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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_PAINT_LOCK_H_ | |
| 6 #define VIEWS_PAINT_LOCK_H_ | |
| 7 #pragma once | |
| 8 | |
| 9 #include "base/basictypes.h" | |
| 10 #include "views/views_export.h" | |
| 11 | |
| 12 namespace views { | |
| 13 | |
| 14 class View; | |
| 15 | |
| 16 // Instances of PaintLock can be created to disable painting of the view | |
| 17 // (compositing is not disabled). When the class is destroyed, painting is | |
| 18 // re-enabled. This can be useful during operations like animations, that are | |
| 19 // sensitive to costly paints, and during which only composting, not painting, | |
| 20 // is required. | |
| 21 class VIEWS_EXPORT PaintLock { | |
| 22 public: | |
| 23 // The paint lock does not own the view. It is an error for the view to be | |
| 24 // destroyed before the lock. | |
| 25 PaintLock(View* view); | |
| 26 ~PaintLock(); | |
| 27 | |
| 28 private: | |
| 29 View* view_; | |
| 30 | |
| 31 DISALLOW_COPY_AND_ASSIGN(PaintLock); | |
| 32 }; | |
| 33 | |
| 34 } // namespace views | |
| 35 | |
| 36 #endif // VIEWS_PAINT_LOCK_H_ | |
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