forked from AuroraMiddleware/gtk
1e3b62fd13
2001-09-24 Havoc Pennington <hp@redhat.com> * gtk/gtktextiter.c, gtk/gtktextbuffer.c, gtk/gtktextbtree.c, gtktextlayout.c: Get rid of the newline-that-could-not-be-deleted; buffers may now be zero-length. Much easier to fix than expected, once I figured out the right way to do it. However, there are various subtle bugs introduced by this that will have to get sorted out. Please use bugzilla.
321 lines
7.8 KiB
Plaintext
321 lines
7.8 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
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GtkMenu
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<!-- ##### SECTION Short_Description ##### -->
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a drop down 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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gtk_signal_connect_object(GTK_OBJECT(window), "button_press_event",
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GTK_SIGNAL_FUNC (my_popup_handler), GTK_OBJECT(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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* gtk_signal_connect_object 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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<!-- ##### STRUCT GtkMenu ##### -->
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<para>
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The #GtkMenu-struct 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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<!-- ##### 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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<!-- ##### 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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<!-- # Unused Parameters # -->
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@menu: a #GtkMenu.
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@child: The #GtkMenuItem to add.
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@m:
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@c:
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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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<!-- # Unused Parameters # -->
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@menu: a #GtkMenu.
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@child: The #GtkMenuItem to add.
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@menu_child:
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@m:
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@c:
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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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<!-- # Unused Parameters # -->
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@menu: a #GtkMenu.
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@child: The #GtkMenuItem to add.
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@pos:
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@position: 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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<!-- ##### 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_popup ##### -->
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<para>
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Displays a menu and makes it available for selection. Applications can use
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this function to display context-sensitive menus, and will typically supply
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NULL for the @parent_menu_shell, @parent_menu_item, @func and @data
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parameters. The default menu positioning function will position the menu
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at the current pointer position.
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</para>
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@menu: a #GtkMenu.
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@parent_menu_shell: the menu shell containing the triggering menu item.
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@parent_menu_item: the menu item whose activation triggered the popup.
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@func: a user supplied function used to position the menu.
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@data: user supplied data to be passed to @func.
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@button: the button which was pressed to initiate the event.
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@activate_time: the time at which the activation event occurred.
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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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</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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</para>
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@menu:
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@Returns:
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<!-- ##### FUNCTION gtk_menu_set_title ##### -->
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<para>
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Sets the title string for the menu. The title is displayed when the menu
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is shown as a tearoff menu.
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</para>
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@menu: a #GtkMenu.
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@title: a string containing the title for the menu.
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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.
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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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<!-- ##### 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:
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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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<!-- ##### ARG GtkMenu:tearoff-title ##### -->
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<para>
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</para>
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