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gtk3/gtk/gtkmenubutton.c
Matthias Clasen fff4c8e841 Documentation fixes 
The documentation for GtkMenuButton was still referring to a
"menu" properties in several places, though it has been renamed
to "popup".
2013-01-13 08:27:20 -05:00

937 lines
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/* GTK - The GIMP Toolkit
*
* Copyright (C) 2003 Ricardo Fernandez Pascual
* Copyright (C) 2004 Paolo Borelli
* Copyright (C) 2012 Bastien Nocera
*
* 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, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:gtkmenubutton
* @short_description: A widget that shows a menu when clicked on
* @title: GtkMenuButton
*
* The #GtkMenuButton widget is used to display a menu when clicked on.
* This menu can be provided either as a #GtkMenu, or an abstract #GMenuModel.
*
* The #GtkMenuButton widget can hold any valid child widget. That is, it
* can hold almost any other standard #GtkWidget. The most commonly used
* child is the provided #GtkArrow.
*
* The positioning of the menu is determined by the #GtkMenuButton:direction
* property of the menu button and the #GtkWidget:halign or #GtkWidget:valign
* properties of the menu. For example, when the direction is %GTK_ARROW_DOWN
* and the horizontal alignment is %GTK_ALIGN_START, the menu will be
* positioned below the button, with the starting edge (depending on the
* text direction) of the menu aligned with the starting edge of the button.
* If there is not enough space below the button, the menu is popped up above
* the button instead. If the alignment would move part of the menu offscreen,
* it is 'pushed in'.
*
* <informaltable>
* <tgroup cols="4">
* <tbody>
* <row>
* <entry></entry>
* <entry>halign = start</entry>
* <entry>halign = center</entry>
* <entry>halign = end</entry>
* </row>
* <row>
* <entry>direction = down</entry>
* <entry>
* <inlinemediaobject>
* <imageobject><imagedata fileref="down-start.png" format="PNG"/></imageobject>
* </inlinemediaobject>
* </entry>
* <entry>
* <inlinemediaobject>
* <imageobject><imagedata fileref="down-center.png" format="PNG"/></imageobject>
* </inlinemediaobject>
* </entry>
* <entry>
* <inlinemediaobject>
* <imageobject><imagedata fileref="down-end.png" format="PNG"/></imageobject>
* </inlinemediaobject>
* </entry>
* </row>
* <row>
* <entry>direction = up</entry>
* <entry>
* <inlinemediaobject>
* <imageobject><imagedata fileref="up-start.png" format="PNG"/></imageobject>
* </inlinemediaobject>
* </entry>
* <entry>
* <inlinemediaobject>
* <imageobject><imagedata fileref="up-center.png" format="PNG"/></imageobject>
* </inlinemediaobject>
* </entry>
* <entry>
* <inlinemediaobject>
* <imageobject><imagedata fileref="up-end.png" format="PNG"/></imageobject>
* </inlinemediaobject>
* </entry>
* </row>
* </tbody>
* </tgroup>
* </informaltable>
* <informaltable>
* <tgroup cols="3">
* <tbody>
* <row>
* <entry></entry>
* <entry>direction = left</entry>
* <entry>direction = right</entry>
* </row>
* <row>
* <entry>valign = start</entry>
* <entry>
* <inlinemediaobject>
* <imageobject><imagedata fileref="left-start.png" format="PNG"/></imageobject>
* </inlinemediaobject>
* </entry>
* <entry>
* <inlinemediaobject>
* <imageobject><imagedata fileref="right-start.png" format="PNG"/></imageobject>
* </inlinemediaobject>
* </entry>
* </row>
* <row>
* <entry>valign = center</entry>
* <entry>
* <inlinemediaobject>
* <imageobject><imagedata fileref="left-center.png" format="PNG"/></imageobject>
* </inlinemediaobject>
* </entry>
* <entry>
* <inlinemediaobject>
* <imageobject><imagedata fileref="right-center.png" format="PNG"/></imageobject>
* </inlinemediaobject>
* </entry>
* </row>
* <row>
* <entry>valign = end</entry>
* <entry>
* <inlinemediaobject>
* <imageobject><imagedata fileref="left-end.png" format="PNG"/></imageobject>
* </inlinemediaobject>
* </entry>
* <entry>
* <inlinemediaobject>
* <imageobject><imagedata fileref="right-end.png" format="PNG"/></imageobject>
* </inlinemediaobject>
* </entry>
* </row>
* </tbody>
* </tgroup>
* </informaltable>
*/
#include "config.h"
#include "gtkmenubutton.h"
#include "gtkmenubuttonprivate.h"
#include "gtkarrow.h"
#include "gtktypebuiltins.h"
#include "gtkwindow.h"
#include "gtkmain.h"
#include "gtkprivate.h"
#include "gtkintl.h"
struct _GtkMenuButtonPrivate
{
GtkWidget *popup;
GMenuModel *model;
GtkMenuButtonShowMenuCallback func;
gpointer user_data;
GtkArrowType arrow_type;
GtkWidget *align_widget;
gpointer arrow_widget;
};
enum
{
PROP_0,
PROP_POPUP,
PROP_MODEL,
PROP_ALIGN_WIDGET,
PROP_DIRECTION
};
G_DEFINE_TYPE(GtkMenuButton, gtk_menu_button, GTK_TYPE_TOGGLE_BUTTON)
static void gtk_menu_button_dispose (GObject *object);
static void
gtk_menu_button_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkMenuButton *self = GTK_MENU_BUTTON (object);
switch (property_id)
{
case PROP_POPUP:
gtk_menu_button_set_popup (self, g_value_get_object (value));
break;
case PROP_MODEL:
gtk_menu_button_set_menu_model (self, g_value_get_object (value));
break;
case PROP_ALIGN_WIDGET:
gtk_menu_button_set_align_widget (self, g_value_get_object (value));
break;
case PROP_DIRECTION:
gtk_menu_button_set_direction (self, g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
gtk_menu_button_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkMenuButtonPrivate *priv = GTK_MENU_BUTTON (object)->priv;
switch (property_id)
{
case PROP_POPUP:
g_value_set_object (value, priv->popup);
break;
case PROP_MODEL:
g_value_set_object (value, priv->model);
break;
case PROP_ALIGN_WIDGET:
g_value_set_object (value, priv->align_widget);
break;
case PROP_DIRECTION:
g_value_set_enum (value, priv->arrow_type);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
gtk_menu_button_state_flags_changed (GtkWidget *widget,
GtkStateFlags previous_state_flags)
{
GtkMenuButton *button = GTK_MENU_BUTTON (widget);
GtkMenuButtonPrivate *priv = button->priv;
if (!gtk_widget_is_sensitive (widget) && priv->popup)
gtk_menu_shell_deactivate (GTK_MENU_SHELL (priv->popup));
}
static void
menu_position_up_down_func (GtkMenu *menu,
gint *x,
gint *y,
gboolean *push_in,
GtkMenuButton *menu_button)
{
GtkMenuButtonPrivate *priv = menu_button->priv;
GtkWidget *widget = GTK_WIDGET (menu_button);
GtkWidget *toplevel;
GtkRequisition menu_req;
GtkTextDirection direction;
GdkRectangle monitor;
gint monitor_num;
GdkScreen *screen;
GdkWindow *window;
GtkAllocation allocation, arrow_allocation;
GtkAlign align;
/* In the common case the menu button is showing a dropdown menu, set the
* corresponding type hint on the toplevel, so the WM can omit the top side
* of the shadows.
*/
if (priv->arrow_type == GTK_ARROW_DOWN)
{
toplevel = gtk_widget_get_toplevel (GTK_WIDGET (priv->popup));
gtk_window_set_type_hint (GTK_WINDOW (toplevel), GDK_WINDOW_TYPE_HINT_DROPDOWN_MENU);
}
gtk_widget_get_preferred_size (GTK_WIDGET (priv->popup),
&menu_req, NULL);
align = gtk_widget_get_halign (GTK_WIDGET (priv->popup));
direction = gtk_widget_get_direction (widget);
window = gtk_widget_get_window (priv->align_widget ? priv->align_widget : 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_workarea (screen, monitor_num, &monitor);
gtk_widget_get_allocation (priv->align_widget ? priv->align_widget : widget, &allocation);
gtk_widget_get_allocation (widget, &arrow_allocation);
gdk_window_get_origin (window, x, y);
*x += allocation.x;
*y += allocation.y;
/* treat the default align value like START */
if (align == GTK_ALIGN_FILL)
align = GTK_ALIGN_START;
if (align == GTK_ALIGN_CENTER)
*x -= (menu_req.width - allocation.width) / 2;
else if ((align == GTK_ALIGN_START && direction == GTK_TEXT_DIR_LTR) ||
(align == GTK_ALIGN_END && direction == GTK_TEXT_DIR_RTL))
*x += MAX (allocation.width - menu_req.width, 0);
else if (menu_req.width > allocation.width)
*x -= menu_req.width - allocation.width;
if (priv->arrow_type == GTK_ARROW_UP && *y - menu_req.height >= monitor.y)
{
*y -= menu_req.height;
}
else
{
if ((*y + arrow_allocation.height + menu_req.height) <= monitor.y + monitor.height)
*y += arrow_allocation.height;
else if ((*y - menu_req.height) >= monitor.y)
*y -= menu_req.height;
else if (monitor.y + monitor.height - (*y + arrow_allocation.height) > *y)
*y += arrow_allocation.height;
else
*y -= menu_req.height;
}
*push_in = FALSE;
}
static void
menu_position_side_func (GtkMenu *menu,
gint *x,
gint *y,
gboolean *push_in,
GtkMenuButton *menu_button)
{
GtkMenuButtonPrivate *priv = menu_button->priv;
GtkAllocation allocation;
GtkWidget *widget = GTK_WIDGET (menu_button);
GtkRequisition menu_req;
GdkRectangle monitor;
gint monitor_num;
GdkScreen *screen;
GdkWindow *window;
GtkAlign align;
GtkTextDirection direction;
gtk_widget_get_preferred_size (GTK_WIDGET (priv->popup),
&menu_req, NULL);
window = gtk_widget_get_window (widget);
direction = gtk_widget_get_direction (widget);
align = gtk_widget_get_valign (GTK_WIDGET (menu));
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_workarea (screen, monitor_num, &monitor);
gdk_window_get_origin (gtk_button_get_event_window (GTK_BUTTON (menu_button)), x, y);
gtk_widget_get_allocation (widget, &allocation);
if ((priv->arrow_type == GTK_ARROW_RIGHT && direction == GTK_TEXT_DIR_LTR) ||
(priv->arrow_type == GTK_ARROW_LEFT && direction == GTK_TEXT_DIR_RTL))
{
if (*x + allocation.width + menu_req.width <= monitor.x + monitor.width)
*x += allocation.width;
else
*x -= menu_req.width;
}
else
{
if (*x - menu_req.width >= monitor.x)
*x -= menu_req.width;
else
*x += allocation.width;
}
/* treat the default align value like START */
if (align == GTK_ALIGN_FILL)
align = GTK_ALIGN_START;
if (align == GTK_ALIGN_CENTER)
*y -= (menu_req.height - allocation.height) / 2;
else if (align == GTK_ALIGN_END)
*y -= menu_req.height - allocation.height;
*push_in = FALSE;
}
static void
popup_menu (GtkMenuButton *menu_button,
GdkEventButton *event)
{
GtkMenuButtonPrivate *priv = menu_button->priv;
GtkMenuPositionFunc func;
if (priv->func)
priv->func (priv->user_data);
if (!priv->popup)
return;
switch (priv->arrow_type)
{
case GTK_ARROW_LEFT:
case GTK_ARROW_RIGHT:
func = (GtkMenuPositionFunc) menu_position_side_func;
break;
default:
func = (GtkMenuPositionFunc) menu_position_up_down_func;
break;
}
gtk_menu_popup_for_device (GTK_MENU (priv->popup),
event ? event->device : NULL,
NULL, NULL,
func,
GTK_WIDGET (menu_button),
NULL,
event ? event->button : 0,
event ? event->time : gtk_get_current_event_time ());
}
static void
gtk_menu_button_toggled (GtkToggleButton *button)
{
GtkMenuButton *menu_button = GTK_MENU_BUTTON (button);
GtkMenuButtonPrivate *priv = menu_button->priv;
if (!priv->popup)
return;
if (gtk_toggle_button_get_active (button) &&
!gtk_widget_get_visible (GTK_WIDGET (priv->popup)))
{
/* we get here only when the menu is activated by a key
* press, so that we can select the first menu item
*/
popup_menu (menu_button, NULL);
gtk_menu_shell_select_first (GTK_MENU_SHELL (priv->popup), FALSE);
}
}
static gboolean
gtk_menu_button_button_press_event (GtkWidget *widget,
GdkEventButton *event)
{
if (event->button == GDK_BUTTON_PRIMARY)
{
popup_menu (GTK_MENU_BUTTON (widget), event);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (widget), TRUE);
return TRUE;
}
return GTK_WIDGET_CLASS (gtk_menu_button_parent_class)->button_press_event (widget, event);
}
static void
gtk_menu_button_add (GtkContainer *container,
GtkWidget *child)
{
GtkMenuButton *button = GTK_MENU_BUTTON (container);
if (button->priv->arrow_widget)
gtk_container_remove (container, button->priv->arrow_widget);
GTK_CONTAINER_CLASS (gtk_menu_button_parent_class)->add (container, child);
}
static void
gtk_menu_button_remove (GtkContainer *container,
GtkWidget *child)
{
GtkMenuButton *button = GTK_MENU_BUTTON (container);
if (child == button->priv->arrow_widget)
button->priv->arrow_widget = NULL;
GTK_CONTAINER_CLASS (gtk_menu_button_parent_class)->remove (container, child);
}
static void
gtk_menu_button_class_init (GtkMenuButtonClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
GtkToggleButtonClass *toggle_button_class = GTK_TOGGLE_BUTTON_CLASS (klass);
g_type_class_add_private (klass, sizeof (GtkMenuButtonPrivate));
gobject_class->set_property = gtk_menu_button_set_property;
gobject_class->get_property = gtk_menu_button_get_property;
gobject_class->dispose = gtk_menu_button_dispose;
widget_class->state_flags_changed = gtk_menu_button_state_flags_changed;
widget_class->button_press_event = gtk_menu_button_button_press_event;
container_class->add = gtk_menu_button_add;
container_class->remove = gtk_menu_button_remove;
toggle_button_class->toggled = gtk_menu_button_toggled;
/**
* GtkMenuButton:popup:
*
* The #GtkMenu that will be popped up when the button is clicked.
*
* Since: 3.6
*/
g_object_class_install_property (gobject_class,
PROP_POPUP,
g_param_spec_object ("popup",
P_("popup"),
P_("The dropdown menu."),
GTK_TYPE_MENU,
G_PARAM_READWRITE));
/**
* GtkMenuButton:menu-model:
*
* The #GMenuModel from which the menu to pop up will be created.
* See gtk_menu_button_set_menu_model() for the interaction with the
* #GtkMenuButton:popup property.
*
* Since: 3.6
*/
g_object_class_install_property (gobject_class,
PROP_MODEL,
g_param_spec_object ("menu-model",
P_("menu-model"),
P_("The dropdown menu's model."),
G_TYPE_MENU_MODEL,
G_PARAM_READWRITE));
/**
* GtkMenuButton:align-widget:
*
* The #GtkWidget to use to align the popup menu with.
*
* Since: 3.6
*/
g_object_class_install_property (gobject_class,
PROP_ALIGN_WIDGET,
g_param_spec_object ("align-widget",
P_("align-widget"),
P_("The parent widget which the menu should align with."),
GTK_TYPE_CONTAINER,
G_PARAM_READWRITE));
/**
* GtkMenuButton:direction:
*
* The #GtkArrowType representing the direction in which the
* menu will be popped out.
*
* Since: 3.6
*/
g_object_class_install_property (gobject_class,
PROP_DIRECTION,
g_param_spec_enum ("direction",
P_("direction"),
P_("The direction the arrow should point."),
GTK_TYPE_ARROW_TYPE,
GTK_ARROW_DOWN,
G_PARAM_READWRITE));
}
static void
add_arrow (GtkMenuButton *menu_button)
{
GtkWidget *arrow;
arrow = gtk_arrow_new (menu_button->priv->arrow_type, GTK_SHADOW_NONE);
gtk_container_add (GTK_CONTAINER (menu_button), arrow);
gtk_widget_show (arrow);
menu_button->priv->arrow_widget = arrow;
}
static void
gtk_menu_button_init (GtkMenuButton *menu_button)
{
GtkMenuButtonPrivate *priv;
priv = G_TYPE_INSTANCE_GET_PRIVATE (menu_button, GTK_TYPE_MENU_BUTTON, GtkMenuButtonPrivate);
menu_button->priv = priv;
priv->arrow_type = GTK_ARROW_DOWN;
add_arrow (menu_button);
gtk_widget_set_sensitive (GTK_WIDGET (menu_button), FALSE);
}
/**
* gtk_menu_button_new:
*
* Creates a new #GtkMenuButton widget with downwards-pointing
* arrow as the only child. You can replace the child widget
* with another #GtkWidget should you wish to.
*
* Returns: The newly created #GtkMenuButton widget.
*
* Since: 3.6
*/
GtkWidget *
gtk_menu_button_new (void)
{
return g_object_new (GTK_TYPE_MENU_BUTTON, NULL);
}
/* 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,
GtkMenuButton *menu_button)
{
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (menu_button), FALSE);
return TRUE;
}
static void
menu_detacher (GtkWidget *widget,
GtkMenu *menu)
{
GtkMenuButtonPrivate *priv = GTK_MENU_BUTTON (widget)->priv;
g_return_if_fail (priv->popup == (GtkWidget *) menu);
priv->popup = NULL;
}
/* This function is used in GtkMenuToolButton, the call back will
* be called when GtkMenuToolButton would have emitted the "show-menu"
* signal.
*/
void
_gtk_menu_button_set_popup_with_func (GtkMenuButton *menu_button,
GtkWidget *menu,
GtkMenuButtonShowMenuCallback func,
gpointer user_data)
{
GtkMenuButtonPrivate *priv;
g_return_if_fail (GTK_IS_MENU_BUTTON (menu_button));
g_return_if_fail (GTK_IS_MENU (menu) || menu == NULL);
priv = menu_button->priv;
priv->func = func;
priv->user_data = user_data;
if (priv->popup == GTK_WIDGET (menu))
return;
if (priv->popup)
{
if (gtk_widget_get_visible (GTK_WIDGET (priv->popup)))
gtk_menu_shell_deactivate (GTK_MENU_SHELL (priv->popup));
}
if (priv->popup)
{
g_signal_handlers_disconnect_by_func (priv->popup,
menu_deactivate_cb,
menu_button);
gtk_menu_detach (GTK_MENU (priv->popup));
}
priv->popup = menu;
if (priv->popup)
{
gtk_menu_attach_to_widget (GTK_MENU (priv->popup), GTK_WIDGET (menu_button),
menu_detacher);
gtk_widget_set_sensitive (GTK_WIDGET (menu_button), TRUE);
g_signal_connect (priv->popup, "deactivate",
G_CALLBACK (menu_deactivate_cb), menu_button);
}
else
{
gtk_widget_set_sensitive (GTK_WIDGET (menu_button), FALSE);
}
g_object_notify (G_OBJECT (menu_button), "popup");
g_object_notify (G_OBJECT (menu_button), "menu-model");
}
/**
* gtk_menu_button_set_popup:
* @menu_button: a #GtkMenuButton
* @popup: (allow-none): a #GtkMenu
*
* Sets the #GtkMenu that will be popped up when the button is clicked,
* or %NULL to disable the button. If #GtkMenuButton:menu-model is set,
* it will be set to %NULL.
*
* Since: 3.6
*/
void
gtk_menu_button_set_popup (GtkMenuButton *menu_button,
GtkWidget *popup)
{
GtkMenuButtonPrivate *priv;
g_return_if_fail (GTK_IS_MENU_BUTTON (menu_button));
g_return_if_fail (GTK_IS_MENU (popup) || popup == NULL);
priv = menu_button->priv;
g_clear_object (&priv->model);
_gtk_menu_button_set_popup_with_func (menu_button, popup, NULL, NULL);
}
/**
* gtk_menu_button_get_popup:
* @menu_button: a #GtkMenuButton
*
* Returns the #GtkMenu that pops out of the button.
*
* Returns: (transfer none): a #GtkMenu or %NULL.
*
* Since: 3.6
*/
GtkMenu *
gtk_menu_button_get_popup (GtkMenuButton *menu_button)
{
g_return_val_if_fail (GTK_IS_MENU_BUTTON (menu_button), NULL);
return GTK_MENU (menu_button->priv->popup);
}
/**
* gtk_menu_button_set_menu_model:
* @menu_button: a #GtkMenuButton
* @menu_model: (allow-none): a #GMenuModel
*
* Sets the #GMenuModel from which the #GtkMenuButton:popup property will be
* filled in, or %NULL to disable the button.
*
* The #GtkMenu will be created with gtk_menu_new_from_model(), so actions
* will be connected as documented there.
*
* If #GtkMenuButton:popup is already set, then its content will be lost
* and replaced by our newly created #GtkMenu.
*
* Since: 3.6
*/
void
gtk_menu_button_set_menu_model (GtkMenuButton *menu_button,
GMenuModel *menu_model)
{
GtkMenuButtonPrivate *priv;
GtkWidget *menu;
g_return_if_fail (GTK_IS_MENU_BUTTON (menu_button));
g_return_if_fail (G_IS_MENU_MODEL (menu_model) || menu_model == NULL);
priv = menu_button->priv;
g_clear_object (&priv->model);
if (menu_model == NULL)
{
gtk_menu_button_set_popup (menu_button, NULL);
return;
}
priv->model = g_object_ref (menu_model);
menu = gtk_menu_new_from_model (menu_model);
gtk_widget_show_all (menu);
gtk_menu_button_set_popup (menu_button, menu);
}
/**
* gtk_menu_button_get_menu_model:
* @menu_button: a #GtkMenuButton
*
* Returns the #GMenuModel used to generate the menu.
*
* Returns: (transfer none): a #GMenuModel or %NULL.
*
* Since: 3.6
*/
GMenuModel *
gtk_menu_button_get_menu_model (GtkMenuButton *menu_button)
{
g_return_val_if_fail (GTK_IS_MENU_BUTTON (menu_button), NULL);
return menu_button->priv->model;
}
static void
set_align_widget_pointer (GtkMenuButton *menu_button,
GtkWidget *align_widget)
{
GtkMenuButtonPrivate *priv;
priv = menu_button->priv;
if (priv->align_widget)
g_object_remove_weak_pointer (G_OBJECT (priv->align_widget), (gpointer *) &priv->align_widget);
priv->align_widget = align_widget;
if (align_widget)
g_object_add_weak_pointer (G_OBJECT (priv->align_widget), (gpointer *) &priv->align_widget);
}
/**
* gtk_menu_button_set_align_widget:
* @menu_button: a #GtkMenuButton
* @align_widget: (allow-none): a #GtkWidget
*
* Sets the #GtkWidget to use to line the menu with when popped up. Note that
* the @align_widget must contain the #GtkMenuButton itself.
*
* Setting it to %NULL means that the popup menu will be aligned with the
* button itself.
*
* Since: 3.6
*/
void
gtk_menu_button_set_align_widget (GtkMenuButton *menu_button,
GtkWidget *align_widget)
{
GtkMenuButtonPrivate *priv;
g_return_if_fail (GTK_IS_MENU_BUTTON (menu_button));
g_return_if_fail (align_widget == NULL || gtk_widget_is_ancestor (GTK_WIDGET (menu_button), align_widget));
priv = menu_button->priv;
if (priv->align_widget == align_widget)
return;
set_align_widget_pointer (menu_button, align_widget);
g_object_notify (G_OBJECT (menu_button), "align-widget");
}
/**
* gtk_menu_button_get_align_widget:
* @menu_button: a #GtkMenuButton
*
* Returns the parent #GtkWidget to use to line up with menu.
*
* Returns: (transfer none): a #GtkWidget value or %NULL.
*
* Since: 3.6
*/
GtkWidget *
gtk_menu_button_get_align_widget (GtkMenuButton *menu_button)
{
g_return_val_if_fail (GTK_IS_MENU_BUTTON (menu_button), NULL);
return menu_button->priv->align_widget;
}
/**
* gtk_menu_button_set_direction:
* @menu_button: a #GtkMenuButton
* @direction: a #GtkArrowType
*
* Sets the direction in which the menu will be popped up, as
* well as changing the arrow's direction. The child will not
* be changed to an arrow if it was customized.
*
* If the menu when popped out would have collided with screen edges,
* we will do our best to keep it inside the screen and fully visible.
*
* If you pass %GTK_ARROW_NONE for a @direction, the menu will behave
* as if you passed %GTK_ARROW_DOWN (although you won't see any arrows).
*
* Since: 3.6
*/
void
gtk_menu_button_set_direction (GtkMenuButton *menu_button,
GtkArrowType direction)
{
GtkMenuButtonPrivate *priv = menu_button->priv;
GtkWidget *child;
g_return_if_fail (GTK_IS_MENU_BUTTON (menu_button));
if (priv->arrow_type == direction)
return;
priv->arrow_type = direction;
/* Is it custom content? We don't change that */
child = gtk_bin_get_child (GTK_BIN (menu_button));
if (priv->arrow_widget != child)
return;
gtk_arrow_set (GTK_ARROW (child), priv->arrow_type, GTK_SHADOW_NONE);
}
/**
* gtk_menu_button_get_direction:
* @menu_button: a #GtkMenuButton
*
* Returns the direction the menu will be pointing at when popped up.
*
* Returns: a #GtkArrowType value.
*
* Since: 3.6
*/
GtkArrowType
gtk_menu_button_get_direction (GtkMenuButton *menu_button)
{
g_return_val_if_fail (GTK_IS_MENU_BUTTON (menu_button), GTK_ARROW_DOWN);
return menu_button->priv->arrow_type;
}
static void
gtk_menu_button_dispose (GObject *object)
{
GtkMenuButtonPrivate *priv = GTK_MENU_BUTTON (object)->priv;
if (priv->popup)
{
g_signal_handlers_disconnect_by_func (priv->popup,
menu_deactivate_cb,
object);
gtk_menu_detach (GTK_MENU (priv->popup));
priv->popup = NULL;
}
set_align_widget_pointer (GTK_MENU_BUTTON (object), NULL);
g_clear_object (&priv->model);
G_OBJECT_CLASS (gtk_menu_button_parent_class)->dispose (object);
}
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