/* GTK - The GIMP Toolkit
*
* Copyright (C) 2003 Ricardo Fernandez Pascual
* Copyright (C) 2004 Paolo Borelli
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "eggdropdowntoolbutton.h"
#include <gtk/gtktogglebutton.h>
#include <gtk/gtkarrow.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkmenu.h>
#include <gtk/gtkmain.h>
#include <gdk/gdkkeysyms.h>
#define EGG_DROPDOWN_TOOL_BUTTON_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EGG_TYPE_DROPDOWN_TOOL_BUTTON, EggDropdownToolButtonPrivate))
struct _EggDropdownToolButtonPrivate
{
GtkWidget *button;
GtkWidget *arrow_button;
GtkMenu *menu;
};
static void egg_dropdown_tool_button_init (EggDropdownToolButton *button);
static void egg_dropdown_tool_button_class_init (EggDropdownToolButtonClass *klass);
static void egg_dropdown_tool_button_finalize (GObject *object);
enum {
MENU_ACTIVATED,
LAST_SIGNAL
};
static gint signals[LAST_SIGNAL];
static GObjectClass *parent_class = NULL;
GType
egg_dropdown_tool_button_get_type (void)
{
static GType type = 0;
if (type == 0)
{
static const GTypeInfo info =
{
sizeof (EggDropdownToolButtonClass),
(GBaseInitFunc) 0,
(GBaseFinalizeFunc) 0,
(GClassInitFunc) egg_dropdown_tool_button_class_init,
(GClassFinalizeFunc) 0,
NULL,
sizeof (EggDropdownToolButton),
0, /* n_preallocs */
(GInstanceInitFunc) egg_dropdown_tool_button_init
};
type = g_type_register_static (GTK_TYPE_TOOL_BUTTON,
"EggDropdownToolButton",
&info, 0);
}
return type;
}
static gboolean
egg_dropdown_tool_button_set_tooltip (GtkToolItem *tool_item,
GtkTooltips *tooltips,
const char *tip_text,
const char *tip_private)
{
EggDropdownToolButton *button;
g_return_val_if_fail (EGG_IS_DROPDOWN_TOOL_BUTTON (tool_item), FALSE);
button = EGG_DROPDOWN_TOOL_BUTTON (tool_item);
gtk_tooltips_set_tip (tooltips, button->priv->button, tip_text, tip_private);
return TRUE;
}
static void
egg_dropdown_tool_button_class_init (EggDropdownToolButtonClass *klass)
{
GObjectClass *object_class;
GtkToolItemClass *toolitem_class;
GtkToolButtonClass *toolbutton_class;
parent_class = g_type_class_peek_parent (klass);
object_class = (GObjectClass *)klass;
toolitem_class = (GtkToolItemClass *)klass;
toolbutton_class = (GtkToolButtonClass *)klass;
object_class->finalize = egg_dropdown_tool_button_finalize;
toolitem_class->set_tooltip = egg_dropdown_tool_button_set_tooltip;
signals[MENU_ACTIVATED] =
g_signal_new ("menu-activated",
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (EggDropdownToolButtonClass, menu_activated),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
g_type_class_add_private (object_class, sizeof (EggDropdownToolButtonPrivate));
}
static void
button_state_changed_cb (GtkWidget *widget,
GtkStateType previous_state,
EggDropdownToolButton *button)
{
EggDropdownToolButtonPrivate *priv = button->priv;
GtkWidget *b;
GtkStateType state = GTK_WIDGET_STATE (widget);
b = (widget == priv->arrow_button) ? priv->button : priv->arrow_button;
g_signal_handlers_block_by_func (G_OBJECT (b),
G_CALLBACK (button_state_changed_cb),
button);
if (state == GTK_STATE_PRELIGHT &&
previous_state != GTK_STATE_ACTIVE)
{
gtk_widget_set_state (b, state);
}
else if (state == GTK_STATE_NORMAL)
{
gtk_widget_set_state (b, state);
}
else if (state == GTK_STATE_ACTIVE)
{
gtk_widget_set_state (b, GTK_STATE_NORMAL);
}
g_signal_handlers_unblock_by_func (G_OBJECT (b),
G_CALLBACK (button_state_changed_cb),
button);
}
static void
menu_position_func (GtkMenu *menu,
int *x,
int *y,
gboolean *push_in,
EggDropdownToolButton *button)
{
EggDropdownToolButtonPrivate *priv;
GtkWidget *widget;
GtkRequisition menu_requisition;
int max_x, max_y;
priv = button->priv;
widget = GTK_WIDGET (button);
gdk_window_get_origin (widget->window, x, y);
gtk_widget_size_request (GTK_WIDGET (priv->menu), &menu_requisition);
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
*x += widget->allocation.x +
widget->allocation.width -
menu_requisition.width;
else
*x += widget->allocation.x;
*y += widget->allocation.y + widget->allocation.height;
/* Make sure we are on the screen. */
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);
}
static void
popup_menu_under_arrow (EggDropdownToolButton *button,
GdkEventButton *event)
{
EggDropdownToolButtonPrivate *priv = button->priv;
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (priv->arrow_button), TRUE);
g_signal_emit (button, signals[MENU_ACTIVATED], 0);
if (!priv->menu)
return;
gtk_menu_popup (priv->menu, NULL, NULL,
(GtkMenuPositionFunc) menu_position_func,
button,
event ? event->button : 0,
event ? event->time : gtk_get_current_event_time ());
}
static gboolean
arrow_button_press_event_cb (GtkWidget *widget,
GdkEventButton *event,
EggDropdownToolButton *button)
{
popup_menu_under_arrow (button, event);
return TRUE;
}
static gboolean
arrow_key_press_event_cb (GtkWidget *widget,
GdkEventKey *event,
EggDropdownToolButton *button)
{
if (event->keyval == GDK_space ||
event->keyval == GDK_KP_Space ||
event->keyval == GDK_Return ||
event->keyval == GDK_KP_Enter ||
event->keyval == GDK_Menu)
{
popup_menu_under_arrow (button, NULL);
}
return FALSE;
}
/* right click on the button shows the menu */
static gboolean
button_button_press_event_cb (GtkWidget *widget,
GdkEventButton *event,
EggDropdownToolButton *button)
{
if (event->button == 3)
{
popup_menu_under_arrow (button, event);
return TRUE;
}
return FALSE;
}
static void
button_popup_menu_cb (GtkWidget *widget,
EggDropdownToolButton *button)
{
popup_menu_under_arrow (button, NULL);
}
static void
egg_dropdown_tool_button_init (EggDropdownToolButton *button)
{
GtkWidget *hbox;
GtkWidget *arrow;
GtkWidget *arrow_button;
GtkWidget *real_button;
button->priv = EGG_DROPDOWN_TOOL_BUTTON_GET_PRIVATE (button);
gtk_tool_item_set_homogeneous (GTK_TOOL_ITEM (button), FALSE);
hbox = gtk_hbox_new (FALSE, 0);
real_button = GTK_BIN (button)->child;
g_object_ref (real_button);
gtk_container_remove (GTK_CONTAINER (button), real_button);
gtk_container_add (GTK_CONTAINER (hbox), real_button);
g_object_unref (real_button);
arrow_button = gtk_toggle_button_new ();
arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_OUT);
gtk_button_set_relief (GTK_BUTTON (arrow_button), GTK_RELIEF_NONE);
gtk_container_add (GTK_CONTAINER (arrow_button), arrow);
gtk_box_pack_end (GTK_BOX (hbox), arrow_button,
FALSE, FALSE, 0);
gtk_widget_show_all (hbox);
gtk_container_add (GTK_CONTAINER (button), hbox);
button->priv->button = real_button;
button->priv->arrow_button = arrow_button;
g_signal_connect (real_button, "state_changed",
G_CALLBACK (button_state_changed_cb), button);
g_signal_connect (real_button, "button_press_event",
G_CALLBACK (button_button_press_event_cb), button);
g_signal_connect (real_button, "popup_menu",
G_CALLBACK (button_popup_menu_cb), button);
g_signal_connect (arrow_button, "state_changed",
G_CALLBACK (button_state_changed_cb), button);
g_signal_connect (arrow_button, "key_press_event",
G_CALLBACK (arrow_key_press_event_cb), button);
g_signal_connect (arrow_button, "button_press_event",
G_CALLBACK (arrow_button_press_event_cb), button);
}
static void
egg_dropdown_tool_button_finalize (GObject *object)
{
EggDropdownToolButton *button;
button = EGG_DROPDOWN_TOOL_BUTTON (object);
if (button->priv->menu)
g_object_unref (button->priv->menu);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
GtkToolItem *
egg_dropdown_tool_button_new (void)
{
EggDropdownToolButton *button;
button = g_object_new (EGG_TYPE_DROPDOWN_TOOL_BUTTON,
NULL);
return GTK_TOOL_ITEM (button);
}
GtkToolItem *
egg_dropdown_tool_button_new_from_stock (const gchar *stock_id)
{
EggDropdownToolButton *button;
g_return_val_if_fail (stock_id != NULL, NULL);
button = g_object_new (EGG_TYPE_DROPDOWN_TOOL_BUTTON,
"stock_id", stock_id,
NULL);
return GTK_TOOL_ITEM (button);
}
/* 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,
EggDropdownToolButton *button)
{
EggDropdownToolButtonPrivate *priv = button->priv;
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (priv->arrow_button), FALSE);
return TRUE;
}
void
egg_dropdown_tool_button_set_menu (EggDropdownToolButton *button,
GtkMenuShell *menu)
{
EggDropdownToolButtonPrivate *priv;
g_return_if_fail (EGG_IS_DROPDOWN_TOOL_BUTTON (button));
g_return_if_fail (GTK_IS_MENU (menu));
priv = button->priv;
if (priv->menu != GTK_MENU (menu))
{
if (priv->menu)
g_object_unref (priv->menu);
priv->menu = GTK_MENU (menu);
g_object_ref (priv->menu);
gtk_object_sink (GTK_OBJECT (priv->menu));
g_signal_connect (button->priv->menu, "deactivate",
G_CALLBACK (menu_deactivate_cb), button);
}
}
GtkMenuShell *
egg_dropdown_tool_button_get_menu (EggDropdownToolButton *button)
{
return GTK_MENU_SHELL (button->priv->menu);
}
void
egg_dropdown_tool_button_set_arrow_tooltip (EggDropdownToolButton *button,
GtkTooltips *tooltips,
const gchar *tip_text,
const gchar *tip_private)
{
g_return_if_fail (EGG_IS_DROPDOWN_TOOL_BUTTON (button));
gtk_tooltips_set_tip (tooltips, button->priv->arrow_button, tip_text, tip_private);
}
