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.
5 #include "ui/views/controls/button/label_button.h"
7 #include "base/logging.h"
8 #include "grit/ui_resources.h"
9 #include "ui/base/resource/resource_bundle.h"
10 #include "ui/gfx/animation/throb_animation.h"
11 #include "ui/gfx/sys_color_change_listener.h"
12 #include "ui/native_theme/native_theme.h"
13 #include "ui/views/controls/button/label_button_border.h"
14 #include "ui/views/focus_border.h"
15 #include "ui/views/window/dialog_delegate.h"
18 #include "ui/native_theme/native_theme_win.h"
23 // The spacing between the icon and text.
24 const int kSpacing = 5;
26 // The length of the hover fade animation.
27 const int kHoverAnimationDurationMs = 170;
29 // Default text and shadow colors for STYLE_BUTTON.
30 const SkColor kStyleButtonTextColor = SK_ColorBLACK;
31 const SkColor kStyleButtonShadowColor = SK_ColorWHITE;
38 const char LabelButton::kViewClassName[] = "LabelButton";
40 LabelButton::LabelButton(ButtonListener* listener, const string16& text)
41 : CustomButton(listener),
42 image_(new ImageView()),
44 button_state_images_(),
45 button_state_colors_(),
46 explicitly_set_colors_(),
48 style_(STYLE_TEXTBUTTON) {
49 SetAnimationDuration(kHoverAnimationDurationMs);
53 image_->set_interactive(false);
56 label_->SetAutoColorReadabilityEnabled(false);
57 label_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
59 // Initialize the colors, border, and layout.
62 SetAccessibleName(text);
65 LabelButton::~LabelButton() {}
67 const gfx::ImageSkia& LabelButton::GetImage(ButtonState for_state) {
68 if (for_state != STATE_NORMAL && button_state_images_[for_state].isNull())
69 return button_state_images_[STATE_NORMAL];
70 return button_state_images_[for_state];
73 void LabelButton::SetImage(ButtonState for_state, const gfx::ImageSkia& image) {
74 button_state_images_[for_state] = image;
78 const string16& LabelButton::GetText() const {
79 return label_->text();
82 void LabelButton::SetText(const string16& text) {
83 SetAccessibleName(text);
84 label_->SetText(text);
87 void LabelButton::SetTextColor(ButtonState for_state, SkColor color) {
88 button_state_colors_[for_state] = color;
89 if (for_state == STATE_DISABLED)
90 label_->SetDisabledColor(color);
91 else if (for_state == state())
92 label_->SetEnabledColor(color);
93 explicitly_set_colors_[for_state] = true;
96 bool LabelButton::GetTextMultiLine() const {
97 return label_->is_multi_line();
100 void LabelButton::SetTextMultiLine(bool text_multi_line) {
101 label_->SetMultiLine(text_multi_line);
104 const gfx::Font& LabelButton::GetFont() const {
105 return label_->font();
108 void LabelButton::SetFont(const gfx::Font& font) {
109 label_->SetFont(font);
112 void LabelButton::SetElideBehavior(Label::ElideBehavior elide_behavior) {
113 label_->SetElideBehavior(elide_behavior);
116 gfx::HorizontalAlignment LabelButton::GetHorizontalAlignment() const {
117 return label_->horizontal_alignment();
120 void LabelButton::SetHorizontalAlignment(gfx::HorizontalAlignment alignment) {
121 label_->SetHorizontalAlignment(alignment);
125 void LabelButton::SetIsDefault(bool is_default) {
126 if (is_default == is_default_)
128 is_default_ = is_default;
129 ui::Accelerator accel(ui::VKEY_RETURN, ui::EF_NONE);
130 is_default_ ? AddAccelerator(accel) : RemoveAccelerator(accel);
132 // STYLE_BUTTON uses bold text to indicate default buttons.
133 if (style_ == STYLE_BUTTON) {
134 int style = label_->font().GetStyle();
135 style = is_default ? style | gfx::Font::BOLD : style & ~gfx::Font::BOLD;
136 label_->SetFont(label_->font().DeriveFont(0, style));
140 void LabelButton::SetStyle(ButtonStyle style) {
141 // Use the new button style instead of the native button style.
142 // TODO(msw): Officialy deprecate and remove STYLE_NATIVE_TEXTBUTTON.
143 if (DialogDelegate::UseNewStyle() && style == STYLE_NATIVE_TEXTBUTTON)
144 style = STYLE_BUTTON;
147 set_border(new LabelButtonBorder(style));
148 // Inset the button focus rect from the actual border; roughly match Windows.
149 set_focus_border(style == STYLE_BUTTON ?
150 NULL : FocusBorder::CreateDashedFocusBorder(3, 3, 3, 3));
151 if (style == STYLE_BUTTON || style == STYLE_NATIVE_TEXTBUTTON) {
152 label_->SetHorizontalAlignment(gfx::ALIGN_CENTER);
155 if (style == STYLE_BUTTON)
156 set_min_size(gfx::Size(70, 33));
157 // Invalidate the layout to pickup the new insets from the border.
159 ResetColorsFromNativeTheme();
162 gfx::Size LabelButton::GetPreferredSize() {
163 // Use a temporary label copy for sizing to avoid calculation side-effects.
164 gfx::Font font = GetFont();
165 Label label(GetText(), font);
166 label.SetMultiLine(GetTextMultiLine());
168 if (style() == STYLE_BUTTON) {
169 // Some text appears wider when rendered normally than when rendered bold.
170 // Accommodate the widest, as buttons may show bold and shouldn't resize.
171 const int current_width = label.GetPreferredSize().width();
172 label.SetFont(font.DeriveFont(0, font.GetStyle() ^ gfx::Font::BOLD));
173 if (label.GetPreferredSize().width() < current_width)
177 // Resize multi-line labels given the current limited available width.
178 const gfx::Size image_size(image_->GetPreferredSize());
179 const int image_width = image_size.width();
180 if (GetTextMultiLine() && (width() > image_width + kSpacing))
181 label.SizeToFit(width() - image_width - (image_width > 0 ? kSpacing : 0));
183 // Calculate the required size.
184 gfx::Size size(label.GetPreferredSize());
185 if (image_width > 0 && size.width() > 0)
186 size.Enlarge(kSpacing, 0);
187 size.SetToMax(gfx::Size(0, image_size.height()));
188 const gfx::Insets insets(GetInsets());
189 size.Enlarge(image_size.width() + insets.width(), insets.height());
191 // Increase the minimum size monotonically with the preferred size.
192 size.SetToMax(min_size_);
195 // Return the largest known size clamped to the maximum size (if valid).
196 if (max_size_.width() > 0)
197 size.set_width(std::min(max_size_.width(), size.width()));
198 if (max_size_.height() > 0)
199 size.set_height(std::min(max_size_.height(), size.height()));
203 void LabelButton::Layout() {
204 gfx::HorizontalAlignment adjusted_alignment = GetHorizontalAlignment();
205 if (base::i18n::IsRTL() && adjusted_alignment != gfx::ALIGN_CENTER)
206 adjusted_alignment = (adjusted_alignment == gfx::ALIGN_LEFT) ?
207 gfx::ALIGN_RIGHT : gfx::ALIGN_LEFT;
209 gfx::Rect child_area(GetLocalBounds());
210 child_area.Inset(GetInsets());
212 gfx::Size image_size(image_->GetPreferredSize());
213 image_size.set_width(std::min(image_size.width(), child_area.width()));
214 image_size.set_height(std::min(image_size.height(), child_area.height()));
216 // The label takes any remaining width after sizing the image, unless both
217 // views are centered. In that case, using the tighter preferred label width
218 // avoids wasted space within the label that would look like awkward padding.
219 gfx::Size label_size(child_area.size());
220 if (!image_size.IsEmpty() && !label_size.IsEmpty()) {
221 label_size.set_width(
222 std::max(child_area.width() - image_size.width() - kSpacing, 0));
223 if (adjusted_alignment == gfx::ALIGN_CENTER) {
224 // Ensure multi-line labels paired with images use their available width.
225 if (GetTextMultiLine())
226 label_->SizeToFit(label_size.width());
227 label_size.set_width(
228 std::min(label_size.width(), label_->GetPreferredSize().width()));
232 gfx::Point image_origin(child_area.origin());
233 image_origin.Offset(0, (child_area.height() - image_size.height()) / 2);
234 if (adjusted_alignment == gfx::ALIGN_CENTER) {
235 const int total_width = image_size.width() + label_size.width() +
236 ((image_size.width() > 0 && label_size.width() > 0) ? kSpacing : 0);
237 image_origin.Offset((child_area.width() - total_width) / 2, 0);
238 } else if (adjusted_alignment == gfx::ALIGN_RIGHT) {
239 image_origin.Offset(child_area.width() - image_size.width(), 0);
242 gfx::Point label_origin(child_area.origin());
243 if (!image_size.IsEmpty() &&adjusted_alignment != gfx::ALIGN_RIGHT)
244 label_origin.set_x(image_origin.x() + image_size.width() + kSpacing);
246 image_->SetBoundsRect(gfx::Rect(image_origin, image_size));
247 label_->SetBoundsRect(gfx::Rect(label_origin, label_size));
250 const char* LabelButton::GetClassName() const {
251 return kViewClassName;
254 void LabelButton::GetExtraParams(ui::NativeTheme::ExtraParams* params) const {
255 params->button.checked = false;
256 params->button.indeterminate = false;
257 params->button.is_default = is_default_;
258 params->button.is_focused = HasFocus() && IsAccessibilityFocusable();
259 params->button.has_border = style() == STYLE_NATIVE_TEXTBUTTON;
260 params->button.classic_state = 0;
261 params->button.background_color = label()->background_color();
264 void LabelButton::ResetColorsFromNativeTheme() {
265 const ui::NativeTheme* theme = GetNativeTheme();
266 SkColor colors[STATE_COUNT] = {
267 theme->GetSystemColor(ui::NativeTheme::kColorId_ButtonEnabledColor),
268 theme->GetSystemColor(ui::NativeTheme::kColorId_ButtonHoverColor),
269 theme->GetSystemColor(ui::NativeTheme::kColorId_ButtonHoverColor),
270 theme->GetSystemColor(ui::NativeTheme::kColorId_ButtonDisabledColor),
273 // Certain styles do not change text color when hovered or pressed.
274 bool constant_text_color = false;
276 constant_text_color |= (style() == STYLE_NATIVE_TEXTBUTTON &&
277 theme == ui::NativeThemeWin::instance());
280 // Use hardcoded colors for inverted color scheme support and STYLE_BUTTON.
281 if (gfx::IsInvertedColorScheme()) {
282 constant_text_color = true;
283 colors[STATE_NORMAL] = SK_ColorWHITE;
284 label_->SetBackgroundColor(SK_ColorBLACK);
285 label_->SetAutoColorReadabilityEnabled(true);
286 label_->ClearEmbellishing();
287 } else if (style() == STYLE_BUTTON) {
288 constant_text_color = true;
289 colors[STATE_NORMAL] = kStyleButtonTextColor;
290 label_->SetBackgroundColor(theme->GetSystemColor(
291 ui::NativeTheme::kColorId_ButtonBackgroundColor));
292 label_->SetAutoColorReadabilityEnabled(false);
293 label_->SetShadowColors(kStyleButtonShadowColor, kStyleButtonShadowColor);
294 label_->SetShadowOffset(0, 1);
297 if (constant_text_color)
298 colors[STATE_HOVERED] = colors[STATE_PRESSED] = colors[STATE_NORMAL];
300 for (size_t state = STATE_NORMAL; state < STATE_COUNT; ++state) {
301 if (!explicitly_set_colors_[state]) {
302 SetTextColor(static_cast<ButtonState>(state), colors[state]);
303 explicitly_set_colors_[state] = false;
308 void LabelButton::UpdateImage() {
309 image_->SetImage(GetImage(state()));
312 void LabelButton::StateChanged() {
313 const gfx::Size previous_image_size(image_->GetPreferredSize());
315 const SkColor color = button_state_colors_[state()];
316 if (state() != STATE_DISABLED && label_->enabled_color() != color)
317 label_->SetEnabledColor(color);
318 label_->SetEnabled(state() != STATE_DISABLED);
319 if (image_->GetPreferredSize() != previous_image_size)
323 void LabelButton::ChildPreferredSizeChanged(View* child) {
324 PreferredSizeChanged();
327 void LabelButton::OnNativeThemeChanged(const ui::NativeTheme* theme) {
328 ResetColorsFromNativeTheme();
331 ui::NativeTheme::Part LabelButton::GetThemePart() const {
332 return ui::NativeTheme::kPushButton;
335 gfx::Rect LabelButton::GetThemePaintRect() const {
336 return GetLocalBounds();
339 ui::NativeTheme::State LabelButton::GetThemeState(
340 ui::NativeTheme::ExtraParams* params) const {
341 GetExtraParams(params);
343 case STATE_NORMAL: return ui::NativeTheme::kNormal;
344 case STATE_HOVERED: return ui::NativeTheme::kHovered;
345 case STATE_PRESSED: return ui::NativeTheme::kPressed;
346 case STATE_DISABLED: return ui::NativeTheme::kDisabled;
347 case STATE_COUNT: NOTREACHED() << "Unknown state: " << state();
349 return ui::NativeTheme::kNormal;
352 const gfx::Animation* LabelButton::GetThemeAnimation() const {
354 if (style() == STYLE_NATIVE_TEXTBUTTON &&
355 GetNativeTheme() == ui::NativeThemeWin::instance()) {
356 return ui::NativeThemeWin::instance()->IsThemingActive() ?
357 hover_animation_.get() : NULL;
360 return hover_animation_.get();
363 ui::NativeTheme::State LabelButton::GetBackgroundThemeState(
364 ui::NativeTheme::ExtraParams* params) const {
365 GetExtraParams(params);
366 return ui::NativeTheme::kNormal;
369 ui::NativeTheme::State LabelButton::GetForegroundThemeState(
370 ui::NativeTheme::ExtraParams* params) const {
371 GetExtraParams(params);
372 return ui::NativeTheme::kHovered;