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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 #include "views/native_theme_painter.h" | |
6 | |
7 #include "base/logging.h" | |
8 #include "ui/base/animation/animation.h" | |
9 #include "ui/gfx/canvas.h" | |
10 #include "ui/gfx/canvas_skia.h" | |
11 #include "ui/gfx/rect.h" | |
12 #include "views/native_theme_delegate.h" | |
13 | |
14 namespace views { | |
15 | |
16 NativeThemePainter::NativeThemePainter(NativeThemeDelegate* delegate) | |
17 : delegate_(delegate) { | |
18 DCHECK(delegate_); | |
19 } | |
20 | |
21 gfx::Size NativeThemePainter::GetPreferredSize() { | |
22 const gfx::NativeTheme* theme = gfx::NativeTheme::instance(); | |
23 gfx::NativeTheme::ExtraParams extra; | |
24 gfx::NativeTheme::State state = delegate_->GetThemeState(&extra); | |
25 return theme->GetPartSize(delegate_->GetThemePart(), state, extra); | |
26 } | |
27 | |
28 void NativeThemePainter::Paint(int w, int h, gfx::Canvas* canvas) { | |
29 const gfx::NativeTheme* native_theme = gfx::NativeTheme::instance(); | |
30 gfx::NativeTheme::Part part = delegate_->GetThemePart(); | |
31 gfx::Rect rect(0, 0, w, h); | |
32 | |
33 if (delegate_->GetThemeAnimation() != NULL && | |
34 delegate_->GetThemeAnimation()->is_animating()) { | |
35 // Paint background state. | |
36 gfx::NativeTheme::ExtraParams prev_extra; | |
37 gfx::NativeTheme::State prev_state = | |
38 delegate_->GetBackgroundThemeState(&prev_extra); | |
39 native_theme->Paint( | |
40 canvas->GetSkCanvas(), part, prev_state, rect, prev_extra); | |
41 | |
42 // Composite foreground state above it. | |
43 gfx::NativeTheme::ExtraParams extra; | |
44 gfx::NativeTheme::State state = delegate_->GetForegroundThemeState(&extra); | |
45 int alpha = delegate_->GetThemeAnimation()->CurrentValueBetween(0, 255); | |
46 canvas->SaveLayerAlpha(static_cast<uint8>(alpha)); | |
47 native_theme->Paint(canvas->GetSkCanvas(), part, state, rect, extra); | |
48 canvas->Restore(); | |
49 } else { | |
50 gfx::NativeTheme::ExtraParams extra; | |
51 gfx::NativeTheme::State state = delegate_->GetThemeState(&extra); | |
52 native_theme->Paint(canvas->GetSkCanvas(), part, state, rect, extra); | |
53 } | |
54 } | |
55 | |
56 } // namespace views | |
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