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 "dolphinsettings.h"
  27 #include "dolphinsortfilterproxymodel.h"
  28 #include "draganddrophelper.h"
  29 #include "selectionmanager.h"
  30 #include "viewproperties.h"
  31 #include "zoomlevelinfo.h"
  32
  33 #include "dolphin_detailsmodesettings.h"
  34 #include "dolphin_generalsettings.h"
  35
  36 #include <kdirmodel.h>
  37 #include <klocale.h>
  38 #include <kmenu.h>
  39
  40 #include <QAbstractProxyModel>
  41 #include <QAction>
  42 #include <QApplication>
  43 #include <QHeaderView>
  44 #include <QRubberBand>
  45 #include <QPainter>
  46 #include <QScrollBar>
  47
  48 DolphinDetailsView::DolphinDetailsView(QWidget* parent, DolphinController* controller) :
  49     QTreeView(parent),
  50         m_autoResize(true),
  51     m_expandingTogglePressed(false),
  52     m_keyPressed(false),
  53     m_useDefaultIndexAt(true),
  54     m_controller(controller),
  55     m_selectionManager(0),
  56     m_font(),
  57     m_decorationSize(),
  58     m_band(),
  59     m_ignoreScrollTo(false)
  60 {
  61     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  62     Q_ASSERT(settings != 0);
  63     Q_ASSERT(controller != 0);
  64
  65     setLayoutDirection(Qt::LeftToRight);
  66     setAcceptDrops(true);
  67     setSortingEnabled(true);
  68     setUniformRowHeights(true);
  69     setSelectionBehavior(SelectItems);
  70     setDragDropMode(QAbstractItemView::DragDrop);
  71     setDropIndicatorShown(false);
  72     setAlternatingRowColors(true);
  73     setRootIsDecorated(settings->expandableFolders());
  74     setItemsExpandable(settings->expandableFolders());
  75     setEditTriggers(QAbstractItemView::NoEditTriggers);
  76
  77     setMouseTracking(true);
  78
  79     const ViewProperties props(controller->url());
  80     setSortIndicatorSection(props.sorting());
  81     setSortIndicatorOrder(props.sortOrder());
  82
  83     QHeaderView* headerView = header();
  84     connect(headerView, SIGNAL(sectionClicked(int)),
  85             this, SLOT(synchronizeSortingState(int)));
  86     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  87     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  88             this, SLOT(configureColumns(const QPoint&)));
  89     connect(headerView, SIGNAL(sectionResized(int, int, int)),
  90             this, SLOT(slotHeaderSectionResized(int, int, int)));
  91     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
  92             this, SLOT(disableAutoResizing()));
  93
  94     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  95             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  96     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  97             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  98
  99     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
 100     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
 101     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
 102     // RETURN-key in keyPressEvent().
 103     if (KGlobalSettings::singleClick()) {
 104         connect(this, SIGNAL(clicked(const QModelIndex&)),
 105                 controller, SLOT(triggerItem(const QModelIndex&)));
 106     } else {
 107         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 108                 controller, SLOT(triggerItem(const QModelIndex&)));
 109     }
 110
 111     if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
 112         m_selectionManager = new SelectionManager(this);
 113         connect(m_selectionManager, SIGNAL(selectionChanged()),
 114                 this, SLOT(requestActivation()));
 115         connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
 116                 m_selectionManager, SLOT(reset()));
 117     }
 118
 119     connect(this, SIGNAL(entered(const QModelIndex&)),
 120             this, SLOT(slotEntered(const QModelIndex&)));
 121     connect(this, SIGNAL(viewportEntered()),
 122             controller, SLOT(emitViewportEntered()));
 123     connect(controller, SIGNAL(zoomLevelChanged(int)),
 124             this, SLOT(setZoomLevel(int)));
 125     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged()),
 126             this, SLOT(updateColumnVisibility()));
 127     connect(controller, 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                        settings->fontSize(),
 135                        settings->fontWeight(),
 136                        settings->italicFont());
 137     }
 138
 139     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 140     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 141
 142     const DolphinView* view = controller->dolphinView();
 143     connect(view, SIGNAL(showPreviewChanged()),
 144             this, SLOT(slotShowPreviewChanged()));
 145
 146     updateDecorationSize(view->showPreview());
 147
 148     setFocus();
 149     viewport()->installEventFilter(this);
 150
 151     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 152             this, SLOT(updateFont()));
 153
 154     m_useDefaultIndexAt = false;
 155 }
 156
 157 DolphinDetailsView::~DolphinDetailsView()
 158 {
 159 }
 160
 161 bool DolphinDetailsView::event(QEvent* event)
 162 {
 163     if (event->type() == QEvent::Polish) {
 164         QHeaderView* headerView = header();
 165         headerView->setResizeMode(QHeaderView::Interactive);
 166         headerView->setMovable(false);
 167
 168         updateColumnVisibility();
 169
 170         hideColumn(DolphinModel::Rating);
 171         hideColumn(DolphinModel::Tags);
 172     } else if (event->type() == QEvent::UpdateRequest) {
 173         // a wheel movement will scroll 4 items
 174         if (model()->rowCount() > 0) {
 175             verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
 176         }
 177     }
 178
 179     return QTreeView::event(event);
 180 }
 181
 182 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 183 {
 184     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 185     viewOptions.font = m_font;
 186     viewOptions.showDecorationSelected = true;
 187     viewOptions.decorationSize = m_decorationSize;
 188     return viewOptions;
 189 }
 190
 191 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 192 {
 193     QTreeView::contextMenuEvent(event);
 194     m_controller->triggerContextMenuRequest(event->pos());
 195 }
 196
 197 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 198 {
 199     m_controller->requestActivation();
 200
 201     const QModelIndex current = currentIndex();
 202     QTreeView::mousePressEvent(event);
 203
 204     m_expandingTogglePressed = false;
 205     const QModelIndex index = indexAt(event->pos());
 206     const bool updateState = index.isValid() &&
 207                              (index.column() == DolphinModel::Name) &&
 208                              (event->button() == Qt::LeftButton);
 209     if (updateState) {
 210         // TODO: See comment in DolphinIconsView::mousePressEvent(). Only update
 211         // the state if no expanding/collapsing area has been hit:
 212         const QRect rect = visualRect(index);
 213         if (event->pos().x() >= rect.x() + indentation()) {
 214             setState(QAbstractItemView::DraggingState);
 215         } else {
 216             m_expandingTogglePressed = true;
 217             kDebug() << "m_expandingTogglePressed " << m_expandingTogglePressed;
 218         }
 219     }
 220
 221     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 222         // the mouse press is done somewhere outside the filename column
 223         if (QApplication::mouseButtons() & Qt::MidButton) {
 224             m_controller->replaceUrlByClipboard();
 225         }
 226
 227         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 228         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 229             clearSelection();
 230         }
 231
 232         // restore the current index, other columns are handled as viewport area.
 233         // setCurrentIndex(...) implicitly calls scrollTo(...), which we want to ignore.
 234         m_ignoreScrollTo = true;
 235         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 236         m_ignoreScrollTo = false;
 237
 238         if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 239             // Inform Qt about what we are doing - otherwise it starts dragging items around!
 240             setState(DragSelectingState);
 241             m_band.show = true;
 242             // Incremental update data will not be useful - start from scratch.
 243             m_band.ignoreOldInfo = true;
 244             const QPoint pos = contentsPos();
 245             const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 246             m_band.origin = event->pos() + pos + scrollPos;
 247             m_band.destination = m_band.origin;
 248         }
 249     }
 250 }
 251
 252 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 253 {
 254     if (m_band.show) {
 255         const QPoint mousePos = event->pos();
 256         const QModelIndex index = indexAt(mousePos);
 257         if (!index.isValid()) {
 258             // the destination of the selection rectangle is above the viewport. In this
 259             // case QTreeView does no selection at all, which is not the wanted behavior
 260             // in Dolphin -> select all items within the elastic band rectangle
 261             updateElasticBandSelection();
 262         }
 263
 264         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 265         // as the Qt-issue #199631 has been fixed.
 266         // QTreeView::mouseMoveEvent(event);
 267         QAbstractItemView::mouseMoveEvent(event);
 268         updateElasticBand();
 269     } else {
 270         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 271         // as the Qt-issue #199631 has been fixed.
 272         // QTreeView::mouseMoveEvent(event);
 273         QAbstractItemView::mouseMoveEvent(event);
 274     }
 275
 276     if (m_expandingTogglePressed) {
 277         // Per default QTreeView starts either a selection or a drag operation when dragging
 278         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 279         // Turn off this behavior in Dolphin to stay predictable:
 280         clearSelection();
 281         setState(QAbstractItemView::NoState);
 282     }
 283 }
 284
 285 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 286 {
 287     const QModelIndex index = indexAt(event->pos());
 288     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 289         QTreeView::mouseReleaseEvent(event);
 290     } else {
 291         // don't change the current index if the cursor is released
 292         // above any other column than the name column, as the other
 293         // columns act as viewport
 294         const QModelIndex current = currentIndex();
 295         QTreeView::mouseReleaseEvent(event);
 296         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 297     }
 298
 299     m_expandingTogglePressed = false;
 300     if (m_band.show) {
 301         setState(NoState);
 302         updateElasticBand();
 303         m_band.show = false;
 304     }
 305 }
 306
 307 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 308 {
 309     DragAndDropHelper::startDrag(this, supportedActions, m_controller);
 310     m_band.show = false;
 311 }
 312
 313 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 314 {
 315     if (DragAndDropHelper::isMimeDataSupported(event->mimeData())) {
 316         event->acceptProposedAction();
 317     }
 318
 319     if (m_band.show) {
 320         updateElasticBand();
 321         m_band.show = false;
 322     }
 323 }
 324
 325 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 326 {
 327     QTreeView::dragLeaveEvent(event);
 328     setDirtyRegion(m_dropRect);
 329 }
 330
 331 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 332 {
 333     QTreeView::dragMoveEvent(event);
 334
 335     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 336     setDirtyRegion(m_dropRect);
 337     const QModelIndex index = indexAt(event->pos());
 338     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 339         const KFileItem item = m_controller->itemForIndex(index);
 340         if (!item.isNull() && item.isDir()) {
 341             m_dropRect = visualRect(index);
 342         } else {
 343             m_dropRect.setSize(QSize()); // set as invalid
 344         }
 345         setDirtyRegion(m_dropRect);
 346     }
 347
 348     if (DragAndDropHelper::isMimeDataSupported(event->mimeData())) {
 349         // accept url drops, independently from the destination item
 350         event->acceptProposedAction();
 351     }
 352 }
 353
 354 void DolphinDetailsView::dropEvent(QDropEvent* event)
 355 {
 356     const QModelIndex index = indexAt(event->pos());
 357     KFileItem item;
 358     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 359         item = m_controller->itemForIndex(index);
 360     }
 361     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 362     QTreeView::dropEvent(event);
 363 }
 364
 365 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 366 {
 367     QTreeView::paintEvent(event);
 368     if (m_band.show) {
 369         // The following code has been taken from QListView
 370         // and adapted to DolphinDetailsView.
 371         // (C) 1992-2007 Trolltech ASA
 372         QStyleOptionRubberBand opt;
 373         opt.initFrom(this);
 374         opt.shape = QRubberBand::Rectangle;
 375         opt.opaque = false;
 376         opt.rect = elasticBandRect();
 377
 378         QPainter painter(viewport());
 379         painter.save();
 380         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 381         painter.restore();
 382     }
 383 }
 384
 385 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 386 {
 387     // If the Control modifier is pressed, a multiple selection
 388     // is done and DolphinDetailsView::currentChanged() may not
 389     // not change the selection in a custom way.
 390     m_keyPressed = !(event->modifiers() & Qt::ControlModifier);
 391
 392     QTreeView::keyPressEvent(event);
 393     m_controller->handleKeyPressEvent(event);
 394 }
 395
 396 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 397 {
 398     QTreeView::keyReleaseEvent(event);
 399     m_keyPressed = false;
 400 }
 401
 402 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 403 {
 404     if (m_autoResize) {
 405         resizeColumns();
 406     }
 407     QTreeView::resizeEvent(event);
 408 }
 409
 410 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 411 {
 412     if (m_selectionManager != 0) {
 413         m_selectionManager->reset();
 414     }
 415
 416     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 417     if (event->modifiers() & Qt::ControlModifier) {
 418         event->ignore();
 419         return;
 420     }
 421
 422     QTreeView::wheelEvent(event);
 423 }
 424
 425 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 426 {
 427     QTreeView::currentChanged(current, previous);
 428
 429     // Stay consistent with QListView: When changing the current index by key presses,
 430     // also change the selection.
 431     if (m_keyPressed) {
 432         selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 433     }
 434 }
 435
 436 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 437 {
 438     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 439         // if the mouse is above an item and moved very fast outside the widget,
 440         // no viewportEntered() signal might be emitted although the mouse has been moved
 441         // above the viewport
 442         m_controller->emitViewportEntered();
 443     }
 444
 445     return QTreeView::eventFilter(watched, event);
 446 }
 447
 448 QModelIndex DolphinDetailsView::indexAt(const QPoint& point) const
 449 {
 450     // the blank portion of the name column counts as empty space
 451     const QModelIndex index = QTreeView::indexAt(point);
 452     const bool isAboveEmptySpace  = !m_useDefaultIndexAt &&
 453                                     (index.column() == KDirModel::Name) && !nameColumnRect(index).contains(point);
 454     return isAboveEmptySpace ? QModelIndex() : index;
 455 }
 456
 457 void DolphinDetailsView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command)
 458 {
 459     // We must override setSelection() as Qt calls it internally and when this happens
 460     // we must ensure that the default indexAt() is used.
 461     if (!m_band.show) {
 462         m_useDefaultIndexAt = true;
 463         QTreeView::setSelection(rect, command);
 464         m_useDefaultIndexAt = false;
 465     } else {
 466
 467         // Use our own elastic band selection algorithm
 468         updateElasticBandSelection();
 469     }
 470 }
 471
 472 void DolphinDetailsView::scrollTo(const QModelIndex & index, ScrollHint hint)
 473 {
 474     if (m_ignoreScrollTo)
 475         return;
 476     QTreeView::scrollTo(index, hint);
 477 }
 478
 479 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 480 {
 481     QHeaderView* headerView = header();
 482     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 483 }
 484
 485 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 486 {
 487     QHeaderView* headerView = header();
 488     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 489 }
 490
 491 void DolphinDetailsView::synchronizeSortingState(int column)
 492 {
 493     // The sorting has already been changed in QTreeView if this slot is
 494     // invoked, but Dolphin is not informed about this.
 495     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 496     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 497     m_controller->indicateSortingChange(sorting);
 498     m_controller->indicateSortOrderChange(sortOrder);
 499 }
 500
 501 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 502 {
 503     if (index.column() == DolphinModel::Name) {
 504         m_controller->emitItemEntered(index);
 505     } else {
 506         m_controller->emitViewportEntered();
 507     }
 508 }
 509
 510 void DolphinDetailsView::updateElasticBand()
 511 {
 512     if (m_band.show) {
 513         QRect dirtyRegion(elasticBandRect());
 514         const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 515         m_band.destination = viewport()->mapFromGlobal(QCursor::pos()) + scrollPos;
 516         dirtyRegion = dirtyRegion.united(elasticBandRect());
 517         setDirtyRegion(dirtyRegion);
 518     }
 519 }
 520
 521 QRect DolphinDetailsView::elasticBandRect() const
 522 {
 523     const QPoint pos(contentsPos());
 524     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 525
 526     const QPoint topLeft = m_band.origin - pos - scrollPos;
 527     const QPoint bottomRight = m_band.destination - pos - scrollPos;
 528     return QRect(topLeft, bottomRight).normalized();
 529 }
 530
 531 void DolphinDetailsView::setZoomLevel(int level)
 532 {
 533     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 534     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 535
 536     const bool showPreview = m_controller->dolphinView()->showPreview();
 537     if (showPreview) {
 538         settings->setPreviewSize(size);
 539     } else {
 540         settings->setIconSize(size);
 541     }
 542
 543     updateDecorationSize(showPreview);
 544 }
 545
 546
 547 void DolphinDetailsView::slotShowPreviewChanged()
 548 {
 549     const DolphinView* view = m_controller->dolphinView();
 550     updateDecorationSize(view->showPreview());
 551 }
 552
 553 void DolphinDetailsView::configureColumns(const QPoint& pos)
 554 {
 555     KMenu popup(this);
 556     popup.addTitle(i18nc("@title:menu", "Columns"));
 557
 558     QHeaderView* headerView = header();
 559     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 560         const int logicalIndex = headerView->logicalIndex(i);
 561         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 562         QAction* action = popup.addAction(text);
 563         action->setCheckable(true);
 564         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 565         action->setData(i);
 566     }
 567
 568     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 569     if (activatedAction != 0) {
 570         const bool show = activatedAction->isChecked();
 571         const int columnIndex = activatedAction->data().toInt();
 572
 573         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 574         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 575         if (show) {
 576             Q_ASSERT(!list.contains(info));
 577             list.append(info);
 578         } else {
 579             Q_ASSERT(list.contains(info));
 580             const int index = list.indexOf(info);
 581             list.removeAt(index);
 582         }
 583
 584         m_controller->indicateAdditionalInfoChange(list);
 585         setColumnHidden(columnIndex, !show);
 586     }
 587 }
 588
 589 void DolphinDetailsView::updateColumnVisibility()
 590 {
 591     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 592     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 593         const KFileItemDelegate::Information info = infoForColumn(i);
 594         const bool hide = !list.contains(info);
 595         if (isColumnHidden(i) != hide) {
 596             setColumnHidden(i, hide);
 597         }
 598     }
 599
 600     resizeColumns();
 601 }
 602
 603 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 604 {
 605     Q_UNUSED(logicalIndex);
 606     Q_UNUSED(oldSize);
 607     Q_UNUSED(newSize);
 608     if (QApplication::mouseButtons() & Qt::LeftButton) {
 609         disableAutoResizing();
 610     }
 611 }
 612
 613 void DolphinDetailsView::slotActivationChanged(bool active)
 614 {
 615     setAlternatingRowColors(active);
 616 }
 617
 618 void DolphinDetailsView::disableAutoResizing()
 619 {
 620     m_autoResize = false;
 621 }
 622
 623 void DolphinDetailsView::requestActivation()
 624 {
 625     m_controller->requestActivation();
 626 }
 627
 628 void DolphinDetailsView::updateFont()
 629 {
 630     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 631     Q_ASSERT(settings != 0);
 632
 633     if (settings->useSystemFont()) {
 634         m_font = KGlobalSettings::generalFont();
 635     }
 636 }
 637
 638 void DolphinDetailsView::updateElasticBandSelection()
 639 {
 640     if (!m_band.show) {
 641         return;
 642     }
 643
 644     // Ensure the elastic band itself is up-to-date, in
 645     // case we are being called due to e.g. a drag event.
 646     updateElasticBand();
 647
 648     // Clip horizontally to the name column, as some filenames will be
 649     // longer than the column.  We don't clip vertically as origin
 650     // may be above or below the current viewport area.
 651     const int nameColumnX = header()->sectionPosition(DolphinModel::Name);
 652     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 653     QRect selRect = elasticBandRect().normalized();
 654     QRect nameColumnRect(nameColumnX, selRect.y(), nameColumnWidth, selRect.height());
 655     selRect = nameColumnRect.intersect(selRect).normalized();
 656
 657     if (selRect.isNull()) {
 658         clearSelection();
 659         m_band.ignoreOldInfo = true;
 660         return;
 661     }
 662
 663     if (!m_band.ignoreOldInfo) {
 664         // Do some quick checks to see if we can rule out the need to
 665         // update the selection.
 666         Q_ASSERT(uniformRowHeights());
 667         QModelIndex dummyIndex = model()->index(0, 0);
 668         if (!dummyIndex.isValid()) {
 669             // No items in the model presumably.
 670             return;
 671         }
 672
 673         // If the elastic band does not cover the same rows as before, we'll
 674         // need to re-check, and also invalidate the old item distances.
 675         const int rowHeight = QTreeView::rowHeight(dummyIndex);
 676         const bool coveringSameRows =
 677             (selRect.top()    / rowHeight == m_band.oldSelectionRect.top()    / rowHeight) &&
 678             (selRect.bottom() / rowHeight == m_band.oldSelectionRect.bottom() / rowHeight);
 679         if (coveringSameRows) {
 680             // Covering the same rows, but have we moved far enough horizontally
 681             // that we might have (de)selected some other items?
 682             const QRect oldSelRect = m_band.oldSelectionRect;
 683             const bool itemSelectionChanged =
 684                 ((selRect.left() > oldSelRect.left()) &&
 685                  (selRect.left() > m_band.insideNearestLeftEdge)) ||
 686                 ((selRect.left() < oldSelRect.left()) &&
 687                  (selRect.left() <= m_band.outsideNearestLeftEdge)) ||
 688                 ((selRect.right() < oldSelRect.right()) &&
 689                  (selRect.left() >= m_band.insideNearestRightEdge)) ||
 690                 ((selRect.right() > oldSelRect.right()) &&
 691                  (selRect.right() >= m_band.outsideNearestRightEdge));
 692
 693             if (!itemSelectionChanged) {
 694                 return;
 695             }
 696         }
 697     }
 698
 699     // Do the selection from scratch. Force a update of the horizontal distances info.
 700     m_band.insideNearestLeftEdge   = nameColumnX + nameColumnWidth + 1;
 701     m_band.insideNearestRightEdge  = nameColumnX - 1;
 702     m_band.outsideNearestLeftEdge  = nameColumnX - 1;
 703     m_band.outsideNearestRightEdge = nameColumnX + nameColumnWidth + 1;
 704
 705     // Include the old selection rect as well, so we can deselect
 706     // items that were inside it but not in the new selRect.
 707     const QRect boundingRect = selRect.united(m_band.oldSelectionRect).normalized();
 708     if (boundingRect.isNull()) {
 709         return;
 710     }
 711
 712     // Get the index of the item in this row in the name column.
 713     // TODO - would this still work if the columns could be re-ordered?
 714     QModelIndex startIndex = QTreeView::indexAt(boundingRect.topLeft());
 715     if (startIndex.parent().isValid()) {
 716         startIndex = startIndex.parent().child(startIndex.row(), KDirModel::Name);
 717     } else {
 718         startIndex = model()->index(startIndex.row(), KDirModel::Name);
 719     }
 720
 721    // Go through all indexes between the top and bottom of boundingRect, and
 722    // update the selection.
 723    const int verticalCutoff = boundingRect.bottom();
 724    QModelIndex currIndex = startIndex;
 725    QModelIndex lastIndex;
 726    bool allItemsInBoundDone = false;
 727
 728    // Calling selectionModel()->select(...) for each item that needs to be
 729    // toggled is slow as each call emits selectionChanged(...) so store them
 730    // and do the selection toggle in one batch.
 731    QItemSelection itemsToToggle;
 732    // QItemSelection's deal with continuous ranges of indexes better than
 733    // single indexes, so try to portion items that need to be toggled into ranges.
 734    bool formingToggleIndexRange = false;
 735    QModelIndex toggleIndexRangeBegin = QModelIndex();
 736
 737    do {
 738        QRect currIndexRect = visualRect(currIndex);
 739        const QString name = m_controller->itemForIndex(currIndex).name();
 740        currIndexRect.setWidth(DolphinFileItemDelegate::nameColumnWidth(name, viewOptions()));
 741
 742         // Update some optimisation info as we go.
 743        const int cr = currIndexRect.right();
 744        const int cl = currIndexRect.left();
 745        const int sl = selRect.left();
 746        const int sr = selRect.right();
 747        // "The right edge of the name is outside of the rect but nearer than m_outsideNearestLeft", etc
 748        if ((cr < sl && cr > m_band.outsideNearestLeftEdge)) {
 749            m_band.outsideNearestLeftEdge = cr;
 750        }
 751        if ((cl > sr && cl < m_band.outsideNearestRightEdge)) {
 752            m_band.outsideNearestRightEdge = cl;
 753        }
 754        if ((cl >= sl && cl <= sr && cl > m_band.insideNearestRightEdge)) {
 755            m_band.insideNearestRightEdge = cl;
 756        }
 757        if ((cr >= sl && cr <= sr && cr < m_band.insideNearestLeftEdge)) {
 758            m_band.insideNearestLeftEdge = cr;
 759        }
 760
 761        bool currentlySelected = selectionModel()->isSelected(currIndex);
 762        bool intersectsSelectedRect = currIndexRect.intersects(selRect);
 763        bool needToToggleItem = (currentlySelected && !intersectsSelectedRect) || (!currentlySelected && intersectsSelectedRect);
 764        if (needToToggleItem && !formingToggleIndexRange) {
 765             toggleIndexRangeBegin = currIndex;
 766             formingToggleIndexRange = true;
 767        }
 768
 769        // NOTE: indexBelow actually walks up and down expanded trees for us.
 770        QModelIndex nextIndex = indexBelow(currIndex);
 771        allItemsInBoundDone = !nextIndex.isValid() || currIndexRect.top() > verticalCutoff;
 772
 773        const bool commitToggleIndexRange = formingToggleIndexRange &&
 774                                            (!needToToggleItem ||
 775                                             allItemsInBoundDone ||
 776                                             currIndex.parent() != toggleIndexRangeBegin.parent());
 777        if (commitToggleIndexRange) {
 778            itemsToToggle.select(toggleIndexRangeBegin, lastIndex );
 779            // Immediately start a new range with currIndex?
 780            if (needToToggleItem) {
 781                toggleIndexRangeBegin = currIndex;
 782            }
 783            formingToggleIndexRange = needToToggleItem;
 784        }
 785
 786        // next item
 787        lastIndex = currIndex;
 788        currIndex = nextIndex;
 789     } while (!allItemsInBoundDone);
 790
 791     selectionModel()->select(itemsToToggle, QItemSelectionModel::Toggle);
 792
 793     m_band.oldSelectionRect = selRect;
 794     m_band.ignoreOldInfo = false;
 795 }
 796
 797 void DolphinDetailsView::updateDecorationSize(bool showPreview)
 798 {
 799     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 800     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 801     setIconSize(QSize(iconSize, iconSize));
 802     m_decorationSize = QSize(iconSize, iconSize);
 803
 804     if (m_selectionManager != 0) {
 805         m_selectionManager->reset();
 806     }
 807
 808     doItemsLayout();
 809 }
 810
 811 QPoint DolphinDetailsView::contentsPos() const
 812 {
 813     // implementation note: the horizonal position is ignored currently, as no
 814     // horizontal scrolling is done anyway during a selection
 815     const QScrollBar* scrollbar = verticalScrollBar();
 816     Q_ASSERT(scrollbar != 0);
 817
 818     const int maxHeight = maximumViewportSize().height();
 819     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 820     const int visibleHeight = model()->rowCount() + 1 - height;
 821     if (visibleHeight <= 0) {
 822         return QPoint(0, 0);
 823     }
 824
 825     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 826     return QPoint(0, y);
 827 }
 828
 829 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 830 {
 831     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 832
 833     switch (columnIndex) {
 834     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 835     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 836     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 837     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 838     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 839     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 840     default: break;
 841     }
 842
 843     return info;
 844 }
 845
 846 void DolphinDetailsView::resizeColumns()
 847 {
 848     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 849     // around 3 seconds for each (!) resize operation when having > 10000 items).
 850     // This gets a problem especially when opening large directories, where several
 851     // resize operations are received for showing the currently available items during
 852     // loading (the application hangs around 20 seconds when loading > 10000 items).
 853
 854     QHeaderView* headerView = header();
 855     QFontMetrics fontMetrics(viewport()->font());
 856
 857     int columnWidth[KDirModel::ColumnCount];
 858     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 859     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 860     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 861     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 862     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 863     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 864
 865     int requiredWidth = 0;
 866     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 867         if (!isColumnHidden(i)) {
 868             columnWidth[i] += 20; // provide a default gap
 869             requiredWidth += columnWidth[i];
 870             headerView->resizeSection(i, columnWidth[i]);
 871         }
 872     }
 873
 874     // resize the name column in a way that the whole available width is used
 875     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 876     if (columnWidth[KDirModel::Name] < 120) {
 877         columnWidth[KDirModel::Name] = 120;
 878     }
 879     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 880 }
 881
 882 QRect DolphinDetailsView::nameColumnRect(const QModelIndex& index) const
 883 {
 884     QRect rect = visualRect(index);
 885     const KFileItem item = m_controller->itemForIndex(index);
 886     if (!item.isNull()) {
 887         const int width = DolphinFileItemDelegate::nameColumnWidth(item.name(), viewOptions());
 888         rect.setWidth(width);
 889     }
 890
 891     return rect;
 892 }
 893
 894 DolphinDetailsView::ElasticBand::ElasticBand() :
 895     show(false),
 896     origin(),
 897     destination(),
 898     oldSelectionRect(),
 899     ignoreOldInfo(true),
 900     outsideNearestLeftEdge(0),
 901     outsideNearestRightEdge(0),
 902     insideNearestLeftEdge(0),
 903     insideNearestRightEdge(0)
 904 {
 905 }
 906
 907 #include "dolphindetailsview.moc"