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GtkAccelLabel

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

Object Hierarchy

  GObject
   +----GInitiallyUnowned
         +----GtkObject
               +----GtkWidget
                     +----GtkMisc
                           +----GtkLabel
                                 +----GtkAccelLabel

Implemented Interfaces

GtkAccelLabel implements AtkImplementorIface and GtkBuildable.

Properties

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

Description

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

The accelerator key to display is not set explicitly. 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 'Ctl+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 'Ctl+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.

Example 11. Creating a simple menu item with an accelerator key.

  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_s, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);

Details

GtkAccelLabel

typedef struct _GtkAccelLabel GtkAccelLabel;

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


gtk_accel_label_new ()

GtkWidget*          gtk_accel_label_new                 (const gchar *string);

Creates a new GtkAccelLabel.

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().

accel_label :

a GtkAccelLabel

accel_closure :

the closure to monitor for accelerator changes.

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().

accel_label :

a GtkAccelLabel

Returns :

the object monitored by the accelerator label, or NULL.

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.

accel_label :

a GtkAccelLabel

accel_widget :

the widget to be monitored.

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.

accel_label :

a GtkAccelLabel.

Returns :

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

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.

accel_label :

a GtkAccelLabel.

Returns :

always returns FALSE.

Property Details

The "accel-closure" property

  "accel-closure"            GClosure*             : Read / Write

The closure to be monitored for accelerator changes.


The "accel-widget" property

  "accel-widget"             GtkWidget*            : Read / Write

The widget to be monitored for accelerator changes.

See Also

Keyboard Accelerators

installing and using keyboard short-cuts.

GtkItemFactory

an easier way to create menus.