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// 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 ASH_WM_GESTURES_TWO_FINGER_DRAG_HANDLER_H_
#define ASH_WM_GESTURES_TWO_FINGER_DRAG_HANDLER_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "ui/aura/window_observer.h"
namespace aura {
class Window;
}
namespace ui {
class GestureEvent;
}
namespace ash {
class WindowResizer;
namespace internal {
// This handles 2-finger drag gestures to move toplevel windows.
class TwoFingerDragHandler : public aura::WindowObserver {
public:
TwoFingerDragHandler();
virtual ~TwoFingerDragHandler();
// Processes a gesture event and starts a drag, or updates/ends an in-progress
// drag. Returns true if the event has been handled and should not be
// processed any farther, false otherwise.
bool ProcessGestureEvent(aura::Window* target, const ui::GestureEvent& event);
private:
void Reset();
// Overridden from aura::WindowObserver.
virtual void OnWindowVisibilityChanged(aura::Window* window,
bool visible) OVERRIDE;
virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
int first_finger_hittest_;
scoped_ptr<WindowResizer> window_resizer_;
DISALLOW_COPY_AND_ASSIGN(TwoFingerDragHandler);
};
}
} // namespace ash
#endif // ASH_WM_GESTURES_TWO_FINGER_DRAG_HANDLER_H_
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