Draggable region support for frameless app window on GTK.

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

Index: chrome/browser/ui/gtk/extensions/shell_window_gtk.h
diff --git a/chrome/browser/ui/gtk/extensions/shell_window_gtk.h b/chrome/browser/ui/gtk/extensions/shell_window_gtk.h
index 432edd14c938c239c743303f5c6d4a58cc75c23d..86f698dfc15127d855db02453aaebe64d9055def 100644
--- a/chrome/browser/ui/gtk/extensions/shell_window_gtk.h
+++ b/chrome/browser/ui/gtk/extensions/shell_window_gtk.h
@@ -12,11 +12,13 @@
 #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,
@@ -55,6 +57,8 @@ class ShellWindowGtk : public ShellWindow,
   // 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();
 
@@ -64,6 +68,8 @@ class ShellWindowGtk : public ShellWindow,
                        GdkEventConfigure*);
   CHROMEGTK_CALLBACK_1(ShellWindowGtk, gboolean, OnWindowState,
                        GdkEventWindowState*);
+  CHROMEGTK_CALLBACK_1(ShellWindowGtk, gboolean, OnButtonPress,
+                       GdkEventButton*);
 
   GtkWindow* window_;
   GdkWindowState state_;
@@ -83,6 +89,13 @@ class ShellWindowGtk : public ShellWindow,
   // 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);
 };