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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/controls/combobox/native_combobox_views.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 | |
| 9 #include "base/command_line.h" | |
| 10 #include "base/utf_string_conversions.h" | |
| 11 #include "ui/base/keycodes/keyboard_codes.h" | |
| 12 #include "ui/base/models/combobox_model.h" | |
| 13 #include "ui/base/resource/resource_bundle.h" | |
| 14 #include "ui/gfx/canvas.h" | |
| 15 #include "ui/gfx/canvas_skia.h" | |
| 16 #include "ui/gfx/font.h" | |
| 17 #include "ui/gfx/path.h" | |
| 18 #include "ui/views/widget/root_view.h" | |
| 19 #include "ui/views/widget/widget.h" | |
| 20 #include "views/background.h" | |
| 21 #include "views/border.h" | |
| 22 #include "views/controls/combobox/combobox.h" | |
| 23 #include "views/controls/focusable_border.h" | |
| 24 #include "views/controls/menu/menu_runner.h" | |
| 25 #include "views/controls/menu/submenu_view.h" | |
| 26 | |
| 27 #if defined(OS_LINUX) | |
| 28 #include "ui/gfx/gtk_util.h" | |
| 29 #endif | |
| 30 | |
| 31 namespace { | |
| 32 | |
| 33 // Define the size of the insets. | |
| 34 const int kTopInsetSize = 4; | |
| 35 const int kLeftInsetSize = 4; | |
| 36 const int kBottomInsetSize = 4; | |
| 37 const int kRightInsetSize = 4; | |
| 38 | |
| 39 // Limit how small a combobox can be. | |
| 40 const int kMinComboboxWidth = 148; | |
| 41 | |
| 42 // Size of the combobox arrow. | |
| 43 const int kComboboxArrowSize = 9; | |
| 44 const int kComboboxArrowOffset = 7; | |
| 45 const int kComboboxArrowMargin = 12; | |
| 46 | |
| 47 // Color settings for text and border. | |
| 48 // These are tentative, and should be derived from theme, system | |
| 49 // settings and current settings. | |
| 50 const SkColor kDefaultBorderColor = SK_ColorGRAY; | |
| 51 const SkColor kTextColor = SK_ColorBLACK; | |
| 52 | |
| 53 // Define the id of the first item in the menu (since it needs to be > 0) | |
| 54 const int kFirstMenuItemId = 1000; | |
| 55 | |
| 56 } // namespace | |
| 57 | |
| 58 namespace views { | |
| 59 | |
| 60 const char NativeComboboxViews::kViewClassName[] = | |
| 61 "views/NativeComboboxViews"; | |
| 62 | |
| 63 NativeComboboxViews::NativeComboboxViews(Combobox* parent) | |
| 64 : combobox_(parent), | |
| 65 text_border_(new FocusableBorder()), | |
| 66 dropdown_open_(false), | |
| 67 selected_item_(-1), | |
| 68 content_width_(0), | |
| 69 content_height_(0) { | |
| 70 set_border(text_border_); | |
| 71 } | |
| 72 | |
| 73 NativeComboboxViews::~NativeComboboxViews() { | |
| 74 } | |
| 75 | |
| 76 //////////////////////////////////////////////////////////////////////////////// | |
| 77 // NativeComboboxViews, View overrides: | |
| 78 | |
| 79 bool NativeComboboxViews::OnMousePressed(const views::MouseEvent& mouse_event) { | |
| 80 combobox_->RequestFocus(); | |
| 81 if (mouse_event.IsLeftMouseButton()) { | |
| 82 UpdateFromModel(); | |
| 83 ShowDropDownMenu(); | |
| 84 } | |
| 85 | |
| 86 return true; | |
| 87 } | |
| 88 | |
| 89 bool NativeComboboxViews::OnMouseDragged(const views::MouseEvent& mouse_event) { | |
| 90 return true; | |
| 91 } | |
| 92 | |
| 93 bool NativeComboboxViews::OnKeyPressed(const views::KeyEvent& key_event) { | |
| 94 // TODO(oshima): handle IME. | |
| 95 DCHECK(key_event.type() == ui::ET_KEY_PRESSED); | |
| 96 | |
| 97 // Check if we are in the default state (-1) and set to first item. | |
| 98 if(selected_item_ == -1) | |
| 99 selected_item_ = 0; | |
| 100 | |
| 101 int new_item = selected_item_; | |
| 102 switch(key_event.key_code()){ | |
| 103 | |
| 104 // move to the next element if any | |
| 105 case ui::VKEY_DOWN: | |
| 106 if (new_item < (combobox_->model()->GetItemCount() - 1)) | |
| 107 new_item++; | |
| 108 break; | |
| 109 | |
| 110 // move to the end of the list | |
| 111 case ui::VKEY_END: | |
| 112 case ui::VKEY_NEXT: | |
| 113 new_item = combobox_->model()->GetItemCount() - 1; | |
| 114 break; | |
| 115 | |
| 116 // move to the top of the list | |
| 117 case ui::VKEY_HOME: | |
| 118 case ui::VKEY_PRIOR: | |
| 119 new_item = 0; | |
| 120 break; | |
| 121 | |
| 122 // move to the previous element if any | |
| 123 case ui::VKEY_UP: | |
| 124 if (new_item > 0) | |
| 125 new_item--; | |
| 126 break; | |
| 127 | |
| 128 default: | |
| 129 return false; | |
| 130 | |
| 131 } | |
| 132 | |
| 133 if(new_item != selected_item_) { | |
| 134 selected_item_ = new_item; | |
| 135 combobox_->SelectionChanged(); | |
| 136 SchedulePaint(); | |
| 137 } | |
| 138 | |
| 139 return true; | |
| 140 } | |
| 141 | |
| 142 bool NativeComboboxViews::OnKeyReleased(const views::KeyEvent& key_event) { | |
| 143 return true; | |
| 144 } | |
| 145 | |
| 146 void NativeComboboxViews::OnPaint(gfx::Canvas* canvas) { | |
| 147 text_border_->set_has_focus(combobox_->HasFocus()); | |
| 148 OnPaintBackground(canvas); | |
| 149 PaintText(canvas); | |
| 150 OnPaintBorder(canvas); | |
| 151 } | |
| 152 | |
| 153 void NativeComboboxViews::OnFocus() { | |
| 154 NOTREACHED(); | |
| 155 } | |
| 156 | |
| 157 void NativeComboboxViews::OnBlur() { | |
| 158 NOTREACHED(); | |
| 159 } | |
| 160 | |
| 161 ///////////////////////////////////////////////////////////////// | |
| 162 // NativeComboboxViews, NativeComboboxWrapper overrides: | |
| 163 | |
| 164 void NativeComboboxViews::UpdateFromModel() { | |
| 165 int max_width = 0; | |
| 166 const gfx::Font &font = GetFont(); | |
| 167 | |
| 168 MenuItemView* menu = new MenuItemView(this); | |
| 169 // MenuRunner owns |menu|. | |
| 170 dropdown_list_menu_runner_.reset(new MenuRunner(menu)); | |
| 171 | |
| 172 int num_items = combobox_->model()->GetItemCount(); | |
| 173 for (int i = 0; i < num_items; ++i) { | |
| 174 string16 text = combobox_->model()->GetItemAt(i); | |
| 175 | |
| 176 // Inserting the Unicode formatting characters if necessary so that the | |
| 177 // text is displayed correctly in right-to-left UIs. | |
| 178 base::i18n::AdjustStringForLocaleDirection(&text); | |
| 179 | |
| 180 menu->AppendMenuItem(i + kFirstMenuItemId, text, MenuItemView::NORMAL); | |
| 181 max_width = std::max(max_width, font.GetStringWidth(text)); | |
| 182 } | |
| 183 | |
| 184 content_width_ = max_width; | |
| 185 content_height_ = font.GetFontSize(); | |
| 186 } | |
| 187 | |
| 188 void NativeComboboxViews::UpdateSelectedItem() { | |
| 189 selected_item_ = combobox_->selected_item(); | |
| 190 } | |
| 191 | |
| 192 void NativeComboboxViews::UpdateEnabled() { | |
| 193 SetEnabled(combobox_->IsEnabled()); | |
| 194 } | |
| 195 | |
| 196 int NativeComboboxViews::GetSelectedItem() const { | |
| 197 return selected_item_; | |
| 198 } | |
| 199 | |
| 200 bool NativeComboboxViews::IsDropdownOpen() const { | |
| 201 return dropdown_open_; | |
| 202 } | |
| 203 | |
| 204 gfx::Size NativeComboboxViews::GetPreferredSize() { | |
| 205 if (content_width_ == 0) | |
| 206 UpdateFromModel(); | |
| 207 | |
| 208 // TODO(saintlou) the preferred size will drive the local bounds | |
| 209 // which in turn is used to set the minimum width for the dropdown | |
| 210 gfx::Insets insets = GetInsets(); | |
| 211 return gfx::Size(std::min(kMinComboboxWidth, | |
| 212 content_width_ + 2 * (insets.width())), | |
| 213 content_height_ + 2 * (insets.height())); | |
| 214 } | |
| 215 | |
| 216 View* NativeComboboxViews::GetView() { | |
| 217 return this; | |
| 218 } | |
| 219 | |
| 220 void NativeComboboxViews::SetFocus() { | |
| 221 text_border_->set_has_focus(true); | |
| 222 } | |
| 223 | |
| 224 bool NativeComboboxViews::HandleKeyPressed(const KeyEvent& e) { | |
| 225 return OnKeyPressed(e); | |
| 226 } | |
| 227 | |
| 228 bool NativeComboboxViews::HandleKeyReleased(const KeyEvent& e) { | |
| 229 return true; | |
| 230 } | |
| 231 | |
| 232 void NativeComboboxViews::HandleFocus() { | |
| 233 SchedulePaint(); | |
| 234 } | |
| 235 | |
| 236 void NativeComboboxViews::HandleBlur() { | |
| 237 } | |
| 238 | |
| 239 gfx::NativeView NativeComboboxViews::GetTestingHandle() const { | |
| 240 NOTREACHED(); | |
| 241 return NULL; | |
| 242 } | |
| 243 | |
| 244 ///////////////////////////////////////////////////////////////// | |
| 245 // NativeComboboxViews, views::MenuDelegate overrides: | |
| 246 // (note that the id received is offset by kFirstMenuItemId) | |
| 247 | |
| 248 bool NativeComboboxViews::IsItemChecked(int id) const { | |
| 249 return false; | |
| 250 } | |
| 251 | |
| 252 bool NativeComboboxViews::IsCommandEnabled(int id) const { | |
| 253 return true; | |
| 254 } | |
| 255 | |
| 256 void NativeComboboxViews::ExecuteCommand(int id) { | |
| 257 // revert menu offset to map back to combobox model | |
| 258 id -= kFirstMenuItemId; | |
| 259 DCHECK_LT(id, combobox_->model()->GetItemCount()); | |
| 260 selected_item_ = id; | |
| 261 combobox_->SelectionChanged(); | |
| 262 SchedulePaint(); | |
| 263 } | |
| 264 | |
| 265 bool NativeComboboxViews::GetAccelerator(int id, ui::Accelerator* accel) { | |
| 266 return false; | |
| 267 } | |
| 268 | |
| 269 ///////////////////////////////////////////////////////////////// | |
| 270 // NativeComboboxViews private methods: | |
| 271 | |
| 272 const gfx::Font& NativeComboboxViews::GetFont() const { | |
| 273 ResourceBundle& rb = ResourceBundle::GetSharedInstance(); | |
| 274 return rb.GetFont(ResourceBundle::BaseFont); | |
| 275 } | |
| 276 | |
| 277 // tip_x and tip_y are the coordinates of the tip of an arrow head which is | |
| 278 // drawn as an isoscele triangle | |
| 279 // shift_x and shift_y are offset from tip_x and tip_y to specify the relative | |
| 280 // positions of the 2 equal angles (ie not the angle at the tip of the arrow) | |
| 281 // Note: the width of the base (the side opposite the tip) is 2 * shift_x | |
| 282 void NativeComboboxViews::DrawArrow(gfx::Canvas* canvas, | |
| 283 int tip_x, | |
| 284 int tip_y, | |
| 285 int shift_x, | |
| 286 int shift_y) const { | |
| 287 SkPaint paint; | |
| 288 paint.setStyle(SkPaint::kStrokeAndFill_Style); | |
| 289 paint.setColor(kTextColor); | |
| 290 paint.setAntiAlias(true); | |
| 291 gfx::Path path; | |
| 292 path.incReserve(4); | |
| 293 path.moveTo(SkIntToScalar(tip_x), SkIntToScalar(tip_y)); | |
| 294 path.lineTo(SkIntToScalar(tip_x + shift_x), SkIntToScalar(tip_y + shift_y)); | |
| 295 path.lineTo(SkIntToScalar(tip_x - shift_x), SkIntToScalar(tip_y + shift_y)); | |
| 296 path.close(); | |
| 297 canvas->GetSkCanvas()->drawPath(path, paint); | |
| 298 } | |
| 299 | |
| 300 | |
| 301 void NativeComboboxViews::PaintText(gfx::Canvas* canvas) { | |
| 302 gfx::Insets insets = GetInsets(); | |
| 303 | |
| 304 canvas->Save(); | |
| 305 canvas->ClipRect(GetContentsBounds()); | |
| 306 | |
| 307 int x = insets.left(); | |
| 308 int y = insets.top(); | |
| 309 int text_height = height() - insets.height(); | |
| 310 SkColor text_color = kTextColor; | |
| 311 | |
| 312 int index = GetSelectedItem(); | |
| 313 if (index < 0 || index > combobox_->model()->GetItemCount()) | |
| 314 index = 0; | |
| 315 string16 text = combobox_->model()->GetItemAt(index); | |
| 316 | |
| 317 const gfx::Font& font = GetFont(); | |
| 318 int width = font.GetStringWidth(text); | |
| 319 | |
| 320 canvas->DrawStringInt(text, font, text_color, x, y, width, text_height); | |
| 321 | |
| 322 // draw the double arrow | |
| 323 gfx::Rect lb = GetLocalBounds(); | |
| 324 DrawArrow(canvas, | |
| 325 lb.width() - (kComboboxArrowSize / 2) - kComboboxArrowOffset, | |
| 326 lb.height() / 2 - kComboboxArrowSize, | |
| 327 kComboboxArrowSize / 2, | |
| 328 kComboboxArrowSize - 2); | |
| 329 DrawArrow(canvas, | |
| 330 lb.width() - (kComboboxArrowSize / 2) - kComboboxArrowOffset, | |
| 331 lb.height() / 2 + kComboboxArrowSize, | |
| 332 -kComboboxArrowSize / 2, | |
| 333 -(kComboboxArrowSize - 2)); | |
| 334 | |
| 335 // draw the margin | |
| 336 canvas->DrawLineInt(kDefaultBorderColor, | |
| 337 lb.width() - kComboboxArrowSize - kComboboxArrowMargin, | |
| 338 kTopInsetSize, | |
| 339 lb.width() - kComboboxArrowSize - kComboboxArrowMargin, | |
| 340 lb.height() - kBottomInsetSize); | |
| 341 | |
| 342 canvas->Restore(); | |
| 343 } | |
| 344 | |
| 345 void NativeComboboxViews::ShowDropDownMenu() { | |
| 346 | |
| 347 if (!dropdown_list_menu_runner_.get()) | |
| 348 UpdateFromModel(); | |
| 349 | |
| 350 // Extend the menu to the width of the combobox. | |
| 351 SubmenuView* submenu = dropdown_list_menu_runner_->GetMenu()->CreateSubmenu(); | |
| 352 submenu->set_minimum_preferred_width(size().width()); | |
| 353 | |
| 354 gfx::Rect lb = GetLocalBounds(); | |
| 355 gfx::Point menu_position(lb.origin()); | |
| 356 View::ConvertPointToScreen(this, &menu_position); | |
| 357 if (menu_position.x() < 0) | |
| 358 menu_position.set_x(0); | |
| 359 | |
| 360 gfx::Rect bounds(menu_position, lb.size()); | |
| 361 | |
| 362 dropdown_open_ = true; | |
| 363 if (dropdown_list_menu_runner_->RunMenuAt( | |
| 364 NULL, NULL, bounds, MenuItemView::TOPLEFT, | |
| 365 MenuRunner::HAS_MNEMONICS) == MenuRunner::MENU_DELETED) | |
| 366 return; | |
| 367 dropdown_open_ = false; | |
| 368 | |
| 369 // Need to explicitly clear mouse handler so that events get sent | |
| 370 // properly after the menu finishes running. If we don't do this, then | |
| 371 // the first click to other parts of the UI is eaten. | |
| 372 SetMouseHandler(NULL); | |
| 373 } | |
| 374 | |
| 375 //////////////////////////////////////////////////////////////////////////////// | |
| 376 // NativeComboboxWrapper, public: | |
| 377 | |
| 378 #if defined(USE_AURA) | |
| 379 // static | |
| 380 NativeComboboxWrapper* NativeComboboxWrapper::CreateWrapper( | |
| 381 Combobox* combobox) { | |
| 382 return new NativeComboboxViews(combobox); | |
| 383 } | |
| 384 #endif | |
| 385 | |
| 386 } // namespace views | |
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Chromium Code Reviews
Issue 8682011:
views: Move combobox directory to ui/views/controls/. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src