/*
* e-menu-button.c
*
* This program 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) version 3.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the program; if not, see <http://www.gnu.org/licenses/>
*
*
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
*/
#include "e-menu-button.h"
#define E_MENU_BUTTON_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE \
((obj), E_TYPE_MENU_BUTTON, EMenuButtonPrivate))
struct _EMenuButtonPrivate {
GtkWidget *toggle_button;
GtkMenu *menu; /* not referenced */
};
enum {
PROP_0,
PROP_MENU
};
enum {
SHOW_MENU,
LAST_SIGNAL
};
static gpointer parent_class;
static gulong signals[LAST_SIGNAL];
static void
menu_button_detach (GtkWidget *widget,
GtkMenu *menu)
{
EMenuButtonPrivate *priv;
priv = E_MENU_BUTTON_GET_PRIVATE (widget);
g_return_if_fail (priv->menu == menu);
priv->menu = NULL;
}
static void
menu_button_deactivate_cb (EMenuButton *menu_button)
{
GtkToggleButton *toggle_button;
toggle_button = GTK_TOGGLE_BUTTON (menu_button->priv->toggle_button);
gtk_toggle_button_set_active (toggle_button, FALSE);
}
static void
menu_button_menu_position (GtkMenu *menu,
gint *x,
gint *y,
gboolean *push_in,
EMenuButton *menu_button)
{
GtkRequisition requisition;
GtkTextDirection direction;
GdkRectangle monitor;
GdkScreen *screen;
GdkWindow *window;
GtkWidget *widget;
GtkWidget *toggle_button;
gint button_bottom;
gint monitor_bottom;
gint monitor_num;
widget = GTK_WIDGET (menu_button);
toggle_button = menu_button->priv->toggle_button;
gtk_widget_size_request (GTK_WIDGET (menu), &requisition);
window = gtk_widget_get_parent_window (widget);
screen = gtk_widget_get_screen (GTK_WIDGET (menu));
monitor_num = gdk_screen_get_monitor_at_window (screen, window);
if (monitor_num < 0)
monitor_num = 0;
gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);
gdk_window_get_origin (window, x, y);
*x += widget->allocation.x;
*y += widget->allocation.y;
direction = gtk_widget_get_direction (widget);
if (direction == GTK_TEXT_DIR_LTR)
x += MAX (widget->allocation.width - requisition.width, 0);
else if (requisition.width > widget->allocation.width)
x -= requisition.width - widget->allocation.width;
button_bottom = *y + toggle_button->allocation.height;
monitor_bottom = monitor.y + monitor.height;
if (button_bottom + requisition.height <= monitor_bottom)
y += toggle_button->allocation.height;
else if (*y - requisition.height >= monitor.y)
y -= requisition.height;
else if (monitor_bottom - button_bottom > *y)
y += toggle_button->allocation.height;
else
y -= requisition.height;
*push_in = FALSE;
}
static void
menu_button_show_popup_menu (EMenuButton *menu_button,
GdkEventButton *event)
{
g_signal_emit (menu_button, signals[SHOW_MENU], 0);
if (menu_button->priv->menu == NULL)
return;
if (event != NULL)
gtk_menu_popup (
menu_button->priv->menu, NULL, NULL,
(GtkMenuPositionFunc) menu_button_menu_position,
menu_button, event->button, event->time);
else
gtk_menu_popup (
menu_button->priv->menu, NULL, NULL,
(GtkMenuPositionFunc) menu_button_menu_position,
menu_button, 0, gtk_get_current_event_time ());
}
static gboolean
menu_button_toggle_button_press_event_cb (EMenuButton *menu_button,
GdkEventButton *event)
{
if (event->button == 1) {
menu_button_show_popup_menu (menu_button, event);
return TRUE;
}
return FALSE;
}
static void
menu_button_toggle_toggled_cb (EMenuButton *menu_button)
{
GtkMenuShell *menu_shell;
GtkToggleButton *toggle_button;
menu_shell = GTK_MENU_SHELL (menu_button->priv->menu);
toggle_button = GTK_TOGGLE_BUTTON (menu_button->priv->toggle_button);
if (!gtk_toggle_button_get_active (toggle_button))
return;
if (GTK_WIDGET_VISIBLE (menu_shell))
return;
/* We get here only when the menu is activated by a key
* press, so that we can select the first menu item. */
menu_button_show_popup_menu (menu_button, NULL);
gtk_menu_shell_select_first (menu_shell, FALSE);
}
static void
menu_button_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id) {
case PROP_MENU:
e_menu_button_set_menu (
E_MENU_BUTTON (object),
g_value_get_object (value));
return;
}
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
static void
menu_button_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
switch (property_id) {
case PROP_MENU:
g_value_set_object (
value, e_menu_button_get_menu (
E_MENU_BUTTON (object)));
return;
}
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
static void
menu_button_dispose (GObject *object)
{
EMenuButtonPrivate *priv;
priv = E_MENU_BUTTON_GET_PRIVATE (object);
if (priv->toggle_button != NULL) {
g_object_unref (priv->toggle_button);
priv->toggle_button = NULL;
}
if (priv->menu != NULL) {
g_signal_handlers_disconnect_by_func (
priv->menu, menu_button_deactivate_cb, object);
gtk_menu_detach (priv->menu);
}
/* Chain up to parent's dispose() method. */
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
menu_button_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
EMenuButtonPrivate *priv;
GtkRequisition child_requisition;
GtkWidget *child;
priv = E_MENU_BUTTON_GET_PRIVATE (widget);
/* Chain up to parent's size_request() method. */
GTK_WIDGET_CLASS (parent_class)->size_request (widget, requisition);
child = priv->toggle_button;
gtk_widget_size_request (child, &child_requisition);
requisition->width += child_requisition.width;
}
static void
menu_button_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
EMenuButtonPrivate *priv;
GtkAllocation child_allocation;
GtkRequisition child_requisition;
GtkWidget *child;
gint toggle_x;
priv = E_MENU_BUTTON_GET_PRIVATE (widget);
widget->allocation = *allocation;
child = priv->toggle_button;
gtk_widget_size_request (child, &child_requisition);
toggle_x = allocation->x + allocation->width - child_requisition.width;
child_allocation.x = allocation->x;
child_allocation.y = allocation->y;
child_allocation.width = toggle_x - allocation->x;
child_allocation.height = allocation->height;
/* Chain up to parent's size_allocate() method. */
GTK_WIDGET_CLASS (parent_class)->
size_allocate (widget, &child_allocation);
child_allocation.x = toggle_x;
child_allocation.y = allocation->y;
child_allocation.width = child_requisition.width;
child_allocation.height = allocation->height;
gtk_widget_size_allocate (child, &child_allocation);
}
static void
menu_button_state_changed (GtkWidget *widget,
GtkStateType previous_state)
{
EMenuButtonPrivate *priv;
priv = E_MENU_BUTTON_GET_PRIVATE (widget);
if (!GTK_WIDGET_IS_SENSITIVE (widget) && priv->menu != NULL)
gtk_menu_shell_deactivate (GTK_MENU_SHELL (priv->menu));
/* Chain up to parent's state_changed() method. */
GTK_WIDGET_CLASS (parent_class)->
state_changed (widget, previous_state);
}
static void
menu_button_remove (GtkContainer *container,
GtkWidget *widget)
{
EMenuButtonPrivate *priv;
priv = E_MENU_BUTTON_GET_PRIVATE (container);
/* Look in the internal widgets first. */
if (widget == priv->toggle_button) {
gtk_widget_unparent (priv->toggle_button);
gtk_widget_queue_resize (GTK_WIDGET (container));
return;
}
/* Chain up to parent's remove() method. */
GTK_CONTAINER_CLASS (parent_class)->remove (container, widget);
}
static void
menu_button_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
EMenuButtonPrivate *priv;
priv = E_MENU_BUTTON_GET_PRIVATE (container);
if (include_internals)
callback (priv->toggle_button, callback_data);
/* Chain up to parent's forall() method. */
GTK_CONTAINER_CLASS (parent_class)->forall (
container, include_internals, callback, callback_data);
}
static void
menu_button_class_init (EMenuButtonClass *class)
{
GObjectClass *object_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
parent_class = g_type_class_peek_parent (class);
g_type_class_add_private (class, sizeof (EMenuButtonPrivate));
object_class = G_OBJECT_CLASS (class);
object_class->set_property = menu_button_set_property;
object_class->get_property = menu_button_get_property;
object_class->dispose = menu_button_dispose;
widget_class = GTK_WIDGET_CLASS (class);
widget_class->size_request = menu_button_size_request;
widget_class->size_allocate = menu_button_size_allocate;
widget_class->state_changed = menu_button_state_changed;
container_class = GTK_CONTAINER_CLASS (class);
container_class->remove = menu_button_remove;
container_class->forall = menu_button_forall;
g_object_class_install_property (
object_class,
PROP_MENU,
g_param_spec_object (
"menu",
"Menu",
NULL,
GTK_TYPE_MENU,
G_PARAM_READWRITE));
signals[SHOW_MENU] = g_signal_new (
"show-menu",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (EMenuButtonClass, show_menu),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
static void
menu_button_init (EMenuButton *menu_button)
{
GtkWidget *container;
GtkWidget *widget;
menu_button->priv = E_MENU_BUTTON_GET_PRIVATE (menu_button);
container = GTK_WIDGET (menu_button);
widget = gtk_toggle_button_new ();
gtk_widget_set_sensitive (widget, FALSE);
gtk_widget_set_parent (widget, container);
menu_button->priv->toggle_button = g_object_ref (widget);
gtk_widget_show (widget);
container = widget;
widget = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_NONE);
gtk_container_add (GTK_CONTAINER (container), widget);
gtk_widget_show (widget);
g_signal_connect_swapped (
menu_button->priv->toggle_button, "button-press-event",
G_CALLBACK (menu_button_toggle_button_press_event_cb),
menu_button);
g_signal_connect_swapped (
menu_button->priv->toggle_button, "toggled",
G_CALLBACK (menu_button_toggle_toggled_cb), menu_button);
}
GType
e_menu_button_get_type (void)
{
static GType type = 0;
if (G_UNLIKELY (type == 0)) {
static const GTypeInfo type_info = {
sizeof (EMenuButtonClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) menu_button_class_init,
(GClassFinalizeFunc) NULL,
NULL, /* class_init */
sizeof (EMenuButton),
0, /* n_preallocs */
(GInstanceInitFunc) menu_button_init,
NULL /* value_table */
};
type = g_type_register_static (
GTK_TYPE_BUTTON, "EMenuButton", &type_info, 0);
}
return type;
}
GtkWidget *
e_menu_button_new (void)
{
return g_object_new (E_TYPE_MENU_BUTTON, NULL);
}
GtkWidget *
e_menu_button_get_menu (EMenuButton *menu_button)
{
g_return_val_if_fail (E_IS_MENU_BUTTON (menu_button), NULL);
return GTK_WIDGET (menu_button->priv->menu);
}
void
e_menu_button_set_menu (EMenuButton *menu_button,
GtkWidget *menu)
{
g_return_if_fail (E_IS_MENU_BUTTON (menu_button));
g_return_if_fail (GTK_IS_MENU (menu) || menu == NULL);
if (menu_button->priv->menu == GTK_MENU (menu))
goto exit;
if (menu_button->priv->menu != NULL) {
GtkMenuShell *menu_shell;
menu_shell = GTK_MENU_SHELL (menu_button->priv->menu);
if (GTK_WIDGET_VISIBLE (menu_shell))
gtk_menu_shell_deactivate (menu_shell);
g_signal_handlers_disconnect_by_func (
menu_shell, menu_button_deactivate_cb, menu_button);
gtk_menu_detach (menu_button->priv->menu);
}
menu_button->priv->menu = GTK_MENU (menu);
if (menu != NULL) {
gtk_menu_attach_to_widget (
GTK_MENU (menu), GTK_WIDGET (menu_button),
(GtkMenuDetachFunc) menu_button_detach);
g_signal_connect_swapped (
menu, "deactivate",
G_CALLBACK (menu_button_deactivate_cb), menu_button);
}
gtk_widget_set_sensitive (
menu_button->priv->toggle_button, menu != NULL);
exit:
g_object_notify (G_OBJECT (menu_button), "menu");
}