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     setLayoutDirection(Qt::LeftToRight);
  64     setAcceptDrops(true);
  65     setSortingEnabled(true);
  66     setUniformRowHeights(true);
  67     setSelectionBehavior(SelectItems);
  68     setDragDropMode(QAbstractItemView::DragDrop);
  69     setDropIndicatorShown(false);
  70     setAlternatingRowColors(true);
  71     setRootIsDecorated(settings->expandableFolders());
  72     setItemsExpandable(settings->expandableFolders());
  73     setEditTriggers(QAbstractItemView::NoEditTriggers);
  74
  75     setMouseTracking(true);
  76
  77     const ViewProperties props(controller->url());
  78     setSortIndicatorSection(props.sorting());
  79     setSortIndicatorOrder(props.sortOrder());
  80
  81     QHeaderView* headerView = header();
  82     connect(headerView, SIGNAL(sectionClicked(int)),
  83             this, SLOT(synchronizeSortingState(int)));
  84     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  85     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  86             this, SLOT(configureColumns(const QPoint&)));
  87     connect(headerView, SIGNAL(sectionResized(int, int, int)),
  88             this, SLOT(slotHeaderSectionResized(int, int, int)));
  89     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
  90             this, SLOT(disableAutoResizing()));
  91
  92     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  93             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  94     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  95             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  96
  97     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  98     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  99     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
 100     // RETURN-key in keyPressEvent().
 101     if (KGlobalSettings::singleClick()) {
 102         connect(this, SIGNAL(clicked(const QModelIndex&)),
 103                 controller, SLOT(triggerItem(const QModelIndex&)));
 104     } else {
 105         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 106                 controller, SLOT(triggerItem(const QModelIndex&)));
 107     }
 108
 109     if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
 110         m_selectionManager = new SelectionManager(this);
 111         connect(m_selectionManager, SIGNAL(selectionChanged()),
 112                 this, SLOT(requestActivation()));
 113         connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
 114                 m_selectionManager, SLOT(reset()));
 115     }
 116
 117     connect(this, SIGNAL(entered(const QModelIndex&)),
 118             this, SLOT(slotEntered(const QModelIndex&)));
 119     connect(this, SIGNAL(viewportEntered()),
 120             controller, SLOT(emitViewportEntered()));
 121     connect(controller, SIGNAL(zoomLevelChanged(int)),
 122             this, SLOT(setZoomLevel(int)));
 123     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged()),
 124             this, SLOT(updateColumnVisibility()));
 125     connect(controller, SIGNAL(activationChanged(bool)),
 126             this, SLOT(slotActivationChanged(bool)));
 127
 128     if (settings->useSystemFont()) {
 129         m_font = KGlobalSettings::generalFont();
 130     } else {
 131         m_font = QFont(settings->fontFamily(),
 132                        settings->fontSize(),
 133                        settings->fontWeight(),
 134                        settings->italicFont());
 135     }
 136
 137     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 138     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 139
 140     const DolphinView* view = controller->dolphinView();
 141     connect(view, SIGNAL(showPreviewChanged()),
 142             this, SLOT(slotShowPreviewChanged()));
 143
 144     updateDecorationSize(view->showPreview());
 145
 146     setFocus();
 147     viewport()->installEventFilter(this);
 148
 149     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 150             this, SLOT(updateFont()));
 151 }
 152
 153 DolphinDetailsView::~DolphinDetailsView()
 154 {
 155 }
 156
 157 bool DolphinDetailsView::event(QEvent* event)
 158 {
 159     if (event->type() == QEvent::Polish) {
 160         QHeaderView* headerView = header();
 161         headerView->setResizeMode(QHeaderView::Interactive);
 162         headerView->setMovable(false);
 163
 164         updateColumnVisibility();
 165
 166         hideColumn(DolphinModel::Rating);
 167         hideColumn(DolphinModel::Tags);
 168     } else if (event->type() == QEvent::UpdateRequest) {
 169         // a wheel movement will scroll 4 items
 170         if (model()->rowCount() > 0) {
 171             verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
 172         }
 173     }
 174
 175     return QTreeView::event(event);
 176 }
 177
 178 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 179 {
 180     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 181     viewOptions.font = m_font;
 182     viewOptions.showDecorationSelected = true;
 183     viewOptions.decorationSize = m_decorationSize;
 184     return viewOptions;
 185 }
 186
 187 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 188 {
 189     QTreeView::contextMenuEvent(event);
 190     m_controller->triggerContextMenuRequest(event->pos());
 191 }
 192
 193 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 194 {
 195     m_controller->requestActivation();
 196
 197     const QModelIndex current = currentIndex();
 198     QTreeView::mousePressEvent(event);
 199
 200     m_expandingTogglePressed = false;
 201     const QModelIndex index = indexAt(event->pos());
 202     const bool updateState = index.isValid() &&
 203                              (index.column() == DolphinModel::Name) &&
 204                              (event->button() == Qt::LeftButton);
 205     if (updateState) {
 206         // TODO: See comment in DolphinIconsView::mousePressEvent(). Only update
 207         // the state if no expanding/collapsing area has been hit:
 208         const QRect rect = visualRect(index);
 209         if (event->pos().x() >= rect.x() + indentation()) {
 210             setState(QAbstractItemView::DraggingState);
 211         } else {
 212             m_expandingTogglePressed = true;
 213         }
 214     }
 215
 216     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 217         if (QApplication::mouseButtons() & Qt::MidButton) {
 218             m_controller->replaceUrlByClipboard();
 219         }
 220
 221         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 222         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 223             clearSelection();
 224         }
 225
 226         // restore the current index, other columns are handled as viewport area
 227         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 228     }
 229
 230     if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 231         m_showElasticBand = true;
 232
 233         const QPoint pos(contentsPos());
 234         m_elasticBandOrigin = event->pos();
 235         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 236         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 237         m_elasticBandDestination = event->pos();
 238     }
 239 }
 240
 241 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 242 {
 243     if (m_showElasticBand) {
 244         const QPoint mousePos = event->pos();
 245         const QModelIndex index = indexAt(mousePos);
 246         if (!index.isValid()) {
 247             // the destination of the selection rectangle is above the viewport. In this
 248             // case QTreeView does no selection at all, which is not the wanted behavior
 249             // in Dolphin -> select all items within the elastic band rectangle
 250             clearSelection();
 251
 252             const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 253             QRect selRect = QRect(m_elasticBandOrigin, m_elasticBandDestination).normalized();
 254             const QRect nameColumnsRect(0, 0, nameColumnWidth, viewport()->height());
 255             selRect = nameColumnsRect.intersected(selRect);
 256
 257             setSelection(selRect, QItemSelectionModel::Select);
 258         }
 259
 260         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 261         // as the Qt-issue #199631 has been fixed.
 262         // QTreeView::mouseMoveEvent(event);
 263         QAbstractItemView::mouseMoveEvent(event);
 264         updateElasticBand();
 265     } else {
 266         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 267         // as the Qt-issue #199631 has been fixed.
 268         // QTreeView::mouseMoveEvent(event);
 269         QAbstractItemView::mouseMoveEvent(event);
 270     }
 271
 272     if (m_expandingTogglePressed) {
 273         // Per default QTreeView starts either a selection or a drag operation when dragging
 274         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 275         // Turn off this behavior in Dolphin to stay predictable:
 276         clearSelection();
 277         setState(QAbstractItemView::NoState);
 278     }
 279 }
 280
 281 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 282 {
 283     const QModelIndex index = indexAt(event->pos());
 284     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 285         QTreeView::mouseReleaseEvent(event);
 286     } else {
 287         // don't change the current index if the cursor is released
 288         // above any other column than the name column, as the other
 289         // columns act as viewport
 290         const QModelIndex current = currentIndex();
 291         QTreeView::mouseReleaseEvent(event);
 292         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 293     }
 294
 295     m_expandingTogglePressed = false;
 296     if (m_showElasticBand) {
 297         updateElasticBand();
 298         m_showElasticBand = false;
 299     }
 300 }
 301
 302 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 303 {
 304     DragAndDropHelper::startDrag(this, supportedActions);
 305     m_showElasticBand = false;
 306 }
 307
 308 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 309 {
 310     if (event->mimeData()->hasUrls()) {
 311         event->acceptProposedAction();
 312     }
 313
 314     if (m_showElasticBand) {
 315         updateElasticBand();
 316         m_showElasticBand = false;
 317     }
 318 }
 319
 320 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 321 {
 322     QTreeView::dragLeaveEvent(event);
 323     setDirtyRegion(m_dropRect);
 324 }
 325
 326 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 327 {
 328     QTreeView::dragMoveEvent(event);
 329
 330     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 331     setDirtyRegion(m_dropRect);
 332     const QModelIndex index = indexAt(event->pos());
 333     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 334         const KFileItem item = m_controller->itemForIndex(index);
 335         if (!item.isNull() && item.isDir()) {
 336             m_dropRect = visualRect(index);
 337         } else {
 338             m_dropRect.setSize(QSize()); // set as invalid
 339         }
 340         setDirtyRegion(m_dropRect);
 341     }
 342
 343     if (event->mimeData()->hasUrls()) {
 344         // accept url drops, independently from the destination item
 345         event->acceptProposedAction();
 346     }
 347 }
 348
 349 void DolphinDetailsView::dropEvent(QDropEvent* event)
 350 {
 351     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 352     if (!urls.isEmpty()) {
 353         event->acceptProposedAction();
 354         const QModelIndex index = indexAt(event->pos());
 355         KFileItem item;
 356         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 357             item = m_controller->itemForIndex(index);
 358         }
 359         m_controller->indicateDroppedUrls(urls,
 360                                           m_controller->url(),
 361                                           item);
 362     }
 363     QTreeView::dropEvent(event);
 364 }
 365
 366 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 367 {
 368     QTreeView::paintEvent(event);
 369     if (m_showElasticBand) {
 370         // The following code has been taken from QListView
 371         // and adapted to DolphinDetailsView.
 372         // (C) 1992-2007 Trolltech ASA
 373         QStyleOptionRubberBand opt;
 374         opt.initFrom(this);
 375         opt.shape = QRubberBand::Rectangle;
 376         opt.opaque = false;
 377         opt.rect = elasticBandRect();
 378
 379         QPainter painter(viewport());
 380         painter.save();
 381         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 382         painter.restore();
 383     }
 384 }
 385
 386 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 387 {
 388     // If the Control modifier is pressed, a multiple selection
 389     // is done and DolphinDetailsView::currentChanged() may not
 390     // not change the selection in a custom way.
 391     m_keyPressed = !(event->modifiers() & Qt::ControlModifier);
 392
 393     QTreeView::keyPressEvent(event);
 394     m_controller->handleKeyPressEvent(event);
 395 }
 396
 397 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 398 {
 399     QTreeView::keyReleaseEvent(event);
 400     m_keyPressed = false;
 401 }
 402
 403 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 404 {
 405     if (m_autoResize) {
 406         resizeColumns();
 407     }
 408     QTreeView::resizeEvent(event);
 409 }
 410
 411 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 412 {
 413     if (m_selectionManager != 0) {
 414         m_selectionManager->reset();
 415     }
 416
 417     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 418     if (event->modifiers() & Qt::ControlModifier) {
 419         event->ignore();
 420         return;
 421     }
 422
 423     QTreeView::wheelEvent(event);
 424 }
 425
 426 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 427 {
 428     QTreeView::currentChanged(current, previous);
 429
 430     // Stay consistent with QListView: When changing the current index by key presses,
 431     // also change the selection.
 432     if (m_keyPressed) {
 433         selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 434     }
 435 }
 436
 437 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 438 {
 439     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 440         // if the mouse is above an item and moved very fast outside the widget,
 441         // no viewportEntered() signal might be emitted although the mouse has been moved
 442         // above the viewport
 443         m_controller->emitViewportEntered();
 444     }
 445
 446     return QTreeView::eventFilter(watched, event);
 447 }
 448
 449 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 450 {
 451     QHeaderView* headerView = header();
 452     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 453 }
 454
 455 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 456 {
 457     QHeaderView* headerView = header();
 458     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 459 }
 460
 461 void DolphinDetailsView::synchronizeSortingState(int column)
 462 {
 463     // The sorting has already been changed in QTreeView if this slot is
 464     // invoked, but Dolphin is not informed about this.
 465     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 466     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 467     m_controller->indicateSortingChange(sorting);
 468     m_controller->indicateSortOrderChange(sortOrder);
 469 }
 470
 471 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 472 {
 473     if (index.column() == DolphinModel::Name) {
 474         m_controller->emitItemEntered(index);
 475     } else {
 476         m_controller->emitViewportEntered();
 477     }
 478 }
 479
 480 void DolphinDetailsView::updateElasticBand()
 481 {
 482     if (m_showElasticBand) {
 483         QRect dirtyRegion(elasticBandRect());
 484         m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 485         dirtyRegion = dirtyRegion.united(elasticBandRect());
 486         setDirtyRegion(dirtyRegion);
 487     }
 488 }
 489
 490 QRect DolphinDetailsView::elasticBandRect() const
 491 {
 492     const QPoint pos(contentsPos());
 493     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 494     return QRect(topLeft, m_elasticBandDestination).normalized();
 495 }
 496
 497 void DolphinDetailsView::setZoomLevel(int level)
 498 {
 499     const int size = DolphinController::iconSizeForZoomLevel(level);
 500     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 501
 502     const bool showPreview = m_controller->dolphinView()->showPreview();
 503     if (showPreview) {
 504         settings->setPreviewSize(size);
 505     } else {
 506         settings->setIconSize(size);
 507     }
 508
 509     updateDecorationSize(showPreview);
 510 }
 511
 512
 513 void DolphinDetailsView::slotShowPreviewChanged()
 514 {
 515     const DolphinView* view = m_controller->dolphinView();
 516     updateDecorationSize(view->showPreview());
 517 }
 518
 519 void DolphinDetailsView::configureColumns(const QPoint& pos)
 520 {
 521     KMenu popup(this);
 522     popup.addTitle(i18nc("@title:menu", "Columns"));
 523
 524     QHeaderView* headerView = header();
 525     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 526         const int logicalIndex = headerView->logicalIndex(i);
 527         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 528         QAction* action = popup.addAction(text);
 529         action->setCheckable(true);
 530         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 531         action->setData(i);
 532     }
 533
 534     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 535     if (activatedAction != 0) {
 536         const bool show = activatedAction->isChecked();
 537         const int columnIndex = activatedAction->data().toInt();
 538
 539         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 540         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 541         if (show) {
 542             Q_ASSERT(!list.contains(info));
 543             list.append(info);
 544         } else {
 545             Q_ASSERT(list.contains(info));
 546             const int index = list.indexOf(info);
 547             list.removeAt(index);
 548         }
 549
 550         m_controller->indicateAdditionalInfoChange(list);
 551         setColumnHidden(columnIndex, !show);
 552     }
 553 }
 554
 555 void DolphinDetailsView::updateColumnVisibility()
 556 {
 557     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 558     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 559         const KFileItemDelegate::Information info = infoForColumn(i);
 560         const bool hide = !list.contains(info);
 561         if (isColumnHidden(i) != hide) {
 562             setColumnHidden(i, hide);
 563         }
 564     }
 565
 566     resizeColumns();
 567 }
 568
 569 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 570 {
 571     Q_UNUSED(logicalIndex);
 572     Q_UNUSED(oldSize);
 573     Q_UNUSED(newSize);
 574     if (QApplication::mouseButtons() & Qt::LeftButton) {
 575         disableAutoResizing();
 576     }
 577 }
 578
 579 void DolphinDetailsView::slotActivationChanged(bool active)
 580 {
 581     setAlternatingRowColors(active);
 582 }
 583
 584 void DolphinDetailsView::disableAutoResizing()
 585 {
 586     m_autoResize = false;
 587 }
 588
 589 void DolphinDetailsView::requestActivation()
 590 {
 591     m_controller->requestActivation();
 592 }
 593
 594 void DolphinDetailsView::updateFont()
 595 {
 596     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 597     Q_ASSERT(settings != 0);
 598
 599     if (settings->useSystemFont()) {
 600         m_font = KGlobalSettings::generalFont();
 601     }
 602 }
 603
 604 void DolphinDetailsView::updateDecorationSize(bool showPreview)
 605 {
 606     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 607     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 608     setIconSize(QSize(iconSize, iconSize));
 609     m_decorationSize = QSize(iconSize, iconSize);
 610
 611     if (m_selectionManager != 0) {
 612         m_selectionManager->reset();
 613     }
 614
 615     doItemsLayout();
 616 }
 617
 618 QPoint DolphinDetailsView::contentsPos() const
 619 {
 620     // implementation note: the horizonal position is ignored currently, as no
 621     // horizontal scrolling is done anyway during a selection
 622     const QScrollBar* scrollbar = verticalScrollBar();
 623     Q_ASSERT(scrollbar != 0);
 624
 625     const int maxHeight = maximumViewportSize().height();
 626     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 627     const int visibleHeight = model()->rowCount() + 1 - height;
 628     if (visibleHeight <= 0) {
 629         return QPoint(0, 0);
 630     }
 631
 632     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 633     return QPoint(0, y);
 634 }
 635
 636 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 637 {
 638     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 639
 640     switch (columnIndex) {
 641     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 642     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 643     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 644     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 645     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 646     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 647     default: break;
 648     }
 649
 650     return info;
 651 }
 652
 653 void DolphinDetailsView::resizeColumns()
 654 {
 655     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 656     // around 3 seconds for each (!) resize operation when having > 10000 items).
 657     // This gets a problem especially when opening large directories, where several
 658     // resize operations are received for showing the currently available items during
 659     // loading (the application hangs around 20 seconds when loading > 10000 items).
 660
 661     QHeaderView* headerView = header();
 662     QFontMetrics fontMetrics(viewport()->font());
 663
 664     int columnWidth[KDirModel::ColumnCount];
 665     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 666     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 667     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 668     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 669     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 670     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 671
 672     int requiredWidth = 0;
 673     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 674         if (!isColumnHidden(i)) {
 675             columnWidth[i] += 20; // provide a default gap
 676             requiredWidth += columnWidth[i];
 677             headerView->resizeSection(i, columnWidth[i]);
 678         }
 679     }
 680
 681     // resize the name column in a way that the whole available width is used
 682     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 683     if (columnWidth[KDirModel::Name] < 120) {
 684         columnWidth[KDirModel::Name] = 120;
 685     }
 686     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 687 }
 688
 689 #include "dolphindetailsview.moc"