src/dolphindetailsview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz                                      *
   3  *   peter.penz@gmx.at                                                     *
   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 "dolphinsettings.h"
  26 #include "dolphinsortfilterproxymodel.h"
  27 #include "draganddrophelper.h"
  28 #include "selectionmanager.h"
  29 #include "viewproperties.h"
  30
  31 #include "dolphin_detailsmodesettings.h"
  32 #include "dolphin_generalsettings.h"
  33
  34 #include <kdirmodel.h>
  35 #include <klocale.h>
  36 #include <kmenu.h>
  37
  38 #include <QAbstractProxyModel>
  39 #include <QAction>
  40 #include <QApplication>
  41 #include <QHeaderView>
  42 #include <QRubberBand>
  43 #include <QPainter>
  44 #include <QScrollBar>
  45
  46 DolphinDetailsView::DolphinDetailsView(QWidget* parent, DolphinController* controller) :
  47     QTreeView(parent),
  48         m_autoResize(true),
  49     m_expandingTogglePressed(false),
  50     m_keyPressed(false),
  51     m_controller(controller),
  52     m_selectionManager(0),
  53     m_font(),
  54     m_decorationSize(),
  55     m_showElasticBand(false),
  56     m_elasticBandOrigin(),
  57     m_elasticBandDestination()
  58 {
  59     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  60     Q_ASSERT(settings != 0);
  61     Q_ASSERT(controller != 0);
  62
  63     setLayoutDirection(Qt::LeftToRight);
  64     setAcceptDrops(true);
  65     setSortingEnabled(true);
  66     setUniformRowHeights(true);
  67     setSelectionBehavior(SelectItems);
  68     setDragDropMode(QAbstractItemView::DragDrop);
  69     setDropIndicatorShown(false);
  70     setAlternatingRowColors(true);
  71     setRootIsDecorated(settings->expandableFolders());
  72     setItemsExpandable(settings->expandableFolders());
  73     setEditTriggers(QAbstractItemView::NoEditTriggers);
  74
  75     setMouseTracking(true);
  76
  77     const ViewProperties props(controller->url());
  78     setSortIndicatorSection(props.sorting());
  79     setSortIndicatorOrder(props.sortOrder());
  80
  81     QHeaderView* headerView = header();
  82     connect(headerView, SIGNAL(sectionClicked(int)),
  83             this, SLOT(synchronizeSortingState(int)));
  84     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  85     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  86             this, SLOT(configureColumns(const QPoint&)));
  87     connect(headerView, SIGNAL(sectionResized(int, int, int)),
  88             this, SLOT(slotHeaderSectionResized(int, int, int)));
  89     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
  90             this, SLOT(disableAutoResizing()));
  91
  92     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  93             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  94     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  95             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  96
  97     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  98     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  99     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
 100     // RETURN-key in keyPressEvent().
 101     if (KGlobalSettings::singleClick()) {
 102         connect(this, SIGNAL(clicked(const QModelIndex&)),
 103                 controller, SLOT(triggerItem(const QModelIndex&)));
 104     } else {
 105         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 106                 controller, SLOT(triggerItem(const QModelIndex&)));
 107     }
 108
 109     if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
 110         m_selectionManager = new SelectionManager(this);
 111         connect(m_selectionManager, SIGNAL(selectionChanged()),
 112                 this, SLOT(requestActivation()));
 113         connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
 114                 m_selectionManager, SLOT(reset()));
 115     }
 116
 117     connect(this, SIGNAL(entered(const QModelIndex&)),
 118             this, SLOT(slotEntered(const QModelIndex&)));
 119     connect(this, SIGNAL(viewportEntered()),
 120             controller, SLOT(emitViewportEntered()));
 121     connect(controller, SIGNAL(zoomLevelChanged(int)),
 122             this, SLOT(setZoomLevel(int)));
 123     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged()),
 124             this, SLOT(updateColumnVisibility()));
 125     connect(controller, SIGNAL(activationChanged(bool)),
 126             this, SLOT(slotActivationChanged(bool)));
 127
 128     if (settings->useSystemFont()) {
 129         m_font = KGlobalSettings::generalFont();
 130     } else {
 131         m_font = QFont(settings->fontFamily(),
 132                        settings->fontSize(),
 133                        settings->fontWeight(),
 134                        settings->italicFont());
 135     }
 136
 137     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 138     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 139
 140     updateDecorationSize();
 141
 142     setFocus();
 143     viewport()->installEventFilter(this);
 144
 145     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 146             this, SLOT(updateFont()));
 147 }
 148
 149 DolphinDetailsView::~DolphinDetailsView()
 150 {
 151 }
 152
 153 bool DolphinDetailsView::event(QEvent* event)
 154 {
 155     if (event->type() == QEvent::Polish) {
 156         QHeaderView* headerView = header();
 157         headerView->setResizeMode(QHeaderView::Interactive);
 158         headerView->setMovable(false);
 159
 160         updateColumnVisibility();
 161
 162         hideColumn(DolphinModel::Rating);
 163         hideColumn(DolphinModel::Tags);
 164     } else if (event->type() == QEvent::UpdateRequest) {
 165         // a wheel movement will scroll 4 items
 166         if (model()->rowCount() > 0) {
 167             verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
 168         }
 169     }
 170
 171     return QTreeView::event(event);
 172 }
 173
 174 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 175 {
 176     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 177     viewOptions.font = m_font;
 178     viewOptions.showDecorationSelected = true;
 179     viewOptions.decorationSize = m_decorationSize;
 180     return viewOptions;
 181 }
 182
 183 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 184 {
 185     QTreeView::contextMenuEvent(event);
 186     m_controller->triggerContextMenuRequest(event->pos());
 187 }
 188
 189 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 190 {
 191     m_controller->requestActivation();
 192
 193     const QModelIndex current = currentIndex();
 194     QTreeView::mousePressEvent(event);
 195
 196     m_expandingTogglePressed = false;
 197     const QModelIndex index = indexAt(event->pos());
 198     const bool updateState = index.isValid() &&
 199                              (index.column() == DolphinModel::Name) &&
 200                              (event->button() == Qt::LeftButton);
 201     if (updateState) {
 202         // TODO: See comment in DolphinIconsView::mousePressEvent(). Only update
 203         // the state if no expanding/collapsing area has been hit:
 204         const QRect rect = visualRect(index);
 205         if (event->pos().x() >= rect.x() + indentation()) {
 206             setState(QAbstractItemView::DraggingState);
 207         } else {
 208             m_expandingTogglePressed = true;
 209         }
 210     }
 211
 212     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 213         if (QApplication::mouseButtons() & Qt::MidButton) {
 214             m_controller->replaceUrlByClipboard();
 215         }
 216
 217         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 218         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 219             clearSelection();
 220         }
 221
 222         // restore the current index, other columns are handled as viewport area
 223         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 224     }
 225
 226     if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 227         m_showElasticBand = true;
 228
 229         const QPoint pos(contentsPos());
 230         m_elasticBandOrigin = event->pos();
 231         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 232         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 233         m_elasticBandDestination = event->pos();
 234     }
 235 }
 236
 237 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 238 {
 239     if (m_showElasticBand) {
 240         const QPoint mousePos = event->pos();
 241         const QModelIndex index = indexAt(mousePos);
 242         if (!index.isValid()) {
 243             // the destination of the selection rectangle is above the viewport. In this
 244             // case QTreeView does no selection at all, which is not the wanted behavior
 245             // in Dolphin -> select all items within the elastic band rectangle
 246             clearSelection();
 247
 248             const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 249             QRect selRect = QRect(m_elasticBandOrigin, m_elasticBandDestination).normalized();
 250             const QRect nameColumnsRect(0, 0, nameColumnWidth, viewport()->height());
 251             selRect = nameColumnsRect.intersected(selRect);
 252
 253             setSelection(selRect, QItemSelectionModel::Select);
 254         }
 255
 256         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 257         // as the Qt-issue #199631 has been fixed.
 258         // QTreeView::mouseMoveEvent(event);
 259         QAbstractItemView::mouseMoveEvent(event);
 260         updateElasticBand();
 261     } else {
 262         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 263         // as the Qt-issue #199631 has been fixed.
 264         // QTreeView::mouseMoveEvent(event);
 265         QAbstractItemView::mouseMoveEvent(event);
 266     }
 267
 268     if (m_expandingTogglePressed) {
 269         // Per default QTreeView starts either a selection or a drag operation when dragging
 270         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 271         // Turn off this behavior in Dolphin to stay predictable:
 272         clearSelection();
 273         setState(QAbstractItemView::NoState);
 274     }
 275 }
 276
 277 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 278 {
 279     const QModelIndex index = indexAt(event->pos());
 280     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 281         QTreeView::mouseReleaseEvent(event);
 282     } else {
 283         // don't change the current index if the cursor is released
 284         // above any other column than the name column, as the other
 285         // columns act as viewport
 286         const QModelIndex current = currentIndex();
 287         QTreeView::mouseReleaseEvent(event);
 288         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 289     }
 290
 291     m_expandingTogglePressed = false;
 292     if (m_showElasticBand) {
 293         updateElasticBand();
 294         m_showElasticBand = false;
 295     }
 296 }
 297
 298 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 299 {
 300     DragAndDropHelper::startDrag(this, supportedActions);
 301     m_showElasticBand = false;
 302 }
 303
 304 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 305 {
 306     if (event->mimeData()->hasUrls()) {
 307         event->acceptProposedAction();
 308     }
 309
 310     if (m_showElasticBand) {
 311         updateElasticBand();
 312         m_showElasticBand = false;
 313     }
 314 }
 315
 316 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 317 {
 318     QTreeView::dragLeaveEvent(event);
 319     setDirtyRegion(m_dropRect);
 320 }
 321
 322 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 323 {
 324     QTreeView::dragMoveEvent(event);
 325
 326     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 327     setDirtyRegion(m_dropRect);
 328     const QModelIndex index = indexAt(event->pos());
 329     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 330         const KFileItem item = m_controller->itemForIndex(index);
 331         if (!item.isNull() && item.isDir()) {
 332             m_dropRect = visualRect(index);
 333         } else {
 334             m_dropRect.setSize(QSize()); // set as invalid
 335         }
 336         setDirtyRegion(m_dropRect);
 337     }
 338
 339     if (event->mimeData()->hasUrls()) {
 340         // accept url drops, independently from the destination item
 341         event->acceptProposedAction();
 342     }
 343 }
 344
 345 void DolphinDetailsView::dropEvent(QDropEvent* event)
 346 {
 347     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 348     if (!urls.isEmpty()) {
 349         event->acceptProposedAction();
 350         const QModelIndex index = indexAt(event->pos());
 351         KFileItem item;
 352         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 353             item = m_controller->itemForIndex(index);
 354         }
 355         m_controller->indicateDroppedUrls(urls,
 356                                           m_controller->url(),
 357                                           item);
 358     }
 359     QTreeView::dropEvent(event);
 360 }
 361
 362 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 363 {
 364     QTreeView::paintEvent(event);
 365     if (m_showElasticBand) {
 366         // The following code has been taken from QListView
 367         // and adapted to DolphinDetailsView.
 368         // (C) 1992-2007 Trolltech ASA
 369         QStyleOptionRubberBand opt;
 370         opt.initFrom(this);
 371         opt.shape = QRubberBand::Rectangle;
 372         opt.opaque = false;
 373         opt.rect = elasticBandRect();
 374
 375         QPainter painter(viewport());
 376         painter.save();
 377         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 378         painter.restore();
 379     }
 380 }
 381
 382 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 383 {
 384     // If the Control modifier is pressed, a multiple selection
 385     // is done and DolphinDetailsView::currentChanged() may not
 386     // not change the selection in a custom way.
 387     m_keyPressed = !(event->modifiers() & Qt::ControlModifier);
 388
 389     QTreeView::keyPressEvent(event);
 390     m_controller->handleKeyPressEvent(event);
 391 }
 392
 393 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 394 {
 395     QTreeView::keyReleaseEvent(event);
 396     m_keyPressed = false;
 397 }
 398
 399 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 400 {
 401     if (m_autoResize) {
 402         resizeColumns();
 403     }
 404     QTreeView::resizeEvent(event);
 405 }
 406
 407 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 408 {
 409     if (m_selectionManager != 0) {
 410         m_selectionManager->reset();
 411     }
 412
 413     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 414     if (event->modifiers() & Qt::ControlModifier) {
 415         event->ignore();
 416         return;
 417     }
 418
 419     QTreeView::wheelEvent(event);
 420 }
 421
 422 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 423 {
 424     QTreeView::currentChanged(current, previous);
 425
 426     // Stay consistent with QListView: When changing the current index by key presses,
 427     // also change the selection.
 428     if (m_keyPressed) {
 429         selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 430     }
 431 }
 432
 433 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 434 {
 435     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 436         // if the mouse is above an item and moved very fast outside the widget,
 437         // no viewportEntered() signal might be emitted although the mouse has been moved
 438         // above the viewport
 439         m_controller->emitViewportEntered();
 440     }
 441
 442     return QTreeView::eventFilter(watched, event);
 443 }
 444
 445 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 446 {
 447     QHeaderView* headerView = header();
 448     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 449 }
 450
 451 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 452 {
 453     QHeaderView* headerView = header();
 454     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 455 }
 456
 457 void DolphinDetailsView::synchronizeSortingState(int column)
 458 {
 459     // The sorting has already been changed in QTreeView if this slot is
 460     // invoked, but Dolphin is not informed about this.
 461     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 462     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 463     m_controller->indicateSortingChange(sorting);
 464     m_controller->indicateSortOrderChange(sortOrder);
 465 }
 466
 467 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 468 {
 469     if (index.column() == DolphinModel::Name) {
 470         m_controller->emitItemEntered(index);
 471     } else {
 472         m_controller->emitViewportEntered();
 473     }
 474 }
 475
 476 void DolphinDetailsView::updateElasticBand()
 477 {
 478     if (m_showElasticBand) {
 479         QRect dirtyRegion(elasticBandRect());
 480         m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 481         dirtyRegion = dirtyRegion.united(elasticBandRect());
 482         setDirtyRegion(dirtyRegion);
 483     }
 484 }
 485
 486 QRect DolphinDetailsView::elasticBandRect() const
 487 {
 488     const QPoint pos(contentsPos());
 489     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 490     return QRect(topLeft, m_elasticBandDestination).normalized();
 491 }
 492
 493 void DolphinDetailsView::setZoomLevel(int level)
 494 {
 495     const int size = DolphinController::iconSizeForZoomLevel(level);
 496     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 497     settings->setIconSize(size);
 498
 499     updateDecorationSize();
 500 }
 501
 502 void DolphinDetailsView::configureColumns(const QPoint& pos)
 503 {
 504     KMenu popup(this);
 505     popup.addTitle(i18nc("@title:menu", "Columns"));
 506
 507     QHeaderView* headerView = header();
 508     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 509         const int logicalIndex = headerView->logicalIndex(i);
 510         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 511         QAction* action = popup.addAction(text);
 512         action->setCheckable(true);
 513         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 514         action->setData(i);
 515     }
 516
 517     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 518     if (activatedAction != 0) {
 519         const bool show = activatedAction->isChecked();
 520         const int columnIndex = activatedAction->data().toInt();
 521
 522         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 523         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 524         if (show) {
 525             Q_ASSERT(!list.contains(info));
 526             list.append(info);
 527         } else {
 528             Q_ASSERT(list.contains(info));
 529             const int index = list.indexOf(info);
 530             list.removeAt(index);
 531         }
 532
 533         m_controller->indicateAdditionalInfoChange(list);
 534         setColumnHidden(columnIndex, !show);
 535     }
 536 }
 537
 538 void DolphinDetailsView::updateColumnVisibility()
 539 {
 540     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 541     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 542         const KFileItemDelegate::Information info = infoForColumn(i);
 543         const bool hide = !list.contains(info);
 544         if (isColumnHidden(i) != hide) {
 545             setColumnHidden(i, hide);
 546         }
 547     }
 548
 549     resizeColumns();
 550 }
 551
 552 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 553 {
 554     Q_UNUSED(logicalIndex);
 555     Q_UNUSED(oldSize);
 556     Q_UNUSED(newSize);
 557     if (QApplication::mouseButtons() & Qt::LeftButton) {
 558         disableAutoResizing();
 559     }
 560 }
 561
 562 void DolphinDetailsView::slotActivationChanged(bool active)
 563 {
 564     setAlternatingRowColors(active);
 565 }
 566
 567 void DolphinDetailsView::disableAutoResizing()
 568 {
 569     m_autoResize = false;
 570 }
 571
 572 void DolphinDetailsView::requestActivation()
 573 {
 574     m_controller->requestActivation();
 575 }
 576
 577 void DolphinDetailsView::updateFont()
 578 {
 579     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 580     Q_ASSERT(settings != 0);
 581
 582     if (settings->useSystemFont()) {
 583         m_font = KGlobalSettings::generalFont();
 584     }
 585 }
 586
 587 void DolphinDetailsView::updateDecorationSize()
 588 {
 589     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 590     const int iconSize = settings->iconSize();
 591     setIconSize(QSize(iconSize, iconSize));
 592     m_decorationSize = QSize(iconSize, iconSize);
 593
 594     if (m_selectionManager != 0) {
 595         m_selectionManager->reset();
 596     }
 597
 598     doItemsLayout();
 599 }
 600
 601 QPoint DolphinDetailsView::contentsPos() const
 602 {
 603     // implementation note: the horizonal position is ignored currently, as no
 604     // horizontal scrolling is done anyway during a selection
 605     const QScrollBar* scrollbar = verticalScrollBar();
 606     Q_ASSERT(scrollbar != 0);
 607
 608     const int maxHeight = maximumViewportSize().height();
 609     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 610     const int visibleHeight = model()->rowCount() + 1 - height;
 611     if (visibleHeight <= 0) {
 612         return QPoint(0, 0);
 613     }
 614
 615     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 616     return QPoint(0, y);
 617 }
 618
 619 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 620 {
 621     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 622
 623     switch (columnIndex) {
 624     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 625     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 626     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 627     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 628     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 629     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 630     default: break;
 631     }
 632
 633     return info;
 634 }
 635
 636 void DolphinDetailsView::resizeColumns()
 637 {
 638     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 639     // around 3 seconds for each (!) resize operation when having > 10000 items).
 640     // This gets a problem especially when opening large directories, where several
 641     // resize operations are received for showing the currently available items during
 642     // loading (the application hangs around 20 seconds when loading > 10000 items).
 643
 644     QHeaderView* headerView = header();
 645     QFontMetrics fontMetrics(viewport()->font());
 646
 647     int columnWidth[KDirModel::ColumnCount];
 648     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 649     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 650     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 651     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 652     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 653     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 654
 655     int requiredWidth = 0;
 656     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 657         if (!isColumnHidden(i)) {
 658             columnWidth[i] += 20; // provide a default gap
 659             requiredWidth += columnWidth[i];
 660             headerView->resizeSection(i, columnWidth[i]);
 661         }
 662     }
 663
 664     // resize the name column in a way that the whole available width is used
 665     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 666     if (columnWidth[KDirModel::Name] < 120) {
 667         columnWidth[KDirModel::Name] = 120;
 668     }
 669     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 670 }
 671
 672 #include "dolphindetailsview.moc"