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_keyPressed(false),
  51     m_controller(controller),
  52     m_selectionManager(0),
  53     m_font(),
  54     m_decorationSize(),
  55     m_showElasticBand(false),
  56     m_elasticBandOrigin(),
  57     m_elasticBandDestination()
  58 {
  59     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  60     Q_ASSERT(settings != 0);
  61     Q_ASSERT(controller != 0);
  62
  63     setAcceptDrops(true);
  64     setSortingEnabled(true);
  65     setUniformRowHeights(true);
  66     setSelectionBehavior(SelectItems);
  67     setDragDropMode(QAbstractItemView::DragDrop);
  68     setDropIndicatorShown(false);
  69     setAlternatingRowColors(true);
  70     setRootIsDecorated(settings->expandableFolders());
  71     setItemsExpandable(settings->expandableFolders());
  72     setEditTriggers(QAbstractItemView::NoEditTriggers);
  73
  74     setMouseTracking(true);
  75
  76     const ViewProperties props(controller->url());
  77     setSortIndicatorSection(props.sorting());
  78     setSortIndicatorOrder(props.sortOrder());
  79
  80     QHeaderView* headerView = header();
  81     connect(headerView, SIGNAL(sectionClicked(int)),
  82             this, SLOT(synchronizeSortingState(int)));
  83     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  84     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  85             this, SLOT(configureColumns(const QPoint&)));
  86     connect(headerView, SIGNAL(sectionResized(int, int, int)),
  87             this, SLOT(slotHeaderSectionResized(int, int, int)));
  88     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
  89             this, SLOT(disableAutoResizing()));
  90
  91     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  92             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  93     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  94             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  95
  96     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  97     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  98     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  99     // RETURN-key in keyPressEvent().
 100     if (KGlobalSettings::singleClick()) {
 101         connect(this, SIGNAL(clicked(const QModelIndex&)),
 102                 controller, SLOT(triggerItem(const QModelIndex&)));
 103         if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
 104             m_selectionManager = new SelectionManager(this);
 105             connect(m_selectionManager, SIGNAL(selectionChanged()),
 106                     this, SLOT(requestActivation()));
 107             connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
 108                     m_selectionManager, SLOT(reset()));
 109          }
 110     } else {
 111         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 112                 controller, SLOT(triggerItem(const QModelIndex&)));
 113     }
 114     connect(this, SIGNAL(entered(const QModelIndex&)),
 115             this, SLOT(slotEntered(const QModelIndex&)));
 116     connect(this, SIGNAL(viewportEntered()),
 117             controller, SLOT(emitViewportEntered()));
 118     connect(controller, SIGNAL(zoomIn()),
 119             this, SLOT(zoomIn()));
 120     connect(controller, SIGNAL(zoomOut()),
 121             this, SLOT(zoomOut()));
 122     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged()),
 123             this, SLOT(updateColumnVisibility()));
 124
 125     if (settings->useSystemFont()) {
 126         m_font = KGlobalSettings::generalFont();
 127     } else {
 128         m_font = QFont(settings->fontFamily(),
 129                        settings->fontSize(),
 130                        settings->fontWeight(),
 131                        settings->italicFont());
 132     }
 133
 134     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 135     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 136
 137     updateDecorationSize();
 138
 139     setFocus();
 140     viewport()->installEventFilter(this);
 141
 142     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 143             this, SLOT(updateFont()));
 144 }
 145
 146 DolphinDetailsView::~DolphinDetailsView()
 147 {
 148 }
 149
 150 bool DolphinDetailsView::event(QEvent* event)
 151 {
 152     if (event->type() == QEvent::Polish) {
 153         QHeaderView* headerView = header();
 154         headerView->setResizeMode(QHeaderView::Interactive);
 155         headerView->setMovable(false);
 156
 157         updateColumnVisibility();
 158
 159         hideColumn(DolphinModel::Rating);
 160         hideColumn(DolphinModel::Tags);
 161     } else if (event->type() == QEvent::UpdateRequest) {
 162         // a wheel movement will scroll 4 items
 163         if (model()->rowCount() > 0) {
 164             verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
 165         }
 166     }
 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     m_expandingTogglePressed = false;
 193     const QModelIndex index = indexAt(event->pos());
 194     const bool updateState = index.isValid() &&
 195                              (index.column() == DolphinModel::Name) &&
 196                              (event->button() == Qt::LeftButton);
 197     if (updateState) {
 198         // TODO: See comment in DolphinIconsView::mousePressEvent(). Only update
 199         // the state if no expanding/collapsing area has been hit:
 200         const QRect rect = visualRect(index);
 201         if (event->pos().x() >= rect.x() + indentation()) {
 202             setState(QAbstractItemView::DraggingState);
 203         } else {
 204             m_expandingTogglePressed = true;
 205         }
 206     }
 207
 208     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 209         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 210         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 211             clearSelection();
 212         }
 213     }
 214
 215     if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 216         m_showElasticBand = true;
 217
 218         const QPoint pos(contentsPos());
 219         m_elasticBandOrigin = event->pos();
 220         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 221         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 222         m_elasticBandDestination = event->pos();
 223     }
 224 }
 225
 226 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 227 {
 228     if (m_showElasticBand) {
 229         const QPoint mousePos = event->pos();
 230         const QModelIndex index = indexAt(mousePos);
 231         if (!index.isValid()) {
 232             // the destination of the selection rectangle is above the viewport. In this
 233             // case QTreeView does no selection at all, which is not the wanted behavior
 234             // in Dolphin -> select all items within the elastic band rectangle
 235             clearSelection();
 236
 237             const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 238             QRect selRect = QRect(m_elasticBandOrigin, m_elasticBandDestination).normalized();
 239             const QRect nameColumnsRect(0, 0, nameColumnWidth, viewport()->height());
 240             selRect = nameColumnsRect.intersected(selRect);
 241
 242             setSelection(selRect, QItemSelectionModel::Select);
 243         }
 244
 245         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 246         // as the Qt-issue #199631 has been fixed.
 247         // QTreeView::mouseMoveEvent(event);
 248         QAbstractItemView::mouseMoveEvent(event);
 249         updateElasticBand();
 250     } else {
 251         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 252         // as the Qt-issue #199631 has been fixed.
 253         // QTreeView::mouseMoveEvent(event);
 254         QAbstractItemView::mouseMoveEvent(event);
 255     }
 256
 257     if (m_expandingTogglePressed) {
 258         // Per default QTreeView starts either a selection or a drag operation when dragging
 259         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 260         // Turn off this behavior in Dolphin to stay predictable:
 261         clearSelection();
 262         setState(QAbstractItemView::NoState);
 263     }
 264 }
 265
 266 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 267 {
 268     QTreeView::mouseReleaseEvent(event);
 269     m_expandingTogglePressed = false;
 270     if (m_showElasticBand) {
 271         updateElasticBand();
 272         m_showElasticBand = false;
 273     }
 274 }
 275
 276 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 277 {
 278     DragAndDropHelper::startDrag(this, supportedActions);
 279     m_showElasticBand = false;
 280 }
 281
 282 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 283 {
 284     if (event->mimeData()->hasUrls()) {
 285         event->acceptProposedAction();
 286     }
 287
 288     if (m_showElasticBand) {
 289         updateElasticBand();
 290         m_showElasticBand = false;
 291     }
 292 }
 293
 294 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 295 {
 296     QTreeView::dragLeaveEvent(event);
 297     setDirtyRegion(m_dropRect);
 298 }
 299
 300 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 301 {
 302     QTreeView::dragMoveEvent(event);
 303
 304     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 305     setDirtyRegion(m_dropRect);
 306     const QModelIndex index = indexAt(event->pos());
 307     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 308         const KFileItem item = m_controller->itemForIndex(index);
 309         if (!item.isNull() && item.isDir()) {
 310             m_dropRect = visualRect(index);
 311         } else {
 312             m_dropRect.setSize(QSize()); // set as invalid
 313         }
 314         setDirtyRegion(m_dropRect);
 315     }
 316
 317     if (event->mimeData()->hasUrls()) {
 318         // accept url drops, independently from the destination item
 319         event->acceptProposedAction();
 320     }
 321 }
 322
 323 void DolphinDetailsView::dropEvent(QDropEvent* event)
 324 {
 325     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 326     if (!urls.isEmpty()) {
 327         event->acceptProposedAction();
 328         const QModelIndex index = indexAt(event->pos());
 329         KFileItem item;
 330         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 331             item = m_controller->itemForIndex(index);
 332         }
 333         m_controller->indicateDroppedUrls(urls,
 334                                           m_controller->url(),
 335                                           item);
 336     }
 337     QTreeView::dropEvent(event);
 338 }
 339
 340 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 341 {
 342     QTreeView::paintEvent(event);
 343     if (m_showElasticBand) {
 344         // The following code has been taken from QListView
 345         // and adapted to DolphinDetailsView.
 346         // (C) 1992-2007 Trolltech ASA
 347         QStyleOptionRubberBand opt;
 348         opt.initFrom(this);
 349         opt.shape = QRubberBand::Rectangle;
 350         opt.opaque = false;
 351         opt.rect = elasticBandRect();
 352
 353         QPainter painter(viewport());
 354         painter.save();
 355         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 356         painter.restore();
 357     }
 358 }
 359
 360 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 361 {
 362     QTreeView::keyPressEvent(event);
 363     m_controller->handleKeyPressEvent(event);
 364     m_keyPressed = true;
 365 }
 366
 367 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 368 {
 369     QTreeView::keyReleaseEvent(event);
 370     m_keyPressed = false;
 371 }
 372
 373 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 374 {
 375     if (m_autoResize) {
 376         resizeColumns();
 377     }
 378     QTreeView::resizeEvent(event);
 379 }
 380
 381 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 382 {
 383     if (m_selectionManager != 0) {
 384         m_selectionManager->reset();
 385     }
 386
 387     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 388     if (event->modifiers() & Qt::ControlModifier) {
 389         event->ignore();
 390         return;
 391     }
 392
 393     QTreeView::wheelEvent(event);
 394 }
 395
 396 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 397 {
 398     QTreeView::currentChanged(current, previous);
 399
 400     // Stay consistent with QListView: When changing the current index by key presses,
 401     // also change the selection.
 402     if (m_keyPressed) {
 403         selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 404     }
 405 }
 406
 407 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 408 {
 409     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 410         // if the mouse is above an item and moved very fast outside the widget,
 411         // no viewportEntered() signal might be emitted although the mouse has been moved
 412         // above the viewport
 413         m_controller->emitViewportEntered();
 414     }
 415
 416     return QTreeView::eventFilter(watched, event);
 417 }
 418
 419 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 420 {
 421     QHeaderView* headerView = header();
 422     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 423 }
 424
 425 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 426 {
 427     QHeaderView* headerView = header();
 428     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 429 }
 430
 431 void DolphinDetailsView::synchronizeSortingState(int column)
 432 {
 433     // The sorting has already been changed in QTreeView if this slot is
 434     // invoked, but Dolphin is not informed about this.
 435     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 436     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 437     m_controller->indicateSortingChange(sorting);
 438     m_controller->indicateSortOrderChange(sortOrder);
 439 }
 440
 441 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 442 {
 443     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 444     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 445     if (pos.x() < nameColumnWidth) {
 446         m_controller->emitItemEntered(index);
 447     }
 448     else {
 449         m_controller->emitViewportEntered();
 450     }
 451 }
 452
 453 void DolphinDetailsView::updateElasticBand()
 454 {
 455     if (m_showElasticBand) {
 456         QRect dirtyRegion(elasticBandRect());
 457         m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 458         dirtyRegion = dirtyRegion.united(elasticBandRect());
 459         setDirtyRegion(dirtyRegion);
 460     }
 461 }
 462
 463 QRect DolphinDetailsView::elasticBandRect() const
 464 {
 465     const QPoint pos(contentsPos());
 466     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 467     return QRect(topLeft, m_elasticBandDestination).normalized();
 468 }
 469
 470 void DolphinDetailsView::zoomIn()
 471 {
 472     if (isZoomInPossible()) {
 473         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 474         switch (settings->iconSize()) {
 475         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 476         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 477         default: Q_ASSERT(false); break;
 478         }
 479         updateDecorationSize();
 480     }
 481 }
 482
 483 void DolphinDetailsView::zoomOut()
 484 {
 485     if (isZoomOutPossible()) {
 486         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 487         switch (settings->iconSize()) {
 488         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 489         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 490         default: Q_ASSERT(false); break;
 491         }
 492         updateDecorationSize();
 493     }
 494 }
 495
 496 void DolphinDetailsView::configureColumns(const QPoint& pos)
 497 {
 498     KMenu popup(this);
 499     popup.addTitle(i18nc("@title:menu", "Columns"));
 500
 501     QHeaderView* headerView = header();
 502     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 503         const int logicalIndex = headerView->logicalIndex(i);
 504         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 505         QAction* action = popup.addAction(text);
 506         action->setCheckable(true);
 507         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 508         action->setData(i);
 509     }
 510
 511     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 512     if (activatedAction != 0) {
 513         const bool show = activatedAction->isChecked();
 514         const int columnIndex = activatedAction->data().toInt();
 515
 516         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 517         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 518         if (show) {
 519             Q_ASSERT(!list.contains(info));
 520             list.append(info);
 521         } else {
 522             Q_ASSERT(list.contains(info));
 523             const int index = list.indexOf(info);
 524             list.removeAt(index);
 525         }
 526
 527         m_controller->indicateAdditionalInfoChange(list);
 528         setColumnHidden(columnIndex, !show);
 529     }
 530 }
 531
 532 void DolphinDetailsView::updateColumnVisibility()
 533 {
 534     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 535     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 536         const KFileItemDelegate::Information info = infoForColumn(i);
 537         const bool hide = !list.contains(info);
 538         if (isColumnHidden(i) != hide) {
 539             setColumnHidden(i, hide);
 540         }
 541     }
 542
 543     resizeColumns();
 544 }
 545
 546 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 547 {
 548     Q_UNUSED(logicalIndex);
 549     Q_UNUSED(oldSize);
 550     Q_UNUSED(newSize);
 551     if (QApplication::mouseButtons() & Qt::LeftButton) {
 552         disableAutoResizing();
 553     }
 554 }
 555
 556 void DolphinDetailsView::disableAutoResizing()
 557 {
 558     m_autoResize = false;
 559 }
 560
 561 void DolphinDetailsView::requestActivation()
 562 {
 563     m_controller->requestActivation();
 564 }
 565
 566 void DolphinDetailsView::updateFont()
 567 {
 568     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 569     Q_ASSERT(settings != 0);
 570
 571     if (settings->useSystemFont()) {
 572         m_font = KGlobalSettings::generalFont();
 573     }
 574 }
 575
 576 bool DolphinDetailsView::isZoomInPossible() const
 577 {
 578     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 579     return settings->iconSize() < KIconLoader::SizeLarge;
 580 }
 581
 582 bool DolphinDetailsView::isZoomOutPossible() const
 583 {
 584     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 585     return settings->iconSize() > KIconLoader::SizeSmall;
 586 }
 587
 588 void DolphinDetailsView::updateDecorationSize()
 589 {
 590     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 591     const int iconSize = settings->iconSize();
 592     setIconSize(QSize(iconSize, iconSize));
 593     m_decorationSize = QSize(iconSize, iconSize);
 594
 595     m_controller->setZoomInPossible(isZoomInPossible());
 596     m_controller->setZoomOutPossible(isZoomOutPossible());
 597
 598     if (m_selectionManager != 0) {
 599         m_selectionManager->reset();
 600     }
 601
 602     doItemsLayout();
 603 }
 604
 605 QPoint DolphinDetailsView::contentsPos() const
 606 {
 607     // implementation note: the horizonal position is ignored currently, as no
 608     // horizontal scrolling is done anyway during a selection
 609     const QScrollBar* scrollbar = verticalScrollBar();
 610     Q_ASSERT(scrollbar != 0);
 611
 612     const int maxHeight = maximumViewportSize().height();
 613     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 614     const int visibleHeight = model()->rowCount() + 1 - height;
 615     if (visibleHeight <= 0) {
 616         return QPoint(0, 0);
 617     }
 618
 619     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 620     return QPoint(0, y);
 621 }
 622
 623 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 624 {
 625     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 626
 627     switch (columnIndex) {
 628     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 629     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 630     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 631     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 632     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 633     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 634     default: break;
 635     }
 636
 637     return info;
 638 }
 639
 640 void DolphinDetailsView::resizeColumns()
 641 {
 642     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 643     // around 3 seconds for each (!) resize operation when having > 10000 items).
 644     // This gets a problem especially when opening large directories, where several
 645     // resize operations are received for showing the currently available items during
 646     // loading (the application hangs around 20 seconds when loading > 10000 items).
 647
 648     QHeaderView* headerView = header();
 649     QFontMetrics fontMetrics(viewport()->font());
 650
 651     int columnWidth[KDirModel::ColumnCount];
 652     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 653     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 654     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 655     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 656     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 657     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 658
 659     int requiredWidth = 0;
 660     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 661         if (!isColumnHidden(i)) {
 662             columnWidth[i] += 20; // provide a default gap
 663             requiredWidth += columnWidth[i];
 664             headerView->resizeSection(i, columnWidth[i]);
 665         }
 666     }
 667
 668     // resize the name column in a way that the whole available width is used
 669     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 670     if (columnWidth[KDirModel::Name] < 120) {
 671         columnWidth[KDirModel::Name] = 120;
 672     }
 673     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 674 }
 675
 676 #include "dolphindetailsview.moc"