/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-dropdown-menu.c
*
* Copyright (C) 2001 Ximian, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors:
* Ettore Perazzoli <ettore@ximian.com>
* Damon Chaplin <damon@ximian.com>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "e-dropdown-button.h"
#include <stdio.h>
#include <gtk/gtkarrow.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkwidget.h>
#include <libgnomeui/gnome-popup-menu.h>
struct _EDropdownButtonPrivate {
GtkAccelGroup *accel_group;
GtkWidget *menu;
};
G_DEFINE_TYPE (EDropdownButton, e_dropdown_button, GTK_TYPE_TOGGLE_BUTTON)
/* Callback to position the pop-up menu. */
static void
menu_position_cb (GtkMenu *menu,
int *x,
int *y,
gboolean *push_in,
void *data)
{
EDropdownButton *dropdown_button;
EDropdownButtonPrivate *priv;
GtkRequisition menu_requisition;
int max_x, max_y;
dropdown_button = E_DROPDOWN_BUTTON (data);
priv = dropdown_button->priv;
/* Calculate our preferred position. */
gdk_window_get_origin (GTK_WIDGET (dropdown_button)->window, x, y);
*y += GTK_WIDGET (dropdown_button)->allocation.height;
/* Now make sure we are on the screen. */
gtk_widget_size_request (GTK_WIDGET (priv->menu), &menu_requisition);
max_x = MAX (0, gdk_screen_width () - menu_requisition.width);
max_y = MAX (0, gdk_screen_height () - menu_requisition.height);
*x = CLAMP (*x, 0, max_x);
*y = CLAMP (*y, 0, max_y);
}
/* Callback for the "deactivate" signal on the pop-up menu. This is used so
that we unset the state of the toggle button when the pop-up menu
disappears. */
static int
menu_deactivate_cb (GtkMenuShell *menu_shell,
void *data)
{
EDropdownButton *dropdown_button;
dropdown_button = E_DROPDOWN_BUTTON (data);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (dropdown_button), FALSE);
return TRUE;
}
/* GtkObject methods. */
static void
impl_destroy (GtkObject *object)
{
EDropdownButton *dropdown_button;
EDropdownButtonPrivate *priv;
dropdown_button = E_DROPDOWN_BUTTON (object);
priv = dropdown_button->priv;
gtk_accel_group_unref (priv->accel_group);
gtk_widget_destroy (priv->menu);
g_free (priv);
if (GTK_OBJECT_CLASS (e_dropdown_button_parent_class)->destroy)
(* GTK_OBJECT_CLASS (e_dropdown_button_parent_class)->destroy) (object);
}
/* GtkWidget methods. */
static void
impl_toggled (GtkToggleButton *toggle_button)
{
EDropdownButton *dropdown_button;
EDropdownButtonPrivate *priv;
if (GTK_TOGGLE_BUTTON_CLASS (e_dropdown_button_parent_class)->toggled)
GTK_TOGGLE_BUTTON_CLASS (e_dropdown_button_parent_class)->toggled (toggle_button);
dropdown_button = E_DROPDOWN_BUTTON (toggle_button);
priv = dropdown_button->priv;
if (toggle_button->active) {
gtk_menu_popup (GTK_MENU (priv->menu), NULL, NULL,
menu_position_cb, dropdown_button,
1, GDK_CURRENT_TIME);
} else {
gtk_menu_popdown (GTK_MENU (priv->menu));
}
}
static void
e_dropdown_button_class_init (EDropdownButtonClass *klass)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
GtkToggleButtonClass *toggle_class;
object_class = GTK_OBJECT_CLASS (klass);
widget_class = GTK_WIDGET_CLASS (klass);
toggle_class = GTK_TOGGLE_BUTTON_CLASS (klass);
object_class->destroy = impl_destroy;
toggle_class->toggled = impl_toggled;
}
static void
e_dropdown_button_init (EDropdownButton *dropdown_button)
{
EDropdownButtonPrivate *priv;
priv = g_new (EDropdownButtonPrivate, 1);
priv->accel_group = gtk_accel_group_new ();
priv->menu = NULL;
dropdown_button->priv = priv;
}
/**
* e_dropdown_button_construct:
* @dropdown_button: A pointer to an %EDropdownButton object
* @label_text: Text to display in the button
* @menu: The menu to pop up when the button is pressed
*
* Construct the @dropdown_button with the specified @label_text and the
* associated @menu.
**/
void
e_dropdown_button_construct (EDropdownButton *dropdown_button,
const char *label_text,
GtkMenu *menu)
{
EDropdownButtonPrivate *priv;
GtkWidget *hbox;
GtkWidget *arrow;
GtkWidget *label;
unsigned int accel_key;
g_return_if_fail (dropdown_button != NULL);
g_return_if_fail (E_IS_DROPDOWN_BUTTON (dropdown_button));
g_return_if_fail (label_text != NULL);
g_return_if_fail (menu != NULL);
g_return_if_fail (GTK_IS_MENU (menu));
priv = dropdown_button->priv;
hbox = gtk_hbox_new (FALSE, 2);
gtk_container_add (GTK_CONTAINER (dropdown_button), hbox);
gtk_widget_show (hbox);
label = gtk_label_new ("");
accel_key = gtk_label_parse_uline (GTK_LABEL (label), label_text);
gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 0);
gtk_widget_show (label);
gtk_widget_add_accelerator (GTK_WIDGET (dropdown_button), "clicked",
priv->accel_group, accel_key, GDK_MOD1_MASK, 0);
arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_NONE);
gtk_box_pack_start (GTK_BOX (hbox), arrow, FALSE, FALSE, 2);
gtk_widget_show (arrow);
priv->menu = GTK_WIDGET (menu);
gtk_signal_connect_while_alive (GTK_OBJECT (priv->menu), "deactivate",
G_CALLBACK (menu_deactivate_cb),
dropdown_button, GTK_OBJECT (dropdown_button));
}
/**
* e_dropdown_button_new:
* @label_text: Text to display in the button
* @menu: The menu to pop up when the button is pressed
*
* Create a new dropdown button. When the button is clicked, the specified
* @menu will be popped up.
*
* Return value: A pointer to the newly created %EDropdownButton.
**/
GtkWidget *
e_dropdown_button_new (const char *label_text,
GtkMenu *menu)
{
GtkWidget *widget;
g_return_val_if_fail (label_text != NULL, NULL);
g_return_val_if_fail (menu != NULL, NULL);
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
widget = gtk_type_new (e_dropdown_button_get_type ());
e_dropdown_button_construct (E_DROPDOWN_BUTTON (widget), label_text, menu);
return widget;
}
