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 {
  60     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  61     Q_ASSERT(settings != 0);
  62     Q_ASSERT(controller != 0);
  63
  64     setLayoutDirection(Qt::LeftToRight);
  65     setAcceptDrops(true);
  66     setSortingEnabled(true);
  67     setUniformRowHeights(true);
  68     setSelectionBehavior(SelectItems);
  69     setDragDropMode(QAbstractItemView::DragDrop);
  70     setDropIndicatorShown(false);
  71     setAlternatingRowColors(true);
  72     setRootIsDecorated(settings->expandableFolders());
  73     setItemsExpandable(settings->expandableFolders());
  74     setEditTriggers(QAbstractItemView::NoEditTriggers);
  75
  76     setMouseTracking(true);
  77
  78     const ViewProperties props(controller->url());
  79     setSortIndicatorSection(props.sorting());
  80     setSortIndicatorOrder(props.sortOrder());
  81
  82     QHeaderView* headerView = header();
  83     connect(headerView, SIGNAL(sectionClicked(int)),
  84             this, SLOT(synchronizeSortingState(int)));
  85     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  86     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  87             this, SLOT(configureColumns(const QPoint&)));
  88     connect(headerView, SIGNAL(sectionResized(int, int, int)),
  89             this, SLOT(slotHeaderSectionResized(int, int, int)));
  90     connect(headerView, SIGNAL(sectionHandleDoubleClicked(int)),
  91             this, SLOT(disableAutoResizing()));
  92
  93     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  94             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  95     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  96             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  97
  98     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  99     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
 100     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
 101     // RETURN-key in keyPressEvent().
 102     if (KGlobalSettings::singleClick()) {
 103         connect(this, SIGNAL(clicked(const QModelIndex&)),
 104                 controller, SLOT(triggerItem(const QModelIndex&)));
 105     } else {
 106         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 107                 controller, SLOT(triggerItem(const QModelIndex&)));
 108     }
 109
 110     if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
 111         m_selectionManager = new SelectionManager(this);
 112         connect(m_selectionManager, SIGNAL(selectionChanged()),
 113                 this, SLOT(requestActivation()));
 114         connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
 115                 m_selectionManager, SLOT(reset()));
 116     }
 117
 118     connect(this, SIGNAL(entered(const QModelIndex&)),
 119             this, SLOT(slotEntered(const QModelIndex&)));
 120     connect(this, SIGNAL(viewportEntered()),
 121             controller, SLOT(emitViewportEntered()));
 122     connect(controller, SIGNAL(zoomLevelChanged(int)),
 123             this, SLOT(setZoomLevel(int)));
 124     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged()),
 125             this, SLOT(updateColumnVisibility()));
 126     connect(controller, SIGNAL(activationChanged(bool)),
 127             this, SLOT(slotActivationChanged(bool)));
 128
 129     if (settings->useSystemFont()) {
 130         m_font = KGlobalSettings::generalFont();
 131     } else {
 132         m_font = QFont(settings->fontFamily(),
 133                        settings->fontSize(),
 134                        settings->fontWeight(),
 135                        settings->italicFont());
 136     }
 137
 138     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 139     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 140
 141     const DolphinView* view = controller->dolphinView();
 142     connect(view, SIGNAL(showPreviewChanged()),
 143             this, SLOT(slotShowPreviewChanged()));
 144
 145     updateDecorationSize(view->showPreview());
 146
 147     setFocus();
 148     viewport()->installEventFilter(this);
 149
 150     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 151             this, SLOT(updateFont()));
 152
 153     m_useDefaultIndexAt = false;
 154 }
 155
 156 DolphinDetailsView::~DolphinDetailsView()
 157 {
 158 }
 159
 160 bool DolphinDetailsView::event(QEvent* event)
 161 {
 162     if (event->type() == QEvent::Polish) {
 163         QHeaderView* headerView = header();
 164         headerView->setResizeMode(QHeaderView::Interactive);
 165         headerView->setMovable(false);
 166
 167         updateColumnVisibility();
 168
 169         hideColumn(DolphinModel::Rating);
 170         hideColumn(DolphinModel::Tags);
 171     } else if (event->type() == QEvent::UpdateRequest) {
 172         // a wheel movement will scroll 4 items
 173         if (model()->rowCount() > 0) {
 174             verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
 175         }
 176     }
 177
 178     return QTreeView::event(event);
 179 }
 180
 181 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 182 {
 183     QStyleOptionViewItem viewOptions = QTreeView::viewOptions();
 184     viewOptions.font = m_font;
 185     viewOptions.showDecorationSelected = true;
 186     viewOptions.decorationSize = m_decorationSize;
 187     return viewOptions;
 188 }
 189
 190 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 191 {
 192     QTreeView::contextMenuEvent(event);
 193     m_controller->triggerContextMenuRequest(event->pos());
 194 }
 195
 196 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 197 {
 198     m_controller->requestActivation();
 199
 200     const QModelIndex current = currentIndex();
 201     QTreeView::mousePressEvent(event);
 202
 203     m_expandingTogglePressed = false;
 204     const QModelIndex index = indexAt(event->pos());
 205     const bool updateState = index.isValid() &&
 206                              (index.column() == DolphinModel::Name) &&
 207                              (event->button() == Qt::LeftButton);
 208     if (updateState) {
 209         // TODO: See comment in DolphinIconsView::mousePressEvent(). Only update
 210         // the state if no expanding/collapsing area has been hit:
 211         const QRect rect = visualRect(index);
 212         if (event->pos().x() >= rect.x() + indentation()) {
 213             setState(QAbstractItemView::DraggingState);
 214         } else {
 215             m_expandingTogglePressed = true;
 216             kDebug() << "m_expandingTogglePressed " << m_expandingTogglePressed;
 217         }
 218     }
 219
 220     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 221         // the mouse press is done somewhere outside the filename column
 222         if (QApplication::mouseButtons() & Qt::MidButton) {
 223             m_controller->replaceUrlByClipboard();
 224         }
 225
 226         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 227         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 228             clearSelection();
 229         }
 230
 231         // restore the current index, other columns are handled as viewport area
 232         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 233
 234
 235         if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) {
 236             // Inform Qt about what we are doing - otherwise it starts dragging items around!
 237             setState(DragSelectingState);
 238             m_band.show = true;
 239             // Incremental update data will not be useful - start from scratch.
 240             m_band.ignoreOldInfo = true;
 241             const QPoint pos = contentsPos();
 242             const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 243             m_band.origin = event->pos() + pos + scrollPos;
 244             m_band.destination = m_band.origin;
 245         }
 246     }
 247 }
 248
 249 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 250 {
 251     if (m_band.show) {
 252         const QPoint mousePos = event->pos();
 253         const QModelIndex index = indexAt(mousePos);
 254         if (!index.isValid()) {
 255             // the destination of the selection rectangle is above the viewport. In this
 256             // case QTreeView does no selection at all, which is not the wanted behavior
 257             // in Dolphin -> select all items within the elastic band rectangle
 258             updateElasticBandSelection();
 259         }
 260
 261         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 262         // as the Qt-issue #199631 has been fixed.
 263         // QTreeView::mouseMoveEvent(event);
 264         QAbstractItemView::mouseMoveEvent(event);
 265         updateElasticBand();
 266     } else {
 267         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 268         // as the Qt-issue #199631 has been fixed.
 269         // QTreeView::mouseMoveEvent(event);
 270         QAbstractItemView::mouseMoveEvent(event);
 271     }
 272
 273     if (m_expandingTogglePressed) {
 274         // Per default QTreeView starts either a selection or a drag operation when dragging
 275         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 276         // Turn off this behavior in Dolphin to stay predictable:
 277         clearSelection();
 278         setState(QAbstractItemView::NoState);
 279     }
 280 }
 281
 282 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 283 {
 284     const QModelIndex index = indexAt(event->pos());
 285     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 286         QTreeView::mouseReleaseEvent(event);
 287     } else {
 288         // don't change the current index if the cursor is released
 289         // above any other column than the name column, as the other
 290         // columns act as viewport
 291         const QModelIndex current = currentIndex();
 292         QTreeView::mouseReleaseEvent(event);
 293         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 294     }
 295
 296     m_expandingTogglePressed = false;
 297     if (m_band.show) {
 298         setState(NoState);
 299         updateElasticBand();
 300         m_band.show = false;
 301     }
 302 }
 303
 304 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 305 {
 306     DragAndDropHelper::startDrag(this, supportedActions, m_controller);
 307     m_band.show = false;
 308 }
 309
 310 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 311 {
 312     if (DragAndDropHelper::isMimeDataSupported(event->mimeData())) {
 313         event->acceptProposedAction();
 314     }
 315
 316     if (m_band.show) {
 317         updateElasticBand();
 318         m_band.show = false;
 319     }
 320 }
 321
 322 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 323 {
 324     QTreeView::dragLeaveEvent(event);
 325     setDirtyRegion(m_dropRect);
 326 }
 327
 328 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 329 {
 330     QTreeView::dragMoveEvent(event);
 331
 332     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 333     setDirtyRegion(m_dropRect);
 334     const QModelIndex index = indexAt(event->pos());
 335     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 336         const KFileItem item = m_controller->itemForIndex(index);
 337         if (!item.isNull() && item.isDir()) {
 338             m_dropRect = visualRect(index);
 339         } else {
 340             m_dropRect.setSize(QSize()); // set as invalid
 341         }
 342         setDirtyRegion(m_dropRect);
 343     }
 344
 345     if (DragAndDropHelper::isMimeDataSupported(event->mimeData())) {
 346         // accept url drops, independently from the destination item
 347         event->acceptProposedAction();
 348     }
 349 }
 350
 351 void DolphinDetailsView::dropEvent(QDropEvent* event)
 352 {
 353     const QModelIndex index = indexAt(event->pos());
 354     KFileItem item;
 355     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 356         item = m_controller->itemForIndex(index);
 357     }
 358     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 359     QTreeView::dropEvent(event);
 360 }
 361
 362 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 363 {
 364     QTreeView::paintEvent(event);
 365     if (m_band.show) {
 366         // The following code has been taken from QListView
 367         // and adapted to DolphinDetailsView.
 368         // (C) 1992-2007 Trolltech ASA
 369         QStyleOptionRubberBand opt;
 370         opt.initFrom(this);
 371         opt.shape = QRubberBand::Rectangle;
 372         opt.opaque = false;
 373         opt.rect = elasticBandRect();
 374
 375         QPainter painter(viewport());
 376         painter.save();
 377         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 378         painter.restore();
 379     }
 380 }
 381
 382 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 383 {
 384     // If the Control modifier is pressed, a multiple selection
 385     // is done and DolphinDetailsView::currentChanged() may not
 386     // not change the selection in a custom way.
 387     m_keyPressed = !(event->modifiers() & Qt::ControlModifier);
 388
 389     QTreeView::keyPressEvent(event);
 390     m_controller->handleKeyPressEvent(event);
 391 }
 392
 393 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 394 {
 395     QTreeView::keyReleaseEvent(event);
 396     m_keyPressed = false;
 397 }
 398
 399 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 400 {
 401     if (m_autoResize) {
 402         resizeColumns();
 403     }
 404     QTreeView::resizeEvent(event);
 405 }
 406
 407 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 408 {
 409     if (m_selectionManager != 0) {
 410         m_selectionManager->reset();
 411     }
 412
 413     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 414     if (event->modifiers() & Qt::ControlModifier) {
 415         event->ignore();
 416         return;
 417     }
 418
 419     QTreeView::wheelEvent(event);
 420 }
 421
 422 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 423 {
 424     QTreeView::currentChanged(current, previous);
 425
 426     // Stay consistent with QListView: When changing the current index by key presses,
 427     // also change the selection.
 428     if (m_keyPressed) {
 429         selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 430     }
 431 }
 432
 433 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 434 {
 435     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 436         // if the mouse is above an item and moved very fast outside the widget,
 437         // no viewportEntered() signal might be emitted although the mouse has been moved
 438         // above the viewport
 439         m_controller->emitViewportEntered();
 440     }
 441
 442     return QTreeView::eventFilter(watched, event);
 443 }
 444
 445 QModelIndex DolphinDetailsView::indexAt(const QPoint& point) const
 446 {
 447     // the blank portion of the name column counts as empty space
 448     const QModelIndex index = QTreeView::indexAt(point);
 449     const bool isAboveEmptySpace  = !m_useDefaultIndexAt &&
 450                                     (index.column() == KDirModel::Name) && !nameColumnRect(index).contains(point);
 451     return isAboveEmptySpace ? QModelIndex() : index;
 452 }
 453
 454 void DolphinDetailsView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command)
 455 {
 456     // We must override setSelection() as Qt calls it internally and when this happens
 457     // we must ensure that the default indexAt() is used.
 458     if (!m_band.show) {
 459         m_useDefaultIndexAt = true;
 460         QTreeView::setSelection(rect, command);
 461         m_useDefaultIndexAt = false;
 462     } else {
 463
 464         // Use our own elastic band selection algorithm
 465         updateElasticBandSelection();
 466     }
 467 }
 468
 469 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 470 {
 471     QHeaderView* headerView = header();
 472     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 473 }
 474
 475 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 476 {
 477     QHeaderView* headerView = header();
 478     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 479 }
 480
 481 void DolphinDetailsView::synchronizeSortingState(int column)
 482 {
 483     // The sorting has already been changed in QTreeView if this slot is
 484     // invoked, but Dolphin is not informed about this.
 485     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 486     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 487     m_controller->indicateSortingChange(sorting);
 488     m_controller->indicateSortOrderChange(sortOrder);
 489 }
 490
 491 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 492 {
 493     if (index.column() == DolphinModel::Name) {
 494         m_controller->emitItemEntered(index);
 495     } else {
 496         m_controller->emitViewportEntered();
 497     }
 498 }
 499
 500 void DolphinDetailsView::updateElasticBand()
 501 {
 502     if (m_band.show) {
 503         QRect dirtyRegion(elasticBandRect());
 504         const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 505         m_band.destination = viewport()->mapFromGlobal(QCursor::pos()) + scrollPos;
 506         dirtyRegion = dirtyRegion.united(elasticBandRect());
 507         setDirtyRegion(dirtyRegion);
 508     }
 509 }
 510
 511 QRect DolphinDetailsView::elasticBandRect() const
 512 {
 513     const QPoint pos(contentsPos());
 514     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 515
 516     const QPoint topLeft = m_band.origin - pos - scrollPos;
 517     const QPoint bottomRight = m_band.destination - pos - scrollPos;
 518     return QRect(topLeft, bottomRight).normalized();
 519 }
 520
 521 void DolphinDetailsView::setZoomLevel(int level)
 522 {
 523     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 524     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 525
 526     const bool showPreview = m_controller->dolphinView()->showPreview();
 527     if (showPreview) {
 528         settings->setPreviewSize(size);
 529     } else {
 530         settings->setIconSize(size);
 531     }
 532
 533     updateDecorationSize(showPreview);
 534 }
 535
 536
 537 void DolphinDetailsView::slotShowPreviewChanged()
 538 {
 539     const DolphinView* view = m_controller->dolphinView();
 540     updateDecorationSize(view->showPreview());
 541 }
 542
 543 void DolphinDetailsView::configureColumns(const QPoint& pos)
 544 {
 545     KMenu popup(this);
 546     popup.addTitle(i18nc("@title:menu", "Columns"));
 547
 548     QHeaderView* headerView = header();
 549     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 550         const int logicalIndex = headerView->logicalIndex(i);
 551         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 552         QAction* action = popup.addAction(text);
 553         action->setCheckable(true);
 554         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 555         action->setData(i);
 556     }
 557
 558     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 559     if (activatedAction != 0) {
 560         const bool show = activatedAction->isChecked();
 561         const int columnIndex = activatedAction->data().toInt();
 562
 563         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 564         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 565         if (show) {
 566             Q_ASSERT(!list.contains(info));
 567             list.append(info);
 568         } else {
 569             Q_ASSERT(list.contains(info));
 570             const int index = list.indexOf(info);
 571             list.removeAt(index);
 572         }
 573
 574         m_controller->indicateAdditionalInfoChange(list);
 575         setColumnHidden(columnIndex, !show);
 576     }
 577 }
 578
 579 void DolphinDetailsView::updateColumnVisibility()
 580 {
 581     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 582     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 583         const KFileItemDelegate::Information info = infoForColumn(i);
 584         const bool hide = !list.contains(info);
 585         if (isColumnHidden(i) != hide) {
 586             setColumnHidden(i, hide);
 587         }
 588     }
 589
 590     resizeColumns();
 591 }
 592
 593 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 594 {
 595     Q_UNUSED(logicalIndex);
 596     Q_UNUSED(oldSize);
 597     Q_UNUSED(newSize);
 598     if (QApplication::mouseButtons() & Qt::LeftButton) {
 599         disableAutoResizing();
 600     }
 601 }
 602
 603 void DolphinDetailsView::slotActivationChanged(bool active)
 604 {
 605     setAlternatingRowColors(active);
 606 }
 607
 608 void DolphinDetailsView::disableAutoResizing()
 609 {
 610     m_autoResize = false;
 611 }
 612
 613 void DolphinDetailsView::requestActivation()
 614 {
 615     m_controller->requestActivation();
 616 }
 617
 618 void DolphinDetailsView::updateFont()
 619 {
 620     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 621     Q_ASSERT(settings != 0);
 622
 623     if (settings->useSystemFont()) {
 624         m_font = KGlobalSettings::generalFont();
 625     }
 626 }
 627
 628 void DolphinDetailsView::updateElasticBandSelection()
 629 {
 630     if (!m_band.show) {
 631         return;
 632     }
 633
 634     // Ensure the elastic band itself is up-to-date, in
 635     // case we are being called due to e.g. a drag event.
 636     updateElasticBand();
 637
 638     // Clip horizontally to the name column, as some filenames will be
 639     // longer than the column.  We don't clip vertically as origin
 640     // may be above or below the current viewport area.
 641     const int nameColumnX = header()->sectionPosition(DolphinModel::Name);
 642     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 643     QRect selRect = elasticBandRect().normalized();
 644     QRect nameColumnRect(nameColumnX, selRect.y(), nameColumnWidth, selRect.height());
 645     selRect = nameColumnRect.intersect(selRect).normalized();
 646
 647     if (selRect.isNull()) {
 648         clearSelection();
 649         m_band.ignoreOldInfo = true;
 650         return;
 651     }
 652
 653     if (!m_band.ignoreOldInfo) {
 654         // Do some quick checks to see if we can rule out the need to
 655         // update the selection.
 656         Q_ASSERT(uniformRowHeights());
 657         QModelIndex dummyIndex = model()->index(0, 0);
 658         if (!dummyIndex.isValid()) {
 659             // No items in the model presumably.
 660             return;
 661         }
 662
 663         // If the elastic band does not cover the same rows as before, we'll
 664         // need to re-check, and also invalidate the old item distances.
 665         const int rowHeight = QTreeView::rowHeight(dummyIndex);
 666         const bool coveringSameRows =
 667             (selRect.top()    / rowHeight == m_band.oldSelectionRect.top()    / rowHeight) &&
 668             (selRect.bottom() / rowHeight == m_band.oldSelectionRect.bottom() / rowHeight);
 669         if (coveringSameRows) {
 670             // Covering the same rows, but have we moved far enough horizontally
 671             // that we might have (de)selected some other items?
 672             const QRect oldSelRect = m_band.oldSelectionRect;
 673             const bool itemSelectionChanged =
 674                 ((selRect.left() > oldSelRect.left()) &&
 675                  (selRect.left() > m_band.insideNearestLeftEdge)) ||
 676                 ((selRect.left() < oldSelRect.left()) &&
 677                  (selRect.left() <= m_band.outsideNearestLeftEdge)) ||
 678                 ((selRect.right() < oldSelRect.right()) &&
 679                  (selRect.left() >= m_band.insideNearestRightEdge)) ||
 680                 ((selRect.right() > oldSelRect.right()) &&
 681                  (selRect.right() >= m_band.outsideNearestRightEdge));
 682
 683             if (!itemSelectionChanged) {
 684                 return;
 685             }
 686         }
 687     }
 688
 689     // Do the selection from scratch. Force a update of the horizontal distances info.
 690     m_band.insideNearestLeftEdge   = nameColumnX + nameColumnWidth + 1;
 691     m_band.insideNearestRightEdge  = nameColumnX - 1;
 692     m_band.outsideNearestLeftEdge  = nameColumnX - 1;
 693     m_band.outsideNearestRightEdge = nameColumnX + nameColumnWidth + 1;
 694
 695     // Include the old selection rect as well, so we can deselect
 696     // items that were inside it but not in the new selRect.
 697     const QRect boundingRect = selRect.united(m_band.oldSelectionRect).normalized();
 698     if (boundingRect.isNull()) {
 699         return;
 700     }
 701
 702     // Get the index of the item in this row in the name column.
 703     // TODO - would this still work if the columns could be re-ordered?
 704     QModelIndex startIndex = QTreeView::indexAt(boundingRect.topLeft());
 705     if (startIndex.parent().isValid()) {
 706         startIndex = startIndex.parent().child(startIndex.row(), KDirModel::Name);
 707     } else {
 708         startIndex = model()->index(startIndex.row(), KDirModel::Name);
 709     }
 710
 711    // Go through all indexes between the top and bottom of boundingRect, and
 712    // update the selection.
 713    const int verticalCutoff = boundingRect.bottom();
 714    QModelIndex currIndex = startIndex;
 715    QModelIndex lastIndex;
 716    bool allItemsInBoundDone = false;
 717
 718    // Calling selectionModel()->select(...) for each item that needs to be
 719    // toggled is slow as each call emits selectionChanged(...) so store them
 720    // and do the selection toggle in one batch.
 721    QItemSelection itemsToToggle;
 722    // QItemSelection's deal with continuous ranges of indexes better than
 723    // single indexes, so try to portion items that need to be toggled into ranges.
 724    bool formingToggleIndexRange = false;
 725    QModelIndex toggleIndexRangeBegin = QModelIndex();
 726
 727    do {
 728        QRect currIndexRect = visualRect(currIndex);
 729        const QString name = m_controller->itemForIndex(currIndex).name();
 730        currIndexRect.setWidth(DolphinFileItemDelegate::nameColumnWidth(name, viewOptions()));
 731
 732         // Update some optimisation info as we go.
 733        const int cr = currIndexRect.right();
 734        const int cl = currIndexRect.left();
 735        const int sl = selRect.left();
 736        const int sr = selRect.right();
 737        // "The right edge of the name is outside of the rect but nearer than m_outsideNearestLeft", etc
 738        if ((cr < sl && cr > m_band.outsideNearestLeftEdge)) {
 739            m_band.outsideNearestLeftEdge = cr;
 740        }
 741        if ((cl > sr && cl < m_band.outsideNearestRightEdge)) {
 742            m_band.outsideNearestRightEdge = cl;
 743        }
 744        if ((cl >= sl && cl <= sr && cl > m_band.insideNearestRightEdge)) {
 745            m_band.insideNearestRightEdge = cl;
 746        }
 747        if ((cr >= sl && cr <= sr && cr < m_band.insideNearestLeftEdge)) {
 748            m_band.insideNearestLeftEdge = cr;
 749        }
 750
 751        bool currentlySelected = selectionModel()->isSelected(currIndex);
 752        bool intersectsSelectedRect = currIndexRect.intersects(selRect);
 753        bool needToToggleItem = (currentlySelected && !intersectsSelectedRect) || (!currentlySelected && intersectsSelectedRect);
 754        if (needToToggleItem && !formingToggleIndexRange) {
 755             toggleIndexRangeBegin = currIndex;
 756             formingToggleIndexRange = true;
 757        }
 758
 759        // NOTE: indexBelow actually walks up and down expanded trees for us.
 760        QModelIndex nextIndex = indexBelow(currIndex);
 761        allItemsInBoundDone = !nextIndex.isValid() || currIndexRect.top() > verticalCutoff;
 762
 763        const bool commitToggleIndexRange = formingToggleIndexRange &&
 764                                            (!needToToggleItem ||
 765                                             allItemsInBoundDone ||
 766                                             currIndex.parent() != toggleIndexRangeBegin.parent());
 767        if (commitToggleIndexRange) {
 768            itemsToToggle.select(toggleIndexRangeBegin, lastIndex );
 769            formingToggleIndexRange = false;
 770        }
 771
 772        // next item
 773        lastIndex = currIndex;
 774        currIndex = nextIndex;
 775     } while (!allItemsInBoundDone);
 776
 777     selectionModel()->select(itemsToToggle, QItemSelectionModel::Toggle);
 778
 779     m_band.oldSelectionRect = selRect;
 780     m_band.ignoreOldInfo = false;
 781 }
 782
 783 void DolphinDetailsView::updateDecorationSize(bool showPreview)
 784 {
 785     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 786     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 787     setIconSize(QSize(iconSize, iconSize));
 788     m_decorationSize = QSize(iconSize, iconSize);
 789
 790     if (m_selectionManager != 0) {
 791         m_selectionManager->reset();
 792     }
 793
 794     doItemsLayout();
 795 }
 796
 797 QPoint DolphinDetailsView::contentsPos() const
 798 {
 799     // implementation note: the horizonal position is ignored currently, as no
 800     // horizontal scrolling is done anyway during a selection
 801     const QScrollBar* scrollbar = verticalScrollBar();
 802     Q_ASSERT(scrollbar != 0);
 803
 804     const int maxHeight = maximumViewportSize().height();
 805     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 806     const int visibleHeight = model()->rowCount() + 1 - height;
 807     if (visibleHeight <= 0) {
 808         return QPoint(0, 0);
 809     }
 810
 811     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 812     return QPoint(0, y);
 813 }
 814
 815 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 816 {
 817     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 818
 819     switch (columnIndex) {
 820     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 821     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 822     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 823     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 824     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 825     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 826     default: break;
 827     }
 828
 829     return info;
 830 }
 831
 832 void DolphinDetailsView::resizeColumns()
 833 {
 834     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 835     // around 3 seconds for each (!) resize operation when having > 10000 items).
 836     // This gets a problem especially when opening large directories, where several
 837     // resize operations are received for showing the currently available items during
 838     // loading (the application hangs around 20 seconds when loading > 10000 items).
 839
 840     QHeaderView* headerView = header();
 841     QFontMetrics fontMetrics(viewport()->font());
 842
 843     int columnWidth[KDirModel::ColumnCount];
 844     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 845     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 846     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 847     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 848     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 849     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 850
 851     int requiredWidth = 0;
 852     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 853         if (!isColumnHidden(i)) {
 854             columnWidth[i] += 20; // provide a default gap
 855             requiredWidth += columnWidth[i];
 856             headerView->resizeSection(i, columnWidth[i]);
 857         }
 858     }
 859
 860     // resize the name column in a way that the whole available width is used
 861     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 862     if (columnWidth[KDirModel::Name] < 120) {
 863         columnWidth[KDirModel::Name] = 120;
 864     }
 865     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 866 }
 867
 868 QRect DolphinDetailsView::nameColumnRect(const QModelIndex& index) const
 869 {
 870     QRect rect = visualRect(index);
 871     const KFileItem item = m_controller->itemForIndex(index);
 872     if (!item.isNull()) {
 873         const int width = DolphinFileItemDelegate::nameColumnWidth(item.name(), viewOptions());
 874         rect.setWidth(width);
 875     }
 876
 877     return rect;
 878 }
 879
 880 DolphinDetailsView::ElasticBand::ElasticBand() :
 881     show(false),
 882     origin(),
 883     destination(),
 884     oldSelectionRect(),
 885     ignoreOldInfo(true),
 886     outsideNearestLeftEdge(0),
 887     outsideNearestRightEdge(0),
 888     insideNearestLeftEdge(0),
 889     insideNearestRightEdge(0)
 890 {
 891 }
 892
 893 #include "dolphindetailsview.moc"