GtkAccelLabel

GtkAccelLabel — A label which displays an accelerator key on the right of the text

Properties

GClosure * accel-closure Read / Write
GtkWidget * accel-widget Read / Write

Types and Values

struct GtkAccelLabel

Object Hierarchy

    GObject
    ╰── GInitiallyUnowned
        ╰── GtkWidget
            ╰── GtkMisc
                ╰── GtkLabel
                    ╰── GtkAccelLabel

Implemented Interfaces

GtkAccelLabel implements AtkImplementorIface and GtkBuildable.

Includes

#include <gtk/gtk.h>

Description

The GtkAccelLabel widget is a subclass of GtkLabel that also displays an accelerator key on the right of the label text, e.g. “Ctrl+S”. It is commonly used in menus to show the keyboard short-cuts for commands.

The accelerator key to display is typically not set explicitly (although it can be, with gtk_accel_label_set_accel()). Instead, the GtkAccelLabel displays the accelerators which have been added to a particular widget. This widget is set by calling gtk_accel_label_set_accel_widget().

For example, a GtkMenuItem widget may have an accelerator added to emit the “activate” signal when the “Ctrl+S” key combination is pressed. A GtkAccelLabel is created and added to the GtkMenuItem, and gtk_accel_label_set_accel_widget() is called with the GtkMenuItem as the second argument. The GtkAccelLabel will now display “Ctrl+S” after its label.

Note that creating a GtkMenuItem with gtk_menu_item_new_with_label() (or one of the similar functions for GtkCheckMenuItem and GtkRadioMenuItem) automatically adds a GtkAccelLabel to the GtkMenuItem and calls gtk_accel_label_set_accel_widget() to set it up for you.

A GtkAccelLabel will only display accelerators which have GTK_ACCEL_VISIBLE set (see GtkAccelFlags). A GtkAccelLabel can display multiple accelerators and even signal names, though it is almost always used to display just one accelerator key.

Creating a simple menu item with an accelerator key.

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GtkWidget *save_item;
GtkAccelGroup *accel_group;

// Create a GtkAccelGroup and add it to the window.
accel_group = gtk_accel_group_new ();
gtk_window_add_accel_group (GTK_WINDOW (window), accel_group);

// Create the menu item using the convenience function.
save_item = gtk_menu_item_new_with_label ("Save");
gtk_widget_show (save_item);
gtk_container_add (GTK_CONTAINER (menu), save_item);

// Now add the accelerator to the GtkMenuItem. Note that since we
// called gtk_menu_item_new_with_label() to create the GtkMenuItem
// the GtkAccelLabel is automatically set up to display the
// GtkMenuItem accelerators. We just need to make sure we use
// GTK_ACCEL_VISIBLE here.
gtk_widget_add_accelerator (save_item, "activate", accel_group,
                            GDK_KEY_s, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);

CSS nodes

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label
╰── accelerator

Like GtkLabel, GtkAccelLabel has a main CSS node with the name label. It adds a subnode with name accelerator.

Functions

gtk_accel_label_new ()

GtkWidget *
gtk_accel_label_new (const gchar *string);

Creates a new GtkAccelLabel.

Parameters

string

the label string. Must be non-NULL.

 

Returns

a new GtkAccelLabel.


gtk_accel_label_set_accel_closure ()

void
gtk_accel_label_set_accel_closure (GtkAccelLabel *accel_label,
                                   GClosure *accel_closure);

Sets the closure to be monitored by this accelerator label. The closure must be connected to an accelerator group; see gtk_accel_group_connect(). Passing NULL for accel_closure will dissociate accel_label from its current closure, if any.

Parameters

accel_label

a GtkAccelLabel

 

accel_closure

the closure to monitor for accelerator changes, or NULL.

[nullable]

gtk_accel_label_get_accel_widget ()

GtkWidget *
gtk_accel_label_get_accel_widget (GtkAccelLabel *accel_label);

Fetches the widget monitored by this accelerator label. See gtk_accel_label_set_accel_widget().

Parameters

accel_label

a GtkAccelLabel

 

Returns

the object monitored by the accelerator label, or NULL.

[nullable][transfer none]


gtk_accel_label_set_accel_widget ()

void
gtk_accel_label_set_accel_widget (GtkAccelLabel *accel_label,
                                  GtkWidget *accel_widget);

Sets the widget to be monitored by this accelerator label. Passing NULL for accel_widget will dissociate accel_label from its current widget, if any.

Parameters

accel_label

a GtkAccelLabel

 

accel_widget

the widget to be monitored, or NULL.

[nullable]

gtk_accel_label_get_accel_width ()

guint
gtk_accel_label_get_accel_width (GtkAccelLabel *accel_label);

Returns the width needed to display the accelerator key(s). This is used by menus to align all of the GtkMenuItem widgets, and shouldn't be needed by applications.

Parameters

accel_label

a GtkAccelLabel.

 

Returns

the width needed to display the accelerator key(s).


gtk_accel_label_set_accel ()

void
gtk_accel_label_set_accel (GtkAccelLabel *accel_label,
                           guint accelerator_key,
                           GdkModifierType accelerator_mods);

Manually sets a keyval and modifier mask as the accelerator rendered by accel_label .

If a keyval and modifier are explicitly set then these values are used regardless of any associated accel closure or widget.

Providing an accelerator_key of 0 removes the manual setting.

Parameters

accel_label

a GtkAccelLabel

 

accelerator_key

a keyval, or 0

 

accelerator_mods

the modifier mask for the accel

 

Since: 3.6


gtk_accel_label_get_accel ()

void
gtk_accel_label_get_accel (GtkAccelLabel *accel_label,
                           guint *accelerator_key,
                           GdkModifierType *accelerator_mods);

Gets the keyval and modifier mask set with gtk_accel_label_set_accel().

Parameters

accel_label

a GtkAccelLabel

 

accelerator_key

return location for the keyval.

[out]

accelerator_mods

return location for the modifier mask.

[out]

Since: 3.12


gtk_accel_label_refetch ()

gboolean
gtk_accel_label_refetch (GtkAccelLabel *accel_label);

Recreates the string representing the accelerator keys. This should not be needed since the string is automatically updated whenever accelerators are added or removed from the associated widget.

Parameters

accel_label

a GtkAccelLabel.

 

Returns

always returns FALSE.

Types and Values

struct GtkAccelLabel

struct GtkAccelLabel;

The GtkAccelLabel contains private data only, and should be accessed using the functions below.

Property Details

The “accel-closure” property

  “accel-closure”            GClosure *

The closure to be monitored for accelerator changes.

Flags: Read / Write


The “accel-widget” property

  “accel-widget”             GtkWidget *

The widget to be monitored for accelerator changes.

Flags: Read / Write

See Also

GtkAccelGroup