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     const QModelIndex current = currentIndex();
 191     QTreeView::mousePressEvent(event);
 192
 193     m_expandingTogglePressed = false;
 194     const QModelIndex index = indexAt(event->pos());
 195     const bool updateState = index.isValid() &&
 196                              (index.column() == DolphinModel::Name) &&
 197                              (event->button() == Qt::LeftButton);
 198     if (updateState) {
 199         // TODO: See comment in DolphinIconsView::mousePressEvent(). Only update
 200         // the state if no expanding/collapsing area has been hit:
 201         const QRect rect = visualRect(index);
 202         if (event->pos().x() >= rect.x() + indentation()) {
 203             setState(QAbstractItemView::DraggingState);
 204         } else {
 205             m_expandingTogglePressed = true;
 206         }
 207     }
 208
 209     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 210         if (QApplication::mouseButtons() & Qt::MidButton) {
 211             m_controller->replaceUrlByClipboard();
 212         }
 213
 214         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 215         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 216             clearSelection();
 217         }
 218
 219         // restore the current index, other columns are handled as viewport area
 220         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 221     }
 222
 223     if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 224         m_showElasticBand = true;
 225
 226         const QPoint pos(contentsPos());
 227         m_elasticBandOrigin = event->pos();
 228         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 229         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 230         m_elasticBandDestination = event->pos();
 231     }
 232 }
 233
 234 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 235 {
 236     if (m_showElasticBand) {
 237         const QPoint mousePos = event->pos();
 238         const QModelIndex index = indexAt(mousePos);
 239         if (!index.isValid()) {
 240             // the destination of the selection rectangle is above the viewport. In this
 241             // case QTreeView does no selection at all, which is not the wanted behavior
 242             // in Dolphin -> select all items within the elastic band rectangle
 243             clearSelection();
 244
 245             const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 246             QRect selRect = QRect(m_elasticBandOrigin, m_elasticBandDestination).normalized();
 247             const QRect nameColumnsRect(0, 0, nameColumnWidth, viewport()->height());
 248             selRect = nameColumnsRect.intersected(selRect);
 249
 250             setSelection(selRect, QItemSelectionModel::Select);
 251         }
 252
 253         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 254         // as the Qt-issue #199631 has been fixed.
 255         // QTreeView::mouseMoveEvent(event);
 256         QAbstractItemView::mouseMoveEvent(event);
 257         updateElasticBand();
 258     } else {
 259         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 260         // as the Qt-issue #199631 has been fixed.
 261         // QTreeView::mouseMoveEvent(event);
 262         QAbstractItemView::mouseMoveEvent(event);
 263     }
 264
 265     if (m_expandingTogglePressed) {
 266         // Per default QTreeView starts either a selection or a drag operation when dragging
 267         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 268         // Turn off this behavior in Dolphin to stay predictable:
 269         clearSelection();
 270         setState(QAbstractItemView::NoState);
 271     }
 272 }
 273
 274 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 275 {
 276     const QModelIndex index = indexAt(event->pos());
 277     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 278         QTreeView::mouseReleaseEvent(event);
 279     } else {
 280         // don't change the current index if the cursor is released
 281         // above any other column than the name column, as the other
 282         // columns act as viewport
 283         const QModelIndex current = currentIndex();
 284         QTreeView::mouseReleaseEvent(event);
 285         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 286     }
 287
 288     m_expandingTogglePressed = false;
 289     if (m_showElasticBand) {
 290         updateElasticBand();
 291         m_showElasticBand = false;
 292     }
 293 }
 294
 295 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 296 {
 297     DragAndDropHelper::startDrag(this, supportedActions);
 298     m_showElasticBand = false;
 299 }
 300
 301 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 302 {
 303     if (event->mimeData()->hasUrls()) {
 304         event->acceptProposedAction();
 305     }
 306
 307     if (m_showElasticBand) {
 308         updateElasticBand();
 309         m_showElasticBand = false;
 310     }
 311 }
 312
 313 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 314 {
 315     QTreeView::dragLeaveEvent(event);
 316     setDirtyRegion(m_dropRect);
 317 }
 318
 319 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 320 {
 321     QTreeView::dragMoveEvent(event);
 322
 323     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 324     setDirtyRegion(m_dropRect);
 325     const QModelIndex index = indexAt(event->pos());
 326     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 327         const KFileItem item = m_controller->itemForIndex(index);
 328         if (!item.isNull() && item.isDir()) {
 329             m_dropRect = visualRect(index);
 330         } else {
 331             m_dropRect.setSize(QSize()); // set as invalid
 332         }
 333         setDirtyRegion(m_dropRect);
 334     }
 335
 336     if (event->mimeData()->hasUrls()) {
 337         // accept url drops, independently from the destination item
 338         event->acceptProposedAction();
 339     }
 340 }
 341
 342 void DolphinDetailsView::dropEvent(QDropEvent* event)
 343 {
 344     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 345     if (!urls.isEmpty()) {
 346         event->acceptProposedAction();
 347         const QModelIndex index = indexAt(event->pos());
 348         KFileItem item;
 349         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 350             item = m_controller->itemForIndex(index);
 351         }
 352         m_controller->indicateDroppedUrls(urls,
 353                                           m_controller->url(),
 354                                           item);
 355     }
 356     QTreeView::dropEvent(event);
 357 }
 358
 359 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 360 {
 361     QTreeView::paintEvent(event);
 362     if (m_showElasticBand) {
 363         // The following code has been taken from QListView
 364         // and adapted to DolphinDetailsView.
 365         // (C) 1992-2007 Trolltech ASA
 366         QStyleOptionRubberBand opt;
 367         opt.initFrom(this);
 368         opt.shape = QRubberBand::Rectangle;
 369         opt.opaque = false;
 370         opt.rect = elasticBandRect();
 371
 372         QPainter painter(viewport());
 373         painter.save();
 374         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 375         painter.restore();
 376     }
 377 }
 378
 379 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 380 {
 381     // If the Control modifier is pressed, a multiple selection
 382     // is done and DolphinDetailsView::currentChanged() may not
 383     // not change the selection in a custom way.
 384     m_keyPressed = !(event->modifiers() & Qt::ControlModifier);
 385
 386     QTreeView::keyPressEvent(event);
 387     m_controller->handleKeyPressEvent(event);
 388 }
 389
 390 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 391 {
 392     QTreeView::keyReleaseEvent(event);
 393     m_keyPressed = false;
 394 }
 395
 396 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 397 {
 398     if (m_autoResize) {
 399         resizeColumns();
 400     }
 401     QTreeView::resizeEvent(event);
 402 }
 403
 404 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 405 {
 406     if (m_selectionManager != 0) {
 407         m_selectionManager->reset();
 408     }
 409
 410     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 411     if (event->modifiers() & Qt::ControlModifier) {
 412         event->ignore();
 413         return;
 414     }
 415
 416     QTreeView::wheelEvent(event);
 417 }
 418
 419 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 420 {
 421     QTreeView::currentChanged(current, previous);
 422
 423     // Stay consistent with QListView: When changing the current index by key presses,
 424     // also change the selection.
 425     if (m_keyPressed) {
 426         selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 427     }
 428 }
 429
 430 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 431 {
 432     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 433         // if the mouse is above an item and moved very fast outside the widget,
 434         // no viewportEntered() signal might be emitted although the mouse has been moved
 435         // above the viewport
 436         m_controller->emitViewportEntered();
 437     }
 438
 439     return QTreeView::eventFilter(watched, event);
 440 }
 441
 442 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 443 {
 444     QHeaderView* headerView = header();
 445     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 446 }
 447
 448 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 449 {
 450     QHeaderView* headerView = header();
 451     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 452 }
 453
 454 void DolphinDetailsView::synchronizeSortingState(int column)
 455 {
 456     // The sorting has already been changed in QTreeView if this slot is
 457     // invoked, but Dolphin is not informed about this.
 458     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 459     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 460     m_controller->indicateSortingChange(sorting);
 461     m_controller->indicateSortOrderChange(sortOrder);
 462 }
 463
 464 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 465 {
 466     if (index.column() == DolphinModel::Name) {
 467         m_controller->emitItemEntered(index);
 468     } else {
 469         m_controller->emitViewportEntered();
 470     }
 471 }
 472
 473 void DolphinDetailsView::updateElasticBand()
 474 {
 475     if (m_showElasticBand) {
 476         QRect dirtyRegion(elasticBandRect());
 477         m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 478         dirtyRegion = dirtyRegion.united(elasticBandRect());
 479         setDirtyRegion(dirtyRegion);
 480     }
 481 }
 482
 483 QRect DolphinDetailsView::elasticBandRect() const
 484 {
 485     const QPoint pos(contentsPos());
 486     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 487     return QRect(topLeft, m_elasticBandDestination).normalized();
 488 }
 489
 490 void DolphinDetailsView::zoomIn()
 491 {
 492     if (isZoomInPossible()) {
 493         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 494         switch (settings->iconSize()) {
 495         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 496         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 497         default: Q_ASSERT(false); break;
 498         }
 499         updateDecorationSize();
 500     }
 501 }
 502
 503 void DolphinDetailsView::zoomOut()
 504 {
 505     if (isZoomOutPossible()) {
 506         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 507         switch (settings->iconSize()) {
 508         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 509         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 510         default: Q_ASSERT(false); break;
 511         }
 512         updateDecorationSize();
 513     }
 514 }
 515
 516 void DolphinDetailsView::configureColumns(const QPoint& pos)
 517 {
 518     KMenu popup(this);
 519     popup.addTitle(i18nc("@title:menu", "Columns"));
 520
 521     QHeaderView* headerView = header();
 522     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 523         const int logicalIndex = headerView->logicalIndex(i);
 524         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 525         QAction* action = popup.addAction(text);
 526         action->setCheckable(true);
 527         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 528         action->setData(i);
 529     }
 530
 531     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 532     if (activatedAction != 0) {
 533         const bool show = activatedAction->isChecked();
 534         const int columnIndex = activatedAction->data().toInt();
 535
 536         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 537         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 538         if (show) {
 539             Q_ASSERT(!list.contains(info));
 540             list.append(info);
 541         } else {
 542             Q_ASSERT(list.contains(info));
 543             const int index = list.indexOf(info);
 544             list.removeAt(index);
 545         }
 546
 547         m_controller->indicateAdditionalInfoChange(list);
 548         setColumnHidden(columnIndex, !show);
 549     }
 550 }
 551
 552 void DolphinDetailsView::updateColumnVisibility()
 553 {
 554     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 555     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 556         const KFileItemDelegate::Information info = infoForColumn(i);
 557         const bool hide = !list.contains(info);
 558         if (isColumnHidden(i) != hide) {
 559             setColumnHidden(i, hide);
 560         }
 561     }
 562
 563     resizeColumns();
 564 }
 565
 566 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 567 {
 568     Q_UNUSED(logicalIndex);
 569     Q_UNUSED(oldSize);
 570     Q_UNUSED(newSize);
 571     if (QApplication::mouseButtons() & Qt::LeftButton) {
 572         disableAutoResizing();
 573     }
 574 }
 575
 576 void DolphinDetailsView::disableAutoResizing()
 577 {
 578     m_autoResize = false;
 579 }
 580
 581 void DolphinDetailsView::requestActivation()
 582 {
 583     m_controller->requestActivation();
 584 }
 585
 586 void DolphinDetailsView::updateFont()
 587 {
 588     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 589     Q_ASSERT(settings != 0);
 590
 591     if (settings->useSystemFont()) {
 592         m_font = KGlobalSettings::generalFont();
 593     }
 594 }
 595
 596 bool DolphinDetailsView::isZoomInPossible() const
 597 {
 598     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 599     return settings->iconSize() < KIconLoader::SizeLarge;
 600 }
 601
 602 bool DolphinDetailsView::isZoomOutPossible() const
 603 {
 604     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 605     return settings->iconSize() > KIconLoader::SizeSmall;
 606 }
 607
 608 void DolphinDetailsView::updateDecorationSize()
 609 {
 610     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 611     const int iconSize = settings->iconSize();
 612     setIconSize(QSize(iconSize, iconSize));
 613     m_decorationSize = QSize(iconSize, iconSize);
 614
 615     m_controller->setZoomInPossible(isZoomInPossible());
 616     m_controller->setZoomOutPossible(isZoomOutPossible());
 617
 618     if (m_selectionManager != 0) {
 619         m_selectionManager->reset();
 620     }
 621
 622     doItemsLayout();
 623 }
 624
 625 QPoint DolphinDetailsView::contentsPos() const
 626 {
 627     // implementation note: the horizonal position is ignored currently, as no
 628     // horizontal scrolling is done anyway during a selection
 629     const QScrollBar* scrollbar = verticalScrollBar();
 630     Q_ASSERT(scrollbar != 0);
 631
 632     const int maxHeight = maximumViewportSize().height();
 633     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 634     const int visibleHeight = model()->rowCount() + 1 - height;
 635     if (visibleHeight <= 0) {
 636         return QPoint(0, 0);
 637     }
 638
 639     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 640     return QPoint(0, y);
 641 }
 642
 643 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 644 {
 645     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 646
 647     switch (columnIndex) {
 648     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 649     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 650     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 651     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 652     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 653     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 654     default: break;
 655     }
 656
 657     return info;
 658 }
 659
 660 void DolphinDetailsView::resizeColumns()
 661 {
 662     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 663     // around 3 seconds for each (!) resize operation when having > 10000 items).
 664     // This gets a problem especially when opening large directories, where several
 665     // resize operations are received for showing the currently available items during
 666     // loading (the application hangs around 20 seconds when loading > 10000 items).
 667
 668     QHeaderView* headerView = header();
 669     QFontMetrics fontMetrics(viewport()->font());
 670
 671     int columnWidth[KDirModel::ColumnCount];
 672     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 673     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 674     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 675     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 676     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 677     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 678
 679     int requiredWidth = 0;
 680     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 681         if (!isColumnHidden(i)) {
 682             columnWidth[i] += 20; // provide a default gap
 683             requiredWidth += columnWidth[i];
 684             headerView->resizeSection(i, columnWidth[i]);
 685         }
 686     }
 687
 688     // resize the name column in a way that the whole available width is used
 689     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 690     if (columnWidth[KDirModel::Name] < 120) {
 691         columnWidth[KDirModel::Name] = 120;
 692     }
 693     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 694 }
 695
 696 #include "dolphindetailsview.moc"