/* GTK - The GIMP Toolkit
* Copyright © 2014 Red Hat, Inc.
*
* 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 .
*/
#include "config.h"
#include "gtkpopovermenu.h"
#include "gtkstack.h"
#include "gtkstylecontext.h"
#include "gtkintl.h"
/**
* SECTION:gtkpopovermenu
* @Short_description: Popovers to use as menus
* @Title: GtkPopoverMenu
*
* GtkPopoverMenu is a subclass of #GtkPopover that treats its
* children like menus and allows switching between them. It is
* meant to be used primarily together with #GtkModelButton, but
* any widget can be used, such as #GtkSpinButton or #GtkScale.
* In this respect, GtkPopoverMenu is more flexible than popovers
* that are created from a #GMenuModel with gtk_popover_new_from_model().
*
* To add a child as a submenu, set the #GtkPopoverMenu:submenu
* child property to the name of the submenu. To let the user open
* this submenu, add a #GtkModelButton whose #GtkModelButton:menu-name
* property is set to the name you've given to the submenu.
*
* By convention, the first child of a submenu should be a #GtkModelButton
* to switch back to the parent menu. Such a button should use the
* #GtkModelButton:inverted and #GtkModelButton:centered properties
* to achieve a title-like appearance and place the submenu indicator
* at the opposite side. To switch back to the main menu, use "main"
* as the menu name.
*
* # Example
*
* |[
*
* ]|
*
* Just like normal popovers created using gtk_popover_new_from_model,
* #GtkPopoverMenu instances have a single css node called "popover"
* and get the .menu style class.
*/
struct _GtkPopoverMenu
{
GtkPopover parent_instance;
};
enum {
PROP_VISIBLE_SUBMENU = 1
};
enum {
CHILD_PROP_SUBMENU = 1,
CHILD_PROP_POSITION
};
G_DEFINE_TYPE (GtkPopoverMenu, gtk_popover_menu, GTK_TYPE_POPOVER)
static void
visible_submenu_changed (GObject *object,
GParamSpec *pspec,
GtkPopoverMenu *popover)
{
g_object_notify (G_OBJECT (popover), "visible-submenu");
}
static void
gtk_popover_menu_init (GtkPopoverMenu *popover)
{
GtkWidget *stack;
GtkStyleContext *style_context;
stack = gtk_stack_new ();
gtk_stack_set_vhomogeneous (GTK_STACK (stack), FALSE);
gtk_stack_set_transition_type (GTK_STACK (stack), GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT_RIGHT);
gtk_stack_set_interpolate_size (GTK_STACK (stack), TRUE);
gtk_widget_show (stack);
gtk_container_add (GTK_CONTAINER (popover), stack);
g_signal_connect (stack, "notify::visible-child-name",
G_CALLBACK (visible_submenu_changed), popover);
style_context = gtk_widget_get_style_context (GTK_WIDGET (popover));
gtk_style_context_add_class (style_context, GTK_STYLE_CLASS_MENU);
}
static void
gtk_popover_menu_map (GtkWidget *widget)
{
GTK_WIDGET_CLASS (gtk_popover_menu_parent_class)->map (widget);
gtk_popover_menu_open_submenu (GTK_POPOVER_MENU (widget), "main");
}
static void
gtk_popover_menu_unmap (GtkWidget *widget)
{
gtk_popover_menu_open_submenu (GTK_POPOVER_MENU (widget), "main");
GTK_WIDGET_CLASS (gtk_popover_menu_parent_class)->unmap (widget);
}
static void
gtk_popover_menu_add (GtkContainer *container,
GtkWidget *child)
{
GtkWidget *stack;
stack = gtk_bin_get_child (GTK_BIN (container));
if (stack == NULL)
{
gtk_widget_set_parent (child, GTK_WIDGET (container));
_gtk_bin_set_child (GTK_BIN (container), child);
}
else
{
gchar *name;
if (gtk_stack_get_child_by_name (GTK_STACK (stack), "main"))
name = "submenu";
else
name = "main";
gtk_stack_add_named (GTK_STACK (stack), child, name);
}
}
static void
gtk_popover_menu_remove (GtkContainer *container,
GtkWidget *child)
{
GtkWidget *stack;
stack = gtk_bin_get_child (GTK_BIN (container));
if (child == stack)
GTK_CONTAINER_CLASS (gtk_popover_menu_parent_class)->remove (container, child);
else
gtk_container_remove (GTK_CONTAINER (stack), child);
}
static void
gtk_popover_menu_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GtkWidget *stack;
stack = gtk_bin_get_child (GTK_BIN (container));
if (include_internals)
(* callback) (stack, callback_data);
gtk_container_forall (GTK_CONTAINER (stack), callback, callback_data);
}
static void
gtk_popover_menu_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkWidget *stack;
stack = gtk_bin_get_child (GTK_BIN (container));
if (child == stack)
return;
switch (property_id)
{
case CHILD_PROP_SUBMENU:
{
gchar *name;
gtk_container_child_get (GTK_CONTAINER (stack), child, "name", &name, NULL);
g_value_set_string (value, name);
}
break;
case CHILD_PROP_POSITION:
{
gint position;
gtk_container_child_get (GTK_CONTAINER (stack), child, "position", &position, NULL);
g_value_set_int (value, position);
}
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static void
gtk_popover_menu_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkWidget *stack;
stack = gtk_bin_get_child (GTK_BIN (container));
if (child == stack)
return;
switch (property_id)
{
case CHILD_PROP_SUBMENU:
{
const gchar *name;
name = g_value_get_string (value);
gtk_container_child_set (GTK_CONTAINER (stack), child, "name", name, NULL);
}
break;
case CHILD_PROP_POSITION:
{
gint position;
position = g_value_get_int (value);
gtk_container_child_set (GTK_CONTAINER (stack), child, "position", position, NULL);
}
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static void
gtk_popover_menu_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkWidget *stack;
stack = gtk_bin_get_child (GTK_BIN (object));
switch (property_id)
{
case PROP_VISIBLE_SUBMENU:
g_value_set_string (value, gtk_stack_get_visible_child_name (GTK_STACK (stack)));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_popover_menu_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkWidget *stack;
stack = gtk_bin_get_child (GTK_BIN (object));
switch (property_id)
{
case PROP_VISIBLE_SUBMENU:
gtk_stack_set_visible_child_name (GTK_STACK (stack), g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_popover_menu_class_init (GtkPopoverMenuClass *klass)
{
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->set_property = gtk_popover_menu_set_property;
object_class->get_property = gtk_popover_menu_get_property;
widget_class->map = gtk_popover_menu_map;
widget_class->unmap = gtk_popover_menu_unmap;
container_class->add = gtk_popover_menu_add;
container_class->remove = gtk_popover_menu_remove;
container_class->forall = gtk_popover_menu_forall;
container_class->set_child_property = gtk_popover_menu_set_child_property;
container_class->get_child_property = gtk_popover_menu_get_child_property;
g_object_class_install_property (object_class,
PROP_VISIBLE_SUBMENU,
g_param_spec_string ("visible-submenu",
P_("Visible submenu"),
P_("The name of the visible submenu"),
NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GtkPopoverMenu:submenu:
*
* The submenu child property specifies the name of the submenu
* If it is %NULL or "main", the child is used as the main menu,
* which is shown initially when the popover is mapped.
*
* Since: 3.16
*/
gtk_container_class_install_child_property (container_class,
CHILD_PROP_SUBMENU,
g_param_spec_string ("submenu",
P_("Submenu"),
P_("The name of the submenu"),
NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_POSITION,
g_param_spec_int ("position",
P_("Position"),
P_("The index of the child in the parent"),
-1, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
/**
* gtk_popover_menu_new:
*
* Creates a new popover menu.
*
* Returns: a new #GtkPopoverMenu
*
* Since: 3.16
*/
GtkWidget *
gtk_popover_menu_new (void)
{
return g_object_new (GTK_TYPE_POPOVER_MENU, NULL);
}
/**
* gtk_popover_menu_open_submenu:
* @popover: a #GtkPopoverMenu
* @name: the name of the menu to switch to
*
* Opens a submenu of the @popover. The @name
* must be one of the names given to the submenus
* of @popover with #GtkPopoverMenu:submenu, or
* "main" to switch back to the main menu.
*
* #GtkModelButton will open submenus automatically
* when the #GtkModelButton:menu-name property is set,
* so this function is only needed when you are using
* other kinds of widgets to initiate menu changes.
*
* Since: 3.16
*/
void
gtk_popover_menu_open_submenu (GtkPopoverMenu *popover,
const gchar *name)
{
GtkWidget *stack;
g_return_if_fail (GTK_IS_POPOVER_MENU (popover));
stack = gtk_bin_get_child (GTK_BIN (popover));
gtk_stack_set_visible_child_name (GTK_STACK (stack), name);
}