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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef VIEWS_REPEAT_CONTROLLER_H_ | |
| 6 #define VIEWS_REPEAT_CONTROLLER_H_ | |
| 7 #pragma once | |
| 8 | |
| 9 #include "base/callback.h" | |
| 10 #include "base/timer.h" | |
| 11 | |
| 12 namespace views { | |
| 13 | |
| 14 /////////////////////////////////////////////////////////////////////////////// | |
| 15 // | |
| 16 // RepeatController | |
| 17 // | |
| 18 // An object that handles auto-repeating UI actions. There is a longer initial | |
| 19 // delay after which point repeats become constant. Users provide a callback | |
| 20 // that is notified when each repeat occurs so that they can perform the | |
| 21 // associated action. | |
| 22 // | |
| 23 /////////////////////////////////////////////////////////////////////////////// | |
| 24 class RepeatController { | |
| 25 public: | |
| 26 // The RepeatController takes ownership of this callback object. | |
| 27 explicit RepeatController(const base::Closure& callback); | |
| 28 virtual ~RepeatController(); | |
| 29 | |
| 30 // Start repeating. | |
| 31 void Start(); | |
| 32 | |
| 33 // Stop repeating. | |
| 34 void Stop(); | |
| 35 | |
| 36 private: | |
| 37 // Called when the timer expires. | |
| 38 void Run(); | |
| 39 | |
| 40 // The current timer. | |
| 41 base::OneShotTimer<RepeatController> timer_; | |
| 42 | |
| 43 base::Closure callback_; | |
| 44 | |
| 45 DISALLOW_COPY_AND_ASSIGN(RepeatController); | |
| 46 }; | |
| 47 | |
| 48 } // namespace views | |
| 49 | |
| 50 #endif // #ifndef VIEWS_REPEAT_CONTROLLER_H_ | |
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