aura: Gesture event plumbing (skeleton).

ui/aura/root_window.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 UI_AURA_ROOT_WINDOW_H_
 #define UI_AURA_ROOT_WINDOW_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
@@ skipping 21 matching lines @@
 namespace aura {
 
 class RootWindowHost;
 class RootWindowObserver;
 class KeyEvent;
 class MouseEvent;
 class ScreenAura;
 class StackingClient;
 class ScrollEvent;
 class TouchEvent;
+class GestureEvent;
 
 // RootWindow is responsible for hosting a set of windows.
 class AURA_EXPORT RootWindow : public ui::CompositorDelegate,
                                public Window,
                                public internal::FocusManager,
                                public ui::LayerAnimationObserver {
  public:
   static RootWindow* GetInstance();
   static void DeleteInstance();
 
@@ skipping 35 matching lines @@
 
   // Handles a key event. Returns true if handled.
   bool DispatchKeyEvent(KeyEvent* event);
 
   // Handles a scroll event. Returns true if handled.
   bool DispatchScrollEvent(ScrollEvent* event);
 
   // Handles a touch event. Returns true if handled.
   bool DispatchTouchEvent(TouchEvent* event);
 
+  // Handles a gesture event. Returns true if handled. Unlike the other
+  // event-dispatching function (e.g. for touch/mouse/keyboard events), gesture
+  // events are dispatched from GestureRecognizer instead of RootWindowHost.
+  bool DispatchGestureEvent(GestureEvent* event);
+
   // Called when the host changes size.
   void OnHostResized(const gfx::Size& size);
 
   // Called when the native screen's resolution changes.
   void OnNativeScreenResized(const gfx::Size& size);
 
   // Invoked when |window| is initialized.
   void WindowInitialized(Window* window);
 
   // Invoked when |window| is being destroyed.
@@ skipping 42 matching lines @@
   RootWindow();
   virtual ~RootWindow();
 
   // Called whenever the mouse moves, tracks the current |mouse_moved_handler_|,
   // sending exited and entered events as its value changes.
   void HandleMouseMoved(const MouseEvent& event, Window* target);
 
   bool ProcessMouseEvent(Window* target, MouseEvent* event);
   bool ProcessKeyEvent(Window* target, KeyEvent* event);
   ui::TouchStatus ProcessTouchEvent(Window* target, TouchEvent* event);
+  ui::GestureStatus ProcessGestureEvent(Window* target, GestureEvent* event);
 
   // Overridden from Window:
   virtual bool CanFocus() const OVERRIDE;
   virtual bool CanReceiveEvents() const OVERRIDE;
   virtual internal::FocusManager* GetFocusManager() OVERRIDE;
   virtual RootWindow* GetRootWindow() OVERRIDE;
   virtual void WindowDetachedFromRootWindow(Window* window) OVERRIDE;
 
   // Overridden from ui::LayerAnimationObserver:
   virtual void OnLayerAnimationEnded(
@@ skipping 50 matching lines @@
   Window* mouse_moved_handler_;
   Window* focused_window_;
   Window* touch_event_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindow);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_H_