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(new DolphinCategoryDrawer(this)),
  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                        qRound(settings->fontSize()),
  99                        settings->fontWeight(),
 100                        settings->italicFont());
 101         m_font.setPointSizeF(settings->fontSize());
 102     }
 103
 104     setWordWrap(settings->numberOfTextlines() > 1);
 105
 106     if (settings->arrangement() == QListView::TopToBottom) {
 107         setFlow(QListView::LeftToRight);
 108         m_decorationPosition = QStyleOptionViewItem::Top;
 109         m_displayAlignment = Qt::AlignHCenter;
 110     } else {
 111         setFlow(QListView::TopToBottom);
 112         m_decorationPosition = QStyleOptionViewItem::Left;
 113         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 114     }
 115
 116     connect(m_categoryDrawer, SIGNAL(actionRequested(int,QModelIndex)), this, SLOT(categoryDrawerActionRequested(int,QModelIndex)));
 117     setCategoryDrawer(m_categoryDrawer);
 118
 119     setFocus();
 120
 121     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 122             this, SLOT(slotGlobalSettingsChanged(int)));
 123
 124     updateGridSize(view->showPreview(), 0);
 125     m_extensionsFactory = new ViewExtensionsFactory(this, controller);
 126 }
 127
 128 DolphinIconsView::~DolphinIconsView()
 129 {
 130 }
 131
 132 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 133 {
 134     KCategorizedView::dataChanged(topLeft, bottomRight);
 135
 136     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 137     if (!proxyModel->isCategorizedModel()) {
 138         // bypass a QListView issue that items are not layout correctly if the decoration size of
 139         // an index changes
 140         scheduleDelayedItemsLayout();
 141     }
 142 }
 143
 144 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 145 {
 146     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 147     viewOptions.font = m_font;
 148     viewOptions.fontMetrics = QFontMetrics(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() && (QApplication::mouseButtons() & Qt::MidButton)) {
 176          m_controller->replaceUrlByClipboard();
 177     }
 178
 179     KCategorizedView::mousePressEvent(event);
 180 }
 181
 182 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 183 {
 184     DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 185 }
 186
 187 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 188 {
 189     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 190         event->acceptProposedAction();
 191     }
 192 }
 193
 194 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 195 {
 196     KCategorizedView::dragLeaveEvent(event);
 197     setDirtyRegion(m_dropRect);
 198 }
 199
 200 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 201 {
 202     KCategorizedView::dragMoveEvent(event);
 203
 204     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 205     const QModelIndex index = indexAt(event->pos());
 206     setDirtyRegion(m_dropRect);
 207
 208     m_dropRect.setSize(QSize()); // set as invalid
 209     if (index.isValid()) {
 210         const KFileItem item = m_controller->itemForIndex(index);
 211         if (!item.isNull() && item.isDir()) {
 212             m_dropRect = visualRect(index);
 213         } else {
 214             m_dropRect.setSize(QSize()); // set as invalid
 215         }
 216     }
 217     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 218         // accept url drops, independently from the destination item
 219         event->acceptProposedAction();
 220     }
 221
 222     setDirtyRegion(m_dropRect);
 223 }
 224
 225 void DolphinIconsView::dropEvent(QDropEvent* event)
 226 {
 227     const QModelIndex index = indexAt(event->pos());
 228     const KFileItem item = m_controller->itemForIndex(index);
 229     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 230     // don't call KCategorizedView::dropEvent(event), as it moves
 231     // the items which is not wanted
 232 }
 233
 234 QModelIndex DolphinIconsView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 235 {
 236     const QModelIndex oldCurrent = currentIndex();
 237
 238     QModelIndex newCurrent = KCategorizedView::moveCursor(cursorAction, modifiers);
 239     if (newCurrent != oldCurrent) {
 240         return newCurrent;
 241     }
 242
 243     // The cursor has not been moved by the base implementation. Provide a
 244     // wrap behavior, so that the cursor will go to the next item when reaching
 245     // the border.
 246     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 247     if (settings->arrangement() == QListView::LeftToRight) {
 248         switch (cursorAction) {
 249         case MoveUp:
 250             if (newCurrent.row() == 0) {
 251                 return newCurrent;
 252             }
 253             newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 254             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 255             newCurrent = KCategorizedView::moveCursor(MovePageDown, modifiers);
 256             break;
 257
 258         case MoveDown:
 259             if (newCurrent.row() == (model()->rowCount() - 1)) {
 260                 return newCurrent;
 261             }
 262             newCurrent = KCategorizedView::moveCursor(MovePageUp, modifiers);
 263             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 264             newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 265             break;
 266
 267         default:
 268             break;
 269         }
 270     } else {
 271         QModelIndex current = oldCurrent;
 272         switch (cursorAction) {
 273         case MoveLeft:
 274             if (newCurrent.row() == 0) {
 275                 return newCurrent;
 276             }
 277             newCurrent = KCategorizedView::moveCursor(MoveUp, modifiers);
 278             do {
 279                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 280                 current = newCurrent;
 281                 newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 282             } while (newCurrent != current);
 283             break;
 284
 285         case MoveRight:
 286             if (newCurrent.row() == (model()->rowCount() - 1)) {
 287                 return newCurrent;
 288             }
 289             do {
 290                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 291                 current = newCurrent;
 292                 newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 293             } while (newCurrent != current);
 294             newCurrent = KCategorizedView::moveCursor(MoveDown, modifiers);
 295             break;
 296
 297         default:
 298             break;
 299         }
 300     }
 301
 302     // Revert all changes of the current item to make sure that item selection works correctly
 303     selectionModel()->setCurrentIndex(oldCurrent, QItemSelectionModel::NoUpdate);
 304     return newCurrent;
 305 }
 306
 307 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 308 {
 309     KCategorizedView::keyPressEvent(event);
 310     m_controller->handleKeyPressEvent(event);
 311 }
 312
 313 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 314 {
 315     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 5);
 316     verticalScrollBar()->setSingleStep(m_itemSize.height() / 5);
 317
 318     KCategorizedView::wheelEvent(event);
 319     // if the icons are aligned left to right, the vertical wheel event should
 320     // be applied to the horizontal scrollbar
 321     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 322     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 323                                   (settings->arrangement() == QListView::LeftToRight);
 324     if (scrollHorizontal) {
 325         QWheelEvent horizEvent(event->pos(),
 326                                event->delta(),
 327                                event->buttons(),
 328                                event->modifiers(),
 329                                Qt::Horizontal);
 330         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 331     }
 332 }
 333
 334 void DolphinIconsView::showEvent(QShowEvent* event)
 335 {
 336     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 337     delegate->setMaximumSize(m_itemSize);
 338
 339     KCategorizedView::showEvent(event);
 340 }
 341
 342 void DolphinIconsView::leaveEvent(QEvent* event)
 343 {
 344     KCategorizedView::leaveEvent(event);
 345     // if the mouse is above an item and moved very fast outside the widget,
 346     // no viewportEntered() signal might be emitted although the mouse has been moved
 347     // above the viewport
 348     m_controller->emitViewportEntered();
 349 }
 350
 351 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 352 {
 353     KCategorizedView::currentChanged(current, previous);
 354     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 355 }
 356
 357 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 358 {
 359     KCategorizedView::resizeEvent(event);
 360     const DolphinView* view = m_controller->dolphinView();
 361     updateGridSize(view->showPreview(), view->additionalInfo().count());
 362 }
 363
 364 void DolphinIconsView::slotShowPreviewChanged()
 365 {
 366     const DolphinView* view = m_controller->dolphinView();
 367     updateGridSize(view->showPreview(), additionalInfoCount());
 368 }
 369
 370 void DolphinIconsView::slotAdditionalInfoChanged()
 371 {
 372     const DolphinView* view = m_controller->dolphinView();
 373     const bool showPreview = view->showPreview();
 374     updateGridSize(showPreview, view->additionalInfo().count());
 375 }
 376
 377 void DolphinIconsView::setZoomLevel(int level)
 378 {
 379     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 380
 381     const int oldIconSize = settings->iconSize();
 382     int newIconSize = oldIconSize;
 383
 384     const bool showPreview = m_controller->dolphinView()->showPreview();
 385     if (showPreview) {
 386         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 387         settings->setPreviewSize(previewSize);
 388     } else {
 389         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 390         settings->setIconSize(newIconSize);
 391     }
 392
 393     // increase also the grid size
 394     const int diff = newIconSize - oldIconSize;
 395     settings->setItemWidth(settings->itemWidth() + diff);
 396     settings->setItemHeight(settings->itemHeight() + diff);
 397
 398     updateGridSize(showPreview, additionalInfoCount());
 399 }
 400
 401 void DolphinIconsView::requestActivation()
 402 {
 403     m_controller->requestActivation();
 404 }
 405
 406 void DolphinIconsView::slotGlobalSettingsChanged(int category)
 407 {
 408     Q_UNUSED(category);
 409
 410     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 411     Q_ASSERT(settings != 0);
 412     if (settings->useSystemFont()) {
 413         m_font = KGlobalSettings::generalFont();
 414     }
 415
 416     disconnect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 417     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 418     if (KGlobalSettings::singleClick()) {
 419         connect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 420     } else {
 421         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 422     }
 423 }
 424
 425 void DolphinIconsView::categoryDrawerActionRequested(int action, const QModelIndex &index)
 426 {
 427     const QSortFilterProxyModel *model = dynamic_cast<const QSortFilterProxyModel*>(index.model());
 428     const QModelIndex topLeft = model->index(index.row(), modelColumn());
 429     QModelIndex bottomRight = topLeft;
 430     const QString category = model->data(index, KCategorizedSortFilterProxyModel::CategoryDisplayRole).toString();
 431     QModelIndex current = topLeft;
 432     while (true) {
 433         current = model->index(current.row() + 1, modelColumn());
 434         const QString curCategory = model->data(model->index(current.row(), index.column()), KCategorizedSortFilterProxyModel::CategoryDisplayRole).toString();
 435         if (!current.isValid() || category != curCategory) {
 436             break;
 437         }
 438         bottomRight = current;
 439     }
 440     switch (action) {
 441         case DolphinCategoryDrawer::SelectAll:
 442             selectionModel()->select(QItemSelection(topLeft, bottomRight), QItemSelectionModel::Select);
 443             break;
 444         case DolphinCategoryDrawer::UnselectAll:
 445             selectionModel()->select(QItemSelection(topLeft, bottomRight), QItemSelectionModel::Deselect);
 446             break;
 447         default:
 448             break;
 449     }
 450 }
 451
 452 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 453 {
 454     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 455     Q_ASSERT(settings != 0);
 456
 457     int itemWidth = settings->itemWidth();
 458     int itemHeight = settings->itemHeight();
 459     int size = settings->iconSize();
 460
 461     if (showPreview) {
 462         const int previewSize = settings->previewSize();
 463         const int diff = previewSize - size;
 464         itemWidth  += diff;
 465         itemHeight += diff;
 466
 467         size = previewSize;
 468     }
 469
 470     Q_ASSERT(additionalInfoCount >= 0);
 471     itemHeight += additionalInfoCount * QFontMetrics(m_font).height();
 472
 473     // Optimize the item size of the grid in a way to prevent large gaps on the
 474     // right border (= row arrangement) or the bottom border (= column arrangement).
 475     // There is no public API in QListView to find out the used width of the viewport
 476     // for the layout. The following calculation of 'contentWidth'/'contentHeight'
 477     // is based on QListViewPrivate::prepareItemsLayout() (Copyright (C) 2009 Nokia Corporation).
 478     int frameAroundContents = 0;
 479     if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 480         frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
 481     }
 482     const int spacing = settings->gridSpacing();
 483     if (settings->arrangement() == QListView::TopToBottom) {
 484         const int contentWidth = viewport()->width() - 1
 485                                  - frameAroundContents
 486                                  - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, horizontalScrollBar());
 487         const int gridWidth = itemWidth + spacing * 2;
 488         const int horizItemCount = contentWidth / gridWidth;
 489         if (horizItemCount > 0) {
 490             itemWidth += (contentWidth - horizItemCount * gridWidth) / horizItemCount;
 491         }
 492
 493         // The decoration width indirectly defines the maximum
 494         // width for the text wrapping. To use the maximum item width
 495         // for text wrapping, it is used as decoration width.
 496         m_decorationSize = QSize(itemWidth, size);
 497         setIconSize(QSize(itemWidth, size));
 498     } else {
 499         const int contentHeight = viewport()->height() - 1
 500                                   - frameAroundContents
 501                                   - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 502         const int gridHeight = itemHeight + spacing;
 503         const int vertItemCount = contentHeight / gridHeight;
 504         if (vertItemCount > 0) {
 505             itemHeight += (contentHeight - vertItemCount * gridHeight) / vertItemCount;
 506         }
 507
 508         m_decorationSize = QSize(size, size);
 509         setIconSize(QSize(size, size));
 510     }
 511
 512     m_itemSize = QSize(itemWidth, itemHeight);
 513     setGridSizeOwn(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 514
 515     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 516     if (delegate != 0) {
 517         delegate->setMaximumSize(m_itemSize);
 518     }
 519 }
 520
 521 int DolphinIconsView::additionalInfoCount() const
 522 {
 523     const DolphinView* view = m_controller->dolphinView();
 524     return view->additionalInfo().count();
 525 }
 526
 527 #include "dolphiniconsview.moc"