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 "dolphinfileitemdelegate.h"
  26 #include "dolphinsettings.h"
  27 #include "dolphinsortfilterproxymodel.h"
  28 #include "draganddrophelper.h"
  29 #include "selectionmanager.h"
  30 #include "viewproperties.h"
  31 #include "zoomlevelinfo.h"
  32
  33 #include "dolphin_detailsmodesettings.h"
  34 #include "dolphin_generalsettings.h"
  35
  36 #include <kdirmodel.h>
  37 #include <klocale.h>
  38 #include <kmenu.h>
  39
  40 #include <QAbstractProxyModel>
  41 #include <QAction>
  42 #include <QApplication>
  43 #include <QHeaderView>
  44 #include <QRubberBand>
  45 #include <QPainter>
  46 #include <QScrollBar>
  47
  48 DolphinDetailsView::DolphinDetailsView(QWidget* parent, DolphinController* controller) :
  49     QTreeView(parent),
  50         m_autoResize(true),
  51     m_expandingTogglePressed(false),
  52     m_keyPressed(false),
  53     m_useDefaultIndexAt(true),
  54     m_controller(controller),
  55     m_selectionManager(0),
  56     m_font(),
  57     m_decorationSize(),
  58     m_showElasticBand(false),
  59     m_elasticBandOrigin(),
  60     m_elasticBandDestination()
  61 {
  62     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  63     Q_ASSERT(settings != 0);
  64     Q_ASSERT(controller != 0);
  65
  66     setLayoutDirection(Qt::LeftToRight);
  67     setAcceptDrops(true);
  68     setSortingEnabled(true);
  69     setUniformRowHeights(true);
  70     setSelectionBehavior(SelectItems);
  71     setDragDropMode(QAbstractItemView::DragDrop);
  72     setDropIndicatorShown(false);
  73     setAlternatingRowColors(true);
  74     setRootIsDecorated(settings->expandableFolders());
  75     setItemsExpandable(settings->expandableFolders());
  76     setEditTriggers(QAbstractItemView::NoEditTriggers);
  77
  78     setMouseTracking(true);
  79
  80     const ViewProperties props(controller->url());
  81     setSortIndicatorSection(props.sorting());
  82     setSortIndicatorOrder(props.sortOrder());
  83
  84     QHeaderView* headerView = header();
  85     connect(headerView, SIGNAL(sectionClicked(int)),
  86             this, SLOT(synchronizeSortingState(int)));
  87     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  88     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  89             this, SLOT(configureColumns(const QPoint&)));
  90     connect(headerView, SIGNAL(sectionResized(int, int, int)),
  91             this, SLOT(slotHeaderSectionResized(int, int, int)));
  92     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
  93             this, SLOT(disableAutoResizing()));
  94
  95     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  96             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  97     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  98             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  99
 100     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
 101     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
 102     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
 103     // RETURN-key in keyPressEvent().
 104     if (KGlobalSettings::singleClick()) {
 105         connect(this, SIGNAL(clicked(const QModelIndex&)),
 106                 controller, SLOT(triggerItem(const QModelIndex&)));
 107     } else {
 108         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 109                 controller, SLOT(triggerItem(const QModelIndex&)));
 110     }
 111
 112     if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
 113         m_selectionManager = new SelectionManager(this);
 114         connect(m_selectionManager, SIGNAL(selectionChanged()),
 115                 this, SLOT(requestActivation()));
 116         connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
 117                 m_selectionManager, SLOT(reset()));
 118     }
 119
 120     connect(this, SIGNAL(entered(const QModelIndex&)),
 121             this, SLOT(slotEntered(const QModelIndex&)));
 122     connect(this, SIGNAL(viewportEntered()),
 123             controller, SLOT(emitViewportEntered()));
 124     connect(controller, SIGNAL(zoomLevelChanged(int)),
 125             this, SLOT(setZoomLevel(int)));
 126     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged()),
 127             this, SLOT(updateColumnVisibility()));
 128     connect(controller, SIGNAL(activationChanged(bool)),
 129             this, SLOT(slotActivationChanged(bool)));
 130
 131     if (settings->useSystemFont()) {
 132         m_font = KGlobalSettings::generalFont();
 133     } else {
 134         m_font = QFont(settings->fontFamily(),
 135                        settings->fontSize(),
 136                        settings->fontWeight(),
 137                        settings->italicFont());
 138     }
 139
 140     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 141     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 142
 143     const DolphinView* view = controller->dolphinView();
 144     connect(view, SIGNAL(showPreviewChanged()),
 145             this, SLOT(slotShowPreviewChanged()));
 146
 147     updateDecorationSize(view->showPreview());
 148
 149     setFocus();
 150     viewport()->installEventFilter(this);
 151
 152     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 153             this, SLOT(updateFont()));
 154
 155     m_useDefaultIndexAt = false;
 156 }
 157
 158 DolphinDetailsView::~DolphinDetailsView()
 159 {
 160 }
 161
 162 bool DolphinDetailsView::event(QEvent* event)
 163 {
 164     if (event->type() == QEvent::Polish) {
 165         QHeaderView* headerView = header();
 166         headerView->setResizeMode(QHeaderView::Interactive);
 167         headerView->setMovable(false);
 168
 169         updateColumnVisibility();
 170
 171         hideColumn(DolphinModel::Rating);
 172         hideColumn(DolphinModel::Tags);
 173     } else if (event->type() == QEvent::UpdateRequest) {
 174         // a wheel movement will scroll 4 items
 175         if (model()->rowCount() > 0) {
 176             verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
 177         }
 178     }
 179
 180     return QTreeView::event(event);
 181 }
 182
 183 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 184 {
 185     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 186     viewOptions.font = m_font;
 187     viewOptions.showDecorationSelected = true;
 188     viewOptions.decorationSize = m_decorationSize;
 189     return viewOptions;
 190 }
 191
 192 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 193 {
 194     QTreeView::contextMenuEvent(event);
 195     m_controller->triggerContextMenuRequest(event->pos());
 196 }
 197
 198 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 199 {
 200     m_controller->requestActivation();
 201
 202     const QModelIndex current = currentIndex();
 203     QTreeView::mousePressEvent(event);
 204
 205     m_expandingTogglePressed = false;
 206     const QModelIndex index = indexAt(event->pos());
 207     const bool updateState = index.isValid() &&
 208                              (index.column() == DolphinModel::Name) &&
 209                              (event->button() == Qt::LeftButton);
 210     if (updateState) {
 211         // TODO: See comment in DolphinIconsView::mousePressEvent(). Only update
 212         // the state if no expanding/collapsing area has been hit:
 213         const QRect rect = visualRect(index);
 214         if (event->pos().x() >= rect.x() + indentation()) {
 215             setState(QAbstractItemView::DraggingState);
 216         } else {
 217             m_expandingTogglePressed = true;
 218         }
 219     }
 220
 221     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 222         // the mouse press is done somewhere outside the filename column
 223         if (QApplication::mouseButtons() & Qt::MidButton) {
 224             m_controller->replaceUrlByClipboard();
 225         }
 226
 227         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 228         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 229             clearSelection();
 230         }
 231
 232         // restore the current index, other columns are handled as viewport area
 233         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 234     }
 235
 236     if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 237         m_showElasticBand = true;
 238         const QPoint pos = contentsPos();
 239         const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 240         m_elasticBandOrigin = event->pos() + pos + scrollPos;
 241         m_elasticBandDestination = m_elasticBandOrigin;
 242     }
 243 }
 244
 245 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 246 {
 247     if (m_showElasticBand) {
 248         const QPoint mousePos = event->pos();
 249         const QModelIndex index = indexAt(mousePos);
 250         if (!index.isValid()) {
 251             // the destination of the selection rectangle is above the viewport. In this
 252             // case QTreeView does no selection at all, which is not the wanted behavior
 253             // in Dolphin -> select all items within the elastic band rectangle
 254             clearSelection();
 255
 256             const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 257             QRect selRect = elasticBandRect();
 258             const QRect nameColumnsRect(0, 0, nameColumnWidth, viewport()->height());
 259             selRect = nameColumnsRect.intersected(selRect);
 260
 261             setSelection(selRect, QItemSelectionModel::Select);
 262
 263         }
 264
 265         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 266         // as the Qt-issue #199631 has been fixed.
 267         // QTreeView::mouseMoveEvent(event);
 268         QAbstractItemView::mouseMoveEvent(event);
 269         updateElasticBand();
 270     } else {
 271         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 272         // as the Qt-issue #199631 has been fixed.
 273         // QTreeView::mouseMoveEvent(event);
 274         QAbstractItemView::mouseMoveEvent(event);
 275     }
 276
 277     if (m_expandingTogglePressed) {
 278         // Per default QTreeView starts either a selection or a drag operation when dragging
 279         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 280         // Turn off this behavior in Dolphin to stay predictable:
 281         clearSelection();
 282         setState(QAbstractItemView::NoState);
 283     }
 284 }
 285
 286 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 287 {
 288     const QModelIndex index = indexAt(event->pos());
 289     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 290         QTreeView::mouseReleaseEvent(event);
 291     } else {
 292         // don't change the current index if the cursor is released
 293         // above any other column than the name column, as the other
 294         // columns act as viewport
 295         const QModelIndex current = currentIndex();
 296         QTreeView::mouseReleaseEvent(event);
 297         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 298     }
 299
 300     m_expandingTogglePressed = false;
 301     if (m_showElasticBand) {
 302         updateElasticBand();
 303         m_showElasticBand = false;
 304     }
 305 }
 306
 307 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 308 {
 309     DragAndDropHelper::startDrag(this, supportedActions, m_controller);
 310     m_showElasticBand = false;
 311 }
 312
 313 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 314 {
 315     if (event->mimeData()->hasUrls()) {
 316         event->acceptProposedAction();
 317     }
 318
 319     if (m_showElasticBand) {
 320         updateElasticBand();
 321         m_showElasticBand = false;
 322     }
 323 }
 324
 325 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 326 {
 327     QTreeView::dragLeaveEvent(event);
 328     setDirtyRegion(m_dropRect);
 329 }
 330
 331 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 332 {
 333     QTreeView::dragMoveEvent(event);
 334
 335     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 336     setDirtyRegion(m_dropRect);
 337     const QModelIndex index = indexAt(event->pos());
 338     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 339         const KFileItem item = m_controller->itemForIndex(index);
 340         if (!item.isNull() && item.isDir()) {
 341             m_dropRect = visualRect(index);
 342         } else {
 343             m_dropRect.setSize(QSize()); // set as invalid
 344         }
 345         setDirtyRegion(m_dropRect);
 346     }
 347
 348     if (event->mimeData()->hasUrls()) {
 349         // accept url drops, independently from the destination item
 350         event->acceptProposedAction();
 351     }
 352 }
 353
 354 void DolphinDetailsView::dropEvent(QDropEvent* event)
 355 {
 356     const QModelIndex index = indexAt(event->pos());
 357     KFileItem item;
 358     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 359         item = m_controller->itemForIndex(index);
 360     }
 361     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 362     QTreeView::dropEvent(event);
 363 }
 364
 365 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 366 {
 367     QTreeView::paintEvent(event);
 368     if (m_showElasticBand) {
 369         // The following code has been taken from QListView
 370         // and adapted to DolphinDetailsView.
 371         // (C) 1992-2007 Trolltech ASA
 372         QStyleOptionRubberBand opt;
 373         opt.initFrom(this);
 374         opt.shape = QRubberBand::Rectangle;
 375         opt.opaque = false;
 376         opt.rect = elasticBandRect();
 377
 378         QPainter painter(viewport());
 379         painter.save();
 380         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 381         painter.restore();
 382     }
 383 }
 384
 385 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 386 {
 387     // If the Control modifier is pressed, a multiple selection
 388     // is done and DolphinDetailsView::currentChanged() may not
 389     // not change the selection in a custom way.
 390     m_keyPressed = !(event->modifiers() & Qt::ControlModifier);
 391
 392     QTreeView::keyPressEvent(event);
 393     m_controller->handleKeyPressEvent(event);
 394 }
 395
 396 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 397 {
 398     QTreeView::keyReleaseEvent(event);
 399     m_keyPressed = false;
 400 }
 401
 402 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 403 {
 404     if (m_autoResize) {
 405         resizeColumns();
 406     }
 407     QTreeView::resizeEvent(event);
 408 }
 409
 410 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 411 {
 412     if (m_selectionManager != 0) {
 413         m_selectionManager->reset();
 414     }
 415
 416     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 417     if (event->modifiers() & Qt::ControlModifier) {
 418         event->ignore();
 419         return;
 420     }
 421
 422     QTreeView::wheelEvent(event);
 423 }
 424
 425 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 426 {
 427     QTreeView::currentChanged(current, previous);
 428
 429     // Stay consistent with QListView: When changing the current index by key presses,
 430     // also change the selection.
 431     if (m_keyPressed) {
 432         selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 433     }
 434 }
 435
 436 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 437 {
 438     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 439         // if the mouse is above an item and moved very fast outside the widget,
 440         // no viewportEntered() signal might be emitted although the mouse has been moved
 441         // above the viewport
 442         m_controller->emitViewportEntered();
 443     }
 444
 445     return QTreeView::eventFilter(watched, event);
 446 }
 447
 448 QModelIndex DolphinDetailsView::indexAt(const QPoint& point) const
 449 {
 450     // the blank portion of the name column counts as empty space
 451     const QModelIndex index = QTreeView::indexAt(point);
 452     const bool isAboveEmptySpace  = !m_useDefaultIndexAt &&
 453                                     (index.column() == KDirModel::Name) && !nameColumnRect(index).contains(point);
 454     return isAboveEmptySpace ? QModelIndex() : index;
 455 }
 456
 457 void DolphinDetailsView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command)
 458 {
 459     // We must override setSelection() as Qt calls it internally and when this happens
 460     // we must ensure that the default indexAt() is used.
 461     if (!m_showElasticBand) {
 462         m_useDefaultIndexAt = true;
 463         QTreeView::setSelection(rect, command);
 464         m_useDefaultIndexAt = false;
 465     } else {
 466         // Select the items contained within the elastic band.
 467
 468         // TODO - would this still work if the columns could be re-ordered
 469         // (which I want to implement eventually :))?
 470
 471         // Very naive implementation - clears all selected, then walks a tree,
 472         // selecting all items whose nameColumnRect(...) intersects rect.
 473
 474         // Choose a sensible startIndex - a parentless index in the
 475         // name column, as close to the top of the rect as we
 476         // can find.
 477         QRect normalisedRect = rect.normalized();
 478         QModelIndex startIndex = QTreeView::indexAt(normalisedRect.topLeft());
 479         if (startIndex.isValid()) {
 480             while (startIndex.parent().isValid()) {
 481                 startIndex = startIndex.parent();
 482             }
 483         } else {
 484             // just pick the topmost row for safety
 485             model()->index(0, KDirModel::Name);
 486         }
 487         startIndex = model()->index(startIndex.row(), KDirModel::Name);
 488         clearSelection();
 489         setSelectionRecursive(startIndex, normalisedRect, command);
 490     }
 491 }
 492
 493 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 494 {
 495     QHeaderView* headerView = header();
 496     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 497 }
 498
 499 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 500 {
 501     QHeaderView* headerView = header();
 502     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 503 }
 504
 505 void DolphinDetailsView::synchronizeSortingState(int column)
 506 {
 507     // The sorting has already been changed in QTreeView if this slot is
 508     // invoked, but Dolphin is not informed about this.
 509     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 510     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 511     m_controller->indicateSortingChange(sorting);
 512     m_controller->indicateSortOrderChange(sortOrder);
 513 }
 514
 515 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 516 {
 517     if (index.column() == DolphinModel::Name) {
 518         m_controller->emitItemEntered(index);
 519     } else {
 520         m_controller->emitViewportEntered();
 521     }
 522 }
 523
 524 void DolphinDetailsView::updateElasticBand()
 525 {
 526     if (m_showElasticBand) {
 527         QRect dirtyRegion(elasticBandRect());
 528         const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 529         m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos()) + scrollPos;
 530         dirtyRegion = dirtyRegion.united(elasticBandRect());
 531         setDirtyRegion(dirtyRegion);
 532     }
 533 }
 534
 535 QRect DolphinDetailsView::elasticBandRect() const
 536 {
 537     const QPoint pos(contentsPos());
 538     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 539
 540     const QPoint topLeft = m_elasticBandOrigin - pos - scrollPos;
 541     const QPoint bottomRight = m_elasticBandDestination - pos - scrollPos;
 542     return QRect(topLeft, bottomRight).normalized();
 543 }
 544
 545 void DolphinDetailsView::setZoomLevel(int level)
 546 {
 547     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 548     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 549
 550     const bool showPreview = m_controller->dolphinView()->showPreview();
 551     if (showPreview) {
 552         settings->setPreviewSize(size);
 553     } else {
 554         settings->setIconSize(size);
 555     }
 556
 557     updateDecorationSize(showPreview);
 558 }
 559
 560
 561 void DolphinDetailsView::slotShowPreviewChanged()
 562 {
 563     const DolphinView* view = m_controller->dolphinView();
 564     updateDecorationSize(view->showPreview());
 565 }
 566
 567 void DolphinDetailsView::configureColumns(const QPoint& pos)
 568 {
 569     KMenu popup(this);
 570     popup.addTitle(i18nc("@title:menu", "Columns"));
 571
 572     QHeaderView* headerView = header();
 573     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 574         const int logicalIndex = headerView->logicalIndex(i);
 575         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 576         QAction* action = popup.addAction(text);
 577         action->setCheckable(true);
 578         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 579         action->setData(i);
 580     }
 581
 582     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 583     if (activatedAction != 0) {
 584         const bool show = activatedAction->isChecked();
 585         const int columnIndex = activatedAction->data().toInt();
 586
 587         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 588         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 589         if (show) {
 590             Q_ASSERT(!list.contains(info));
 591             list.append(info);
 592         } else {
 593             Q_ASSERT(list.contains(info));
 594             const int index = list.indexOf(info);
 595             list.removeAt(index);
 596         }
 597
 598         m_controller->indicateAdditionalInfoChange(list);
 599         setColumnHidden(columnIndex, !show);
 600     }
 601 }
 602
 603 void DolphinDetailsView::updateColumnVisibility()
 604 {
 605     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 606     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 607         const KFileItemDelegate::Information info = infoForColumn(i);
 608         const bool hide = !list.contains(info);
 609         if (isColumnHidden(i) != hide) {
 610             setColumnHidden(i, hide);
 611         }
 612     }
 613
 614     resizeColumns();
 615 }
 616
 617 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 618 {
 619     Q_UNUSED(logicalIndex);
 620     Q_UNUSED(oldSize);
 621     Q_UNUSED(newSize);
 622     if (QApplication::mouseButtons() & Qt::LeftButton) {
 623         disableAutoResizing();
 624     }
 625 }
 626
 627 void DolphinDetailsView::slotActivationChanged(bool active)
 628 {
 629     setAlternatingRowColors(active);
 630 }
 631
 632 void DolphinDetailsView::disableAutoResizing()
 633 {
 634     m_autoResize = false;
 635 }
 636
 637 void DolphinDetailsView::requestActivation()
 638 {
 639     m_controller->requestActivation();
 640 }
 641
 642 void DolphinDetailsView::updateFont()
 643 {
 644     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 645     Q_ASSERT(settings != 0);
 646
 647     if (settings->useSystemFont()) {
 648         m_font = KGlobalSettings::generalFont();
 649     }
 650 }
 651
 652 void DolphinDetailsView::updateDecorationSize(bool showPreview)
 653 {
 654     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 655     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 656     setIconSize(QSize(iconSize, iconSize));
 657     m_decorationSize = QSize(iconSize, iconSize);
 658
 659     if (m_selectionManager != 0) {
 660         m_selectionManager->reset();
 661     }
 662
 663     doItemsLayout();
 664 }
 665
 666 QPoint DolphinDetailsView::contentsPos() const
 667 {
 668     // implementation note: the horizonal position is ignored currently, as no
 669     // horizontal scrolling is done anyway during a selection
 670     const QScrollBar* scrollbar = verticalScrollBar();
 671     Q_ASSERT(scrollbar != 0);
 672
 673     const int maxHeight = maximumViewportSize().height();
 674     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 675     const int visibleHeight = model()->rowCount() + 1 - height;
 676     if (visibleHeight <= 0) {
 677         return QPoint(0, 0);
 678     }
 679
 680     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 681     return QPoint(0, y);
 682 }
 683
 684 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 685 {
 686     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 687
 688     switch (columnIndex) {
 689     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 690     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 691     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 692     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 693     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 694     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 695     default: break;
 696     }
 697
 698     return info;
 699 }
 700
 701 void DolphinDetailsView::resizeColumns()
 702 {
 703     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 704     // around 3 seconds for each (!) resize operation when having > 10000 items).
 705     // This gets a problem especially when opening large directories, where several
 706     // resize operations are received for showing the currently available items during
 707     // loading (the application hangs around 20 seconds when loading > 10000 items).
 708
 709     QHeaderView* headerView = header();
 710     QFontMetrics fontMetrics(viewport()->font());
 711
 712     int columnWidth[KDirModel::ColumnCount];
 713     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 714     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 715     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 716     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 717     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 718     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 719
 720     int requiredWidth = 0;
 721     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 722         if (!isColumnHidden(i)) {
 723             columnWidth[i] += 20; // provide a default gap
 724             requiredWidth += columnWidth[i];
 725             headerView->resizeSection(i, columnWidth[i]);
 726         }
 727     }
 728
 729     // resize the name column in a way that the whole available width is used
 730     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 731     if (columnWidth[KDirModel::Name] < 120) {
 732         columnWidth[KDirModel::Name] = 120;
 733     }
 734     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 735 }
 736
 737 QRect DolphinDetailsView::nameColumnRect(const QModelIndex& index) const
 738 {
 739     QRect rect = visualRect(index);
 740     const KFileItem item = m_controller->itemForIndex(index);
 741     if (!item.isNull()) {
 742         const int width = DolphinFileItemDelegate::nameColumnWidth(item.name(), viewOptions());
 743         rect.setWidth(width);
 744     }
 745
 746     return rect;
 747 }
 748
 749 void DolphinDetailsView::setSelectionRecursive(const QModelIndex& startIndex,
 750                                                const QRect& rect,
 751                                                QItemSelectionModel::SelectionFlags command)
 752 {
 753     if (!startIndex.isValid()) {
 754         return;
 755     }
 756
 757     // rect is assumed to be in viewport coordinates and normalized.
 758     // Move down through the siblings of startIndex, exploring the children
 759     // of any expanded nodes.
 760     Q_ASSERT(rect.width() >= 0 && rect.height() >= 0);
 761     QModelIndex currIndex = startIndex;
 762     do {
 763         const QModelIndex belowIndex = indexBelow(currIndex);
 764         if (isExpanded(currIndex)) {
 765             // If belowIndex exists and is above the top of rect, then we need not explore
 766             // the children of currIndex as they will always be above "below".  Otherwise,
 767             // explore the children.
 768             if (!belowIndex.isValid() || visualRect(belowIndex).bottom() >= rect.top()) {
 769                 setSelectionRecursive(currIndex.child(0, currIndex.column()), rect, command);
 770             }
 771         }
 772
 773         QRect itemContentRect = nameColumnRect(currIndex);
 774         if (itemContentRect.top() > rect.bottom()) {
 775             // All remaining items will be below itemContentRect, so we may cull.
 776             return;
 777         }
 778
 779         if (itemContentRect.intersects(rect)) {
 780             selectionModel()->select(currIndex, QItemSelectionModel::Select);
 781         }
 782
 783         currIndex = belowIndex;
 784     } while (currIndex.isValid());
 785 }
 786
 787 #include "dolphindetailsview.moc"