| // Copyright 2018 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 CHROMECAST_GRAPHICS_CAST_TOUCH_EVENT_GATE_H_ |
| #define CHROMECAST_GRAPHICS_CAST_TOUCH_EVENT_GATE_H_ |
| |
| #include "base/containers/flat_set.h" |
| #include "ui/events/event_rewriter.h" |
| |
| namespace aura { |
| class Window; |
| } // namespace aura |
| |
| namespace chromecast { |
| |
| class CastTouchActivityObserver; |
| |
| // An event rewriter whose purpose is to discard events (when enabled). This |
| // class is meant to be installed as the first rewriter in the chain, to handle |
| // scenarios where all input needs to be disabled, such as when the device |
| // screen is turned off. Instances of CastTouchActivityObserver can be |
| // registered to receive notifications of gated events. |
| class CastTouchEventGate : public ui::EventRewriter { |
| public: |
| explicit CastTouchEventGate(aura::Window* root_window); |
| ~CastTouchEventGate() override; |
| |
| void SetEnabled(bool enabled); |
| |
| void AddObserver(CastTouchActivityObserver* observer); |
| void RemoveObserver(CastTouchActivityObserver* observer); |
| |
| // ui::EventRewriter implementation. |
| ui::EventRewriteStatus RewriteEvent( |
| const ui::Event& event, |
| std::unique_ptr<ui::Event>* rewritten_event) override; |
| |
| ui::EventRewriteStatus NextDispatchEvent( |
| const ui::Event& last_event, |
| std::unique_ptr<ui::Event>* new_event) override; |
| |
| private: |
| bool enabled_ = false; |
| aura::Window* root_window_; |
| base::flat_set<CastTouchActivityObserver*> observers_; |
| }; |
| |
| } // namespace chromecast |
| |
| #endif // CHROMECAST_GRAPHICS_CAST_TOUCH_EVENT_GATE_H_ |