forked from AuroraMiddleware/gtk
126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
/*
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* Copyright © 2018 Benjamin Otte
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#include "config.h"
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#include "gtkrootprivate.h"
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/**
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* SECTION:root
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* @Title: GtkRoot
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* @Short_description: Root widgets
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* @See_also: #GtkWindow
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*
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* #GtkRoot is the interface implemented by all widgets that can act as a toplevel
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* widget to a hierarchy of widgets. The root widget takes care of providing the
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* connection to the windowing system and manages layout, drawing and event delivery
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* for its widget hierarchy.
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*
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* The obvious example of a #GtkRoot is #GtkWindow.
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*/
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G_DEFINE_INTERFACE (GtkRoot, gtk_root, GTK_TYPE_WIDGET)
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static GdkDisplay *
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gtk_root_default_get_display (GtkRoot *self)
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{
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return gdk_display_get_default ();
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}
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static GskRenderer *
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gtk_root_default_get_renderer (GtkRoot *self)
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{
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return NULL;
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}
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static void
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gtk_root_default_get_surface_transform (GtkRoot *self,
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int *x,
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int *y)
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{
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*x = 0;
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*y = 0;
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}
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static void
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gtk_root_default_init (GtkRootInterface *iface)
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{
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iface->get_display = gtk_root_default_get_display;
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iface->get_renderer = gtk_root_default_get_renderer;
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iface->get_surface_transform = gtk_root_default_get_surface_transform;
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}
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GdkDisplay *
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gtk_root_get_display (GtkRoot *self)
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{
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GtkRootInterface *iface;
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g_return_val_if_fail (GTK_IS_ROOT (self), NULL);
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iface = GTK_ROOT_GET_IFACE (self);
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return iface->get_display (self);
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}
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GskRenderer *
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gtk_root_get_renderer (GtkRoot *self)
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{
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GtkRootInterface *iface;
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g_return_val_if_fail (GTK_IS_ROOT (self), NULL);
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iface = GTK_ROOT_GET_IFACE (self);
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return iface->get_renderer (self);
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}
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void
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gtk_root_get_surface_transform (GtkRoot *self,
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int *x,
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int *y)
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{
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GtkRootInterface *iface;
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g_return_if_fail (GTK_IS_ROOT (self));
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g_return_if_fail (x != 0);
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g_return_if_fail (y != 0);
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iface = GTK_ROOT_GET_IFACE (self);
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return iface->get_surface_transform (self, x, y);
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}
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/**
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* gtk_root_get_for_surface:
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* @surface: a #GdkSurface
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*
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* Finds the GtkRoot associated with the surface.
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*
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* Returns: (transfer none): the #GtkRoot that is associated with @surface
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*/
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GtkWidget *
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gtk_root_get_for_surface (GdkSurface *surface)
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{
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gpointer user_data;
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gdk_surface_get_user_data (surface, &user_data);
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if (user_data && GTK_IS_ROOT (user_data))
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return GTK_WIDGET (user_data);
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return NULL;
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}
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