Initial views touchui Gesture Recognizer support

ui/views/widget/root_view.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_VIEWS_WIDGET_ROOT_VIEW_H_
 #define UI_VIEWS_WIDGET_ROOT_VIEW_H_
 #pragma once
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "ui/views/focus/focus_manager.h"
 #include "ui/views/focus/focus_search.h"
 #include "ui/views/view.h"
 
 namespace ui {
 enum TouchStatus;
 }
 
 namespace views {
 
 class Widget;
 class GestureManager;
+class GestureRecognizer;
 
 // This is a views-internal API and should not be used externally.
 // Widget exposes this object as a View*.
 namespace internal {
 
 ////////////////////////////////////////////////////////////////////////////////
 // RootView class
 //
 //  The RootView is the root of a View hierarchy. A RootView is attached to a
 //  Widget. The Widget is responsible for receiving events from the host
@@ skipping 30 matching lines @@
 
   // Input ---------------------------------------------------------------------
 
   // Process a key event. Send the event to the focused view and up the focus
   // path, and finally to the default keyboard handler, until someone consumes
   // it. Returns whether anyone consumed the event.
   bool OnKeyEvent(const KeyEvent& event);
 
   // Provided only for testing:
   void SetGestureManagerForTesting(GestureManager* g) { gesture_manager_ = g; }
+  void SetGestureRecognizerForTesting(GestureRecognizer* gr) {
+    gesture_recognizer_ = gr;
+  }
 
   // Focus ---------------------------------------------------------------------
 
   // Used to set the FocusTraversable parent after the view has been created
   // (typically when the hierarchy changes and this RootView is added/removed).
   virtual void SetFocusTraversableParent(FocusTraversable* focus_traversable);
 
   // Used to set the View parent after the view has been created.
   virtual void SetFocusTraversableParentView(View* view);
 
@@ skipping 19 matching lines @@
   virtual std::string GetClassName() const OVERRIDE;
   virtual void SchedulePaintInRect(const gfx::Rect& rect) OVERRIDE;
   virtual bool OnMousePressed(const MouseEvent& event) OVERRIDE;
   virtual bool OnMouseDragged(const MouseEvent& event) OVERRIDE;
   virtual void OnMouseReleased(const MouseEvent& event) OVERRIDE;
   virtual void OnMouseCaptureLost() OVERRIDE;
   virtual void OnMouseMoved(const MouseEvent& event) OVERRIDE;
   virtual void OnMouseExited(const MouseEvent& event) OVERRIDE;
   virtual bool OnMouseWheel(const MouseWheelEvent& event) OVERRIDE;
   virtual ui::TouchStatus OnTouchEvent(const TouchEvent& event) OVERRIDE;
+  virtual ui::GestureStatus OnGestureEvent(const GestureEvent& event) OVERRIDE;
   virtual void SetMouseHandler(View* new_mouse_handler) OVERRIDE;
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
   virtual void ReorderChildLayers(ui::Layer* parent_layer) OVERRIDE;
 
  protected:
   // Overridden from View:
   virtual void ViewHierarchyChanged(bool is_add, View* parent,
                                     View* child) OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual void CalculateOffsetToAncestorWithLayer(
@@ skipping 15 matching lines @@
   // cursor during drag operations. The location of the mouse should be in the
   // current coordinate system (i.e. any necessary transformation should be
   // applied to the point prior to calling this).
   void UpdateCursor(const MouseEvent& event);
 
   // Updates the last_mouse_* fields from e. The location of the mouse should be
   // in the current coordinate system (i.e. any necessary transformation should
   // be applied to the point prior to calling this).
   void SetMouseLocationAndFlags(const MouseEvent& event);
 
+  // Feeds touch event to GestureRecognizer.
+  // Returns true if the event resulted in firing a synthetic event.
+  bool DoGestureProcessing(const TouchEvent& event, ui::TouchStatus status);
+
   //////////////////////////////////////////////////////////////////////////////
 
   // Tree operations -----------------------------------------------------------
 
   // The host Widget
   Widget* widget_;
 
   // Input ---------------------------------------------------------------------
 
   // The view currently handing down - drag - up
@@ skipping 14 matching lines @@
   int last_mouse_event_flags_;
   int last_mouse_event_x_;
   int last_mouse_event_y_;
 
   // The gesture_manager_ for this.
   GestureManager* gesture_manager_;
 
   // The view currently handling touch events.
   View* touch_pressed_handler_;
 
+  // The gesture_recognizer_ for this.
+  GestureRecognizer* gesture_recognizer_;
+
+  // The view currently handling gesture events.
+  View* gesture_handling_view_;
+
   // Focus ---------------------------------------------------------------------
 
   // The focus search algorithm.
   FocusSearch focus_search_;
 
   // Whether this root view belongs to the current active window.
   // bool activated_;
 
   // The parent FocusTraversable, used for focus traversal.
   FocusTraversable* focus_traversable_parent_;
 
   // The View that contains this RootView. This is used when we have RootView
   // wrapped inside native components, and is used for the focus traversal.
   View* focus_traversable_parent_view_;
 
   // Drag and drop -------------------------------------------------------------
 
   // Tracks drag state for a view.
   View::DragInfo drag_info_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(RootView);
 };
 
 }  // namespace internal
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_ROOT_VIEW_H_