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