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_expandingTogglePressed(false),
  50     m_controller(controller),
  51     m_selectionManager(0),
  52     m_font(),
  53     m_decorationSize(),
  54     m_showElasticBand(false),
  55     m_elasticBandOrigin(),
  56     m_elasticBandDestination()
  57 {
  58     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  59     Q_ASSERT(settings != 0);
  60     Q_ASSERT(controller != 0);
  61
  62     setAcceptDrops(true);
  63     setSortingEnabled(true);
  64     setUniformRowHeights(true);
  65     setSelectionBehavior(SelectItems);
  66     setDragDropMode(QAbstractItemView::DragDrop);
  67     setDropIndicatorShown(false);
  68     setAlternatingRowColors(true);
  69     setRootIsDecorated(settings->expandableFolders());
  70     setItemsExpandable(settings->expandableFolders());
  71     setEditTriggers(QAbstractItemView::NoEditTriggers);
  72
  73     setMouseTracking(true);
  74
  75     const ViewProperties props(controller->url());
  76     setSortIndicatorSection(props.sorting());
  77     setSortIndicatorOrder(props.sortOrder());
  78
  79     QHeaderView* headerView = header();
  80     connect(headerView, SIGNAL(sectionClicked(int)),
  81             this, SLOT(synchronizeSortingState(int)));
  82     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  83     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  84             this, SLOT(configureColumns(const QPoint&)));
  85     connect(headerView, SIGNAL(sectionResized(int, int, int)),
  86             this, SLOT(slotHeaderSectionResized(int, int, int)));
  87     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
  88             this, SLOT(disableAutoResizing()));
  89
  90     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  91             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  92     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  93             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  94
  95     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  96     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  97     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  98     // RETURN-key in keyPressEvent().
  99     if (KGlobalSettings::singleClick()) {
 100         connect(this, SIGNAL(clicked(const QModelIndex&)),
 101                 controller, SLOT(triggerItem(const QModelIndex&)));
 102         if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
 103             m_selectionManager = new SelectionManager(this);
 104             connect(m_selectionManager, SIGNAL(selectionChanged()),
 105                     this, SLOT(requestActivation()));
 106             connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
 107                     m_selectionManager, SLOT(reset()));
 108          }
 109     } else {
 110         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 111                 controller, SLOT(triggerItem(const QModelIndex&)));
 112     }
 113     connect(this, SIGNAL(entered(const QModelIndex&)),
 114             this, SLOT(slotEntered(const QModelIndex&)));
 115     connect(this, SIGNAL(viewportEntered()),
 116             controller, SLOT(emitViewportEntered()));
 117     connect(controller, SIGNAL(zoomIn()),
 118             this, SLOT(zoomIn()));
 119     connect(controller, SIGNAL(zoomOut()),
 120             this, SLOT(zoomOut()));
 121     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged()),
 122             this, SLOT(updateColumnVisibility()));
 123
 124     if (settings->useSystemFont()) {
 125         m_font = KGlobalSettings::generalFont();
 126     } else {
 127         m_font = QFont(settings->fontFamily(),
 128                        settings->fontSize(),
 129                        settings->fontWeight(),
 130                        settings->italicFont());
 131     }
 132
 133     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 134     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 135
 136     updateDecorationSize();
 137
 138     setFocus();
 139     viewport()->installEventFilter(this);
 140
 141     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 142             this, SLOT(updateFont()));
 143 }
 144
 145 DolphinDetailsView::~DolphinDetailsView()
 146 {
 147 }
 148
 149 bool DolphinDetailsView::event(QEvent* event)
 150 {
 151     if (event->type() == QEvent::Polish) {
 152         QHeaderView* headerView = header();
 153         headerView->setResizeMode(QHeaderView::Interactive);
 154         headerView->setMovable(false);
 155
 156         updateColumnVisibility();
 157
 158         hideColumn(DolphinModel::Rating);
 159         hideColumn(DolphinModel::Tags);
 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
 167     return QTreeView::event(event);
 168 }
 169
 170 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 171 {
 172     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 173     viewOptions.font = m_font;
 174     viewOptions.showDecorationSelected = true;
 175     viewOptions.decorationSize = m_decorationSize;
 176     return viewOptions;
 177 }
 178
 179 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 180 {
 181     QTreeView::contextMenuEvent(event);
 182     m_controller->triggerContextMenuRequest(event->pos());
 183 }
 184
 185 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 186 {
 187     m_controller->requestActivation();
 188
 189     QTreeView::mousePressEvent(event);
 190
 191     m_expandingTogglePressed = false;
 192     const QModelIndex index = indexAt(event->pos());
 193     const bool updateState = index.isValid() &&
 194                              (index.column() == DolphinModel::Name) &&
 195                              (event->button() == Qt::LeftButton);
 196     if (updateState) {
 197         // TODO: See comment in DolphinIconsView::mousePressEvent(). Only update
 198         // the state if no expanding/collapsing area has been hit:
 199         const QRect rect = visualRect(index);
 200         if (event->pos().x() >= rect.x() + indentation()) {
 201             setState(QAbstractItemView::DraggingState);
 202         } else {
 203             m_expandingTogglePressed = true;
 204         }
 205     }
 206
 207     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 208         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 209         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 210             clearSelection();
 211         }
 212     }
 213
 214     if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 215         m_showElasticBand = true;
 216
 217         const QPoint pos(contentsPos());
 218         m_elasticBandOrigin = event->pos();
 219         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 220         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 221         m_elasticBandDestination = event->pos();
 222     }
 223 }
 224
 225 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 226 {
 227     if (m_showElasticBand) {
 228         const QPoint mousePos = event->pos();
 229         const QModelIndex index = indexAt(mousePos);
 230         if (!index.isValid()) {
 231             // the destination of the selection rectangle is above the viewport. In this
 232             // case QTreeView does no selection at all, which is not the wanted behavior
 233             // in Dolphin -> select all items within the elastic band rectangle
 234             clearSelection();
 235
 236             const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 237             QRect selRect = QRect(m_elasticBandOrigin, m_elasticBandDestination).normalized();
 238             const QRect nameColumnsRect(0, 0, nameColumnWidth, viewport()->height());
 239             selRect = nameColumnsRect.intersected(selRect);
 240
 241             setSelection(selRect, QItemSelectionModel::Select);
 242         }
 243
 244         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 245         // as the Qt-issue #199631 has been fixed.
 246         // QTreeView::mouseMoveEvent(event);
 247         QAbstractItemView::mouseMoveEvent(event);
 248         updateElasticBand();
 249     } else {
 250         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 251         // as the Qt-issue #199631 has been fixed.
 252         // QTreeView::mouseMoveEvent(event);
 253         QAbstractItemView::mouseMoveEvent(event);
 254     }
 255
 256     if (m_expandingTogglePressed) {
 257         // Per default QTreeView starts either a selection or a drag operation when dragging
 258         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 259         // Turn off this behavior in Dolphin to stay predictable:
 260         clearSelection();
 261         setState(QAbstractItemView::NoState);
 262     }
 263 }
 264
 265 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 266 {
 267     QTreeView::mouseReleaseEvent(event);
 268     m_expandingTogglePressed = false;
 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     m_showElasticBand = false;
 279 }
 280
 281 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 282 {
 283     if (event->mimeData()->hasUrls()) {
 284         event->acceptProposedAction();
 285     }
 286
 287     if (m_showElasticBand) {
 288         updateElasticBand();
 289         m_showElasticBand = false;
 290     }
 291 }
 292
 293 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 294 {
 295     QTreeView::dragLeaveEvent(event);
 296     setDirtyRegion(m_dropRect);
 297 }
 298
 299 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 300 {
 301     QTreeView::dragMoveEvent(event);
 302
 303     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 304     setDirtyRegion(m_dropRect);
 305     const QModelIndex index = indexAt(event->pos());
 306     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 307         const KFileItem item = m_controller->itemForIndex(index);
 308         if (!item.isNull() && item.isDir()) {
 309             m_dropRect = visualRect(index);
 310         } else {
 311             m_dropRect.setSize(QSize()); // set as invalid
 312         }
 313         setDirtyRegion(m_dropRect);
 314     }
 315
 316     if (event->mimeData()->hasUrls()) {
 317         // accept url drops, independently from the destination item
 318         event->acceptProposedAction();
 319     }
 320 }
 321
 322 void DolphinDetailsView::dropEvent(QDropEvent* event)
 323 {
 324     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 325     if (!urls.isEmpty()) {
 326         event->acceptProposedAction();
 327         const QModelIndex index = indexAt(event->pos());
 328         KFileItem item;
 329         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 330             item = m_controller->itemForIndex(index);
 331         }
 332         m_controller->indicateDroppedUrls(urls,
 333                                           m_controller->url(),
 334                                           item);
 335     }
 336     QTreeView::dropEvent(event);
 337 }
 338
 339 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 340 {
 341     QTreeView::paintEvent(event);
 342     if (m_showElasticBand) {
 343         // The following code has been taken from QListView
 344         // and adapted to DolphinDetailsView.
 345         // (C) 1992-2007 Trolltech ASA
 346         QStyleOptionRubberBand opt;
 347         opt.initFrom(this);
 348         opt.shape = QRubberBand::Rectangle;
 349         opt.opaque = false;
 350         opt.rect = elasticBandRect();
 351
 352         QPainter painter(viewport());
 353         painter.save();
 354         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 355         painter.restore();
 356     }
 357 }
 358
 359 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 360 {
 361     QTreeView::keyPressEvent(event);
 362     m_controller->handleKeyPressEvent(event);
 363 }
 364
 365 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 366 {
 367     if (m_autoResize) {
 368         resizeColumns();
 369     }
 370     QTreeView::resizeEvent(event);
 371 }
 372
 373 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 374 {
 375     if (m_selectionManager != 0) {
 376         m_selectionManager->reset();
 377     }
 378
 379     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 380     if (event->modifiers() & Qt::ControlModifier) {
 381         event->ignore();
 382         return;
 383     }
 384
 385     QTreeView::wheelEvent(event);
 386 }
 387
 388 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 389 {
 390     QTreeView::currentChanged(current, previous);
 391
 392     // Stay consistent with QListView: When changing the current index by key presses,
 393     // also change the selection.
 394     if (QApplication::mouseButtons() == Qt::NoButton) {
 395         selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 396     }
 397 }
 398
 399 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 400 {
 401     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 402         // if the mouse is above an item and moved very fast outside the widget,
 403         // no viewportEntered() signal might be emitted although the mouse has been moved
 404         // above the viewport
 405         m_controller->emitViewportEntered();
 406     }
 407
 408     return QTreeView::eventFilter(watched, event);
 409 }
 410
 411 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 412 {
 413     QHeaderView* headerView = header();
 414     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 415 }
 416
 417 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 418 {
 419     QHeaderView* headerView = header();
 420     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 421 }
 422
 423 void DolphinDetailsView::synchronizeSortingState(int column)
 424 {
 425     // The sorting has already been changed in QTreeView if this slot is
 426     // invoked, but Dolphin is not informed about this.
 427     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 428     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 429     m_controller->indicateSortingChange(sorting);
 430     m_controller->indicateSortOrderChange(sortOrder);
 431 }
 432
 433 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 434 {
 435     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 436     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 437     if (pos.x() < nameColumnWidth) {
 438         m_controller->emitItemEntered(index);
 439     }
 440     else {
 441         m_controller->emitViewportEntered();
 442     }
 443 }
 444
 445 void DolphinDetailsView::updateElasticBand()
 446 {
 447     if (m_showElasticBand) {
 448         QRect dirtyRegion(elasticBandRect());
 449         m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 450         dirtyRegion = dirtyRegion.united(elasticBandRect());
 451         setDirtyRegion(dirtyRegion);
 452     }
 453 }
 454
 455 QRect DolphinDetailsView::elasticBandRect() const
 456 {
 457     const QPoint pos(contentsPos());
 458     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 459     return QRect(topLeft, m_elasticBandDestination).normalized();
 460 }
 461
 462 void DolphinDetailsView::zoomIn()
 463 {
 464     if (isZoomInPossible()) {
 465         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 466         switch (settings->iconSize()) {
 467         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 468         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 469         default: Q_ASSERT(false); break;
 470         }
 471         updateDecorationSize();
 472     }
 473 }
 474
 475 void DolphinDetailsView::zoomOut()
 476 {
 477     if (isZoomOutPossible()) {
 478         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 479         switch (settings->iconSize()) {
 480         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 481         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 482         default: Q_ASSERT(false); break;
 483         }
 484         updateDecorationSize();
 485     }
 486 }
 487
 488 void DolphinDetailsView::configureColumns(const QPoint& pos)
 489 {
 490     KMenu popup(this);
 491     popup.addTitle(i18nc("@title:menu", "Columns"));
 492
 493     QHeaderView* headerView = header();
 494     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 495         const int logicalIndex = headerView->logicalIndex(i);
 496         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 497         QAction* action = popup.addAction(text);
 498         action->setCheckable(true);
 499         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 500         action->setData(i);
 501     }
 502
 503     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 504     if (activatedAction != 0) {
 505         const bool show = activatedAction->isChecked();
 506         const int columnIndex = activatedAction->data().toInt();
 507
 508         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 509         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 510         if (show) {
 511             Q_ASSERT(!list.contains(info));
 512             list.append(info);
 513         } else {
 514             Q_ASSERT(list.contains(info));
 515             const int index = list.indexOf(info);
 516             list.removeAt(index);
 517         }
 518
 519         m_controller->indicateAdditionalInfoChange(list);
 520         setColumnHidden(columnIndex, !show);
 521     }
 522 }
 523
 524 void DolphinDetailsView::updateColumnVisibility()
 525 {
 526     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 527     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 528         const KFileItemDelegate::Information info = infoForColumn(i);
 529         const bool hide = !list.contains(info);
 530         if (isColumnHidden(i) != hide) {
 531             setColumnHidden(i, hide);
 532         }
 533     }
 534
 535     resizeColumns();
 536 }
 537
 538 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 539 {
 540     Q_UNUSED(logicalIndex);
 541     Q_UNUSED(oldSize);
 542     Q_UNUSED(newSize);
 543     if (QApplication::mouseButtons() & Qt::LeftButton) {
 544         disableAutoResizing();
 545     }
 546 }
 547
 548 void DolphinDetailsView::disableAutoResizing()
 549 {
 550     m_autoResize = false;
 551 }
 552
 553 void DolphinDetailsView::requestActivation()
 554 {
 555     m_controller->requestActivation();
 556 }
 557
 558 void DolphinDetailsView::updateFont()
 559 {
 560     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 561     Q_ASSERT(settings != 0);
 562
 563     if (settings->useSystemFont()) {
 564         m_font = KGlobalSettings::generalFont();
 565     }
 566 }
 567
 568 bool DolphinDetailsView::isZoomInPossible() const
 569 {
 570     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 571     return settings->iconSize() < KIconLoader::SizeLarge;
 572 }
 573
 574 bool DolphinDetailsView::isZoomOutPossible() const
 575 {
 576     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 577     return settings->iconSize() > KIconLoader::SizeSmall;
 578 }
 579
 580 void DolphinDetailsView::updateDecorationSize()
 581 {
 582     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 583     const int iconSize = settings->iconSize();
 584     setIconSize(QSize(iconSize, iconSize));
 585     m_decorationSize = QSize(iconSize, iconSize);
 586
 587     m_controller->setZoomInPossible(isZoomInPossible());
 588     m_controller->setZoomOutPossible(isZoomOutPossible());
 589
 590     if (m_selectionManager != 0) {
 591         m_selectionManager->reset();
 592     }
 593
 594     doItemsLayout();
 595 }
 596
 597 QPoint DolphinDetailsView::contentsPos() const
 598 {
 599     // implementation note: the horizonal position is ignored currently, as no
 600     // horizontal scrolling is done anyway during a selection
 601     const QScrollBar* scrollbar = verticalScrollBar();
 602     Q_ASSERT(scrollbar != 0);
 603
 604     const int maxHeight = maximumViewportSize().height();
 605     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 606     const int visibleHeight = model()->rowCount() + 1 - height;
 607     if (visibleHeight <= 0) {
 608         return QPoint(0, 0);
 609     }
 610
 611     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 612     return QPoint(0, y);
 613 }
 614
 615 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 616 {
 617     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 618
 619     switch (columnIndex) {
 620     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 621     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 622     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 623     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 624     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 625     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 626     default: break;
 627     }
 628
 629     return info;
 630 }
 631
 632 void DolphinDetailsView::resizeColumns()
 633 {
 634     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 635     // around 3 seconds for each (!) resize operation when having > 10000 items).
 636     // This gets a problem especially when opening large directories, where several
 637     // resize operations are received for showing the currently available items during
 638     // loading (the application hangs around 20 seconds when loading > 10000 items).
 639
 640     QHeaderView* headerView = header();
 641     QFontMetrics fontMetrics(viewport()->font());
 642
 643     int columnWidth[KDirModel::ColumnCount];
 644     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 645     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 646     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 647     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 648     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 649     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 650
 651     int requiredWidth = 0;
 652     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 653         if (!isColumnHidden(i)) {
 654             columnWidth[i] += 20; // provide a default gap
 655             requiredWidth += columnWidth[i];
 656             headerView->resizeSection(i, columnWidth[i]);
 657         }
 658     }
 659
 660     // resize the name column in a way that the whole available width is used
 661     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 662     if (columnWidth[KDirModel::Name] < 120) {
 663         columnWidth[KDirModel::Name] = 120;
 664     }
 665     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 666 }
 667
 668 #include "dolphindetailsview.moc"