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             setState(DragSelectingState);
 256
 257             const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 258             QRect selRect = elasticBandRect();
 259             const QRect nameColumnsRect(0, 0, nameColumnWidth, viewport()->height());
 260             selRect = nameColumnsRect.intersected(selRect);
 261
 262             setSelection(selRect, QItemSelectionModel::Select);
 263
 264         }
 265
 266         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 267         // as the Qt-issue #199631 has been fixed.
 268         // QTreeView::mouseMoveEvent(event);
 269         QAbstractItemView::mouseMoveEvent(event);
 270         updateElasticBand();
 271     } else {
 272         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 273         // as the Qt-issue #199631 has been fixed.
 274         // QTreeView::mouseMoveEvent(event);
 275         QAbstractItemView::mouseMoveEvent(event);
 276     }
 277
 278     if (m_expandingTogglePressed) {
 279         // Per default QTreeView starts either a selection or a drag operation when dragging
 280         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 281         // Turn off this behavior in Dolphin to stay predictable:
 282         clearSelection();
 283         setState(QAbstractItemView::NoState);
 284     }
 285 }
 286
 287 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 288 {
 289     const QModelIndex index = indexAt(event->pos());
 290     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 291         QTreeView::mouseReleaseEvent(event);
 292     } else {
 293         // don't change the current index if the cursor is released
 294         // above any other column than the name column, as the other
 295         // columns act as viewport
 296         const QModelIndex current = currentIndex();
 297         QTreeView::mouseReleaseEvent(event);
 298         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 299     }
 300
 301     m_expandingTogglePressed = false;
 302     if (m_showElasticBand) {
 303         setState(NoState);
 304         updateElasticBand();
 305         m_showElasticBand = false;
 306     }
 307 }
 308
 309 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 310 {
 311     DragAndDropHelper::startDrag(this, supportedActions);
 312     m_showElasticBand = false;
 313 }
 314
 315 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 316 {
 317     if (event->mimeData()->hasUrls()) {
 318         event->acceptProposedAction();
 319     }
 320
 321     if (m_showElasticBand) {
 322         updateElasticBand();
 323         m_showElasticBand = false;
 324     }
 325 }
 326
 327 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 328 {
 329     QTreeView::dragLeaveEvent(event);
 330     setDirtyRegion(m_dropRect);
 331 }
 332
 333 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 334 {
 335     QTreeView::dragMoveEvent(event);
 336
 337     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 338     setDirtyRegion(m_dropRect);
 339     const QModelIndex index = indexAt(event->pos());
 340     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 341         const KFileItem item = m_controller->itemForIndex(index);
 342         if (!item.isNull() && item.isDir()) {
 343             m_dropRect = visualRect(index);
 344         } else {
 345             m_dropRect.setSize(QSize()); // set as invalid
 346         }
 347         setDirtyRegion(m_dropRect);
 348     }
 349
 350     if (event->mimeData()->hasUrls()) {
 351         // accept url drops, independently from the destination item
 352         event->acceptProposedAction();
 353     }
 354 }
 355
 356 void DolphinDetailsView::dropEvent(QDropEvent* event)
 357 {
 358     const QModelIndex index = indexAt(event->pos());
 359     KFileItem item;
 360     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 361         item = m_controller->itemForIndex(index);
 362     }
 363     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 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 QModelIndex DolphinDetailsView::indexAt(const QPoint& point) const
 451 {
 452     // the blank portion of the name column counts as empty space
 453     const QModelIndex index = QTreeView::indexAt(point);
 454     const bool isAboveEmptySpace  = !m_useDefaultIndexAt &&
 455                                     (index.column() == KDirModel::Name) && !nameColumnRect(index).contains(point);
 456     return isAboveEmptySpace ? QModelIndex() : index;
 457 }
 458
 459 void DolphinDetailsView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command)
 460 {
 461     // We must override setSelection() as Qt calls it internally and when this happens
 462     // we must ensure that the default indexAt() is used.
 463     if (!m_showElasticBand) {
 464         m_useDefaultIndexAt = true;
 465         QTreeView::setSelection(rect, command);
 466         m_useDefaultIndexAt = false;
 467     } else {
 468         // Select the items contained within the elastic band.
 469
 470         // TODO - would this still work if the columns could be re-ordered
 471         // (which I want to implement eventually :))?
 472
 473         // Very naive implementation - clears all selected, then walks a tree,
 474         // selecting all items whose nameColumnRect(...) intersects rect.
 475
 476         // Choose a sensible startIndex - a parentless index in the
 477         // name column, as close to the top of the rect as we
 478         // can find.
 479         QRect normalisedRect = rect.normalized();
 480         QModelIndex startIndex = QTreeView::indexAt(normalisedRect.topLeft());
 481         if (startIndex.isValid()) {
 482             while (startIndex.parent().isValid()) {
 483                 startIndex = startIndex.parent();
 484             }
 485         } else {
 486             // just pick the topmost row for safety
 487             model()->index(0, KDirModel::Name);
 488         }
 489         startIndex = model()->index(startIndex.row(), KDirModel::Name);
 490         clearSelection();
 491         setSelectionRecursive(startIndex, normalisedRect, command);
 492     }
 493 }
 494
 495 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 496 {
 497     QHeaderView* headerView = header();
 498     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 499 }
 500
 501 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 502 {
 503     QHeaderView* headerView = header();
 504     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 505 }
 506
 507 void DolphinDetailsView::synchronizeSortingState(int column)
 508 {
 509     // The sorting has already been changed in QTreeView if this slot is
 510     // invoked, but Dolphin is not informed about this.
 511     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 512     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 513     m_controller->indicateSortingChange(sorting);
 514     m_controller->indicateSortOrderChange(sortOrder);
 515 }
 516
 517 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 518 {
 519     if (index.column() == DolphinModel::Name) {
 520         m_controller->emitItemEntered(index);
 521     } else {
 522         m_controller->emitViewportEntered();
 523     }
 524 }
 525
 526 void DolphinDetailsView::updateElasticBand()
 527 {
 528     if (m_showElasticBand) {
 529         QRect dirtyRegion(elasticBandRect());
 530         const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 531         m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos()) + scrollPos;
 532         dirtyRegion = dirtyRegion.united(elasticBandRect());
 533         setDirtyRegion(dirtyRegion);
 534     }
 535 }
 536
 537 QRect DolphinDetailsView::elasticBandRect() const
 538 {
 539     const QPoint pos(contentsPos());
 540     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 541
 542     const QPoint topLeft = m_elasticBandOrigin - pos - scrollPos;
 543     const QPoint bottomRight = m_elasticBandDestination - pos - scrollPos;
 544     return QRect(topLeft, bottomRight).normalized();
 545 }
 546
 547 void DolphinDetailsView::setZoomLevel(int level)
 548 {
 549     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 550     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 551
 552     const bool showPreview = m_controller->dolphinView()->showPreview();
 553     if (showPreview) {
 554         settings->setPreviewSize(size);
 555     } else {
 556         settings->setIconSize(size);
 557     }
 558
 559     updateDecorationSize(showPreview);
 560 }
 561
 562
 563 void DolphinDetailsView::slotShowPreviewChanged()
 564 {
 565     const DolphinView* view = m_controller->dolphinView();
 566     updateDecorationSize(view->showPreview());
 567 }
 568
 569 void DolphinDetailsView::configureColumns(const QPoint& pos)
 570 {
 571     KMenu popup(this);
 572     popup.addTitle(i18nc("@title:menu", "Columns"));
 573
 574     QHeaderView* headerView = header();
 575     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 576         const int logicalIndex = headerView->logicalIndex(i);
 577         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 578         QAction* action = popup.addAction(text);
 579         action->setCheckable(true);
 580         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 581         action->setData(i);
 582     }
 583
 584     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 585     if (activatedAction != 0) {
 586         const bool show = activatedAction->isChecked();
 587         const int columnIndex = activatedAction->data().toInt();
 588
 589         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 590         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 591         if (show) {
 592             Q_ASSERT(!list.contains(info));
 593             list.append(info);
 594         } else {
 595             Q_ASSERT(list.contains(info));
 596             const int index = list.indexOf(info);
 597             list.removeAt(index);
 598         }
 599
 600         m_controller->indicateAdditionalInfoChange(list);
 601         setColumnHidden(columnIndex, !show);
 602     }
 603 }
 604
 605 void DolphinDetailsView::updateColumnVisibility()
 606 {
 607     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 608     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 609         const KFileItemDelegate::Information info = infoForColumn(i);
 610         const bool hide = !list.contains(info);
 611         if (isColumnHidden(i) != hide) {
 612             setColumnHidden(i, hide);
 613         }
 614     }
 615
 616     resizeColumns();
 617 }
 618
 619 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 620 {
 621     Q_UNUSED(logicalIndex);
 622     Q_UNUSED(oldSize);
 623     Q_UNUSED(newSize);
 624     if (QApplication::mouseButtons() & Qt::LeftButton) {
 625         disableAutoResizing();
 626     }
 627 }
 628
 629 void DolphinDetailsView::slotActivationChanged(bool active)
 630 {
 631     setAlternatingRowColors(active);
 632 }
 633
 634 void DolphinDetailsView::disableAutoResizing()
 635 {
 636     m_autoResize = false;
 637 }
 638
 639 void DolphinDetailsView::requestActivation()
 640 {
 641     m_controller->requestActivation();
 642 }
 643
 644 void DolphinDetailsView::updateFont()
 645 {
 646     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 647     Q_ASSERT(settings != 0);
 648
 649     if (settings->useSystemFont()) {
 650         m_font = KGlobalSettings::generalFont();
 651     }
 652 }
 653
 654 void DolphinDetailsView::updateDecorationSize(bool showPreview)
 655 {
 656     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 657     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 658     setIconSize(QSize(iconSize, iconSize));
 659     m_decorationSize = QSize(iconSize, iconSize);
 660
 661     if (m_selectionManager != 0) {
 662         m_selectionManager->reset();
 663     }
 664
 665     doItemsLayout();
 666 }
 667
 668 QPoint DolphinDetailsView::contentsPos() const
 669 {
 670     // implementation note: the horizonal position is ignored currently, as no
 671     // horizontal scrolling is done anyway during a selection
 672     const QScrollBar* scrollbar = verticalScrollBar();
 673     Q_ASSERT(scrollbar != 0);
 674
 675     const int maxHeight = maximumViewportSize().height();
 676     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 677     const int visibleHeight = model()->rowCount() + 1 - height;
 678     if (visibleHeight <= 0) {
 679         return QPoint(0, 0);
 680     }
 681
 682     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 683     return QPoint(0, y);
 684 }
 685
 686 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 687 {
 688     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 689
 690     switch (columnIndex) {
 691     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 692     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 693     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 694     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 695     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 696     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 697     default: break;
 698     }
 699
 700     return info;
 701 }
 702
 703 void DolphinDetailsView::resizeColumns()
 704 {
 705     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 706     // around 3 seconds for each (!) resize operation when having > 10000 items).
 707     // This gets a problem especially when opening large directories, where several
 708     // resize operations are received for showing the currently available items during
 709     // loading (the application hangs around 20 seconds when loading > 10000 items).
 710
 711     QHeaderView* headerView = header();
 712     QFontMetrics fontMetrics(viewport()->font());
 713
 714     int columnWidth[KDirModel::ColumnCount];
 715     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 716     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 717     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 718     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 719     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 720     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 721
 722     int requiredWidth = 0;
 723     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 724         if (!isColumnHidden(i)) {
 725             columnWidth[i] += 20; // provide a default gap
 726             requiredWidth += columnWidth[i];
 727             headerView->resizeSection(i, columnWidth[i]);
 728         }
 729     }
 730
 731     // resize the name column in a way that the whole available width is used
 732     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 733     if (columnWidth[KDirModel::Name] < 120) {
 734         columnWidth[KDirModel::Name] = 120;
 735     }
 736     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 737 }
 738
 739 QRect DolphinDetailsView::nameColumnRect(const QModelIndex& index) const
 740 {
 741     QRect rect = visualRect(index);
 742     const KFileItem item = m_controller->itemForIndex(index);
 743     if (!item.isNull()) {
 744         const int width = DolphinFileItemDelegate::nameColumnWidth(item.name(), viewOptions());
 745         rect.setWidth(width);
 746     }
 747
 748     return rect;
 749 }
 750
 751 void DolphinDetailsView::setSelectionRecursive(const QModelIndex& startIndex,
 752                                                const QRect& rect,
 753                                                QItemSelectionModel::SelectionFlags command)
 754 {
 755     if (!startIndex.isValid()) {
 756         return;
 757     }
 758
 759     // rect is assumed to be in viewport coordinates and normalized.
 760     // Move down through the siblings of startIndex, exploring the children
 761     // of any expanded nodes.
 762     Q_ASSERT(rect.width() >= 0 && rect.height() >= 0);
 763     QModelIndex currIndex = startIndex;
 764     do {
 765         const QModelIndex belowIndex = indexBelow(currIndex);
 766         if (isExpanded(currIndex)) {
 767             // If belowIndex exists and is above the top of rect, then we need not explore
 768             // the children of currIndex as they will always be above "below".  Otherwise,
 769             // explore the children.
 770             if (!belowIndex.isValid() || visualRect(belowIndex).bottom() >= rect.top()) {
 771                 setSelectionRecursive(currIndex.child(0, currIndex.column()), rect, command);
 772             }
 773         }
 774
 775         QRect itemContentRect = nameColumnRect(currIndex);
 776         if (itemContentRect.top() > rect.bottom()) {
 777             // All remaining items will be below itemContentRect, so we may cull.
 778             return;
 779         }
 780
 781         if (itemContentRect.intersects(rect)) {
 782             selectionModel()->select(currIndex, QItemSelectionModel::Select);
 783         }
 784
 785         currIndex = belowIndex;
 786     } while (currIndex.isValid());
 787 }
 788
 789 #include "dolphindetailsview.moc"