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 #include "zoomlevelinfo.h"
  31
  32 #include "dolphin_detailsmodesettings.h"
  33 #include "dolphin_generalsettings.h"
  34
  35 #include <kdirmodel.h>
  36 #include <klocale.h>
  37 #include <kmenu.h>
  38
  39 #include <QAbstractProxyModel>
  40 #include <QAction>
  41 #include <QApplication>
  42 #include <QHeaderView>
  43 #include <QRubberBand>
  44 #include <QPainter>
  45 #include <QScrollBar>
  46
  47 DolphinDetailsView::DolphinDetailsView(QWidget* parent, DolphinController* controller) :
  48     QTreeView(parent),
  49         m_autoResize(true),
  50     m_expandingTogglePressed(false),
  51     m_keyPressed(false),
  52     m_controller(controller),
  53     m_selectionManager(0),
  54     m_font(),
  55     m_decorationSize(),
  56     m_showElasticBand(false),
  57     m_elasticBandOrigin(),
  58     m_elasticBandDestination()
  59 {
  60     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  61     Q_ASSERT(settings != 0);
  62     Q_ASSERT(controller != 0);
  63
  64     setLayoutDirection(Qt::LeftToRight);
  65     setAcceptDrops(true);
  66     setSortingEnabled(true);
  67     setUniformRowHeights(true);
  68     setSelectionBehavior(SelectItems);
  69     setDragDropMode(QAbstractItemView::DragDrop);
  70     setDropIndicatorShown(false);
  71     setAlternatingRowColors(true);
  72     setRootIsDecorated(settings->expandableFolders());
  73     setItemsExpandable(settings->expandableFolders());
  74     setEditTriggers(QAbstractItemView::NoEditTriggers);
  75
  76     setMouseTracking(true);
  77
  78     const ViewProperties props(controller->url());
  79     setSortIndicatorSection(props.sorting());
  80     setSortIndicatorOrder(props.sortOrder());
  81
  82     QHeaderView* headerView = header();
  83     connect(headerView, SIGNAL(sectionClicked(int)),
  84             this, SLOT(synchronizeSortingState(int)));
  85     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  86     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  87             this, SLOT(configureColumns(const QPoint&)));
  88     connect(headerView, SIGNAL(sectionResized(int, int, int)),
  89             this, SLOT(slotHeaderSectionResized(int, int, int)));
  90     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
  91             this, SLOT(disableAutoResizing()));
  92
  93     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  94             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  95     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  96             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  97
  98     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  99     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
 100     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
 101     // RETURN-key in keyPressEvent().
 102     if (KGlobalSettings::singleClick()) {
 103         connect(this, SIGNAL(clicked(const QModelIndex&)),
 104                 controller, SLOT(triggerItem(const QModelIndex&)));
 105     } else {
 106         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 107                 controller, SLOT(triggerItem(const QModelIndex&)));
 108     }
 109
 110     if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
 111         m_selectionManager = new SelectionManager(this);
 112         connect(m_selectionManager, SIGNAL(selectionChanged()),
 113                 this, SLOT(requestActivation()));
 114         connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
 115                 m_selectionManager, SLOT(reset()));
 116     }
 117
 118     connect(this, SIGNAL(entered(const QModelIndex&)),
 119             this, SLOT(slotEntered(const QModelIndex&)));
 120     connect(this, SIGNAL(viewportEntered()),
 121             controller, SLOT(emitViewportEntered()));
 122     connect(controller, SIGNAL(zoomLevelChanged(int)),
 123             this, SLOT(setZoomLevel(int)));
 124     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged()),
 125             this, SLOT(updateColumnVisibility()));
 126     connect(controller, SIGNAL(activationChanged(bool)),
 127             this, SLOT(slotActivationChanged(bool)));
 128
 129     if (settings->useSystemFont()) {
 130         m_font = KGlobalSettings::generalFont();
 131     } else {
 132         m_font = QFont(settings->fontFamily(),
 133                        settings->fontSize(),
 134                        settings->fontWeight(),
 135                        settings->italicFont());
 136     }
 137
 138     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 139     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 140
 141     const DolphinView* view = controller->dolphinView();
 142     connect(view, SIGNAL(showPreviewChanged()),
 143             this, SLOT(slotShowPreviewChanged()));
 144
 145     updateDecorationSize(view->showPreview());
 146
 147     setFocus();
 148     viewport()->installEventFilter(this);
 149
 150     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 151             this, SLOT(updateFont()));
 152 }
 153
 154 DolphinDetailsView::~DolphinDetailsView()
 155 {
 156 }
 157
 158 bool DolphinDetailsView::event(QEvent* event)
 159 {
 160     if (event->type() == QEvent::Polish) {
 161         QHeaderView* headerView = header();
 162         headerView->setResizeMode(QHeaderView::Interactive);
 163         headerView->setMovable(false);
 164
 165         updateColumnVisibility();
 166
 167         hideColumn(DolphinModel::Rating);
 168         hideColumn(DolphinModel::Tags);
 169     } else if (event->type() == QEvent::UpdateRequest) {
 170         // a wheel movement will scroll 4 items
 171         if (model()->rowCount() > 0) {
 172             verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
 173         }
 174     }
 175
 176     return QTreeView::event(event);
 177 }
 178
 179 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 180 {
 181     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 182     viewOptions.font = m_font;
 183     viewOptions.showDecorationSelected = true;
 184     viewOptions.decorationSize = m_decorationSize;
 185     return viewOptions;
 186 }
 187
 188 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 189 {
 190     QTreeView::contextMenuEvent(event);
 191     m_controller->triggerContextMenuRequest(event->pos());
 192 }
 193
 194 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 195 {
 196     m_controller->requestActivation();
 197
 198     const QModelIndex current = currentIndex();
 199     QTreeView::mousePressEvent(event);
 200
 201     m_expandingTogglePressed = false;
 202     const QModelIndex index = indexAt(event->pos());
 203     const bool updateState = index.isValid() &&
 204                              (index.column() == DolphinModel::Name) &&
 205                              (event->button() == Qt::LeftButton);
 206     if (updateState) {
 207         // TODO: See comment in DolphinIconsView::mousePressEvent(). Only update
 208         // the state if no expanding/collapsing area has been hit:
 209         const QRect rect = visualRect(index);
 210         if (event->pos().x() >= rect.x() + indentation()) {
 211             setState(QAbstractItemView::DraggingState);
 212         } else {
 213             m_expandingTogglePressed = true;
 214         }
 215     }
 216
 217     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 218         if (QApplication::mouseButtons() & Qt::MidButton) {
 219             m_controller->replaceUrlByClipboard();
 220         }
 221
 222         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 223         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 224             clearSelection();
 225         }
 226
 227         // restore the current index, other columns are handled as viewport area
 228         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 229     }
 230
 231     if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 232         m_showElasticBand = true;
 233
 234         const QPoint pos(contentsPos());
 235         m_elasticBandOrigin = event->pos();
 236         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 237         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 238         m_elasticBandDestination = event->pos();
 239     }
 240 }
 241
 242 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 243 {
 244     if (m_showElasticBand) {
 245         const QPoint mousePos = event->pos();
 246         const QModelIndex index = indexAt(mousePos);
 247         if (!index.isValid()) {
 248             // the destination of the selection rectangle is above the viewport. In this
 249             // case QTreeView does no selection at all, which is not the wanted behavior
 250             // in Dolphin -> select all items within the elastic band rectangle
 251             clearSelection();
 252
 253             const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 254             QRect selRect = QRect(m_elasticBandOrigin, m_elasticBandDestination).normalized();
 255             const QRect nameColumnsRect(0, 0, nameColumnWidth, viewport()->height());
 256             selRect = nameColumnsRect.intersected(selRect);
 257
 258             setSelection(selRect, QItemSelectionModel::Select);
 259         }
 260
 261         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 262         // as the Qt-issue #199631 has been fixed.
 263         // QTreeView::mouseMoveEvent(event);
 264         QAbstractItemView::mouseMoveEvent(event);
 265         updateElasticBand();
 266     } else {
 267         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 268         // as the Qt-issue #199631 has been fixed.
 269         // QTreeView::mouseMoveEvent(event);
 270         QAbstractItemView::mouseMoveEvent(event);
 271     }
 272
 273     if (m_expandingTogglePressed) {
 274         // Per default QTreeView starts either a selection or a drag operation when dragging
 275         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 276         // Turn off this behavior in Dolphin to stay predictable:
 277         clearSelection();
 278         setState(QAbstractItemView::NoState);
 279     }
 280 }
 281
 282 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 283 {
 284     const QModelIndex index = indexAt(event->pos());
 285     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 286         QTreeView::mouseReleaseEvent(event);
 287     } else {
 288         // don't change the current index if the cursor is released
 289         // above any other column than the name column, as the other
 290         // columns act as viewport
 291         const QModelIndex current = currentIndex();
 292         QTreeView::mouseReleaseEvent(event);
 293         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 294     }
 295
 296     m_expandingTogglePressed = false;
 297     if (m_showElasticBand) {
 298         updateElasticBand();
 299         m_showElasticBand = false;
 300     }
 301 }
 302
 303 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 304 {
 305     DragAndDropHelper::startDrag(this, supportedActions);
 306     m_showElasticBand = false;
 307 }
 308
 309 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 310 {
 311     if (event->mimeData()->hasUrls()) {
 312         event->acceptProposedAction();
 313     }
 314
 315     if (m_showElasticBand) {
 316         updateElasticBand();
 317         m_showElasticBand = false;
 318     }
 319 }
 320
 321 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 322 {
 323     QTreeView::dragLeaveEvent(event);
 324     setDirtyRegion(m_dropRect);
 325 }
 326
 327 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 328 {
 329     QTreeView::dragMoveEvent(event);
 330
 331     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 332     setDirtyRegion(m_dropRect);
 333     const QModelIndex index = indexAt(event->pos());
 334     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 335         const KFileItem item = m_controller->itemForIndex(index);
 336         if (!item.isNull() && item.isDir()) {
 337             m_dropRect = visualRect(index);
 338         } else {
 339             m_dropRect.setSize(QSize()); // set as invalid
 340         }
 341         setDirtyRegion(m_dropRect);
 342     }
 343
 344     if (event->mimeData()->hasUrls()) {
 345         // accept url drops, independently from the destination item
 346         event->acceptProposedAction();
 347     }
 348 }
 349
 350 void DolphinDetailsView::dropEvent(QDropEvent* event)
 351 {
 352     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 353     if (!urls.isEmpty()) {
 354         event->acceptProposedAction();
 355         const QModelIndex index = indexAt(event->pos());
 356         KFileItem item;
 357         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 358             item = m_controller->itemForIndex(index);
 359         }
 360         m_controller->indicateDroppedUrls(urls,
 361                                           m_controller->url(),
 362                                           item);
 363     }
 364     QTreeView::dropEvent(event);
 365 }
 366
 367 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 368 {
 369     QTreeView::paintEvent(event);
 370     if (m_showElasticBand) {
 371         // The following code has been taken from QListView
 372         // and adapted to DolphinDetailsView.
 373         // (C) 1992-2007 Trolltech ASA
 374         QStyleOptionRubberBand opt;
 375         opt.initFrom(this);
 376         opt.shape = QRubberBand::Rectangle;
 377         opt.opaque = false;
 378         opt.rect = elasticBandRect();
 379
 380         QPainter painter(viewport());
 381         painter.save();
 382         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 383         painter.restore();
 384     }
 385 }
 386
 387 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 388 {
 389     // If the Control modifier is pressed, a multiple selection
 390     // is done and DolphinDetailsView::currentChanged() may not
 391     // not change the selection in a custom way.
 392     m_keyPressed = !(event->modifiers() & Qt::ControlModifier);
 393
 394     QTreeView::keyPressEvent(event);
 395     m_controller->handleKeyPressEvent(event);
 396 }
 397
 398 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 399 {
 400     QTreeView::keyReleaseEvent(event);
 401     m_keyPressed = false;
 402 }
 403
 404 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 405 {
 406     if (m_autoResize) {
 407         resizeColumns();
 408     }
 409     QTreeView::resizeEvent(event);
 410 }
 411
 412 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 413 {
 414     if (m_selectionManager != 0) {
 415         m_selectionManager->reset();
 416     }
 417
 418     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 419     if (event->modifiers() & Qt::ControlModifier) {
 420         event->ignore();
 421         return;
 422     }
 423
 424     QTreeView::wheelEvent(event);
 425 }
 426
 427 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 428 {
 429     QTreeView::currentChanged(current, previous);
 430
 431     // Stay consistent with QListView: When changing the current index by key presses,
 432     // also change the selection.
 433     if (m_keyPressed) {
 434         selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 435     }
 436 }
 437
 438 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 439 {
 440     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 441         // if the mouse is above an item and moved very fast outside the widget,
 442         // no viewportEntered() signal might be emitted although the mouse has been moved
 443         // above the viewport
 444         m_controller->emitViewportEntered();
 445     }
 446
 447     return QTreeView::eventFilter(watched, event);
 448 }
 449
 450 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 451 {
 452     QHeaderView* headerView = header();
 453     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 454 }
 455
 456 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 457 {
 458     QHeaderView* headerView = header();
 459     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 460 }
 461
 462 void DolphinDetailsView::synchronizeSortingState(int column)
 463 {
 464     // The sorting has already been changed in QTreeView if this slot is
 465     // invoked, but Dolphin is not informed about this.
 466     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 467     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 468     m_controller->indicateSortingChange(sorting);
 469     m_controller->indicateSortOrderChange(sortOrder);
 470 }
 471
 472 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 473 {
 474     if (index.column() == DolphinModel::Name) {
 475         m_controller->emitItemEntered(index);
 476     } else {
 477         m_controller->emitViewportEntered();
 478     }
 479 }
 480
 481 void DolphinDetailsView::updateElasticBand()
 482 {
 483     if (m_showElasticBand) {
 484         QRect dirtyRegion(elasticBandRect());
 485         m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 486         dirtyRegion = dirtyRegion.united(elasticBandRect());
 487         setDirtyRegion(dirtyRegion);
 488     }
 489 }
 490
 491 QRect DolphinDetailsView::elasticBandRect() const
 492 {
 493     const QPoint pos(contentsPos());
 494     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 495     return QRect(topLeft, m_elasticBandDestination).normalized();
 496 }
 497
 498 void DolphinDetailsView::setZoomLevel(int level)
 499 {
 500     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 501     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 502
 503     const bool showPreview = m_controller->dolphinView()->showPreview();
 504     if (showPreview) {
 505         settings->setPreviewSize(size);
 506     } else {
 507         settings->setIconSize(size);
 508     }
 509
 510     updateDecorationSize(showPreview);
 511 }
 512
 513
 514 void DolphinDetailsView::slotShowPreviewChanged()
 515 {
 516     const DolphinView* view = m_controller->dolphinView();
 517     updateDecorationSize(view->showPreview());
 518 }
 519
 520 void DolphinDetailsView::configureColumns(const QPoint& pos)
 521 {
 522     KMenu popup(this);
 523     popup.addTitle(i18nc("@title:menu", "Columns"));
 524
 525     QHeaderView* headerView = header();
 526     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 527         const int logicalIndex = headerView->logicalIndex(i);
 528         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 529         QAction* action = popup.addAction(text);
 530         action->setCheckable(true);
 531         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 532         action->setData(i);
 533     }
 534
 535     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 536     if (activatedAction != 0) {
 537         const bool show = activatedAction->isChecked();
 538         const int columnIndex = activatedAction->data().toInt();
 539
 540         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 541         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 542         if (show) {
 543             Q_ASSERT(!list.contains(info));
 544             list.append(info);
 545         } else {
 546             Q_ASSERT(list.contains(info));
 547             const int index = list.indexOf(info);
 548             list.removeAt(index);
 549         }
 550
 551         m_controller->indicateAdditionalInfoChange(list);
 552         setColumnHidden(columnIndex, !show);
 553     }
 554 }
 555
 556 void DolphinDetailsView::updateColumnVisibility()
 557 {
 558     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 559     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 560         const KFileItemDelegate::Information info = infoForColumn(i);
 561         const bool hide = !list.contains(info);
 562         if (isColumnHidden(i) != hide) {
 563             setColumnHidden(i, hide);
 564         }
 565     }
 566
 567     resizeColumns();
 568 }
 569
 570 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 571 {
 572     Q_UNUSED(logicalIndex);
 573     Q_UNUSED(oldSize);
 574     Q_UNUSED(newSize);
 575     if (QApplication::mouseButtons() & Qt::LeftButton) {
 576         disableAutoResizing();
 577     }
 578 }
 579
 580 void DolphinDetailsView::slotActivationChanged(bool active)
 581 {
 582     setAlternatingRowColors(active);
 583 }
 584
 585 void DolphinDetailsView::disableAutoResizing()
 586 {
 587     m_autoResize = false;
 588 }
 589
 590 void DolphinDetailsView::requestActivation()
 591 {
 592     m_controller->requestActivation();
 593 }
 594
 595 void DolphinDetailsView::updateFont()
 596 {
 597     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 598     Q_ASSERT(settings != 0);
 599
 600     if (settings->useSystemFont()) {
 601         m_font = KGlobalSettings::generalFont();
 602     }
 603 }
 604
 605 void DolphinDetailsView::updateDecorationSize(bool showPreview)
 606 {
 607     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 608     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 609     setIconSize(QSize(iconSize, iconSize));
 610     m_decorationSize = QSize(iconSize, iconSize);
 611
 612     if (m_selectionManager != 0) {
 613         m_selectionManager->reset();
 614     }
 615
 616     doItemsLayout();
 617 }
 618
 619 QPoint DolphinDetailsView::contentsPos() const
 620 {
 621     // implementation note: the horizonal position is ignored currently, as no
 622     // horizontal scrolling is done anyway during a selection
 623     const QScrollBar* scrollbar = verticalScrollBar();
 624     Q_ASSERT(scrollbar != 0);
 625
 626     const int maxHeight = maximumViewportSize().height();
 627     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 628     const int visibleHeight = model()->rowCount() + 1 - height;
 629     if (visibleHeight <= 0) {
 630         return QPoint(0, 0);
 631     }
 632
 633     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 634     return QPoint(0, y);
 635 }
 636
 637 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 638 {
 639     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 640
 641     switch (columnIndex) {
 642     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 643     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 644     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 645     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 646     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 647     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 648     default: break;
 649     }
 650
 651     return info;
 652 }
 653
 654 void DolphinDetailsView::resizeColumns()
 655 {
 656     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 657     // around 3 seconds for each (!) resize operation when having > 10000 items).
 658     // This gets a problem especially when opening large directories, where several
 659     // resize operations are received for showing the currently available items during
 660     // loading (the application hangs around 20 seconds when loading > 10000 items).
 661
 662     QHeaderView* headerView = header();
 663     QFontMetrics fontMetrics(viewport()->font());
 664
 665     int columnWidth[KDirModel::ColumnCount];
 666     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 667     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 668     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 669     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 670     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 671     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 672
 673     int requiredWidth = 0;
 674     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 675         if (!isColumnHidden(i)) {
 676             columnWidth[i] += 20; // provide a default gap
 677             requiredWidth += columnWidth[i];
 678             headerView->resizeSection(i, columnWidth[i]);
 679         }
 680     }
 681
 682     // resize the name column in a way that the whole available width is used
 683     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 684     if (columnWidth[KDirModel::Name] < 120) {
 685         columnWidth[KDirModel::Name] = 120;
 686     }
 687     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 688 }
 689
 690 #include "dolphindetailsview.moc"