src/dolphindetailsview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz (peter.penz@gmx.at)                  *
   3  *   Copyright (C) 2008 by Simon St. James (kdedevel@etotheipiplusone.com) *
   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 "settings/dolphinsettings.h"
  27 #include "dolphinsortfilterproxymodel.h"
  28 #include "dolphinviewautoscroller.h"
  29 #include "draganddrophelper.h"
  30 #include "viewextensionsfactory.h"
  31 #include "viewproperties.h"
  32 #include "zoomlevelinfo.h"
  33
  34 #include "dolphin_detailsmodesettings.h"
  35 #include "dolphin_generalsettings.h"
  36
  37 #include <kdirmodel.h>
  38 #include <klocale.h>
  39 #include <kmenu.h>
  40
  41 #include <QAction>
  42 #include <QApplication>
  43 #include <QHeaderView>
  44 #include <QRubberBand>
  45 #include <QPainter>
  46 #include <QScrollBar>
  47
  48 DolphinDetailsView::DolphinDetailsView(QWidget* parent,
  49                                        DolphinController* controller,
  50                                        DolphinSortFilterProxyModel* proxyModel) :
  51     QTreeView(parent),
  52     m_autoResize(true),
  53     m_expandingTogglePressed(false),
  54     m_keyPressed(false),
  55     m_useDefaultIndexAt(true),
  56     m_ignoreScrollTo(false),
  57     m_controller(controller),
  58     m_extensionsFactory(0),
  59     m_expandableFoldersAction(0),
  60     m_font(),
  61     m_decorationSize(),
  62     m_band()
  63 {
  64     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  65     Q_ASSERT(settings != 0);
  66     Q_ASSERT(controller != 0);
  67
  68     setLayoutDirection(Qt::LeftToRight);
  69     setAcceptDrops(true);
  70     setSortingEnabled(true);
  71     setUniformRowHeights(true);
  72     setSelectionBehavior(SelectItems);
  73     setDragDropMode(QAbstractItemView::DragDrop);
  74     setDropIndicatorShown(false);
  75     setAlternatingRowColors(true);
  76     setRootIsDecorated(settings->expandableFolders());
  77     setItemsExpandable(settings->expandableFolders());
  78     setEditTriggers(QAbstractItemView::NoEditTriggers);
  79     setModel(proxyModel);
  80
  81     setMouseTracking(true);
  82
  83     const ViewProperties props(controller->url());
  84     setSortIndicatorSection(props.sorting());
  85     setSortIndicatorOrder(props.sortOrder());
  86
  87     QHeaderView* headerView = header();
  88     connect(headerView, SIGNAL(sectionClicked(int)),
  89             this, SLOT(synchronizeSortingState(int)));
  90     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  91     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  92             this, SLOT(configureSettings(const QPoint&)));
  93     connect(headerView, SIGNAL(sectionResized(int, int, int)),
  94             this, SLOT(slotHeaderSectionResized(int, int, int)));
  95     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
  96             this, SLOT(disableAutoResizing()));
  97
  98     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  99             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
 100     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
 101             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
 102
 103     connect(this, SIGNAL(clicked(const QModelIndex&)),
 104             controller, SLOT(requestTab(const QModelIndex&)));
 105     if (KGlobalSettings::singleClick()) {
 106         connect(this, SIGNAL(clicked(const QModelIndex&)),
 107                 controller, SLOT(triggerItem(const QModelIndex&)));
 108     } else {
 109         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 110                 controller, SLOT(triggerItem(const QModelIndex&)));
 111     }
 112
 113     connect(this, SIGNAL(entered(const QModelIndex&)),
 114             this, SLOT(slotEntered(const QModelIndex&)));
 115     connect(this, SIGNAL(viewportEntered()),
 116             controller, SLOT(emitViewportEntered()));
 117     connect(controller, SIGNAL(nameFilterChanged(const QString&)),
 118             this, SLOT(setNameFilter(const QString&)));
 119     connect(controller, SIGNAL(zoomLevelChanged(int)),
 120             this, SLOT(setZoomLevel(int)));
 121     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged()),
 122             this, SLOT(updateColumnVisibility()));
 123     connect(controller, SIGNAL(activationChanged(bool)),
 124             this, SLOT(slotActivationChanged(bool)));
 125
 126     if (settings->useSystemFont()) {
 127         m_font = KGlobalSettings::generalFont();
 128     } else {
 129         m_font = QFont(settings->fontFamily(),
 130                        settings->fontSize(),
 131                        settings->fontWeight(),
 132                        settings->italicFont());
 133     }
 134
 135     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 136     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 137
 138     const DolphinView* view = controller->dolphinView();
 139     connect(view, SIGNAL(showPreviewChanged()),
 140             this, SLOT(slotShowPreviewChanged()));
 141
 142     updateDecorationSize(view->showPreview());
 143
 144     setFocus();
 145     viewport()->installEventFilter(this);
 146
 147     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 148             this, SLOT(slotGlobalSettingsChanged(int)));
 149
 150     m_useDefaultIndexAt = false;
 151
 152     m_expandableFoldersAction = new QAction(i18nc("@option:check", "Expandable Folders"), this);
 153     m_expandableFoldersAction->setCheckable(true);
 154     connect(m_expandableFoldersAction, SIGNAL(toggled(bool)),
 155             this, SLOT(setFoldersExpandable(bool)));
 156
 157     m_extensionsFactory = new ViewExtensionsFactory(this, controller);
 158     m_extensionsFactory->fileItemDelegate()->setMinimizedNameColumn(true);
 159 }
 160
 161 DolphinDetailsView::~DolphinDetailsView()
 162 {
 163 }
 164
 165 bool DolphinDetailsView::event(QEvent* event)
 166 {
 167     if (event->type() == QEvent::Polish) {
 168         header()->setResizeMode(QHeaderView::Interactive);
 169         updateColumnVisibility();
 170     }
 171
 172     return QTreeView::event(event);
 173 }
 174
 175 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 176 {
 177     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 178     viewOptions.font = m_font;
 179     viewOptions.showDecorationSelected = true;
 180     viewOptions.decorationSize = m_decorationSize;
 181     return viewOptions;
 182 }
 183
 184 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 185 {
 186     QTreeView::contextMenuEvent(event);
 187
 188     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 189     m_expandableFoldersAction->setChecked(settings->expandableFolders());
 190     m_controller->triggerContextMenuRequest(event->pos(),
 191                                             QList<QAction*>() << m_expandableFoldersAction);
 192 }
 193
 194 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 195 {
 196     m_controller->requestActivation();
 197
 198     const QModelIndex current = currentIndex();
 199     QTreeView::mousePressEvent(event);
 200
 201     m_expandingTogglePressed = isAboveExpandingToggle(event->pos());
 202
 203     const QModelIndex index = indexAt(event->pos());
 204     const bool updateState = index.isValid() &&
 205                              (index.column() == DolphinModel::Name) &&
 206                              (event->button() == Qt::LeftButton);
 207     if (updateState) {
 208         setState(QAbstractItemView::DraggingState);
 209     }
 210
 211     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 212         // the mouse press is done somewhere outside the filename column
 213         if (QApplication::mouseButtons() & Qt::MidButton) {
 214             m_controller->replaceUrlByClipboard();
 215         }
 216
 217         const Qt::KeyboardModifiers mod = QApplication::keyboardModifiers();
 218         if (!m_expandingTogglePressed && !(mod & Qt::ShiftModifier) && !(mod & Qt::ControlModifier)) {
 219             clearSelection();
 220         }
 221
 222         // restore the current index, other columns are handled as viewport area.
 223         // setCurrentIndex(...) implicitly calls scrollTo(...), which we want to ignore.
 224         m_ignoreScrollTo = true;
 225         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 226         m_ignoreScrollTo = false;
 227
 228         if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 229             // Inform Qt about what we are doing - otherwise it starts dragging items around!
 230             setState(DragSelectingState);
 231             m_band.show = true;
 232             // Incremental update data will not be useful - start from scratch.
 233             m_band.ignoreOldInfo = true;
 234             const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 235             m_band.origin = event->pos()  + scrollPos;
 236             m_band.destination = m_band.origin;
 237             m_band.originalSelection = selectionModel()->selection();
 238         }
 239     }
 240 }
 241
 242 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 243 {
 244     if (m_expandingTogglePressed) {
 245         // Per default QTreeView starts either a selection or a drag operation when dragging
 246         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 247         // Turn off this behavior in Dolphin to stay predictable:
 248         setState(QAbstractItemView::NoState);
 249         return;
 250     }
 251
 252     if (m_band.show) {
 253         const QPoint mousePos = event->pos();
 254         const QModelIndex index = indexAt(mousePos);
 255         if (!index.isValid()) {
 256             // the destination of the selection rectangle is above the viewport. In this
 257             // case QTreeView does no selection at all, which is not the wanted behavior
 258             // in Dolphin -> select all items within the elastic band rectangle
 259             updateElasticBandSelection();
 260         }
 261
 262         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 263         // as the Qt-issue #199631 has been fixed.
 264         // QTreeView::mouseMoveEvent(event);
 265         QAbstractItemView::mouseMoveEvent(event);
 266         updateElasticBand();
 267     } else {
 268         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 269         // as the Qt-issue #199631 has been fixed.
 270         // QTreeView::mouseMoveEvent(event);
 271         QAbstractItemView::mouseMoveEvent(event);
 272     }
 273 }
 274
 275 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 276 {
 277     if (!m_expandingTogglePressed) {
 278         const QModelIndex index = indexAt(event->pos());
 279         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 280             QTreeView::mouseReleaseEvent(event);
 281         } else {
 282             // don't change the current index if the cursor is released
 283             // above any other column than the name column, as the other
 284             // columns act as viewport
 285             const QModelIndex current = currentIndex();
 286             QTreeView::mouseReleaseEvent(event);
 287             selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 288         }
 289     }
 290     m_expandingTogglePressed = false;
 291
 292     if (m_band.show) {
 293         setState(NoState);
 294         updateElasticBand();
 295         m_band.show = false;
 296     }
 297 }
 298
 299 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 300 {
 301     DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 302     m_band.show = false;
 303 }
 304
 305 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 306 {
 307     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 308         event->acceptProposedAction();
 309     }
 310
 311     if (m_band.show) {
 312         updateElasticBand();
 313         m_band.show = false;
 314     }
 315 }
 316
 317 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 318 {
 319     QTreeView::dragLeaveEvent(event);
 320     setDirtyRegion(m_dropRect);
 321 }
 322
 323 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 324 {
 325     QTreeView::dragMoveEvent(event);
 326
 327     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 328     setDirtyRegion(m_dropRect);
 329     const QModelIndex index = indexAt(event->pos());
 330     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 331         const KFileItem item = m_controller->itemForIndex(index);
 332         if (!item.isNull() && item.isDir()) {
 333             m_dropRect = visualRect(index);
 334         } else {
 335             m_dropRect.setSize(QSize()); // set as invalid
 336         }
 337         setDirtyRegion(m_dropRect);
 338     }
 339
 340     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 341         // accept url drops, independently from the destination item
 342         event->acceptProposedAction();
 343     }
 344 }
 345
 346 void DolphinDetailsView::dropEvent(QDropEvent* event)
 347 {
 348     const QModelIndex index = indexAt(event->pos());
 349     KFileItem item;
 350     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 351         item = m_controller->itemForIndex(index);
 352     }
 353     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 354     QTreeView::dropEvent(event);
 355 }
 356
 357 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 358 {
 359     QTreeView::paintEvent(event);
 360     if (m_band.show) {
 361         // The following code has been taken from QListView
 362         // and adapted to DolphinDetailsView.
 363         // (C) 1992-2007 Trolltech ASA
 364         QStyleOptionRubberBand opt;
 365         opt.initFrom(this);
 366         opt.shape = QRubberBand::Rectangle;
 367         opt.opaque = false;
 368         opt.rect = elasticBandRect();
 369
 370         QPainter painter(viewport());
 371         painter.save();
 372         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 373         painter.restore();
 374     }
 375 }
 376
 377 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 378 {
 379     // If the Control modifier is pressed, a multiple selection
 380     // is done and DolphinDetailsView::currentChanged() may not
 381     // not change the selection in a custom way.
 382     m_keyPressed = !(event->modifiers() & Qt::ControlModifier);
 383
 384     QTreeView::keyPressEvent(event);
 385     m_controller->handleKeyPressEvent(event);
 386 }
 387
 388 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 389 {
 390     QTreeView::keyReleaseEvent(event);
 391     m_keyPressed = false;
 392 }
 393
 394 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 395 {
 396     QTreeView::resizeEvent(event);
 397     if (m_autoResize) {
 398         resizeColumns();
 399     }
 400 }
 401
 402 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 403 {
 404     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 405     if (event->modifiers() & Qt::ControlModifier) {
 406         event->ignore();
 407         return;
 408     }
 409
 410     const int height = m_decorationSize.height();
 411     const int step = (height >= KIconLoader::SizeHuge) ? height / 10 : (KIconLoader::SizeHuge - height) / 2;
 412     verticalScrollBar()->setSingleStep(step);
 413     QTreeView::wheelEvent(event);
 414 }
 415
 416 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 417 {
 418     QTreeView::currentChanged(current, previous);
 419     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 420
 421     // Stay consistent with QListView: When changing the current index by key presses,
 422     // also change the selection.
 423     if (m_keyPressed) {
 424         selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 425     }
 426 }
 427
 428 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 429 {
 430     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 431         // if the mouse is above an item and moved very fast outside the widget,
 432         // no viewportEntered() signal might be emitted although the mouse has been moved
 433         // above the viewport
 434         m_controller->emitViewportEntered();
 435     }
 436
 437     return QTreeView::eventFilter(watched, event);
 438 }
 439
 440 QModelIndex DolphinDetailsView::indexAt(const QPoint& point) const
 441 {
 442     // the blank portion of the name column counts as empty space
 443     const QModelIndex index = QTreeView::indexAt(point);
 444     const bool isAboveEmptySpace  = !m_useDefaultIndexAt &&
 445                                     (index.column() == KDirModel::Name) && !nameColumnRect(index).contains(point);
 446     return isAboveEmptySpace ? QModelIndex() : index;
 447 }
 448
 449 void DolphinDetailsView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags command)
 450 {
 451     // We must override setSelection() as Qt calls it internally and when this happens
 452     // we must ensure that the default indexAt() is used.
 453     if (!m_band.show) {
 454         m_useDefaultIndexAt = true;
 455         QTreeView::setSelection(rect, command);
 456         m_useDefaultIndexAt = false;
 457     } else {
 458         // Use our own elastic band selection algorithm
 459         updateElasticBandSelection();
 460     }
 461 }
 462
 463 void DolphinDetailsView::scrollTo(const QModelIndex & index, ScrollHint hint)
 464 {
 465     if (!m_ignoreScrollTo) {
 466         QTreeView::scrollTo(index, hint);
 467     }
 468 }
 469
 470 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 471 {
 472     header()->setSortIndicator(sorting, header()->sortIndicatorOrder());
 473 }
 474
 475 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 476 {
 477     header()->setSortIndicator(header()->sortIndicatorSection(), sortOrder);
 478 }
 479
 480 void DolphinDetailsView::synchronizeSortingState(int column)
 481 {
 482     // The sorting has already been changed in QTreeView if this slot is
 483     // invoked, but Dolphin is not informed about this.
 484     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 485     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 486     m_controller->indicateSortingChange(sorting);
 487     m_controller->indicateSortOrderChange(sortOrder);
 488 }
 489
 490 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 491 {
 492     if (index.column() == DolphinModel::Name) {
 493         m_controller->emitItemEntered(index);
 494     } else {
 495         m_controller->emitViewportEntered();
 496     }
 497 }
 498
 499 void DolphinDetailsView::updateElasticBand()
 500 {
 501     if (m_band.show) {
 502         QRect dirtyRegion(elasticBandRect());
 503         const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 504         m_band.destination = viewport()->mapFromGlobal(QCursor::pos()) + scrollPos;
 505         // Going above the (logical) top-left of the view causes complications during selection;
 506         // we may as well prevent it.
 507         if (m_band.destination.y() < 0) {
 508             m_band.destination.setY(0);
 509         }
 510         if (m_band.destination.x() < 0) {
 511             m_band.destination.setX(0);
 512         }
 513         dirtyRegion = dirtyRegion.united(elasticBandRect());
 514         setDirtyRegion(dirtyRegion);
 515     }
 516 }
 517
 518 QRect DolphinDetailsView::elasticBandRect() const
 519 {
 520     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 521
 522     const QPoint topLeft = m_band.origin - scrollPos;
 523     const QPoint bottomRight = m_band.destination - scrollPos;
 524     return QRect(topLeft, bottomRight).normalized();
 525 }
 526
 527 void DolphinDetailsView::setNameFilter(const QString& nameFilter)
 528 {
 529     DolphinSortFilterProxyModel* proxyModel = static_cast<DolphinSortFilterProxyModel*>(model());
 530     proxyModel->setFilterRegExp(nameFilter);
 531 }
 532
 533 void DolphinDetailsView::setZoomLevel(int level)
 534 {
 535     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 536     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 537
 538     const bool showPreview = m_controller->dolphinView()->showPreview();
 539     if (showPreview) {
 540         settings->setPreviewSize(size);
 541     } else {
 542         settings->setIconSize(size);
 543     }
 544
 545     updateDecorationSize(showPreview);
 546 }
 547
 548 void DolphinDetailsView::slotShowPreviewChanged()
 549 {
 550     const DolphinView* view = m_controller->dolphinView();
 551     updateDecorationSize(view->showPreview());
 552 }
 553
 554 void DolphinDetailsView::configureSettings(const QPoint& pos)
 555 {
 556     KMenu popup(this);
 557     popup.addTitle(i18nc("@title:menu", "Columns"));
 558
 559     // add checkbox items for each column
 560     QHeaderView* headerView = header();
 561     const int columns = model()->columnCount();
 562     for (int i = 0; i < columns; ++i) {
 563         const int logicalIndex = headerView->logicalIndex(i);
 564         const QString text = model()->headerData(logicalIndex, Qt::Horizontal).toString();
 565         QAction* action = popup.addAction(text);
 566         action->setCheckable(true);
 567         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 568         action->setData(logicalIndex);
 569         action->setEnabled(logicalIndex != DolphinModel::Name);
 570     }
 571     popup.addSeparator();
 572
 573     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 574     if (activatedAction != 0) {
 575         const bool show = activatedAction->isChecked();
 576         const int columnIndex = activatedAction->data().toInt();
 577
 578         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 579         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 580         if (show) {
 581             Q_ASSERT(!list.contains(info));
 582             list.append(info);
 583         } else {
 584             Q_ASSERT(list.contains(info));
 585             const int index = list.indexOf(info);
 586             list.removeAt(index);
 587         }
 588
 589         m_controller->indicateAdditionalInfoChange(list);
 590         setColumnHidden(columnIndex, !show);
 591         resizeColumns();
 592     }
 593 }
 594
 595 void DolphinDetailsView::updateColumnVisibility()
 596 {
 597     QHeaderView* headerView = header();
 598     disconnect(headerView, SIGNAL(sectionMoved(int, int, int)),
 599                this, SLOT(saveColumnPositions()));
 600
 601     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 602     const QList<int> columnPositions = settings->columnPositions();
 603
 604     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 605     for (int i = DolphinModel::Name; i <= DolphinModel::Version; ++i) {
 606         const KFileItemDelegate::Information info = infoForColumn(i);
 607         const bool hide = !list.contains(info) && (i != DolphinModel::Name);
 608         if (isColumnHidden(i) != hide) {
 609             setColumnHidden(i, hide);
 610         }
 611
 612         const int from = headerView->visualIndex(i);
 613         headerView->moveSection(from, columnPositions[i]);
 614     }
 615
 616     resizeColumns();
 617
 618     connect(headerView, SIGNAL(sectionMoved(int, int, int)),
 619             this, SLOT(saveColumnPositions()));
 620
 621 }
 622
 623 void DolphinDetailsView::saveColumnPositions()
 624 {
 625     QList<int> columnPositions;
 626     for (int i = DolphinModel::Name; i <= DolphinModel::Version; ++i) {
 627         columnPositions.append(header()->visualIndex(i));
 628     }
 629
 630     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 631     settings->setColumnPositions(columnPositions);
 632 }
 633
 634 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 635 {
 636     Q_UNUSED(logicalIndex);
 637     Q_UNUSED(oldSize);
 638     Q_UNUSED(newSize);
 639     // If the user changes the size of the headers, the autoresize feature should be
 640     // turned off. As there is no dedicated interface to find out whether the header
 641     // section has been resized by the user or by a resize event, another approach is used.
 642     // Attention: Take care when changing the if-condition to verify that there is no
 643     // regression in combination with bug 178630 (see fix in comment #8).
 644     if ((QApplication::mouseButtons() & Qt::LeftButton) && header()->underMouse()) {
 645         disableAutoResizing();
 646     }
 647 }
 648
 649 void DolphinDetailsView::slotActivationChanged(bool active)
 650 {
 651     setAlternatingRowColors(active);
 652 }
 653
 654 void DolphinDetailsView::disableAutoResizing()
 655 {
 656     m_autoResize = false;
 657 }
 658
 659 void DolphinDetailsView::requestActivation()
 660 {
 661     m_controller->requestActivation();
 662 }
 663
 664 void DolphinDetailsView::slotGlobalSettingsChanged(int category)
 665 {
 666     Q_UNUSED(category);
 667
 668     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 669     Q_ASSERT(settings != 0);
 670     if (settings->useSystemFont()) {
 671         m_font = KGlobalSettings::generalFont();
 672     }
 673     //Disconnect then reconnect, since the settings have been changed, the connection requirements may have also.
 674     disconnect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 675     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 676     if (KGlobalSettings::singleClick()) {
 677         connect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 678     } else {
 679         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 680     }
 681 }
 682
 683 void DolphinDetailsView::updateElasticBandSelection()
 684 {
 685     if (!m_band.show) {
 686         return;
 687     }
 688
 689     // Ensure the elastic band itself is up-to-date, in
 690     // case we are being called due to e.g. a drag event.
 691     updateElasticBand();
 692
 693     // Clip horizontally to the name column, as some filenames will be
 694     // longer than the column.  We don't clip vertically as origin
 695     // may be above or below the current viewport area.
 696     const int nameColumnX = header()->sectionPosition(DolphinModel::Name);
 697     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 698     QRect selRect = elasticBandRect().normalized();
 699     QRect nameColumnArea(nameColumnX, selRect.y(), nameColumnWidth, selRect.height());
 700     selRect = nameColumnArea.intersect(selRect).normalized();
 701     // Get the last elastic band rectangle, expressed in viewpoint coordinates.
 702     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 703     QRect oldSelRect = QRect(m_band.lastSelectionOrigin - scrollPos, m_band.lastSelectionDestination - scrollPos).normalized();
 704
 705     if (selRect.isNull()) {
 706         selectionModel()->select(m_band.originalSelection, QItemSelectionModel::ClearAndSelect);
 707         m_band.ignoreOldInfo = true;
 708         return;
 709     }
 710
 711     if (!m_band.ignoreOldInfo) {
 712         // Do some quick checks to see if we can rule out the need to
 713         // update the selection.
 714         Q_ASSERT(uniformRowHeights());
 715         QModelIndex dummyIndex = model()->index(0, 0);
 716         if (!dummyIndex.isValid()) {
 717             // No items in the model presumably.
 718             return;
 719         }
 720
 721         // If the elastic band does not cover the same rows as before, we'll
 722         // need to re-check, and also invalidate the old item distances.
 723         const int rowHeight = QTreeView::rowHeight(dummyIndex);
 724         const bool coveringSameRows =
 725             (selRect.top()    / rowHeight == oldSelRect.top()    / rowHeight) &&
 726             (selRect.bottom() / rowHeight == oldSelRect.bottom() / rowHeight);
 727         if (coveringSameRows) {
 728             // Covering the same rows, but have we moved far enough horizontally
 729             // that we might have (de)selected some other items?
 730             const bool itemSelectionChanged =
 731                 ((selRect.left() > oldSelRect.left()) &&
 732                  (selRect.left() > m_band.insideNearestLeftEdge)) ||
 733                 ((selRect.left() < oldSelRect.left()) &&
 734                  (selRect.left() <= m_band.outsideNearestLeftEdge)) ||
 735                 ((selRect.right() < oldSelRect.right()) &&
 736                  (selRect.left() >= m_band.insideNearestRightEdge)) ||
 737                 ((selRect.right() > oldSelRect.right()) &&
 738                  (selRect.right() >= m_band.outsideNearestRightEdge));
 739
 740             if (!itemSelectionChanged) {
 741                 return;
 742             }
 743         }
 744     }
 745     else {
 746         // This is the only piece of optimization data that needs to be explicitly
 747         // discarded.
 748         m_band.lastSelectionOrigin = QPoint();
 749         m_band.lastSelectionDestination = QPoint();
 750         oldSelRect = selRect;
 751     }
 752
 753     // Do the selection from scratch. Force a update of the horizontal distances info.
 754     m_band.insideNearestLeftEdge   = nameColumnX + nameColumnWidth + 1;
 755     m_band.insideNearestRightEdge  = nameColumnX - 1;
 756     m_band.outsideNearestLeftEdge  = nameColumnX - 1;
 757     m_band.outsideNearestRightEdge = nameColumnX + nameColumnWidth + 1;
 758
 759     // Include the old selection rect as well, so we can deselect
 760     // items that were inside it but not in the new selRect.
 761     const QRect boundingRect = selRect.united(oldSelRect).normalized();
 762     if (boundingRect.isNull()) {
 763         return;
 764     }
 765
 766     // Get the index of the item in this row in the name column.
 767     // TODO - would this still work if the columns could be re-ordered?
 768     QModelIndex startIndex = QTreeView::indexAt(boundingRect.topLeft());
 769     if (startIndex.parent().isValid()) {
 770         startIndex = startIndex.parent().child(startIndex.row(), KDirModel::Name);
 771     } else {
 772         startIndex = model()->index(startIndex.row(), KDirModel::Name);
 773     }
 774     if (!startIndex.isValid()) {
 775         selectionModel()->select(m_band.originalSelection, QItemSelectionModel::ClearAndSelect);
 776         m_band.ignoreOldInfo = true;
 777         return;
 778     }
 779
 780    // Go through all indexes between the top and bottom of boundingRect, and
 781    // update the selection.
 782    const int verticalCutoff = boundingRect.bottom();
 783    QModelIndex currIndex = startIndex;
 784    QModelIndex lastIndex;
 785    bool allItemsInBoundDone = false;
 786
 787    // Calling selectionModel()->select(...) for each item that needs to be
 788    // toggled is slow as each call emits selectionChanged(...) so store them
 789    // and do the selection toggle in one batch.
 790    QItemSelection itemsToToggle;
 791    // QItemSelection's deal with continuous ranges of indexes better than
 792    // single indexes, so try to portion items that need to be toggled into ranges.
 793    bool formingToggleIndexRange = false;
 794    QModelIndex toggleIndexRangeBegin = QModelIndex();
 795
 796    do {
 797        QRect currIndexRect = nameColumnRect(currIndex);
 798
 799         // Update some optimization info as we go.
 800        const int cr = currIndexRect.right();
 801        const int cl = currIndexRect.left();
 802        const int sl = selRect.left();
 803        const int sr = selRect.right();
 804        // "The right edge of the name is outside of the rect but nearer than m_outsideNearestLeft", etc
 805        if ((cr < sl && cr > m_band.outsideNearestLeftEdge)) {
 806            m_band.outsideNearestLeftEdge = cr;
 807        }
 808        if ((cl > sr && cl < m_band.outsideNearestRightEdge)) {
 809            m_band.outsideNearestRightEdge = cl;
 810        }
 811        if ((cl >= sl && cl <= sr && cl > m_band.insideNearestRightEdge)) {
 812            m_band.insideNearestRightEdge = cl;
 813        }
 814        if ((cr >= sl && cr <= sr && cr < m_band.insideNearestLeftEdge)) {
 815            m_band.insideNearestLeftEdge = cr;
 816        }
 817
 818        bool currentlySelected = selectionModel()->isSelected(currIndex);
 819        bool originallySelected = m_band.originalSelection.contains(currIndex);
 820        bool intersectsSelectedRect = currIndexRect.intersects(selRect);
 821        bool shouldBeSelected = (intersectsSelectedRect && !originallySelected) || (!intersectsSelectedRect && originallySelected);
 822        bool needToToggleItem = (currentlySelected && !shouldBeSelected) || (!currentlySelected && shouldBeSelected);
 823        if (needToToggleItem && !formingToggleIndexRange) {
 824             toggleIndexRangeBegin = currIndex;
 825             formingToggleIndexRange = true;
 826        }
 827
 828        // NOTE: indexBelow actually walks up and down expanded trees for us.
 829        QModelIndex nextIndex = indexBelow(currIndex);
 830        allItemsInBoundDone = !nextIndex.isValid() || currIndexRect.top() > verticalCutoff;
 831
 832        const bool commitToggleIndexRange = formingToggleIndexRange &&
 833                                            (!needToToggleItem ||
 834                                             allItemsInBoundDone ||
 835                                             currIndex.parent() != toggleIndexRangeBegin.parent());
 836        if (commitToggleIndexRange) {
 837            formingToggleIndexRange = false;
 838             // If this is the last item in the bounds and it is also the beginning of a range,
 839             // don't toggle lastIndex - it will already have been dealt with.
 840            if (!allItemsInBoundDone || toggleIndexRangeBegin != currIndex) {
 841                itemsToToggle.select(toggleIndexRangeBegin, lastIndex);
 842            }
 843             // Need to start a new range immediately with currIndex?
 844            if (needToToggleItem) {
 845                toggleIndexRangeBegin = currIndex;
 846                formingToggleIndexRange = true;
 847            }
 848            if (allItemsInBoundDone && needToToggleItem) {
 849                 // Toggle the very last item in the bounds.
 850                itemsToToggle.select(currIndex, currIndex);
 851            }
 852        }
 853
 854        // next item
 855        lastIndex = currIndex;
 856        currIndex = nextIndex;
 857     } while (!allItemsInBoundDone);
 858
 859     selectionModel()->select(itemsToToggle, QItemSelectionModel::Toggle);
 860
 861     m_band.lastSelectionOrigin = m_band.origin;
 862     m_band.lastSelectionDestination = m_band.destination;
 863     m_band.ignoreOldInfo = false;
 864 }
 865
 866 void DolphinDetailsView::setFoldersExpandable(bool expandable)
 867 {
 868     if (!expandable) {
 869         // collapse all expanded folders, as QTreeView::setItemsExpandable(false)
 870         // does not do this task
 871         const int rowCount = model()->rowCount();
 872         for (int row = 0; row < rowCount; ++row) {
 873             setExpanded(model()->index(row, 0), false);
 874         }
 875     }
 876     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 877     settings->setExpandableFolders(expandable);
 878     setRootIsDecorated(expandable);
 879     setItemsExpandable(expandable);
 880 }
 881
 882 void DolphinDetailsView::updateDecorationSize(bool showPreview)
 883 {
 884     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 885     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 886     setIconSize(QSize(iconSize, iconSize));
 887     m_decorationSize = QSize(iconSize, iconSize);
 888
 889     doItemsLayout();
 890 }
 891
 892 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 893 {
 894     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 895
 896     switch (columnIndex) {
 897     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 898     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 899     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 900     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 901     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 902     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 903     default: break;
 904     }
 905
 906     return info;
 907 }
 908
 909 void DolphinDetailsView::resizeColumns()
 910 {
 911     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 912     // around 3 seconds for each (!) resize operation when having > 10000 items).
 913     // This gets a problem especially when opening large directories, where several
 914     // resize operations are received for showing the currently available items during
 915     // loading (the application hangs around 20 seconds when loading > 10000 items).
 916
 917     QHeaderView* headerView = header();
 918     QFontMetrics fontMetrics(viewport()->font());
 919
 920     int columnWidth[DolphinModel::Version + 1];
 921     columnWidth[DolphinModel::Size] = fontMetrics.width("00000 Items");
 922     columnWidth[DolphinModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 923     columnWidth[DolphinModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 924     columnWidth[DolphinModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 925     columnWidth[DolphinModel::Group] = fontMetrics.width("xxxxxxxxxx");
 926     columnWidth[DolphinModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 927     columnWidth[DolphinModel::Version] = fontMetrics.width("xxxxxxxx");
 928
 929     int requiredWidth = 0;
 930     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 931         if (!isColumnHidden(i)) {
 932             columnWidth[i] += 20; // provide a default gap
 933             requiredWidth += columnWidth[i];
 934             headerView->resizeSection(i, columnWidth[i]);
 935         }
 936     }
 937
 938     // resize the name column in a way that the whole available width is used
 939     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 940
 941     const int minNameWidth = 300;
 942     if (columnWidth[KDirModel::Name] < minNameWidth) {
 943         columnWidth[KDirModel::Name] = minNameWidth;
 944
 945         // It might be possible that the name column width can be
 946         // decreased without clipping any text. For performance
 947         // reasons the exact necessary width for full visible names is
 948         // only checked for up to 200 items:
 949         const int rowCount = model()->rowCount();
 950         if (rowCount > 0 && rowCount < 200) {
 951             const int nameWidth = sizeHintForColumn(DolphinModel::Name);
 952             if (nameWidth + requiredWidth <= viewport()->width()) {
 953                 columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 954             } else if (nameWidth < minNameWidth) {
 955                 columnWidth[KDirModel::Name] = nameWidth;
 956             }
 957         }
 958     }
 959
 960     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 961 }
 962
 963 QRect DolphinDetailsView::nameColumnRect(const QModelIndex& index) const
 964 {
 965     QRect rect = visualRect(index);
 966     const KFileItem item = m_controller->itemForIndex(index);
 967     if (!item.isNull()) {
 968         const int width = DolphinFileItemDelegate::nameColumnWidth(item.text(), viewOptions());
 969         rect.setWidth(width);
 970     }
 971
 972     return rect;
 973 }
 974
 975 bool DolphinDetailsView::isAboveExpandingToggle(const QPoint& pos) const
 976 {
 977     // QTreeView offers no public API to get the information whether an index has an
 978     // expanding toggle and what boundaries the toggle has. The following approach
 979     // also assumes a toggle for file items.
 980     if (itemsExpandable()) {
 981         const QModelIndex index = QTreeView::indexAt(pos);
 982         if (index.isValid() && (index.column() == KDirModel::Name)) {
 983             QRect rect = nameColumnRect(index);
 984             const int toggleSize = rect.height();
 985             if (isRightToLeft()) {
 986                 rect.moveRight(rect.right());
 987             } else {
 988                 rect.moveLeft(rect.x() - toggleSize);
 989             }
 990             rect.setWidth(toggleSize);
 991
 992             QStyleOption opt;
 993             opt.initFrom(this);
 994             opt.rect = rect;
 995             rect = style()->subElementRect(QStyle::SE_TreeViewDisclosureItem, &opt, this);
 996
 997             return rect.contains(pos);
 998         }
 999     }
1000     return false;
1001 }
1002
1003 DolphinDetailsView::ElasticBand::ElasticBand() :
1004     show(false),
1005     origin(),
1006     destination(),
1007     lastSelectionOrigin(),
1008     lastSelectionDestination(),
1009     ignoreOldInfo(true),
1010     outsideNearestLeftEdge(0),
1011     outsideNearestRightEdge(0),
1012     insideNearestLeftEdge(0),
1013     insideNearestRightEdge(0)
1014 {
1015 }
1016
1017 #include "dolphindetailsview.moc"