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(nameFilterChanged(const QString&)),
  82             this, SLOT(setNameFilter(const QString&)));
  83     connect(controller, SIGNAL(zoomLevelChanged(int)),
  84             this, SLOT(setZoomLevel(int)));
  85
  86     const DolphinView* view = controller->dolphinView();
  87     connect(view, SIGNAL(showPreviewChanged()),
  88             this, SLOT(slotShowPreviewChanged()));
  89     connect(view, SIGNAL(additionalInfoChanged()),
  90             this, SLOT(slotAdditionalInfoChanged()));
  91
  92     // apply the icons mode settings to the widget
  93     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  94     Q_ASSERT(settings != 0);
  95
  96     if (settings->useSystemFont()) {
  97         m_font = KGlobalSettings::generalFont();
  98     } else {
  99         m_font = QFont(settings->fontFamily(),
 100                        settings->fontSize(),
 101                        settings->fontWeight(),
 102                        settings->italicFont());
 103     }
 104
 105     setWordWrap(settings->numberOfTextlines() > 1);
 106
 107     if (settings->arrangement() == QListView::TopToBottom) {
 108         setFlow(QListView::LeftToRight);
 109         m_decorationPosition = QStyleOptionViewItem::Top;
 110         m_displayAlignment = Qt::AlignHCenter;
 111     } else {
 112         setFlow(QListView::TopToBottom);
 113         m_decorationPosition = QStyleOptionViewItem::Left;
 114         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 115     }
 116
 117     m_categoryDrawer = new DolphinCategoryDrawer();
 118     setCategoryDrawer(m_categoryDrawer);
 119
 120     setFocus();
 121
 122     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 123             this, SLOT(slotGlobalSettingsChanged(int)));
 124
 125     m_extensionsFactory = new ViewExtensionsFactory(this, controller);
 126     updateGridSize(view->showPreview(), 0);
 127 }
 128
 129 DolphinIconsView::~DolphinIconsView()
 130 {
 131     delete m_categoryDrawer;
 132     m_categoryDrawer = 0;
 133 }
 134
 135 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 136 {
 137     KCategorizedView::dataChanged(topLeft, bottomRight);
 138
 139     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 140     if (!proxyModel->isCategorizedModel()) {
 141         // bypass a QListView issue that items are not layout correctly if the decoration size of
 142         // an index changes
 143         scheduleDelayedItemsLayout();
 144     }
 145 }
 146
 147 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 148 {
 149     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 150     viewOptions.font = m_font;
 151     viewOptions.decorationPosition = m_decorationPosition;
 152     viewOptions.decorationSize = m_decorationSize;
 153     viewOptions.displayAlignment = m_displayAlignment;
 154     viewOptions.showDecorationSelected = true;
 155     return viewOptions;
 156 }
 157
 158 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 159 {
 160     KCategorizedView::contextMenuEvent(event);
 161     m_controller->triggerContextMenuRequest(event->pos());
 162 }
 163
 164 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 165 {
 166     m_controller->requestActivation();
 167     const QModelIndex index = indexAt(event->pos());
 168     if (index.isValid() && (event->button() == Qt::LeftButton)) {
 169         // TODO: It should not be necessary to manually set the dragging state, but I could
 170         // not reproduce this issue with a Qt-only example yet to find the root cause.
 171         // Issue description: start Dolphin, split the view and drag an item from the
 172         // inactive view to the active view by a very fast mouse movement. Result:
 173         // the item gets selected instead of being dragged...
 174         setState(QAbstractItemView::DraggingState);
 175     }
 176
 177     if (!index.isValid()) {
 178         if (QApplication::mouseButtons() & Qt::MidButton) {
 179             m_controller->replaceUrlByClipboard();
 180         }
 181         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 182         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 183             clearSelection();
 184         }
 185     }
 186
 187     KCategorizedView::mousePressEvent(event);
 188 }
 189
 190 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 191 {
 192     DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 193 }
 194
 195 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 196 {
 197     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 198         event->acceptProposedAction();
 199     }
 200 }
 201
 202 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 203 {
 204     Q_UNUSED(event);
 205     setDirtyRegion(m_dropRect);
 206 }
 207
 208 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 209 {
 210     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 211     const QModelIndex index = indexAt(event->pos());
 212     setDirtyRegion(m_dropRect);
 213
 214     m_dropRect.setSize(QSize()); // set as invalid
 215     if (index.isValid()) {
 216         const KFileItem item = m_controller->itemForIndex(index);
 217         if (!item.isNull() && item.isDir()) {
 218             m_dropRect = visualRect(index);
 219         } else {
 220             m_dropRect.setSize(QSize()); // set as invalid
 221         }
 222     }
 223     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 224         // accept url drops, independently from the destination item
 225         event->acceptProposedAction();
 226     }
 227
 228     setDirtyRegion(m_dropRect);
 229 }
 230
 231 void DolphinIconsView::dropEvent(QDropEvent* event)
 232 {
 233     const QModelIndex index = indexAt(event->pos());
 234     const KFileItem item = m_controller->itemForIndex(index);
 235     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 236 }
 237
 238 QModelIndex DolphinIconsView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 239 {
 240     const QModelIndex oldCurrent = currentIndex();
 241
 242     QModelIndex newCurrent = KCategorizedView::moveCursor(cursorAction, modifiers);
 243     if (newCurrent != oldCurrent) {
 244         return newCurrent;
 245     }
 246
 247     // The cursor has not been moved by the base implementation. Provide a
 248     // wrap behavior, so that the cursor will go to the next item when reaching
 249     // the border.
 250     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 251     if (settings->arrangement() == QListView::LeftToRight) {
 252         switch (cursorAction) {
 253         case MoveUp:
 254             if (newCurrent.row() == 0) {
 255                 return newCurrent;
 256             }
 257             newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 258             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 259             newCurrent = KCategorizedView::moveCursor(MovePageDown, modifiers);
 260             break;
 261
 262         case MoveDown:
 263             if (newCurrent.row() == (model()->rowCount() - 1)) {
 264                 return newCurrent;
 265             }
 266             newCurrent = KCategorizedView::moveCursor(MovePageUp, modifiers);
 267             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 268             newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 269             break;
 270
 271         default:
 272             break;
 273         }
 274     } else {
 275         QModelIndex current = oldCurrent;
 276         switch (cursorAction) {
 277         case MoveLeft:
 278             if (newCurrent.row() == 0) {
 279                 return newCurrent;
 280             }
 281             newCurrent = KCategorizedView::moveCursor(MoveUp, modifiers);
 282             do {
 283                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 284                 current = newCurrent;
 285                 newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 286             } while (newCurrent != current);
 287             break;
 288
 289         case MoveRight:
 290             if (newCurrent.row() == (model()->rowCount() - 1)) {
 291                 return newCurrent;
 292             }
 293             do {
 294                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 295                 current = newCurrent;
 296                 newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 297             } while (newCurrent != current);
 298             newCurrent = KCategorizedView::moveCursor(MoveDown, modifiers);
 299             break;
 300
 301         default:
 302             break;
 303         }
 304     }
 305
 306     // Revert all changes of the current item to make sure that item selection works correctly
 307     selectionModel()->setCurrentIndex(oldCurrent, QItemSelectionModel::NoUpdate);
 308     return newCurrent;
 309 }
 310
 311 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 312 {
 313     KCategorizedView::keyPressEvent(event);
 314     m_controller->handleKeyPressEvent(event);
 315 }
 316
 317 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 318 {
 319     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 320     if (event->modifiers() & Qt::ControlModifier) {
 321         event->ignore();
 322         return;
 323     }
 324
 325     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 10);
 326     verticalScrollBar()->setSingleStep(m_itemSize.height() / 10);
 327
 328     KCategorizedView::wheelEvent(event);
 329     // if the icons are aligned left to right, the vertical wheel event should
 330     // be applied to the horizontal scrollbar
 331     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 332     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 333                                   (settings->arrangement() == QListView::LeftToRight);
 334     if (scrollHorizontal) {
 335         QWheelEvent horizEvent(event->pos(),
 336                                event->delta(),
 337                                event->buttons(),
 338                                event->modifiers(),
 339                                Qt::Horizontal);
 340         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 341     }
 342 }
 343
 344 void DolphinIconsView::showEvent(QShowEvent* event)
 345 {
 346     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 347     delegate->setMaximumSize(m_itemSize);
 348
 349     KCategorizedView::showEvent(event);
 350 }
 351
 352 void DolphinIconsView::leaveEvent(QEvent* event)
 353 {
 354     KCategorizedView::leaveEvent(event);
 355     // if the mouse is above an item and moved very fast outside the widget,
 356     // no viewportEntered() signal might be emitted although the mouse has been moved
 357     // above the viewport
 358     m_controller->emitViewportEntered();
 359 }
 360
 361 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 362 {
 363     KCategorizedView::currentChanged(current, previous);
 364     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 365 }
 366
 367 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 368 {
 369     KCategorizedView::resizeEvent(event);
 370     const DolphinView* view = m_controller->dolphinView();
 371     updateGridSize(view->showPreview(), view->additionalInfo().count());
 372 }
 373
 374 void DolphinIconsView::slotShowPreviewChanged()
 375 {
 376     const DolphinView* view = m_controller->dolphinView();
 377     updateGridSize(view->showPreview(), additionalInfoCount());
 378 }
 379
 380 void DolphinIconsView::slotAdditionalInfoChanged()
 381 {
 382     const DolphinView* view = m_controller->dolphinView();
 383     const bool showPreview = view->showPreview();
 384     updateGridSize(showPreview, view->additionalInfo().count());
 385 }
 386
 387 void DolphinIconsView::setNameFilter(const QString& nameFilter)
 388 {
 389     DolphinSortFilterProxyModel* proxyModel = static_cast<DolphinSortFilterProxyModel*>(model());
 390     proxyModel->setFilterRegExp(nameFilter);
 391 }
 392
 393 void DolphinIconsView::setZoomLevel(int level)
 394 {
 395     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 396
 397     const int oldIconSize = settings->iconSize();
 398     int newIconSize = oldIconSize;
 399
 400     const bool showPreview = m_controller->dolphinView()->showPreview();
 401     if (showPreview) {
 402         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 403         settings->setPreviewSize(previewSize);
 404     } else {
 405         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 406         settings->setIconSize(newIconSize);
 407     }
 408
 409     // increase also the grid size
 410     const int diff = newIconSize - oldIconSize;
 411     settings->setItemWidth(settings->itemWidth() + diff);
 412     settings->setItemHeight(settings->itemHeight() + diff);
 413
 414     updateGridSize(showPreview, additionalInfoCount());
 415 }
 416
 417 void DolphinIconsView::requestActivation()
 418 {
 419     m_controller->requestActivation();
 420 }
 421
 422 void DolphinIconsView::slotGlobalSettingsChanged(int category)
 423 {
 424     Q_UNUSED(category);
 425
 426     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 427     Q_ASSERT(settings != 0);
 428     if (settings->useSystemFont()) {
 429         m_font = KGlobalSettings::generalFont();
 430     }
 431
 432     disconnect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 433     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 434     if (KGlobalSettings::singleClick()) {
 435         connect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 436     } else {
 437         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 438     }
 439 }
 440
 441 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 442 {
 443     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 444     Q_ASSERT(settings != 0);
 445
 446     int itemWidth = settings->itemWidth();
 447     int itemHeight = settings->itemHeight();
 448     int size = settings->iconSize();
 449
 450     if (showPreview) {
 451         const int previewSize = settings->previewSize();
 452         const int diff = previewSize - size;
 453         itemWidth  += diff;
 454         itemHeight += diff;
 455
 456         size = previewSize;
 457     }
 458
 459     Q_ASSERT(additionalInfoCount >= 0);
 460     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 461
 462     // Optimize the item size of the grid in a way to prevent large gaps on the
 463     // right border (= row arrangement) or the bottom border (= column arrangement).
 464     // There is no public API in QListView to find out the used width of the viewport
 465     // for the layout. The following calculation of 'contentWidth'/'contentHeight'
 466     // is based on QListViewPrivate::prepareItemsLayout() (Copyright (C) 2009 Nokia Corporation).
 467     int frameAroundContents = 0;
 468     if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 469         frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
 470     }
 471     const int spacing = settings->gridSpacing();
 472     if (settings->arrangement() == QListView::TopToBottom) {
 473         const int contentWidth = viewport()->width() - 1
 474                                  - frameAroundContents
 475                                  - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, horizontalScrollBar());
 476         const int gridWidth = itemWidth + spacing * 2;
 477         const int horizItemCount = contentWidth / gridWidth;
 478         if (horizItemCount > 0) {
 479             itemWidth += (contentWidth - horizItemCount * gridWidth) / horizItemCount;
 480         }
 481
 482         // The decoration width indirectly defines the maximum
 483         // width for the text wrapping. To use the maximum item width
 484         // for text wrapping, it is used as decoration width.
 485         m_decorationSize = QSize(itemWidth, size);
 486         setIconSize(QSize(itemWidth, size));
 487     } else {
 488         const int contentHeight = viewport()->height() - 1
 489                                   - frameAroundContents
 490                                   - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 491         const int gridHeight = itemHeight + spacing;
 492         const int vertItemCount = contentHeight / gridHeight;
 493         if (vertItemCount > 0) {
 494             itemHeight += (contentHeight - vertItemCount * gridHeight) / vertItemCount;
 495         }
 496
 497         m_decorationSize = QSize(size, size);
 498         setIconSize(QSize(size, size));
 499     }
 500
 501     m_itemSize = QSize(itemWidth, itemHeight);
 502     setGridSizeOwn(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 503
 504     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 505     if (delegate != 0) {
 506         delegate->setMaximumSize(m_itemSize);
 507     }
 508 }
 509
 510 int DolphinIconsView::additionalInfoCount() const
 511 {
 512     const DolphinView* view = m_controller->dolphinView();
 513     return view->additionalInfo().count();
 514 }
 515
 516 #include "dolphiniconsview.moc"