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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_TOUCH_TOUCH_OBSERVER_HUD_H_
#define ASH_TOUCH_TOUCH_OBSERVER_HUD_H_
#pragma once
#include "ash/shell.h"
#include "ui/aura/event_filter.h"
#include "ui/gfx/point.h"
#include "ui/views/widget/widget.h"
namespace aura {
class MouseEvent;
class KeyEvent;
class Window;
}
namespace views {
class Label;
class Widget;
}
namespace ash {
namespace internal {
class TouchHudCanvas;
// An event filter which handles system level gesture events.
class TouchObserverHUD : public aura::EventFilter,
public views::Widget::Observer {
public:
TouchObserverHUD();
virtual ~TouchObserverHUD();
private:
void UpdateTouchPointLabel(int index);
// Overriden from aura::EventFilter:
virtual bool PreHandleKeyEvent(aura::Window* target,
aura::KeyEvent* event) OVERRIDE;
virtual bool PreHandleMouseEvent(aura::Window* target,
aura::MouseEvent* event) OVERRIDE;
virtual ui::TouchStatus PreHandleTouchEvent(aura::Window* target,
aura::TouchEvent* event) OVERRIDE;
virtual ui::GestureStatus PreHandleGestureEvent(
aura::Window* target,
aura::GestureEvent* event) OVERRIDE;
// Overridden from views::Widget::Observer.
virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE;
static const int kMaxTouchPoints = 32;
views::Widget* widget_;
TouchHudCanvas* canvas_;
views::Label* touch_labels_[kMaxTouchPoints];
gfx::Point touch_positions_[kMaxTouchPoints];
ui::EventType touch_status_[kMaxTouchPoints];
DISALLOW_COPY_AND_ASSIGN(TouchObserverHUD);
};
} // namespace internal
} // namespace ash
#endif // ASH_TOUCH_TOUCH_OBSERVER_HUD_H_
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