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 "viewproperties.h"
  29
  30 #include "dolphin_detailsmodesettings.h"
  31
  32 #include <kdirmodel.h>
  33 #include <klocale.h>
  34 #include <kmenu.h>
  35
  36 #include <QAbstractProxyModel>
  37 #include <QAction>
  38 #include <QApplication>
  39 #include <QHeaderView>
  40 #include <QRubberBand>
  41 #include <QPainter>
  42 #include <QScrollBar>
  43
  44 DolphinDetailsView::DolphinDetailsView(QWidget* parent, DolphinController* controller) :
  45     QTreeView(parent),
  46     m_controller(controller),
  47     m_font(),
  48     m_decorationSize(),
  49     m_clearAdditionalInfo(false),
  50     m_dragging(false),
  51     m_showElasticBand(false),
  52     m_elasticBandOrigin(),
  53     m_elasticBandDestination()
  54 {
  55     Q_ASSERT(controller != 0);
  56
  57     setAcceptDrops(true);
  58     setRootIsDecorated(false);
  59     setSortingEnabled(true);
  60     setUniformRowHeights(true);
  61     setSelectionBehavior(SelectItems);
  62     setDragDropMode(QAbstractItemView::DragDrop);
  63     setDropIndicatorShown(false);
  64     setAlternatingRowColors(true);
  65     setItemsExpandable(false);
  66
  67     setMouseTracking(true);
  68     viewport()->setAttribute(Qt::WA_Hover);
  69
  70     const ViewProperties props(controller->url());
  71     setSortIndicatorSection(props.sorting());
  72     setSortIndicatorOrder(props.sortOrder());
  73
  74     QHeaderView* headerView = header();
  75     connect(headerView, SIGNAL(sectionClicked(int)),
  76             this, SLOT(synchronizeSortingState(int)));
  77     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  78     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  79             this, SLOT(configureColumns(const QPoint&)));
  80
  81     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  82             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  83     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  84             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  85
  86     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  87     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  88     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  89     // RETURN-key in keyPressEvent().
  90     if (KGlobalSettings::singleClick()) {
  91         connect(this, SIGNAL(clicked(const QModelIndex&)),
  92                 this, SLOT(triggerItem(const QModelIndex&)));
  93     } else {
  94         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  95                 this, SLOT(triggerItem(const QModelIndex&)));
  96     }
  97     connect(this, SIGNAL(entered(const QModelIndex&)),
  98             this, SLOT(slotEntered(const QModelIndex&)));
  99     connect(this, SIGNAL(viewportEntered()),
 100             controller, SLOT(emitViewportEntered()));
 101     connect(controller, SIGNAL(zoomIn()),
 102             this, SLOT(zoomIn()));
 103     connect(controller, SIGNAL(zoomOut()),
 104             this, SLOT(zoomOut()));
 105     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged(const KFileItemDelegate::InformationList&)),
 106             this, SLOT(updateColumnVisibility()));
 107
 108     // apply the details mode settings to the widget
 109     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 110     Q_ASSERT(settings != 0);
 111
 112     m_font = QFont(settings->fontFamily(), settings->fontSize());
 113
 114 // TODO: Remove this check when 4.3.2 is released and KDE requires it... this
 115 //       check avoids a division by zero happening on versions before 4.3.1.
 116 //       Right now KDE in theory can be shipped with Qt 4.3.0 and above.
 117 //       ereslibre
 118 #if (QT_VERSION >= QT_VERSION_CHECK(4, 3, 2) || defined(QT_KDE_QT_COPY))
 119     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 120     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 121 #endif
 122
 123     updateDecorationSize();
 124
 125     setFocus();
 126 }
 127
 128 DolphinDetailsView::~DolphinDetailsView()
 129 {
 130 }
 131
 132 bool DolphinDetailsView::event(QEvent* event)
 133 {
 134     if (event->type() == QEvent::Polish) {
 135         QHeaderView* headerView = header();
 136         headerView->setResizeMode(QHeaderView::Interactive);
 137         headerView->setMovable(false);
 138
 139         updateColumnVisibility();
 140
 141         hideColumn(DolphinModel::Rating);
 142         hideColumn(DolphinModel::Tags);
 143     }
 144 // TODO: Remove this check when 4.3.2 is released and KDE requires it... this
 145 //       check avoids a division by zero happening on versions before 4.3.1.
 146 //       Right now KDE in theory can be shipped with Qt 4.3.0 and above.
 147 //       ereslibre
 148 #if (QT_VERSION >= QT_VERSION_CHECK(4, 3, 2) || defined(QT_KDE_QT_COPY))
 149     else if (event->type() == QEvent::UpdateRequest) {
 150         // a wheel movement will scroll 4 items
 151         if (model()->rowCount() > 0) {
 152             verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
 153         }
 154     }
 155 #endif
 156
 157     return QTreeView::event(event);
 158 }
 159
 160 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 161 {
 162     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 163     viewOptions.font = m_font;
 164     viewOptions.showDecorationSelected = true;
 165     viewOptions.decorationSize = m_decorationSize;
 166     return viewOptions;
 167 }
 168
 169 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 170 {
 171     QTreeView::contextMenuEvent(event);
 172     m_controller->triggerContextMenuRequest(event->pos());
 173 }
 174
 175 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 176 {
 177     m_controller->requestActivation();
 178
 179     QTreeView::mousePressEvent(event);
 180
 181     const QModelIndex index = indexAt(event->pos());
 182     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 183         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 184         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 185             clearSelection();
 186         }
 187     }
 188
 189     if (event->button() == Qt::LeftButton) {
 190         m_showElasticBand = true;
 191
 192         const QPoint pos(contentsPos());
 193         m_elasticBandOrigin = event->pos();
 194         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 195         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 196         m_elasticBandDestination = event->pos();
 197     }
 198 }
 199
 200 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 201 {
 202     if (m_showElasticBand) {
 203         const QPoint mousePos = event->pos();
 204         const QModelIndex index = indexAt(mousePos);
 205         if (!index.isValid()) {
 206             // the destination of the selection rectangle is above the viewport. In this
 207             // case QTreeView does no selection at all, which is not the wanted behavior
 208             // in Dolphin -> select all items within the elastic band rectangle
 209             clearSelection();
 210
 211             const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 212             QRect selRect = QRect(m_elasticBandOrigin, m_elasticBandDestination).normalized();
 213             const QRect nameColumnsRect(0, 0, nameColumnWidth, viewport()->height());
 214             selRect = nameColumnsRect.intersected(selRect);
 215
 216             setSelection(selRect, QItemSelectionModel::Select);
 217         }
 218
 219         QTreeView::mouseMoveEvent(event);
 220         updateElasticBand();
 221     } else {
 222         QTreeView::mouseMoveEvent(event);
 223     }
 224 }
 225
 226 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 227 {
 228     QTreeView::mouseReleaseEvent(event);
 229     if (m_showElasticBand) {
 230         updateElasticBand();
 231         m_showElasticBand = false;
 232     }
 233 }
 234
 235 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 236 {
 237     DragAndDropHelper::startDrag(this, supportedActions);
 238 }
 239
 240 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 241 {
 242     if (event->mimeData()->hasUrls()) {
 243         event->acceptProposedAction();
 244     }
 245
 246     if (m_showElasticBand) {
 247         updateElasticBand();
 248         m_showElasticBand = false;
 249     }
 250     m_dragging = true;
 251 }
 252
 253 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 254 {
 255     QTreeView::dragLeaveEvent(event);
 256
 257     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 258     m_dragging = false;
 259     setDirtyRegion(m_dropRect);
 260 }
 261
 262 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 263 {
 264     QTreeView::dragMoveEvent(event);
 265
 266     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 267     setDirtyRegion(m_dropRect);
 268     const QModelIndex index = indexAt(event->pos());
 269     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 270         m_dragging = false;
 271     } else {
 272         m_dragging = true;
 273         const KFileItem item = itemForIndex(index);
 274         if (!item.isNull() && item.isDir()) {
 275             m_dropRect = visualRect(index);
 276         } else {
 277             m_dropRect.setSize(QSize()); // set as invalid
 278         }
 279         setDirtyRegion(m_dropRect);
 280     }
 281
 282     if (event->mimeData()->hasUrls()) {
 283         // accept url drops, independently from the destination item
 284         event->acceptProposedAction();
 285     }
 286 }
 287
 288 void DolphinDetailsView::dropEvent(QDropEvent* event)
 289 {
 290     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 291     if (!urls.isEmpty()) {
 292         event->acceptProposedAction();
 293         const QModelIndex index = indexAt(event->pos());
 294         KFileItem item;
 295         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 296             item = itemForIndex(index);
 297         }
 298         m_controller->indicateDroppedUrls(urls,
 299                                           m_controller->url(),
 300                                           item);
 301     }
 302     QTreeView::dropEvent(event);
 303     m_dragging = false;
 304 }
 305
 306 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 307 {
 308     QTreeView::paintEvent(event);
 309     if (m_showElasticBand) {
 310         // The following code has been taken from QListView
 311         // and adapted to DolphinDetailsView.
 312         // (C) 1992-2007 Trolltech ASA
 313         QStyleOptionRubberBand opt;
 314         opt.initFrom(this);
 315         opt.shape = QRubberBand::Rectangle;
 316         opt.opaque = false;
 317         opt.rect = elasticBandRect();
 318
 319         QPainter painter(viewport());
 320         painter.save();
 321         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 322         painter.restore();
 323     }
 324
 325     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 326     if (m_dragging) {
 327         const QBrush& brush = viewOptions().palette.brush(QPalette::Normal, QPalette::Highlight);
 328         DragAndDropHelper::drawHoverIndication(this, m_dropRect, brush);
 329     }
 330 }
 331
 332 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 333 {
 334     QTreeView::keyPressEvent(event);
 335
 336     const QItemSelectionModel* selModel = selectionModel();
 337     const QModelIndex currentIndex = selModel->currentIndex();
 338     const bool trigger = currentIndex.isValid()
 339                          && (event->key() == Qt::Key_Return)
 340                          && (selModel->selectedIndexes().count() <= 1);
 341     if (trigger) {
 342         triggerItem(currentIndex);
 343     }
 344 }
 345
 346 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 347 {
 348     QTreeView::resizeEvent(event);
 349
 350     // TODO: There seems to be no easy way to find out whether the resize event
 351     // has been triggered because of resizing the window or by adjusting the column-width
 352     // by a left mouse-click (the columns should only be resized automatically when the window
 353     // size is adjusted). The following workaround works well, but it should be
 354     // considered solving this in a more transparent way.
 355     if (!(QApplication::mouseButtons() & Qt::LeftButton)) {
 356         resizeColumns();
 357     }
 358 }
 359
 360 void DolphinDetailsView::closeEvent(QCloseEvent* event)
 361 {
 362     if (m_clearAdditionalInfo) {
 363         disconnect(m_controller->dolphinView(), SIGNAL(additionalInfoChanged(const KFileItemDelegate::InformationList&)),
 364                 this, SLOT(updateColumnVisibility()));
 365
 366         KFileItemDelegate::InformationList info;
 367         info.append(KFileItemDelegate::NoInformation);
 368         m_controller->indicateAdditionalInfoChange(info);
 369         m_clearAdditionalInfo = false;
 370     }
 371     QTreeView::closeEvent(event);
 372 }
 373
 374 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 375 {
 376     QHeaderView* headerView = header();
 377     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 378 }
 379
 380 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 381 {
 382     QHeaderView* headerView = header();
 383     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 384 }
 385
 386 void DolphinDetailsView::synchronizeSortingState(int column)
 387 {
 388     // The sorting has already been changed in QTreeView if this slot is
 389     // invoked, but Dolphin is not informed about this.
 390     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 391     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 392     m_controller->indicateSortingChange(sorting);
 393     m_controller->indicateSortOrderChange(sortOrder);
 394 }
 395
 396 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 397 {
 398     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 399     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 400     if (pos.x() < nameColumnWidth) {
 401         m_controller->emitItemEntered(itemForIndex(index));
 402     }
 403     else {
 404         m_controller->emitViewportEntered();
 405     }
 406 }
 407
 408 void DolphinDetailsView::updateElasticBand()
 409 {
 410     if (m_showElasticBand) {
 411         QRect dirtyRegion(elasticBandRect());
 412         m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 413         dirtyRegion = dirtyRegion.united(elasticBandRect());
 414         setDirtyRegion(dirtyRegion);
 415     }
 416 }
 417
 418 QRect DolphinDetailsView::elasticBandRect() const
 419 {
 420     const QPoint pos(contentsPos());
 421     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 422     return QRect(topLeft, m_elasticBandDestination).normalized();
 423 }
 424
 425 void DolphinDetailsView::zoomIn()
 426 {
 427     if (isZoomInPossible()) {
 428         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 429         switch (settings->iconSize()) {
 430         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 431         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 432         default: Q_ASSERT(false); break;
 433         }
 434         updateDecorationSize();
 435     }
 436 }
 437
 438 void DolphinDetailsView::zoomOut()
 439 {
 440     if (isZoomOutPossible()) {
 441         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 442         switch (settings->iconSize()) {
 443         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 444         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 445         default: Q_ASSERT(false); break;
 446         }
 447         updateDecorationSize();
 448     }
 449 }
 450
 451 void DolphinDetailsView::triggerItem(const QModelIndex& index)
 452 {
 453     const KFileItem item = itemForIndex(index);
 454     if (index.isValid() && (index.column() == KDirModel::Name)) {
 455         m_controller->triggerItem(item);
 456     } else {
 457         clearSelection();
 458         m_controller->emitItemEntered(item);
 459     }
 460 }
 461
 462 void DolphinDetailsView::configureColumns(const QPoint& pos)
 463 {
 464     KMenu popup(this);
 465     popup.addTitle(i18nc("@title:menu", "Columns"));
 466
 467     QHeaderView* headerView = header();
 468     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 469         const int logicalIndex = headerView->logicalIndex(i);
 470         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 471         QAction* action = popup.addAction(text);
 472         action->setCheckable(true);
 473         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 474         action->setData(i);
 475     }
 476
 477     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 478     if (activatedAction != 0) {
 479         const bool show = activatedAction->isChecked();
 480         const int columnIndex = activatedAction->data().toInt();
 481
 482         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 483         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 484         if (show) {
 485             Q_ASSERT(!list.contains(info));
 486             list.append(info);
 487         } else {
 488             Q_ASSERT(list.contains(info));
 489             const int index = list.indexOf(info);
 490             list.removeAt(index);
 491         }
 492
 493         m_controller->indicateAdditionalInfoChange(list);
 494         setColumnHidden(columnIndex, !show);
 495     }
 496 }
 497
 498 void DolphinDetailsView::updateColumnVisibility()
 499 {
 500     KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 501     const bool useDefaultColumns = !isVisible() &&
 502                                    (list.isEmpty() ||
 503                                     list.contains(KFileItemDelegate::NoInformation));
 504     if (useDefaultColumns) {
 505         // Using the details view without any additional information (-> additional column)
 506         // makes no sense and leads to a usability problem as no viewport area is available
 507         // anymore. Hence as fallback provide at least a size and date column.
 508         list.clear();
 509         list.append(KFileItemDelegate::Size);
 510         list.append(KFileItemDelegate::ModificationTime);
 511         m_controller->indicateAdditionalInfoChange(list);
 512         m_clearAdditionalInfo = true;
 513     }
 514
 515     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 516         const KFileItemDelegate::Information info = infoForColumn(i);
 517         const bool hide = !list.contains(info);
 518         if (isColumnHidden(i) != hide) {
 519             setColumnHidden(i, hide);
 520             m_clearAdditionalInfo = false;
 521         }
 522     }
 523
 524     resizeColumns();
 525 }
 526
 527 bool DolphinDetailsView::isZoomInPossible() const
 528 {
 529     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 530     return settings->iconSize() < KIconLoader::SizeLarge;
 531 }
 532
 533 bool DolphinDetailsView::isZoomOutPossible() const
 534 {
 535     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 536     return settings->iconSize() > KIconLoader::SizeSmall;
 537 }
 538
 539 void DolphinDetailsView::updateDecorationSize()
 540 {
 541     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 542     const int iconSize = settings->iconSize();
 543     m_decorationSize = QSize(iconSize, iconSize);
 544
 545     m_controller->setZoomInPossible(isZoomInPossible());
 546     m_controller->setZoomOutPossible(isZoomOutPossible());
 547
 548     doItemsLayout();
 549 }
 550
 551 QPoint DolphinDetailsView::contentsPos() const
 552 {
 553     // implementation note: the horizonal position is ignored currently, as no
 554     // horizontal scrolling is done anyway during a selection
 555     const QScrollBar* scrollbar = verticalScrollBar();
 556     Q_ASSERT(scrollbar != 0);
 557
 558     const int maxHeight = maximumViewportSize().height();
 559     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 560     const int visibleHeight = model()->rowCount() + 1 - height;
 561     if (visibleHeight <= 0) {
 562         return QPoint(0, 0);
 563     }
 564
 565     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 566     return QPoint(0, y);
 567 }
 568
 569 KFileItem DolphinDetailsView::itemForIndex(const QModelIndex& index) const
 570 {
 571     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(model());
 572     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 573     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 574     return dirModel->itemForIndex(dirIndex);
 575 }
 576
 577 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 578 {
 579     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 580
 581     switch (columnIndex) {
 582     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 583     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 584     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 585     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 586     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 587     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 588     default: break;
 589     }
 590
 591     return info;
 592 }
 593
 594 void DolphinDetailsView::resizeColumns()
 595 {
 596     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 597     // around 3 seconds for each (!) resize operation when having > 10000 items).
 598     // This gets a problem especially when opening large directories, where several
 599     // resize operations are received for showing the currently available items during
 600     // loading (the application hangs around 20 seconds when loading > 10000 items).
 601
 602     QHeaderView* headerView = header();
 603     QFontMetrics fontMetrics(viewport()->font());
 604
 605     int columnWidth[KDirModel::ColumnCount];
 606     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 607     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 608     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 609     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 610     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 611     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 612
 613     int requiredWidth = 0;
 614     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 615         if (!isColumnHidden(i)) {
 616             columnWidth[i] += 20; // provide a default gap
 617             requiredWidth += columnWidth[i];
 618             headerView->resizeSection(i, columnWidth[i]);
 619         }
 620     }
 621
 622     // resize the name column in a way that the whole available width is used
 623     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 624     if (columnWidth[KDirModel::Name] < 120) {
 625         columnWidth[KDirModel::Name] = 120;
 626     }
 627     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 628 }
 629
 630 #include "dolphindetailsview.moc"