src/dolphindetailsview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz (peter.penz@gmx.at)                  *
   3  *   Copyright (C) 2008 by Simon St. James (kdedevel@etotheipiplusone.com) *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  19  ***************************************************************************/
  20
  21 #include "dolphindetailsview.h"
  22
  23 #include "dolphinmodel.h"
  24 #include "dolphincontroller.h"
  25 #include "dolphinfileitemdelegate.h"
  26 #include "settings/dolphinsettings.h"
  27 #include "dolphinsortfilterproxymodel.h"
  28 #include "dolphinviewautoscroller.h"
  29 #include "draganddrophelper.h"
  30 #include "viewextensionsfactory.h"
  31 #include "viewproperties.h"
  32 #include "zoomlevelinfo.h"
  33
  34 #include "dolphin_detailsmodesettings.h"
  35 #include "dolphin_generalsettings.h"
  36
  37 #include <kdirmodel.h>
  38 #include <klocale.h>
  39 #include <kmenu.h>
  40
  41 #include <QAction>
  42 #include <QApplication>
  43 #include <QHeaderView>
  44 #include <QRubberBand>
  45 #include <QPainter>
  46 #include <QScrollBar>
  47
  48 DolphinDetailsView::DolphinDetailsView(QWidget* parent,
  49                                        DolphinController* controller,
  50                                        DolphinSortFilterProxyModel* proxyModel) :
  51     QTreeView(parent),
  52     m_autoResize(true),
  53     m_expandingTogglePressed(false),
  54     m_keyPressed(false),
  55     m_useDefaultIndexAt(true),
  56     m_ignoreScrollTo(false),
  57     m_controller(controller),
  58     m_extensionsFactory(0),
  59     m_expandableFoldersAction(0),
  60     m_expandedUrls(),
  61     m_font(),
  62     m_decorationSize(),
  63     m_band()
  64 {
  65     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  66     Q_ASSERT(settings != 0);
  67     Q_ASSERT(controller != 0);
  68
  69     setLayoutDirection(Qt::LeftToRight);
  70     setAcceptDrops(true);
  71     setSortingEnabled(true);
  72     setUniformRowHeights(true);
  73     setSelectionBehavior(SelectItems);
  74     setDragDropMode(QAbstractItemView::DragDrop);
  75     setDropIndicatorShown(false);
  76     setAlternatingRowColors(true);
  77     setRootIsDecorated(settings->expandableFolders());
  78     setItemsExpandable(settings->expandableFolders());
  79     setEditTriggers(QAbstractItemView::NoEditTriggers);
  80     setModel(proxyModel);
  81
  82     setMouseTracking(true);
  83
  84     const ViewProperties props(controller->url());
  85     setSortIndicatorSection(props.sorting());
  86     setSortIndicatorOrder(props.sortOrder());
  87
  88     QHeaderView* headerView = header();
  89     connect(headerView, SIGNAL(sectionClicked(int)),
  90             this, SLOT(synchronizeSortingState(int)));
  91     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  92     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  93             this, SLOT(configureSettings(const QPoint&)));
  94     connect(headerView, SIGNAL(sectionResized(int, int, int)),
  95             this, SLOT(slotHeaderSectionResized(int, int, int)));
  96     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
  97             this, SLOT(disableAutoResizing()));
  98
  99     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
 100             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
 101     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
 102             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
 103
 104     connect(this, SIGNAL(clicked(const QModelIndex&)),
 105             controller, SLOT(requestTab(const QModelIndex&)));
 106     if (KGlobalSettings::singleClick()) {
 107         connect(this, SIGNAL(clicked(const QModelIndex&)),
 108                 controller, SLOT(triggerItem(const QModelIndex&)));
 109     } else {
 110         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 111                 controller, SLOT(triggerItem(const QModelIndex&)));
 112     }
 113
 114     connect(this, SIGNAL(entered(const QModelIndex&)),
 115             this, SLOT(slotEntered(const QModelIndex&)));
 116     connect(this, SIGNAL(viewportEntered()),
 117             controller, SLOT(emitViewportEntered()));
 118     connect(controller, SIGNAL(zoomLevelChanged(int)),
 119             this, SLOT(setZoomLevel(int)));
 120     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged()),
 121             this, SLOT(updateColumnVisibility()));
 122     connect(controller, SIGNAL(activationChanged(bool)),
 123             this, SLOT(slotActivationChanged(bool)));
 124
 125     if (settings->useSystemFont()) {
 126         m_font = KGlobalSettings::generalFont();
 127     } else {
 128         m_font = QFont(settings->fontFamily(),
 129                        qRound(settings->fontSize()),
 130                        settings->fontWeight(),
 131                        settings->italicFont());
 132         m_font.setPointSizeF(settings->fontSize());
 133     }
 134
 135     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 136     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 137
 138     const DolphinView* view = controller->dolphinView();
 139     connect(view, SIGNAL(showPreviewChanged()),
 140             this, SLOT(slotShowPreviewChanged()));
 141
 142
 143     setFocus();
 144     viewport()->installEventFilter(this);
 145
 146     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 147             this, SLOT(slotGlobalSettingsChanged(int)));
 148
 149     m_useDefaultIndexAt = false;
 150
 151     m_expandableFoldersAction = new QAction(i18nc("@option:check", "Expandable Folders"), this);
 152     m_expandableFoldersAction->setCheckable(true);
 153     connect(m_expandableFoldersAction, SIGNAL(toggled(bool)),
 154             this, SLOT(setFoldersExpandable(bool)));
 155
 156     connect(this, SIGNAL(expanded(const QModelIndex&)), this, SLOT(slotExpanded(const QModelIndex&)));
 157     connect(this, SIGNAL(collapsed(const QModelIndex&)), this, SLOT(slotCollapsed(const QModelIndex&)));
 158
 159     updateDecorationSize(view->showPreview());
 160
 161     m_extensionsFactory = new ViewExtensionsFactory(this, controller);
 162     m_extensionsFactory->fileItemDelegate()->setMinimizedNameColumn(true);
 163     m_extensionsFactory->setAutoFolderExpandingEnabled(settings->expandableFolders());
 164 }
 165
 166 DolphinDetailsView::~DolphinDetailsView()
 167 {
 168 }
 169
 170 QSet<KUrl> DolphinDetailsView::expandedUrls() const
 171 {
 172     return m_expandedUrls;
 173 }
 174
 175 QRegion DolphinDetailsView::visualRegionForSelection(const QItemSelection& selection) const
 176 {
 177     // We have to make sure that the visualRect of each model index is inside the region.
 178     // QTreeView::visualRegionForSelection does not do it right because it assumes implicitly
 179     // that all visualRects have the same width, which is in general not the case here.
 180     QRegion selectionRegion;
 181     const QModelIndexList indexes = selection.indexes();
 182
 183     foreach(const QModelIndex& index, indexes) {
 184         selectionRegion += visualRect(index);
 185     }
 186
 187     return selectionRegion;
 188 }
 189
 190 bool DolphinDetailsView::event(QEvent* event)
 191 {
 192     switch (event->type()) {
 193     case QEvent::Polish:
 194         header()->setResizeMode(QHeaderView::Interactive);
 195         updateColumnVisibility();
 196         break;
 197
 198     case QEvent::FocusOut:
 199         // If a key-press triggers an action that e. g. opens a dialog, the
 200         // widget gets no key-release event. Assure that the pressed state
 201         // is reset to prevent accidently setting the current index during a selection.
 202         m_keyPressed = false;
 203         break;
 204
 205     default:
 206         break;
 207     }
 208
 209     return QTreeView::event(event);
 210 }
 211
 212 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 213 {
 214     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 215     viewOptions.font = m_font;
 216     viewOptions.fontMetrics = QFontMetrics(m_font);
 217     viewOptions.showDecorationSelected = true;
 218     viewOptions.decorationSize = m_decorationSize;
 219     return viewOptions;
 220 }
 221
 222 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 223 {
 224     QTreeView::contextMenuEvent(event);
 225
 226     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 227     m_expandableFoldersAction->setChecked(settings->expandableFolders());
 228     m_controller->triggerContextMenuRequest(event->pos(),
 229                                             QList<QAction*>() << m_expandableFoldersAction);
 230 }
 231
 232 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 233 {
 234     m_controller->requestActivation();
 235
 236     const QModelIndex current = currentIndex();
 237     QTreeView::mousePressEvent(event);
 238
 239     m_expandingTogglePressed = isAboveExpandingToggle(event->pos());
 240
 241     const QModelIndex index = indexAt(event->pos());
 242     const bool updateState = index.isValid() &&
 243                              (index.column() == DolphinModel::Name) &&
 244                              (event->button() == Qt::LeftButton);
 245     if (updateState) {
 246         setState(QAbstractItemView::DraggingState);
 247     }
 248
 249     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 250         // the mouse press is done somewhere outside the filename column
 251         if (QApplication::mouseButtons() & Qt::MidButton) {
 252             m_controller->replaceUrlByClipboard();
 253         }
 254
 255         const Qt::KeyboardModifiers mod = QApplication::keyboardModifiers();
 256         if (!m_expandingTogglePressed && !(mod & Qt::ShiftModifier) && !(mod & Qt::ControlModifier)) {
 257             clearSelection();
 258         }
 259
 260         // restore the current index, other columns are handled as viewport area.
 261         // setCurrentIndex(...) implicitly calls scrollTo(...), which we want to ignore.
 262         m_ignoreScrollTo = true;
 263         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 264         m_ignoreScrollTo = false;
 265
 266         if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 267             // Inform Qt about what we are doing - otherwise it starts dragging items around!
 268             setState(DragSelectingState);
 269             m_band.show = true;
 270             // Incremental update data will not be useful - start from scratch.
 271             m_band.ignoreOldInfo = true;
 272             const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 273             m_band.origin = event->pos()  + scrollPos;
 274             m_band.destination = m_band.origin;
 275             m_band.originalSelection = selectionModel()->selection();
 276         }
 277     }
 278 }
 279
 280 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 281 {
 282     if (m_expandingTogglePressed) {
 283         // Per default QTreeView starts either a selection or a drag operation when dragging
 284         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 285         // Turn off this behavior in Dolphin to stay predictable:
 286         setState(QAbstractItemView::NoState);
 287         return;
 288     }
 289
 290     if (m_band.show) {
 291         const QPoint mousePos = event->pos();
 292         const QModelIndex index = indexAt(mousePos);
 293         if (!index.isValid()) {
 294             // the destination of the selection rectangle is above the viewport. In this
 295             // case QTreeView does no selection at all, which is not the wanted behavior
 296             // in Dolphin -> select all items within the elastic band rectangle
 297             updateElasticBandSelection();
 298         }
 299
 300         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 301         // as the Qt-issue #199631 has been fixed.
 302         // QTreeView::mouseMoveEvent(event);
 303         QAbstractItemView::mouseMoveEvent(event);
 304         updateElasticBand();
 305     } else {
 306         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 307         // as the Qt-issue #199631 has been fixed.
 308         // QTreeView::mouseMoveEvent(event);
 309         QAbstractItemView::mouseMoveEvent(event);
 310     }
 311 }
 312
 313 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 314 {
 315     if (!m_expandingTogglePressed) {
 316         const QModelIndex index = indexAt(event->pos());
 317         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 318             QTreeView::mouseReleaseEvent(event);
 319         } else {
 320             // don't change the current index if the cursor is released
 321             // above any other column than the name column, as the other
 322             // columns act as viewport
 323             const QModelIndex current = currentIndex();
 324             QTreeView::mouseReleaseEvent(event);
 325             selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 326         }
 327     }
 328     m_expandingTogglePressed = false;
 329
 330     if (m_band.show) {
 331         setState(NoState);
 332         updateElasticBand();
 333         m_band.show = false;
 334     }
 335 }
 336
 337 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 338 {
 339     DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 340     m_band.show = false;
 341 }
 342
 343 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 344 {
 345     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 346         event->acceptProposedAction();
 347     }
 348
 349     if (m_band.show) {
 350         updateElasticBand();
 351         m_band.show = false;
 352     }
 353 }
 354
 355 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 356 {
 357     QTreeView::dragLeaveEvent(event);
 358     setDirtyRegion(m_dropRect);
 359 }
 360
 361 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 362 {
 363     QTreeView::dragMoveEvent(event);
 364
 365     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 366     setDirtyRegion(m_dropRect);
 367     const QModelIndex index = indexAt(event->pos());
 368     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 369         const KFileItem item = m_controller->itemForIndex(index);
 370         if (!item.isNull() && item.isDir()) {
 371             m_dropRect = visualRect(index);
 372         } else {
 373             m_dropRect.setSize(QSize()); // set as invalid
 374         }
 375         setDirtyRegion(m_dropRect);
 376     }
 377
 378     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 379         // accept url drops, independently from the destination item
 380         event->acceptProposedAction();
 381     }
 382 }
 383
 384 void DolphinDetailsView::dropEvent(QDropEvent* event)
 385 {
 386     const QModelIndex index = indexAt(event->pos());
 387     KFileItem item;
 388     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 389         item = m_controller->itemForIndex(index);
 390     }
 391     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 392     QTreeView::dropEvent(event);
 393 }
 394
 395 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 396 {
 397     QTreeView::paintEvent(event);
 398     if (m_band.show) {
 399         // The following code has been taken from QListView
 400         // and adapted to DolphinDetailsView.
 401         // (C) 1992-2007 Trolltech ASA
 402         QStyleOptionRubberBand opt;
 403         opt.initFrom(this);
 404         opt.shape = QRubberBand::Rectangle;
 405         opt.opaque = false;
 406         opt.rect = elasticBandRect();
 407
 408         QPainter painter(viewport());
 409         painter.save();
 410         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 411         painter.restore();
 412     }
 413 }
 414
 415 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 416 {
 417     // If the Control modifier is pressed, a multiple selection
 418     // is done and DolphinDetailsView::currentChanged() may not
 419     // not change the selection in a custom way.
 420     m_keyPressed = !(event->modifiers() & Qt::ControlModifier);
 421
 422     QTreeView::keyPressEvent(event);
 423     m_controller->handleKeyPressEvent(event);
 424 }
 425
 426 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 427 {
 428     QTreeView::keyReleaseEvent(event);
 429     m_keyPressed = false;
 430 }
 431
 432 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 433 {
 434     QTreeView::resizeEvent(event);
 435     if (m_autoResize) {
 436         resizeColumns();
 437     }
 438 }
 439
 440 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 441 {
 442     const int step = m_decorationSize.height();
 443     verticalScrollBar()->setSingleStep(step);
 444     QTreeView::wheelEvent(event);
 445 }
 446
 447 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 448 {
 449     QTreeView::currentChanged(current, previous);
 450     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 451
 452     // Stay consistent with QListView: When changing the current index by key presses,
 453     // also change the selection.
 454     if (m_keyPressed) {
 455         setCurrentIndex(current);
 456     }
 457
 458     // If folders are expanded, the width which is available for editing may have changed
 459     // because it depends on the level of the current item in the folder hierarchy.
 460     adjustMaximumSizeForEditing(current);
 461 }
 462
 463 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 464 {
 465     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 466         // if the mouse is above an item and moved very fast outside the widget,
 467         // no viewportEntered() signal might be emitted although the mouse has been moved
 468         // above the viewport
 469         m_controller->emitViewportEntered();
 470     }
 471
 472     return QTreeView::eventFilter(watched, event);
 473 }
 474
 475 QModelIndex DolphinDetailsView::indexAt(const QPoint& point) const
 476 {
 477     // the blank portion of the name column counts as empty space
 478     const QModelIndex index = QTreeView::indexAt(point);
 479     const bool isAboveEmptySpace  = !m_useDefaultIndexAt &&
 480                                     (index.column() == KDirModel::Name) && !visualRect(index).contains(point);
 481     return isAboveEmptySpace ? QModelIndex() : index;
 482 }
 483
 484 QRect DolphinDetailsView::visualRect(const QModelIndex& index) const
 485 {
 486     QRect rect = QTreeView::visualRect(index);
 487     const KFileItem item = m_controller->itemForIndex(index);
 488     if (!item.isNull()) {
 489         const int width = DolphinFileItemDelegate::nameColumnWidth(item.text(), viewOptions());
 490         rect.setWidth(width);
 491     }
 492
 493     return rect;
 494 }
 495
 496 void DolphinDetailsView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags command)
 497 {
 498     // We must override setSelection() as Qt calls it internally and when this happens
 499     // we must ensure that the default indexAt() is used.
 500     if (!m_band.show) {
 501         m_useDefaultIndexAt = true;
 502         QTreeView::setSelection(rect, command);
 503         m_useDefaultIndexAt = false;
 504     } else {
 505         // Use our own elastic band selection algorithm
 506         updateElasticBandSelection();
 507     }
 508 }
 509
 510 void DolphinDetailsView::scrollTo(const QModelIndex & index, ScrollHint hint)
 511 {
 512     if (!m_ignoreScrollTo) {
 513         QTreeView::scrollTo(index, hint);
 514     }
 515 }
 516
 517 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 518 {
 519     header()->setSortIndicator(sorting, header()->sortIndicatorOrder());
 520 }
 521
 522 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 523 {
 524     header()->setSortIndicator(header()->sortIndicatorSection(), sortOrder);
 525 }
 526
 527 void DolphinDetailsView::synchronizeSortingState(int column)
 528 {
 529     // The sorting has already been changed in QTreeView if this slot is
 530     // invoked, but Dolphin is not informed about this.
 531     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 532     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 533     m_controller->indicateSortingChange(sorting);
 534     m_controller->indicateSortOrderChange(sortOrder);
 535 }
 536
 537 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 538 {
 539     if (index.column() == DolphinModel::Name) {
 540         m_controller->emitItemEntered(index);
 541     } else {
 542         m_controller->emitViewportEntered();
 543     }
 544 }
 545
 546 void DolphinDetailsView::updateElasticBand()
 547 {
 548     if (m_band.show) {
 549         QRect dirtyRegion(elasticBandRect());
 550         const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 551         m_band.destination = viewport()->mapFromGlobal(QCursor::pos()) + scrollPos;
 552         // Going above the (logical) top-left of the view causes complications during selection;
 553         // we may as well prevent it.
 554         if (m_band.destination.y() < 0) {
 555             m_band.destination.setY(0);
 556         }
 557         if (m_band.destination.x() < 0) {
 558             m_band.destination.setX(0);
 559         }
 560         dirtyRegion = dirtyRegion.united(elasticBandRect());
 561         setDirtyRegion(dirtyRegion);
 562     }
 563 }
 564
 565 QRect DolphinDetailsView::elasticBandRect() const
 566 {
 567     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 568
 569     const QPoint topLeft = m_band.origin - scrollPos;
 570     const QPoint bottomRight = m_band.destination - scrollPos;
 571     return QRect(topLeft, bottomRight).normalized();
 572 }
 573
 574 void DolphinDetailsView::setZoomLevel(int level)
 575 {
 576     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 577     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 578
 579     const bool showPreview = m_controller->dolphinView()->showPreview();
 580     if (showPreview) {
 581         settings->setPreviewSize(size);
 582     } else {
 583         settings->setIconSize(size);
 584     }
 585
 586     updateDecorationSize(showPreview);
 587 }
 588
 589 void DolphinDetailsView::slotShowPreviewChanged()
 590 {
 591     const DolphinView* view = m_controller->dolphinView();
 592     updateDecorationSize(view->showPreview());
 593 }
 594
 595 void DolphinDetailsView::configureSettings(const QPoint& pos)
 596 {
 597     KMenu popup(this);
 598     popup.addTitle(i18nc("@title:menu", "Columns"));
 599
 600     // add checkbox items for each column
 601     QHeaderView* headerView = header();
 602     const int columns = model()->columnCount();
 603     for (int i = 0; i < columns; ++i) {
 604         const int logicalIndex = headerView->logicalIndex(i);
 605         const QString text = model()->headerData(logicalIndex, Qt::Horizontal).toString();
 606         QAction* action = popup.addAction(text);
 607         action->setCheckable(true);
 608         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 609         action->setData(logicalIndex);
 610         action->setEnabled(logicalIndex != DolphinModel::Name);
 611     }
 612     popup.addSeparator();
 613
 614     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 615     if (activatedAction != 0) {
 616         const bool show = activatedAction->isChecked();
 617         const int columnIndex = activatedAction->data().toInt();
 618
 619         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 620         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 621         if (show) {
 622             Q_ASSERT(!list.contains(info));
 623             list.append(info);
 624         } else {
 625             Q_ASSERT(list.contains(info));
 626             const int index = list.indexOf(info);
 627             list.removeAt(index);
 628         }
 629
 630         m_controller->indicateAdditionalInfoChange(list);
 631         setColumnHidden(columnIndex, !show);
 632         resizeColumns();
 633     }
 634 }
 635
 636 void DolphinDetailsView::updateColumnVisibility()
 637 {
 638     QHeaderView* headerView = header();
 639     disconnect(headerView, SIGNAL(sectionMoved(int, int, int)),
 640                this, SLOT(saveColumnPositions()));
 641
 642     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 643     const QList<int> columnPositions = settings->columnPositions();
 644
 645     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 646     for (int i = DolphinModel::Name; i <= DolphinModel::Version; ++i) {
 647         const KFileItemDelegate::Information info = infoForColumn(i);
 648         const bool hide = !list.contains(info) && (i != DolphinModel::Name);
 649         if (isColumnHidden(i) != hide) {
 650             setColumnHidden(i, hide);
 651         }
 652
 653         const int from = headerView->visualIndex(i);
 654         headerView->moveSection(from, columnPositions[i]);
 655     }
 656
 657     resizeColumns();
 658
 659     connect(headerView, SIGNAL(sectionMoved(int, int, int)),
 660             this, SLOT(saveColumnPositions()));
 661
 662 }
 663
 664 void DolphinDetailsView::saveColumnPositions()
 665 {
 666     QList<int> columnPositions;
 667     for (int i = DolphinModel::Name; i <= DolphinModel::Version; ++i) {
 668         columnPositions.append(header()->visualIndex(i));
 669     }
 670
 671     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 672     settings->setColumnPositions(columnPositions);
 673 }
 674
 675 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 676 {
 677     Q_UNUSED(logicalIndex);
 678     Q_UNUSED(oldSize);
 679     Q_UNUSED(newSize);
 680     // If the user changes the size of the headers, the autoresize feature should be
 681     // turned off. As there is no dedicated interface to find out whether the header
 682     // section has been resized by the user or by a resize event, another approach is used.
 683     // Attention: Take care when changing the if-condition to verify that there is no
 684     // regression in combination with bug 178630 (see fix in comment #8).
 685     if ((QApplication::mouseButtons() & Qt::LeftButton) && header()->underMouse()) {
 686         disableAutoResizing();
 687     }
 688
 689     adjustMaximumSizeForEditing(currentIndex());
 690 }
 691
 692 void DolphinDetailsView::slotActivationChanged(bool active)
 693 {
 694     setAlternatingRowColors(active);
 695 }
 696
 697 void DolphinDetailsView::disableAutoResizing()
 698 {
 699     m_autoResize = false;
 700 }
 701
 702 void DolphinDetailsView::requestActivation()
 703 {
 704     m_controller->requestActivation();
 705 }
 706
 707 void DolphinDetailsView::slotGlobalSettingsChanged(int category)
 708 {
 709     Q_UNUSED(category);
 710
 711     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 712     Q_ASSERT(settings != 0);
 713     if (settings->useSystemFont()) {
 714         m_font = KGlobalSettings::generalFont();
 715     }
 716     //Disconnect then reconnect, since the settings have been changed, the connection requirements may have also.
 717     disconnect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 718     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 719     if (KGlobalSettings::singleClick()) {
 720         connect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 721     } else {
 722         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 723     }
 724 }
 725
 726 void DolphinDetailsView::updateElasticBandSelection()
 727 {
 728     if (!m_band.show) {
 729         return;
 730     }
 731
 732     // Ensure the elastic band itself is up-to-date, in
 733     // case we are being called due to e.g. a drag event.
 734     updateElasticBand();
 735
 736     // Clip horizontally to the name column, as some filenames will be
 737     // longer than the column.  We don't clip vertically as origin
 738     // may be above or below the current viewport area.
 739     const int nameColumnX = header()->sectionPosition(DolphinModel::Name);
 740     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 741     QRect selRect = elasticBandRect().normalized();
 742     QRect nameColumnArea(nameColumnX, selRect.y(), nameColumnWidth, selRect.height());
 743     selRect = nameColumnArea.intersect(selRect).normalized();
 744     // Get the last elastic band rectangle, expressed in viewpoint coordinates.
 745     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 746     QRect oldSelRect = QRect(m_band.lastSelectionOrigin - scrollPos, m_band.lastSelectionDestination - scrollPos).normalized();
 747
 748     if (selRect.isNull()) {
 749         selectionModel()->select(m_band.originalSelection, QItemSelectionModel::ClearAndSelect);
 750         m_band.ignoreOldInfo = true;
 751         return;
 752     }
 753
 754     if (!m_band.ignoreOldInfo) {
 755         // Do some quick checks to see if we can rule out the need to
 756         // update the selection.
 757         Q_ASSERT(uniformRowHeights());
 758         QModelIndex dummyIndex = model()->index(0, 0);
 759         if (!dummyIndex.isValid()) {
 760             // No items in the model presumably.
 761             return;
 762         }
 763
 764         // If the elastic band does not cover the same rows as before, we'll
 765         // need to re-check, and also invalidate the old item distances.
 766         const int rowHeight = QTreeView::rowHeight(dummyIndex);
 767         const bool coveringSameRows =
 768             (selRect.top()    / rowHeight == oldSelRect.top()    / rowHeight) &&
 769             (selRect.bottom() / rowHeight == oldSelRect.bottom() / rowHeight);
 770         if (coveringSameRows) {
 771             // Covering the same rows, but have we moved far enough horizontally
 772             // that we might have (de)selected some other items?
 773             const bool itemSelectionChanged =
 774                 ((selRect.left() > oldSelRect.left()) &&
 775                  (selRect.left() > m_band.insideNearestLeftEdge)) ||
 776                 ((selRect.left() < oldSelRect.left()) &&
 777                  (selRect.left() <= m_band.outsideNearestLeftEdge)) ||
 778                 ((selRect.right() < oldSelRect.right()) &&
 779                  (selRect.left() >= m_band.insideNearestRightEdge)) ||
 780                 ((selRect.right() > oldSelRect.right()) &&
 781                  (selRect.right() >= m_band.outsideNearestRightEdge));
 782
 783             if (!itemSelectionChanged) {
 784                 return;
 785             }
 786         }
 787     } else {
 788         // This is the only piece of optimization data that needs to be explicitly
 789         // discarded.
 790         m_band.lastSelectionOrigin = QPoint();
 791         m_band.lastSelectionDestination = QPoint();
 792         oldSelRect = selRect;
 793     }
 794
 795     // Do the selection from scratch. Force a update of the horizontal distances info.
 796     m_band.insideNearestLeftEdge   = nameColumnX + nameColumnWidth + 1;
 797     m_band.insideNearestRightEdge  = nameColumnX - 1;
 798     m_band.outsideNearestLeftEdge  = nameColumnX - 1;
 799     m_band.outsideNearestRightEdge = nameColumnX + nameColumnWidth + 1;
 800
 801     // Include the old selection rect as well, so we can deselect
 802     // items that were inside it but not in the new selRect.
 803     const QRect boundingRect = selRect.united(oldSelRect).normalized();
 804     if (boundingRect.isNull()) {
 805         return;
 806     }
 807
 808     // Get the index of the item in this row in the name column.
 809     // TODO - would this still work if the columns could be re-ordered?
 810     QModelIndex startIndex = QTreeView::indexAt(boundingRect.topLeft());
 811     if (startIndex.parent().isValid()) {
 812         startIndex = startIndex.parent().child(startIndex.row(), KDirModel::Name);
 813     } else {
 814         startIndex = model()->index(startIndex.row(), KDirModel::Name);
 815     }
 816     if (!startIndex.isValid()) {
 817         selectionModel()->select(m_band.originalSelection, QItemSelectionModel::ClearAndSelect);
 818         m_band.ignoreOldInfo = true;
 819         return;
 820     }
 821
 822    // Go through all indexes between the top and bottom of boundingRect, and
 823    // update the selection.
 824    const int verticalCutoff = boundingRect.bottom();
 825    QModelIndex currIndex = startIndex;
 826    QModelIndex lastIndex;
 827    bool allItemsInBoundDone = false;
 828
 829    // Calling selectionModel()->select(...) for each item that needs to be
 830    // toggled is slow as each call emits selectionChanged(...) so store them
 831    // and do the selection toggle in one batch.
 832    QItemSelection itemsToToggle;
 833    // QItemSelection's deal with continuous ranges of indexes better than
 834    // single indexes, so try to portion items that need to be toggled into ranges.
 835    bool formingToggleIndexRange = false;
 836    QModelIndex toggleIndexRangeBegin = QModelIndex();
 837
 838    do {
 839        QRect currIndexRect = visualRect(currIndex);
 840
 841         // Update some optimization info as we go.
 842        const int cr = currIndexRect.right();
 843        const int cl = currIndexRect.left();
 844        const int sl = selRect.left();
 845        const int sr = selRect.right();
 846        // "The right edge of the name is outside of the rect but nearer than m_outsideNearestLeft", etc
 847        if ((cr < sl && cr > m_band.outsideNearestLeftEdge)) {
 848            m_band.outsideNearestLeftEdge = cr;
 849        }
 850        if ((cl > sr && cl < m_band.outsideNearestRightEdge)) {
 851            m_band.outsideNearestRightEdge = cl;
 852        }
 853        if ((cl >= sl && cl <= sr && cl > m_band.insideNearestRightEdge)) {
 854            m_band.insideNearestRightEdge = cl;
 855        }
 856        if ((cr >= sl && cr <= sr && cr < m_band.insideNearestLeftEdge)) {
 857            m_band.insideNearestLeftEdge = cr;
 858        }
 859
 860        bool currentlySelected = selectionModel()->isSelected(currIndex);
 861        bool originallySelected = m_band.originalSelection.contains(currIndex);
 862        bool intersectsSelectedRect = currIndexRect.intersects(selRect);
 863        bool shouldBeSelected = (intersectsSelectedRect && !originallySelected) || (!intersectsSelectedRect && originallySelected);
 864        bool needToToggleItem = (currentlySelected && !shouldBeSelected) || (!currentlySelected && shouldBeSelected);
 865        if (needToToggleItem && !formingToggleIndexRange) {
 866             toggleIndexRangeBegin = currIndex;
 867             formingToggleIndexRange = true;
 868        }
 869
 870        // NOTE: indexBelow actually walks up and down expanded trees for us.
 871        QModelIndex nextIndex = indexBelow(currIndex);
 872        allItemsInBoundDone = !nextIndex.isValid() || currIndexRect.top() > verticalCutoff;
 873
 874        const bool commitToggleIndexRange = formingToggleIndexRange &&
 875                                            (!needToToggleItem ||
 876                                             allItemsInBoundDone ||
 877                                             currIndex.parent() != toggleIndexRangeBegin.parent());
 878        if (commitToggleIndexRange) {
 879            formingToggleIndexRange = false;
 880             // If this is the last item in the bounds and it is also the beginning of a range,
 881             // don't toggle lastIndex - it will already have been dealt with.
 882            if (!allItemsInBoundDone || toggleIndexRangeBegin != currIndex) {
 883                itemsToToggle.select(toggleIndexRangeBegin, lastIndex);
 884            }
 885             // Need to start a new range immediately with currIndex?
 886            if (needToToggleItem) {
 887                toggleIndexRangeBegin = currIndex;
 888                formingToggleIndexRange = true;
 889            }
 890            if (allItemsInBoundDone && needToToggleItem) {
 891                 // Toggle the very last item in the bounds.
 892                itemsToToggle.select(currIndex, currIndex);
 893            }
 894        }
 895
 896        // next item
 897        lastIndex = currIndex;
 898        currIndex = nextIndex;
 899     } while (!allItemsInBoundDone);
 900
 901
 902     selectionModel()->select(itemsToToggle, QItemSelectionModel::Toggle);
 903
 904     m_band.lastSelectionOrigin = m_band.origin;
 905     m_band.lastSelectionDestination = m_band.destination;
 906     m_band.ignoreOldInfo = false;
 907 }
 908
 909 void DolphinDetailsView::setFoldersExpandable(bool expandable)
 910 {
 911     if (!expandable) {
 912         // collapse all expanded folders, as QTreeView::setItemsExpandable(false)
 913         // does not do this task
 914         const int rowCount = model()->rowCount();
 915         for (int row = 0; row < rowCount; ++row) {
 916             setExpanded(model()->index(row, 0), false);
 917         }
 918     }
 919     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 920     settings->setExpandableFolders(expandable);
 921     setRootIsDecorated(expandable);
 922     setItemsExpandable(expandable);
 923
 924     // The width of the space which is available for editing has changed
 925     // because of the (dis)appearance of the expanding toggles
 926     adjustMaximumSizeForEditing(currentIndex());
 927 }
 928
 929 void DolphinDetailsView::slotExpanded(const QModelIndex& index)
 930 {
 931     KFileItem item = m_controller->itemForIndex(index);
 932     if (!item.isNull()) {
 933         m_expandedUrls.insert(item.url());
 934     }
 935 }
 936
 937 void DolphinDetailsView::slotCollapsed(const QModelIndex& index)
 938 {
 939     KFileItem item = m_controller->itemForIndex(index);
 940     if (!item.isNull()) {
 941         m_expandedUrls.remove(item.url());
 942     }
 943 }
 944
 945 void DolphinDetailsView::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end)
 946 {
 947     removeExpandedIndexes(parent, start, end);
 948     QTreeView::rowsAboutToBeRemoved(parent, start, end);
 949 }
 950
 951 void DolphinDetailsView::removeExpandedIndexes(const QModelIndex& parent, int start, int end)
 952 {
 953     if (m_expandedUrls.isEmpty()) {
 954         return;
 955     }
 956
 957     for (int row = start; row <= end; row++) {
 958         const QModelIndex index = model()->index(row, 0, parent);
 959         if (isExpanded(index)) {
 960             slotCollapsed(index);
 961             removeExpandedIndexes(index, 0, model()->rowCount(index) - 1);
 962         }
 963     }
 964 }
 965
 966 void DolphinDetailsView::updateDecorationSize(bool showPreview)
 967 {
 968     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 969     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 970     setIconSize(QSize(iconSize, iconSize));
 971     m_decorationSize = QSize(iconSize, iconSize);
 972
 973     doItemsLayout();
 974 }
 975
 976 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 977 {
 978     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 979
 980     switch (columnIndex) {
 981     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 982     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 983     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 984     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 985     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 986     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 987     default: break;
 988     }
 989
 990     return info;
 991 }
 992
 993 void DolphinDetailsView::resizeColumns()
 994 {
 995     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 996     // around 3 seconds for each (!) resize operation when having > 10000 items).
 997     // This gets a problem especially when opening large directories, where several
 998     // resize operations are received for showing the currently available items during
 999     // loading (the application hangs around 20 seconds when loading > 10000 items).
1000
1001     QHeaderView* headerView = header();
1002     QFontMetrics fontMetrics(viewport()->font());
1003
1004     int columnWidth[DolphinModel::Version + 1];
1005     columnWidth[DolphinModel::Size] = fontMetrics.width("00000 Items");
1006     columnWidth[DolphinModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
1007     columnWidth[DolphinModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
1008     columnWidth[DolphinModel::Owner] = fontMetrics.width("xxxxxxxxxx");
1009     columnWidth[DolphinModel::Group] = fontMetrics.width("xxxxxxxxxx");
1010     columnWidth[DolphinModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
1011     columnWidth[DolphinModel::Version] = fontMetrics.width("xxxxxxxx");
1012
1013     int requiredWidth = 0;
1014     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
1015         if (!isColumnHidden(i)) {
1016             columnWidth[i] += 20; // provide a default gap
1017             requiredWidth += columnWidth[i];
1018             headerView->resizeSection(i, columnWidth[i]);
1019         }
1020     }
1021
1022     // resize the name column in a way that the whole available width is used
1023     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
1024
1025     const int minNameWidth = 300;
1026     if (columnWidth[KDirModel::Name] < minNameWidth) {
1027         columnWidth[KDirModel::Name] = minNameWidth;
1028
1029         // It might be possible that the name column width can be
1030         // decreased without clipping any text. For performance
1031         // reasons the exact necessary width for full visible names is
1032         // only checked for up to 200 items:
1033         const int rowCount = model()->rowCount();
1034         if (rowCount > 0 && rowCount < 200) {
1035             const int nameWidth = sizeHintForColumn(DolphinModel::Name);
1036             if (nameWidth + requiredWidth <= viewport()->width()) {
1037                 columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
1038             } else if (nameWidth < minNameWidth) {
1039                 columnWidth[KDirModel::Name] = nameWidth;
1040             }
1041         }
1042     }
1043
1044     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
1045 }
1046
1047 bool DolphinDetailsView::isAboveExpandingToggle(const QPoint& pos) const
1048 {
1049     // QTreeView offers no public API to get the information whether an index has an
1050     // expanding toggle and what boundaries the toggle has. The following approach
1051     // also assumes a toggle for file items.
1052     if (itemsExpandable()) {
1053         const QModelIndex index = QTreeView::indexAt(pos);
1054         if (index.isValid() && (index.column() == KDirModel::Name)) {
1055             QRect rect = visualRect(index);
1056             const int toggleSize = rect.height();
1057             if (isRightToLeft()) {
1058                 rect.moveRight(rect.right());
1059             } else {
1060                 rect.moveLeft(rect.x() - toggleSize);
1061             }
1062             rect.setWidth(toggleSize);
1063
1064             QStyleOption opt;
1065             opt.initFrom(this);
1066             opt.rect = rect;
1067             rect = style()->subElementRect(QStyle::SE_TreeViewDisclosureItem, &opt, this);
1068
1069             return rect.contains(pos);
1070         }
1071     }
1072     return false;
1073 }
1074
1075 void DolphinDetailsView::adjustMaximumSizeForEditing(const QModelIndex& index)
1076 {
1077     // Make sure that the full width of the "Name" column is available for "Rename Inline"
1078     m_extensionsFactory->fileItemDelegate()->setMaximumSize(QTreeView::visualRect(index).size());
1079 }
1080
1081 DolphinDetailsView::ElasticBand::ElasticBand() :
1082     show(false),
1083     origin(),
1084     destination(),
1085     lastSelectionOrigin(),
1086     lastSelectionDestination(),
1087     ignoreOldInfo(true),
1088     outsideNearestLeftEdge(0),
1089     outsideNearestRightEdge(0),
1090     insideNearestLeftEdge(0),
1091     insideNearestRightEdge(0)
1092 {
1093 }
1094
1095 #include "dolphindetailsview.moc"