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/* a button that displays a popup menu
*
* quick hack from totem-plugin-viewer.c
*/
/*
Copyright (C) 1991-2003 The National Gallery
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
#define DEBUG
*/
#include "ip.h"
static GtkToggleButtonClass *popupbutton_parent_class = NULL;
static void
popupbutton_class_init( PopupbuttonClass *class )
{
popupbutton_parent_class = g_type_class_peek_parent( class );
}
static void
popupbutton_init( Popupbutton *popupbutton )
{
popupbutton->menu = NULL;
}
GType
popupbutton_get_type( void )
{
static GType type = 0;
if( !type ) {
static const GTypeInfo info = {
sizeof( PopupbuttonClass ),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) popupbutton_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof( Popupbutton ),
32, /* n_preallocs */
(GInstanceInitFunc) popupbutton_init,
};
type = g_type_register_static( GTK_TYPE_TOGGLE_BUTTON,
"Popupbutton", &info, 0 );
}
return( type );
}
static void
popupbutton_position_func( GtkMenu *menu,
gint *x, gint *y, gboolean *push_in, GtkWidget *button )
{
GtkRequisition menu_req;
GtkTextDirection direction;
GtkAllocation allocation;
gtk_widget_size_request( GTK_WIDGET( menu ), &menu_req );
direction = gtk_widget_get_direction( button );
gdk_window_get_origin( gtk_widget_get_window( button ), x, y );
gtk_widget_get_allocation( button, &allocation );
*x += allocation.x;
*y += allocation.y;
if( direction == GTK_TEXT_DIR_LTR )
*x += VIPS_MAX( allocation.width - menu_req.width, 0 );
else if( menu_req.width > allocation.width )
*x -= menu_req.width - allocation.width;
*y += allocation.height;
*push_in = FALSE;
}
static void
popupbutton_over_arrow( Popupbutton *popupbutton, GdkEventButton *event )
{
GtkWidget *menu = popupbutton->menu;
gtk_menu_popup( GTK_MENU( menu ), NULL, NULL,
(GtkMenuPositionFunc) popupbutton_position_func,
popupbutton,
event ? event->button : 0,
event ? event->time : gtk_get_current_event_time() );
}
static void
popupbutton_toggled_cb( Popupbutton *popupbutton )
{
GtkWidget *menu = popupbutton->menu;
if( gtk_toggle_button_get_active( GTK_TOGGLE_BUTTON( popupbutton ) ) &&
!gtk_widget_get_visible( menu ) ) {
/* We get here only when the menu is activated by a key
* press, so that we can select the first menu item.
*/
popupbutton_over_arrow( popupbutton, NULL );
gtk_menu_shell_select_first( GTK_MENU_SHELL( menu ), FALSE );
}
}
static gboolean
popupbutton_button_press_event_cb( Popupbutton *popupbutton,
GdkEventButton *event )
{
if( event->button == 1 ) {
GtkWidget *menu = popupbutton->menu;
if( !gtk_widget_get_visible( menu ) ) {
popupbutton_over_arrow( popupbutton, event );
gtk_toggle_button_set_active(
GTK_TOGGLE_BUTTON( popupbutton ), TRUE );
}
else {
gtk_menu_popdown( GTK_MENU( menu ) );
gtk_toggle_button_set_active(
GTK_TOGGLE_BUTTON( popupbutton ), FALSE );
}
return TRUE;
}
return FALSE;
}
Popupbutton *
popupbutton_new( void )
{
Popupbutton *popupbutton;
GtkWidget *image;
popupbutton = g_object_new( TYPE_POPUPBUTTON, NULL );
image = gtk_image_new_from_stock( GTK_STOCK_EXECUTE,
GTK_ICON_SIZE_MENU );
gtk_container_add( GTK_CONTAINER( popupbutton ), image );
gtk_widget_show( image );
g_signal_connect( popupbutton, "toggled",
G_CALLBACK( popupbutton_toggled_cb ), NULL );
g_signal_connect( popupbutton, "button-press-event",
G_CALLBACK( popupbutton_button_press_event_cb ), NULL );
return( popupbutton );
}
static void
popupbutton_menu_unmap_cb( GtkWidget *menu,
Popupbutton *popupbutton )
{
gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON( popupbutton ), FALSE );
}
void
popupbutton_set_menu( Popupbutton *popupbutton, GtkWidget *menu )
{
g_assert( !popupbutton->menu );
popupbutton->menu = menu;
g_signal_connect( menu, "unmap",
G_CALLBACK( popupbutton_menu_unmap_cb ), popupbutton );
}
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