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| 1 // Copyright 2017 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 "box_layout_example.h" |
| 6 |
| 7 #include <vector> |
| 8 |
| 9 #include "base/memory/ptr_util.h" |
| 10 #include "base/strings/string16.h" |
| 11 #include "base/strings/string_number_conversions.h" |
| 12 #include "base/strings/utf_string_conversions.h" |
| 13 #include "third_party/skia/include/core/SkColor.h" |
| 14 #include "ui/base/models/combobox_model.h" |
| 15 #include "ui/gfx/geometry/insets.h" |
| 16 #include "ui/gfx/geometry/point.h" |
| 17 #include "ui/gfx/geometry/rect.h" |
| 18 #include "ui/views/border.h" |
| 19 #include "ui/views/controls/button/checkbox.h" |
| 20 #include "ui/views/controls/button/md_text_button.h" |
| 21 #include "ui/views/controls/combobox/combobox.h" |
| 22 #include "ui/views/controls/label.h" |
| 23 #include "ui/views/controls/textfield/textfield.h" |
| 24 #include "ui/views/examples/example_combobox_model.h" |
| 25 #include "ui/views/layout/fill_layout.h" |
| 26 #include "ui/views/view.h" |
| 27 #include "ui/views/view_properties.h" |
| 28 |
| 29 namespace views { |
| 30 namespace examples { |
| 31 |
| 32 namespace { |
| 33 |
| 34 // This View holds two other views which consists of a view on the left onto |
| 35 // which the BoxLayout is attached for demonstrating its features. The view |
| 36 // on the right contains all the various controls which allow the user to |
| 37 // interactively control the various features/properties of BoxLayout. Layout() |
| 38 // will ensure the left view takes 75% and the right view fills the remaining |
| 39 // 25%. |
| 40 class FullPanel : public View { |
| 41 public: |
| 42 FullPanel() {} |
| 43 ~FullPanel() override {} |
| 44 |
| 45 // View |
| 46 void Layout() override; |
| 47 |
| 48 private: |
| 49 DISALLOW_COPY_AND_ASSIGN(FullPanel); |
| 50 }; |
| 51 |
| 52 // This view is created and added to the left-side view in the FullPanel each |
| 53 // time the "Add" button is pressed. It also will display Textfield controls |
| 54 // when the mouse is pressed over the view. These Textfields allow the user to |
| 55 // interactively set each margin and the "flex" for the given view. |
| 56 class ChildPanel : public View, public TextfieldController { |
| 57 public: |
| 58 explicit ChildPanel(BoxLayoutExample* example, gfx::Size preferred_size); |
| 59 ~ChildPanel() override {} |
| 60 |
| 61 // View |
| 62 gfx::Size CalculatePreferredSize() const override; |
| 63 bool OnMousePressed(const ui::MouseEvent& event) override; |
| 64 void Layout() override; |
| 65 |
| 66 void SetSelected(bool value); |
| 67 bool selected() const { return selected_; }; |
| 68 |
| 69 int GetFlex(); |
| 70 |
| 71 private: |
| 72 // TextfieldController |
| 73 void ContentsChanged(Textfield* sender, |
| 74 const base::string16& new_contents) override; |
| 75 |
| 76 Textfield* CreateTextfield(); |
| 77 |
| 78 BoxLayoutExample* example_; |
| 79 bool selected_ = false; |
| 80 Textfield* flex_; |
| 81 Textfield* margin_[4]; |
| 82 gfx::Size preferred_size_; |
| 83 |
| 84 DISALLOW_COPY_AND_ASSIGN(ChildPanel); |
| 85 }; |
| 86 |
| 87 void FullPanel::Layout() { |
| 88 DCHECK_EQ(child_count(), 2); |
| 89 View* left_panel = child_at(0); |
| 90 View* right_panel = child_at(1); |
| 91 gfx::Rect bounds = GetContentsBounds(); |
| 92 left_panel->SetBounds(bounds.x(), bounds.y(), (bounds.width() * 75) / 100, |
| 93 bounds.height()); |
| 94 right_panel->SetBounds(left_panel->width(), bounds.y(), |
| 95 bounds.width() - left_panel->width(), bounds.height()); |
| 96 } |
| 97 |
| 98 ChildPanel::ChildPanel(BoxLayoutExample* example, gfx::Size preferred_size) |
| 99 : View(), example_(example), preferred_size_(preferred_size) { |
| 100 SetBorder(CreateSolidBorder(1, SK_ColorGRAY)); |
| 101 for (unsigned i = 0; i < sizeof(margin_) / sizeof(margin_[0]); ++i) |
| 102 margin_[i] = CreateTextfield(); |
| 103 flex_ = CreateTextfield(); |
| 104 flex_->SetText(base::ASCIIToUTF16("")); |
| 105 } |
| 106 |
| 107 gfx::Size ChildPanel::CalculatePreferredSize() const { |
| 108 return preferred_size_; |
| 109 } |
| 110 |
| 111 bool ChildPanel::OnMousePressed(const ui::MouseEvent& event) { |
| 112 if (event.IsOnlyLeftMouseButton()) |
| 113 SetSelected(true); |
| 114 return true; |
| 115 } |
| 116 |
| 117 void ChildPanel::Layout() { |
| 118 const int kSpacing = 2; |
| 119 if (selected_) { |
| 120 gfx::Rect client = GetContentsBounds(); |
| 121 for (unsigned i = 0; i < sizeof(margin_) / sizeof(margin_[0]); ++i) { |
| 122 gfx::Point pos; |
| 123 Textfield* textfield = margin_[i]; |
| 124 switch (i) { |
| 125 case 0: |
| 126 pos = gfx::Point((client.width() - textfield->width()) / 2, kSpacing); |
| 127 break; |
| 128 case 1: |
| 129 pos = |
| 130 gfx::Point(kSpacing, (client.height() - textfield->height()) / 2); |
| 131 break; |
| 132 case 2: |
| 133 pos = gfx::Point((client.width() - textfield->width()) / 2, |
| 134 client.height() - textfield->height() - kSpacing); |
| 135 break; |
| 136 case 3: |
| 137 pos = gfx::Point(client.width() - textfield->width() - kSpacing, |
| 138 (client.height() - textfield->height()) / 2); |
| 139 break; |
| 140 default: |
| 141 NOTREACHED(); |
| 142 } |
| 143 textfield->SetPosition(pos); |
| 144 } |
| 145 flex_->SetPosition(gfx::Point((client.width() - flex_->width()) / 2, |
| 146 (client.height() - flex_->height()) / 2)); |
| 147 } |
| 148 } |
| 149 |
| 150 void ChildPanel::SetSelected(bool value) { |
| 151 if (value != selected_) { |
| 152 selected_ = value; |
| 153 SetBorder(CreateSolidBorder(1, selected_ ? SK_ColorBLACK : SK_ColorGRAY)); |
| 154 if (selected_ && parent()) { |
| 155 for (int i = 0; i < parent()->child_count(); ++i) { |
| 156 View* child = parent()->child_at(i); |
| 157 if (child != this && child->GetGroup() == GetGroup()) { |
| 158 ChildPanel* child_panel = static_cast<ChildPanel*>(child); |
| 159 child_panel->SetSelected(false); |
| 160 } |
| 161 } |
| 162 } |
| 163 for (Textfield* textfield : margin_) |
| 164 textfield->SetVisible(selected_); |
| 165 flex_->SetVisible(selected_); |
| 166 InvalidateLayout(); |
| 167 example_->RefreshLayoutPanel(); |
| 168 } |
| 169 } |
| 170 |
| 171 int ChildPanel::GetFlex() { |
| 172 int flex; |
| 173 if (base::StringToInt(flex_->text(), &flex)) |
| 174 return flex; |
| 175 return -1; |
| 176 } |
| 177 |
| 178 void ChildPanel::ContentsChanged(Textfield* sender, |
| 179 const base::string16& new_contents) { |
| 180 int edges[4]; |
| 181 for (unsigned i = 0; i < sizeof(margin_) / sizeof(margin_[0]); ++i) { |
| 182 base::StringToInt(margin_[i]->text(), &edges[i]); |
| 183 } |
| 184 gfx::Insets margins = gfx::Insets(edges[0], edges[1], edges[2], edges[3]); |
| 185 if (!margins.IsEmpty()) |
| 186 this->SetProperty(kMarginsKey, new gfx::Insets(margins)); |
| 187 else |
| 188 this->ClearProperty(kMarginsKey); |
| 189 if (sender == flex_) |
| 190 example_->UpdateLayoutManager(); |
| 191 example_->RefreshLayoutPanel(); |
| 192 } |
| 193 |
| 194 Textfield* ChildPanel::CreateTextfield() { |
| 195 Textfield* textfield = new Textfield(); |
| 196 textfield->set_default_width_in_chars(3); |
| 197 textfield->SizeToPreferredSize(); |
| 198 textfield->SetText(base::ASCIIToUTF16("0")); |
| 199 textfield->set_controller(this); |
| 200 textfield->SetVisible(false); |
| 201 AddChildView(textfield); |
| 202 return textfield; |
| 203 } |
| 204 |
| 205 const int kSpacing = 3; |
| 206 const int kPadding = 8; |
| 207 const int kMaxPanels = 5; |
| 208 const int kChildPanelGroup = 100; |
| 209 const int kChildPanelWidth = 180; |
| 210 const int kChildPanelHeight = 90; |
| 211 const char* orientation_values[2] = {"Horizontal", "Vertical"}; |
| 212 const char* main_axis_values[3] = {"Start", "Center", "End"}; |
| 213 const char* cross_axis_values[4] = {"Stretch", "Start", "Center", "End"}; |
| 214 } |
| 215 |
| 216 BoxLayoutExample::BoxLayoutExample() : ExampleBase("Box Layout") {} |
| 217 |
| 218 BoxLayoutExample::~BoxLayoutExample() {} |
| 219 |
| 220 Combobox* BoxLayoutExample::CreateCombobox(const base::string16& label_text, |
| 221 const char** items, |
| 222 int count, |
| 223 int& vertical_pos) { |
| 224 Label* label = new Label(label_text); |
| 225 label->SetPosition(gfx::Point(kPadding, vertical_pos)); |
| 226 label->SizeToPreferredSize(); |
| 227 Combobox* combo_box = |
| 228 new Combobox(base::MakeUnique<ExampleComboboxModel>(items, count)); |
| 229 combo_box->SetPosition( |
| 230 gfx::Point(label->x() + label->width() + kSpacing, vertical_pos)); |
| 231 combo_box->SizeToPreferredSize(); |
| 232 combo_box->set_listener(this); |
| 233 label->SetSize(gfx::Size(label->width(), combo_box->height())); |
| 234 control_panel_->AddChildView(label); |
| 235 control_panel_->AddChildView(combo_box); |
| 236 vertical_pos += combo_box->height() + kSpacing; |
| 237 return combo_box; |
| 238 } |
| 239 |
| 240 Textfield* BoxLayoutExample::CreateRawTextfield(int& horizontal_pos, |
| 241 int vertical_pos, |
| 242 bool add) { |
| 243 Textfield* text_field = new Textfield(); |
| 244 text_field->SetPosition(gfx::Point(horizontal_pos, vertical_pos)); |
| 245 text_field->set_default_width_in_chars(3); |
| 246 text_field->SetTextInputType(ui::TEXT_INPUT_TYPE_NUMBER); |
| 247 text_field->SizeToPreferredSize(); |
| 248 text_field->SetText(base::ASCIIToUTF16("0")); |
| 249 text_field->set_controller(this); |
| 250 horizontal_pos += text_field->width() + kSpacing; |
| 251 if (add) |
| 252 control_panel_->AddChildView(text_field); |
| 253 return text_field; |
| 254 } |
| 255 |
| 256 Textfield* BoxLayoutExample::CreateTextfield(const base::string16& label_text, |
| 257 int& vertical_pos) { |
| 258 Label* label = new Label(label_text); |
| 259 label->SetPosition(gfx::Point(kPadding, vertical_pos)); |
| 260 label->SizeToPreferredSize(); |
| 261 int horizontal_pos = label->x() + label->width() + kSpacing; |
| 262 Textfield* text_field = |
| 263 CreateRawTextfield(horizontal_pos, vertical_pos, false); |
| 264 label->SetSize(gfx::Size(label->width(), text_field->height())); |
| 265 control_panel_->AddChildView(label); |
| 266 control_panel_->AddChildView(text_field); |
| 267 vertical_pos += text_field->height() + kSpacing; |
| 268 return text_field; |
| 269 } |
| 270 |
| 271 gfx::Size BoxLayoutExample::GetChildPanelSize() const { |
| 272 int width; |
| 273 int height; |
| 274 if (!base::StringToInt(child_panel_size_[0]->text(), &width)) |
| 275 width = kChildPanelWidth; |
| 276 if (!base::StringToInt(child_panel_size_[1]->text(), &height)) |
| 277 height = kChildPanelHeight; |
| 278 return gfx::Size(std::max(0, width), std::max(0, height)); |
| 279 } |
| 280 |
| 281 void BoxLayoutExample::CreateExampleView(View* container) { |
| 282 container->SetLayoutManager(new FillLayout()); |
| 283 full_panel_ = new FullPanel(); |
| 284 container->AddChildView(full_panel_); |
| 285 |
| 286 box_layout_panel_ = new View(); |
| 287 box_layout_panel_->SetBorder(CreateSolidBorder(1, SK_ColorLTGRAY)); |
| 288 full_panel_->AddChildView(box_layout_panel_); |
| 289 control_panel_ = new View(); |
| 290 full_panel_->AddChildView(control_panel_); |
| 291 |
| 292 int vertical_pos = kSpacing; |
| 293 int horizontal_pos = kPadding; |
| 294 add_button_ = |
| 295 MdTextButton::CreateSecondaryUiButton(this, base::ASCIIToUTF16("Add")); |
| 296 add_button_->SetPosition(gfx::Point(horizontal_pos, vertical_pos)); |
| 297 add_button_->SizeToPreferredSize(); |
| 298 control_panel_->AddChildView(add_button_); |
| 299 horizontal_pos += add_button_->width() + kSpacing; |
| 300 for (unsigned i = 0; |
| 301 i < sizeof(child_panel_size_) / sizeof(child_panel_size_[0]); ++i) { |
| 302 child_panel_size_[i] = |
| 303 CreateRawTextfield(horizontal_pos, vertical_pos, true); |
| 304 child_panel_size_[i]->SetY( |
| 305 vertical_pos + |
| 306 (add_button_->height() - child_panel_size_[i]->height()) / 2); |
| 307 } |
| 308 child_panel_size_[0]->SetText(base::IntToString16(kChildPanelWidth)); |
| 309 child_panel_size_[1]->SetText(base::IntToString16(kChildPanelHeight)); |
| 310 vertical_pos += add_button_->height() + kSpacing; |
| 311 |
| 312 orientation_ = CreateCombobox(base::ASCIIToUTF16("Orientation"), |
| 313 orientation_values, 2, vertical_pos); |
| 314 main_axis_alignment_ = CreateCombobox(base::ASCIIToUTF16("Main axis"), |
| 315 main_axis_values, 3, vertical_pos); |
| 316 cross_axis_alignment_ = CreateCombobox(base::ASCIIToUTF16("Cross axis"), |
| 317 cross_axis_values, 4, vertical_pos); |
| 318 |
| 319 between_child_spacing_ = |
| 320 CreateTextfield(base::ASCIIToUTF16("Child spacing"), vertical_pos); |
| 321 default_flex_ = |
| 322 CreateTextfield(base::ASCIIToUTF16("Default flex"), vertical_pos); |
| 323 min_cross_axis_size_ = |
| 324 CreateTextfield(base::ASCIIToUTF16("Min cross axis"), vertical_pos); |
| 325 |
| 326 border_insets_[0] = |
| 327 CreateTextfield(base::ASCIIToUTF16("Insets"), vertical_pos); |
| 328 horizontal_pos = |
| 329 border_insets_[0]->x() + border_insets_[0]->width() + kSpacing; |
| 330 for (unsigned i = 1; i < sizeof(border_insets_) / sizeof(border_insets_[0]); |
| 331 ++i) |
| 332 border_insets_[i] = |
| 333 CreateRawTextfield(horizontal_pos, border_insets_[0]->y(), true); |
| 334 |
| 335 collapse_margins_ = new Checkbox(base::ASCIIToUTF16("Collapse margins")); |
| 336 collapse_margins_->SetPosition(gfx::Point(kPadding, vertical_pos)); |
| 337 collapse_margins_->SizeToPreferredSize(); |
| 338 collapse_margins_->set_listener(this); |
| 339 control_panel_->AddChildView(collapse_margins_); |
| 340 |
| 341 UpdateLayoutManager(); |
| 342 } |
| 343 |
| 344 void BoxLayoutExample::ButtonPressed(Button* sender, const ui::Event& event) { |
| 345 if (sender == add_button_) { |
| 346 if (panel_count_ < kMaxPanels) { |
| 347 ++panel_count_; |
| 348 ChildPanel* panel = new ChildPanel(this, GetChildPanelSize()); |
| 349 panel->SetGroup(kChildPanelGroup); |
| 350 box_layout_panel_->AddChildView(panel); |
| 351 RefreshLayoutPanel(); |
| 352 } else { |
| 353 PrintStatus("Only %i panels may be added", kMaxPanels); |
| 354 } |
| 355 } else if (sender == collapse_margins_) { |
| 356 UpdateLayoutManager(); |
| 357 RefreshLayoutPanel(); |
| 358 } |
| 359 } |
| 360 |
| 361 void BoxLayoutExample::OnPerformAction(Combobox* combobox) { |
| 362 if (combobox == orientation_) { |
| 363 UpdateLayoutManager(); |
| 364 } else if (combobox == main_axis_alignment_) { |
| 365 layout_->set_main_axis_alignment(static_cast<BoxLayout::MainAxisAlignment>( |
| 366 main_axis_alignment_->selected_index())); |
| 367 } else if (combobox == cross_axis_alignment_) { |
| 368 layout_->set_cross_axis_alignment( |
| 369 static_cast<BoxLayout::CrossAxisAlignment>( |
| 370 cross_axis_alignment_->selected_index())); |
| 371 } |
| 372 RefreshLayoutPanel(); |
| 373 } |
| 374 |
| 375 void BoxLayoutExample::ContentsChanged(Textfield* textfield, |
| 376 const base::string16& new_contents) { |
| 377 if (textfield == between_child_spacing_) { |
| 378 UpdateLayoutManager(); |
| 379 } else if (textfield == default_flex_) { |
| 380 int default_flex; |
| 381 base::StringToInt(default_flex_->text(), &default_flex); |
| 382 layout_->SetDefaultFlex(default_flex); |
| 383 } else if (textfield == min_cross_axis_size_) { |
| 384 int min_cross_size; |
| 385 base::StringToInt(min_cross_axis_size_->text(), &min_cross_size); |
| 386 layout_->set_minimum_cross_axis_size(min_cross_size); |
| 387 } else if (textfield == border_insets_[0] || textfield == border_insets_[1] || |
| 388 textfield == border_insets_[2] || textfield == border_insets_[3]) { |
| 389 UpdateBorderInsets(); |
| 390 } |
| 391 RefreshLayoutPanel(); |
| 392 } |
| 393 |
| 394 void BoxLayoutExample::RefreshLayoutPanel() { |
| 395 box_layout_panel_->Layout(); |
| 396 box_layout_panel_->SchedulePaint(); |
| 397 } |
| 398 |
| 399 void BoxLayoutExample::UpdateBorderInsets() { |
| 400 int inset_values[4]; |
| 401 for (unsigned i = 0; i < sizeof(border_insets_) / sizeof(border_insets_[0]); |
| 402 ++i) |
| 403 base::StringToInt(border_insets_[i]->text(), &inset_values[i]); |
| 404 layout_->set_inside_border_insets(gfx::Insets( |
| 405 inset_values[0], inset_values[1], inset_values[2], inset_values[3])); |
| 406 } |
| 407 |
| 408 void BoxLayoutExample::UpdateLayoutManager() { |
| 409 int child_spacing; |
| 410 int default_flex; |
| 411 int min_cross_size; |
| 412 base::StringToInt(between_child_spacing_->text(), &child_spacing); |
| 413 base::StringToInt(default_flex_->text(), &default_flex); |
| 414 base::StringToInt(min_cross_axis_size_->text(), &min_cross_size); |
| 415 layout_ = new BoxLayout( |
| 416 orientation_->selected_index() == 0 ? BoxLayout::Orientation::kHorizontal |
| 417 : BoxLayout::Orientation::kVertical, |
| 418 gfx::Insets(0, 0), child_spacing, collapse_margins_->checked()); |
| 419 layout_->set_cross_axis_alignment(static_cast<BoxLayout::CrossAxisAlignment>( |
| 420 cross_axis_alignment_->selected_index())); |
| 421 layout_->set_main_axis_alignment(static_cast<BoxLayout::MainAxisAlignment>( |
| 422 main_axis_alignment_->selected_index())); |
| 423 layout_->SetDefaultFlex(default_flex); |
| 424 layout_->set_minimum_cross_axis_size(min_cross_size); |
| 425 UpdateBorderInsets(); |
| 426 box_layout_panel_->SetLayoutManager(layout_); |
| 427 for (int i = 0; i < box_layout_panel_->child_count(); ++i) { |
| 428 ChildPanel* panel = |
| 429 static_cast<ChildPanel*>(box_layout_panel_->child_at(i)); |
| 430 int flex = panel->GetFlex(); |
| 431 if (flex < 0) |
| 432 layout_->ClearFlexForView(panel); |
| 433 else |
| 434 layout_->SetFlexForView(panel, flex); |
| 435 } |
| 436 } |
| 437 |
| 438 } // namespace examples |
| 439 } // namespace views |
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