GItemView.cpp 8.7 KB

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  1. #include <Kernel/KeyCode.h>
  2. #include <LibGUI/GItemView.h>
  3. #include <LibGUI/GModel.h>
  4. #include <LibGUI/GPainter.h>
  5. #include <LibGUI/GScrollBar.h>
  6. GItemView::GItemView(GWidget* parent)
  7. : GAbstractView(parent)
  8. {
  9. set_frame_shape(FrameShape::Container);
  10. set_frame_shadow(FrameShadow::Sunken);
  11. set_frame_thickness(2);
  12. horizontal_scrollbar().set_visible(false);
  13. }
  14. GItemView::~GItemView()
  15. {
  16. }
  17. void GItemView::scroll_into_view(const GModelIndex& index, Orientation orientation)
  18. {
  19. GScrollableWidget::scroll_into_view(item_rect(index.row()), orientation);
  20. }
  21. void GItemView::resize_event(GResizeEvent& event)
  22. {
  23. GAbstractView::resize_event(event);
  24. update_content_size();
  25. }
  26. void GItemView::did_update_model()
  27. {
  28. GAbstractView::did_update_model();
  29. update_content_size();
  30. update();
  31. }
  32. void GItemView::update_content_size()
  33. {
  34. if (!model())
  35. return set_content_size({});
  36. m_visual_column_count = available_size().width() / effective_item_size().width();
  37. if (m_visual_column_count)
  38. m_visual_row_count = ceil_div(model()->row_count(), m_visual_column_count);
  39. else
  40. m_visual_row_count = 0;
  41. int content_width = available_size().width();
  42. int content_height = m_visual_row_count * effective_item_size().height();
  43. set_content_size({ content_width, content_height });
  44. }
  45. Rect GItemView::item_rect(int item_index) const
  46. {
  47. if (!m_visual_row_count || !m_visual_column_count)
  48. return {};
  49. int visual_row_index = item_index / m_visual_column_count;
  50. int visual_column_index = item_index % m_visual_column_count;
  51. return {
  52. visual_column_index * effective_item_size().width(),
  53. visual_row_index * effective_item_size().height(),
  54. effective_item_size().width(),
  55. effective_item_size().height()
  56. };
  57. }
  58. void GItemView::mousedown_event(GMouseEvent& event)
  59. {
  60. if (event.button() == GMouseButton::Left) {
  61. // FIXME: Since all items are the same size, just compute the clicked item index
  62. // instead of iterating over everything.
  63. auto adjusted_position = event.position().translated(0, vertical_scrollbar().value());
  64. for (int i = 0; i < item_count(); ++i) {
  65. if (item_rect(i).contains(adjusted_position)) {
  66. model()->set_selected_index(model()->index(i, 0));
  67. update();
  68. return;
  69. }
  70. }
  71. model()->set_selected_index({});
  72. update();
  73. }
  74. }
  75. void GItemView::doubleclick_event(GMouseEvent& event)
  76. {
  77. if (!model())
  78. return;
  79. if (event.button() == GMouseButton::Left) {
  80. mousedown_event(event);
  81. activate(model()->selected_index());
  82. }
  83. }
  84. void GItemView::paint_event(GPaintEvent& event)
  85. {
  86. GFrame::paint_event(event);
  87. GPainter painter(*this);
  88. painter.add_clip_rect(widget_inner_rect());
  89. painter.add_clip_rect(event.rect());
  90. painter.fill_rect(event.rect(), Color::White);
  91. painter.translate(-horizontal_scrollbar().value(), -vertical_scrollbar().value());
  92. auto column_metadata = model()->column_metadata(m_model_column);
  93. const Font& font = column_metadata.font ? *column_metadata.font : this->font();
  94. for (int item_index = 0; item_index < model()->row_count(); ++item_index) {
  95. bool is_selected_item = item_index == model()->selected_index().row();
  96. Color background_color;
  97. if (is_selected_item) {
  98. background_color = is_focused() ? Color::from_rgb(0x84351a) : Color::from_rgb(0x606060);
  99. } else {
  100. background_color = Color::White;
  101. }
  102. Rect item_rect = this->item_rect(item_index);
  103. auto model_index = model()->index(item_index, m_model_column);
  104. auto icon = model()->data(model_index, GModel::Role::Icon);
  105. auto item_text = model()->data(model_index, GModel::Role::Display);
  106. Rect icon_rect = { 0, 0, 32, 32 };
  107. icon_rect.center_within(item_rect);
  108. icon_rect.move_by(0, -font.glyph_height() - 6);
  109. if (icon.is_icon()) {
  110. if (auto bitmap = icon.as_icon().bitmap_for_size(icon_rect.width()))
  111. painter.draw_scaled_bitmap(icon_rect, *bitmap, bitmap->rect());
  112. }
  113. Rect text_rect { 0, icon_rect.bottom() + 6 + 1, font.width(item_text.to_string()), font.glyph_height() };
  114. text_rect.center_horizontally_within(item_rect);
  115. text_rect.inflate(6, 4);
  116. Color text_color;
  117. if (is_selected_item)
  118. text_color = Color::White;
  119. else
  120. text_color = model()->data(model_index, GModel::Role::ForegroundColor).to_color(Color::Black);
  121. painter.fill_rect(text_rect, background_color);
  122. painter.draw_text(text_rect, item_text.to_string(), font, TextAlignment::Center, text_color);
  123. };
  124. }
  125. int GItemView::item_count() const
  126. {
  127. if (!model())
  128. return 0;
  129. return model()->row_count();
  130. }
  131. void GItemView::keydown_event(GKeyEvent& event)
  132. {
  133. if (!model())
  134. return;
  135. if (!m_visual_row_count || !m_visual_column_count)
  136. return;
  137. auto& model = *this->model();
  138. if (event.key() == KeyCode::Key_Return) {
  139. activate(model.selected_index());
  140. return;
  141. }
  142. if (event.key() == KeyCode::Key_Home) {
  143. auto new_index = model.index(0, 0);
  144. if (model.is_valid(new_index)) {
  145. model.set_selected_index(new_index);
  146. scroll_into_view(new_index, Orientation::Vertical);
  147. update();
  148. }
  149. return;
  150. }
  151. if (event.key() == KeyCode::Key_End) {
  152. auto new_index = model.index(model.row_count() - 1, 0);
  153. if (model.is_valid(new_index)) {
  154. model.set_selected_index(new_index);
  155. scroll_into_view(new_index, Orientation::Vertical);
  156. update();
  157. }
  158. return;
  159. }
  160. if (event.key() == KeyCode::Key_Up) {
  161. GModelIndex new_index;
  162. if (model.selected_index().is_valid())
  163. new_index = model.index(model.selected_index().row() - m_visual_column_count, model.selected_index().column());
  164. else
  165. new_index = model.index(0, 0);
  166. if (model.is_valid(new_index)) {
  167. model.set_selected_index(new_index);
  168. scroll_into_view(new_index, Orientation::Vertical);
  169. update();
  170. }
  171. return;
  172. }
  173. if (event.key() == KeyCode::Key_Down) {
  174. GModelIndex new_index;
  175. if (model.selected_index().is_valid())
  176. new_index = model.index(model.selected_index().row() + m_visual_column_count, model.selected_index().column());
  177. else
  178. new_index = model.index(0, 0);
  179. if (model.is_valid(new_index)) {
  180. model.set_selected_index(new_index);
  181. scroll_into_view(new_index, Orientation::Vertical);
  182. update();
  183. }
  184. return;
  185. }
  186. if (event.key() == KeyCode::Key_Left) {
  187. GModelIndex new_index;
  188. if (model.selected_index().is_valid())
  189. new_index = model.index(model.selected_index().row() - 1, model.selected_index().column());
  190. else
  191. new_index = model.index(0, 0);
  192. if (model.is_valid(new_index)) {
  193. model.set_selected_index(new_index);
  194. scroll_into_view(new_index, Orientation::Vertical);
  195. update();
  196. }
  197. return;
  198. }
  199. if (event.key() == KeyCode::Key_Right) {
  200. GModelIndex new_index;
  201. if (model.selected_index().is_valid())
  202. new_index = model.index(model.selected_index().row() + 1, model.selected_index().column());
  203. else
  204. new_index = model.index(0, 0);
  205. if (model.is_valid(new_index)) {
  206. model.set_selected_index(new_index);
  207. scroll_into_view(new_index, Orientation::Vertical);
  208. update();
  209. }
  210. return;
  211. }
  212. if (event.key() == KeyCode::Key_PageUp) {
  213. int items_per_page = (visible_content_rect().height() / effective_item_size().height()) * m_visual_column_count;
  214. auto new_index = model.index(max(0, model.selected_index().row() - items_per_page), model.selected_index().column());
  215. if (model.is_valid(new_index)) {
  216. model.set_selected_index(new_index);
  217. scroll_into_view(new_index, Orientation::Vertical);
  218. update();
  219. }
  220. return;
  221. }
  222. if (event.key() == KeyCode::Key_PageDown) {
  223. int items_per_page = (visible_content_rect().height() / effective_item_size().height()) * m_visual_column_count;
  224. auto new_index = model.index(min(model.row_count() - 1, model.selected_index().row() + items_per_page), model.selected_index().column());
  225. if (model.is_valid(new_index)) {
  226. model.set_selected_index(new_index);
  227. scroll_into_view(new_index, Orientation::Vertical);
  228. update();
  229. }
  230. return;
  231. }
  232. return GWidget::keydown_event(event);
  233. }