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             if (mousePos.x() < header()->sectionSize(DolphinModel::Name)) {
 211                 setSelection(QRect(m_elasticBandOrigin, m_elasticBandDestination),
 212                              QItemSelectionModel::Select);
 213             }
 214         }
 215
 216         QTreeView::mouseMoveEvent(event);
 217         updateElasticBand();
 218     } else {
 219         QTreeView::mouseMoveEvent(event);
 220     }
 221 }
 222
 223 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 224 {
 225     QTreeView::mouseReleaseEvent(event);
 226     if (m_showElasticBand) {
 227         updateElasticBand();
 228         m_showElasticBand = false;
 229     }
 230 }
 231
 232 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 233 {
 234     DragAndDropHelper::startDrag(this, supportedActions);
 235 }
 236
 237 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 238 {
 239     if (event->mimeData()->hasUrls()) {
 240         event->acceptProposedAction();
 241     }
 242
 243     if (m_showElasticBand) {
 244         updateElasticBand();
 245         m_showElasticBand = false;
 246     }
 247     m_dragging = true;
 248 }
 249
 250 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 251 {
 252     QTreeView::dragLeaveEvent(event);
 253
 254     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 255     m_dragging = false;
 256     setDirtyRegion(m_dropRect);
 257 }
 258
 259 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 260 {
 261     QTreeView::dragMoveEvent(event);
 262
 263     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 264     setDirtyRegion(m_dropRect);
 265     const QModelIndex index = indexAt(event->pos());
 266     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 267         m_dragging = false;
 268     } else {
 269         m_dragging = true;
 270         const KFileItem item = itemForIndex(index);
 271         if (!item.isNull() && item.isDir()) {
 272             m_dropRect = visualRect(index);
 273         } else {
 274             m_dropRect.setSize(QSize()); // set as invalid
 275         }
 276         setDirtyRegion(m_dropRect);
 277     }
 278 }
 279
 280 void DolphinDetailsView::dropEvent(QDropEvent* event)
 281 {
 282     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 283     if (!urls.isEmpty()) {
 284         event->acceptProposedAction();
 285         const QModelIndex index = indexAt(event->pos());
 286         KFileItem item;
 287         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 288             item = itemForIndex(index);
 289         }
 290         m_controller->indicateDroppedUrls(urls,
 291                                           m_controller->url(),
 292                                           item);
 293     }
 294     QTreeView::dropEvent(event);
 295     m_dragging = false;
 296 }
 297
 298 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 299 {
 300     QTreeView::paintEvent(event);
 301     if (m_showElasticBand) {
 302         // The following code has been taken from QListView
 303         // and adapted to DolphinDetailsView.
 304         // (C) 1992-2007 Trolltech ASA
 305         QStyleOptionRubberBand opt;
 306         opt.initFrom(this);
 307         opt.shape = QRubberBand::Rectangle;
 308         opt.opaque = false;
 309         opt.rect = elasticBandRect();
 310
 311         QPainter painter(viewport());
 312         painter.save();
 313         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 314         painter.restore();
 315     }
 316
 317     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 318     if (m_dragging) {
 319         const QBrush& brush = viewOptions().palette.brush(QPalette::Normal, QPalette::Highlight);
 320         DragAndDropHelper::drawHoverIndication(viewport(), m_dropRect, brush);
 321     }
 322 }
 323
 324 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 325 {
 326     QTreeView::keyPressEvent(event);
 327
 328     const QItemSelectionModel* selModel = selectionModel();
 329     const QModelIndex currentIndex = selModel->currentIndex();
 330     const bool trigger = currentIndex.isValid()
 331                          && (event->key() == Qt::Key_Return)
 332                          && (selModel->selectedIndexes().count() <= 1);
 333     if (trigger) {
 334         triggerItem(currentIndex);
 335     }
 336 }
 337
 338 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 339 {
 340     QTreeView::resizeEvent(event);
 341
 342     // TODO: There seems to be no easy way to find out whether the resize event
 343     // has been triggered because of resizing the window or by adjusting the column-width
 344     // by a left mouse-click (the columns should only be resized automatically when the window
 345     // size is adjusted). The following workaround works well, but it should be
 346     // considered solving this in a more transparent way.
 347     if (!(QApplication::mouseButtons() & Qt::LeftButton)) {
 348         resizeColumns();
 349     }
 350 }
 351
 352 void DolphinDetailsView::closeEvent(QCloseEvent* event)
 353 {
 354     if (m_clearAdditionalInfo) {
 355         disconnect(m_controller->dolphinView(), SIGNAL(additionalInfoChanged(const KFileItemDelegate::InformationList&)),
 356                 this, SLOT(updateColumnVisibility()));
 357
 358         KFileItemDelegate::InformationList info;
 359         info.append(KFileItemDelegate::NoInformation);
 360         m_controller->indicateAdditionalInfoChange(info);
 361         m_clearAdditionalInfo = false;
 362     }
 363     QTreeView::closeEvent(event);
 364 }
 365
 366 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 367 {
 368     QHeaderView* headerView = header();
 369     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 370 }
 371
 372 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 373 {
 374     QHeaderView* headerView = header();
 375     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 376 }
 377
 378 void DolphinDetailsView::synchronizeSortingState(int column)
 379 {
 380     // The sorting has already been changed in QTreeView if this slot is
 381     // invoked, but Dolphin is not informed about this.
 382     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 383     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 384     m_controller->indicateSortingChange(sorting);
 385     m_controller->indicateSortOrderChange(sortOrder);
 386 }
 387
 388 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 389 {
 390     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 391     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 392     if (pos.x() < nameColumnWidth) {
 393         m_controller->emitItemEntered(itemForIndex(index));
 394     }
 395     else {
 396         m_controller->emitViewportEntered();
 397     }
 398 }
 399
 400 void DolphinDetailsView::updateElasticBand()
 401 {
 402     Q_ASSERT(m_showElasticBand);
 403     QRect dirtyRegion(elasticBandRect());
 404     m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 405     dirtyRegion = dirtyRegion.united(elasticBandRect());
 406     setDirtyRegion(dirtyRegion);
 407 }
 408
 409 QRect DolphinDetailsView::elasticBandRect() const
 410 {
 411     const QPoint pos(contentsPos());
 412     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 413     return QRect(topLeft, m_elasticBandDestination).normalized();
 414 }
 415
 416 void DolphinDetailsView::zoomIn()
 417 {
 418     if (isZoomInPossible()) {
 419         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 420         switch (settings->iconSize()) {
 421         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 422         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 423         default: Q_ASSERT(false); break;
 424         }
 425         updateDecorationSize();
 426     }
 427 }
 428
 429 void DolphinDetailsView::zoomOut()
 430 {
 431     if (isZoomOutPossible()) {
 432         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 433         switch (settings->iconSize()) {
 434         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 435         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 436         default: Q_ASSERT(false); break;
 437         }
 438         updateDecorationSize();
 439     }
 440 }
 441
 442 void DolphinDetailsView::triggerItem(const QModelIndex& index)
 443 {
 444     const KFileItem item = itemForIndex(index);
 445     if (index.isValid() && (index.column() == KDirModel::Name)) {
 446         m_controller->triggerItem(item);
 447     } else {
 448         clearSelection();
 449         m_controller->emitItemEntered(item);
 450     }
 451 }
 452
 453 void DolphinDetailsView::configureColumns(const QPoint& pos)
 454 {
 455     KMenu popup(this);
 456     popup.addTitle(i18nc("@title:menu", "Columns"));
 457
 458     QHeaderView* headerView = header();
 459     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 460         const int logicalIndex = headerView->logicalIndex(i);
 461         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 462         QAction* action = popup.addAction(text);
 463         action->setCheckable(true);
 464         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 465         action->setData(i);
 466     }
 467
 468     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 469     if (activatedAction != 0) {
 470         const bool show = activatedAction->isChecked();
 471         const int columnIndex = activatedAction->data().toInt();
 472
 473         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 474         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 475         if (show) {
 476             Q_ASSERT(!list.contains(info));
 477             list.append(info);
 478         } else {
 479             Q_ASSERT(list.contains(info));
 480             const int index = list.indexOf(info);
 481             list.removeAt(index);
 482         }
 483
 484         m_controller->indicateAdditionalInfoChange(list);
 485         setColumnHidden(columnIndex, !show);
 486     }
 487 }
 488
 489 void DolphinDetailsView::updateColumnVisibility()
 490 {
 491     KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 492     const bool useDefaultColumns = !isVisible() &&
 493                                    (list.isEmpty() ||
 494                                     list.contains(KFileItemDelegate::NoInformation));
 495     if (useDefaultColumns) {
 496         // Using the details view without any additional information (-> additional column)
 497         // makes no sense and leads to a usability problem as no viewport area is available
 498         // anymore. Hence as fallback provide at least a size and date column.
 499         list.clear();
 500         list.append(KFileItemDelegate::Size);
 501         list.append(KFileItemDelegate::ModificationTime);
 502         m_controller->indicateAdditionalInfoChange(list);
 503         m_clearAdditionalInfo = true;
 504     }
 505
 506     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 507         const KFileItemDelegate::Information info = infoForColumn(i);
 508         const bool hide = !list.contains(info);
 509         if (isColumnHidden(i) != hide) {
 510             setColumnHidden(i, hide);
 511             m_clearAdditionalInfo = false;
 512         }
 513     }
 514
 515     resizeColumns();
 516 }
 517
 518 bool DolphinDetailsView::isZoomInPossible() const
 519 {
 520     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 521     return settings->iconSize() < KIconLoader::SizeLarge;
 522 }
 523
 524 bool DolphinDetailsView::isZoomOutPossible() const
 525 {
 526     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 527     return settings->iconSize() > KIconLoader::SizeSmall;
 528 }
 529
 530 void DolphinDetailsView::updateDecorationSize()
 531 {
 532     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 533     const int iconSize = settings->iconSize();
 534     m_decorationSize = QSize(iconSize, iconSize);
 535
 536     m_controller->setZoomInPossible(isZoomInPossible());
 537     m_controller->setZoomOutPossible(isZoomOutPossible());
 538
 539     doItemsLayout();
 540 }
 541
 542 QPoint DolphinDetailsView::contentsPos() const
 543 {
 544     // implementation note: the horizonal position is ignored currently, as no
 545     // horizontal scrolling is done anyway during a selection
 546     const QScrollBar* scrollbar = verticalScrollBar();
 547     Q_ASSERT(scrollbar != 0);
 548
 549     const int maxHeight = maximumViewportSize().height();
 550     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 551     const int visibleHeight = model()->rowCount() + 1 - height;
 552     if (visibleHeight <= 0) {
 553         return QPoint(0, 0);
 554     }
 555
 556     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 557     return QPoint(0, y);
 558 }
 559
 560 KFileItem DolphinDetailsView::itemForIndex(const QModelIndex& index) const
 561 {
 562     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(model());
 563     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 564     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 565     return dirModel->itemForIndex(dirIndex);
 566 }
 567
 568 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 569 {
 570     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 571
 572     switch (columnIndex) {
 573     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 574     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 575     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 576     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 577     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 578     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 579     default: break;
 580     }
 581
 582     return info;
 583 }
 584
 585 void DolphinDetailsView::resizeColumns()
 586 {
 587     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 588     // around 3 seconds for each (!) resize operation when having > 10000 items).
 589     // This gets a problem especially when opening large directories, where several
 590     // resize operations are received for showing the currently available items during
 591     // loading (the application hangs around 20 seconds when loading > 10000 items).
 592
 593     QHeaderView* headerView = header();
 594     QFontMetrics fontMetrics(viewport()->font());
 595
 596     int columnWidth[KDirModel::ColumnCount];
 597     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 598     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 599     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 600     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 601     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 602     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 603
 604     int requiredWidth = 0;
 605     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 606         if (!isColumnHidden(i)) {
 607             columnWidth[i] += 20; // provide a default gap
 608             requiredWidth += columnWidth[i];
 609             headerView->resizeSection(i, columnWidth[i]);
 610         }
 611     }
 612
 613     // resize the name column in a way that the whole available width is used
 614     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 615     if (columnWidth[KDirModel::Name] < 120) {
 616         columnWidth[KDirModel::Name] = 120;
 617     }
 618     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 619 }
 620
 621 #include "dolphindetailsview.moc"