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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 UI_GFX_MAC_SCOPED_NS_DISABLE_SCREEN_UPDATES_H_ | |
| 6 #define UI_GFX_MAC_SCOPED_NS_DISABLE_SCREEN_UPDATES_H_ | |
| 7 | |
| 8 #import <Cocoa/Cocoa.h> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 | |
| 12 namespace gfx { | |
| 13 | |
| 14 // A stack-based class to disable Cocoa screen updates. When instantiated, it | |
| 15 // disables screen updates and enables them when destroyed. Update disabling | |
| 16 // can be nested, and there is a time-maximum (about 1 second) after which | |
| 17 // Cocoa will automatically re-enable updating. This class doesn't attempt to | |
| 18 // overrule that. | |
| 19 class ScopedNSDisableScreenUpdates { | |
| 20 public: | |
| 21 ScopedNSDisableScreenUpdates() { | |
| 22 NSDisableScreenUpdates(); | |
| 23 } | |
| 24 ~ScopedNSDisableScreenUpdates() { | |
| 25 NSEnableScreenUpdates(); | |
| 26 } | |
| 27 | |
| 28 private: | |
| 29 DISALLOW_COPY_AND_ASSIGN(ScopedNSDisableScreenUpdates); | |
| 30 }; | |
| 31 | |
| 32 } // namespace gfx | |
| 33 | |
| 34 #endif // UI_GFX_MAC_SCOPED_NS_DISABLE_SCREEN_UPDATES_H_ | |
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