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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef UI_GFX_GTK_PRESERVE_WINDOW_H_
      6 #define UI_GFX_GTK_PRESERVE_WINDOW_H_
      7 
      8 #include <atk/atk.h>
      9 #include <gdk/gdk.h>
     10 #include <gtk/gtk.h>
     11 
     12 #include "ui/gfx/gfx_export.h"
     13 
     14 // GtkFixed creates an X window when realized and destroys an X window
     15 // when unrealized. GtkPreserveWindow allows overrides this
     16 // behaviour. When preserve is set (via gtk_preserve_window_set_preserve),
     17 // the X window is only destroyed when the widget is destroyed.
     18 
     19 G_BEGIN_DECLS
     20 
     21 #define GTK_TYPE_PRESERVE_WINDOW                                 \
     22     (gtk_preserve_window_get_type())
     23 #define GTK_PRESERVE_WINDOW(obj)                                 \
     24     (G_TYPE_CHECK_INSTANCE_CAST((obj), GTK_TYPE_PRESERVE_WINDOW, \
     25                                 GtkPreserveWindow))
     26 #define GTK_PRESERVE_WINDOW_CLASS(klass)                         \
     27     (G_TYPE_CHECK_CLASS_CAST((klass), GTK_TYPE_PRESERVE_WINDOW,  \
     28                              GtkPreserveWindowClass))
     29 #define GTK_IS_PRESERVE_WINDOW(obj)                              \
     30     (G_TYPE_CHECK_INSTANCE_TYPE((obj), GTK_TYPE_PRESERVE_WINDOW))
     31 #define GTK_IS_PRESERVE_WINDOW_CLASS(klass)                      \
     32     (G_TYPE_CHECK_CLASS_TYPE((klass), GTK_TYPE_PRESERVE_WINDOW))
     33 #define GTK_PRESERVE_WINDOW_GET_CLASS(obj)                       \
     34     (G_TYPE_INSTANCE_GET_CLASS((obj), GTK_TYPE_PRESERVE_WINDOW,  \
     35                                GtkPreserveWindowClass))
     36 
     37 typedef struct _GtkPreserveWindow GtkPreserveWindow;
     38 typedef struct _GtkPreserveWindowClass GtkPreserveWindowClass;
     39 
     40 struct _GtkPreserveWindow {
     41   // Parent class.
     42   GtkFixed fixed;
     43 };
     44 
     45 struct _GtkPreserveWindowClass {
     46   GtkFixedClass parent_class;
     47 };
     48 
     49 GFX_EXPORT GType gtk_preserve_window_get_type() G_GNUC_CONST;
     50 GFX_EXPORT GtkWidget* gtk_preserve_window_new();
     51 
     52 // Whether or not we should preserve associated windows as the widget
     53 // is realized or unrealized.
     54 GFX_EXPORT gboolean gtk_preserve_window_get_preserve(GtkPreserveWindow* widget);
     55 GFX_EXPORT void gtk_preserve_window_set_preserve(GtkPreserveWindow* widget,
     56                                                  gboolean value);
     57 
     58 // Whether or not someone else will gdk_window_resize the GdkWindow associated
     59 // with this widget (needed by the GPU process to synchronize resizing
     60 // with swapped between front and back buffer).
     61 GFX_EXPORT void gtk_preserve_window_delegate_resize(GtkPreserveWindow* widget,
     62                                                     gboolean delegate);
     63 
     64 // Provide a function to return an AtkObject* when calls to get_accessible
     65 // are made on this widget. The parameter |userdata| will be passed to the
     66 // factory function.
     67 GFX_EXPORT void gtk_preserve_window_set_accessible_factory(
     68     GtkPreserveWindow* widget,
     69     AtkObject* (*factory)(void* userdata),
     70     gpointer userdata);
     71 
     72 G_END_DECLS
     73 
     74 #endif  // UI_GFX_GTK_PRESERVE_WINDOW_H_
     75