src/dolphiniconsview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006-2009 by Peter Penz <peter.penz@gmx.at>             *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "dolphiniconsview.h"
  21
  22 #include "dolphincategorydrawer.h"
  23 #include "dolphincontroller.h"
  24 #include "settings/dolphinsettings.h"
  25 #include "dolphinsortfilterproxymodel.h"
  26 #include "dolphin_iconsmodesettings.h"
  27 #include "dolphin_generalsettings.h"
  28 #include "draganddrophelper.h"
  29 #include "selectionmanager.h"
  30 #include "viewextensionsfactory.h"
  31 #include "zoomlevelinfo.h"
  32
  33 #include <kcategorizedsortfilterproxymodel.h>
  34 #include <kdialog.h>
  35 #include <kfileitemdelegate.h>
  36
  37 #include <QAbstractProxyModel>
  38 #include <QApplication>
  39 #include <QScrollBar>
  40
  41 DolphinIconsView::DolphinIconsView(QWidget* parent,
  42                                    DolphinController* controller,
  43                                    DolphinSortFilterProxyModel* proxyModel) :
  44     KCategorizedView(parent),
  45     m_controller(controller),
  46     m_categoryDrawer(0),
  47     m_extensionsFactory(0),
  48     m_font(),
  49     m_decorationSize(),
  50     m_decorationPosition(QStyleOptionViewItem::Top),
  51     m_displayAlignment(Qt::AlignHCenter),
  52     m_itemSize(),
  53     m_dropRect()
  54 {
  55     Q_ASSERT(controller != 0);
  56     setModel(proxyModel);
  57     setLayoutDirection(Qt::LeftToRight);
  58     setViewMode(QListView::IconMode);
  59     setResizeMode(QListView::Adjust);
  60     setMovement(QListView::Static);
  61     setDragEnabled(true);
  62     setEditTriggers(QAbstractItemView::NoEditTriggers);
  63     viewport()->setAcceptDrops(true);
  64
  65     setMouseTracking(true);
  66
  67     connect(this, SIGNAL(clicked(const QModelIndex&)),
  68             controller, SLOT(requestTab(const QModelIndex&)));
  69     if (KGlobalSettings::singleClick()) {
  70         connect(this, SIGNAL(clicked(const QModelIndex&)),
  71                 controller, SLOT(triggerItem(const QModelIndex&)));
  72     } else {
  73         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  74                 controller, SLOT(triggerItem(const QModelIndex&)));
  75     }
  76
  77     connect(this, SIGNAL(entered(const QModelIndex&)),
  78             controller, SLOT(emitItemEntered(const QModelIndex&)));
  79     connect(this, SIGNAL(viewportEntered()),
  80             controller, SLOT(emitViewportEntered()));
  81     connect(controller, SIGNAL(zoomLevelChanged(int)),
  82             this, SLOT(setZoomLevel(int)));
  83
  84     const DolphinView* view = controller->dolphinView();
  85     connect(view, SIGNAL(showPreviewChanged()),
  86             this, SLOT(slotShowPreviewChanged()));
  87     connect(view, SIGNAL(additionalInfoChanged()),
  88             this, SLOT(slotAdditionalInfoChanged()));
  89
  90     // apply the icons mode settings to the widget
  91     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  92     Q_ASSERT(settings != 0);
  93
  94     if (settings->useSystemFont()) {
  95         m_font = KGlobalSettings::generalFont();
  96     } else {
  97         m_font = QFont(settings->fontFamily(),
  98                        settings->fontSize(),
  99                        settings->fontWeight(),
 100                        settings->italicFont());
 101     }
 102
 103     setWordWrap(settings->numberOfTextlines() > 1);
 104
 105     if (settings->arrangement() == QListView::TopToBottom) {
 106         setFlow(QListView::LeftToRight);
 107         m_decorationPosition = QStyleOptionViewItem::Top;
 108         m_displayAlignment = Qt::AlignHCenter;
 109     } else {
 110         setFlow(QListView::TopToBottom);
 111         m_decorationPosition = QStyleOptionViewItem::Left;
 112         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 113     }
 114
 115     m_categoryDrawer = new DolphinCategoryDrawer();
 116     setCategoryDrawer(m_categoryDrawer);
 117
 118     setFocus();
 119
 120     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 121             this, SLOT(slotGlobalSettingsChanged(int)));
 122
 123     updateGridSize(view->showPreview(), 0);
 124     m_extensionsFactory = new ViewExtensionsFactory(this, controller);
 125 }
 126
 127 DolphinIconsView::~DolphinIconsView()
 128 {
 129     delete m_categoryDrawer;
 130     m_categoryDrawer = 0;
 131 }
 132
 133 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 134 {
 135     KCategorizedView::dataChanged(topLeft, bottomRight);
 136
 137     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 138     if (!proxyModel->isCategorizedModel()) {
 139         // bypass a QListView issue that items are not layout correctly if the decoration size of
 140         // an index changes
 141         scheduleDelayedItemsLayout();
 142     }
 143 }
 144
 145 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 146 {
 147     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 148     viewOptions.font = m_font;
 149     viewOptions.fontMetrics = QFontMetrics(m_font);
 150     viewOptions.decorationPosition = m_decorationPosition;
 151     viewOptions.decorationSize = m_decorationSize;
 152     viewOptions.displayAlignment = m_displayAlignment;
 153     viewOptions.showDecorationSelected = true;
 154     return viewOptions;
 155 }
 156
 157 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 158 {
 159     KCategorizedView::contextMenuEvent(event);
 160     m_controller->triggerContextMenuRequest(event->pos());
 161 }
 162
 163 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 164 {
 165     m_controller->requestActivation();
 166     const QModelIndex index = indexAt(event->pos());
 167     if (index.isValid() && (event->button() == Qt::LeftButton)) {
 168         // TODO: It should not be necessary to manually set the dragging state, but I could
 169         // not reproduce this issue with a Qt-only example yet to find the root cause.
 170         // Issue description: start Dolphin, split the view and drag an item from the
 171         // inactive view to the active view by a very fast mouse movement. Result:
 172         // the item gets selected instead of being dragged...
 173         setState(QAbstractItemView::DraggingState);
 174     }
 175
 176     if (!index.isValid()) {
 177         if (QApplication::mouseButtons() & Qt::MidButton) {
 178             m_controller->replaceUrlByClipboard();
 179         }
 180         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 181         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 182             clearSelection();
 183         }
 184     }
 185
 186     KCategorizedView::mousePressEvent(event);
 187 }
 188
 189 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 190 {
 191     DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 192 }
 193
 194 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 195 {
 196     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 197         event->acceptProposedAction();
 198     }
 199 }
 200
 201 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 202 {
 203     KCategorizedView::dragLeaveEvent(event);
 204     setDirtyRegion(m_dropRect);
 205 }
 206
 207 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 208 {
 209     KCategorizedView::dragMoveEvent(event);
 210
 211     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 212     const QModelIndex index = indexAt(event->pos());
 213     setDirtyRegion(m_dropRect);
 214
 215     m_dropRect.setSize(QSize()); // set as invalid
 216     if (index.isValid()) {
 217         const KFileItem item = m_controller->itemForIndex(index);
 218         if (!item.isNull() && item.isDir()) {
 219             m_dropRect = visualRect(index);
 220         } else {
 221             m_dropRect.setSize(QSize()); // set as invalid
 222         }
 223     }
 224     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 225         // accept url drops, independently from the destination item
 226         event->acceptProposedAction();
 227     }
 228
 229     setDirtyRegion(m_dropRect);
 230 }
 231
 232 void DolphinIconsView::dropEvent(QDropEvent* event)
 233 {
 234     const QModelIndex index = indexAt(event->pos());
 235     const KFileItem item = m_controller->itemForIndex(index);
 236     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 237     // don't call KCategorizedView::dropEvent(event), as it moves
 238     // the items which is not wanted
 239 }
 240
 241 QModelIndex DolphinIconsView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 242 {
 243     const QModelIndex oldCurrent = currentIndex();
 244
 245     QModelIndex newCurrent = KCategorizedView::moveCursor(cursorAction, modifiers);
 246     if (newCurrent != oldCurrent) {
 247         return newCurrent;
 248     }
 249
 250     // The cursor has not been moved by the base implementation. Provide a
 251     // wrap behavior, so that the cursor will go to the next item when reaching
 252     // the border.
 253     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 254     if (settings->arrangement() == QListView::LeftToRight) {
 255         switch (cursorAction) {
 256         case MoveUp:
 257             if (newCurrent.row() == 0) {
 258                 return newCurrent;
 259             }
 260             newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 261             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 262             newCurrent = KCategorizedView::moveCursor(MovePageDown, modifiers);
 263             break;
 264
 265         case MoveDown:
 266             if (newCurrent.row() == (model()->rowCount() - 1)) {
 267                 return newCurrent;
 268             }
 269             newCurrent = KCategorizedView::moveCursor(MovePageUp, modifiers);
 270             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 271             newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 272             break;
 273
 274         default:
 275             break;
 276         }
 277     } else {
 278         QModelIndex current = oldCurrent;
 279         switch (cursorAction) {
 280         case MoveLeft:
 281             if (newCurrent.row() == 0) {
 282                 return newCurrent;
 283             }
 284             newCurrent = KCategorizedView::moveCursor(MoveUp, modifiers);
 285             do {
 286                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 287                 current = newCurrent;
 288                 newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 289             } while (newCurrent != current);
 290             break;
 291
 292         case MoveRight:
 293             if (newCurrent.row() == (model()->rowCount() - 1)) {
 294                 return newCurrent;
 295             }
 296             do {
 297                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 298                 current = newCurrent;
 299                 newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 300             } while (newCurrent != current);
 301             newCurrent = KCategorizedView::moveCursor(MoveDown, modifiers);
 302             break;
 303
 304         default:
 305             break;
 306         }
 307     }
 308
 309     // Revert all changes of the current item to make sure that item selection works correctly
 310     selectionModel()->setCurrentIndex(oldCurrent, QItemSelectionModel::NoUpdate);
 311     return newCurrent;
 312 }
 313
 314 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 315 {
 316     KCategorizedView::keyPressEvent(event);
 317     m_controller->handleKeyPressEvent(event);
 318 }
 319
 320 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 321 {
 322     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 10);
 323     verticalScrollBar()->setSingleStep(m_itemSize.height() / 10);
 324
 325     KCategorizedView::wheelEvent(event);
 326     // if the icons are aligned left to right, the vertical wheel event should
 327     // be applied to the horizontal scrollbar
 328     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 329     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 330                                   (settings->arrangement() == QListView::LeftToRight);
 331     if (scrollHorizontal) {
 332         QWheelEvent horizEvent(event->pos(),
 333                                event->delta(),
 334                                event->buttons(),
 335                                event->modifiers(),
 336                                Qt::Horizontal);
 337         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 338     }
 339 }
 340
 341 void DolphinIconsView::showEvent(QShowEvent* event)
 342 {
 343     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 344     delegate->setMaximumSize(m_itemSize);
 345
 346     KCategorizedView::showEvent(event);
 347 }
 348
 349 void DolphinIconsView::leaveEvent(QEvent* event)
 350 {
 351     KCategorizedView::leaveEvent(event);
 352     // if the mouse is above an item and moved very fast outside the widget,
 353     // no viewportEntered() signal might be emitted although the mouse has been moved
 354     // above the viewport
 355     m_controller->emitViewportEntered();
 356 }
 357
 358 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 359 {
 360     KCategorizedView::currentChanged(current, previous);
 361     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 362 }
 363
 364 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 365 {
 366     KCategorizedView::resizeEvent(event);
 367     const DolphinView* view = m_controller->dolphinView();
 368     updateGridSize(view->showPreview(), view->additionalInfo().count());
 369 }
 370
 371 void DolphinIconsView::slotShowPreviewChanged()
 372 {
 373     const DolphinView* view = m_controller->dolphinView();
 374     updateGridSize(view->showPreview(), additionalInfoCount());
 375 }
 376
 377 void DolphinIconsView::slotAdditionalInfoChanged()
 378 {
 379     const DolphinView* view = m_controller->dolphinView();
 380     const bool showPreview = view->showPreview();
 381     updateGridSize(showPreview, view->additionalInfo().count());
 382 }
 383
 384 void DolphinIconsView::setZoomLevel(int level)
 385 {
 386     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 387
 388     const int oldIconSize = settings->iconSize();
 389     int newIconSize = oldIconSize;
 390
 391     const bool showPreview = m_controller->dolphinView()->showPreview();
 392     if (showPreview) {
 393         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 394         settings->setPreviewSize(previewSize);
 395     } else {
 396         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 397         settings->setIconSize(newIconSize);
 398     }
 399
 400     // increase also the grid size
 401     const int diff = newIconSize - oldIconSize;
 402     settings->setItemWidth(settings->itemWidth() + diff);
 403     settings->setItemHeight(settings->itemHeight() + diff);
 404
 405     updateGridSize(showPreview, additionalInfoCount());
 406 }
 407
 408 void DolphinIconsView::requestActivation()
 409 {
 410     m_controller->requestActivation();
 411 }
 412
 413 void DolphinIconsView::slotGlobalSettingsChanged(int category)
 414 {
 415     Q_UNUSED(category);
 416
 417     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 418     Q_ASSERT(settings != 0);
 419     if (settings->useSystemFont()) {
 420         m_font = KGlobalSettings::generalFont();
 421     }
 422
 423     disconnect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 424     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 425     if (KGlobalSettings::singleClick()) {
 426         connect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 427     } else {
 428         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 429     }
 430 }
 431
 432 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 433 {
 434     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 435     Q_ASSERT(settings != 0);
 436
 437     int itemWidth = settings->itemWidth();
 438     int itemHeight = settings->itemHeight();
 439     int size = settings->iconSize();
 440
 441     if (showPreview) {
 442         const int previewSize = settings->previewSize();
 443         const int diff = previewSize - size;
 444         itemWidth  += diff;
 445         itemHeight += diff;
 446
 447         size = previewSize;
 448     }
 449
 450     Q_ASSERT(additionalInfoCount >= 0);
 451     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 452
 453     // Optimize the item size of the grid in a way to prevent large gaps on the
 454     // right border (= row arrangement) or the bottom border (= column arrangement).
 455     // There is no public API in QListView to find out the used width of the viewport
 456     // for the layout. The following calculation of 'contentWidth'/'contentHeight'
 457     // is based on QListViewPrivate::prepareItemsLayout() (Copyright (C) 2009 Nokia Corporation).
 458     int frameAroundContents = 0;
 459     if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 460         frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
 461     }
 462     const int spacing = settings->gridSpacing();
 463     if (settings->arrangement() == QListView::TopToBottom) {
 464         const int contentWidth = viewport()->width() - 1
 465                                  - frameAroundContents
 466                                  - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, horizontalScrollBar());
 467         const int gridWidth = itemWidth + spacing * 2;
 468         const int horizItemCount = contentWidth / gridWidth;
 469         if (horizItemCount > 0) {
 470             itemWidth += (contentWidth - horizItemCount * gridWidth) / horizItemCount;
 471         }
 472
 473         // The decoration width indirectly defines the maximum
 474         // width for the text wrapping. To use the maximum item width
 475         // for text wrapping, it is used as decoration width.
 476         m_decorationSize = QSize(itemWidth, size);
 477         setIconSize(QSize(itemWidth, size));
 478     } else {
 479         const int contentHeight = viewport()->height() - 1
 480                                   - frameAroundContents
 481                                   - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 482         const int gridHeight = itemHeight + spacing;
 483         const int vertItemCount = contentHeight / gridHeight;
 484         if (vertItemCount > 0) {
 485             itemHeight += (contentHeight - vertItemCount * gridHeight) / vertItemCount;
 486         }
 487
 488         m_decorationSize = QSize(size, size);
 489         setIconSize(QSize(size, size));
 490     }
 491
 492     m_itemSize = QSize(itemWidth, itemHeight);
 493     setGridSizeOwn(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 494
 495     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 496     if (delegate != 0) {
 497         delegate->setMaximumSize(m_itemSize);
 498     }
 499 }
 500
 501 int DolphinIconsView::additionalInfoCount() const
 502 {
 503     const DolphinView* view = m_controller->dolphinView();
 504     return view->additionalInfo().count();
 505 }
 506
 507 #include "dolphiniconsview.moc"