gtk2/docs/reference/gtk/tmpl/gtkmenu.sgml
Tim Janik c2c98d9e12 some cleanups, fixed mnemonic_widget handling, added PROP_MNEMONIC_WIDGET.
Thu Mar 22 13:01:44 2001  Tim Janik  <timj@gtk.org>

        * gtk/gtklabel.[hc]: some cleanups, fixed mnemonic_widget handling,
        added PROP_MNEMONIC_WIDGET.

        * gtk/gtkwindow.c (gtk_window_activate_mnemonic):
        (gtk_window_remove_mnemonic):
        (gtk_window_add_mnemonic): fixed assertions.
        (gtk_window_activate_mnemonic): constrain modifier checks to those
        permitted by gtk_accelerator_get_default_mod_mask().
        got rid of gtk_window_get_default_accel_group().

        * gtk/gtkwidget.c (gtk_widget_real_activate_mnemonic): handle non
        activatable widgets either by focussing or a warning.
        added a signal accumulator to ::activate_mnemonic which stops the
        emission once a handler returned TRUE.
2001-03-22 13:44:00 +00:00

292 lines
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<!-- ##### SECTION Title ##### -->
GtkMenu
<!-- ##### SECTION Short_Description ##### -->
a drop down menu widget.
<!-- ##### SECTION Long_Description ##### -->
<para>
A #GtkMenu is a #GtkMenuShell that implements a drop down menu consisting of
a list of #GtkMenuItem objects which can be navigated and activated by the
user to perform application functions.
</para>
<para>
A #GtkMenu is most commonly dropped down by activating a #GtkMenuItem in a
#GtkMenuBar or popped up by activating a #GtkMenuItem in another #GtkMenu.
</para>
<para>
A #GtkMenu can also be popped up by activating a #GtkOptionMenu.
Other composite widgets such as the #GtkNotebook can pop up a #GtkMenu
as well.
</para>
<para>
Applications can display a #GtkMenu as a popup menu by calling the
gtk_menu_popup() function. The example below shows how an application
can pop up a menu when the 3rd mouse button is pressed.
</para>
<example>
<title>Connecting the popup signal handler.</title>
<programlisting>
/* connect our handler which will popup the menu */
gtk_signal_connect_object(GTK_OBJECT(window), "button_press_event",
GTK_SIGNAL_FUNC (my_popup_handler), GTK_OBJECT(menu));
</programlisting>
</example>
<example>
<title>Signal handler which displays a popup menu.</title>
<programlisting>
static gint
my_popup_handler(GtkWidget *widget, GdkEvent *event)
{
GtkMenu *menu;
GdkEventButton *event_button;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_MENU (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
/* The "widget" is the menu that was supplied when
* gtk_signal_connect_object was called.
*/
menu = GTK_MENU (widget);
if (event->type == GDK_BUTTON_PRESS)
{
event_button = (GdkEventButton *) event;
if (event_button->button == 3)
{
gtk_menu_popup (menu, NULL, NULL, NULL, NULL,
event_button->button, event_button->time);
return TRUE;
}
}
return FALSE;
}
</programlisting>
</example>
<!-- ##### SECTION See_Also ##### -->
<para>
</para>
<!-- ##### STRUCT GtkMenu ##### -->
<para>
The #GtkMenu-struct struct contains private data only, and
should be accessed using the functions below.
</para>
<!-- ##### FUNCTION gtk_menu_new ##### -->
<para>
Creates a new #GtkMenu.
</para>
@Returns: a new #GtkMenu.
<!-- ##### MACRO gtk_menu_append ##### -->
<para>
Adds a new #GtkMenuItem to the end of the menu's item list.
</para>
<!-- # Unused Parameters # -->
@menu: a #GtkMenu.
@child: The #GtkMenuItem to add.
<!-- ##### MACRO gtk_menu_prepend ##### -->
<para>
Adds a new #GtkMenuItem to the beginning of the menu's item list.
</para>
<!-- # Unused Parameters # -->
@menu: a #GtkMenu.
@child: The #GtkMenuItem to add.
<!-- ##### MACRO gtk_menu_insert ##### -->
<para>
Adds a new #GtkMenuItem to the menu's item list at the position
indicated by @position.
</para>
<!-- # Unused Parameters # -->
@menu: a #GtkMenu.
@child: The #GtkMenuItem to add.
@position: The position in the item list where @child is added.
Positions are numbered from 0 to n-1.
<!-- ##### FUNCTION gtk_menu_reorder_child ##### -->
<para>
Moves a #GtkMenuItem to a new position within the #GtkMenu.
</para>
@menu: a #GtkMenu.
@child: the #GtkMenuItem to move.
@position: the new position to place @child. Positions are numbered from
0 to n-1.
<!-- ##### FUNCTION gtk_menu_popup ##### -->
<para>
Displays a menu and makes it available for selection. Applications can use
this function to display context-sensitive menus, and will typically supply
NULL for the @parent_menu_shell, @parent_menu_item, @func and @data
parameters. The default menu positioning function will position the menu
at the current pointer position.
</para>
@menu: a #GtkMenu.
@parent_menu_shell: the menu shell containing the triggering menu item.
@parent_menu_item: the menu item whose activation triggered the popup.
@func: a user supplied function used to position the menu.
@data: user supplied data to be passed to @func.
@button: the button which was pressed to initiate the event.
@activate_time: the time at which the activation event occurred.
<!-- ##### FUNCTION gtk_menu_set_accel_group ##### -->
<para>
Set the #GtkAccelGroup which holds global accelerators for the menu.
</para>
@menu: a #GtkMenu.
@accel_group: the #GtkAccelGroup to be associated with the menu.
<!-- ##### FUNCTION gtk_menu_get_accel_group ##### -->
<para>
</para>
@menu:
@Returns:
<!-- ##### FUNCTION gtk_menu_set_title ##### -->
<para>
Sets the title string for the menu. The title is displayed when the menu
is shown as a tearoff menu.
</para>
@menu: a #GtkMenu.
@title: a string containing the title for the menu.
<!-- ##### FUNCTION gtk_menu_popdown ##### -->
<para>
Removes the menu from the screen.
</para>
@menu: a #GtkMenu.
<!-- ##### FUNCTION gtk_menu_reposition ##### -->
<para>
Repositions the menu according to its position function.
</para>
@menu: a #GtkMenu.
<!-- ##### FUNCTION gtk_menu_get_active ##### -->
<para>
Returns the selected menu item from the menu. This is used by the
#GtkOptionMenu.
</para>
@menu: a #GtkMenu.
@Returns: the #GtkMenuItem that was last selected in the menu. If a
selection has not yet been made, the first menu item is selected.
<!-- ##### FUNCTION gtk_menu_set_active ##### -->
<para>
Selects the specified menu item within the menu. This is used by the
#GtkOptionMenu.
</para>
@menu: a #GtkMenu.
@index: the index of the menu item to select. Index values are from
0 to n-1.
<!-- ##### FUNCTION gtk_menu_set_tearoff_state ##### -->
<para>
Changes the tearoff state of the menu. A menu is normally displayed
as drop down menu which persists as long as the menu is active. It can
also be displayed as a tearoff menu which persists until it is closed
or reattached.
</para>
@menu: a #GtkMenu.
@torn_off: If TRUE, menu is displayed as a tearoff menu.
<!-- ##### FUNCTION gtk_menu_attach_to_widget ##### -->
<para>
Attaches the menu to the widget and provides a callback function that will
be invoked when the menu calls gtk_menu_detach() during its destruction.
</para>
@menu: a #GtkMenu.
@attach_widget: the #GtkWidget that the menu will be attached to.
@detacher: the user supplied callback function that will be called when
the menu calls gtk_menu_detach().
<!-- ##### FUNCTION gtk_menu_detach ##### -->
<para>
Detaches the menu from the widget to which it had been attached.
This function will call the callback function, @detacher, provided
when the gtk_menu_attach_to_widget() function was called.
</para>
@menu: a #GtkMenu.
<!-- ##### FUNCTION gtk_menu_get_attach_widget ##### -->
<para>
Returns the #GtkWidget that the menu is attached to.
</para>
@menu: a #GtkMenu.
@Returns: the #GtkWidget that the menu is attached to.
<!-- ##### USER_FUNCTION GtkMenuPositionFunc ##### -->
<para>
A user function supplied when calling gtk_menu_popup() which controls the
positioning of the menu when it is displayed. The function sets the @x
and @y parameters to the coordinates where the menu is to be drawn.
</para>
@menu: a #GtkMenu.
@x: address of the #gint representing the horizontal position where the
menu shall be drawn. This is an output parameter.
@y: address of the #gint representing the vertical position where the
menu shall be drawn. This is an output parameter.
@push_in:
@user_data: the data supplied by the user in the gtk_menu_popup() @data
parameter.
<!-- ##### USER_FUNCTION GtkMenuDetachFunc ##### -->
<para>
A user function supplied when calling gtk_menu_attach_to_widget() which
will be called when the menu is later detached from the widget.
</para>
@attach_widget: the #GtkWidget that the menu is being detached from.
@menu: the #GtkMenu being detached.