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- // Copyright 2016 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_HUD_RENDERER_H_
- #define ASH_TOUCH_TOUCH_HUD_RENDERER_H_
- #include <map>
- #include "ash/ash_export.h"
- #include "ui/views/widget/widget_observer.h"
- namespace ui {
- class TouchEvent;
- }
- namespace views {
- class Widget;
- }
- namespace ash {
- class TouchPointView;
- // Handles touch events to draw out touch points for TouchHudProjection
- // (--show-taps).
- class ASH_EXPORT TouchHudRenderer : public views::WidgetObserver {
- public:
- explicit TouchHudRenderer(views::Widget* parent_widget);
- TouchHudRenderer(const TouchHudRenderer&) = delete;
- TouchHudRenderer& operator=(const TouchHudRenderer&) = delete;
- ~TouchHudRenderer() override;
- // Called to clear touch points and traces from the screen.
- void Clear();
- // Receives a touch event and draws its touch point.
- void HandleTouchEvent(const ui::TouchEvent& event);
- // views::WidgetObserver:
- void OnWidgetDestroying(views::Widget* widget) override;
- private:
- friend class TouchHudProjectionTest;
- // The parent widget that all touch points would be drawn in.
- views::Widget* parent_widget_;
- // A map of touch ids to TouchPointView.
- std::map<int, TouchPointView*> points_;
- };
- } // namespace ash
- #endif // ASH_TOUCH_TOUCH_HUD_RENDERER_H_
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