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         if (QApplication::mouseButtons() & Qt::MidButton) {
 210             m_controller->replaceUrlByClipboard();
 211         }
 212
 213         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 214         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 215             clearSelection();
 216         }
 217     }
 218
 219     if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 220         m_showElasticBand = true;
 221
 222         const QPoint pos(contentsPos());
 223         m_elasticBandOrigin = event->pos();
 224         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 225         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 226         m_elasticBandDestination = event->pos();
 227     }
 228 }
 229
 230 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 231 {
 232     if (m_showElasticBand) {
 233         const QPoint mousePos = event->pos();
 234         const QModelIndex index = indexAt(mousePos);
 235         if (!index.isValid()) {
 236             // the destination of the selection rectangle is above the viewport. In this
 237             // case QTreeView does no selection at all, which is not the wanted behavior
 238             // in Dolphin -> select all items within the elastic band rectangle
 239             clearSelection();
 240
 241             const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 242             QRect selRect = QRect(m_elasticBandOrigin, m_elasticBandDestination).normalized();
 243             const QRect nameColumnsRect(0, 0, nameColumnWidth, viewport()->height());
 244             selRect = nameColumnsRect.intersected(selRect);
 245
 246             setSelection(selRect, QItemSelectionModel::Select);
 247         }
 248
 249         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 250         // as the Qt-issue #199631 has been fixed.
 251         // QTreeView::mouseMoveEvent(event);
 252         QAbstractItemView::mouseMoveEvent(event);
 253         updateElasticBand();
 254     } else {
 255         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 256         // as the Qt-issue #199631 has been fixed.
 257         // QTreeView::mouseMoveEvent(event);
 258         QAbstractItemView::mouseMoveEvent(event);
 259     }
 260
 261     if (m_expandingTogglePressed) {
 262         // Per default QTreeView starts either a selection or a drag operation when dragging
 263         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 264         // Turn off this behavior in Dolphin to stay predictable:
 265         clearSelection();
 266         setState(QAbstractItemView::NoState);
 267     }
 268 }
 269
 270 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 271 {
 272     QTreeView::mouseReleaseEvent(event);
 273     m_expandingTogglePressed = false;
 274     if (m_showElasticBand) {
 275         updateElasticBand();
 276         m_showElasticBand = false;
 277     }
 278 }
 279
 280 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 281 {
 282     DragAndDropHelper::startDrag(this, supportedActions);
 283     m_showElasticBand = false;
 284 }
 285
 286 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 287 {
 288     if (event->mimeData()->hasUrls()) {
 289         event->acceptProposedAction();
 290     }
 291
 292     if (m_showElasticBand) {
 293         updateElasticBand();
 294         m_showElasticBand = false;
 295     }
 296 }
 297
 298 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 299 {
 300     QTreeView::dragLeaveEvent(event);
 301     setDirtyRegion(m_dropRect);
 302 }
 303
 304 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 305 {
 306     QTreeView::dragMoveEvent(event);
 307
 308     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 309     setDirtyRegion(m_dropRect);
 310     const QModelIndex index = indexAt(event->pos());
 311     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 312         const KFileItem item = m_controller->itemForIndex(index);
 313         if (!item.isNull() && item.isDir()) {
 314             m_dropRect = visualRect(index);
 315         } else {
 316             m_dropRect.setSize(QSize()); // set as invalid
 317         }
 318         setDirtyRegion(m_dropRect);
 319     }
 320
 321     if (event->mimeData()->hasUrls()) {
 322         // accept url drops, independently from the destination item
 323         event->acceptProposedAction();
 324     }
 325 }
 326
 327 void DolphinDetailsView::dropEvent(QDropEvent* event)
 328 {
 329     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 330     if (!urls.isEmpty()) {
 331         event->acceptProposedAction();
 332         const QModelIndex index = indexAt(event->pos());
 333         KFileItem item;
 334         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 335             item = m_controller->itemForIndex(index);
 336         }
 337         m_controller->indicateDroppedUrls(urls,
 338                                           m_controller->url(),
 339                                           item);
 340     }
 341     QTreeView::dropEvent(event);
 342 }
 343
 344 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 345 {
 346     QTreeView::paintEvent(event);
 347     if (m_showElasticBand) {
 348         // The following code has been taken from QListView
 349         // and adapted to DolphinDetailsView.
 350         // (C) 1992-2007 Trolltech ASA
 351         QStyleOptionRubberBand opt;
 352         opt.initFrom(this);
 353         opt.shape = QRubberBand::Rectangle;
 354         opt.opaque = false;
 355         opt.rect = elasticBandRect();
 356
 357         QPainter painter(viewport());
 358         painter.save();
 359         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 360         painter.restore();
 361     }
 362 }
 363
 364 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 365 {
 366     QTreeView::keyPressEvent(event);
 367     m_controller->handleKeyPressEvent(event);
 368     m_keyPressed = true;
 369 }
 370
 371 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 372 {
 373     QTreeView::keyReleaseEvent(event);
 374     m_keyPressed = false;
 375 }
 376
 377 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 378 {
 379     if (m_autoResize) {
 380         resizeColumns();
 381     }
 382     QTreeView::resizeEvent(event);
 383 }
 384
 385 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 386 {
 387     if (m_selectionManager != 0) {
 388         m_selectionManager->reset();
 389     }
 390
 391     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 392     if (event->modifiers() & Qt::ControlModifier) {
 393         event->ignore();
 394         return;
 395     }
 396
 397     QTreeView::wheelEvent(event);
 398 }
 399
 400 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 401 {
 402     QTreeView::currentChanged(current, previous);
 403
 404     // Stay consistent with QListView: When changing the current index by key presses,
 405     // also change the selection.
 406     if (m_keyPressed) {
 407         selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 408     }
 409 }
 410
 411 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 412 {
 413     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 414         // if the mouse is above an item and moved very fast outside the widget,
 415         // no viewportEntered() signal might be emitted although the mouse has been moved
 416         // above the viewport
 417         m_controller->emitViewportEntered();
 418     }
 419
 420     return QTreeView::eventFilter(watched, event);
 421 }
 422
 423 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 424 {
 425     QHeaderView* headerView = header();
 426     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 427 }
 428
 429 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 430 {
 431     QHeaderView* headerView = header();
 432     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 433 }
 434
 435 void DolphinDetailsView::synchronizeSortingState(int column)
 436 {
 437     // The sorting has already been changed in QTreeView if this slot is
 438     // invoked, but Dolphin is not informed about this.
 439     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 440     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 441     m_controller->indicateSortingChange(sorting);
 442     m_controller->indicateSortOrderChange(sortOrder);
 443 }
 444
 445 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 446 {
 447     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 448     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 449     if (pos.x() < nameColumnWidth) {
 450         m_controller->emitItemEntered(index);
 451     }
 452     else {
 453         m_controller->emitViewportEntered();
 454     }
 455 }
 456
 457 void DolphinDetailsView::updateElasticBand()
 458 {
 459     if (m_showElasticBand) {
 460         QRect dirtyRegion(elasticBandRect());
 461         m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 462         dirtyRegion = dirtyRegion.united(elasticBandRect());
 463         setDirtyRegion(dirtyRegion);
 464     }
 465 }
 466
 467 QRect DolphinDetailsView::elasticBandRect() const
 468 {
 469     const QPoint pos(contentsPos());
 470     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 471     return QRect(topLeft, m_elasticBandDestination).normalized();
 472 }
 473
 474 void DolphinDetailsView::zoomIn()
 475 {
 476     if (isZoomInPossible()) {
 477         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 478         switch (settings->iconSize()) {
 479         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 480         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 481         default: Q_ASSERT(false); break;
 482         }
 483         updateDecorationSize();
 484     }
 485 }
 486
 487 void DolphinDetailsView::zoomOut()
 488 {
 489     if (isZoomOutPossible()) {
 490         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 491         switch (settings->iconSize()) {
 492         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 493         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 494         default: Q_ASSERT(false); break;
 495         }
 496         updateDecorationSize();
 497     }
 498 }
 499
 500 void DolphinDetailsView::configureColumns(const QPoint& pos)
 501 {
 502     KMenu popup(this);
 503     popup.addTitle(i18nc("@title:menu", "Columns"));
 504
 505     QHeaderView* headerView = header();
 506     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 507         const int logicalIndex = headerView->logicalIndex(i);
 508         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 509         QAction* action = popup.addAction(text);
 510         action->setCheckable(true);
 511         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 512         action->setData(i);
 513     }
 514
 515     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 516     if (activatedAction != 0) {
 517         const bool show = activatedAction->isChecked();
 518         const int columnIndex = activatedAction->data().toInt();
 519
 520         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 521         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 522         if (show) {
 523             Q_ASSERT(!list.contains(info));
 524             list.append(info);
 525         } else {
 526             Q_ASSERT(list.contains(info));
 527             const int index = list.indexOf(info);
 528             list.removeAt(index);
 529         }
 530
 531         m_controller->indicateAdditionalInfoChange(list);
 532         setColumnHidden(columnIndex, !show);
 533     }
 534 }
 535
 536 void DolphinDetailsView::updateColumnVisibility()
 537 {
 538     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 539     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 540         const KFileItemDelegate::Information info = infoForColumn(i);
 541         const bool hide = !list.contains(info);
 542         if (isColumnHidden(i) != hide) {
 543             setColumnHidden(i, hide);
 544         }
 545     }
 546
 547     resizeColumns();
 548 }
 549
 550 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 551 {
 552     Q_UNUSED(logicalIndex);
 553     Q_UNUSED(oldSize);
 554     Q_UNUSED(newSize);
 555     if (QApplication::mouseButtons() & Qt::LeftButton) {
 556         disableAutoResizing();
 557     }
 558 }
 559
 560 void DolphinDetailsView::disableAutoResizing()
 561 {
 562     m_autoResize = false;
 563 }
 564
 565 void DolphinDetailsView::requestActivation()
 566 {
 567     m_controller->requestActivation();
 568 }
 569
 570 void DolphinDetailsView::updateFont()
 571 {
 572     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 573     Q_ASSERT(settings != 0);
 574
 575     if (settings->useSystemFont()) {
 576         m_font = KGlobalSettings::generalFont();
 577     }
 578 }
 579
 580 bool DolphinDetailsView::isZoomInPossible() const
 581 {
 582     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 583     return settings->iconSize() < KIconLoader::SizeLarge;
 584 }
 585
 586 bool DolphinDetailsView::isZoomOutPossible() const
 587 {
 588     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 589     return settings->iconSize() > KIconLoader::SizeSmall;
 590 }
 591
 592 void DolphinDetailsView::updateDecorationSize()
 593 {
 594     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 595     const int iconSize = settings->iconSize();
 596     setIconSize(QSize(iconSize, iconSize));
 597     m_decorationSize = QSize(iconSize, iconSize);
 598
 599     m_controller->setZoomInPossible(isZoomInPossible());
 600     m_controller->setZoomOutPossible(isZoomOutPossible());
 601
 602     if (m_selectionManager != 0) {
 603         m_selectionManager->reset();
 604     }
 605
 606     doItemsLayout();
 607 }
 608
 609 QPoint DolphinDetailsView::contentsPos() const
 610 {
 611     // implementation note: the horizonal position is ignored currently, as no
 612     // horizontal scrolling is done anyway during a selection
 613     const QScrollBar* scrollbar = verticalScrollBar();
 614     Q_ASSERT(scrollbar != 0);
 615
 616     const int maxHeight = maximumViewportSize().height();
 617     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 618     const int visibleHeight = model()->rowCount() + 1 - height;
 619     if (visibleHeight <= 0) {
 620         return QPoint(0, 0);
 621     }
 622
 623     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 624     return QPoint(0, y);
 625 }
 626
 627 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 628 {
 629     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 630
 631     switch (columnIndex) {
 632     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 633     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 634     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 635     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 636     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 637     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 638     default: break;
 639     }
 640
 641     return info;
 642 }
 643
 644 void DolphinDetailsView::resizeColumns()
 645 {
 646     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 647     // around 3 seconds for each (!) resize operation when having > 10000 items).
 648     // This gets a problem especially when opening large directories, where several
 649     // resize operations are received for showing the currently available items during
 650     // loading (the application hangs around 20 seconds when loading > 10000 items).
 651
 652     QHeaderView* headerView = header();
 653     QFontMetrics fontMetrics(viewport()->font());
 654
 655     int columnWidth[KDirModel::ColumnCount];
 656     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 657     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 658     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 659     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 660     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 661     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 662
 663     int requiredWidth = 0;
 664     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 665         if (!isColumnHidden(i)) {
 666             columnWidth[i] += 20; // provide a default gap
 667             requiredWidth += columnWidth[i];
 668             headerView->resizeSection(i, columnWidth[i]);
 669         }
 670     }
 671
 672     // resize the name column in a way that the whole available width is used
 673     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 674     if (columnWidth[KDirModel::Name] < 120) {
 675         columnWidth[KDirModel::Name] = 120;
 676     }
 677     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 678 }
 679
 680 #include "dolphindetailsview.moc"