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() && (QApplication::mouseButtons() & Qt::MidButton)) {
 177          m_controller->replaceUrlByClipboard();
 178     }
 179
 180     KCategorizedView::mousePressEvent(event);
 181 }
 182
 183 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 184 {
 185     DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 186 }
 187
 188 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 189 {
 190     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 191         event->acceptProposedAction();
 192     }
 193 }
 194
 195 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 196 {
 197     KCategorizedView::dragLeaveEvent(event);
 198     setDirtyRegion(m_dropRect);
 199 }
 200
 201 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 202 {
 203     KCategorizedView::dragMoveEvent(event);
 204
 205     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 206     const QModelIndex index = indexAt(event->pos());
 207     setDirtyRegion(m_dropRect);
 208
 209     m_dropRect.setSize(QSize()); // set as invalid
 210     if (index.isValid()) {
 211         const KFileItem item = m_controller->itemForIndex(index);
 212         if (!item.isNull() && item.isDir()) {
 213             m_dropRect = visualRect(index);
 214         } else {
 215             m_dropRect.setSize(QSize()); // set as invalid
 216         }
 217     }
 218     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 219         // accept url drops, independently from the destination item
 220         event->acceptProposedAction();
 221     }
 222
 223     setDirtyRegion(m_dropRect);
 224 }
 225
 226 void DolphinIconsView::dropEvent(QDropEvent* event)
 227 {
 228     const QModelIndex index = indexAt(event->pos());
 229     const KFileItem item = m_controller->itemForIndex(index);
 230     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 231     // don't call KCategorizedView::dropEvent(event), as it moves
 232     // the items which is not wanted
 233 }
 234
 235 QModelIndex DolphinIconsView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 236 {
 237     const QModelIndex oldCurrent = currentIndex();
 238
 239     QModelIndex newCurrent = KCategorizedView::moveCursor(cursorAction, modifiers);
 240     if (newCurrent != oldCurrent) {
 241         return newCurrent;
 242     }
 243
 244     // The cursor has not been moved by the base implementation. Provide a
 245     // wrap behavior, so that the cursor will go to the next item when reaching
 246     // the border.
 247     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 248     if (settings->arrangement() == QListView::LeftToRight) {
 249         switch (cursorAction) {
 250         case MoveUp:
 251             if (newCurrent.row() == 0) {
 252                 return newCurrent;
 253             }
 254             newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 255             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 256             newCurrent = KCategorizedView::moveCursor(MovePageDown, modifiers);
 257             break;
 258
 259         case MoveDown:
 260             if (newCurrent.row() == (model()->rowCount() - 1)) {
 261                 return newCurrent;
 262             }
 263             newCurrent = KCategorizedView::moveCursor(MovePageUp, modifiers);
 264             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 265             newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 266             break;
 267
 268         default:
 269             break;
 270         }
 271     } else {
 272         QModelIndex current = oldCurrent;
 273         switch (cursorAction) {
 274         case MoveLeft:
 275             if (newCurrent.row() == 0) {
 276                 return newCurrent;
 277             }
 278             newCurrent = KCategorizedView::moveCursor(MoveUp, modifiers);
 279             do {
 280                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 281                 current = newCurrent;
 282                 newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 283             } while (newCurrent != current);
 284             break;
 285
 286         case MoveRight:
 287             if (newCurrent.row() == (model()->rowCount() - 1)) {
 288                 return newCurrent;
 289             }
 290             do {
 291                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 292                 current = newCurrent;
 293                 newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 294             } while (newCurrent != current);
 295             newCurrent = KCategorizedView::moveCursor(MoveDown, modifiers);
 296             break;
 297
 298         default:
 299             break;
 300         }
 301     }
 302
 303     // Revert all changes of the current item to make sure that item selection works correctly
 304     selectionModel()->setCurrentIndex(oldCurrent, QItemSelectionModel::NoUpdate);
 305     return newCurrent;
 306 }
 307
 308 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 309 {
 310     KCategorizedView::keyPressEvent(event);
 311     m_controller->handleKeyPressEvent(event);
 312 }
 313
 314 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 315 {
 316     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 5);
 317     verticalScrollBar()->setSingleStep(m_itemSize.height() / 5);
 318
 319     KCategorizedView::wheelEvent(event);
 320     // if the icons are aligned left to right, the vertical wheel event should
 321     // be applied to the horizontal scrollbar
 322     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 323     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 324                                   (settings->arrangement() == QListView::LeftToRight);
 325     if (scrollHorizontal) {
 326         QWheelEvent horizEvent(event->pos(),
 327                                event->delta(),
 328                                event->buttons(),
 329                                event->modifiers(),
 330                                Qt::Horizontal);
 331         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 332     }
 333 }
 334
 335 void DolphinIconsView::showEvent(QShowEvent* event)
 336 {
 337     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 338     delegate->setMaximumSize(m_itemSize);
 339
 340     KCategorizedView::showEvent(event);
 341 }
 342
 343 void DolphinIconsView::leaveEvent(QEvent* event)
 344 {
 345     KCategorizedView::leaveEvent(event);
 346     // if the mouse is above an item and moved very fast outside the widget,
 347     // no viewportEntered() signal might be emitted although the mouse has been moved
 348     // above the viewport
 349     m_controller->emitViewportEntered();
 350 }
 351
 352 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 353 {
 354     KCategorizedView::currentChanged(current, previous);
 355     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 356 }
 357
 358 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 359 {
 360     KCategorizedView::resizeEvent(event);
 361     const DolphinView* view = m_controller->dolphinView();
 362     updateGridSize(view->showPreview(), view->additionalInfo().count());
 363 }
 364
 365 void DolphinIconsView::slotShowPreviewChanged()
 366 {
 367     const DolphinView* view = m_controller->dolphinView();
 368     updateGridSize(view->showPreview(), additionalInfoCount());
 369 }
 370
 371 void DolphinIconsView::slotAdditionalInfoChanged()
 372 {
 373     const DolphinView* view = m_controller->dolphinView();
 374     const bool showPreview = view->showPreview();
 375     updateGridSize(showPreview, view->additionalInfo().count());
 376 }
 377
 378 void DolphinIconsView::setZoomLevel(int level)
 379 {
 380     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 381
 382     const int oldIconSize = settings->iconSize();
 383     int newIconSize = oldIconSize;
 384
 385     const bool showPreview = m_controller->dolphinView()->showPreview();
 386     if (showPreview) {
 387         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 388         settings->setPreviewSize(previewSize);
 389     } else {
 390         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 391         settings->setIconSize(newIconSize);
 392     }
 393
 394     // increase also the grid size
 395     const int diff = newIconSize - oldIconSize;
 396     settings->setItemWidth(settings->itemWidth() + diff);
 397     settings->setItemHeight(settings->itemHeight() + diff);
 398
 399     updateGridSize(showPreview, additionalInfoCount());
 400 }
 401
 402 void DolphinIconsView::requestActivation()
 403 {
 404     m_controller->requestActivation();
 405 }
 406
 407 void DolphinIconsView::slotGlobalSettingsChanged(int category)
 408 {
 409     Q_UNUSED(category);
 410
 411     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 412     Q_ASSERT(settings != 0);
 413     if (settings->useSystemFont()) {
 414         m_font = KGlobalSettings::generalFont();
 415     }
 416
 417     disconnect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 418     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 419     if (KGlobalSettings::singleClick()) {
 420         connect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 421     } else {
 422         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 423     }
 424 }
 425
 426 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 427 {
 428     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 429     Q_ASSERT(settings != 0);
 430
 431     int itemWidth = settings->itemWidth();
 432     int itemHeight = settings->itemHeight();
 433     int size = settings->iconSize();
 434
 435     if (showPreview) {
 436         const int previewSize = settings->previewSize();
 437         const int diff = previewSize - size;
 438         itemWidth  += diff;
 439         itemHeight += diff;
 440
 441         size = previewSize;
 442     }
 443
 444     Q_ASSERT(additionalInfoCount >= 0);
 445     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 446
 447     // Optimize the item size of the grid in a way to prevent large gaps on the
 448     // right border (= row arrangement) or the bottom border (= column arrangement).
 449     // There is no public API in QListView to find out the used width of the viewport
 450     // for the layout. The following calculation of 'contentWidth'/'contentHeight'
 451     // is based on QListViewPrivate::prepareItemsLayout() (Copyright (C) 2009 Nokia Corporation).
 452     int frameAroundContents = 0;
 453     if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 454         frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
 455     }
 456     const int spacing = settings->gridSpacing();
 457     if (settings->arrangement() == QListView::TopToBottom) {
 458         const int contentWidth = viewport()->width() - 1
 459                                  - frameAroundContents
 460                                  - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, horizontalScrollBar());
 461         const int gridWidth = itemWidth + spacing * 2;
 462         const int horizItemCount = contentWidth / gridWidth;
 463         if (horizItemCount > 0) {
 464             itemWidth += (contentWidth - horizItemCount * gridWidth) / horizItemCount;
 465         }
 466
 467         // The decoration width indirectly defines the maximum
 468         // width for the text wrapping. To use the maximum item width
 469         // for text wrapping, it is used as decoration width.
 470         m_decorationSize = QSize(itemWidth, size);
 471         setIconSize(QSize(itemWidth, size));
 472     } else {
 473         const int contentHeight = viewport()->height() - 1
 474                                   - frameAroundContents
 475                                   - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 476         const int gridHeight = itemHeight + spacing;
 477         const int vertItemCount = contentHeight / gridHeight;
 478         if (vertItemCount > 0) {
 479             itemHeight += (contentHeight - vertItemCount * gridHeight) / vertItemCount;
 480         }
 481
 482         m_decorationSize = QSize(size, size);
 483         setIconSize(QSize(size, size));
 484     }
 485
 486     m_itemSize = QSize(itemWidth, itemHeight);
 487     setGridSizeOwn(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 488
 489     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 490     if (delegate != 0) {
 491         delegate->setMaximumSize(m_itemSize);
 492     }
 493 }
 494
 495 int DolphinIconsView::additionalInfoCount() const
 496 {
 497     const DolphinView* view = m_controller->dolphinView();
 498     return view->additionalInfo().count();
 499 }
 500
 501 #include "dolphiniconsview.moc"