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 "dolphinviewcontroller.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 "viewmodecontroller.h"
  32 #include "viewproperties.h"
  33 #include "zoomlevelinfo.h"
  34
  35 #include "dolphin_detailsmodesettings.h"
  36 #include "dolphin_generalsettings.h"
  37
  38 #include <kdirmodel.h>
  39 #include <klocale.h>
  40 #include <kmenu.h>
  41
  42 #include <QAction>
  43 #include <QApplication>
  44 #include <QHeaderView>
  45 #include <QRubberBand>
  46 #include <QPainter>
  47 #include <QScrollBar>
  48
  49 DolphinDetailsView::DolphinDetailsView(QWidget* parent,
  50                                        DolphinViewController* dolphinViewController,
  51                                        const ViewModeController* viewModeController,
  52                                        DolphinSortFilterProxyModel* proxyModel) :
  53     QTreeView(parent),
  54     m_autoResize(true),
  55     m_expandingTogglePressed(false),
  56     m_keyPressed(false),
  57     m_useDefaultIndexAt(true),
  58     m_ignoreScrollTo(false),
  59     m_dolphinViewController(dolphinViewController),
  60     m_viewModeController(viewModeController),
  61     m_extensionsFactory(0),
  62     m_expandableFoldersAction(0),
  63     m_expandedUrls(),
  64     m_font(),
  65     m_decorationSize(),
  66     m_band()
  67 {
  68     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  69     Q_ASSERT(settings != 0);
  70     Q_ASSERT(dolphinViewController != 0);
  71     Q_ASSERT(viewModeController != 0);
  72
  73     setLayoutDirection(Qt::LeftToRight);
  74     setAcceptDrops(true);
  75     setSortingEnabled(true);
  76     setUniformRowHeights(true);
  77     setSelectionBehavior(SelectItems);
  78     setDragDropMode(QAbstractItemView::DragDrop);
  79     setDropIndicatorShown(false);
  80     setAlternatingRowColors(true);
  81     setRootIsDecorated(settings->expandableFolders());
  82     setItemsExpandable(settings->expandableFolders());
  83     setEditTriggers(QAbstractItemView::NoEditTriggers);
  84     setModel(proxyModel);
  85
  86     setMouseTracking(true);
  87
  88     const ViewProperties props(viewModeController->url());
  89     setSortIndicatorSection(props.sorting());
  90     setSortIndicatorOrder(props.sortOrder());
  91
  92     QHeaderView* headerView = header();
  93     connect(headerView, SIGNAL(sectionClicked(int)),
  94             this, SLOT(synchronizeSortingState(int)));
  95     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  96     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  97             this, SLOT(configureSettings(const QPoint&)));
  98     connect(headerView, SIGNAL(sectionResized(int, int, int)),
  99             this, SLOT(slotHeaderSectionResized(int, int, int)));
 100     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
 101             this, SLOT(disableAutoResizing()));
 102
 103     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
 104             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
 105     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
 106             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
 107
 108     connect(this, SIGNAL(clicked(const QModelIndex&)),
 109             dolphinViewController, SLOT(requestTab(const QModelIndex&)));
 110     if (KGlobalSettings::singleClick()) {
 111         connect(this, SIGNAL(clicked(const QModelIndex&)),
 112                 dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 113     } else {
 114         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 115                 dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 116     }
 117
 118     connect(this, SIGNAL(entered(const QModelIndex&)),
 119             this, SLOT(slotEntered(const QModelIndex&)));
 120     connect(this, SIGNAL(viewportEntered()),
 121             dolphinViewController, SLOT(emitViewportEntered()));
 122     connect(viewModeController, SIGNAL(zoomLevelChanged(int)),
 123             this, SLOT(setZoomLevel(int)));
 124     connect(dolphinViewController->view(), SIGNAL(additionalInfoChanged()),
 125             this, SLOT(updateColumnVisibility()));
 126     connect(viewModeController, SIGNAL(activationChanged(bool)),
 127             this, SLOT(slotActivationChanged(bool)));
 128
 129     if (settings->useSystemFont()) {
 130         m_font = KGlobalSettings::generalFont();
 131     } else {
 132         m_font = QFont(settings->fontFamily(),
 133                        qRound(settings->fontSize()),
 134                        settings->fontWeight(),
 135                        settings->italicFont());
 136         m_font.setPointSizeF(settings->fontSize());
 137     }
 138
 139     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 140     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 141
 142     const DolphinView* view = dolphinViewController->view();
 143     connect(view, SIGNAL(showPreviewChanged()),
 144             this, SLOT(slotShowPreviewChanged()));
 145
 146
 147     setFocus();
 148     viewport()->installEventFilter(this);
 149
 150     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 151             this, SLOT(slotGlobalSettingsChanged(int)));
 152
 153     m_useDefaultIndexAt = false;
 154
 155     m_expandableFoldersAction = new QAction(i18nc("@option:check", "Expandable Folders"), this);
 156     m_expandableFoldersAction->setCheckable(true);
 157     connect(m_expandableFoldersAction, SIGNAL(toggled(bool)),
 158             this, SLOT(setFoldersExpandable(bool)));
 159
 160     connect(this, SIGNAL(expanded(const QModelIndex&)), this, SLOT(slotExpanded(const QModelIndex&)));
 161     connect(this, SIGNAL(collapsed(const QModelIndex&)), this, SLOT(slotCollapsed(const QModelIndex&)));
 162
 163     updateDecorationSize(view->showPreview());
 164
 165     m_extensionsFactory = new ViewExtensionsFactory(this, dolphinViewController, viewModeController);
 166     m_extensionsFactory->fileItemDelegate()->setMinimizedNameColumn(true);
 167     m_extensionsFactory->setAutoFolderExpandingEnabled(settings->expandableFolders());
 168 }
 169
 170 DolphinDetailsView::~DolphinDetailsView()
 171 {
 172 }
 173
 174 QSet<KUrl> DolphinDetailsView::expandedUrls() const
 175 {
 176     return m_expandedUrls;
 177 }
 178
 179 QRegion DolphinDetailsView::visualRegionForSelection(const QItemSelection& selection) const
 180 {
 181     // We have to make sure that the visualRect of each model index is inside the region.
 182     // QTreeView::visualRegionForSelection does not do it right because it assumes implicitly
 183     // that all visualRects have the same width, which is in general not the case here.
 184     QRegion selectionRegion;
 185     const QModelIndexList indexes = selection.indexes();
 186
 187     foreach(const QModelIndex& index, indexes) {
 188         selectionRegion += visualRect(index);
 189     }
 190
 191     return selectionRegion;
 192 }
 193
 194 bool DolphinDetailsView::event(QEvent* event)
 195 {
 196     switch (event->type()) {
 197     case QEvent::Polish:
 198         header()->setResizeMode(QHeaderView::Interactive);
 199         updateColumnVisibility();
 200         break;
 201
 202     case QEvent::FocusOut:
 203         // If a key-press triggers an action that e. g. opens a dialog, the
 204         // widget gets no key-release event. Assure that the pressed state
 205         // is reset to prevent accidently setting the current index during a selection.
 206         m_keyPressed = false;
 207         break;
 208
 209     default:
 210         break;
 211     }
 212
 213     return QTreeView::event(event);
 214 }
 215
 216 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 217 {
 218     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 219     viewOptions.font = m_font;
 220     viewOptions.fontMetrics = QFontMetrics(m_font);
 221     viewOptions.showDecorationSelected = true;
 222     viewOptions.decorationSize = m_decorationSize;
 223     return viewOptions;
 224 }
 225
 226 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 227 {
 228     QTreeView::contextMenuEvent(event);
 229
 230     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 231     m_expandableFoldersAction->setChecked(settings->expandableFolders());
 232     m_dolphinViewController->triggerContextMenuRequest(event->pos(),
 233                                             QList<QAction*>() << m_expandableFoldersAction);
 234 }
 235
 236 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 237 {
 238     m_dolphinViewController->requestActivation();
 239
 240     const QModelIndex current = currentIndex();
 241     QTreeView::mousePressEvent(event);
 242
 243     m_expandingTogglePressed = isAboveExpandingToggle(event->pos());
 244
 245     const QModelIndex index = indexAt(event->pos());
 246     const bool updateState = index.isValid() &&
 247                              (index.column() == DolphinModel::Name) &&
 248                              (event->button() == Qt::LeftButton);
 249     if (updateState) {
 250         setState(QAbstractItemView::DraggingState);
 251     }
 252
 253     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 254         // the mouse press is done somewhere outside the filename column
 255         if (QApplication::mouseButtons() & Qt::MidButton) {
 256             m_dolphinViewController->replaceUrlByClipboard();
 257         }
 258
 259         const Qt::KeyboardModifiers mod = QApplication::keyboardModifiers();
 260         if (!m_expandingTogglePressed && !(mod & Qt::ShiftModifier) && !(mod & Qt::ControlModifier)) {
 261             clearSelection();
 262         }
 263
 264         // restore the current index, other columns are handled as viewport area.
 265         // setCurrentIndex(...) implicitly calls scrollTo(...), which we want to ignore.
 266         m_ignoreScrollTo = true;
 267         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 268         m_ignoreScrollTo = false;
 269
 270         if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 271             // Inform Qt about what we are doing - otherwise it starts dragging items around!
 272             setState(DragSelectingState);
 273             m_band.show = true;
 274             // Incremental update data will not be useful - start from scratch.
 275             m_band.ignoreOldInfo = true;
 276             const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 277             m_band.origin = event->pos()  + scrollPos;
 278             m_band.destination = m_band.origin;
 279             m_band.originalSelection = selectionModel()->selection();
 280         }
 281     }
 282 }
 283
 284 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 285 {
 286     if (m_expandingTogglePressed) {
 287         // Per default QTreeView starts either a selection or a drag operation when dragging
 288         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 289         // Turn off this behavior in Dolphin to stay predictable:
 290         setState(QAbstractItemView::NoState);
 291         return;
 292     }
 293
 294     if (m_band.show) {
 295         const QPoint mousePos = event->pos();
 296         const QModelIndex index = indexAt(mousePos);
 297         if (!index.isValid()) {
 298             // the destination of the selection rectangle is above the viewport. In this
 299             // case QTreeView does no selection at all, which is not the wanted behavior
 300             // in Dolphin -> select all items within the elastic band rectangle
 301             updateElasticBandSelection();
 302         }
 303
 304         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 305         // as the Qt-issue #199631 has been fixed.
 306         // QTreeView::mouseMoveEvent(event);
 307         QAbstractItemView::mouseMoveEvent(event);
 308         updateElasticBand();
 309     } else {
 310         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 311         // as the Qt-issue #199631 has been fixed.
 312         // QTreeView::mouseMoveEvent(event);
 313         QAbstractItemView::mouseMoveEvent(event);
 314     }
 315 }
 316
 317 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 318 {
 319     if (!m_expandingTogglePressed) {
 320         const QModelIndex index = indexAt(event->pos());
 321         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 322             QTreeView::mouseReleaseEvent(event);
 323         } else {
 324             // don't change the current index if the cursor is released
 325             // above any other column than the name column, as the other
 326             // columns act as viewport
 327             const QModelIndex current = currentIndex();
 328             QTreeView::mouseReleaseEvent(event);
 329             selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 330         }
 331     }
 332     m_expandingTogglePressed = false;
 333
 334     if (m_band.show) {
 335         setState(NoState);
 336         updateElasticBand();
 337         m_band.show = false;
 338     }
 339 }
 340
 341 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 342 {
 343     DragAndDropHelper::instance().startDrag(this, supportedActions, m_dolphinViewController);
 344     m_band.show = false;
 345 }
 346
 347 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 348 {
 349     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 350         event->acceptProposedAction();
 351     }
 352
 353     if (m_band.show) {
 354         updateElasticBand();
 355         m_band.show = false;
 356     }
 357 }
 358
 359 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 360 {
 361     QTreeView::dragLeaveEvent(event);
 362     setDirtyRegion(m_dropRect);
 363 }
 364
 365 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 366 {
 367     QTreeView::dragMoveEvent(event);
 368
 369     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 370     setDirtyRegion(m_dropRect);
 371     const QModelIndex index = indexAt(event->pos());
 372     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 373         const KFileItem item = m_dolphinViewController->itemForIndex(index);
 374         if (!item.isNull() && item.isDir()) {
 375             m_dropRect = visualRect(index);
 376         } else {
 377             m_dropRect.setSize(QSize()); // set as invalid
 378         }
 379         setDirtyRegion(m_dropRect);
 380     }
 381
 382     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 383         // accept url drops, independently from the destination item
 384         event->acceptProposedAction();
 385     }
 386 }
 387
 388 void DolphinDetailsView::dropEvent(QDropEvent* event)
 389 {
 390     const QModelIndex index = indexAt(event->pos());
 391     KFileItem item;
 392     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 393         item = m_dolphinViewController->itemForIndex(index);
 394     }
 395     m_dolphinViewController->indicateDroppedUrls(item, m_viewModeController->url(), event);
 396     QTreeView::dropEvent(event);
 397 }
 398
 399 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 400 {
 401     QTreeView::paintEvent(event);
 402     if (m_band.show) {
 403         // The following code has been taken from QListView
 404         // and adapted to DolphinDetailsView.
 405         // (C) 1992-2007 Trolltech ASA
 406         QStyleOptionRubberBand opt;
 407         opt.initFrom(this);
 408         opt.shape = QRubberBand::Rectangle;
 409         opt.opaque = false;
 410         opt.rect = elasticBandRect();
 411
 412         QPainter painter(viewport());
 413         painter.save();
 414         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 415         painter.restore();
 416     }
 417 }
 418
 419 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 420 {
 421     // If the Control modifier is pressed, a multiple selection
 422     // is done and DolphinDetailsView::currentChanged() may not
 423     // not change the selection in a custom way.
 424     m_keyPressed = !(event->modifiers() & Qt::ControlModifier);
 425
 426     QTreeView::keyPressEvent(event);
 427     m_dolphinViewController->handleKeyPressEvent(event);
 428 }
 429
 430 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 431 {
 432     QTreeView::keyReleaseEvent(event);
 433     m_keyPressed = false;
 434 }
 435
 436 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 437 {
 438     QTreeView::resizeEvent(event);
 439     if (m_autoResize) {
 440         resizeColumns();
 441     }
 442 }
 443
 444 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 445 {
 446     const int step = m_decorationSize.height();
 447     verticalScrollBar()->setSingleStep(step);
 448     QTreeView::wheelEvent(event);
 449 }
 450
 451 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 452 {
 453     QTreeView::currentChanged(current, previous);
 454     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 455
 456     // Stay consistent with QListView: When changing the current index by key presses,
 457     // also change the selection.
 458     if (m_keyPressed) {
 459         setCurrentIndex(current);
 460     }
 461
 462     // If folders are expanded, the width which is available for editing may have changed
 463     // because it depends on the level of the current item in the folder hierarchy.
 464     adjustMaximumSizeForEditing(current);
 465 }
 466
 467 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 468 {
 469     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 470         // if the mouse is above an item and moved very fast outside the widget,
 471         // no viewportEntered() signal might be emitted although the mouse has been moved
 472         // above the viewport
 473         m_dolphinViewController->emitViewportEntered();
 474     }
 475
 476     return QTreeView::eventFilter(watched, event);
 477 }
 478
 479 QModelIndex DolphinDetailsView::indexAt(const QPoint& point) const
 480 {
 481     // the blank portion of the name column counts as empty space
 482     const QModelIndex index = QTreeView::indexAt(point);
 483     const bool isAboveEmptySpace  = !m_useDefaultIndexAt &&
 484                                     (index.column() == KDirModel::Name) && !visualRect(index).contains(point);
 485     return isAboveEmptySpace ? QModelIndex() : index;
 486 }
 487
 488 QRect DolphinDetailsView::visualRect(const QModelIndex& index) const
 489 {
 490     QRect rect = QTreeView::visualRect(index);
 491     const KFileItem item = m_dolphinViewController->itemForIndex(index);
 492     if (!item.isNull()) {
 493         const int width = DolphinFileItemDelegate::nameColumnWidth(item.text(), viewOptions());
 494         rect.setWidth(width);
 495     }
 496
 497     return rect;
 498 }
 499
 500 void DolphinDetailsView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags command)
 501 {
 502     // We must override setSelection() as Qt calls it internally and when this happens
 503     // we must ensure that the default indexAt() is used.
 504     if (!m_band.show) {
 505         m_useDefaultIndexAt = true;
 506         QTreeView::setSelection(rect, command);
 507         m_useDefaultIndexAt = false;
 508     } else {
 509         // Use our own elastic band selection algorithm
 510         updateElasticBandSelection();
 511     }
 512 }
 513
 514 void DolphinDetailsView::scrollTo(const QModelIndex & index, ScrollHint hint)
 515 {
 516     if (!m_ignoreScrollTo) {
 517         QTreeView::scrollTo(index, hint);
 518     }
 519 }
 520
 521 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 522 {
 523     header()->setSortIndicator(sorting, header()->sortIndicatorOrder());
 524 }
 525
 526 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 527 {
 528     header()->setSortIndicator(header()->sortIndicatorSection(), sortOrder);
 529 }
 530
 531 void DolphinDetailsView::synchronizeSortingState(int column)
 532 {
 533     // The sorting has already been changed in QTreeView if this slot is
 534     // invoked, but Dolphin is not informed about this.
 535     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 536     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 537     m_dolphinViewController->indicateSortingChange(sorting);
 538     m_dolphinViewController->indicateSortOrderChange(sortOrder);
 539 }
 540
 541 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 542 {
 543     if (index.column() == DolphinModel::Name) {
 544         m_dolphinViewController->emitItemEntered(index);
 545     } else {
 546         m_dolphinViewController->emitViewportEntered();
 547     }
 548 }
 549
 550 void DolphinDetailsView::updateElasticBand()
 551 {
 552     if (m_band.show) {
 553         QRect dirtyRegion(elasticBandRect());
 554         const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 555         m_band.destination = viewport()->mapFromGlobal(QCursor::pos()) + scrollPos;
 556         // Going above the (logical) top-left of the view causes complications during selection;
 557         // we may as well prevent it.
 558         if (m_band.destination.y() < 0) {
 559             m_band.destination.setY(0);
 560         }
 561         if (m_band.destination.x() < 0) {
 562             m_band.destination.setX(0);
 563         }
 564         dirtyRegion = dirtyRegion.united(elasticBandRect());
 565         setDirtyRegion(dirtyRegion);
 566     }
 567 }
 568
 569 QRect DolphinDetailsView::elasticBandRect() const
 570 {
 571     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 572
 573     const QPoint topLeft = m_band.origin - scrollPos;
 574     const QPoint bottomRight = m_band.destination - scrollPos;
 575     return QRect(topLeft, bottomRight).normalized();
 576 }
 577
 578 void DolphinDetailsView::setZoomLevel(int level)
 579 {
 580     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 581     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 582
 583     const bool showPreview = m_dolphinViewController->view()->showPreview();
 584     if (showPreview) {
 585         settings->setPreviewSize(size);
 586     } else {
 587         settings->setIconSize(size);
 588     }
 589
 590     updateDecorationSize(showPreview);
 591 }
 592
 593 void DolphinDetailsView::slotShowPreviewChanged()
 594 {
 595     const DolphinView* view = m_dolphinViewController->view();
 596     updateDecorationSize(view->showPreview());
 597 }
 598
 599 void DolphinDetailsView::configureSettings(const QPoint& pos)
 600 {
 601     KMenu popup(this);
 602     popup.addTitle(i18nc("@title:menu", "Columns"));
 603
 604     // add checkbox items for each column
 605     QHeaderView* headerView = header();
 606     const int columns = model()->columnCount();
 607     for (int i = 0; i < columns; ++i) {
 608         const int logicalIndex = headerView->logicalIndex(i);
 609         const QString text = model()->headerData(logicalIndex, Qt::Horizontal).toString();
 610         QAction* action = popup.addAction(text);
 611         action->setCheckable(true);
 612         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 613         action->setData(logicalIndex);
 614         action->setEnabled(logicalIndex != DolphinModel::Name);
 615     }
 616     popup.addSeparator();
 617
 618     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 619     if (activatedAction != 0) {
 620         const bool show = activatedAction->isChecked();
 621         const int columnIndex = activatedAction->data().toInt();
 622
 623         KFileItemDelegate::InformationList list = m_dolphinViewController->view()->additionalInfo();
 624         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 625         if (show) {
 626             Q_ASSERT(!list.contains(info));
 627             list.append(info);
 628         } else {
 629             Q_ASSERT(list.contains(info));
 630             const int index = list.indexOf(info);
 631             list.removeAt(index);
 632         }
 633
 634         m_dolphinViewController->indicateAdditionalInfoChange(list);
 635         setColumnHidden(columnIndex, !show);
 636         resizeColumns();
 637     }
 638 }
 639
 640 void DolphinDetailsView::updateColumnVisibility()
 641 {
 642     QHeaderView* headerView = header();
 643     disconnect(headerView, SIGNAL(sectionMoved(int, int, int)),
 644                this, SLOT(saveColumnPositions()));
 645
 646     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 647     const QList<int> columnPositions = settings->columnPositions();
 648
 649     const KFileItemDelegate::InformationList list = m_dolphinViewController->view()->additionalInfo();
 650     for (int i = DolphinModel::Name; i <= DolphinModel::Version; ++i) {
 651         const KFileItemDelegate::Information info = infoForColumn(i);
 652         const bool hide = !list.contains(info) && (i != DolphinModel::Name);
 653         if (isColumnHidden(i) != hide) {
 654             setColumnHidden(i, hide);
 655         }
 656
 657         const int from = headerView->visualIndex(i);
 658         headerView->moveSection(from, columnPositions[i]);
 659     }
 660
 661     resizeColumns();
 662
 663     connect(headerView, SIGNAL(sectionMoved(int, int, int)),
 664             this, SLOT(saveColumnPositions()));
 665
 666 }
 667
 668 void DolphinDetailsView::saveColumnPositions()
 669 {
 670     QList<int> columnPositions;
 671     for (int i = DolphinModel::Name; i <= DolphinModel::Version; ++i) {
 672         columnPositions.append(header()->visualIndex(i));
 673     }
 674
 675     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 676     settings->setColumnPositions(columnPositions);
 677 }
 678
 679 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 680 {
 681     Q_UNUSED(logicalIndex);
 682     Q_UNUSED(oldSize);
 683     Q_UNUSED(newSize);
 684     // If the user changes the size of the headers, the autoresize feature should be
 685     // turned off. As there is no dedicated interface to find out whether the header
 686     // section has been resized by the user or by a resize event, another approach is used.
 687     // Attention: Take care when changing the if-condition to verify that there is no
 688     // regression in combination with bug 178630 (see fix in comment #8).
 689     if ((QApplication::mouseButtons() & Qt::LeftButton) && header()->underMouse()) {
 690         disableAutoResizing();
 691     }
 692
 693     adjustMaximumSizeForEditing(currentIndex());
 694 }
 695
 696 void DolphinDetailsView::slotActivationChanged(bool active)
 697 {
 698     setAlternatingRowColors(active);
 699 }
 700
 701 void DolphinDetailsView::disableAutoResizing()
 702 {
 703     m_autoResize = false;
 704 }
 705
 706 void DolphinDetailsView::requestActivation()
 707 {
 708     m_dolphinViewController->requestActivation();
 709 }
 710
 711 void DolphinDetailsView::slotGlobalSettingsChanged(int category)
 712 {
 713     Q_UNUSED(category);
 714
 715     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 716     Q_ASSERT(settings != 0);
 717     if (settings->useSystemFont()) {
 718         m_font = KGlobalSettings::generalFont();
 719     }
 720     //Disconnect then reconnect, since the settings have been changed, the connection requirements may have also.
 721     disconnect(this, SIGNAL(clicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 722     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 723     if (KGlobalSettings::singleClick()) {
 724         connect(this, SIGNAL(clicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 725     } else {
 726         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 727     }
 728 }
 729
 730 void DolphinDetailsView::updateElasticBandSelection()
 731 {
 732     if (!m_band.show) {
 733         return;
 734     }
 735
 736     // Ensure the elastic band itself is up-to-date, in
 737     // case we are being called due to e.g. a drag event.
 738     updateElasticBand();
 739
 740     // Clip horizontally to the name column, as some filenames will be
 741     // longer than the column.  We don't clip vertically as origin
 742     // may be above or below the current viewport area.
 743     const int nameColumnX = header()->sectionPosition(DolphinModel::Name);
 744     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 745     QRect selRect = elasticBandRect().normalized();
 746     QRect nameColumnArea(nameColumnX, selRect.y(), nameColumnWidth, selRect.height());
 747     selRect = nameColumnArea.intersect(selRect).normalized();
 748     // Get the last elastic band rectangle, expressed in viewpoint coordinates.
 749     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 750     QRect oldSelRect = QRect(m_band.lastSelectionOrigin - scrollPos, m_band.lastSelectionDestination - scrollPos).normalized();
 751
 752     if (selRect.isNull()) {
 753         selectionModel()->select(m_band.originalSelection, QItemSelectionModel::ClearAndSelect);
 754         m_band.ignoreOldInfo = true;
 755         return;
 756     }
 757
 758     if (!m_band.ignoreOldInfo) {
 759         // Do some quick checks to see if we can rule out the need to
 760         // update the selection.
 761         Q_ASSERT(uniformRowHeights());
 762         QModelIndex dummyIndex = model()->index(0, 0);
 763         if (!dummyIndex.isValid()) {
 764             // No items in the model presumably.
 765             return;
 766         }
 767
 768         // If the elastic band does not cover the same rows as before, we'll
 769         // need to re-check, and also invalidate the old item distances.
 770         const int rowHeight = QTreeView::rowHeight(dummyIndex);
 771         const bool coveringSameRows =
 772             (selRect.top()    / rowHeight == oldSelRect.top()    / rowHeight) &&
 773             (selRect.bottom() / rowHeight == oldSelRect.bottom() / rowHeight);
 774         if (coveringSameRows) {
 775             // Covering the same rows, but have we moved far enough horizontally
 776             // that we might have (de)selected some other items?
 777             const bool itemSelectionChanged =
 778                 ((selRect.left() > oldSelRect.left()) &&
 779                  (selRect.left() > m_band.insideNearestLeftEdge)) ||
 780                 ((selRect.left() < oldSelRect.left()) &&
 781                  (selRect.left() <= m_band.outsideNearestLeftEdge)) ||
 782                 ((selRect.right() < oldSelRect.right()) &&
 783                  (selRect.left() >= m_band.insideNearestRightEdge)) ||
 784                 ((selRect.right() > oldSelRect.right()) &&
 785                  (selRect.right() >= m_band.outsideNearestRightEdge));
 786
 787             if (!itemSelectionChanged) {
 788                 return;
 789             }
 790         }
 791     } else {
 792         // This is the only piece of optimization data that needs to be explicitly
 793         // discarded.
 794         m_band.lastSelectionOrigin = QPoint();
 795         m_band.lastSelectionDestination = QPoint();
 796         oldSelRect = selRect;
 797     }
 798
 799     // Do the selection from scratch. Force a update of the horizontal distances info.
 800     m_band.insideNearestLeftEdge   = nameColumnX + nameColumnWidth + 1;
 801     m_band.insideNearestRightEdge  = nameColumnX - 1;
 802     m_band.outsideNearestLeftEdge  = nameColumnX - 1;
 803     m_band.outsideNearestRightEdge = nameColumnX + nameColumnWidth + 1;
 804
 805     // Include the old selection rect as well, so we can deselect
 806     // items that were inside it but not in the new selRect.
 807     const QRect boundingRect = selRect.united(oldSelRect).normalized();
 808     if (boundingRect.isNull()) {
 809         return;
 810     }
 811
 812     // Get the index of the item in this row in the name column.
 813     // TODO - would this still work if the columns could be re-ordered?
 814     QModelIndex startIndex = QTreeView::indexAt(boundingRect.topLeft());
 815     if (startIndex.parent().isValid()) {
 816         startIndex = startIndex.parent().child(startIndex.row(), KDirModel::Name);
 817     } else {
 818         startIndex = model()->index(startIndex.row(), KDirModel::Name);
 819     }
 820     if (!startIndex.isValid()) {
 821         selectionModel()->select(m_band.originalSelection, QItemSelectionModel::ClearAndSelect);
 822         m_band.ignoreOldInfo = true;
 823         return;
 824     }
 825
 826    // Go through all indexes between the top and bottom of boundingRect, and
 827    // update the selection.
 828    const int verticalCutoff = boundingRect.bottom();
 829    QModelIndex currIndex = startIndex;
 830    QModelIndex lastIndex;
 831    bool allItemsInBoundDone = false;
 832
 833    // Calling selectionModel()->select(...) for each item that needs to be
 834    // toggled is slow as each call emits selectionChanged(...) so store them
 835    // and do the selection toggle in one batch.
 836    QItemSelection itemsToToggle;
 837    // QItemSelection's deal with continuous ranges of indexes better than
 838    // single indexes, so try to portion items that need to be toggled into ranges.
 839    bool formingToggleIndexRange = false;
 840    QModelIndex toggleIndexRangeBegin = QModelIndex();
 841
 842    do {
 843        QRect currIndexRect = visualRect(currIndex);
 844
 845         // Update some optimization info as we go.
 846        const int cr = currIndexRect.right();
 847        const int cl = currIndexRect.left();
 848        const int sl = selRect.left();
 849        const int sr = selRect.right();
 850        // "The right edge of the name is outside of the rect but nearer than m_outsideNearestLeft", etc
 851        if ((cr < sl && cr > m_band.outsideNearestLeftEdge)) {
 852            m_band.outsideNearestLeftEdge = cr;
 853        }
 854        if ((cl > sr && cl < m_band.outsideNearestRightEdge)) {
 855            m_band.outsideNearestRightEdge = cl;
 856        }
 857        if ((cl >= sl && cl <= sr && cl > m_band.insideNearestRightEdge)) {
 858            m_band.insideNearestRightEdge = cl;
 859        }
 860        if ((cr >= sl && cr <= sr && cr < m_band.insideNearestLeftEdge)) {
 861            m_band.insideNearestLeftEdge = cr;
 862        }
 863
 864        bool currentlySelected = selectionModel()->isSelected(currIndex);
 865        bool originallySelected = m_band.originalSelection.contains(currIndex);
 866        bool intersectsSelectedRect = currIndexRect.intersects(selRect);
 867        bool shouldBeSelected = (intersectsSelectedRect && !originallySelected) || (!intersectsSelectedRect && originallySelected);
 868        bool needToToggleItem = (currentlySelected && !shouldBeSelected) || (!currentlySelected && shouldBeSelected);
 869        if (needToToggleItem && !formingToggleIndexRange) {
 870             toggleIndexRangeBegin = currIndex;
 871             formingToggleIndexRange = true;
 872        }
 873
 874        // NOTE: indexBelow actually walks up and down expanded trees for us.
 875        QModelIndex nextIndex = indexBelow(currIndex);
 876        allItemsInBoundDone = !nextIndex.isValid() || currIndexRect.top() > verticalCutoff;
 877
 878        const bool commitToggleIndexRange = formingToggleIndexRange &&
 879                                            (!needToToggleItem ||
 880                                             allItemsInBoundDone ||
 881                                             currIndex.parent() != toggleIndexRangeBegin.parent());
 882        if (commitToggleIndexRange) {
 883            formingToggleIndexRange = false;
 884             // If this is the last item in the bounds and it is also the beginning of a range,
 885             // don't toggle lastIndex - it will already have been dealt with.
 886            if (!allItemsInBoundDone || toggleIndexRangeBegin != currIndex) {
 887                itemsToToggle.select(toggleIndexRangeBegin, lastIndex);
 888            }
 889             // Need to start a new range immediately with currIndex?
 890            if (needToToggleItem) {
 891                toggleIndexRangeBegin = currIndex;
 892                formingToggleIndexRange = true;
 893            }
 894            if (allItemsInBoundDone && needToToggleItem) {
 895                 // Toggle the very last item in the bounds.
 896                itemsToToggle.select(currIndex, currIndex);
 897            }
 898        }
 899
 900        // next item
 901        lastIndex = currIndex;
 902        currIndex = nextIndex;
 903     } while (!allItemsInBoundDone);
 904
 905
 906     selectionModel()->select(itemsToToggle, QItemSelectionModel::Toggle);
 907
 908     m_band.lastSelectionOrigin = m_band.origin;
 909     m_band.lastSelectionDestination = m_band.destination;
 910     m_band.ignoreOldInfo = false;
 911 }
 912
 913 void DolphinDetailsView::setFoldersExpandable(bool expandable)
 914 {
 915     if (!expandable) {
 916         // collapse all expanded folders, as QTreeView::setItemsExpandable(false)
 917         // does not do this task
 918         const int rowCount = model()->rowCount();
 919         for (int row = 0; row < rowCount; ++row) {
 920             setExpanded(model()->index(row, 0), false);
 921         }
 922     }
 923     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 924     settings->setExpandableFolders(expandable);
 925     setRootIsDecorated(expandable);
 926     setItemsExpandable(expandable);
 927
 928     // The width of the space which is available for editing has changed
 929     // because of the (dis)appearance of the expanding toggles
 930     adjustMaximumSizeForEditing(currentIndex());
 931 }
 932
 933 void DolphinDetailsView::slotExpanded(const QModelIndex& index)
 934 {
 935     KFileItem item = m_dolphinViewController->itemForIndex(index);
 936     if (!item.isNull()) {
 937         m_expandedUrls.insert(item.url());
 938     }
 939 }
 940
 941 void DolphinDetailsView::slotCollapsed(const QModelIndex& index)
 942 {
 943     KFileItem item = m_dolphinViewController->itemForIndex(index);
 944     if (!item.isNull()) {
 945         m_expandedUrls.remove(item.url());
 946     }
 947 }
 948
 949 void DolphinDetailsView::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end)
 950 {
 951     removeExpandedIndexes(parent, start, end);
 952     QTreeView::rowsAboutToBeRemoved(parent, start, end);
 953 }
 954
 955 void DolphinDetailsView::removeExpandedIndexes(const QModelIndex& parent, int start, int end)
 956 {
 957     if (m_expandedUrls.isEmpty()) {
 958         return;
 959     }
 960
 961     for (int row = start; row <= end; row++) {
 962         const QModelIndex index = model()->index(row, 0, parent);
 963         if (isExpanded(index)) {
 964             slotCollapsed(index);
 965             removeExpandedIndexes(index, 0, model()->rowCount(index) - 1);
 966         }
 967     }
 968 }
 969
 970 void DolphinDetailsView::updateDecorationSize(bool showPreview)
 971 {
 972     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 973     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 974     setIconSize(QSize(iconSize, iconSize));
 975     m_decorationSize = QSize(iconSize, iconSize);
 976
 977     doItemsLayout();
 978 }
 979
 980 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 981 {
 982     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 983
 984     switch (columnIndex) {
 985     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 986     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 987     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 988     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 989     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 990     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 991     default: break;
 992     }
 993
 994     return info;
 995 }
 996
 997 void DolphinDetailsView::resizeColumns()
 998 {
 999     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
1000     // around 3 seconds for each (!) resize operation when having > 10000 items).
1001     // This gets a problem especially when opening large directories, where several
1002     // resize operations are received for showing the currently available items during
1003     // loading (the application hangs around 20 seconds when loading > 10000 items).
1004
1005     QHeaderView* headerView = header();
1006     QFontMetrics fontMetrics(viewport()->font());
1007
1008     int columnWidth[DolphinModel::Version + 1];
1009     columnWidth[DolphinModel::Size] = fontMetrics.width("00000 Items");
1010     columnWidth[DolphinModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
1011     columnWidth[DolphinModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
1012     columnWidth[DolphinModel::Owner] = fontMetrics.width("xxxxxxxxxx");
1013     columnWidth[DolphinModel::Group] = fontMetrics.width("xxxxxxxxxx");
1014     columnWidth[DolphinModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
1015     columnWidth[DolphinModel::Version] = fontMetrics.width("xxxxxxxx");
1016
1017     int requiredWidth = 0;
1018     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
1019         if (!isColumnHidden(i)) {
1020             columnWidth[i] += 20; // provide a default gap
1021             requiredWidth += columnWidth[i];
1022             headerView->resizeSection(i, columnWidth[i]);
1023         }
1024     }
1025
1026     // resize the name column in a way that the whole available width is used
1027     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
1028
1029     const int minNameWidth = 300;
1030     if (columnWidth[KDirModel::Name] < minNameWidth) {
1031         columnWidth[KDirModel::Name] = minNameWidth;
1032
1033         // It might be possible that the name column width can be
1034         // decreased without clipping any text. For performance
1035         // reasons the exact necessary width for full visible names is
1036         // only checked for up to 200 items:
1037         const int rowCount = model()->rowCount();
1038         if (rowCount > 0 && rowCount < 200) {
1039             const int nameWidth = sizeHintForColumn(DolphinModel::Name);
1040             if (nameWidth + requiredWidth <= viewport()->width()) {
1041                 columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
1042             } else if (nameWidth < minNameWidth) {
1043                 columnWidth[KDirModel::Name] = nameWidth;
1044             }
1045         }
1046     }
1047
1048     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
1049 }
1050
1051 bool DolphinDetailsView::isAboveExpandingToggle(const QPoint& pos) const
1052 {
1053     // QTreeView offers no public API to get the information whether an index has an
1054     // expanding toggle and what boundaries the toggle has. The following approach
1055     // also assumes a toggle for file items.
1056     if (itemsExpandable()) {
1057         const QModelIndex index = QTreeView::indexAt(pos);
1058         if (index.isValid() && (index.column() == KDirModel::Name)) {
1059             QRect rect = visualRect(index);
1060             const int toggleSize = rect.height();
1061             if (isRightToLeft()) {
1062                 rect.moveRight(rect.right());
1063             } else {
1064                 rect.moveLeft(rect.x() - toggleSize);
1065             }
1066             rect.setWidth(toggleSize);
1067
1068             QStyleOption opt;
1069             opt.initFrom(this);
1070             opt.rect = rect;
1071             rect = style()->subElementRect(QStyle::SE_TreeViewDisclosureItem, &opt, this);
1072
1073             return rect.contains(pos);
1074         }
1075     }
1076     return false;
1077 }
1078
1079 void DolphinDetailsView::adjustMaximumSizeForEditing(const QModelIndex& index)
1080 {
1081     // Make sure that the full width of the "Name" column is available for "Rename Inline"
1082     m_extensionsFactory->fileItemDelegate()->setMaximumSize(QTreeView::visualRect(index).size());
1083 }
1084
1085 DolphinDetailsView::ElasticBand::ElasticBand() :
1086     show(false),
1087     origin(),
1088     destination(),
1089     lastSelectionOrigin(),
1090     lastSelectionDestination(),
1091     ignoreOldInfo(true),
1092     outsideNearestLeftEdge(0),
1093     outsideNearestRightEdge(0),
1094     insideNearestLeftEdge(0),
1095     insideNearestRightEdge(0)
1096 {
1097 }
1098
1099 #include "dolphindetailsview.moc"