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