src/views/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 "dolphinviewcontroller.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 "viewmodecontroller.h"
  32 #include "zoomlevelinfo.h"
  33
  34 #include <kcategorizedsortfilterproxymodel.h>
  35 #include <kdialog.h>
  36 #include <kfileitemdelegate.h>
  37
  38 #include <QAbstractProxyModel>
  39 #include <QApplication>
  40 #include <QScrollBar>
  41
  42 DolphinIconsView::DolphinIconsView(QWidget* parent,
  43                                    DolphinViewController* dolphinViewController,
  44                                    const ViewModeController* viewModeController,
  45                                    DolphinSortFilterProxyModel* proxyModel) :
  46     KCategorizedView(parent),
  47     m_dolphinViewController(dolphinViewController),
  48     m_viewModeController(viewModeController),
  49     m_categoryDrawer(new DolphinCategoryDrawer(this)),
  50     m_extensionsFactory(0),
  51     m_font(),
  52     m_decorationSize(),
  53     m_decorationPosition(QStyleOptionViewItem::Top),
  54     m_displayAlignment(Qt::AlignHCenter),
  55     m_itemSize(),
  56     m_dropRect()
  57 {
  58     Q_ASSERT(dolphinViewController != 0);
  59     Q_ASSERT(viewModeController != 0);
  60
  61     setModel(proxyModel);
  62     setLayoutDirection(Qt::LeftToRight);
  63     setViewMode(QListView::IconMode);
  64     setResizeMode(QListView::Adjust);
  65     setMovement(QListView::Static);
  66     setDragEnabled(true);
  67     setEditTriggers(QAbstractItemView::NoEditTriggers);
  68     viewport()->setAcceptDrops(true);
  69
  70     setMouseTracking(true);
  71
  72     connect(this, SIGNAL(clicked(const QModelIndex&)),
  73             dolphinViewController, SLOT(requestTab(const QModelIndex&)));
  74     if (KGlobalSettings::singleClick()) {
  75         connect(this, SIGNAL(clicked(const QModelIndex&)),
  76                 dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
  77     } else {
  78         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  79                 dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
  80     }
  81
  82     connect(this, SIGNAL(entered(const QModelIndex&)),
  83             dolphinViewController, SLOT(emitItemEntered(const QModelIndex&)));
  84     connect(this, SIGNAL(viewportEntered()),
  85             dolphinViewController, SLOT(emitViewportEntered()));
  86     connect(viewModeController, SIGNAL(zoomLevelChanged(int)),
  87             this, SLOT(setZoomLevel(int)));
  88
  89     const DolphinView* view = dolphinViewController->view();
  90     connect(view, SIGNAL(showPreviewChanged()),
  91             this, SLOT(slotShowPreviewChanged()));
  92     connect(view, SIGNAL(additionalInfoChanged()),
  93             this, SLOT(slotAdditionalInfoChanged()));
  94
  95     // apply the icons mode settings to the widget
  96     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  97     Q_ASSERT(settings != 0);
  98
  99     if (settings->useSystemFont()) {
 100         m_font = KGlobalSettings::generalFont();
 101     } else {
 102         m_font = QFont(settings->fontFamily(),
 103                        qRound(settings->fontSize()),
 104                        settings->fontWeight(),
 105                        settings->italicFont());
 106         m_font.setPointSizeF(settings->fontSize());
 107     }
 108
 109     setWordWrap(settings->numberOfTextlines() > 1);
 110
 111     if (settings->arrangement() == QListView::TopToBottom) {
 112         setFlow(QListView::LeftToRight);
 113         m_decorationPosition = QStyleOptionViewItem::Top;
 114         m_displayAlignment = Qt::AlignHCenter;
 115     } else {
 116         setFlow(QListView::TopToBottom);
 117         m_decorationPosition = QStyleOptionViewItem::Left;
 118         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 119     }
 120
 121     connect(m_categoryDrawer, SIGNAL(actionRequested(int,QModelIndex)), this, SLOT(categoryDrawerActionRequested(int,QModelIndex)));
 122     setCategoryDrawer(m_categoryDrawer);
 123
 124     setFocus();
 125
 126     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 127             this, SLOT(slotGlobalSettingsChanged(int)));
 128
 129     updateGridSize(view->showPreview(), 0);
 130     m_extensionsFactory = new ViewExtensionsFactory(this, dolphinViewController, viewModeController);
 131 }
 132
 133 DolphinIconsView::~DolphinIconsView()
 134 {
 135 }
 136
 137 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 138 {
 139     KCategorizedView::dataChanged(topLeft, bottomRight);
 140
 141     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 142     if (!proxyModel->isCategorizedModel()) {
 143         // bypass a QListView issue that items are not layout correctly if the decoration size of
 144         // an index changes
 145         scheduleDelayedItemsLayout();
 146     }
 147 }
 148
 149 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 150 {
 151     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 152     viewOptions.font = m_font;
 153     viewOptions.fontMetrics = QFontMetrics(m_font);
 154     viewOptions.decorationPosition = m_decorationPosition;
 155     viewOptions.decorationSize = m_decorationSize;
 156     viewOptions.displayAlignment = m_displayAlignment;
 157     viewOptions.showDecorationSelected = true;
 158     return viewOptions;
 159 }
 160
 161 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 162 {
 163     KCategorizedView::contextMenuEvent(event);
 164     m_dolphinViewController->triggerContextMenuRequest(event->pos());
 165 }
 166
 167 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 168 {
 169     m_dolphinViewController->requestActivation();
 170     const QModelIndex index = indexAt(event->pos());
 171     if (index.isValid() && (event->button() == Qt::LeftButton)) {
 172         // TODO: It should not be necessary to manually set the dragging state, but I could
 173         // not reproduce this issue with a Qt-only example yet to find the root cause.
 174         // Issue description: start Dolphin, split the view and drag an item from the
 175         // inactive view to the active view by a very fast mouse movement. Result:
 176         // the item gets selected instead of being dragged...
 177         setState(QAbstractItemView::DraggingState);
 178     }
 179
 180     if (!index.isValid() && (QApplication::mouseButtons() & Qt::MidButton)) {
 181          m_dolphinViewController->replaceUrlByClipboard();
 182     }
 183
 184     KCategorizedView::mousePressEvent(event);
 185 }
 186
 187 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 188 {
 189     DragAndDropHelper::instance().startDrag(this, supportedActions, m_dolphinViewController);
 190 }
 191
 192 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 193 {
 194     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 195         event->acceptProposedAction();
 196     }
 197 }
 198
 199 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 200 {
 201     KCategorizedView::dragLeaveEvent(event);
 202     setDirtyRegion(m_dropRect);
 203 }
 204
 205 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 206 {
 207     KCategorizedView::dragMoveEvent(event);
 208
 209     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 210     const QModelIndex index = indexAt(event->pos());
 211     setDirtyRegion(m_dropRect);
 212
 213     m_dropRect.setSize(QSize()); // set as invalid
 214     if (index.isValid()) {
 215         const KFileItem item = m_dolphinViewController->itemForIndex(index);
 216         if (!item.isNull() && item.isDir()) {
 217             m_dropRect = visualRect(index);
 218         } else {
 219             m_dropRect.setSize(QSize()); // set as invalid
 220         }
 221     }
 222     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 223         // accept url drops, independently from the destination item
 224         event->acceptProposedAction();
 225     }
 226
 227     setDirtyRegion(m_dropRect);
 228 }
 229
 230 void DolphinIconsView::dropEvent(QDropEvent* event)
 231 {
 232     const QModelIndex index = indexAt(event->pos());
 233     const KFileItem item = m_dolphinViewController->itemForIndex(index);
 234     m_dolphinViewController->indicateDroppedUrls(item, m_viewModeController->url(), event);
 235     // don't call KCategorizedView::dropEvent(event), as it moves
 236     // the items which is not wanted
 237 }
 238
 239 QModelIndex DolphinIconsView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 240 {
 241     const QModelIndex oldCurrent = currentIndex();
 242
 243     QModelIndex newCurrent = KCategorizedView::moveCursor(cursorAction, modifiers);
 244     if (newCurrent != oldCurrent) {
 245         return newCurrent;
 246     }
 247
 248     // The cursor has not been moved by the base implementation. Provide a
 249     // wrap behavior, so that the cursor will go to the next item when reaching
 250     // the border.
 251     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 252     if (settings->arrangement() == QListView::LeftToRight) {
 253         switch (cursorAction) {
 254         case MoveUp:
 255             if (newCurrent.row() == 0) {
 256                 return newCurrent;
 257             }
 258             newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 259             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 260             newCurrent = KCategorizedView::moveCursor(MovePageDown, modifiers);
 261             break;
 262
 263         case MoveDown:
 264             if (newCurrent.row() == (model()->rowCount() - 1)) {
 265                 return newCurrent;
 266             }
 267             newCurrent = KCategorizedView::moveCursor(MovePageUp, modifiers);
 268             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 269             newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 270             break;
 271
 272         default:
 273             break;
 274         }
 275     } else {
 276         QModelIndex current = oldCurrent;
 277         switch (cursorAction) {
 278         case MoveLeft:
 279             if (newCurrent.row() == 0) {
 280                 return newCurrent;
 281             }
 282             newCurrent = KCategorizedView::moveCursor(MoveUp, modifiers);
 283             do {
 284                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 285                 current = newCurrent;
 286                 newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 287             } while (newCurrent != current);
 288             break;
 289
 290         case MoveRight:
 291             if (newCurrent.row() == (model()->rowCount() - 1)) {
 292                 return newCurrent;
 293             }
 294             do {
 295                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 296                 current = newCurrent;
 297                 newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 298             } while (newCurrent != current);
 299             newCurrent = KCategorizedView::moveCursor(MoveDown, modifiers);
 300             break;
 301
 302         default:
 303             break;
 304         }
 305     }
 306
 307     // Revert all changes of the current item to make sure that item selection works correctly
 308     selectionModel()->setCurrentIndex(oldCurrent, QItemSelectionModel::NoUpdate);
 309     return newCurrent;
 310 }
 311
 312 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 313 {
 314     KCategorizedView::keyPressEvent(event);
 315     m_dolphinViewController->handleKeyPressEvent(event);
 316 }
 317
 318 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 319 {
 320     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 5);
 321     verticalScrollBar()->setSingleStep(m_itemSize.height() / 5);
 322
 323     KCategorizedView::wheelEvent(event);
 324     // if the icons are aligned left to right, the vertical wheel event should
 325     // be applied to the horizontal scrollbar
 326     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 327     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 328                                   (settings->arrangement() == QListView::LeftToRight);
 329     if (scrollHorizontal) {
 330         QWheelEvent horizEvent(event->pos(),
 331                                event->delta(),
 332                                event->buttons(),
 333                                event->modifiers(),
 334                                Qt::Horizontal);
 335         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 336     }
 337 }
 338
 339 void DolphinIconsView::showEvent(QShowEvent* event)
 340 {
 341     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 342     delegate->setMaximumSize(m_itemSize);
 343
 344     KCategorizedView::showEvent(event);
 345 }
 346
 347 void DolphinIconsView::leaveEvent(QEvent* event)
 348 {
 349     KCategorizedView::leaveEvent(event);
 350     // if the mouse is above an item and moved very fast outside the widget,
 351     // no viewportEntered() signal might be emitted although the mouse has been moved
 352     // above the viewport
 353     m_dolphinViewController->emitViewportEntered();
 354 }
 355
 356 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 357 {
 358     KCategorizedView::currentChanged(current, previous);
 359     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 360 }
 361
 362 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 363 {
 364     KCategorizedView::resizeEvent(event);
 365     const DolphinView* view = m_dolphinViewController->view();
 366     updateGridSize(view->showPreview(), view->additionalInfo().count());
 367 }
 368
 369 void DolphinIconsView::slotShowPreviewChanged()
 370 {
 371     const DolphinView* view = m_dolphinViewController->view();
 372     updateGridSize(view->showPreview(), additionalInfoCount());
 373 }
 374
 375 void DolphinIconsView::slotAdditionalInfoChanged()
 376 {
 377     const DolphinView* view = m_dolphinViewController->view();
 378     const bool showPreview = view->showPreview();
 379     updateGridSize(showPreview, view->additionalInfo().count());
 380 }
 381
 382 void DolphinIconsView::setZoomLevel(int level)
 383 {
 384     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 385
 386     const int oldIconSize = settings->iconSize();
 387     int newIconSize = oldIconSize;
 388
 389     const bool showPreview = m_dolphinViewController->view()->showPreview();
 390     if (showPreview) {
 391         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 392         settings->setPreviewSize(previewSize);
 393     } else {
 394         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 395         settings->setIconSize(newIconSize);
 396     }
 397
 398     // increase also the grid size
 399     const int diff = newIconSize - oldIconSize;
 400     settings->setItemWidth(settings->itemWidth() + diff);
 401     settings->setItemHeight(settings->itemHeight() + diff);
 402
 403     updateGridSize(showPreview, additionalInfoCount());
 404 }
 405
 406 void DolphinIconsView::requestActivation()
 407 {
 408     m_dolphinViewController->requestActivation();
 409 }
 410
 411 void DolphinIconsView::slotGlobalSettingsChanged(int category)
 412 {
 413     Q_UNUSED(category);
 414
 415     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 416     Q_ASSERT(settings != 0);
 417     if (settings->useSystemFont()) {
 418         m_font = KGlobalSettings::generalFont();
 419     }
 420
 421     disconnect(this, SIGNAL(clicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 422     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 423     if (KGlobalSettings::singleClick()) {
 424         connect(this, SIGNAL(clicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 425     } else {
 426         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 427     }
 428 }
 429
 430 void DolphinIconsView::categoryDrawerActionRequested(int action, const QModelIndex &index)
 431 {
 432     const QSortFilterProxyModel *model = dynamic_cast<const QSortFilterProxyModel*>(index.model());
 433     const QModelIndex topLeft = model->index(index.row(), modelColumn());
 434     QModelIndex bottomRight = topLeft;
 435     const QString category = model->data(index, KCategorizedSortFilterProxyModel::CategoryDisplayRole).toString();
 436     QModelIndex current = topLeft;
 437     while (true) {
 438         current = model->index(current.row() + 1, modelColumn());
 439         const QString curCategory = model->data(model->index(current.row(), index.column()), KCategorizedSortFilterProxyModel::CategoryDisplayRole).toString();
 440         if (!current.isValid() || category != curCategory) {
 441             break;
 442         }
 443         bottomRight = current;
 444     }
 445     switch (action) {
 446         case DolphinCategoryDrawer::SelectAll:
 447             selectionModel()->select(QItemSelection(topLeft, bottomRight), QItemSelectionModel::Select);
 448             break;
 449         case DolphinCategoryDrawer::UnselectAll:
 450             selectionModel()->select(QItemSelection(topLeft, bottomRight), QItemSelectionModel::Deselect);
 451             break;
 452         default:
 453             break;
 454     }
 455 }
 456
 457 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 458 {
 459     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 460     Q_ASSERT(settings != 0);
 461
 462     int itemWidth = settings->itemWidth();
 463     int itemHeight = settings->itemHeight();
 464     int size = settings->iconSize();
 465
 466     if (showPreview) {
 467         const int previewSize = settings->previewSize();
 468         const int diff = previewSize - size;
 469         itemWidth  += diff;
 470         itemHeight += diff;
 471
 472         size = previewSize;
 473     }
 474
 475     Q_ASSERT(additionalInfoCount >= 0);
 476     itemHeight += additionalInfoCount * QFontMetrics(m_font).height();
 477
 478     // Optimize the item size of the grid in a way to prevent large gaps on the
 479     // right border (= row arrangement) or the bottom border (= column arrangement).
 480     // There is no public API in QListView to find out the used width of the viewport
 481     // for the layout. The following calculation of 'contentWidth'/'contentHeight'
 482     // is based on QListViewPrivate::prepareItemsLayout() (Copyright (C) 2009 Nokia Corporation).
 483     int frameAroundContents = 0;
 484     if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 485         frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
 486     }
 487     const int spacing = settings->gridSpacing();
 488     if (settings->arrangement() == QListView::TopToBottom) {
 489         const int contentWidth = viewport()->width() - 1
 490                                  - frameAroundContents
 491                                  - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, horizontalScrollBar());
 492         const int gridWidth = itemWidth + spacing * 2;
 493         const int horizItemCount = contentWidth / gridWidth;
 494         if (horizItemCount > 0) {
 495             itemWidth += (contentWidth - horizItemCount * gridWidth) / horizItemCount;
 496         }
 497
 498         // The decoration width indirectly defines the maximum
 499         // width for the text wrapping. To use the maximum item width
 500         // for text wrapping, it is used as decoration width.
 501         m_decorationSize = QSize(itemWidth, size);
 502         setIconSize(QSize(itemWidth, size));
 503     } else {
 504         const int contentHeight = viewport()->height() - 1
 505                                   - frameAroundContents
 506                                   - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 507         const int gridHeight = itemHeight + spacing;
 508         const int vertItemCount = contentHeight / gridHeight;
 509         if (vertItemCount > 0) {
 510             itemHeight += (contentHeight - vertItemCount * gridHeight) / vertItemCount;
 511         }
 512
 513         m_decorationSize = QSize(size, size);
 514         setIconSize(QSize(size, size));
 515     }
 516
 517     m_itemSize = QSize(itemWidth, itemHeight);
 518     setGridSizeOwn(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 519
 520     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 521     if (delegate != 0) {
 522         delegate->setMaximumSize(m_itemSize);
 523     }
 524 }
 525
 526 int DolphinIconsView::additionalInfoCount() const
 527 {
 528     const DolphinView* view = m_dolphinViewController->view();
 529     return view->additionalInfo().count();
 530 }
 531
 532 #include "dolphiniconsview.moc"