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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 ASH_WM_GESTURES_OVERVIEW_GESTURE_HANDLER_H_
#define ASH_WM_GESTURES_OVERVIEW_GESTURE_HANDLER_H_
#include "base/basictypes.h"
namespace aura {
class Window;
}
namespace ui {
class GestureEvent;
class ScrollEvent;
}
namespace ash {
// This handles a 3-finger swipe down gesture from the top of the screen to
// enter overview mode.
class OverviewGestureHandler {
public:
OverviewGestureHandler();
virtual ~OverviewGestureHandler();
// Processes a scroll event and may start overview. Returns true if the event
// has been handled and should not be processed further, false otherwise.
bool ProcessScrollEvent(const ui::ScrollEvent& event);
// Processes a gesture event and may start overview. Returns true if the event
// has been handled and should not be processed any farther, false otherwise.
bool ProcessGestureEvent(const ui::GestureEvent& event);
private:
// True if the current/last gesture began in the top bezel.
bool in_top_bezel_gesture_;
// The total distance scrolled with three fingers.
float scroll_x_;
float scroll_y_;
DISALLOW_COPY_AND_ASSIGN(OverviewGestureHandler);
};
} // namespace ash
#endif // ASH_WM_GESTURES_OVERVIEW_GESTURE_HANDLER_H_
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