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| 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/scrollbar/native_scroll_bar_views.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "ui/events/keycodes/keyboard_codes.h" | |
| 9 #include "ui/gfx/canvas.h" | |
| 10 #include "ui/gfx/path.h" | |
| 11 #include "ui/views/controls/button/custom_button.h" | |
| 12 #include "ui/views/controls/focusable_border.h" | |
| 13 #include "ui/views/controls/scrollbar/base_scroll_bar_button.h" | |
| 14 #include "ui/views/controls/scrollbar/base_scroll_bar_thumb.h" | |
| 15 #include "ui/views/controls/scrollbar/native_scroll_bar.h" | |
| 16 #include "ui/views/controls/scrollbar/scroll_bar.h" | |
| 17 | |
| 18 namespace views { | |
| 19 | |
| 20 namespace { | |
| 21 | |
| 22 // Wrapper for the scroll buttons. | |
| 23 class ScrollBarButton : public BaseScrollBarButton { | |
| 24 public: | |
| 25 enum Type { | |
| 26 UP, | |
| 27 DOWN, | |
| 28 LEFT, | |
| 29 RIGHT, | |
| 30 }; | |
| 31 | |
| 32 ScrollBarButton(ButtonListener* listener, Type type); | |
| 33 virtual ~ScrollBarButton(); | |
| 34 | |
| 35 virtual gfx::Size GetPreferredSize() const override; | |
| 36 virtual const char* GetClassName() const override { | |
| 37 return "ScrollBarButton"; | |
| 38 } | |
| 39 | |
| 40 protected: | |
| 41 virtual void OnPaint(gfx::Canvas* canvas) override; | |
| 42 | |
| 43 private: | |
| 44 ui::NativeTheme::ExtraParams GetNativeThemeParams() const; | |
| 45 ui::NativeTheme::Part GetNativeThemePart() const; | |
| 46 ui::NativeTheme::State GetNativeThemeState() const; | |
| 47 | |
| 48 Type type_; | |
| 49 }; | |
| 50 | |
| 51 // Wrapper for the scroll thumb | |
| 52 class ScrollBarThumb : public BaseScrollBarThumb { | |
| 53 public: | |
| 54 explicit ScrollBarThumb(BaseScrollBar* scroll_bar); | |
| 55 virtual ~ScrollBarThumb(); | |
| 56 | |
| 57 virtual gfx::Size GetPreferredSize() const override; | |
| 58 virtual const char* GetClassName() const override { | |
| 59 return "ScrollBarThumb"; | |
| 60 } | |
| 61 | |
| 62 protected: | |
| 63 virtual void OnPaint(gfx::Canvas* canvas) override; | |
| 64 | |
| 65 private: | |
| 66 ui::NativeTheme::ExtraParams GetNativeThemeParams() const; | |
| 67 ui::NativeTheme::Part GetNativeThemePart() const; | |
| 68 ui::NativeTheme::State GetNativeThemeState() const; | |
| 69 | |
| 70 ScrollBar* scroll_bar_; | |
| 71 }; | |
| 72 | |
| 73 ///////////////////////////////////////////////////////////////////////////// | |
| 74 // ScrollBarButton | |
| 75 | |
| 76 ScrollBarButton::ScrollBarButton(ButtonListener* listener, Type type) | |
| 77 : BaseScrollBarButton(listener), | |
| 78 type_(type) { | |
| 79 SetFocusable(false); | |
| 80 SetAccessibilityFocusable(false); | |
| 81 } | |
| 82 | |
| 83 ScrollBarButton::~ScrollBarButton() { | |
| 84 } | |
| 85 | |
| 86 gfx::Size ScrollBarButton::GetPreferredSize() const { | |
| 87 return GetNativeTheme()->GetPartSize(GetNativeThemePart(), | |
| 88 GetNativeThemeState(), | |
| 89 GetNativeThemeParams()); | |
| 90 } | |
| 91 | |
| 92 void ScrollBarButton::OnPaint(gfx::Canvas* canvas) { | |
| 93 gfx::Rect bounds(GetPreferredSize()); | |
| 94 GetNativeTheme()->Paint(canvas->sk_canvas(), GetNativeThemePart(), | |
| 95 GetNativeThemeState(), bounds, | |
| 96 GetNativeThemeParams()); | |
| 97 } | |
| 98 | |
| 99 ui::NativeTheme::ExtraParams | |
| 100 ScrollBarButton::GetNativeThemeParams() const { | |
| 101 ui::NativeTheme::ExtraParams params; | |
| 102 | |
| 103 switch (state_) { | |
| 104 case CustomButton::STATE_HOVERED: | |
| 105 params.scrollbar_arrow.is_hovering = true; | |
| 106 break; | |
| 107 default: | |
| 108 params.scrollbar_arrow.is_hovering = false; | |
| 109 break; | |
| 110 } | |
| 111 | |
| 112 return params; | |
| 113 } | |
| 114 | |
| 115 ui::NativeTheme::Part | |
| 116 ScrollBarButton::GetNativeThemePart() const { | |
| 117 switch (type_) { | |
| 118 case UP: | |
| 119 return ui::NativeTheme::kScrollbarUpArrow; | |
| 120 case DOWN: | |
| 121 return ui::NativeTheme::kScrollbarDownArrow; | |
| 122 case LEFT: | |
| 123 return ui::NativeTheme::kScrollbarLeftArrow; | |
| 124 case RIGHT: | |
| 125 return ui::NativeTheme::kScrollbarRightArrow; | |
| 126 default: | |
| 127 return ui::NativeTheme::kScrollbarUpArrow; | |
| 128 } | |
| 129 } | |
| 130 | |
| 131 ui::NativeTheme::State | |
| 132 ScrollBarButton::GetNativeThemeState() const { | |
| 133 ui::NativeTheme::State state; | |
| 134 | |
| 135 switch (state_) { | |
| 136 case CustomButton::STATE_HOVERED: | |
| 137 state = ui::NativeTheme::kHovered; | |
| 138 break; | |
| 139 case CustomButton::STATE_PRESSED: | |
| 140 state = ui::NativeTheme::kPressed; | |
| 141 break; | |
| 142 case CustomButton::STATE_DISABLED: | |
| 143 state = ui::NativeTheme::kDisabled; | |
| 144 break; | |
| 145 case CustomButton::STATE_NORMAL: | |
| 146 default: | |
| 147 state = ui::NativeTheme::kNormal; | |
| 148 break; | |
| 149 } | |
| 150 | |
| 151 return state; | |
| 152 } | |
| 153 | |
| 154 ///////////////////////////////////////////////////////////////////////////// | |
| 155 // ScrollBarThumb | |
| 156 | |
| 157 ScrollBarThumb::ScrollBarThumb(BaseScrollBar* scroll_bar) | |
| 158 : BaseScrollBarThumb(scroll_bar), | |
| 159 scroll_bar_(scroll_bar) { | |
| 160 SetFocusable(false); | |
| 161 SetAccessibilityFocusable(false); | |
| 162 } | |
| 163 | |
| 164 ScrollBarThumb::~ScrollBarThumb() { | |
| 165 } | |
| 166 | |
| 167 gfx::Size ScrollBarThumb::GetPreferredSize() const { | |
| 168 return GetNativeTheme()->GetPartSize(GetNativeThemePart(), | |
| 169 GetNativeThemeState(), | |
| 170 GetNativeThemeParams()); | |
| 171 } | |
| 172 | |
| 173 void ScrollBarThumb::OnPaint(gfx::Canvas* canvas) { | |
| 174 const gfx::Rect local_bounds(GetLocalBounds()); | |
| 175 const ui::NativeTheme::State theme_state = GetNativeThemeState(); | |
| 176 const ui::NativeTheme::ExtraParams extra_params(GetNativeThemeParams()); | |
| 177 GetNativeTheme()->Paint(canvas->sk_canvas(), | |
| 178 GetNativeThemePart(), | |
| 179 theme_state, | |
| 180 local_bounds, | |
| 181 extra_params); | |
| 182 const ui::NativeTheme::Part gripper_part = scroll_bar_->IsHorizontal() ? | |
| 183 ui::NativeTheme::kScrollbarHorizontalGripper : | |
| 184 ui::NativeTheme::kScrollbarVerticalGripper; | |
| 185 GetNativeTheme()->Paint(canvas->sk_canvas(), gripper_part, theme_state, | |
| 186 local_bounds, extra_params); | |
| 187 } | |
| 188 | |
| 189 ui::NativeTheme::ExtraParams ScrollBarThumb::GetNativeThemeParams() const { | |
| 190 // This gives the behavior we want. | |
| 191 ui::NativeTheme::ExtraParams params; | |
| 192 params.scrollbar_thumb.is_hovering = | |
| 193 (GetState() != CustomButton::STATE_HOVERED); | |
| 194 return params; | |
| 195 } | |
| 196 | |
| 197 ui::NativeTheme::Part ScrollBarThumb::GetNativeThemePart() const { | |
| 198 if (scroll_bar_->IsHorizontal()) | |
| 199 return ui::NativeTheme::kScrollbarHorizontalThumb; | |
| 200 return ui::NativeTheme::kScrollbarVerticalThumb; | |
| 201 } | |
| 202 | |
| 203 ui::NativeTheme::State ScrollBarThumb::GetNativeThemeState() const { | |
| 204 ui::NativeTheme::State state; | |
| 205 | |
| 206 switch (GetState()) { | |
| 207 case CustomButton::STATE_HOVERED: | |
| 208 state = ui::NativeTheme::kHovered; | |
| 209 break; | |
| 210 case CustomButton::STATE_PRESSED: | |
| 211 state = ui::NativeTheme::kPressed; | |
| 212 break; | |
| 213 case CustomButton::STATE_DISABLED: | |
| 214 state = ui::NativeTheme::kDisabled; | |
| 215 break; | |
| 216 case CustomButton::STATE_NORMAL: | |
| 217 default: | |
| 218 state = ui::NativeTheme::kNormal; | |
| 219 break; | |
| 220 } | |
| 221 | |
| 222 return state; | |
| 223 } | |
| 224 | |
| 225 } // namespace | |
| 226 | |
| 227 //////////////////////////////////////////////////////////////////////////////// | |
| 228 // NativeScrollBarViews, public: | |
| 229 | |
| 230 const char NativeScrollBarViews::kViewClassName[] = "NativeScrollBarViews"; | |
| 231 | |
| 232 NativeScrollBarViews::NativeScrollBarViews(NativeScrollBar* scroll_bar) | |
| 233 : BaseScrollBar(scroll_bar->IsHorizontal(), | |
| 234 new ScrollBarThumb(this)), | |
| 235 native_scroll_bar_(scroll_bar) { | |
| 236 set_controller(native_scroll_bar_->controller()); | |
| 237 | |
| 238 if (native_scroll_bar_->IsHorizontal()) { | |
| 239 prev_button_ = new ScrollBarButton(this, ScrollBarButton::LEFT); | |
| 240 next_button_ = new ScrollBarButton(this, ScrollBarButton::RIGHT); | |
| 241 | |
| 242 part_ = ui::NativeTheme::kScrollbarHorizontalTrack; | |
| 243 } else { | |
| 244 prev_button_ = new ScrollBarButton(this, ScrollBarButton::UP); | |
| 245 next_button_ = new ScrollBarButton(this, ScrollBarButton::DOWN); | |
| 246 | |
| 247 part_ = ui::NativeTheme::kScrollbarVerticalTrack; | |
| 248 } | |
| 249 | |
| 250 state_ = ui::NativeTheme::kNormal; | |
| 251 | |
| 252 AddChildView(prev_button_); | |
| 253 AddChildView(next_button_); | |
| 254 | |
| 255 prev_button_->set_context_menu_controller(this); | |
| 256 next_button_->set_context_menu_controller(this); | |
| 257 } | |
| 258 | |
| 259 NativeScrollBarViews::~NativeScrollBarViews() { | |
| 260 } | |
| 261 | |
| 262 //////////////////////////////////////////////////////////////////////////////// | |
| 263 // NativeScrollBarViews, View overrides: | |
| 264 | |
| 265 void NativeScrollBarViews::Layout() { | |
| 266 gfx::Size size = prev_button_->GetPreferredSize(); | |
| 267 prev_button_->SetBounds(0, 0, size.width(), size.height()); | |
| 268 | |
| 269 if (native_scroll_bar_->IsHorizontal()) { | |
| 270 next_button_->SetBounds(width() - size.width(), 0, | |
| 271 size.width(), size.height()); | |
| 272 } else { | |
| 273 next_button_->SetBounds(0, height() - size.height(), | |
| 274 size.width(), size.height()); | |
| 275 } | |
| 276 | |
| 277 GetThumb()->SetBoundsRect(GetTrackBounds()); | |
| 278 } | |
| 279 | |
| 280 void NativeScrollBarViews::OnPaint(gfx::Canvas* canvas) { | |
| 281 gfx::Rect bounds = GetTrackBounds(); | |
| 282 | |
| 283 if (bounds.IsEmpty()) | |
| 284 return; | |
| 285 | |
| 286 params_.scrollbar_track.track_x = bounds.x(); | |
| 287 params_.scrollbar_track.track_y = bounds.y(); | |
| 288 params_.scrollbar_track.track_width = bounds.width(); | |
| 289 params_.scrollbar_track.track_height = bounds.height(); | |
| 290 params_.scrollbar_track.classic_state = 0; | |
| 291 | |
| 292 GetNativeTheme()->Paint(canvas->sk_canvas(), part_, state_, bounds, params_); | |
| 293 } | |
| 294 | |
| 295 gfx::Size NativeScrollBarViews::GetPreferredSize() const { | |
| 296 const ui::NativeTheme* theme = native_scroll_bar_->GetNativeTheme(); | |
| 297 if (native_scroll_bar_->IsHorizontal()) | |
| 298 return gfx::Size(0, GetHorizontalScrollBarHeight(theme)); | |
| 299 return gfx::Size(GetVerticalScrollBarWidth(theme), 0); | |
| 300 } | |
| 301 | |
| 302 const char* NativeScrollBarViews::GetClassName() const { | |
| 303 return kViewClassName; | |
| 304 } | |
| 305 | |
| 306 int NativeScrollBarViews::GetLayoutSize() const { | |
| 307 gfx::Size size = prev_button_->GetPreferredSize(); | |
| 308 return IsHorizontal() ? size.height() : size.width(); | |
| 309 } | |
| 310 | |
| 311 void NativeScrollBarViews::ScrollToPosition(int position) { | |
| 312 controller()->ScrollToPosition(native_scroll_bar_, position); | |
| 313 } | |
| 314 | |
| 315 int NativeScrollBarViews::GetScrollIncrement(bool is_page, bool is_positive) { | |
| 316 return controller()->GetScrollIncrement(native_scroll_bar_, | |
| 317 is_page, | |
| 318 is_positive); | |
| 319 } | |
| 320 | |
| 321 ////////////////////////////////////////////////////////////////////////////// | |
| 322 // BaseButton::ButtonListener overrides: | |
| 323 | |
| 324 void NativeScrollBarViews::ButtonPressed(Button* sender, | |
| 325 const ui::Event& event) { | |
| 326 if (sender == prev_button_) { | |
| 327 ScrollByAmount(SCROLL_PREV_LINE); | |
| 328 } else if (sender == next_button_) { | |
| 329 ScrollByAmount(SCROLL_NEXT_LINE); | |
| 330 } | |
| 331 } | |
| 332 | |
| 333 //////////////////////////////////////////////////////////////////////////////// | |
| 334 // NativeScrollBarViews, NativeScrollBarWrapper overrides: | |
| 335 | |
| 336 int NativeScrollBarViews::GetPosition() const { | |
| 337 return BaseScrollBar::GetPosition(); | |
| 338 } | |
| 339 | |
| 340 View* NativeScrollBarViews::GetView() { | |
| 341 return this; | |
| 342 } | |
| 343 | |
| 344 void NativeScrollBarViews::Update(int viewport_size, | |
| 345 int content_size, | |
| 346 int current_pos) { | |
| 347 BaseScrollBar::Update(viewport_size, content_size, current_pos); | |
| 348 } | |
| 349 | |
| 350 //////////////////////////////////////////////////////////////////////////////// | |
| 351 // NativeScrollBarViews, private: | |
| 352 | |
| 353 gfx::Rect NativeScrollBarViews::GetTrackBounds() const { | |
| 354 gfx::Rect bounds = GetLocalBounds(); | |
| 355 gfx::Size size = prev_button_->GetPreferredSize(); | |
| 356 BaseScrollBarThumb* thumb = GetThumb(); | |
| 357 | |
| 358 if (native_scroll_bar_->IsHorizontal()) { | |
| 359 bounds.set_x(bounds.x() + size.width()); | |
| 360 bounds.set_width(std::max(0, bounds.width() - 2 * size.width())); | |
| 361 bounds.set_height(thumb->GetPreferredSize().height()); | |
| 362 } else { | |
| 363 bounds.set_y(bounds.y() + size.height()); | |
| 364 bounds.set_height(std::max(0, bounds.height() - 2 * size.height())); | |
| 365 bounds.set_width(thumb->GetPreferredSize().width()); | |
| 366 } | |
| 367 | |
| 368 return bounds; | |
| 369 } | |
| 370 | |
| 371 //////////////////////////////////////////////////////////////////////////////// | |
| 372 // NativewScrollBarWrapper, public: | |
| 373 | |
| 374 // static | |
| 375 NativeScrollBarWrapper* NativeScrollBarWrapper::CreateWrapper( | |
| 376 NativeScrollBar* scroll_bar) { | |
| 377 return new NativeScrollBarViews(scroll_bar); | |
| 378 } | |
| 379 | |
| 380 // static | |
| 381 int NativeScrollBarWrapper::GetHorizontalScrollBarHeight( | |
| 382 const ui::NativeTheme* theme) { | |
| 383 if (!theme) | |
| 384 theme = ui::NativeTheme::instance(); | |
| 385 ui::NativeTheme::ExtraParams button_params; | |
| 386 button_params.scrollbar_arrow.is_hovering = false; | |
| 387 gfx::Size button_size = theme->GetPartSize( | |
| 388 ui::NativeTheme::kScrollbarLeftArrow, | |
| 389 ui::NativeTheme::kNormal, | |
| 390 button_params); | |
| 391 | |
| 392 ui::NativeTheme::ExtraParams thumb_params; | |
| 393 thumb_params.scrollbar_thumb.is_hovering = false; | |
| 394 gfx::Size track_size = theme->GetPartSize( | |
| 395 ui::NativeTheme::kScrollbarHorizontalThumb, | |
| 396 ui::NativeTheme::kNormal, | |
| 397 thumb_params); | |
| 398 | |
| 399 return std::max(track_size.height(), button_size.height()); | |
| 400 } | |
| 401 | |
| 402 // static | |
| 403 int NativeScrollBarWrapper::GetVerticalScrollBarWidth( | |
| 404 const ui::NativeTheme* theme) { | |
| 405 if (!theme) | |
| 406 theme = ui::NativeTheme::instance(); | |
| 407 ui::NativeTheme::ExtraParams button_params; | |
| 408 button_params.scrollbar_arrow.is_hovering = false; | |
| 409 gfx::Size button_size = theme->GetPartSize( | |
| 410 ui::NativeTheme::kScrollbarUpArrow, | |
| 411 ui::NativeTheme::kNormal, | |
| 412 button_params); | |
| 413 | |
| 414 ui::NativeTheme::ExtraParams thumb_params; | |
| 415 thumb_params.scrollbar_thumb.is_hovering = false; | |
| 416 gfx::Size track_size = theme->GetPartSize( | |
| 417 ui::NativeTheme::kScrollbarVerticalThumb, | |
| 418 ui::NativeTheme::kNormal, | |
| 419 thumb_params); | |
| 420 | |
| 421 return std::max(track_size.width(), button_size.width()); | |
| 422 } | |
| 423 | |
| 424 } // namespace views | |
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