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     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  58     Q_ASSERT(settings != 0);
  59     Q_ASSERT(controller != 0);
  60
  61     setAcceptDrops(true);
  62     setSortingEnabled(true);
  63     setUniformRowHeights(true);
  64     setSelectionBehavior(SelectItems);
  65     setDragDropMode(QAbstractItemView::DragDrop);
  66     setDropIndicatorShown(false);
  67     setAlternatingRowColors(true);
  68     setRootIsDecorated(settings->expandableFolders());
  69     setItemsExpandable(settings->expandableFolders());
  70
  71     setMouseTracking(true);
  72     viewport()->setAttribute(Qt::WA_Hover);
  73
  74     const ViewProperties props(controller->url());
  75     setSortIndicatorSection(props.sorting());
  76     setSortIndicatorOrder(props.sortOrder());
  77
  78     QHeaderView* headerView = header();
  79     connect(headerView, SIGNAL(sectionClicked(int)),
  80             this, SLOT(synchronizeSortingState(int)));
  81     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  82     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  83             this, SLOT(configureColumns(const QPoint&)));
  84     connect(headerView, SIGNAL(sectionResized(int, int, int)),
  85             this, SLOT(slotHeaderSectionResized(int, int, int)));
  86     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
  87             this, SLOT(disableAutoResizing()));
  88
  89     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  90             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  91     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  92             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  93
  94     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  95     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  96     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  97     // RETURN-key in keyPressEvent().
  98     if (KGlobalSettings::singleClick()) {
  99         connect(this, SIGNAL(clicked(const QModelIndex&)),
 100                 controller, SLOT(triggerItem(const QModelIndex&)));
 101         if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
 102             SelectionManager* selManager = new SelectionManager(this);
 103             connect(selManager, SIGNAL(selectionChanged()),
 104                     this, SLOT(requestActivation()));
 105             connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
 106                     selManager, SLOT(reset()));
 107         }
 108     } else {
 109         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 110                 controller, SLOT(triggerItem(const QModelIndex&)));
 111     }
 112     connect(this, SIGNAL(entered(const QModelIndex&)),
 113             this, SLOT(slotEntered(const QModelIndex&)));
 114     connect(this, SIGNAL(viewportEntered()),
 115             controller, SLOT(emitViewportEntered()));
 116     connect(controller, SIGNAL(zoomIn()),
 117             this, SLOT(zoomIn()));
 118     connect(controller, SIGNAL(zoomOut()),
 119             this, SLOT(zoomOut()));
 120     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged()),
 121             this, SLOT(updateColumnVisibility()));
 122
 123     if (settings->useSystemFont()) {
 124         m_font = KGlobalSettings::generalFont();
 125     } else {
 126         m_font = QFont(settings->fontFamily(),
 127                        settings->fontSize(),
 128                        settings->fontWeight(),
 129                        settings->italicFont());
 130     }
 131
 132 // TODO: Remove this check when 4.3.2 is released and KDE requires it... this
 133 //       check avoids a division by zero happening on versions before 4.3.1.
 134 //       Right now KDE in theory can be shipped with Qt 4.3.0 and above.
 135 //       ereslibre
 136 #if (QT_VERSION >= QT_VERSION_CHECK(4, 3, 2) || defined(QT_KDE_QT_COPY))
 137     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 138     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 139 #endif
 140
 141     updateDecorationSize();
 142
 143     setFocus();
 144
 145     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 146             this, SLOT(updateFont()));
 147 }
 148
 149 DolphinDetailsView::~DolphinDetailsView()
 150 {
 151 }
 152
 153 bool DolphinDetailsView::event(QEvent* event)
 154 {
 155     if (event->type() == QEvent::Polish) {
 156         QHeaderView* headerView = header();
 157         headerView->setResizeMode(QHeaderView::Interactive);
 158         headerView->setMovable(false);
 159
 160         updateColumnVisibility();
 161
 162         hideColumn(DolphinModel::Rating);
 163         hideColumn(DolphinModel::Tags);
 164     }
 165 // TODO: Remove this check when 4.3.2 is released and KDE requires it... this
 166 //       check avoids a division by zero happening on versions before 4.3.1.
 167 //       Right now KDE in theory can be shipped with Qt 4.3.0 and above.
 168 //       ereslibre
 169 #if (QT_VERSION >= QT_VERSION_CHECK(4, 3, 2) || defined(QT_KDE_QT_COPY))
 170     else if (event->type() == QEvent::UpdateRequest) {
 171         // a wheel movement will scroll 4 items
 172         if (model()->rowCount() > 0) {
 173             verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
 174         }
 175     }
 176 #endif
 177
 178     return QTreeView::event(event);
 179 }
 180
 181 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 182 {
 183     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 184     viewOptions.font = m_font;
 185     viewOptions.showDecorationSelected = true;
 186     viewOptions.decorationSize = m_decorationSize;
 187     return viewOptions;
 188 }
 189
 190 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 191 {
 192     QTreeView::contextMenuEvent(event);
 193     m_controller->triggerContextMenuRequest(event->pos());
 194 }
 195
 196 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 197 {
 198     m_controller->requestActivation();
 199
 200     QTreeView::mousePressEvent(event);
 201
 202     const QModelIndex index = indexAt(event->pos());
 203     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 204         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 205         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 206             clearSelection();
 207         }
 208     }
 209
 210     if (event->button() == Qt::LeftButton) {
 211         m_showElasticBand = true;
 212
 213         const QPoint pos(contentsPos());
 214         m_elasticBandOrigin = event->pos();
 215         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 216         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 217         m_elasticBandDestination = event->pos();
 218     }
 219 }
 220
 221 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 222 {
 223     if (m_showElasticBand) {
 224         const QPoint mousePos = event->pos();
 225         const QModelIndex index = indexAt(mousePos);
 226         if (!index.isValid()) {
 227             // the destination of the selection rectangle is above the viewport. In this
 228             // case QTreeView does no selection at all, which is not the wanted behavior
 229             // in Dolphin -> select all items within the elastic band rectangle
 230             clearSelection();
 231
 232             const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 233             QRect selRect = QRect(m_elasticBandOrigin, m_elasticBandDestination).normalized();
 234             const QRect nameColumnsRect(0, 0, nameColumnWidth, viewport()->height());
 235             selRect = nameColumnsRect.intersected(selRect);
 236
 237             setSelection(selRect, QItemSelectionModel::Select);
 238         }
 239
 240         // TODO: see comment at end of method
 241         // QTreeView::mouseMoveEvent(event);
 242         QAbstractItemView::mouseMoveEvent(event);
 243         updateElasticBand();
 244     } else {
 245         // TODO: see comment at end of method
 246         //QTreeView::mouseMoveEvent(event);
 247         QAbstractItemView::mouseMoveEvent(event);
 248     }
 249
 250     // The original implementation of QTreeView::mouseMoveEvent() looks like this (Qt4.4):
 251     //
 252     // void QTreeView::mouseMoveEvent(QMouseEvent *event)
 253     // {
 254     //     Q_D(QTreeView);
 255     //     if (d->itemDecorationAt(event->pos()) == -1) // ### what about expanding/collapsing state ?
 256     //         QAbstractItemView::mouseMoveEvent(event);
 257     // }
 258     //
 259     // This prevents that the signal 'entered()' is emitted when the mouse is above a decoration,
 260     // although the hovered item has changed. The SelectionManager is connected to 'entered()'
 261     // and assumes that the old item is selected. This is currently bypassed by skipping
 262     // the base implementation and invoking QAbstractItemView::mouseMoveEvent() directly.
 263     // Submitted a bug report to Trolltech, bug ID is still pending.
 264 }
 265
 266 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 267 {
 268     QTreeView::mouseReleaseEvent(event);
 269     if (m_showElasticBand) {
 270         updateElasticBand();
 271         m_showElasticBand = false;
 272     }
 273 }
 274
 275 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 276 {
 277     DragAndDropHelper::startDrag(this, supportedActions);
 278 }
 279
 280 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 281 {
 282     if (event->mimeData()->hasUrls()) {
 283         event->acceptProposedAction();
 284     }
 285
 286     if (m_showElasticBand) {
 287         updateElasticBand();
 288         m_showElasticBand = false;
 289     }
 290     m_dragging = true;
 291 }
 292
 293 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 294 {
 295     QTreeView::dragLeaveEvent(event);
 296
 297     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 298     m_dragging = false;
 299     setDirtyRegion(m_dropRect);
 300 }
 301
 302 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 303 {
 304     QTreeView::dragMoveEvent(event);
 305
 306     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 307     setDirtyRegion(m_dropRect);
 308     const QModelIndex index = indexAt(event->pos());
 309     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 310         m_dragging = false;
 311     } else {
 312         m_dragging = true;
 313         const KFileItem item = m_controller->itemForIndex(index);
 314         if (!item.isNull() && item.isDir()) {
 315             m_dropRect = visualRect(index);
 316         } else {
 317             m_dropRect.setSize(QSize()); // set as invalid
 318         }
 319         setDirtyRegion(m_dropRect);
 320     }
 321
 322     if (event->mimeData()->hasUrls()) {
 323         // accept url drops, independently from the destination item
 324         event->acceptProposedAction();
 325     }
 326 }
 327
 328 void DolphinDetailsView::dropEvent(QDropEvent* event)
 329 {
 330     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 331     if (!urls.isEmpty()) {
 332         event->acceptProposedAction();
 333         const QModelIndex index = indexAt(event->pos());
 334         KFileItem item;
 335         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 336             item = m_controller->itemForIndex(index);
 337         }
 338         m_controller->indicateDroppedUrls(urls,
 339                                           m_controller->url(),
 340                                           item);
 341     }
 342     QTreeView::dropEvent(event);
 343     m_dragging = false;
 344 }
 345
 346 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 347 {
 348     QTreeView::paintEvent(event);
 349     if (m_showElasticBand) {
 350         // The following code has been taken from QListView
 351         // and adapted to DolphinDetailsView.
 352         // (C) 1992-2007 Trolltech ASA
 353         QStyleOptionRubberBand opt;
 354         opt.initFrom(this);
 355         opt.shape = QRubberBand::Rectangle;
 356         opt.opaque = false;
 357         opt.rect = elasticBandRect();
 358
 359         QPainter painter(viewport());
 360         painter.save();
 361         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 362         painter.restore();
 363     }
 364
 365     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 366     if (m_dragging) {
 367         const QBrush& brush = viewOptions().palette.brush(QPalette::Normal, QPalette::Highlight);
 368         DragAndDropHelper::drawHoverIndication(this, m_dropRect, brush);
 369     }
 370 }
 371
 372 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 373 {
 374     QTreeView::keyPressEvent(event);
 375     m_controller->handleKeyPressEvent(event);
 376 }
 377
 378 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 379 {
 380     if (m_autoResize) {
 381         resizeColumns();
 382     }
 383     QTreeView::resizeEvent(event);
 384 }
 385
 386 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 387 {
 388     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 389     // (installing an event filter does not work, as the wheel event is handled first)
 390     if (event->modifiers() & Qt::ControlModifier) {
 391         event->ignore();
 392         return;
 393     }
 394     QTreeView::wheelEvent(event);
 395 }
 396
 397 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 398 {
 399     QTreeView::currentChanged(current, previous);
 400     selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 401 }
 402
 403 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 404 {
 405     QHeaderView* headerView = header();
 406     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 407 }
 408
 409 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 410 {
 411     QHeaderView* headerView = header();
 412     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 413 }
 414
 415 void DolphinDetailsView::synchronizeSortingState(int column)
 416 {
 417     // The sorting has already been changed in QTreeView if this slot is
 418     // invoked, but Dolphin is not informed about this.
 419     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 420     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 421     m_controller->indicateSortingChange(sorting);
 422     m_controller->indicateSortOrderChange(sortOrder);
 423 }
 424
 425 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 426 {
 427     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 428     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 429     if (pos.x() < nameColumnWidth) {
 430         m_controller->emitItemEntered(index);
 431     }
 432     else {
 433         m_controller->emitViewportEntered();
 434     }
 435 }
 436
 437 void DolphinDetailsView::updateElasticBand()
 438 {
 439     if (m_showElasticBand) {
 440         QRect dirtyRegion(elasticBandRect());
 441         m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 442         dirtyRegion = dirtyRegion.united(elasticBandRect());
 443         setDirtyRegion(dirtyRegion);
 444     }
 445 }
 446
 447 QRect DolphinDetailsView::elasticBandRect() const
 448 {
 449     const QPoint pos(contentsPos());
 450     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 451     return QRect(topLeft, m_elasticBandDestination).normalized();
 452 }
 453
 454 void DolphinDetailsView::zoomIn()
 455 {
 456     if (isZoomInPossible()) {
 457         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 458         switch (settings->iconSize()) {
 459         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 460         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 461         default: Q_ASSERT(false); break;
 462         }
 463         updateDecorationSize();
 464     }
 465 }
 466
 467 void DolphinDetailsView::zoomOut()
 468 {
 469     if (isZoomOutPossible()) {
 470         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 471         switch (settings->iconSize()) {
 472         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 473         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 474         default: Q_ASSERT(false); break;
 475         }
 476         updateDecorationSize();
 477     }
 478 }
 479
 480 void DolphinDetailsView::configureColumns(const QPoint& pos)
 481 {
 482     KMenu popup(this);
 483     popup.addTitle(i18nc("@title:menu", "Columns"));
 484
 485     QHeaderView* headerView = header();
 486     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 487         const int logicalIndex = headerView->logicalIndex(i);
 488         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 489         QAction* action = popup.addAction(text);
 490         action->setCheckable(true);
 491         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 492         action->setData(i);
 493     }
 494
 495     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 496     if (activatedAction != 0) {
 497         const bool show = activatedAction->isChecked();
 498         const int columnIndex = activatedAction->data().toInt();
 499
 500         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 501         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 502         if (show) {
 503             Q_ASSERT(!list.contains(info));
 504             list.append(info);
 505         } else {
 506             Q_ASSERT(list.contains(info));
 507             const int index = list.indexOf(info);
 508             list.removeAt(index);
 509         }
 510
 511         m_controller->indicateAdditionalInfoChange(list);
 512         setColumnHidden(columnIndex, !show);
 513     }
 514 }
 515
 516 void DolphinDetailsView::updateColumnVisibility()
 517 {
 518     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 519     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 520         const KFileItemDelegate::Information info = infoForColumn(i);
 521         const bool hide = !list.contains(info);
 522         if (isColumnHidden(i) != hide) {
 523             setColumnHidden(i, hide);
 524         }
 525     }
 526
 527     resizeColumns();
 528 }
 529
 530 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 531 {
 532     Q_UNUSED(logicalIndex);
 533     Q_UNUSED(oldSize);
 534     Q_UNUSED(newSize);
 535     if (QApplication::mouseButtons() & Qt::LeftButton) {
 536         disableAutoResizing();
 537     }
 538 }
 539
 540 void DolphinDetailsView::disableAutoResizing()
 541 {
 542     m_autoResize = false;
 543 }
 544
 545 void DolphinDetailsView::requestActivation()
 546 {
 547     m_controller->requestActivation();
 548 }
 549
 550 void DolphinDetailsView::updateFont()
 551 {
 552     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 553     Q_ASSERT(settings != 0);
 554
 555     if (settings->useSystemFont()) {
 556         m_font = KGlobalSettings::generalFont();
 557     }
 558 }
 559
 560 bool DolphinDetailsView::isZoomInPossible() const
 561 {
 562     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 563     return settings->iconSize() < KIconLoader::SizeLarge;
 564 }
 565
 566 bool DolphinDetailsView::isZoomOutPossible() const
 567 {
 568     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 569     return settings->iconSize() > KIconLoader::SizeSmall;
 570 }
 571
 572 void DolphinDetailsView::updateDecorationSize()
 573 {
 574     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 575     const int iconSize = settings->iconSize();
 576     setIconSize(QSize(iconSize, iconSize));
 577     m_decorationSize = QSize(iconSize, iconSize);
 578
 579     m_controller->setZoomInPossible(isZoomInPossible());
 580     m_controller->setZoomOutPossible(isZoomOutPossible());
 581
 582     doItemsLayout();
 583 }
 584
 585 QPoint DolphinDetailsView::contentsPos() const
 586 {
 587     // implementation note: the horizonal position is ignored currently, as no
 588     // horizontal scrolling is done anyway during a selection
 589     const QScrollBar* scrollbar = verticalScrollBar();
 590     Q_ASSERT(scrollbar != 0);
 591
 592     const int maxHeight = maximumViewportSize().height();
 593     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 594     const int visibleHeight = model()->rowCount() + 1 - height;
 595     if (visibleHeight <= 0) {
 596         return QPoint(0, 0);
 597     }
 598
 599     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 600     return QPoint(0, y);
 601 }
 602
 603 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 604 {
 605     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 606
 607     switch (columnIndex) {
 608     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 609     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 610     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 611     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 612     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 613     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 614     default: break;
 615     }
 616
 617     return info;
 618 }
 619
 620 void DolphinDetailsView::resizeColumns()
 621 {
 622     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 623     // around 3 seconds for each (!) resize operation when having > 10000 items).
 624     // This gets a problem especially when opening large directories, where several
 625     // resize operations are received for showing the currently available items during
 626     // loading (the application hangs around 20 seconds when loading > 10000 items).
 627
 628     QHeaderView* headerView = header();
 629     QFontMetrics fontMetrics(viewport()->font());
 630
 631     int columnWidth[KDirModel::ColumnCount];
 632     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 633     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 634     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 635     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 636     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 637     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 638
 639     int requiredWidth = 0;
 640     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 641         if (!isColumnHidden(i)) {
 642             columnWidth[i] += 20; // provide a default gap
 643             requiredWidth += columnWidth[i];
 644             headerView->resizeSection(i, columnWidth[i]);
 645         }
 646     }
 647
 648     // resize the name column in a way that the whole available width is used
 649     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 650     if (columnWidth[KDirModel::Name] < 120) {
 651         columnWidth[KDirModel::Name] = 120;
 652     }
 653     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 654 }
 655
 656 #include "dolphindetailsview.moc"