AccelLabel

open class AccelLabel : Label, AccelLabelProtocol

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.

(C Language Example):

  GtkWidget *window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  GtkWidget *menu = gtk_menu_new ();
  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

(plain Language Example):

label
╰── accelerator

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

The AccelLabel type acts as a reference-counted owner of an underlying GtkAccelLabel instance. It provides the methods that can operate on this data type through AccelLabelProtocol conformance. Use AccelLabel as a strong reference or owner of a GtkAccelLabel instance.