| // 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 ASH_SYSTEM_TRAY_TIME_TO_CLICK_RECORDER_H_ |
| #define ASH_SYSTEM_TRAY_TIME_TO_CLICK_RECORDER_H_ |
| |
| #include "ui/events/event_handler.h" |
| |
| namespace views { |
| class View; |
| } // namespace views |
| |
| namespace ash { |
| |
| // An event handler that will be installed as PreTargetHandler of |target_view| |
| // to record TimeToClick metrics. |
| class TimeToClickRecorder : public ui::EventHandler { |
| public: |
| class Delegate { |
| public: |
| virtual ~Delegate() {} |
| |
| // Record TimeToClick metrics. Called by TimeToClickRecorder which is a |
| // PreTargetHandler of |target_view|. |
| virtual void RecordTimeToClick() = 0; |
| }; |
| |
| TimeToClickRecorder(Delegate* delegate, views::View* target_view); |
| ~TimeToClickRecorder() override = default; |
| |
| private: |
| // ui::EventHandler: |
| void OnEvent(ui::Event* event) override; |
| |
| Delegate* const delegate_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TimeToClickRecorder); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_SYSTEM_TRAY_TIME_TO_CLICK_RECORDER_H_ |