forked from AuroraMiddleware/gtk
458 lines
9.9 KiB
Plaintext
458 lines
9.9 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
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GtkMenu
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<!-- ##### SECTION Short_Description ##### -->
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A menu widget
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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A #GtkMenu is a #GtkMenuShell that implements a drop down menu consisting of
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a list of #GtkMenuItem objects which can be navigated and activated by the
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user to perform application functions.
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</para>
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<para>
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A #GtkMenu is most commonly dropped down by activating a #GtkMenuItem in a
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#GtkMenuBar or popped up by activating a #GtkMenuItem in another #GtkMenu.
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</para>
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<para>
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A #GtkMenu can also be popped up by activating a #GtkOptionMenu.
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Other composite widgets such as the #GtkNotebook can pop up a #GtkMenu
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as well.
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</para>
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<para>
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Applications can display a #GtkMenu as a popup menu by calling the
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gtk_menu_popup() function. The example below shows how an application
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can pop up a menu when the 3rd mouse button is pressed.
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</para>
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<example>
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<title>Connecting the popup signal handler.</title>
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<programlisting>
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/* connect our handler which will popup the menu */
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g_signal_connect_swapped (window, "button_press_event",
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G_CALLBACK (my_popup_handler), menu);
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</programlisting>
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</example>
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<example>
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<title>Signal handler which displays a popup menu.</title>
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<programlisting>
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static gint
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my_popup_handler (GtkWidget *widget, GdkEvent *event)
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{
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GtkMenu *menu;
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GdkEventButton *event_button;
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g_return_val_if_fail (widget != NULL, FALSE);
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g_return_val_if_fail (GTK_IS_MENU (widget), FALSE);
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g_return_val_if_fail (event != NULL, FALSE);
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/* The "widget" is the menu that was supplied when
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* g_signal_connect_swapped() was called.
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*/
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menu = GTK_MENU (widget);
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if (event->type == GDK_BUTTON_PRESS)
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{
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event_button = (GdkEventButton *) event;
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if (event_button->button == 3)
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{
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gtk_menu_popup (menu, NULL, NULL, NULL, NULL,
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event_button->button, event_button->time);
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return TRUE;
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}
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}
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return FALSE;
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}
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</programlisting>
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</example>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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</para>
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<!-- ##### SECTION Stability_Level ##### -->
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<!-- ##### STRUCT GtkMenu ##### -->
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<para>
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The #GtkMenu struct contains private data only, and
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should be accessed using the functions below.
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</para>
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<!-- ##### SIGNAL GtkMenu::move-scroll ##### -->
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<para>
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</para>
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@menu: the object which received the signal.
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@arg1:
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<!-- ##### ARG GtkMenu:accel-group ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:accel-path ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:active ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:attach-widget ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:monitor ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:tearoff-state ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:tearoff-title ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:bottom-attach ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:left-attach ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:right-attach ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:top-attach ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:double-arrows ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:horizontal-offset ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:horizontal-padding ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:vertical-offset ##### -->
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<para>
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</para>
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<!-- ##### ARG GtkMenu:vertical-padding ##### -->
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<para>
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</para>
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<!-- ##### FUNCTION gtk_menu_new ##### -->
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<para>
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Creates a new #GtkMenu.
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</para>
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@Returns: a new #GtkMenu.
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<!-- ##### FUNCTION gtk_menu_set_screen ##### -->
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<para>
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</para>
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@menu:
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@screen:
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<!-- ##### MACRO gtk_menu_append ##### -->
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<para>
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Adds a new #GtkMenuItem to the end of the menu's item list.
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</para>
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@menu: a #GtkMenu.
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@child: The #GtkMenuItem to add.
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@Deprecated: Use gtk_menu_shell_append() instead.
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<!-- ##### MACRO gtk_menu_prepend ##### -->
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<para>
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Adds a new #GtkMenuItem to the beginning of the menu's item list.
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</para>
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@menu: a #GtkMenu.
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@child: The #GtkMenuItem to add.
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@Deprecated: Use gtk_menu_shell_prepend() instead.
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<!-- ##### MACRO gtk_menu_insert ##### -->
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<para>
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Adds a new #GtkMenuItem to the menu's item list at the position
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indicated by @position.
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</para>
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@menu: a #GtkMenu.
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@child: The #GtkMenuItem to add.
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@pos: The position in the item list where @child is added.
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Positions are numbered from 0 to n-1.
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@Deprecated: Use gtk_menu_shell_insert() instead.
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<!-- ##### FUNCTION gtk_menu_reorder_child ##### -->
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<para>
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Moves a #GtkMenuItem to a new position within the #GtkMenu.
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</para>
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@menu: a #GtkMenu.
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@child: the #GtkMenuItem to move.
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@position: the new position to place @child. Positions are numbered from
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0 to n-1.
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<!-- ##### FUNCTION gtk_menu_attach ##### -->
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<para>
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</para>
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@menu:
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@child:
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@left_attach:
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@right_attach:
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@top_attach:
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@bottom_attach:
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<!-- ##### FUNCTION gtk_menu_popup ##### -->
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@menu:
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@parent_menu_shell:
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@parent_menu_item:
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@func:
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@data:
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@button:
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@activate_time:
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<!-- ##### FUNCTION gtk_menu_set_accel_group ##### -->
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<para>
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Set the #GtkAccelGroup which holds global accelerators for the menu.
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This accelerator group needs to also be added to all windows that
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this menu is being used in with gtk_window_add_accel_group(), in order
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for those windows to support all the accelerators contained in this group.
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</para>
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@menu: a #GtkMenu.
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@accel_group: the #GtkAccelGroup to be associated with the menu.
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<!-- ##### FUNCTION gtk_menu_get_accel_group ##### -->
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<para>
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Gets the #GtkAccelGroup which holds global accelerators for the menu.
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See gtk_menu_set_accel_group().
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</para>
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@menu: a #GtkMenu.
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@Returns: the #GtkAccelGroup associated with the menu.
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<!-- ##### FUNCTION gtk_menu_set_accel_path ##### -->
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<para>
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</para>
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@menu:
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@accel_path:
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<!-- ##### FUNCTION gtk_menu_set_title ##### -->
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<para>
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</para>
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@menu:
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@title:
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<!-- ##### FUNCTION gtk_menu_get_tearoff_state ##### -->
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<para>
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</para>
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@menu:
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@Returns:
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<!-- ##### FUNCTION gtk_menu_get_title ##### -->
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<para>
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</para>
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@menu:
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@Returns:
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<!-- ##### FUNCTION gtk_menu_popdown ##### -->
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<para>
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Removes the menu from the screen.
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</para>
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@menu: a #GtkMenu.
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<!-- ##### FUNCTION gtk_menu_reposition ##### -->
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<para>
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Repositions the menu according to its position function.
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</para>
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@menu: a #GtkMenu.
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<!-- ##### FUNCTION gtk_menu_get_active ##### -->
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<para>
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Returns the selected menu item from the menu. This is used by the
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#GtkOptionMenu.
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</para>
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@menu: a #GtkMenu.
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@Returns: the #GtkMenuItem that was last selected in the menu. If a
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selection has not yet been made, the first menu item is selected.
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<!-- ##### FUNCTION gtk_menu_set_active ##### -->
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<para>
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Selects the specified menu item within the menu. This is used by the
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#GtkOptionMenu and should not be used by anyone else.
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</para>
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@menu: a #GtkMenu.
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@index_: the index of the menu item to select. Index values are from
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0 to n-1.
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<!-- ##### FUNCTION gtk_menu_set_tearoff_state ##### -->
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<para>
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Changes the tearoff state of the menu. A menu is normally displayed
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as drop down menu which persists as long as the menu is active. It can
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also be displayed as a tearoff menu which persists until it is closed
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or reattached.
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</para>
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@menu: a #GtkMenu.
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@torn_off: If %TRUE, menu is displayed as a tearoff menu.
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<!-- ##### FUNCTION gtk_menu_attach_to_widget ##### -->
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<para>
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Attaches the menu to the widget and provides a callback function that will
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be invoked when the menu calls gtk_menu_detach() during its destruction.
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</para>
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@menu: a #GtkMenu.
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@attach_widget: the #GtkWidget that the menu will be attached to.
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@detacher: the user supplied callback function that will be called when
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the menu calls gtk_menu_detach().
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<!-- ##### FUNCTION gtk_menu_detach ##### -->
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<para>
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Detaches the menu from the widget to which it had been attached.
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This function will call the callback function, @detacher, provided
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when the gtk_menu_attach_to_widget() function was called.
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</para>
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@menu: a #GtkMenu.
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<!-- ##### FUNCTION gtk_menu_get_attach_widget ##### -->
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<para>
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Returns the #GtkWidget that the menu is attached to.
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</para>
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@menu: a #GtkMenu.
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@Returns: the #GtkWidget that the menu is attached to.
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<!-- ##### FUNCTION gtk_menu_get_for_attach_widget ##### -->
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<para>
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</para>
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@widget:
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@Returns:
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<!-- ##### USER_FUNCTION GtkMenuPositionFunc ##### -->
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<para>
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A user function supplied when calling gtk_menu_popup() which controls the
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positioning of the menu when it is displayed. The function sets the @x
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and @y parameters to the coordinates where the menu is to be drawn.
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</para>
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@menu: a #GtkMenu.
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@x: address of the #gint representing the horizontal position where the
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menu shall be drawn. This is an output parameter.
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@y: address of the #gint representing the vertical position where the
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menu shall be drawn. This is an output parameter.
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@push_in: This parameter controls how menus placed outside the monitor are handled.
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If this is set to TRUE and part of the menu is outside the monitor then
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GTK+ pushes the window into the visible area, effectively modifying the
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popup position.
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Note that moving and possibly resizing the menu around will alter the
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scroll position to keep the menu items "in place", i.e. at the same monitor
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position they would have been without resizing.
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In practice, this behavior is only useful for combobox popups or option
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menus and cannot be used to simply confine a menu to monitor boundaries.
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In that case, changing the scroll offset is not desirable.
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To simply constrain the menu within the monitor, get its size with
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gtk_widget_size_request() before showing it, and alter the coordinates
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passed to gtk_menu_popup() accordingly.
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@user_data: the data supplied by the user in the gtk_menu_popup() @data
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parameter.
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<!-- ##### USER_FUNCTION GtkMenuDetachFunc ##### -->
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<para>
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A user function supplied when calling gtk_menu_attach_to_widget() which
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will be called when the menu is later detached from the widget.
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</para>
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@attach_widget: the #GtkWidget that the menu is being detached from.
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@menu: the #GtkMenu being detached.
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<!-- ##### FUNCTION gtk_menu_set_monitor ##### -->
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<para>
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</para>
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@menu:
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@monitor_num:
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