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