content/browser/renderer_host/input/synthetic_pinch_gesture.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_
   7
   8 #include "content/browser/renderer_host/input/synthetic_gesture.h"
   9 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
  10 #include "content/common/content_export.h"
  11 #include "content/common/input/synthetic_pinch_gesture_params.h"
  12 #include "content/common/input/synthetic_web_input_event_builders.h"
  13 #include "third_party/WebKit/public/web/WebInputEvent.h"
  14
  15 namespace content {
  16
  17 class CONTENT_EXPORT SyntheticPinchGesture : public SyntheticGesture {
  18  public:
  19   explicit SyntheticPinchGesture(const SyntheticPinchGestureParams& params);
  20   virtual ~SyntheticPinchGesture();
  21
  22   virtual SyntheticGesture::Result ForwardInputEvents(
  23       const base::TimeDelta& interval, SyntheticGestureTarget* target) OVERRIDE;
  24
  25  private:
  26   enum GestureState {
  27     SETUP,
  28     STARTED,
  29     MOVING,
  30     DONE
  31   };
  32
  33   void ForwardTouchInputEvents(
  34       const base::TimeDelta& interval, SyntheticGestureTarget* target);
  35
  36   void UpdateTouchPoints(base::TimeDelta interval);
  37   void PressTouchPoints(SyntheticGestureTarget* target);
  38   void MoveTouchPoints(SyntheticGestureTarget* target);
  39   void ReleaseTouchPoints(SyntheticGestureTarget* target);
  40   void ForwardTouchEvent(SyntheticGestureTarget* target) const;
  41
  42   void SetupCoordinates(SyntheticGestureTarget* target);
  43   float GetDeltaForPointer0(const base::TimeDelta& interval) const;
  44   float ComputeAbsoluteRemainingDistance() const;
  45   bool HasReachedTarget() const;
  46
  47   SyntheticPinchGestureParams params_;
  48   float current_y_0_;
  49   float current_y_1_;
  50   float target_y_0_;
  51   float target_y_1_;
  52   SyntheticGestureParams::GestureSourceType gesture_source_type_;
  53   GestureState state_;
  54   SyntheticWebTouchEvent touch_event_;
  55
  56   DISALLOW_COPY_AND_ASSIGN(SyntheticPinchGesture);
  57 };
  58
  59 }  // namespace content
  60
  61 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_