src/views/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 "additionalinfoaccessor.h"
  24 #include "dolphinmodel.h"
  25 #include "dolphinviewcontroller.h"
  26 #include "dolphinfileitemdelegate.h"
  27 #include "settings/dolphinsettings.h"
  28 #include "dolphinsortfilterproxymodel.h"
  29 #include "dolphinviewautoscroller.h"
  30 #include "draganddrophelper.h"
  31 #include "viewextensionsfactory.h"
  32 #include "viewmodecontroller.h"
  33 #include "viewproperties.h"
  34 #include "zoomlevelinfo.h"
  35
  36 #include "dolphin_detailsmodesettings.h"
  37 #include "dolphin_generalsettings.h"
  38
  39 #include <kdirmodel.h>
  40 #include <klocale.h>
  41 #include <kmenu.h>
  42
  43 #include <QAction>
  44 #include <QApplication>
  45 #include <QHeaderView>
  46 #include <QRubberBand>
  47 #include <QPainter>
  48 #include <QScrollBar>
  49
  50 DolphinDetailsView::DolphinDetailsView(QWidget* parent,
  51                                        DolphinViewController* dolphinViewController,
  52                                        const ViewModeController* viewModeController,
  53                                        DolphinSortFilterProxyModel* proxyModel) :
  54     QTreeView(parent),
  55     m_autoResize(true),
  56     m_expandingTogglePressed(false),
  57     m_keyPressed(false),
  58     m_useDefaultIndexAt(true),
  59     m_ignoreScrollTo(false),
  60     m_dolphinViewController(dolphinViewController),
  61     m_viewModeController(viewModeController),
  62     m_extensionsFactory(0),
  63     m_expandableFoldersAction(0),
  64     m_expandedUrls(),
  65     m_font(),
  66     m_decorationSize(),
  67     m_band()
  68 {
  69     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  70     Q_ASSERT(settings != 0);
  71     Q_ASSERT(dolphinViewController != 0);
  72     Q_ASSERT(viewModeController != 0);
  73
  74     setLayoutDirection(Qt::LeftToRight);
  75     setAcceptDrops(true);
  76     setSortingEnabled(true);
  77     setUniformRowHeights(true);
  78     setSelectionBehavior(SelectItems);
  79     setDragDropMode(QAbstractItemView::DragDrop);
  80     setDropIndicatorShown(false);
  81     setAlternatingRowColors(true);
  82     setRootIsDecorated(settings->expandableFolders());
  83     setItemsExpandable(settings->expandableFolders());
  84     setEditTriggers(QAbstractItemView::NoEditTriggers);
  85     setModel(proxyModel);
  86
  87     setMouseTracking(true);
  88
  89     const ViewProperties props(viewModeController->url());
  90     setSortIndicatorSection(props.sorting());
  91     setSortIndicatorOrder(props.sortOrder());
  92
  93     QHeaderView* headerView = header();
  94     connect(headerView, SIGNAL(sectionClicked(int)),
  95             this, SLOT(synchronizeSortingState(int)));
  96     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  97     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  98             this, SLOT(configureSettings(const QPoint&)));
  99     connect(headerView, SIGNAL(sectionResized(int, int, int)),
 100             this, SLOT(slotHeaderSectionResized(int, int, int)));
 101     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
 102             this, SLOT(disableAutoResizing()));
 103
 104     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
 105             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
 106     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
 107             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
 108
 109     connect(this, SIGNAL(clicked(const QModelIndex&)),
 110             dolphinViewController, SLOT(requestTab(const QModelIndex&)));
 111     if (KGlobalSettings::singleClick()) {
 112         connect(this, SIGNAL(clicked(const QModelIndex&)),
 113                 dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 114     } else {
 115         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 116                 dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 117     }
 118
 119     connect(this, SIGNAL(entered(const QModelIndex&)),
 120             this, SLOT(slotEntered(const QModelIndex&)));
 121     connect(this, SIGNAL(viewportEntered()),
 122             dolphinViewController, SLOT(emitViewportEntered()));
 123     connect(viewModeController, SIGNAL(zoomLevelChanged(int)),
 124             this, SLOT(setZoomLevel(int)));
 125     connect(dolphinViewController->view(), SIGNAL(additionalInfoChanged()),
 126             this, SLOT(updateColumnVisibility()));
 127     connect(viewModeController, SIGNAL(activationChanged(bool)),
 128             this, SLOT(slotActivationChanged(bool)));
 129
 130     if (settings->useSystemFont()) {
 131         m_font = KGlobalSettings::generalFont();
 132     } else {
 133         m_font = QFont(settings->fontFamily(),
 134                        qRound(settings->fontSize()),
 135                        settings->fontWeight(),
 136                        settings->italicFont());
 137         m_font.setPointSizeF(settings->fontSize());
 138     }
 139
 140     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 141     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 142
 143     const DolphinView* view = dolphinViewController->view();
 144     connect(view, SIGNAL(showPreviewChanged()),
 145             this, SLOT(slotShowPreviewChanged()));
 146
 147
 148     setFocus();
 149     viewport()->installEventFilter(this);
 150
 151     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 152             this, SLOT(slotGlobalSettingsChanged(int)));
 153
 154     m_useDefaultIndexAt = false;
 155
 156     m_expandableFoldersAction = new QAction(i18nc("@option:check", "Expandable Folders"), this);
 157     m_expandableFoldersAction->setCheckable(true);
 158     connect(m_expandableFoldersAction, SIGNAL(toggled(bool)),
 159             this, SLOT(setFoldersExpandable(bool)));
 160
 161     connect(this, SIGNAL(expanded(const QModelIndex&)), this, SLOT(slotExpanded(const QModelIndex&)));
 162     connect(this, SIGNAL(collapsed(const QModelIndex&)), this, SLOT(slotCollapsed(const QModelIndex&)));
 163
 164     updateDecorationSize(view->showPreview());
 165
 166     m_extensionsFactory = new ViewExtensionsFactory(this, dolphinViewController, viewModeController);
 167     m_extensionsFactory->fileItemDelegate()->setMinimizedNameColumn(true);
 168     m_extensionsFactory->setAutoFolderExpandingEnabled(settings->expandableFolders());
 169 }
 170
 171 DolphinDetailsView::~DolphinDetailsView()
 172 {
 173 }
 174
 175 QSet<KUrl> DolphinDetailsView::expandedUrls() const
 176 {
 177     return m_expandedUrls;
 178 }
 179
 180 QRegion DolphinDetailsView::visualRegionForSelection(const QItemSelection& selection) const
 181 {
 182     // We have to make sure that the visualRect of each model index is inside the region.
 183     // QTreeView::visualRegionForSelection does not do it right because it assumes implicitly
 184     // that all visualRects have the same width, which is in general not the case here.
 185     QRegion selectionRegion;
 186     const QModelIndexList indexes = selection.indexes();
 187
 188     foreach(const QModelIndex& index, indexes) {
 189         selectionRegion += visualRect(index);
 190     }
 191
 192     return selectionRegion;
 193 }
 194
 195 bool DolphinDetailsView::event(QEvent* event)
 196 {
 197     switch (event->type()) {
 198     case QEvent::Polish:
 199         header()->setResizeMode(QHeaderView::Interactive);
 200         updateColumnVisibility();
 201         break;
 202
 203     case QEvent::FocusOut:
 204         // If a key-press triggers an action that e. g. opens a dialog, the
 205         // widget gets no key-release event. Assure that the pressed state
 206         // is reset to prevent accidently setting the current index during a selection.
 207         m_keyPressed = false;
 208         break;
 209
 210     default:
 211         break;
 212     }
 213
 214     return QTreeView::event(event);
 215 }
 216
 217 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 218 {
 219     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 220     viewOptions.font = m_font;
 221     viewOptions.fontMetrics = QFontMetrics(m_font);
 222     viewOptions.showDecorationSelected = true;
 223     viewOptions.decorationSize = m_decorationSize;
 224     return viewOptions;
 225 }
 226
 227 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 228 {
 229     QTreeView::contextMenuEvent(event);
 230
 231     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 232     m_expandableFoldersAction->setChecked(settings->expandableFolders());
 233     m_dolphinViewController->triggerContextMenuRequest(event->pos(),
 234                                             QList<QAction*>() << m_expandableFoldersAction);
 235 }
 236
 237 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 238 {
 239     m_dolphinViewController->requestActivation();
 240
 241     const QModelIndex current = currentIndex();
 242     QTreeView::mousePressEvent(event);
 243
 244     m_expandingTogglePressed = isAboveExpandingToggle(event->pos());
 245
 246     const QModelIndex index = indexAt(event->pos());
 247     const bool updateState = index.isValid() &&
 248                              (index.column() == DolphinModel::Name) &&
 249                              (event->button() == Qt::LeftButton);
 250     if (updateState) {
 251         setState(QAbstractItemView::DraggingState);
 252     }
 253
 254     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 255         // the mouse press is done somewhere outside the filename column
 256         if (QApplication::mouseButtons() & Qt::MidButton) {
 257             m_dolphinViewController->replaceUrlByClipboard();
 258         }
 259
 260         const Qt::KeyboardModifiers mod = QApplication::keyboardModifiers();
 261         if (!m_expandingTogglePressed && !(mod & Qt::ShiftModifier) && !(mod & Qt::ControlModifier)) {
 262             clearSelection();
 263         }
 264
 265         // restore the current index, other columns are handled as viewport area.
 266         // setCurrentIndex(...) implicitly calls scrollTo(...), which we want to ignore.
 267         m_ignoreScrollTo = true;
 268         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 269         m_ignoreScrollTo = false;
 270
 271         if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 272             // Inform Qt about what we are doing - otherwise it starts dragging items around!
 273             setState(DragSelectingState);
 274             m_band.show = true;
 275             // Incremental update data will not be useful - start from scratch.
 276             m_band.ignoreOldInfo = true;
 277             const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 278             m_band.origin = event->pos()  + scrollPos;
 279             m_band.destination = m_band.origin;
 280             m_band.originalSelection = selectionModel()->selection();
 281         }
 282     }
 283 }
 284
 285 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 286 {
 287     if (m_expandingTogglePressed) {
 288         // Per default QTreeView starts either a selection or a drag operation when dragging
 289         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 290         // Turn off this behavior in Dolphin to stay predictable:
 291         setState(QAbstractItemView::NoState);
 292         return;
 293     }
 294
 295     if (m_band.show) {
 296         const QPoint mousePos = event->pos();
 297         const QModelIndex index = indexAt(mousePos);
 298         if (!index.isValid()) {
 299             // the destination of the selection rectangle is above the viewport. In this
 300             // case QTreeView does no selection at all, which is not the wanted behavior
 301             // in Dolphin -> select all items within the elastic band rectangle
 302             updateElasticBandSelection();
 303         }
 304
 305         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 306         // as the Qt-issue #199631 has been fixed.
 307         // QTreeView::mouseMoveEvent(event);
 308         QAbstractItemView::mouseMoveEvent(event);
 309         updateElasticBand();
 310     } else {
 311         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 312         // as the Qt-issue #199631 has been fixed.
 313         // QTreeView::mouseMoveEvent(event);
 314         QAbstractItemView::mouseMoveEvent(event);
 315     }
 316 }
 317
 318 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 319 {
 320     if (!m_expandingTogglePressed) {
 321         const QModelIndex index = indexAt(event->pos());
 322         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 323             QTreeView::mouseReleaseEvent(event);
 324         } else {
 325             // don't change the current index if the cursor is released
 326             // above any other column than the name column, as the other
 327             // columns act as viewport
 328             const QModelIndex current = currentIndex();
 329             QTreeView::mouseReleaseEvent(event);
 330             selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 331         }
 332     }
 333     m_expandingTogglePressed = false;
 334
 335     if (m_band.show) {
 336         setState(NoState);
 337         updateElasticBand();
 338         m_band.show = false;
 339     }
 340 }
 341
 342 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 343 {
 344     DragAndDropHelper::instance().startDrag(this, supportedActions, m_dolphinViewController);
 345     m_band.show = false;
 346 }
 347
 348 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 349 {
 350     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 351         event->acceptProposedAction();
 352     }
 353
 354     if (m_band.show) {
 355         updateElasticBand();
 356         m_band.show = false;
 357     }
 358 }
 359
 360 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 361 {
 362     QTreeView::dragLeaveEvent(event);
 363     setDirtyRegion(m_dropRect);
 364 }
 365
 366 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 367 {
 368     QTreeView::dragMoveEvent(event);
 369
 370     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 371     setDirtyRegion(m_dropRect);
 372     const QModelIndex index = indexAt(event->pos());
 373     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 374         const KFileItem item = m_dolphinViewController->itemForIndex(index);
 375         if (!item.isNull() && item.isDir()) {
 376             m_dropRect = visualRect(index);
 377         } else {
 378             m_dropRect.setSize(QSize()); // set as invalid
 379         }
 380         setDirtyRegion(m_dropRect);
 381     }
 382
 383     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 384         // accept url drops, independently from the destination item
 385         event->acceptProposedAction();
 386     }
 387 }
 388
 389 void DolphinDetailsView::dropEvent(QDropEvent* event)
 390 {
 391     const QModelIndex index = indexAt(event->pos());
 392     KFileItem item;
 393     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 394         item = m_dolphinViewController->itemForIndex(index);
 395     }
 396     m_dolphinViewController->indicateDroppedUrls(item, m_viewModeController->url(), event);
 397     QTreeView::dropEvent(event);
 398 }
 399
 400 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 401 {
 402     QTreeView::paintEvent(event);
 403     if (m_band.show) {
 404         // The following code has been taken from QListView
 405         // and adapted to DolphinDetailsView.
 406         // (C) 1992-2007 Trolltech ASA
 407         QStyleOptionRubberBand opt;
 408         opt.initFrom(this);
 409         opt.shape = QRubberBand::Rectangle;
 410         opt.opaque = false;
 411         opt.rect = elasticBandRect();
 412
 413         QPainter painter(viewport());
 414         painter.save();
 415         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 416         painter.restore();
 417     }
 418 }
 419
 420 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 421 {
 422     // If the Control modifier is pressed, a multiple selection
 423     // is done and DolphinDetailsView::currentChanged() may not
 424     // not change the selection in a custom way.
 425     m_keyPressed = !(event->modifiers() & Qt::ControlModifier);
 426
 427     QTreeView::keyPressEvent(event);
 428     m_dolphinViewController->handleKeyPressEvent(event);
 429 }
 430
 431 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 432 {
 433     QTreeView::keyReleaseEvent(event);
 434     m_keyPressed = false;
 435 }
 436
 437 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 438 {
 439     QTreeView::resizeEvent(event);
 440     if (m_autoResize) {
 441         resizeColumns();
 442     }
 443 }
 444
 445 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 446 {
 447     const int step = m_decorationSize.height();
 448     verticalScrollBar()->setSingleStep(step);
 449     QTreeView::wheelEvent(event);
 450 }
 451
 452 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 453 {
 454     QTreeView::currentChanged(current, previous);
 455     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 456
 457     // Stay consistent with QListView: When changing the current index by key presses,
 458     // also change the selection.
 459     if (m_keyPressed) {
 460         setCurrentIndex(current);
 461     }
 462
 463     // If folders are expanded, the width which is available for editing may have changed
 464     // because it depends on the level of the current item in the folder hierarchy.
 465     adjustMaximumSizeForEditing(current);
 466 }
 467
 468 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 469 {
 470     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 471         // if the mouse is above an item and moved very fast outside the widget,
 472         // no viewportEntered() signal might be emitted although the mouse has been moved
 473         // above the viewport
 474         m_dolphinViewController->emitViewportEntered();
 475     }
 476
 477     return QTreeView::eventFilter(watched, event);
 478 }
 479
 480 QModelIndex DolphinDetailsView::indexAt(const QPoint& point) const
 481 {
 482     // the blank portion of the name column counts as empty space
 483     const QModelIndex index = QTreeView::indexAt(point);
 484     const bool isAboveEmptySpace  = !m_useDefaultIndexAt &&
 485                                     (index.column() == KDirModel::Name) && !visualRect(index).contains(point);
 486     return isAboveEmptySpace ? QModelIndex() : index;
 487 }
 488
 489 QRect DolphinDetailsView::visualRect(const QModelIndex& index) const
 490 {
 491     QRect rect = QTreeView::visualRect(index);
 492     const KFileItem item = m_dolphinViewController->itemForIndex(index);
 493     if (!item.isNull()) {
 494         const int width = DolphinFileItemDelegate::nameColumnWidth(item.text(), viewOptions());
 495         rect.setWidth(width);
 496     }
 497
 498     return rect;
 499 }
 500
 501 void DolphinDetailsView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags command)
 502 {
 503     // We must override setSelection() as Qt calls it internally and when this happens
 504     // we must ensure that the default indexAt() is used.
 505     if (!m_band.show) {
 506         m_useDefaultIndexAt = true;
 507         QTreeView::setSelection(rect, command);
 508         m_useDefaultIndexAt = false;
 509     } else {
 510         // Use our own elastic band selection algorithm
 511         updateElasticBandSelection();
 512     }
 513 }
 514
 515 void DolphinDetailsView::scrollTo(const QModelIndex & index, ScrollHint hint)
 516 {
 517     if (!m_ignoreScrollTo) {
 518         QTreeView::scrollTo(index, hint);
 519     }
 520 }
 521
 522 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 523 {
 524     header()->setSortIndicator(sorting, header()->sortIndicatorOrder());
 525 }
 526
 527 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 528 {
 529     header()->setSortIndicator(header()->sortIndicatorSection(), sortOrder);
 530 }
 531
 532 void DolphinDetailsView::synchronizeSortingState(int column)
 533 {
 534     // The sorting has already been changed in QTreeView if this slot is
 535     // invoked, but Dolphin is not informed about this.
 536     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 537     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 538     m_dolphinViewController->indicateSortingChange(sorting);
 539     m_dolphinViewController->indicateSortOrderChange(sortOrder);
 540 }
 541
 542 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 543 {
 544     if (index.column() == DolphinModel::Name) {
 545         m_dolphinViewController->emitItemEntered(index);
 546     } else {
 547         m_dolphinViewController->emitViewportEntered();
 548     }
 549 }
 550
 551 void DolphinDetailsView::updateElasticBand()
 552 {
 553     if (m_band.show) {
 554         QRect dirtyRegion(elasticBandRect());
 555         const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 556         m_band.destination = viewport()->mapFromGlobal(QCursor::pos()) + scrollPos;
 557         // Going above the (logical) top-left of the view causes complications during selection;
 558         // we may as well prevent it.
 559         if (m_band.destination.y() < 0) {
 560             m_band.destination.setY(0);
 561         }
 562         if (m_band.destination.x() < 0) {
 563             m_band.destination.setX(0);
 564         }
 565         dirtyRegion = dirtyRegion.united(elasticBandRect());
 566         setDirtyRegion(dirtyRegion);
 567     }
 568 }
 569
 570 QRect DolphinDetailsView::elasticBandRect() const
 571 {
 572     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 573
 574     const QPoint topLeft = m_band.origin - scrollPos;
 575     const QPoint bottomRight = m_band.destination - scrollPos;
 576     return QRect(topLeft, bottomRight).normalized();
 577 }
 578
 579 void DolphinDetailsView::setZoomLevel(int level)
 580 {
 581     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 582     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 583
 584     const bool showPreview = m_dolphinViewController->view()->showPreview();
 585     if (showPreview) {
 586         settings->setPreviewSize(size);
 587     } else {
 588         settings->setIconSize(size);
 589     }
 590
 591     updateDecorationSize(showPreview);
 592 }
 593
 594 void DolphinDetailsView::slotShowPreviewChanged()
 595 {
 596     const DolphinView* view = m_dolphinViewController->view();
 597     updateDecorationSize(view->showPreview());
 598 }
 599
 600 void DolphinDetailsView::configureSettings(const QPoint& pos)
 601 {
 602     KMenu popup(this);
 603     popup.addTitle(i18nc("@title:menu", "Columns"));
 604
 605     // add checkbox items for each column
 606     QHeaderView* headerView = header();
 607     const int columns = model()->columnCount();
 608     for (int i = 0; i < columns; ++i) {
 609         const int logicalIndex = headerView->logicalIndex(i);
 610         const QString text = model()->headerData(logicalIndex, Qt::Horizontal).toString();
 611         if (!text.isEmpty()) {
 612             QAction* action = popup.addAction(text);
 613             action->setCheckable(true);
 614             action->setChecked(!headerView->isSectionHidden(logicalIndex));
 615             action->setData(logicalIndex);
 616             action->setEnabled(logicalIndex != DolphinModel::Name);
 617         }
 618     }
 619     popup.addSeparator();
 620
 621     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 622     if (activatedAction != 0) {
 623         const bool show = activatedAction->isChecked();
 624         const int columnIndex = activatedAction->data().toInt();
 625
 626         KFileItemDelegate::InformationList list = m_dolphinViewController->view()->additionalInfo();
 627         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 628         if (show) {
 629             Q_ASSERT(!list.contains(info));
 630             list.append(info);
 631         } else {
 632             Q_ASSERT(list.contains(info));
 633             const int index = list.indexOf(info);
 634             list.removeAt(index);
 635         }
 636
 637         m_dolphinViewController->indicateAdditionalInfoChange(list);
 638         setColumnHidden(columnIndex, !show);
 639         resizeColumns();
 640     }
 641 }
 642
 643 void DolphinDetailsView::updateColumnVisibility()
 644 {
 645     QHeaderView* headerView = header();
 646     disconnect(headerView, SIGNAL(sectionMoved(int, int, int)),
 647                this, SLOT(saveColumnPositions()));
 648
 649     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 650     const QList<int> columnPositions = settings->columnPositions();
 651
 652     const KFileItemDelegate::InformationList list = m_dolphinViewController->view()->additionalInfo();
 653     for (int i = DolphinModel::Name; i < DolphinModel::ExtraColumnCount; ++i) {
 654         const KFileItemDelegate::Information info = infoForColumn(i);
 655         const bool hide = !list.contains(info) && (i != DolphinModel::Name);
 656         if (isColumnHidden(i) != hide) {
 657             setColumnHidden(i, hide);
 658         }
 659
 660         // If the list columnPositions has been written by an older Dolphin version,
 661         // its length might be smaller than DolphinModel::ExtraColumnCount. Therefore,
 662         // we have to check if item number i exists before accessing it.
 663         if (i < columnPositions.length()) {
 664             const int position = columnPositions[i];
 665
 666             // The position might be outside the correct range if the list columnPositions
 667             // has been written by a newer Dolphin version with more columns.
 668             if (position < DolphinModel::ExtraColumnCount) {
 669                 const int from = headerView->visualIndex(i);
 670                 headerView->moveSection(from, position);
 671             }
 672         }
 673     }
 674
 675     resizeColumns();
 676
 677     connect(headerView, SIGNAL(sectionMoved(int, int, int)),
 678             this, SLOT(saveColumnPositions()));
 679 }
 680
 681 void DolphinDetailsView::saveColumnPositions()
 682 {
 683     QList<int> columnPositions;
 684     for (int i = DolphinModel::Name; i < DolphinModel::ExtraColumnCount; ++i) {
 685         columnPositions.append(header()->visualIndex(i));
 686     }
 687
 688     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 689     settings->setColumnPositions(columnPositions);
 690 }
 691
 692 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 693 {
 694     Q_UNUSED(logicalIndex);
 695     Q_UNUSED(oldSize);
 696     Q_UNUSED(newSize);
 697     // If the user changes the size of the headers, the autoresize feature should be
 698     // turned off. As there is no dedicated interface to find out whether the header
 699     // section has been resized by the user or by a resize event, another approach is used.
 700     // Attention: Take care when changing the if-condition to verify that there is no
 701     // regression in combination with bug 178630 (see fix in comment #8).
 702     if ((QApplication::mouseButtons() & Qt::LeftButton) && header()->underMouse()) {
 703         disableAutoResizing();
 704     }
 705
 706     adjustMaximumSizeForEditing(currentIndex());
 707 }
 708
 709 void DolphinDetailsView::slotActivationChanged(bool active)
 710 {
 711     setAlternatingRowColors(active);
 712 }
 713
 714 void DolphinDetailsView::disableAutoResizing()
 715 {
 716     m_autoResize = false;
 717 }
 718
 719 void DolphinDetailsView::requestActivation()
 720 {
 721     m_dolphinViewController->requestActivation();
 722 }
 723
 724 void DolphinDetailsView::slotGlobalSettingsChanged(int category)
 725 {
 726     Q_UNUSED(category);
 727
 728     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 729     Q_ASSERT(settings != 0);
 730     if (settings->useSystemFont()) {
 731         m_font = KGlobalSettings::generalFont();
 732     }
 733     //Disconnect then reconnect, since the settings have been changed, the connection requirements may have also.
 734     disconnect(this, SIGNAL(clicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 735     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 736     if (KGlobalSettings::singleClick()) {
 737         connect(this, SIGNAL(clicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 738     } else {
 739         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 740     }
 741 }
 742
 743 void DolphinDetailsView::updateElasticBandSelection()
 744 {
 745     if (!m_band.show) {
 746         return;
 747     }
 748
 749     // Ensure the elastic band itself is up-to-date, in
 750     // case we are being called due to e.g. a drag event.
 751     updateElasticBand();
 752
 753     // Clip horizontally to the name column, as some filenames will be
 754     // longer than the column.  We don't clip vertically as origin
 755     // may be above or below the current viewport area.
 756     const int nameColumnX = header()->sectionPosition(DolphinModel::Name);
 757     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 758     QRect selRect = elasticBandRect().normalized();
 759     QRect nameColumnArea(nameColumnX, selRect.y(), nameColumnWidth, selRect.height());
 760     selRect = nameColumnArea.intersect(selRect).normalized();
 761     // Get the last elastic band rectangle, expressed in viewpoint coordinates.
 762     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 763     QRect oldSelRect = QRect(m_band.lastSelectionOrigin - scrollPos, m_band.lastSelectionDestination - scrollPos).normalized();
 764
 765     if (selRect.isNull()) {
 766         selectionModel()->select(m_band.originalSelection, QItemSelectionModel::ClearAndSelect);
 767         m_band.ignoreOldInfo = true;
 768         return;
 769     }
 770
 771     if (!m_band.ignoreOldInfo) {
 772         // Do some quick checks to see if we can rule out the need to
 773         // update the selection.
 774         Q_ASSERT(uniformRowHeights());
 775         QModelIndex dummyIndex = model()->index(0, 0);
 776         if (!dummyIndex.isValid()) {
 777             // No items in the model presumably.
 778             return;
 779         }
 780
 781         // If the elastic band does not cover the same rows as before, we'll
 782         // need to re-check, and also invalidate the old item distances.
 783         const int rowHeight = QTreeView::rowHeight(dummyIndex);
 784         const bool coveringSameRows =
 785             (selRect.top()    / rowHeight == oldSelRect.top()    / rowHeight) &&
 786             (selRect.bottom() / rowHeight == oldSelRect.bottom() / rowHeight);
 787         if (coveringSameRows) {
 788             // Covering the same rows, but have we moved far enough horizontally
 789             // that we might have (de)selected some other items?
 790             const bool itemSelectionChanged =
 791                 ((selRect.left() > oldSelRect.left()) &&
 792                  (selRect.left() > m_band.insideNearestLeftEdge)) ||
 793                 ((selRect.left() < oldSelRect.left()) &&
 794                  (selRect.left() <= m_band.outsideNearestLeftEdge)) ||
 795                 ((selRect.right() < oldSelRect.right()) &&
 796                  (selRect.left() >= m_band.insideNearestRightEdge)) ||
 797                 ((selRect.right() > oldSelRect.right()) &&
 798                  (selRect.right() >= m_band.outsideNearestRightEdge));
 799
 800             if (!itemSelectionChanged) {
 801                 return;
 802             }
 803         }
 804     } else {
 805         // This is the only piece of optimization data that needs to be explicitly
 806         // discarded.
 807         m_band.lastSelectionOrigin = QPoint();
 808         m_band.lastSelectionDestination = QPoint();
 809         oldSelRect = selRect;
 810     }
 811
 812     // Do the selection from scratch. Force a update of the horizontal distances info.
 813     m_band.insideNearestLeftEdge   = nameColumnX + nameColumnWidth + 1;
 814     m_band.insideNearestRightEdge  = nameColumnX - 1;
 815     m_band.outsideNearestLeftEdge  = nameColumnX - 1;
 816     m_band.outsideNearestRightEdge = nameColumnX + nameColumnWidth + 1;
 817
 818     // Include the old selection rect as well, so we can deselect
 819     // items that were inside it but not in the new selRect.
 820     const QRect boundingRect = selRect.united(oldSelRect).normalized();
 821     if (boundingRect.isNull()) {
 822         return;
 823     }
 824
 825     // Get the index of the item in this row in the name column.
 826     // TODO - would this still work if the columns could be re-ordered?
 827     QModelIndex startIndex = QTreeView::indexAt(boundingRect.topLeft());
 828     if (startIndex.parent().isValid()) {
 829         startIndex = startIndex.parent().child(startIndex.row(), KDirModel::Name);
 830     } else {
 831         startIndex = model()->index(startIndex.row(), KDirModel::Name);
 832     }
 833     if (!startIndex.isValid()) {
 834         selectionModel()->select(m_band.originalSelection, QItemSelectionModel::ClearAndSelect);
 835         m_band.ignoreOldInfo = true;
 836         return;
 837     }
 838
 839    // Go through all indexes between the top and bottom of boundingRect, and
 840    // update the selection.
 841    const int verticalCutoff = boundingRect.bottom();
 842    QModelIndex currIndex = startIndex;
 843    QModelIndex lastIndex;
 844    bool allItemsInBoundDone = false;
 845
 846    // Calling selectionModel()->select(...) for each item that needs to be
 847    // toggled is slow as each call emits selectionChanged(...) so store them
 848    // and do the selection toggle in one batch.
 849    QItemSelection itemsToToggle;
 850    // QItemSelection's deal with continuous ranges of indexes better than
 851    // single indexes, so try to portion items that need to be toggled into ranges.
 852    bool formingToggleIndexRange = false;
 853    QModelIndex toggleIndexRangeBegin = QModelIndex();
 854
 855    do {
 856        QRect currIndexRect = visualRect(currIndex);
 857
 858         // Update some optimization info as we go.
 859        const int cr = currIndexRect.right();
 860        const int cl = currIndexRect.left();
 861        const int sl = selRect.left();
 862        const int sr = selRect.right();
 863        // "The right edge of the name is outside of the rect but nearer than m_outsideNearestLeft", etc
 864        if ((cr < sl && cr > m_band.outsideNearestLeftEdge)) {
 865            m_band.outsideNearestLeftEdge = cr;
 866        }
 867        if ((cl > sr && cl < m_band.outsideNearestRightEdge)) {
 868            m_band.outsideNearestRightEdge = cl;
 869        }
 870        if ((cl >= sl && cl <= sr && cl > m_band.insideNearestRightEdge)) {
 871            m_band.insideNearestRightEdge = cl;
 872        }
 873        if ((cr >= sl && cr <= sr && cr < m_band.insideNearestLeftEdge)) {
 874            m_band.insideNearestLeftEdge = cr;
 875        }
 876
 877        bool currentlySelected = selectionModel()->isSelected(currIndex);
 878        bool originallySelected = m_band.originalSelection.contains(currIndex);
 879        bool intersectsSelectedRect = currIndexRect.intersects(selRect);
 880        bool shouldBeSelected = (intersectsSelectedRect && !originallySelected) || (!intersectsSelectedRect && originallySelected);
 881        bool needToToggleItem = (currentlySelected && !shouldBeSelected) || (!currentlySelected && shouldBeSelected);
 882        if (needToToggleItem && !formingToggleIndexRange) {
 883             toggleIndexRangeBegin = currIndex;
 884             formingToggleIndexRange = true;
 885        }
 886
 887        // NOTE: indexBelow actually walks up and down expanded trees for us.
 888        QModelIndex nextIndex = indexBelow(currIndex);
 889        allItemsInBoundDone = !nextIndex.isValid() || currIndexRect.top() > verticalCutoff;
 890
 891        const bool commitToggleIndexRange = formingToggleIndexRange &&
 892                                            (!needToToggleItem ||
 893                                             allItemsInBoundDone ||
 894                                             currIndex.parent() != toggleIndexRangeBegin.parent());
 895        if (commitToggleIndexRange) {
 896            formingToggleIndexRange = false;
 897             // If this is the last item in the bounds and it is also the beginning of a range,
 898             // don't toggle lastIndex - it will already have been dealt with.
 899            if (!allItemsInBoundDone || toggleIndexRangeBegin != currIndex) {
 900                itemsToToggle.select(toggleIndexRangeBegin, lastIndex);
 901            }
 902             // Need to start a new range immediately with currIndex?
 903            if (needToToggleItem) {
 904                toggleIndexRangeBegin = currIndex;
 905                formingToggleIndexRange = true;
 906            }
 907            if (allItemsInBoundDone && needToToggleItem) {
 908                 // Toggle the very last item in the bounds.
 909                itemsToToggle.select(currIndex, currIndex);
 910            }
 911        }
 912
 913        // next item
 914        lastIndex = currIndex;
 915        currIndex = nextIndex;
 916     } while (!allItemsInBoundDone);
 917
 918
 919     selectionModel()->select(itemsToToggle, QItemSelectionModel::Toggle);
 920
 921     m_band.lastSelectionOrigin = m_band.origin;
 922     m_band.lastSelectionDestination = m_band.destination;
 923     m_band.ignoreOldInfo = false;
 924 }
 925
 926 void DolphinDetailsView::setFoldersExpandable(bool expandable)
 927 {
 928     if (!expandable) {
 929         // collapse all expanded folders, as QTreeView::setItemsExpandable(false)
 930         // does not do this task
 931         const int rowCount = model()->rowCount();
 932         for (int row = 0; row < rowCount; ++row) {
 933             setExpanded(model()->index(row, 0), false);
 934         }
 935     }
 936     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 937     settings->setExpandableFolders(expandable);
 938     setRootIsDecorated(expandable);
 939     setItemsExpandable(expandable);
 940
 941     // The width of the space which is available for editing has changed
 942     // because of the (dis)appearance of the expanding toggles
 943     adjustMaximumSizeForEditing(currentIndex());
 944 }
 945
 946 void DolphinDetailsView::slotExpanded(const QModelIndex& index)
 947 {
 948     KFileItem item = m_dolphinViewController->itemForIndex(index);
 949     if (!item.isNull()) {
 950         m_expandedUrls.insert(item.url());
 951     }
 952 }
 953
 954 void DolphinDetailsView::slotCollapsed(const QModelIndex& index)
 955 {
 956     KFileItem item = m_dolphinViewController->itemForIndex(index);
 957     if (!item.isNull()) {
 958         m_expandedUrls.remove(item.url());
 959     }
 960 }
 961
 962 void DolphinDetailsView::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end)
 963 {
 964     removeExpandedIndexes(parent, start, end);
 965     QTreeView::rowsAboutToBeRemoved(parent, start, end);
 966 }
 967
 968 void DolphinDetailsView::removeExpandedIndexes(const QModelIndex& parent, int start, int end)
 969 {
 970     if (m_expandedUrls.isEmpty()) {
 971         return;
 972     }
 973
 974     for (int row = start; row <= end; row++) {
 975         const QModelIndex index = model()->index(row, 0, parent);
 976         if (isExpanded(index)) {
 977             slotCollapsed(index);
 978             removeExpandedIndexes(index, 0, model()->rowCount(index) - 1);
 979         }
 980     }
 981 }
 982
 983 void DolphinDetailsView::updateDecorationSize(bool showPreview)
 984 {
 985     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 986     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 987     setIconSize(QSize(iconSize, iconSize));
 988     m_decorationSize = QSize(iconSize, iconSize);
 989
 990     doItemsLayout();
 991 }
 992
 993 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 994 {
 995     return AdditionalInfoAccessor::instance().keyForColumn(columnIndex);
 996 }
 997
 998 void DolphinDetailsView::resizeColumns()
 999 {
1000     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
1001     // around 3 seconds for each (!) resize operation when having > 10000 items).
1002     // This gets a problem especially when opening large directories, where several
1003     // resize operations are received for showing the currently available items during
1004     // loading (the application hangs around 20 seconds when loading > 10000 items).
1005
1006     QHeaderView* headerView = header();
1007     QFontMetrics fontMetrics(viewport()->font());
1008
1009     // Calculate the required with for each column and store it in columnWidth[]
1010     int columnWidth[DolphinModel::ExtraColumnCount];
1011     const int defaultWidth = fontMetrics.width("xxxxxxxxxx");
1012
1013     for (int i = 0; i < DolphinModel::ExtraColumnCount; ++i) {
1014         const int logicalIndex = headerView->logicalIndex(i);
1015         const QString headline = model()->headerData(logicalIndex, Qt::Horizontal).toString();
1016         const int headlineWidth = fontMetrics.width(headline);
1017
1018         columnWidth[i] = qMax(defaultWidth, headlineWidth);
1019     }
1020
1021     const int defaultSizeWidth = fontMetrics.width("00000 Items");
1022     if (defaultSizeWidth > columnWidth[DolphinModel::Size]) {
1023         columnWidth[DolphinModel::Size] = defaultSizeWidth;
1024     }
1025
1026     const int defaultTimeWidth = fontMetrics.width("0000-00-00 00:00");
1027     if (defaultTimeWidth > columnWidth[DolphinModel::ModifiedTime]) {
1028         columnWidth[DolphinModel::ModifiedTime] = defaultTimeWidth;
1029     }
1030
1031     int requiredWidth = 0;
1032     for (int i = KDirModel::Size; i < DolphinModel::ExtraColumnCount; ++i) {
1033         if (!isColumnHidden(i)) {
1034             columnWidth[i] += 20; // provide a default gap
1035             requiredWidth += columnWidth[i];
1036             headerView->resizeSection(i, columnWidth[i]);
1037         }
1038     }
1039
1040     // Resize the name column in a way that the whole available width is used
1041     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
1042
1043     const int minNameWidth = 300;
1044     if (columnWidth[KDirModel::Name] < minNameWidth) {
1045         columnWidth[KDirModel::Name] = minNameWidth;
1046
1047         // It might be possible that the name column width can be
1048         // decreased without clipping any text. For performance
1049         // reasons the exact necessary width for full visible names is
1050         // only checked for up to 200 items:
1051         const int rowCount = model()->rowCount();
1052         if (rowCount > 0 && rowCount < 200) {
1053             const int nameWidth = sizeHintForColumn(DolphinModel::Name);
1054             if (nameWidth + requiredWidth <= viewport()->width()) {
1055                 columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
1056             } else if (nameWidth < minNameWidth) {
1057                 columnWidth[KDirModel::Name] = nameWidth;
1058             }
1059         }
1060     }
1061
1062     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
1063 }
1064
1065 bool DolphinDetailsView::isAboveExpandingToggle(const QPoint& pos) const
1066 {
1067     // QTreeView offers no public API to get the information whether an index has an
1068     // expanding toggle and what boundaries the toggle has. The following approach
1069     // also assumes a toggle for file items.
1070     if (itemsExpandable()) {
1071         const QModelIndex index = QTreeView::indexAt(pos);
1072         if (index.isValid() && (index.column() == KDirModel::Name)) {
1073             QRect rect = visualRect(index);
1074             const int toggleSize = rect.height();
1075             if (isRightToLeft()) {
1076                 rect.moveRight(rect.right());
1077             } else {
1078                 rect.moveLeft(rect.x() - toggleSize);
1079             }
1080             rect.setWidth(toggleSize);
1081
1082             QStyleOption opt;
1083             opt.initFrom(this);
1084             opt.rect = rect;
1085             rect = style()->subElementRect(QStyle::SE_TreeViewDisclosureItem, &opt, this);
1086
1087             return rect.contains(pos);
1088         }
1089     }
1090     return false;
1091 }
1092
1093 void DolphinDetailsView::adjustMaximumSizeForEditing(const QModelIndex& index)
1094 {
1095     // Make sure that the full width of the "Name" column is available for "Rename Inline"
1096     m_extensionsFactory->fileItemDelegate()->setMaximumSize(QTreeView::visualRect(index).size());
1097 }
1098
1099 DolphinDetailsView::ElasticBand::ElasticBand() :
1100     show(false),
1101     origin(),
1102     destination(),
1103     lastSelectionOrigin(),
1104     lastSelectionDestination(),
1105     ignoreOldInfo(true),
1106     outsideNearestLeftEdge(0),
1107     outsideNearestRightEdge(0),
1108     insideNearestLeftEdge(0),
1109     insideNearestRightEdge(0)
1110 {
1111 }
1112
1113 #include "dolphindetailsview.moc"