Draggable region support for frameless app window on GTK.

chrome/browser/ui/gtk/extensions/shell_window_gtk.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_GTK_EXTENSIONS_SHELL_WINDOW_GTK_H_
 #define CHROME_BROWSER_UI_GTK_EXTENSIONS_SHELL_WINDOW_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include "chrome/browser/ui/extensions/shell_window.h"
 #include "chrome/browser/ui/gtk/extensions/extension_view_gtk.h"
 #include "ui/base/gtk/gtk_signal.h"
 #include "ui/base/x/active_window_watcher_x_observer.h"
 #include "ui/gfx/rect.h"
+#include "third_party/skia/include/core/SkRegion.h"
 
 class Profile;
 
 namespace extensions {
 class Extension;
+struct DraggableRegion;
 }
 
 class ShellWindowGtk : public ShellWindow,
                        public ExtensionViewGtk::Container,
                        public ui::ActiveWindowWatcherXObserver {
  public:
   ShellWindowGtk(Profile* profile,
                  const extensions::Extension* extension,
                  const GURL& url,
                  const CreateParams& params);
@@ skipping 18 matching lines @@
   virtual void FlashFrame(bool flash) OVERRIDE;
   virtual bool IsAlwaysOnTop() const OVERRIDE;
 
   // ActiveWindowWatcherXObserver implementation.
   virtual void ActiveWindowChanged(GdkWindow* active_window) OVERRIDE;
 
  private:
   // ShellWindow implementation.
   virtual void SetFullscreen(bool fullscreen) OVERRIDE;
   virtual bool IsFullscreenOrPending() const OVERRIDE;
+  virtual void UpdateDraggableRegions(
+      const std::vector<extensions::DraggableRegion>& regions) OVERRIDE;
 
   virtual ~ShellWindowGtk();
 
   CHROMEGTK_CALLBACK_1(ShellWindowGtk, gboolean, OnMainWindowDeleteEvent,
                        GdkEvent*);
   CHROMEGTK_CALLBACK_1(ShellWindowGtk, gboolean, OnConfigure,
                        GdkEventConfigure*);
   CHROMEGTK_CALLBACK_1(ShellWindowGtk, gboolean, OnWindowState,
                        GdkEventWindowState*);
+  CHROMEGTK_CALLBACK_1(ShellWindowGtk, gboolean, OnButtonPress,
+                       GdkEventButton*);
 
   GtkWindow* window_;
   GdkWindowState state_;
 
   // True if the window manager thinks the window is active.  Not all window
   // managers keep track of this state (_NET_ACTIVE_WINDOW), in which case
   // this will always be true.
   bool is_active_;
 
   // The position and size of the current window.
   gfx::Rect bounds_;
 
   // The position and size of the non-maximized, non-fullscreen window.
   gfx::Rect restored_bounds_;
 
   // True if the RVH is in fullscreen mode. The window may not actually be in
   // fullscreen, however: some WMs don't support fullscreen.
   bool content_thinks_its_fullscreen_;
 
+  // The region is treated as title bar, can be dragged to move,
+  // double clicked to maximize, and right clicked to open context menu.
+  scoped_ptr<SkRegion> draggable_region_;

[Evan Stade, 2012/08/08 21:01:42]

why isn't this just an SkRegion? (empty by default)

+
+  // True if the window shows without frame.
+  bool frameless_;
+
   DISALLOW_COPY_AND_ASSIGN(ShellWindowGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_EXTENSIONS_SHELL_WINDOW_GTK_H_