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/*
* Copyright © 2018 Benjamin Otte
*
* 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 2.1 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/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gtkrootprivate.h"
#include "gdk/gdk-private.h"
#include "gtkprivate.h"
#include "gtkintl.h"
/**
* SECTION:gtkroot
* @Title: GtkRoot
* @Short_description: Interface for root widgets
* @See_also: #GtkWindow
*
* #GtkRoot is the interface implemented by all widgets that can act as a toplevel
* widget to a hierarchy of widgets. The root widget takes care of providing the
* connection to the windowing system and manages layout, drawing and event delivery
* for its widget hierarchy.
*
* The obvious example of a #GtkRoot is #GtkWindow.
*/
G_DEFINE_INTERFACE (GtkRoot, gtk_root, GTK_TYPE_WIDGET)
static GdkDisplay *
gtk_root_default_get_display (GtkRoot *self)
{
return gdk_display_get_default ();
}
static GskRenderer *
gtk_root_default_get_renderer (GtkRoot *self)
{
return NULL;
}
static void
gtk_root_default_get_surface_transform (GtkRoot *self,
int *x,
int *y)
{
*x = 0;
*y = 0;
}
static void
gtk_root_default_init (GtkRootInterface *iface)
{
iface->get_display = gtk_root_default_get_display;
iface->get_renderer = gtk_root_default_get_renderer;
iface->get_surface_transform = gtk_root_default_get_surface_transform;
g_object_interface_install_property (iface,
g_param_spec_object ("focus-widget",
P_("Focus widget"),
P_("The focus widget"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
}
GdkDisplay *
gtk_root_get_display (GtkRoot *self)
{
GtkRootInterface *iface;
g_return_val_if_fail (GTK_IS_ROOT (self), NULL);
iface = GTK_ROOT_GET_IFACE (self);
return iface->get_display (self);
}
GskRenderer *
gtk_root_get_renderer (GtkRoot *self)
{
GtkRootInterface *iface;
g_return_val_if_fail (GTK_IS_ROOT (self), NULL);
iface = GTK_ROOT_GET_IFACE (self);
return iface->get_renderer (self);
}
void
gtk_root_get_surface_transform (GtkRoot *self,
int *x,
int *y)
{
GtkRootInterface *iface;
g_return_if_fail (GTK_IS_ROOT (self));
g_return_if_fail (x != 0);
g_return_if_fail (y != 0);
iface = GTK_ROOT_GET_IFACE (self);
return iface->get_surface_transform (self, x, y);
}
/**
* gtk_root_get_for_surface:
* @surface: a #GdkSurface
*
* Finds the GtkRoot associated with the surface.
*
* Returns: (transfer none): the #GtkRoot that is associated with @surface
*/
GtkWidget *
gtk_root_get_for_surface (GdkSurface *surface)
{
GtkWidget *widget;
widget = (GtkWidget *)gdk_surface_get_widget (surface);
if (widget && GTK_IS_ROOT (widget))
return widget;
return NULL;
}
/**
* gtk_root_set_focus:
* @self: a #GtkRoot
* @focus: (allow-none): widget to be the new focus widget, or %NULL
* to unset the focus widget
*
* If @focus is not the current focus widget, and is focusable, sets
* it as the focus widget for the root. If @focus is %NULL, unsets
* the focus widget for the root.
*
* To set the focus to a particular widget in the root, it is usually
* more convenient to use gtk_widget_grab_focus() instead of this function.
*/
void
gtk_root_set_focus (GtkRoot *self,
GtkWidget *focus)
{
g_return_if_fail (GTK_IS_ROOT (self));
g_return_if_fail (focus == NULL || GTK_IS_WIDGET (focus));
g_object_set (self, "focus-widget", focus, NULL);
}
/**
* gtk_root_get_focus:
* @self: a #GtkRoot
*
* Retrieves the current focused widget within the root.
*
* Note that this is the widget that would have the focus
* if the root is active; if the root is not focused then
* `gtk_widget_has_focus (widget)` will be %FALSE for the
* widget.
*
* Returns: (nullable) (transfer none): the currently focused widget,
* or %NULL if there is none.
*/
GtkWidget *
gtk_root_get_focus (GtkRoot *self)
{
GtkWidget *focus;
g_return_val_if_fail (GTK_IS_ROOT (self), NULL);
g_object_get (self, "focus-widget", &focus, NULL);
if (focus)
g_object_unref (focus);
return focus;
}
guint
gtk_root_install_properties (GObjectClass *object_class,
guint first_prop)
{
g_object_class_override_property (object_class, first_prop + GTK_ROOT_PROP_FOCUS_WIDGET, "focus-widget");
return GTK_ROOT_NUM_PROPERTIES;
}
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