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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_NATIVE_THEME_DELEGATE_H_ | |
6 #define VIEWS_NATIVE_THEME_DELEGATE_H_ | |
7 #pragma once | |
8 | |
9 #include "ui/gfx/native_theme.h" | |
10 #include "ui/gfx/rect.h" | |
11 #include "views/views_export.h" | |
12 | |
13 namespace views { | |
14 | |
15 // A delagate that supports animating transtions between different native | |
16 // theme states. This delegate can be used to control a native theme Border | |
17 // or Painter object. | |
18 // | |
19 // If animation is onging, the native theme border or painter will | |
20 // composite the foreground state over the backgroud state using an alpha | |
21 // between 0 and 255 based on the current value of the animation. | |
22 class VIEWS_EXPORT NativeThemeDelegate { | |
23 public: | |
24 virtual ~NativeThemeDelegate() {} | |
25 | |
26 // Get the native theme part that should be drawn. | |
27 virtual gfx::NativeTheme::Part GetThemePart() const = 0; | |
28 | |
29 // Get the rectangle that should be painted. | |
30 virtual gfx::Rect GetThemePaintRect() const = 0; | |
31 | |
32 // Get the state of the part, along with any extra data needed for drawing. | |
33 virtual gfx::NativeTheme::State GetThemeState( | |
34 gfx::NativeTheme::ExtraParams* params) const = 0; | |
35 | |
36 // If the native theme drawign should be animated, return the Animation object | |
37 // that controlls it. If no animation is ongoing, NULL may be returned. | |
38 virtual const ui::Animation* GetThemeAnimation() const = 0; | |
39 | |
40 // If animation is onging, this returns the background native theme state. | |
41 virtual gfx::NativeTheme::State GetBackgroundThemeState( | |
42 gfx::NativeTheme::ExtraParams* params) const = 0; | |
43 | |
44 // If animation is onging, this returns the foreground native theme state. | |
45 // This state will be composited over the background using an alpha value | |
46 // based on the current value of the animation. | |
47 virtual gfx::NativeTheme::State GetForegroundThemeState( | |
48 gfx::NativeTheme::ExtraParams* params) const = 0; | |
49 }; | |
50 | |
51 } // namespace views | |
52 | |
53 #endif // VIEWS_NATIVE_THEME_DELEGATE_H_ | |
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