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// Copyright 2013 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 CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_
#define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_
#include "content/browser/renderer_host/input/synthetic_gesture.h"
#include "content/browser/renderer_host/input/synthetic_gesture_target.h"
#include "content/common/content_export.h"
#include "content/common/input/synthetic_pinch_gesture_params.h"
#include "content/common/input/synthetic_web_input_event_builders.h"
#include "third_party/WebKit/public/web/WebInputEvent.h"
namespace content {
class CONTENT_EXPORT SyntheticPinchGesture : public SyntheticGesture {
public:
explicit SyntheticPinchGesture(const SyntheticPinchGestureParams& params);
virtual ~SyntheticPinchGesture();
virtual SyntheticGesture::Result ForwardInputEvents(
const base::TimeDelta& interval, SyntheticGestureTarget* target) OVERRIDE;
private:
enum GestureState {
SETUP,
STARTED,
MOVING,
DONE
};
void ForwardTouchInputEvents(
const base::TimeDelta& interval, SyntheticGestureTarget* target);
void UpdateTouchPoints(base::TimeDelta interval);
void PressTouchPoints(SyntheticGestureTarget* target);
void MoveTouchPoints(SyntheticGestureTarget* target);
void ReleaseTouchPoints(SyntheticGestureTarget* target);
void ForwardTouchEvent(SyntheticGestureTarget* target) const;
void SetupCoordinates(SyntheticGestureTarget* target);
float GetDeltaForPointer0(const base::TimeDelta& interval) const;
float ComputeAbsoluteRemainingDistance() const;
bool HasReachedTarget() const;
SyntheticPinchGestureParams params_;
float current_y_0_;
float current_y_1_;
float target_y_0_;
float target_y_1_;
SyntheticGestureParams::GestureSourceType gesture_source_type_;
GestureState state_;
SyntheticWebTouchEvent touch_event_;
DISALLOW_COPY_AND_ASSIGN(SyntheticPinchGesture);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PINCH_GESTURE_H_
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