1 // Copyright (c) 2012 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 "ui/views/controls/button/label_button_border.h"
6
7 #include "base/logging.h"
8 #include "grit/ui_resources.h"
9 #include "third_party/skia/include/core/SkPaint.h"
10 #include "third_party/skia/include/effects/SkLerpXfermode.h"
11 #include "ui/base/resource/resource_bundle.h"
12 #include "ui/gfx/animation/animation.h"
13 #include "ui/gfx/canvas.h"
14 #include "ui/gfx/rect.h"
15 #include "ui/gfx/skia_util.h"
16 #include "ui/gfx/sys_color_change_listener.h"
17 #include "ui/native_theme/native_theme.h"
18 #include "ui/views/border.h"
19 #include "ui/views/controls/button/label_button.h"
20 #include "ui/views/native_theme_delegate.h"
21
22 namespace views {
23
24 namespace {
25
26 // Insets for the unified button images. This assumes that the images
27 // are of a 9 grid, of 5x5 size each.
28 const int kButtonInsets = 5;
29
30 // The text-button hot and pushed image IDs; normal is unadorned by default.
31 const int kTextHoveredImages[] = IMAGE_GRID(IDR_TEXTBUTTON_HOVER);
32 const int kTextPressedImages[] = IMAGE_GRID(IDR_TEXTBUTTON_PRESSED);
33
GetButtonState(ui::NativeTheme::State state)34 Button::ButtonState GetButtonState(ui::NativeTheme::State state) {
35 switch (state) {
36 case ui::NativeTheme::kDisabled: return Button::STATE_DISABLED;
37 case ui::NativeTheme::kHovered: return Button::STATE_HOVERED;
38 case ui::NativeTheme::kNormal: return Button::STATE_NORMAL;
39 case ui::NativeTheme::kPressed: return Button::STATE_PRESSED;
40 case ui::NativeTheme::kMaxState: NOTREACHED() << "Unknown state: " << state;
41 }
42 return Button::STATE_NORMAL;
43 }
44
45 // A helper function to paint the native theme or images as appropriate.
PaintHelper(LabelButtonBorder * border,gfx::Canvas * canvas,const ui::NativeTheme * theme,ui::NativeTheme::Part part,ui::NativeTheme::State state,const gfx::Rect & rect,const ui::NativeTheme::ExtraParams & extra)46 void PaintHelper(LabelButtonBorder* border,
47 gfx::Canvas* canvas,
48 const ui::NativeTheme* theme,
49 ui::NativeTheme::Part part,
50 ui::NativeTheme::State state,
51 const gfx::Rect& rect,
52 const ui::NativeTheme::ExtraParams& extra) {
53 if (border->style() == Button::STYLE_NATIVE_TEXTBUTTON) {
54 theme->Paint(canvas->sk_canvas(), part, state, rect, extra);
55 } else {
56 Painter* painter =
57 border->GetPainter(extra.button.is_focused, GetButtonState(state));
58 // Paint any corresponding unfocused painter if there is no focused painter.
59 if (!painter && extra.button.is_focused)
60 painter = border->GetPainter(false, GetButtonState(state));
61 if (painter)
62 Painter::PaintPainterAt(canvas, painter, rect);
63 }
64 }
65
66 } // namespace
67
LabelButtonBorder(Button::ButtonStyle style)68 LabelButtonBorder::LabelButtonBorder(Button::ButtonStyle style)
69 : style_(style) {
70 ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
71 const gfx::Insets insets(kButtonInsets,
72 kButtonInsets,
73 kButtonInsets,
74 kButtonInsets);
75
76 if (style == Button::STYLE_BUTTON) {
77 set_insets(gfx::Insets(8, 13, 8, 13));
78 SetPainter(false, Button::STATE_NORMAL,
79 Painter::CreateImagePainter(
80 *rb.GetImageSkiaNamed(IDR_BUTTON_NORMAL), insets));
81 SetPainter(false, Button::STATE_HOVERED,
82 Painter::CreateImagePainter(
83 *rb.GetImageSkiaNamed(IDR_BUTTON_HOVER), insets));
84 SetPainter(false, Button::STATE_PRESSED,
85 Painter::CreateImagePainter(
86 *rb.GetImageSkiaNamed(IDR_BUTTON_PRESSED), insets));
87 SetPainter(false, Button::STATE_DISABLED,
88 Painter::CreateImagePainter(
89 *rb.GetImageSkiaNamed(IDR_BUTTON_DISABLED), insets));
90 SetPainter(true, Button::STATE_NORMAL,
91 Painter::CreateImagePainter(
92 *rb.GetImageSkiaNamed(IDR_BUTTON_FOCUSED_NORMAL), insets));
93 SetPainter(true, Button::STATE_HOVERED,
94 Painter::CreateImagePainter(
95 *rb.GetImageSkiaNamed(IDR_BUTTON_FOCUSED_HOVER), insets));
96 SetPainter(true, Button::STATE_PRESSED,
97 Painter::CreateImagePainter(
98 *rb.GetImageSkiaNamed(IDR_BUTTON_FOCUSED_PRESSED), insets));
99 SetPainter(true, Button::STATE_DISABLED,
100 Painter::CreateImagePainter(
101 *rb.GetImageSkiaNamed(IDR_BUTTON_DISABLED), insets));
102 } else if (style == Button::STYLE_TEXTBUTTON) {
103 set_insets(gfx::Insets(5, 6, 5, 6));
104 SetPainter(false, Button::STATE_HOVERED,
105 Painter::CreateImageGridPainter(kTextHoveredImages));
106 SetPainter(false, Button::STATE_PRESSED,
107 Painter::CreateImageGridPainter(kTextPressedImages));
108 } else if (style == Button::STYLE_NATIVE_TEXTBUTTON) {
109 set_insets(gfx::Insets(5, 12, 5, 12));
110 }
111 }
112
~LabelButtonBorder()113 LabelButtonBorder::~LabelButtonBorder() {}
114
Paint(const View & view,gfx::Canvas * canvas)115 void LabelButtonBorder::Paint(const View& view, gfx::Canvas* canvas) {
116 const NativeThemeDelegate* native_theme_delegate =
117 static_cast<const LabelButton*>(&view);
118 ui::NativeTheme::Part part = native_theme_delegate->GetThemePart();
119 gfx::Rect rect(native_theme_delegate->GetThemePaintRect());
120 ui::NativeTheme::ExtraParams extra;
121 const ui::NativeTheme* theme = view.GetNativeTheme();
122 const gfx::Animation* animation = native_theme_delegate->GetThemeAnimation();
123 ui::NativeTheme::State state = native_theme_delegate->GetThemeState(&extra);
124
125 if (animation && animation->is_animating()) {
126 // Linearly interpolate background and foreground painters during animation.
127 const SkRect sk_rect = gfx::RectToSkRect(rect);
128 canvas->sk_canvas()->saveLayer(&sk_rect, NULL);
129 state = native_theme_delegate->GetBackgroundThemeState(&extra);
130 PaintHelper(this, canvas, theme, part, state, rect, extra);
131
132 SkPaint paint;
133 skia::RefPtr<SkXfermode> sk_lerp_xfer =
134 skia::AdoptRef(SkLerpXfermode::Create(animation->GetCurrentValue()));
135 paint.setXfermode(sk_lerp_xfer.get());
136 canvas->sk_canvas()->saveLayer(&sk_rect, &paint);
137 state = native_theme_delegate->GetForegroundThemeState(&extra);
138 PaintHelper(this, canvas, theme, part, state, rect, extra);
139 canvas->sk_canvas()->restore();
140
141 canvas->sk_canvas()->restore();
142 } else {
143 PaintHelper(this, canvas, theme, part, state, rect, extra);
144 }
145
146 // For inverted color schemes, draw a solid fill with the button color.
147 if (gfx::IsInvertedColorScheme()) {
148 rect.Inset(insets_);
149 canvas->FillRect(rect, extra.button.background_color);
150 }
151 }
152
GetInsets() const153 gfx::Insets LabelButtonBorder::GetInsets() const {
154 return insets_;
155 }
156
GetMinimumSize() const157 gfx::Size LabelButtonBorder::GetMinimumSize() const {
158 gfx::Size minimum_size;
159 for (int i = 0; i < 2; ++i) {
160 for (int j = 0; j < Button::STATE_COUNT; ++j) {
161 if (painters_[i][j])
162 minimum_size.SetToMax(painters_[i][j]->GetMinimumSize());
163 }
164 }
165 return minimum_size;
166 }
167
GetPainter(bool focused,Button::ButtonState state)168 Painter* LabelButtonBorder::GetPainter(bool focused,
169 Button::ButtonState state) {
170 return painters_[focused ? 1 : 0][state].get();
171 }
172
SetPainter(bool focused,Button::ButtonState state,Painter * painter)173 void LabelButtonBorder::SetPainter(bool focused,
174 Button::ButtonState state,
175 Painter* painter) {
176 painters_[focused ? 1 : 0][state].reset(painter);
177 }
178
179 } // namespace views
180