData() has been already called on the event, and XFreeEventData() must not be called within function.

Parameters

function	Filter callback.
data	Data to pass to filter callback.

void Gdk::Window::beep ( )

Emits a short beep associated to window in the appropriate display, if supported.

Otherwise, emits a short beep on the display just as Gdk::Display::beep().

Since gtkmm 2.12:

Glib::RefPtr<DrawingContext> Gdk::Window::begin_draw_frame ( const ::Cairo::RefPtr< const ::Cairo::Region > & region )

Indicates that you are beginning the process of redrawing region on window, and provides you with a Gdk::DrawingContext.

If window is a top level Gdk::Window, backed by a native window implementation, a backing store (offscreen buffer) large enough to contain region will be created. The backing store will be initialized with the background color or background surface for window. Then, all drawing operations performed on window will be diverted to the backing store. When you call gdk_window_end_frame(), the contents of the backing store will be copied to window, making it visible on screen. Only the part of window contained in region will be modified; that is, drawing operations are clipped to region.

The net result of all this is to remove flicker, because the user sees the finished product appear all at once when you call end_draw_frame(). If you draw to window directly without calling begin_draw_frame(), the user may see flicker as individual drawing operations are performed in sequence.

When using GTK+, the widget system automatically places calls to begin_draw_frame() and end_draw_frame() around emissions of the GtkWidget::draw signal. That is, if you’re drawing the contents of the widget yourself, you can assume that the widget has a cleared background, is already set as the clip region, and already has a backing store. Therefore in most cases, application code in GTK does not need to call begin_draw_frame() explicitly.

Since gtkmm 3.22:

Parameters

region A Cairo region.

Returns: A Gdk::DrawingContext context that should be used to draw the contents of the window; the returned context is owned by GDK.

void Gdk::Window::begin_move_drag	(	int	button,
		int	root_x,
		int	root_y,
		guint32	timestamp
	)

Begins a window move operation (for a toplevel window).

This function assumes that the drag is controlled by the client pointer device, use begin_move_drag_for_device() to begin a drag with a different device.

Parameters

button	The button being used to drag, or 0 for a keyboard-initiated drag.
root_x	Root window X coordinate of mouse click that began the drag.
root_y	Root window Y coordinate of mouse click that began the drag.
timestamp	Timestamp of mouse click that began the drag.

void Gdk::Window::begin_move_drag	(	const Glib::RefPtr< Device >&	device,
		int	button,
		int	root_x,
		int	root_y,
		guint32	timestamp
	)

Begins a window move operation (for a toplevel window).

You might use this function to implement a “window move grip,” for example. The function works best with window managers that support the Extended Window Manager Hints but has a fallback implementation for other window managers.

Since gtkmm 3.4:

Parameters

device	The device used for the operation.
button	The button being used to drag, or 0 for a keyboard-initiated drag.
root_x	Root window X coordinate of mouse click that began the drag.
root_y	Root window Y coordinate of mouse click that began the drag.
timestamp	Timestamp of mouse click that began the drag.

void Gdk::Window::begin_paint_rect ( const Rectangle& rectangle )

A convenience wrapper around begin_paint_region() which creates a rectangular region for you.

See begin_paint_region() for details.

Deprecated: 3.22: Use begin_draw_frame() instead

Deprecated:: Use begin_draw_frame() instead.

Parameters

rectangle Rectangle you intend to draw to.

void Gdk::Window::begin_paint_region ( const ::Cairo::RefPtr< ::Cairo::Region > & region )

Indicates that you are beginning the process of redrawing region.

A backing store (offscreen buffer) large enough to contain region will be created. The backing store will be initialized with the background color or background surface for window. Then, all drawing operations performed on window will be diverted to the backing store. When you call end_paint(), the backing store will be copied to window, making it visible onscreen. Only the part of window contained in region will be modified; that is, drawing operations are clipped to region.

The net result of all this is to remove flicker, because the user sees the finished product appear all at once when you call end_paint(). If you draw to window directly without calling begin_paint_region(), the user may see flicker as individual drawing operations are performed in sequence. The clipping and background-initializing features of begin_paint_region() are conveniences for the programmer, so you can avoid doing that work yourself.

When using GTK+, the widget system automatically places calls to begin_paint_region() and end_paint() around emissions of the expose_event signal. That is, if you’re writing an expose event handler, you can assume that the exposed area in Gdk::EventExpose has already been cleared to the window background, is already set as the clip region, and already has a backing store. Therefore in most cases, application code need not call begin_paint_region(). (You can disable the automatic calls around expose events on a widget-by-widget basis by calling gtk_widget_set_double_buffered().)

If you call this function multiple times before calling the matching end_paint(), the backing stores are pushed onto a stack. end_paint() copies the topmost backing store onscreen, subtracts the topmost region from all other regions in the stack, and pops the stack. All drawing operations affect only the topmost backing store in the stack. One matching call to end_paint() is required for each call to begin_paint_region().

Deprecated: 3.22: Use begin_draw_frame() instead

Deprecated:: Use begin_draw_frame() instead.

Parameters

region Region you intend to draw to.

void Gdk::Window::begin_resize_drag	(	WindowEdge	edge,
		int	button,
		int	root_x,
		int	root_y,
		guint32	timestamp
	)

Begins a window resize operation (for a toplevel window).

This function assumes that the drag is controlled by the client pointer device, use begin_resize_drag_for_device() to begin a drag with a different device.

Parameters

edge	The edge or corner from which the drag is started.
button	The button being used to drag, or 0 for a keyboard-initiated drag.
root_x	Root window X coordinate of mouse click that began the drag.
root_y	Root window Y coordinate of mouse click that began the drag.
timestamp	Timestamp of mouse click that began the drag (use Gdk::Event::get_time()).

void Gdk::Window::configure_finished ( )

Does nothing, present only for compatiblity.

Since gtkmm 2.6:: Deprecated: 3.8: this function is no longer needed

Deprecated:: This function is no longer needed.

static void Gdk::Window::constrain_size	(	const Geometry&	geometry,
		guint	flags,
		int	width,
		int	height,
		int &	new_width,
		int &	new_height
	)

static

Constrains a desired width and height according to a set of geometry hints (such as minimum and maximum size).

Parameters

geometry	A Gdk::Geometry structure.
flags	A mask indicating what portions of geometry are set.
width	Desired width of window.
height	Desired height of the window.
new_width	Location to store resulting width.
new_height	Location to store resulting height.

void Gdk::Window::coords_from_parent	(	double	parent_x,
		double	parent_y,
		double &	x,
		double &	y
	)

Transforms window coordinates from a parent window to a child window, where the parent window is the normal parent as returned by get_parent() for normal windows, and the window's embedder as returned by Gdk::OffscreenWindow::get_embedder() for offscreen windows.

For normal windows, calling this function is equivalent to subtracting the return values of get_position() from the parent coordinates. For offscreen windows however (which can be arbitrarily transformed), this function calls the GdkWindow::from-embedder: signal to translate the coordinates.

You should always use this function when writing generic code that walks down a window hierarchy.

See also: coords_from_parent()

Since gtkmm 2.22:

Parameters

x	X coordinate in child’s coordinate system.
y	Y coordinate in child’s coordinate system.
parent_x	Return location for X coordinate in parent’s coordinate system, or `nullptr`.
parent_y	Return location for Y coordinate in parent’s coordinate system, or `nullptr`.

static Glib::RefPtr<Window> Gdk::Window::create	(	const Glib::RefPtr< Window >&	parent,
		GdkWindowAttr *	attributes,
		int	attributes_mask
	)

static

::Cairo::RefPtr< ::Cairo::Context> Gdk::Window::create_cairo_context ( )

Creates a Cairo context for drawing to drawable.

Since gtkmm 2.10:

Deprecated:: Use begin_draw_frame() and Gdk::DrawingContext::get_cairo_context() instead.

Returns: A newly created Cairo context.

Glib::RefPtr<Gdk::GLContext> Gdk::Window::create_gl_context ( )

Creates a new GLContext matching the framebuffer format to the visual of the Window.

The context is disconnected from any particular window or surface.

If the creation of the GLContext failed an error will be thrown.

Before using the returned GLContext, you will need to call GLContext::make_current() or GLContext::realize().

Since gtkmm 3.18:

Returns: GLContext The newly created context.

Exceptions

GLError On missing GL implementation or extension required for context creation.

::Cairo::RefPtr< ::Cairo::Surface> Gdk::Window::create_similar_image_surface	(	::Cairo::Format	format,
		int	width,
		int	height,
		int	scale
	)

Create a new image surface that is efficient to draw on the given window.

Initially the surface contents are all 0 (transparent if contents have transparency, black otherwise.)

The width and height of the new surface are not affected by the scaling factor of the window, or by the scale argument; they are the size of the surface in device pixels. If you wish to create an image surface capable of holding the contents of window you can use:

[C example ellipted]

Since gtkmm 3.10:

Parameters

format	The format for the new surface.
width	Width of the new surface.
height	Height of the new surface.
scale	The scale of the new surface, or 0 to use same as window.

Returns: A pointer to the newly allocated surface. The caller owns the surface and should call cairo_surface_destroy() when done with it.

This function always returns a valid pointer, but it will return a pointer to a “nil” surface if other is already in an error state or any other error occurs.

::Cairo::RefPtr< ::Cairo::Surface> Gdk::Window::create_similar_surface	(	::Cairo::Content	content,
		int	width,
		int	height
	)

Create a new surface that is as compatible as possible with the given window.

For example the new surface will have the same fallback resolution and font options as window. Generally, the new surface will also use the same backend as window, unless that is not possible for some reason. The type of the returned surface may be examined with cairo_surface_get_type().

Initially the surface contents are all 0 (transparent if contents have transparency, black otherwise.)

Since gtkmm 2.22:

Parameters

content	The content for the new surface.
width	Width of the new surface.
height	Height of the new surface.

Returns: A pointer to the newly allocated surface. The caller owns the surface and should call cairo_surface_destroy() when done with it.

This function always returns a valid pointer, but it will return a pointer to a “nil” surface if other is already in an error state or any other error occurs.

void Gdk::Window::deiconify ( )

Attempt to deiconify (unminimize) window.

On X11 the window manager may choose to ignore the request to deiconify. When using GTK+, use gtk_window_deiconify() instead of the Gdk::Window variant. Or better yet, you probably want to use gtk_window_present(), which raises the window, focuses it, unminimizes it, and puts it on the current desktop.

Glib::RefPtr<DragContext> Gdk::Window::drag_begin ( const std::vector< Glib::ustring > & targets )

Starts a drag and creates a new drag context for it.

This method is called by the drag source.

Parameters

targets A list of the offered targets names.

Returns: A newly created Gdk::DragContext.

Since gtkmm 2.24:

void Gdk::Window::enable_synchronized_configure ( )

Does nothing, present only for compatiblity.

Since gtkmm 2.6:: Deprecated: 3.8: this function is no longer needed

Deprecated:: This function is no longer needed.

void Gdk::Window::end_draw_frame ( const Glib::RefPtr< DrawingContext >& context )

Indicates that the drawing of the contents of window started with gdk_window_begin_frame() has been completed.

This function will take care of destroying the Gdk::DrawingContext.

It is an error to call this function without a matching gdk_window_begin_frame() first.

Since gtkmm 3.22:

Parameters

context The Gdk::DrawingContext created by begin_draw_frame().

void Gdk::Window::end_paint ( )

Indicates that the backing store created by the most recent call to begin_paint_region() should be copied onscreen and deleted, leaving the next-most-recent backing store or no backing store at all as the active paint region.

See begin_paint_region() for full details.

It is an error to call this function without a matching begin_paint_region() first.

Deprecated:: Use end_draw_frame() instead.

bool Gdk::Window::ensure_native ( )

Tries to ensure that there is a window-system native window for this GdkWindow.

This may fail in some situations, returning false.

Offscreen window and children of them can never have native windows.

Some backends may not support native child windows.

Since gtkmm 2.18:

Returns: true if the window has a native window, false otherwise.

void Gdk::Window::flush ( )

This function does nothing.

Since gtkmm 2.18:

Deprecated: 3.14

Deprecated:: This method does nothing.

void Gdk::Window::focus ( guint32 timestamp )

Sets keyboard focus to window.

In most cases, gtk_window_present() should be used on a Gtk::Window, rather than calling this function.

Parameters

timestamp Timestamp of the event triggering the window focus.

void Gdk::Window::freeze_updates ( )

Temporarily freezes a window such that it won’t receive expose events.

The window will begin receiving expose events again when thaw_updates() is called. If freeze_updates() has been called more than once, thaw_updates() must be called an equal number of times to begin processing exposes.

void Gdk::Window::fullscreen ( )

Moves the window into fullscreen mode.

This means the window covers the entire screen and is above any panels or task bars.

If the window was already fullscreen, then this function does nothing.

On X11, asks the window manager to put window in a fullscreen state, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don’t have a concept of “fullscreen”; so you can’t rely on the fullscreenification actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

Since gtkmm 2.2:

void Gdk::Window::geometry_changed ( )

This function informs GDK that the geometry of an embedded offscreen window has changed.

This is necessary for GDK to keep track of which offscreen window the pointer is in.

Since gtkmm 2.18:

bool Gdk::Window::get_accept_focus ( ) const

Determines whether or not the desktop environment shuld be hinted that the window does not want to receive input focus.

Since gtkmm 2.22:

Returns: Whether or not the window should receive input focus.

::Cairo::RefPtr< ::Cairo::Pattern> Gdk::Window::get_background_pattern ( )

Gets the pattern used to clear the background on window.

If window does not have its own background and reuses the parent's, nullptr is returned and you’ll have to query it yourself.

Since gtkmm 2.22:

Returns: The pattern to use for the background or nullptr to use the parent’s background.

::Cairo::RefPtr<const ::Cairo::Pattern> Gdk::Window::get_background_pattern ( ) const

Gets the pattern used to clear the background on window.

If window does not have its own background and reuses the parent's, nullptr is returned and you’ll have to query it yourself.

Since gtkmm 2.22:

Returns: The pattern to use for the background or nullptr to use the parent’s background.

std::vector< Glib::RefPtr<Window> > Gdk::Window::get_children ( )

Gets the list of children of window known to GDK.

This function only returns children created via GDK, so for example it’s useless when used with the root window; it only returns windows an application created itself.

The returned list must be freed, but the elements in the list need not be.

Returns: List of child windows inside window.

std::vector< Glib::RefPtr<const Window> > Gdk::Window::get_children ( ) const

Gets the list of children of window known to GDK.

This function only returns children created via GDK, so for example it’s useless when used with the root window; it only returns windows an application created itself.

The returned list must be freed, but the elements in the list need not be.

Returns: List of child windows inside window.

::Cairo::RefPtr< ::Cairo::Region> Gdk::Window::get_clip_region ( ) const

Computes the region of a window that potentially can be written to by drawing primitives.

This region may not take into account other factors such as if the window is obscured by other windows, but no area outside of this region will be affected by drawing primitives.

Returns: A #cairo_region_t. This must be freed with cairo_region_destroy() when you are done.

bool Gdk::Window::get_composited ( ) const

Determines whether window is composited.

See set_composited().

Since gtkmm 2.22:

Deprecated: 3.16: Compositing is an outdated technology that only ever worked on X11.

Deprecated:: Compositing is an outdated technology that only ever worked on X11.

Returns: true if the window is composited.

Glib::RefPtr<Cursor> Gdk::Window::get_cursor ( )

Retrieves a Gdk::Cursor pointer for the cursor currently set on the specified Gdk::Window, or nullptr.

If the return value is nullptr then there is no custom cursor set on the specified window, and it is using the cursor for its parent window.

Since gtkmm 2.18:

Returns: A Gdk::Cursor, or nullptr. The returned object is owned by the Gdk::Window and should not be unreferenced directly. Use set_cursor() to unset the cursor of the window.

Glib::RefPtr<const Cursor> Gdk::Window::get_cursor ( ) const

Retrieves a Gdk::Cursor pointer for the cursor currently set on the specified Gdk::Window, or nullptr.

If the return value is nullptr then there is no custom cursor set on the specified window, and it is using the cursor for its parent window.

Since gtkmm 2.18:

Returns: A Gdk::Cursor, or nullptr. The returned object is owned by the Gdk::Window and should not be unreferenced directly. Use set_cursor() to unset the cursor of the window.

bool Gdk::Window::get_decorations ( WMDecoration& decorations ) const

Returns the decorations set on the GdkWindow with set_decorations().

Parameters

decorations The window decorations will be written here.

Returns: true if the window has decorations set, false otherwise.

static Glib::RefPtr<Window> Gdk::Window::get_default_root_window ( )

static

Obtains the root window (parent all other windows are inside) for the default display and screen.

Returns: The default root window.

Glib::RefPtr<Cursor> Gdk::Window::get_device_cursor ( const Glib::RefPtr< Device >& device )

Retrieves a Gdk::Cursor pointer for the device currently set on the specified Gdk::Window, or nullptr.

If the return value is nullptr then there is no custom cursor set on the specified window, and it is using the cursor for its parent window.

Since gtkmm 3.0:

Parameters

device A master, pointer Gdk::Device.

Returns: A Gdk::Cursor, or nullptr. The returned object is owned by the Gdk::Window and should not be unreferenced directly. Use set_cursor() to unset the cursor of the window.

Glib::RefPtr<const Cursor> Gdk::Window::get_device_cursor ( const Glib::RefPtr< const Device >& device ) const

Retrieves a Gdk::Cursor pointer for the device currently set on the specified Gdk::Window, or nullptr.

If the return value is nullptr then there is no custom cursor set on the specified window, and it is using the cursor for its parent window.

Since gtkmm 3.0:

Parameters

device A master, pointer Gdk::Device.

Returns: A Gdk::Cursor, or nullptr. The returned object is owned by the Gdk::Window and should not be unreferenced directly. Use set_cursor() to unset the cursor of the window.

EventMask Gdk::Window::get_device_events ( const Glib::RefPtr< const Device >& device ) const

Returns the event mask for window corresponding to an specific device.

Since gtkmm 3.0:

Parameters

device A Gdk::Device.

Returns: Device event mask for window.

Glib::RefPtr<Window> Gdk::Window::get_device_position	(	const Glib::RefPtr< const Device >&	device,
		int &	x,
		int &	y,
		ModifierType&	mask
	)		const

Obtains the current device position and modifier state.

The position is given in coordinates relative to the upper left corner of window.

Use get_device_position_double() if you need subpixel precision.

Since gtkmm 3.0:

Parameters

device	Pointer Gdk::Device to query to.
x	Return location for the X coordinate of device, or `nullptr`.
y	Return location for the Y coordinate of device, or `nullptr`.
mask	Return location for the modifier mask, or `nullptr`.

Returns: The window underneath device (as with Gdk::Device::get_window_at_position()), or nullptr if the window is not known to GDK.

Glib::RefPtr<Window> Gdk::Window::get_device_position	(	const Glib::RefPtr< const Device >&	device,
		double &	x,
		double &	y,
		ModifierType&	mask
	)		const

Obtains the current device position in doubles and modifier state.

The position is given in coordinates relative to the upper left corner of window.

Since gtkmm 3.10:

Parameters

device	Pointer Gdk::Device to query to.
x	Return location for the X coordinate of device, or `nullptr`.
y	Return location for the Y coordinate of device, or `nullptr`.
mask	Return location for the modifier mask, or `nullptr`.

Returns: The window underneath device (as with Gdk::Device::get_window_at_position()), or nullptr if the window is not known to GDK.

Glib::RefPtr<Display> Gdk::Window::get_display ( )

Gets the Gdk::Display associated with a Gdk::Window.

Since gtkmm 2.24:

Returns: The Gdk::Display associated with window.

Glib::RefPtr<const Display> Gdk::Window::get_display ( ) const

Gets the Gdk::Display associated with a Gdk::Window.

Since gtkmm 2.24:

Returns: The Gdk::Display associated with window.

DragProtocol Gdk::Window::get_drag_protocol ( Glib::RefPtr< Window >& target ) const

Finds out the DND protocol supported by a window.

Since gtkmm 3.0:

Parameters

target Location of the window where the drop should happen. This may be window or a proxy window, or nullptr if window does not support Drag and Drop.

Returns: The supported DND protocol.

DragProtocol Gdk::Window::get_drag_protocol ( ) const

Finds out the DND protocol supported by a window.

Since gtkmm 3.0:

Returns: The supported DND protocol.

Glib::RefPtr<Window> Gdk::Window::get_effective_parent ( )

Obtains the parent of window, as known to GDK.

Works like get_parent() for normal windows, but returns the window’s embedder for offscreen windows.

See also: Gdk::OffscreenWindow::get_embedder()

Since gtkmm 2.22:

Returns: Effective parent of window.

Glib::RefPtr<const Window> Gdk::Window::get_effective_parent ( ) const

Obtains the parent of window, as known to GDK.

Works like get_parent() for normal windows, but returns the window’s embedder for offscreen windows.

See also: Gdk::OffscreenWindow::get_embedder()

Since gtkmm 2.22:

Returns: Effective parent of window.

Glib::RefPtr<Window> Gdk::Window::get_effective_toplevel ( )

Gets the toplevel window that’s an ancestor of window.

Works like get_toplevel(), but treats an offscreen window's embedder as its parent, using get_effective_parent().

See also: Gdk::OffscreenWindow::get_embedder()

Since gtkmm 2.22:

Returns: The effective toplevel window containing window.

Glib::RefPtr<const Window> Gdk::Window::get_effective_toplevel ( ) const

Gets the toplevel window that’s an ancestor of window.

Works like get_toplevel(), but treats an offscreen window's embedder as its parent, using get_effective_parent().

See also: Gdk::OffscreenWindow::get_embedder()

Since gtkmm 2.22:

Returns: The effective toplevel window containing window.

bool Gdk::Window::get_event_compression ( ) const

Get the current event compression setting for this window.

Since gtkmm 3.12:

Returns: true if motion events will be compressed.

EventMask Gdk::Window::get_events ( ) const

Gets the event mask for window for all master input devices.

See set_events().

Returns: Event mask for window.

bool Gdk::Window::get_focus_on_map ( ) const

Determines whether or not the desktop environment should be hinted that the window does not want to receive input focus when it is mapped.

Since gtkmm 2.22:

Returns: Whether or not the window wants to receive input focus when it is mapped.

void Gdk::Window::get_frame_extents ( Rectangle& rect )

Obtains the bounding box of the window, including window manager titlebar/borders if any.

The frame position is given in root window coordinates. To get the position of the window itself (rather than the frame) in root window coordinates, use get_origin().

Deprecated:: Use the const method instead.

Parameters

rect	Rectangle to fill with bounding box of the window frame.

void Gdk::Window::get_frame_extents ( Rectangle& rect ) const

Obtains the bounding box of the window, including window manager titlebar/borders if any.

The frame position is given in root window coordinates. To get the position of the window itself (rather than the frame) in root window coordinates, use get_origin().

Parameters

rect	Rectangle to fill with bounding box of the window frame.

FullscreenMode Gdk::Window::get_fullscreen_mode ( ) const

Obtains the Gdk::FullscreenMode of the window.

Since gtkmm 3.8:

Returns: The Gdk::FullscreenMode applied to the window when fullscreen.

void Gdk::Window::get_geometry	(	int &	x,
		int &	y,
		int &	width,
		int &	height
	)		const

Any of the return location arguments to this function may be nullptr, if you aren’t interested in getting the value of that field.

The X and Y coordinates returned are relative to the parent window of window, which for toplevels usually means relative to the window decorations (titlebar, etc.) rather than relative to the root window (screen-size background window).

On the X11 platform, the geometry is obtained from the X server, so reflects the latest position of window; this may be out-of-sync with the position of window delivered in the most-recently-processed Gdk::EventConfigure. get_position() in contrast gets the position from the most recent configure event.

Note: If window is not a toplevel, it is much better to call get_position(), get_width() and get_height() instead, because it avoids the roundtrip to the X server and because these functions support the full 32-bit coordinate space, whereas get_geometry() is restricted to the 16-bit coordinates of X11.

Parameters

x	Return location for X coordinate of window (relative to its parent).
y	Return location for Y coordinate of window (relative to its parent).
width	Return location for width of window.
height	Return location for height of window.

Glib::RefPtr<Window> Gdk::Window::get_group ( )

Returns the group leader window for window.

See set_group().

Since gtkmm 2.4:

Returns: The group leader window for window.

Glib::RefPtr<const Window> Gdk::Window::get_group ( ) const

Returns the group leader window for window.

See set_group().

Since gtkmm 2.4:

Returns: The group leader window for window.

int Gdk::Window::get_height ( ) const

Returns the height of the given window.

On the X11 platform the returned size is the size reported in the most-recently-processed configure event, rather than the current size on the X server.

Since gtkmm 2.24:

Returns: The height of window.

bool Gdk::Window::get_modal_hint ( ) const

Determines whether or not the window manager is hinted that window has modal behaviour.

Since gtkmm 2.22:

Returns: Whether or not the window has the modal hint set.

Glib::RefPtr<Window> Gdk::Window::get_offscreen_embedder ( )

Gets the window that window is embedded in.

Since gtkmm 2.18:

Returns: The embedding Gdk::Window, or nullptr if window is not an mbedded offscreen window.

Glib::RefPtr<const Window> Gdk::Window::get_offscreen_embedder ( ) const

Gets the window that window is embedded in.

Since gtkmm 2.18:

Returns: The embedding Gdk::Window, or nullptr if window is not an mbedded offscreen window.

::Cairo::RefPtr< ::Cairo::Surface> Gdk::Window::get_offscreen_surface ( )

Gets the offscreen surface that an offscreen window renders into.

If you need to keep this around over window resizes, you need to add a reference to it.

Returns: The offscreen surface, or nullptr if not offscreen.

::Cairo::RefPtr<const ::Cairo::Surface> Gdk::Window::get_offscreen_surface ( ) const

Gets the offscreen surface that an offscreen window renders into.

If you need to keep this around over window resizes, you need to add a reference to it.

Returns: The offscreen surface, or nullptr if not offscreen.

int Gdk::Window::get_origin	(	int &	x,
		int &	y
	)		const

Obtains the position of a window in root window coordinates.

(Compare with get_position() and get_geometry() which return the position of a window relative to its parent window.)

Parameters

x	Return location for X coordinate.
y	Return location for Y coordinate.

Returns: Not meaningful, ignore.

Glib::RefPtr<Window> Gdk::Window::get_parent ( )

Obtains the parent of window, as known to GDK.

Does not query the X server; thus this returns the parent as passed to new(), not the actual parent. This should never matter unless you’re using Xlib calls mixed with GDK calls on the X11 platform. It may also matter for toplevel windows, because the window manager may choose to reparent them.

Note that you should use get_effective_parent() when writing generic code that walks up a window hierarchy, because get_parent() will most likely not do what you expect if there are offscreen windows in the hierarchy.

Returns: Parent of window.

Glib::RefPtr<const Window> Gdk::Window::get_parent ( ) const

Obtains the parent of window, as known to GDK.

Returns: Parent of window.

bool Gdk::Window::get_pass_through ( ) const

Returns whether input to the window is passed through to the window below.

See set_pass_through() for details

Since gtkmm 3.18:

Glib::RefPtr<Window> Gdk::Window::get_pointer	(	int &	x,
		int &	y,
		ModifierType&	mask
	)

Obtains the current pointer position and modifier state.

The position is given in coordinates relative to the upper left corner of window.

Deprecated: 3.0: Use get_device_position() instead.

Deprecated:: Use get_device_position() instead

Parameters

x	Return location for X coordinate of pointer or `nullptr` to not return the X coordinate.
y	Return location for Y coordinate of pointer or `nullptr` to not return the Y coordinate.
mask	Return location for modifier mask or `nullptr` to not return the modifier mask.

Returns: The window containing the pointer (as with at_pointer()), or nullptr if the window containing the pointer isn’t known to GDK.

void Gdk::Window::get_position	(	int &	x,
		int &	y
	)		const

Obtains the position of the window as reported in the most-recently-processed Gdk::EventConfigure.

Contrast with get_geometry() which queries the X server for the current window position, regardless of which events have been received or processed.

The position coordinates are relative to the window’s parent window.

Parameters

x	X coordinate of window.
y	Y coordinate of window.

void Gdk::Window::get_root_coords	(	int	x,
		int	y,
		int &	root_x,
		int &	root_y
	)

Obtains the position of a window position in root window coordinates.

This is similar to get_origin() but allows you to pass in any position in the window, not just the origin.

Since gtkmm 2.18:

Parameters

x	X coordinate in window.
y	Y coordinate in window.
root_x	Return location for X coordinate.
root_y	Return location for Y coordinate.

void Gdk::Window::get_root_origin	(	int &	x,
		int &	y
	)		const

Obtains the top-left corner of the window manager frame in root window coordinates.

Parameters

x	Return location for X position of window frame.
y	Return location for Y position of window frame.

int Gdk::Window::get_scale_factor ( ) const

Returns the internal scale factor that maps from window coordiantes to the actual device pixels.

On traditional systems this is 1, but on very high density outputs this can be a higher value (often 2).

A higher value means that drawing is automatically scaled up to a higher resolution, so any code doing drawing will automatically look nicer. However, if you are supplying pixel-based data the scale value can be used to determine whether to use a pixel resource with higher resolution data.

The scale of a window may change during runtime, if this happens a configure event will be sent to the toplevel window.

Since gtkmm 3.10:

Returns: The scale factor.

Glib::RefPtr<Screen> Gdk::Window::get_screen ( )

Gets the Gdk::Screen associated with a Gdk::Window.

Since gtkmm 2.24:

Returns: The Gdk::Screen associated with window.

Glib::RefPtr<const Screen> Gdk::Window::get_screen ( ) const

Gets the Gdk::Screen associated with a Gdk::Window.

Since gtkmm 2.24:

Returns: The Gdk::Screen associated with window.

EventMask Gdk::Window::get_source_events ( InputSource source ) const

Returns the event mask for window corresponding to the device class specified by source.

Parameters

source A Gdk::InputSource to define the source class.

Returns: Source event mask for window.

WindowState Gdk::Window::get_state ( ) const

Gets the bitwise OR of the currently active window state flags, from the Gdk::WindowState enumeration.

Returns: Window state bitfield.

bool Gdk::Window::get_support_multidevice ( )

Returns true if the window is aware of the existence of multiple devices.

Since gtkmm 3.0:

Returns: true if the window handles multidevice features.

Glib::RefPtr<Window> Gdk::Window::get_toplevel ( )

Gets the toplevel window that’s an ancestor of window.

Any window type but Gdk::WINDOW_CHILD is considered a toplevel window, as is a Gdk::WINDOW_CHILD window that has a root window as parent.

Note that you should use get_effective_toplevel() when you want to get to a window’s toplevel as seen on screen, because get_toplevel() will most likely not do what you expect if there are offscreen windows in the hierarchy.

Returns: The toplevel window containing window.

Glib::RefPtr<const Window> Gdk::Window::get_toplevel ( ) const

Gets the toplevel window that’s an ancestor of window.

Any window type but Gdk::WINDOW_CHILD is considered a toplevel window, as is a Gdk::WINDOW_CHILD window that has a root window as parent.

Returns: The toplevel window containing window.

static GType Gdk::Window::get_type ( )

static

Get the GType for this class, for use with the underlying GObject type system.

WindowTypeHint Gdk::Window::get_type_hint ( )

This function returns the type hint set for a window.

Since gtkmm 2.10:

Returns: The type hint set for window.

::Cairo::RefPtr< ::Cairo::Region> Gdk::Window::get_update_area ( )

Transfers ownership of the update area from window to the caller of the function.

That is, after calling this function, window will no longer have an invalid/dirty region; the update area is removed from window and handed to you. If a window has no update area, get_update_area() returns an invalid Region.

Returns: The update area for window.

void Gdk::Window::get_user_data ( gpointer * data )

Retrieves the user data for window, which is normally the widget that window belongs to.

See set_user_data().

Parameters

data	Return location for user data.

::Cairo::RefPtr< ::Cairo::Region> Gdk::Window::get_visible_region ( ) const

Computes the region of the window that is potentially visible.

This does not necessarily take into account if the window is obscured by other windows, but no area outside of this region is visible.

Returns: A #cairo_region_t. This must be freed with cairo_region_destroy() when you are done.

Glib::RefPtr<Visual> Gdk::Window::get_visual ( )

Gets the Gdk::Visual describing the pixel format of window.

Since gtkmm 2.24:

Returns: A Gdk::Visual.

Glib::RefPtr<const Visual> Gdk::Window::get_visual ( ) const

Gets the Gdk::Visual describing the pixel format of window.

Since gtkmm 2.24:

Returns: A Gdk::Visual.

int Gdk::Window::get_width ( ) const

Returns the width of the given window.

On the X11 platform the returned size is the size reported in the most-recently-processed configure event, rather than the current size on the X server.

Since gtkmm 2.24:

Returns: The width of window.

WindowType Gdk::Window::get_window_type ( ) const

Gets the type of the window.

See Gdk::WindowType.

Returns: Type of window.

GdkWindow* Gdk::Window::gobj ( )

inline

Provides access to the underlying C GObject.

const GdkWindow* Gdk::Window::gobj ( ) const

inline

Provides access to the underlying C GObject.

GdkWindow* Gdk::Window::gobj_copy ( )

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

bool Gdk::Window::has_native ( ) const

Checks whether the window has a native window or not.

Note that you can use ensure_native() if a native window is needed.

Since gtkmm 2.22:

Returns: true if the window has a native window, false otherwise.

void Gdk::Window::hide ( )

For toplevel windows, withdraws them, so they will no longer be known to the window manager; for all windows, unmaps them, so they won’t be displayed.

Normally done automatically as part of gtk_widget_hide().

void Gdk::Window::iconify ( )

Asks to iconify (minimize) window.

The window manager may choose to ignore the request, but normally will honor it. Using gtk_window_iconify() is preferred, if you have a Gtk::Window widget.

This function only makes sense when window is a toplevel window.

void Gdk::Window::input_shape_combine_region	(	const ::Cairo::RefPtr< ::Cairo::Region > &	shape_region,
		int	offset_x,
		int	offset_y
	)

Like shape_combine_region(), but the shape applies only to event handling.

Mouse events which happen while the pointer position corresponds to an unset bit in the mask will be passed on the window below window.

An input shape is typically used with RGBA windows. The alpha channel of the window defines which pixels are invisible and allows for nicely antialiased borders, and the input shape controls where the window is “clickable”.

On the X11 platform, this requires version 1.1 of the shape extension.

On the Win32 platform, this functionality is not present and the function does nothing.

Since gtkmm 2.10:

Parameters

shape_region	Region of window to be non-transparent.
offset_x	X position of shape_region in window coordinates.
offset_y	Y position of shape_region in window coordinates.

void Gdk::Window::invalidate ( bool invalidate_children )

A convenience wrapper around invalidate_region() which invalidates the whole region.

See invalidate_region() for details.

Parameters

invalidate_children Whether to also invalidate child windows.

void Gdk::Window::invalidate_rect	(	const Rectangle&	rect,
		bool	invalidate_children
	)

A convenience wrapper around invalidate_region() which invalidates a rectangular region.

See invalidate_region() for details. See also the invalidate_rect() method overload with no rect parameter, to invalidate the whole region.

Parameters

rect	Rectangle to invalidate.
invalidate_children	Whether to also invalidate child windows.

void Gdk::Window::invalidate_region	(	const ::Cairo::RefPtr< ::Cairo::Region > &	region,
		bool	invalidate_children = `true`
	)

Adds region to the update area for window.

The update area is the region that needs to be redrawn, or “dirty region.” The call process_updates() sends one or more expose events to the window, which together cover the entire update area. An application would normally redraw the contents of window in response to those expose events.

GDK will call process_all_updates() on your behalf whenever your program returns to the main loop and becomes idle, so normally there’s no need to do that manually, you just need to invalidate regions that you know should be redrawn.

The invalidate_children parameter controls whether the region of each child window that intersects region will also be invalidated. If false, then the update area for child windows will remain unaffected. See gdk_window_invalidate_maybe_recurse if you need fine grained control over which children are invalidated.

Parameters

region	A #cairo_region_t.
invalidate_children	`true` to also invalidate child windows.

bool Gdk::Window::is_input_only ( ) const

Determines whether or not the window is an input only window.

Since gtkmm 2.22:

Returns: true if window is input only.

bool Gdk::Window::is_shaped ( ) const

Determines whether or not the window is shaped.

Since gtkmm 2.22:

Returns: true if window is shaped.

bool Gdk::Window::is_viewable ( ) const

Check if the window and all ancestors of the window are mapped.

(This is not necessarily "viewable" in the X sense, since we only check as far as we have GDK window parents, not to the root window.)

Returns: true if the window is viewable.

bool Gdk::Window::is_visible ( ) const

Checks whether the window has been mapped (with show() or show_unraised()).

Returns: true if the window is mapped.

void Gdk::Window::lower ( )

Lowers window to the bottom of the Z-order (stacking order), so that other windows with the same parent window appear above window.

This is true whether or not the other windows are visible.

If window is a toplevel, the window manager may choose to deny the request to move the window in the Z-order, lower() only requests the restack, does not guarantee it.

Note that show() raises the window again, so don’t call this function before show(). (Try show_unraised().)

void Gdk::Window::maximize ( )

Maximizes the window.

If the window was already maximized, then this function does nothing.

On X11, asks the window manager to maximize window, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don’t have a concept of “maximized”; so you can’t rely on the maximization actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

On Windows, reliably maximizes the window.

void Gdk::Window::merge_child_input_shapes ( )

Merges the input shape masks for any child windows into the input shape mask for window.

i.e. the union of all input masks for window and its children will become the new input mask for window. See input_shape_combine_region().

This function is distinct from set_child_input_shapes() because it includes window’s input shape mask in the set of shapes to be merged.

Since gtkmm 2.10:

void Gdk::Window::merge_child_shapes ( )

Merges the shape masks for any child windows into the shape mask for window.

i.e. the union of all masks for window and its children will become the new mask for window. See shape_combine_region().

This function is distinct from set_child_shapes() because it includes window’s shape mask in the set of shapes to be merged.

void Gdk::Window::move	(	int	x,
		int	y
	)

Repositions a window relative to its parent window.

For toplevel windows, window managers may ignore or modify the move; you should probably use gtk_window_move() on a Gtk::Window widget anyway, instead of using GDK functions. For child windows, the move will reliably succeed.

If you’re also planning to resize the window, use move_resize() to both move and resize simultaneously, for a nicer visual effect.

Parameters

x	X coordinate relative to window’s parent.
y	Y coordinate relative to window’s parent.

void Gdk::Window::move_region	(	const ::Cairo::RefPtr< ::Cairo::Region > &	region,
		int	dx,
		int	dy
	)

Move the part of window indicated by region by dy pixels in the Y direction and dx pixels in the X direction.

The portions of region that not covered by the new position of region are invalidated.

Child windows are not moved.

Since gtkmm 2.8:

Parameters

region	The #cairo_region_t to move.
dx	Amount to move in the X direction.
dy	Amount to move in the Y direction.

void Gdk::Window::move_resize	(	int	x,
		int	y,
		int	width,
		int	height
	)

Equivalent to calling move() and resize(), except that both operations are performed at once, avoiding strange visual effects.

(i.e. the user may be able to see the window first move, then resize, if you don’t use move_resize().)

Parameters

x	New X position relative to window’s parent.
y	New Y position relative to window’s parent.
width	New width.
height	New height.

Window& Gdk::Window::operator= ( Window&& src )

noexcept

static void Gdk::Window::process_all_updates ( )

static

Calls process_updates() for all windows (see Gdk::Window) in the application.

void Gdk::Window::process_updates ( bool update_children )

Sends one or more expose events to window.

The areas in each expose event will cover the entire update area for the window (see invalidate_region() for details). Normally GDK calls process_all_updates() on your behalf, so there’s no need to call this function unless you want to force expose events to be delivered immediately and synchronously (vs. the usual case, where GDK delivers them in an idle handler). Occasionally this is useful to produce nicer scrolling behavior, for example.

Parameters

update_children Whether to also process updates for child windows.

Glib::PropertyProxy< Glib::RefPtr<Cursor> > Gdk::Window::property_cursor ( )

The mouse pointer for a Gdk::Window.

See Gdk::Window::set_cursor() and Gdk::Window::get_cursor() for details.

Since gtkmm 2.18:

Returns: A PropertyProxy that allows you to get or set the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy_ReadOnly< Glib::RefPtr<Cursor> > Gdk::Window::property_cursor ( ) const

The mouse pointer for a Gdk::Window.

See Gdk::Window::set_cursor() and Gdk::Window::get_cursor() for details.

Since gtkmm 2.18:

Returns: A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

void Gdk::Window::raise ( )

Raises window to the top of the Z-order (stacking order), so that other windows with the same parent window appear below window.

This is true whether or not the windows are visible.

If window is a toplevel, the window manager may choose to deny the request to move the window in the Z-order, raise() only requests the restack, does not guarantee it.

void Gdk::Window::register_dnd ( )

Registers a window as a potential drop destination.

void Gdk::Window::remove_filter	(	GdkFilterFunc	function,
		gpointer	data
	)

Remove a filter previously added with add_filter().

Parameters

function	Previously-added filter function.
data	User data for previously-added filter function.

void Gdk::Window::reparent	(	const Glib::RefPtr< Window >&	new_parent,
		int	x,
		int	y
	)

Reparents window into the given new_parent.

The window being reparented will be unmapped as a side effect.

Parameters

new_parent	New parent to move window into.
x	X location inside the new parent.
y	Y location inside the new parent.

void Gdk::Window::resize	(	int	width,
		int	height
	)

Resizes window; for toplevel windows, asks the window manager to resize the window.

The window manager may not allow the resize. When using GTK+, use gtk_window_resize() instead of this low-level GDK function.

Windows may not be resized below 1x1.

If you’re also planning to move the window, use move_resize() to both move and resize simultaneously, for a nicer visual effect.

Parameters

width	New width of the window.
height	New height of the window.

void Gdk::Window::resize_drag	(	WindowEdge	edge,
		const Glib::RefPtr< Device >&	device,
		int	button,
		int	root_x,
		int	root_y,
		guint32	timestamp
	)

Begins a window resize operation (for a toplevel window).

You might use this function to implement a “window resize grip,” for example; in fact Gtk::Statusbar uses it. The function works best with window managers that support the Extended Window Manager Hints but has a fallback implementation for other window managers.

Since gtkmm 3.4:

Parameters

edge	The edge or corner from which the drag is started.
device	The device used for the operation.
button	The button being used to drag, or 0 for a keyboard-initiated drag.
root_x	Root window X coordinate of mouse click that began the drag.
root_y	Root window Y coordinate of mouse click that began the drag.
timestamp	Timestamp of mouse click that began the drag (use Gdk::Event::get_time()).

void Gdk::Window::restack	(	const Glib::RefPtr< Window >&	sibling,
		bool	above
	)

Changes the position of window in the Z-order (stacking order), so that it is above sibling (if above is true) or below sibling (if above is false).

If sibling is nullptr, then this either raises (if above is true) or lowers the window.

If window is a toplevel, the window manager may choose to deny the request to move the window in the Z-order, restack() only requests the restack, does not guarantee it.

Since gtkmm 2.18:

Parameters

sibling	A Gdk::Window that is a sibling of window, or `nullptr`.
above	A boolean.

void Gdk::Window::restack ( bool above )

Changes the position of this window in the Z-order (stacking order).

This either raises (if above is true) or lowers the window.

If this is a toplevel, the window manager may choose to deny the request to move the window in the Z-order. restack() only requests the restack but does not guarantee it.

Parameters

above Whether to raise or lower the window.

Since gtkmm 2.18:

void Gdk::Window::scroll	(	int	dx,
		int	dy
	)

Scroll the contents of window, both pixels and children, by the given amount.

window itself does not move. Portions of the window that the scroll operation brings in from offscreen areas are invalidated. The invalidated region may be bigger than what would strictly be necessary.

For X11, a minimum area will be invalidated if the window has no subwindows, or if the edges of the window’s parent do not extend beyond the edges of the window. In other cases, a multi-step process is used to scroll the window which may produce temporary visual artifacts and unnecessary invalidations.

Parameters

dx	Amount to scroll in the X direction.
dy	Amount to scroll in the Y direction.

void Gdk::Window::set_accept_focus ( bool accept_focus = true )

Setting accept_focus to false hints the desktop environment that the window doesn’t want to receive input focus.

On X, it is the responsibility of the window manager to interpret this hint. ICCCM-compliant window manager usually respect it.

Since gtkmm 2.4:

Parameters

accept_focus true if the window should receive input focus.

void Gdk::Window::set_background ( const Color& color )

Sets the background color of window.

However, when using GTK+, influence the background of a widget using a style class or CSS — if you’re an application — or with gtk_style_context_set_background() — if you're implementing a custom widget.

See also set_background_pattern().

Parameters

rgba	A Gdk::RGBA color.

void Gdk::Window::set_background ( const ::Cairo::RefPtr< ::Cairo::Pattern > & pattern )

Sets the background of window.

A background of nullptr means that the window will inherit its background from its parent window.

The windowing system will normally fill a window with its background when the window is obscured then exposed.

Parameters

pattern A pattern to use, or nullptr.

void Gdk::Window::set_child_input_shapes ( )

Sets the input shape mask of window to the union of input shape masks for all children of window, ignoring the input shape mask of window itself.

Contrast with merge_child_input_shapes() which includes the input shape mask of window in the masks to be merged.

Since gtkmm 2.10:

void Gdk::Window::set_child_shapes ( )

Sets the shape mask of window to the union of shape masks for all children of window, ignoring the shape mask of window itself.

Contrast with merge_child_shapes() which includes the shape mask of window in the masks to be merged.

void Gdk::Window::set_composited ( bool composited = TRUE )

Sets a Gdk::Window as composited, or unsets it.

Composited windows do not automatically have their contents drawn to the screen. Drawing is redirected to an offscreen buffer and an expose event is emitted on the parent of the composited window. It is the responsibility of the parent’s expose handler to manually merge the off-screen content onto the screen in whatever way it sees fit.

It only makes sense for child windows to be composited; see set_opacity() if you need translucent toplevel windows.

An additional effect of this call is that the area of this window is no longer clipped from regions marked for invalidation on its parent. Draws done on the parent window are also no longer clipped by the child.

This call is only supported on some systems (currently, only X11 with new enough Xcomposite and Xdamage extensions). You must call Gdk::Display::supports_composite() to check if setting a window as composited is supported before attempting to do so.

Since gtkmm 2.12:

Deprecated: 3.16: Compositing is an outdated technology that only ever worked on X11.

Deprecated:: Compositing is an outdated technology that only ever worked on X11.

Parameters

composited true to set the window as composited.

void Gdk::Window::set_cursor ( const Glib::RefPtr< Cursor >& cursor )

Sets the mouse pointer for a Gdk::Window.

To make the cursor invisible, use gdk_cursor_new_from_pixmap() to create a cursor with no pixels in it.

Parameters

cursor A cursor.

void Gdk::Window::set_cursor ( )

Use the parent window's cursor.

For top-level windows this means that it will use the default cursor for the ROOT window.

static void Gdk::Window::set_debug_updates ( bool setting = true )

static

With update debugging enabled, calls to invalidate_region() clear the invalidated region of the screen to a noticeable color, and GDK pauses for a short time before sending exposes to windows during process_updates().

The net effect is that you can see the invalid region for each window and watch redraws as they occur. This allows you to diagnose inefficiencies in your application.

In essence, because the GDK rendering model prevents all flicker, if you are redrawing the same region 400 times you may never notice, aside from noticing a speed problem. Enabling update debugging causes GTK to flicker slowly and noticeably, so you can see exactly what’s being redrawn when, in what order.

The –gtk-debug=updates command line option passed to GTK+ programs enables this debug option at application startup time. That's usually more useful than calling set_debug_updates() yourself, though you might want to use this function to enable updates sometime after application startup time.

Parameters

setting true to turn on update debugging.

void Gdk::Window::set_decorations ( WMDecoration decorations )

“Decorations” are the features the window manager adds to a toplevel Gdk::Window.

This function sets the traditional Motif window manager hints that tell the window manager which decorations you would like your window to have. Usually you should use gtk_window_set_decorated() on a Gtk::Window instead of using the GDK function directly.

The decorations argument is the logical OR of the fields in the Gdk::WMDecoration enumeration. If Gdk::DECOR_ALL is included in the mask, the other bits indicate which decorations should be turned off. If Gdk::DECOR_ALL is not included, then the other bits indicate which decorations should be turned on.

Most window managers honor a decorations hint of 0 to disable all decorations, but very few honor all possible combinations of bits.

Parameters

decorations Decoration hint mask.

void Gdk::Window::set_device_cursor	(	const Glib::RefPtr< Device >&	device,
		const Glib::RefPtr< Cursor >&	cursor
	)

Sets a specific Gdk::Cursor for a given device when it gets inside window.

Use Gdk::Cursor::new_for_display() or Gdk::Cursor::new_from_pixbuf() to create the cursor. To make the cursor invisible, use Gdk::BLANK_CURSOR. Passing nullptr for the cursor argument to set_cursor() means that window will use the cursor of its parent window. Most windows should use this default.

Since gtkmm 3.0:

Parameters

device	A master, pointer Gdk::Device.
cursor	A Gdk::Cursor.

void Gdk::Window::set_device_cursor ( const Glib::RefPtr< Device >& device )

Use the parent window's cursor.

For top-level windows this means that it will use the default cursor for the ROOT window.

void Gdk::Window::set_device_events	(	const Glib::RefPtr< Device >&	device,
		EventMask	event_mask
	)

Sets the event mask for a given device (Normally a floating device, not attached to any visible pointer) to window.

For example, an event mask including Gdk::BUTTON_PRESS_MASK means the window should report button press events. The event mask is the bitwise OR of values from the Gdk::EventMask enumeration.

See the [input handling overview][event-masks] for details.

Since gtkmm 3.0:

Parameters

device	Gdk::Device to enable events for.
event_mask	Event mask for window.

void Gdk::Window::set_event_compression ( bool event_compression = true )

Determines whether or not extra unprocessed motion events in the event queue can be discarded.

If true only the most recent event will be delivered.

Some types of applications, e.g. paint programs, need to see all motion events and will benefit from turning off event compression.

By default, event compression is enabled.

Since gtkmm 3.12:

Parameters

event_compression true if motion events should be compressed.

void Gdk::Window::set_events ( EventMask event_mask )

The event mask for a window determines which events will be reported for that window from all master input devices.

For example, an event mask including Gdk::BUTTON_PRESS_MASK means the window should report button press events. The event mask is the bitwise OR of values from the Gdk::EventMask enumeration.

See the [input handling overview][event-masks] for details.

Parameters

event_mask Event mask for window.

void Gdk::Window::set_focus_on_map ( bool focus_on_map )

Setting focus_on_map to false hints the desktop environment that the window doesn’t want to receive input focus when it is mapped.

focus_on_map should be turned off for windows that aren’t triggered interactively (such as popups from network activity).

On X, it is the responsibility of the window manager to interpret this hint. Window managers following the freedesktop.org window manager extension specification should respect it.

Since gtkmm 2.6:

Parameters

focus_on_map true if the window should receive input focus when mapped.

void Gdk::Window::set_fullscreen_mode ( FullscreenMode mode )

Specifies whether the window should span over all monitors (in a multi-head setup) or only the current monitor when in fullscreen mode.

The mode argument is from the Gdk::FullscreenMode enumeration. If Gdk::FULLSCREEN_ON_ALL_MONITORS is specified, the fullscreen window will span over all monitors from the Gdk::Screen.

On X11, searches through the list of monitors from the Gdk::Screen the ones which delimit the 4 edges of the entire Gdk::Screen and will ask the window manager to span the window over these monitors.

If the XINERAMA extension is not available or not usable, this function has no effect.

Not all window managers support this, so you can’t rely on the fullscreen window to span over the multiple monitors when Gdk::FULLSCREEN_ON_ALL_MONITORS is specified.

Since gtkmm 3.8:

Parameters

mode	Fullscreen mode.

void Gdk::Window::set_functions ( WMFunction functions )

Sets hints about the window management functions to make available via buttons on the window frame.

On the X backend, this function sets the traditional Motif window manager hint for this purpose. However, few window managers do anything reliable or interesting with this hint. Many ignore it entirely.

The functions argument is the logical OR of values from the Gdk::WMFunction enumeration. If the bitmask includes Gdk::FUNC_ALL, then the other bits indicate which functions to disable; if it doesn’t include Gdk::FUNC_ALL, it indicates which functions to enable.

Parameters

functions Bitmask of operations to allow on window.

void Gdk::Window::set_geometry_hints	(	const Geometry&	geometry,
		WindowHints	geom_mask
	)

Sets the geometry hints for window.

Hints flagged in geom_mask are set, hints not flagged in geom_mask are unset. To unset all hints, use a geom_mask of 0 and a geometry of nullptr.

This function provides hints to the windowing system about acceptable sizes for a toplevel window. The purpose of this is to constrain user resizing, but the windowing system will typically (but is not required to) also constrain the current size of the window to the provided values and constrain programatic resizing via resize() or move_resize().

Note that on X11, this effect has no effect on windows of type Gdk::WINDOW_TEMP or windows where override redirect has been turned on via set_override_redirect() since these windows are not resizable by the user.

Since you can’t count on the windowing system doing the constraints for programmatic resizes, you should generally call constrain_size() yourself to determine appropriate sizes.

Parameters

geometry	Geometry hints.
geom_mask	Bitmask indicating fields of geometry to pay attention to.

void Gdk::Window::set_group ( const Glib::RefPtr< Window >& leader )

Sets the group leader window for window.

By default, GDK sets the group leader for all toplevel windows to a global window implicitly created by GDK. With this function you can override this default.

The group leader window allows the window manager to distinguish all windows that belong to a single application. It may for example allow users to minimize/unminimize all windows belonging to an application at once. You should only set a non-default group window if your application pretends to be multiple applications.

Parameters

leader Group leader window, or nullptr to restore the default group leader window.

void Gdk::Window::set_icon_list ( const std::vector< Glib::RefPtr< Gdk::Pixbuf > >& pixbufs )

Sets a list of icons for the window.

One of these will be used to represent the window when it has been iconified. The icon is usually shown in an icon box or some sort of task bar. Which icon size is shown depends on the window manager. The window manager can scale the icon but setting several size icons can give better image quality since the window manager may only need to scale the icon by a small amount or not at all.

Note that some platforms don't support window icons.

Parameters

pixbufs A list of pixbufs, of different sizes.

void Gdk::Window::set_icon_name ( const Glib::ustring & name )

Windows may have a name used while minimized, distinct from the name they display in their titlebar.

Most of the time this is a bad idea from a user interface standpoint. But you can set such a name with this function, if you like.

After calling this with a non-nullptr name, calls to set_title() will not update the icon title.

Using nullptr for name unsets the icon title; further calls to set_title() will again update the icon title as well.

Note that some platforms don't support window icons.

Parameters

name	Name of window while iconified (minimized).

void Gdk::Window::set_keep_above ( bool setting = true )

Set if window must be kept above other windows.

If the window was already above, then this function does nothing.

On X11, asks the window manager to keep window above, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don’t have a concept of “keep above”; so you can’t rely on the window being kept above. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

Since gtkmm 2.4:

Parameters

setting Whether to keep window above other windows.

void Gdk::Window::set_keep_below ( bool setting = true )

Set if window must be kept below other windows.

If the window was already below, then this function does nothing.

On X11, asks the window manager to keep window below, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don’t have a concept of “keep below”; so you can’t rely on the window being kept below. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

Since gtkmm 2.4:

Parameters

setting Whether to keep window below other windows.

void Gdk::Window::set_modal_hint ( bool modal = true )

The application can use this hint to tell the window manager that a certain window has modal behaviour.

The window manager can use this information to handle modal windows in a special way.

You should only use this on windows for which you have previously called set_transient_for()

Parameters

modal true if the window is modal, false otherwise.

void Gdk::Window::set_offscreen_embedder ( const Glib::RefPtr< Window >& embedder )

Sets window to be embedded in embedder.

To fully embed an offscreen window, in addition to calling this function, it is also necessary to handle the Gdk::Window::signal_pick_embedded_child() signal on the embedder and the Gdk::Window::signal_to_embedder() and Gdk::Window::signal_from_embedder() signals on window.

Since gtkmm 2.18:

Parameters

embedder The Gdk::Window that window gets embedded in.

void Gdk::Window::set_opacity ( double opacity )

Set window to render as partially transparent, with opacity 0 being fully transparent and 1 fully opaque.

(Values of the opacity parameter are clamped to the [0,1] range.)

For toplevel windows this depends on support from the windowing system that may not always be there. For instance, On X11, this works only on X screens with a compositing manager running. On Wayland, there is no per-window opacity value that the compositor would apply. Instead, use gdk_window_set_opaque_region (window, <tt>nullptr</tt>) to tell the compositor that the entire window is (potentially) non-opaque, and draw your content with alpha, or use gtk_widget_set_opacity() to set an overall opacity for your widgets.

For child windows this function only works for non-native windows.

For setting up per-pixel alpha topelevels, see Gdk::Screen::get_rgba_visual(), and for non-toplevels, see set_composited().

Support for non-toplevel windows was added in 3.8.

Since gtkmm 2.12:

Parameters

opacity Opacity.

void Gdk::Window::set_opaque_region ( const ::Cairo::RefPtr< const ::Cairo::Region > & region )

For optimisation purposes, compositing window managers may like to not draw obscured regions of windows, or turn off blending during for these regions.

With RGB windows with no transparency, this is just the shape of the window, but with ARGB32 windows, the compositor does not know what regions of the window are transparent or not.

This function only works for toplevel windows.

GTK+ will update this property automatically if the window background is opaque, as we know where the opaque regions are. If your window background is not opaque, please update this property in your Gtk::Widget::signal_style_updated() handler.

Since gtkmm 3.10:

Parameters

region A region, or nullptr.

void Gdk::Window::set_override_redirect ( bool override_redirect = true )

An override redirect window is not under the control of the window manager.

This means it won’t have a titlebar, won’t be minimizable, etc. - it will be entirely under the control of the application. The window manager can’t see the override redirect window at all.

Override redirect should only be used for short-lived temporary windows, such as popup menus. Gtk::Menu uses an override redirect window in its implementation, for example.

Parameters

override_redirect true if window should be override redirect.

void Gdk::Window::set_pass_through ( bool pass_through = true )

Sets whether input to the window is passed through to the window below.

The default value of this is false, which means that pointer events that happen inside the window are send first to the window, but if the event is not selected by the event mask then the event is sent to the parent window, and so on up the hierarchy.

If pass_through is true then such pointer events happen as if the window wasn't there at all, and thus will be sent first to any windows below window. This is useful if the window is used in a transparent fashion. In the terminology of the web this would be called "pointer-events: none".

Note that a window with pass_through true can still have a subwindow without pass through, so you can get events on a subset of a window. And in that cases you would get the in-between related events such as the pointer enter/leave events on its way to the destination window.

Since gtkmm 3.18:

Parameters

pass_through A boolean.

void Gdk::Window::set_role ( const Glib::ustring & role )

When using GTK+, typically you should use gtk_window_set_role() instead of this low-level function.

The window manager and session manager use a window’s role to distinguish it from other kinds of window in the same application. When an application is restarted after being saved in a previous session, all windows with the same title and role are treated as interchangeable. So if you have two windows with the same title that should be distinguished for session management purposes, you should set the role on those windows. It doesn’t matter what string you use for the role, as long as you have a different role for each non-interchangeable kind of window.

Parameters

role	A string indicating its role.

void Gdk::Window::set_shadow_width	(	int	left,
		int	right,
		int	top,
		int	bottom
	)

Newer GTK+ windows using client-side decorations use extra geometry around their frames for effects like shadows and invisible borders.

Window managers that want to maximize windows or snap to edges need to know where the extents of the actual frame lie, so that users don’t feel like windows are snapping against random invisible edges.

Note that this property is automatically updated by GTK+, so this function should only be used by applications which do not use GTK+ to create toplevel windows.

Since gtkmm 3.12:

Parameters

left	The left extent.
right	The right extent.
top	The top extent.
bottom	The bottom extent.

void Gdk::Window::set_skip_pager_hint ( bool skips_pager = true )

Toggles whether a window should appear in a pager (workspace switcher, or other desktop utility program that displays a small thumbnail representation of the windows on the desktop).

If a window’s semantic type as specified with set_type_hint() already fully describes the window, this function should not be called in addition, instead you should allow the window to be treated according to standard policy for its semantic type.

Since gtkmm 2.2:

Parameters

skips_pager true to skip the pager.

void Gdk::Window::set_skip_taskbar_hint ( bool skips_taskbar = true )

Toggles whether a window should appear in a task list or window list.

Since gtkmm 2.2:

Parameters

skips_taskbar true to skip the taskbar.

void Gdk::Window::set_source_events	(	InputSource	source,
		EventMask	event_mask
	)

Sets the event mask for any floating device (i.e. not attached to any visible pointer) that has the source defined as source.

This event mask will be applied both to currently existing, newly added devices after this call, and devices being attached/detached.

Since gtkmm 3.0:

Parameters

source	A Gdk::InputSource to define the source class.
event_mask	Event mask for window.

void Gdk::Window::set_startup_id ( const Glib::ustring & startup_id )

When using GTK+, typically you should use gtk_window_set_startup_id() instead of this low-level function.

Since gtkmm 2.12:

Parameters

startup_id A string with startup-notification identifier.

bool Gdk::Window::set_static_gravities ( bool use_static = true )

Used to set the bit gravity of the given window to static, and flag it so all children get static subwindow gravity.

This is used if you are implementing scary features that involve deep knowledge of the windowing system. Don’t worry about it.

Deprecated: 3.16: static gravities haven't worked on anything but X11 for a long time.

Deprecated:: Static gravities haven't worked on anything but X11 for a long time.

Parameters

use_static true to turn on static gravity.

Returns: false.

void Gdk::Window::set_support_multidevice ( bool support_multidevice = true )

This function will enable multidevice features in window.

Multidevice aware windows will need to handle properly multiple, per device enter/leave events, device grabs and grab ownerships.

Since gtkmm 3.0:

Parameters

support_multidevice true to enable multidevice support in window.

void Gdk::Window::set_title ( const Glib::ustring & title )

Sets the title of a toplevel window, to be displayed in the titlebar.

If you haven’t explicitly set the icon name for the window (using set_icon_name()), the icon name will be set to title as well. title must be in UTF-8 encoding (as with all user-readable strings in GDK/GTK+). title may not be nullptr.

Parameters

title Title of window.

void Gdk::Window::set_transient_for ( const Glib::RefPtr< Window >& parent )

Indicates to the window manager that window is a transient dialog associated with the application window parent.

This allows the window manager to do things like center window on parent and keep window above parent.

See gtk_window_set_transient_for() if you’re using Gtk::Window or Gtk::Dialog.

Parameters

parent Another toplevel Gdk::Window.

void Gdk::Window::set_type_hint ( WindowTypeHint hint )

The application can use this call to provide a hint to the window manager about the functionality of a window.

The window manager can use this information when determining the decoration and behaviour of the window.

The hint must be set before the window is mapped.

Parameters

hint	A hint of the function this window will have.

void Gdk::Window::set_urgency_hint ( bool urgent = true )

Toggles whether a window needs the user's urgent attention.

Since gtkmm 2.8:

Parameters

urgent true if the window is urgent.

void Gdk::Window::set_user_data ( gpointer user_data )

For most purposes this function is deprecated in favor of Glib::object_set_data().

However, for historical reasons GTK+ stores the Gtk::Widget that owns a Gdk::Window as user data on the Gdk::Window. So, custom widget implementations should use this function for that. If GTK+ receives an event for a Gdk::Window, and the user data for the window is non-nullptr, GTK+ will assume the user data is a Gtk::Widget, and forward the event to that widget.

Parameters

user_data User data.

void Gdk::Window::shape_combine_region	(	const ::Cairo::RefPtr< ::Cairo::Region > &	shape_region,
		int	offset_x = `0`,
		int	offset_y = `0`
	)

Makes pixels in window outside shape_region be transparent, so that the window may be nonrectangular.

If shape_region is nullptr, the shape will be unset, so the whole window will be opaque again. offset_x and offset_y are ignored if shape_region is nullptr.

On the X11 platform, this uses an X server extension which is widely available on most common platforms, but not available on very old X servers, and occasionally the implementation will be buggy. On servers without the shape extension, this function will do nothing.

This function works on both toplevel and child windows.

Parameters

shape_region	Region of window to be non-transparent.
offset_x	X position of shape_region in window coordinates.
offset_y	Y position of shape_region in window coordinates.

void Gdk::Window::show ( )

Like show_unraised(), but also raises the window to the top of the window stack (moves the window to the front of the Z-order).

This function maps a window so it’s visible onscreen. Its opposite is hide().

When implementing a Gtk::Widget, you should call this function on the widget's Gdk::Window as part of the “map” method.

void Gdk::Window::show_unraised ( )

Shows a Gdk::Window onscreen, but does not modify its stacking order.

In contrast, show() will raise the window to the top of the window stack.

On the X11 platform, in Xlib terms, this function calls XMapWindow() (it also updates some internal GDK state, which means that you can’t really use XMapWindow() directly on a GDK window).

bool Gdk::Window::show_window_menu ( GdkEvent * event )

Asks the windowing system to show the window menu.

The window menu is the menu shown when right-clicking the titlebar on traditional windows managed by the window manager. This is useful for windows using client-side decorations, activating it with a right-click on the window decorations.

Since gtkmm 3.14:

Parameters

event A Gdk::Event to show the menu for.

Returns: true if the window menu was shown and false otherwise.

void Gdk::Window::stick ( )

“Pins” a window such that it’s on all workspaces and does not scroll with viewports, for window managers that have scrollable viewports.

(When using Gtk::Window, gtk_window_stick() may be more useful.)

On the X11 platform, this function depends on window manager support, so may have no effect with many window managers. However, GDK will do the best it can to convince the window manager to stick the window. For window managers that don’t support this operation, there’s nothing you can do to force it to happen.

void Gdk::Window::thaw_updates ( )

Thaws a window frozen with freeze_updates().

void Gdk::Window::unfullscreen ( )

Moves the window out of fullscreen mode.

If the window was not fullscreen, does nothing.

On X11, asks the window manager to move window out of the fullscreen state, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don’t have a concept of “fullscreen”; so you can’t rely on the unfullscreenification actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

Since gtkmm 2.2:

void Gdk::Window::unmaximize ( )

Unmaximizes the window.

If the window wasn’t maximized, then this function does nothing.

On X11, asks the window manager to unmaximize window, if the window manager supports this operation. Not all window managers support this, and some deliberately ignore it or don’t have a concept of “maximized”; so you can’t rely on the unmaximization actually happening. But it will happen with most standard window managers, and GDK makes a best effort to get it to happen.

On Windows, reliably unmaximizes the window.

void Gdk::Window::unset_icon ( )

void Gdk::Window::unstick ( )

Reverse operation for stick(); see stick(), and gtk_window_unstick().

void Gdk::Window::withdraw ( )

Withdraws a window (unmaps it and asks the window manager to forget about it).

This function is not really useful as hide() automatically withdraws toplevel windows before hiding them.

Friends And Related Function Documentation

Glib::RefPtr< Gdk::Window > wrap	(	GdkWindow *	object,
		bool	take_copy = `false`
	)

A Glib::wrap() method for this object.

Parameters

object	The C instance.
take_copy	False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns: A C++ instance that wraps this C instance.

parent_x	X coordinate in parent’s coordinate system.
parent_y	Y coordinate in parent’s coordinate system.
x	Return location for X coordinate in child’s coordinate system.
y	Return location for Y coordinate in child’s coordinate system.

void Gdk::Window::coords_to_parent	(	double	x,
		double	y,
		double &	parent_x,
		double &	parent_y
	)

gtkmm: Gdk::Window Class Reference

Public Member Functions

Static Public Member Functions

Protected Member Functions

Related Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation