| // 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_ |
| |
| #include "ash/shell.h" |
| #include "ui/aura/event_filter.h" |
| #include "ui/gfx/point.h" |
| #include "ui/views/widget/widget_observer.h" |
| |
| namespace aura { |
| 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::WidgetObserver { |
| public: |
| TouchObserverHUD(); |
| virtual ~TouchObserverHUD(); |
| |
| private: |
| void UpdateTouchPointLabel(int index); |
| |
| // Overriden from aura::EventFilter: |
| virtual bool PreHandleKeyEvent(aura::Window* target, |
| ui::KeyEvent* event) OVERRIDE; |
| virtual bool PreHandleMouseEvent(aura::Window* target, |
| ui::MouseEvent* event) OVERRIDE; |
| virtual ui::TouchStatus PreHandleTouchEvent( |
| aura::Window* target, |
| ui::TouchEvent* event) OVERRIDE; |
| virtual ui::EventResult PreHandleGestureEvent( |
| aura::Window* target, |
| ui::GestureEvent* event) OVERRIDE; |
| |
| // Overridden from views::WidgetObserver: |
| 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_ |