Extend MotionEvent to have tool type and button state

ui/events/gesture_detection/motion_event.h

 // Copyright 2014 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_EVENTS_GESTURE_DETECTION_MOTION_EVENT_H_
 #define UI_EVENTS_GESTURE_DETECTION_MOTION_EVENT_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "ui/events/gesture_detection/gesture_detection_export.h"
 
 namespace ui {
 
 // Abstract class for a generic motion-related event, patterned after that
 // subset of Android's MotionEvent API used in gesture detection.
 class GESTURE_DETECTION_EXPORT MotionEvent {
  public:
   enum Action {
     ACTION_DOWN,
     ACTION_UP,
     ACTION_MOVE,
     ACTION_CANCEL,
     ACTION_POINTER_DOWN,
     ACTION_POINTER_UP,
   };
 
+  enum ToolType {
+    TOOL_TYPE_UNKNOWN,
+    TOOL_TYPE_FINGER,
+    TOOL_TYPE_STYLUS,
+    TOOL_TYPE_MOUSE,
+  };
+
+  enum ButtonType {
+    BUTTON_PRIMARY = 1 << 0,
+    BUTTON_SECONDARY = 1 << 1,
+    BUTTON_TERTIARY = 1 << 2,
+    BUTTON_BACK = 1 << 3,
+    BUTTON_FORWARD = 1 << 4,
+  };
+
   // The implementer promises that |GetPointerId()| will never exceed this.
   enum { MAX_POINTER_ID = 31 };
 
   virtual ~MotionEvent() {}
 
   virtual int GetId() const = 0;
   virtual Action GetAction() const = 0;
   // Only valid if |GetAction()| returns ACTION_POINTER_UP or
   // ACTION_POINTER_DOWN.
   virtual int GetActionIndex() const = 0;
   virtual size_t GetPointerCount() const = 0;
   virtual int GetPointerId(size_t pointer_index) const = 0;
   virtual float GetX(size_t pointer_index) const = 0;
   virtual float GetY(size_t pointer_index) const = 0;
   virtual float GetRawX(size_t pointer_index) const = 0;
   virtual float GetRawY(size_t pointer_index) const = 0;
   virtual float GetTouchMajor(size_t pointer_index) const = 0;
   virtual float GetPressure(size_t pointer_index) const = 0;
   virtual base::TimeTicks GetEventTime() const = 0;
 
   virtual size_t GetHistorySize() const = 0;
   virtual base::TimeTicks GetHistoricalEventTime(
       size_t historical_index) const = 0;
   virtual float GetHistoricalTouchMajor(size_t pointer_index,
                                         size_t historical_index) const = 0;
   virtual float GetHistoricalX(size_t pointer_index,
                                size_t historical_index) const = 0;
   virtual float GetHistoricalY(size_t pointer_index,
                                size_t historical_index) const = 0;
+  virtual ToolType GetToolType(size_t pointer_index) const = 0;
+  virtual int GetButtonState() const = 0;
 
   virtual scoped_ptr<MotionEvent> Clone() const = 0;
   virtual scoped_ptr<MotionEvent> Cancel() const = 0;
 
   // Utility accessor methods for convenience.
   float GetX() const { return GetX(0); }
   float GetY() const { return GetY(0); }
   float GetRawX() const { return GetRawX(0); }
   float GetRawY() const { return GetRawY(0); }
   float GetRawOffsetX() const { return GetRawX() - GetX(); }
   float GetRawOffsetY() const { return GetRawY() - GetY(); }
   float GetTouchMajor() const { return GetTouchMajor(0); }
   float GetPressure() const { return GetPressure(0); }
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_GESTURE_DETECTION_MOTION_EVENT_H_