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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_SYSTEM_GESTURE_EVENT_FILTER_H_
#define ASH_WM_SYSTEM_GESTURE_EVENT_FILTER_H_
#include "ash/shell.h"
#include "ash/touch/touch_uma.h"
#include "base/timer/timer.h"
#include "ui/aura/window_observer.h"
#include "ui/events/event_handler.h"
#include "ui/gfx/point.h"
#include <map>
namespace aura {
class Window;
}
namespace ui {
class LocatedEvent;
}
namespace ash {
namespace test {
class SystemGestureEventFilterTest;
}
namespace internal {
class LongPressAffordanceHandler;
class OverviewGestureHandler;
class SystemPinchHandler;
class TouchUMA;
class TwoFingerDragHandler;
// An event filter which handles system level gesture events.
class SystemGestureEventFilter : public ui::EventHandler,
public aura::WindowObserver {
public:
SystemGestureEventFilter();
virtual ~SystemGestureEventFilter();
// Overridden from ui::EventHandler:
virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
virtual void OnScrollEvent(ui::ScrollEvent* event) OVERRIDE;
virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
// Overridden from aura::WindowObserver.
virtual void OnWindowVisibilityChanged(aura::Window* window,
bool visible) OVERRIDE;
virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
private:
friend class ash::test::SystemGestureEventFilterTest;
// Removes system-gesture handlers for a window.
void ClearGestureHandlerForWindow(aura::Window* window);
typedef std::map<aura::Window*, SystemPinchHandler*> WindowPinchHandlerMap;
// Created on demand when a system-level pinch gesture is initiated. Destroyed
// when the system-level pinch gesture ends for the window.
WindowPinchHandlerMap pinch_handlers_;
bool system_gestures_enabled_;
scoped_ptr<LongPressAffordanceHandler> long_press_affordance_;
scoped_ptr<OverviewGestureHandler> overview_gesture_handler_;
scoped_ptr<TwoFingerDragHandler> two_finger_drag_;
DISALLOW_COPY_AND_ASSIGN(SystemGestureEventFilter);
};
} // namespace internal
} // namespace ash
#endif // ASH_WM_SYSTEM_GESTURE_EVENT_FILTER_H_
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