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