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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef UI_APP_LIST_VIEWS_CACHED_LABEL_H_ | 5 #ifndef UI_APP_LIST_VIEWS_CACHED_LABEL_H_ |
6 #define UI_APP_LIST_VIEWS_CACHED_LABEL_H_ | 6 #define UI_APP_LIST_VIEWS_CACHED_LABEL_H_ |
7 | 7 |
8 #include "build/build_config.h" | 8 #include "build/build_config.h" |
9 #include "ui/gfx/image/image_skia.h" | 9 #include "ui/gfx/image/image_skia.h" |
10 #include "ui/views/controls/label.h" | 10 #include "ui/views/controls/label.h" |
11 #include "ui/views/view.h" | 11 #include "ui/views/view.h" |
12 | 12 |
13 namespace gfx { | 13 namespace gfx { |
14 class Canvas; | 14 class Canvas; |
15 } | 15 } |
16 | 16 |
17 namespace app_list { | 17 namespace app_list { |
18 | 18 |
19 // Subclass of views::Label that caches the rendered text in an ImageSkia. | 19 // Subclass of views::Label that caches the rendered text in an ImageSkia. |
20 class CachedLabel : public views::Label { | 20 class CachedLabel : public views::Label { |
21 public: | 21 public: |
22 CachedLabel(); | 22 CachedLabel(); |
23 | 23 |
24 // Have the next call to OnPaint() update the backing image. | 24 // Have the next call to OnPaint() update the backing image. |
25 void Invalidate() { needs_repaint_ = true; } | 25 void Invalidate() { needs_repaint_ = true; } |
26 | 26 |
27 // Calls the base label's OnPaint() to paint into a backing image. | 27 // Calls the base label's OnPaint() to paint into a backing image. |
28 void PaintToBackingImage(); | 28 void PaintToBackingImage(); |
29 | 29 |
30 #if defined(OS_WIN) | |
31 // Overridden from views::View: | |
32 void OnPaint(gfx::Canvas* canvas) override; | |
33 #endif | |
34 | |
35 // Overridden from ui::LayerDelegate: | 30 // Overridden from ui::LayerDelegate: |
36 void OnDeviceScaleFactorChanged(float device_scale_factor) override; | 31 void OnDeviceScaleFactorChanged(float device_scale_factor) override; |
37 | 32 |
38 private: | 33 private: |
39 bool needs_repaint_; | 34 bool needs_repaint_; |
40 gfx::ImageSkia image_; | 35 gfx::ImageSkia image_; |
41 }; | 36 }; |
42 | 37 |
43 } // namespace app_list | 38 } // namespace app_list |
44 | 39 |
45 #endif // UI_APP_LIST_VIEWS_CACHED_LABEL_H_ | 40 #endif // UI_APP_LIST_VIEWS_CACHED_LABEL_H_ |
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