src/dolphindetailsview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz                                      *
   3  *   peter.penz@gmx.at                                                     *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  19  ***************************************************************************/
  20
  21 #include "dolphindetailsview.h"
  22
  23 #include "dolphinmodel.h"
  24 #include "dolphincontroller.h"
  25 #include "dolphinsettings.h"
  26 #include "dolphinsortfilterproxymodel.h"
  27 #include "draganddrophelper.h"
  28 #include "selectionmanager.h"
  29 #include "viewproperties.h"
  30 #include "zoomlevelinfo.h"
  31
  32 #include "dolphin_detailsmodesettings.h"
  33 #include "dolphin_generalsettings.h"
  34
  35 #include <kdirmodel.h>
  36 #include <klocale.h>
  37 #include <kmenu.h>
  38
  39 #include <QAbstractProxyModel>
  40 #include <QAction>
  41 #include <QApplication>
  42 #include <QHeaderView>
  43 #include <QRubberBand>
  44 #include <QPainter>
  45 #include <QScrollBar>
  46
  47 DolphinDetailsView::DolphinDetailsView(QWidget* parent, DolphinController* controller) :
  48     QTreeView(parent),
  49         m_autoResize(true),
  50     m_expandingTogglePressed(false),
  51     m_keyPressed(false),
  52     m_useDefaultIndexAt(true),
  53     m_controller(controller),
  54     m_selectionManager(0),
  55     m_font(),
  56     m_decorationSize(),
  57     m_showElasticBand(false),
  58     m_elasticBandOrigin(),
  59     m_elasticBandDestination()
  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         }
 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         m_showElasticBand = true;
 237         const QPoint pos = contentsPos();
 238         const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 239         m_elasticBandOrigin = event->pos() + pos + scrollPos;
 240         m_elasticBandDestination = m_elasticBandOrigin;
 241     }
 242 }
 243
 244 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 245 {
 246     if (m_showElasticBand) {
 247         const QPoint mousePos = event->pos();
 248         const QModelIndex index = indexAt(mousePos);
 249         if (!index.isValid()) {
 250             // the destination of the selection rectangle is above the viewport. In this
 251             // case QTreeView does no selection at all, which is not the wanted behavior
 252             // in Dolphin -> select all items within the elastic band rectangle
 253             clearSelection();
 254             setState(DragSelectingState);
 255
 256             const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 257             QRect selRect = elasticBandRect();
 258             const QRect nameColumnsRect(0, 0, nameColumnWidth, viewport()->height());
 259             selRect = nameColumnsRect.intersected(selRect);
 260
 261             setSelection(selRect, QItemSelectionModel::Select);
 262
 263         }
 264
 265         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 266         // as the Qt-issue #199631 has been fixed.
 267         // QTreeView::mouseMoveEvent(event);
 268         QAbstractItemView::mouseMoveEvent(event);
 269         updateElasticBand();
 270     } else {
 271         // TODO: enable QTreeView::mouseMoveEvent(event) again, as soon
 272         // as the Qt-issue #199631 has been fixed.
 273         // QTreeView::mouseMoveEvent(event);
 274         QAbstractItemView::mouseMoveEvent(event);
 275     }
 276
 277     if (m_expandingTogglePressed) {
 278         // Per default QTreeView starts either a selection or a drag operation when dragging
 279         // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()).
 280         // Turn off this behavior in Dolphin to stay predictable:
 281         clearSelection();
 282         setState(QAbstractItemView::NoState);
 283     }
 284 }
 285
 286 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 287 {
 288     const QModelIndex index = indexAt(event->pos());
 289     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 290         QTreeView::mouseReleaseEvent(event);
 291     } else {
 292         // don't change the current index if the cursor is released
 293         // above any other column than the name column, as the other
 294         // columns act as viewport
 295         const QModelIndex current = currentIndex();
 296         QTreeView::mouseReleaseEvent(event);
 297         selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current);
 298     }
 299
 300     m_expandingTogglePressed = false;
 301     if (m_showElasticBand) {
 302         setState(NoState);
 303         updateElasticBand();
 304         m_showElasticBand = false;
 305     }
 306 }
 307
 308 void DolphinDetailsView::startDrag(Qt::DropActions supportedActions)
 309 {
 310     DragAndDropHelper::startDrag(this, supportedActions);
 311     m_showElasticBand = false;
 312 }
 313
 314 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 315 {
 316     if (event->mimeData()->hasUrls()) {
 317         event->acceptProposedAction();
 318     }
 319
 320     if (m_showElasticBand) {
 321         updateElasticBand();
 322         m_showElasticBand = false;
 323     }
 324 }
 325
 326 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 327 {
 328     QTreeView::dragLeaveEvent(event);
 329     setDirtyRegion(m_dropRect);
 330 }
 331
 332 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 333 {
 334     QTreeView::dragMoveEvent(event);
 335
 336     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 337     setDirtyRegion(m_dropRect);
 338     const QModelIndex index = indexAt(event->pos());
 339     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 340         const KFileItem item = m_controller->itemForIndex(index);
 341         if (!item.isNull() && item.isDir()) {
 342             m_dropRect = visualRect(index);
 343         } else {
 344             m_dropRect.setSize(QSize()); // set as invalid
 345         }
 346         setDirtyRegion(m_dropRect);
 347     }
 348
 349     if (event->mimeData()->hasUrls()) {
 350         // accept url drops, independently from the destination item
 351         event->acceptProposedAction();
 352     }
 353 }
 354
 355 void DolphinDetailsView::dropEvent(QDropEvent* event)
 356 {
 357     const QModelIndex index = indexAt(event->pos());
 358     KFileItem item;
 359     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 360         item = m_controller->itemForIndex(index);
 361     }
 362     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 363     QTreeView::dropEvent(event);
 364 }
 365
 366 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 367 {
 368     QTreeView::paintEvent(event);
 369     if (m_showElasticBand) {
 370         // The following code has been taken from QListView
 371         // and adapted to DolphinDetailsView.
 372         // (C) 1992-2007 Trolltech ASA
 373         QStyleOptionRubberBand opt;
 374         opt.initFrom(this);
 375         opt.shape = QRubberBand::Rectangle;
 376         opt.opaque = false;
 377         opt.rect = elasticBandRect();
 378
 379         QPainter painter(viewport());
 380         painter.save();
 381         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 382         painter.restore();
 383     }
 384 }
 385
 386 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 387 {
 388     // If the Control modifier is pressed, a multiple selection
 389     // is done and DolphinDetailsView::currentChanged() may not
 390     // not change the selection in a custom way.
 391     m_keyPressed = !(event->modifiers() & Qt::ControlModifier);
 392
 393     QTreeView::keyPressEvent(event);
 394     m_controller->handleKeyPressEvent(event);
 395 }
 396
 397 void DolphinDetailsView::keyReleaseEvent(QKeyEvent* event)
 398 {
 399     QTreeView::keyReleaseEvent(event);
 400     m_keyPressed = false;
 401 }
 402
 403 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 404 {
 405     if (m_autoResize) {
 406         resizeColumns();
 407     }
 408     QTreeView::resizeEvent(event);
 409 }
 410
 411 void DolphinDetailsView::wheelEvent(QWheelEvent* event)
 412 {
 413     if (m_selectionManager != 0) {
 414         m_selectionManager->reset();
 415     }
 416
 417     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 418     if (event->modifiers() & Qt::ControlModifier) {
 419         event->ignore();
 420         return;
 421     }
 422
 423     QTreeView::wheelEvent(event);
 424 }
 425
 426 void DolphinDetailsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 427 {
 428     QTreeView::currentChanged(current, previous);
 429
 430     // Stay consistent with QListView: When changing the current index by key presses,
 431     // also change the selection.
 432     if (m_keyPressed) {
 433         selectionModel()->select(current, QItemSelectionModel::ClearAndSelect);
 434     }
 435 }
 436
 437 bool DolphinDetailsView::eventFilter(QObject* watched, QEvent* event)
 438 {
 439     if ((watched == viewport()) && (event->type() == QEvent::Leave)) {
 440         // if the mouse is above an item and moved very fast outside the widget,
 441         // no viewportEntered() signal might be emitted although the mouse has been moved
 442         // above the viewport
 443         m_controller->emitViewportEntered();
 444     }
 445
 446     return QTreeView::eventFilter(watched, event);
 447 }
 448
 449 QModelIndex DolphinDetailsView::indexAt(const QPoint& point) const
 450 {
 451     // the blank portion of the name column counts as empty space
 452     const QModelIndex index = QTreeView::indexAt(point);
 453     const bool isAboveEmptySpace  = !m_useDefaultIndexAt &&
 454                                     (index.column() == KDirModel::Name) && !nameColumnRect(index).contains(point);
 455     return isAboveEmptySpace ? QModelIndex() : index;
 456 }
 457
 458 void DolphinDetailsView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command)
 459 {
 460     // We must override setSelection() as Qt calls it internally and when this happens
 461     // we must ensure that the default indexAt() is used.
 462     if (!m_showElasticBand) {
 463         m_useDefaultIndexAt = true;
 464         QTreeView::setSelection(rect, command);
 465         m_useDefaultIndexAt = false;
 466     } else {
 467         // Select the items contained within the elastic band.
 468
 469         // TODO - would this still work if the columns could be re-ordered
 470         // (which I want to implement eventually :))?
 471
 472         // Very naive implementation - clears all selected, then walks a tree,
 473         // selecting all items whose nameColumnRect(...) intersects rect.
 474
 475         // Choose a sensible startIndex - a parentless index in the
 476         // name column, as close to the top of the rect as we
 477         // can find.
 478         QRect normalisedRect = rect.normalized();
 479         QModelIndex startIndex = QTreeView::indexAt(normalisedRect.topLeft());
 480         if (startIndex.isValid()) {
 481             while (startIndex.parent().isValid()) {
 482                 startIndex = startIndex.parent();
 483             }
 484         } else {
 485             // just pick the topmost row for safety
 486             model()->index(0, KDirModel::Name);
 487         }
 488         startIndex = model()->index(startIndex.row(), KDirModel::Name);
 489         clearSelection();
 490         setSelectionRecursive(startIndex, normalisedRect, command);
 491     }
 492 }
 493
 494 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 495 {
 496     QHeaderView* headerView = header();
 497     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 498 }
 499
 500 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 501 {
 502     QHeaderView* headerView = header();
 503     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 504 }
 505
 506 void DolphinDetailsView::synchronizeSortingState(int column)
 507 {
 508     // The sorting has already been changed in QTreeView if this slot is
 509     // invoked, but Dolphin is not informed about this.
 510     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 511     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 512     m_controller->indicateSortingChange(sorting);
 513     m_controller->indicateSortOrderChange(sortOrder);
 514 }
 515
 516 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 517 {
 518     if (index.column() == DolphinModel::Name) {
 519         m_controller->emitItemEntered(index);
 520     } else {
 521         m_controller->emitViewportEntered();
 522     }
 523 }
 524
 525 void DolphinDetailsView::updateElasticBand()
 526 {
 527     if (m_showElasticBand) {
 528         QRect dirtyRegion(elasticBandRect());
 529         const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 530         m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos()) + scrollPos;
 531         dirtyRegion = dirtyRegion.united(elasticBandRect());
 532         setDirtyRegion(dirtyRegion);
 533     }
 534 }
 535
 536 QRect DolphinDetailsView::elasticBandRect() const
 537 {
 538     const QPoint pos(contentsPos());
 539     const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value());
 540
 541     const QPoint topLeft = m_elasticBandOrigin - pos - scrollPos;
 542     const QPoint bottomRight = m_elasticBandDestination - pos - scrollPos;
 543     return QRect(topLeft, bottomRight).normalized();
 544 }
 545
 546 void DolphinDetailsView::setZoomLevel(int level)
 547 {
 548     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 549     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 550
 551     const bool showPreview = m_controller->dolphinView()->showPreview();
 552     if (showPreview) {
 553         settings->setPreviewSize(size);
 554     } else {
 555         settings->setIconSize(size);
 556     }
 557
 558     updateDecorationSize(showPreview);
 559 }
 560
 561
 562 void DolphinDetailsView::slotShowPreviewChanged()
 563 {
 564     const DolphinView* view = m_controller->dolphinView();
 565     updateDecorationSize(view->showPreview());
 566 }
 567
 568 void DolphinDetailsView::configureColumns(const QPoint& pos)
 569 {
 570     KMenu popup(this);
 571     popup.addTitle(i18nc("@title:menu", "Columns"));
 572
 573     QHeaderView* headerView = header();
 574     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 575         const int logicalIndex = headerView->logicalIndex(i);
 576         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 577         QAction* action = popup.addAction(text);
 578         action->setCheckable(true);
 579         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 580         action->setData(i);
 581     }
 582
 583     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 584     if (activatedAction != 0) {
 585         const bool show = activatedAction->isChecked();
 586         const int columnIndex = activatedAction->data().toInt();
 587
 588         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 589         const KFileItemDelegate::Information info = infoForColumn(columnIndex);
 590         if (show) {
 591             Q_ASSERT(!list.contains(info));
 592             list.append(info);
 593         } else {
 594             Q_ASSERT(list.contains(info));
 595             const int index = list.indexOf(info);
 596             list.removeAt(index);
 597         }
 598
 599         m_controller->indicateAdditionalInfoChange(list);
 600         setColumnHidden(columnIndex, !show);
 601     }
 602 }
 603
 604 void DolphinDetailsView::updateColumnVisibility()
 605 {
 606     const KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 607     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 608         const KFileItemDelegate::Information info = infoForColumn(i);
 609         const bool hide = !list.contains(info);
 610         if (isColumnHidden(i) != hide) {
 611             setColumnHidden(i, hide);
 612         }
 613     }
 614
 615     resizeColumns();
 616 }
 617
 618 void DolphinDetailsView::slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize)
 619 {
 620     Q_UNUSED(logicalIndex);
 621     Q_UNUSED(oldSize);
 622     Q_UNUSED(newSize);
 623     if (QApplication::mouseButtons() & Qt::LeftButton) {
 624         disableAutoResizing();
 625     }
 626 }
 627
 628 void DolphinDetailsView::slotActivationChanged(bool active)
 629 {
 630     setAlternatingRowColors(active);
 631 }
 632
 633 void DolphinDetailsView::disableAutoResizing()
 634 {
 635     m_autoResize = false;
 636 }
 637
 638 void DolphinDetailsView::requestActivation()
 639 {
 640     m_controller->requestActivation();
 641 }
 642
 643 void DolphinDetailsView::updateFont()
 644 {
 645     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 646     Q_ASSERT(settings != 0);
 647
 648     if (settings->useSystemFont()) {
 649         m_font = KGlobalSettings::generalFont();
 650     }
 651 }
 652
 653 void DolphinDetailsView::updateDecorationSize(bool showPreview)
 654 {
 655     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 656     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 657     setIconSize(QSize(iconSize, iconSize));
 658     m_decorationSize = QSize(iconSize, iconSize);
 659
 660     if (m_selectionManager != 0) {
 661         m_selectionManager->reset();
 662     }
 663
 664     doItemsLayout();
 665 }
 666
 667 QPoint DolphinDetailsView::contentsPos() const
 668 {
 669     // implementation note: the horizonal position is ignored currently, as no
 670     // horizontal scrolling is done anyway during a selection
 671     const QScrollBar* scrollbar = verticalScrollBar();
 672     Q_ASSERT(scrollbar != 0);
 673
 674     const int maxHeight = maximumViewportSize().height();
 675     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 676     const int visibleHeight = model()->rowCount() + 1 - height;
 677     if (visibleHeight <= 0) {
 678         return QPoint(0, 0);
 679     }
 680
 681     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 682     return QPoint(0, y);
 683 }
 684
 685 KFileItemDelegate::Information DolphinDetailsView::infoForColumn(int columnIndex) const
 686 {
 687     KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 688
 689     switch (columnIndex) {
 690     case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 691     case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 692     case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 693     case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 694     case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 695     case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 696     default: break;
 697     }
 698
 699     return info;
 700 }
 701
 702 void DolphinDetailsView::resizeColumns()
 703 {
 704     // Using the resize mode QHeaderView::ResizeToContents is too slow (it takes
 705     // around 3 seconds for each (!) resize operation when having > 10000 items).
 706     // This gets a problem especially when opening large directories, where several
 707     // resize operations are received for showing the currently available items during
 708     // loading (the application hangs around 20 seconds when loading > 10000 items).
 709
 710     QHeaderView* headerView = header();
 711     QFontMetrics fontMetrics(viewport()->font());
 712
 713     int columnWidth[KDirModel::ColumnCount];
 714     columnWidth[KDirModel::Size] = fontMetrics.width("00000 Items");
 715     columnWidth[KDirModel::ModifiedTime] = fontMetrics.width("0000-00-00 00:00");
 716     columnWidth[KDirModel::Permissions] = fontMetrics.width("xxxxxxxxxx");
 717     columnWidth[KDirModel::Owner] = fontMetrics.width("xxxxxxxxxx");
 718     columnWidth[KDirModel::Group] = fontMetrics.width("xxxxxxxxxx");
 719     columnWidth[KDirModel::Type] = fontMetrics.width("XXXX Xxxxxxx");
 720
 721     int requiredWidth = 0;
 722     for (int i = KDirModel::Size; i <= KDirModel::Type; ++i) {
 723         if (!isColumnHidden(i)) {
 724             columnWidth[i] += 20; // provide a default gap
 725             requiredWidth += columnWidth[i];
 726             headerView->resizeSection(i, columnWidth[i]);
 727         }
 728     }
 729
 730     // resize the name column in a way that the whole available width is used
 731     columnWidth[KDirModel::Name] = viewport()->width() - requiredWidth;
 732     if (columnWidth[KDirModel::Name] < 120) {
 733         columnWidth[KDirModel::Name] = 120;
 734     }
 735     headerView->resizeSection(KDirModel::Name, columnWidth[KDirModel::Name]);
 736 }
 737
 738 QRect DolphinDetailsView::nameColumnRect(const QModelIndex& index) const
 739 {
 740     // TODO: The code guesses the width of the name, but it is defined
 741     // by KFileItemDelegate. Find a way to tell the item delegate to
 742     // use a specified width.
 743     QRect guessedItemContentRect = visualRect(index);
 744     const KFileItem fileItem = m_controller->itemForIndex(index);
 745     if (!fileItem.isNull()) {
 746         QStyleOptionViewItem itemStyle = viewOptions();
 747         QFontMetrics fontMetrics(itemStyle.font);
 748         const int itemContentWidth = itemStyle.decorationSize.width() + fontMetrics.width(fileItem.name());
 749         guessedItemContentRect.setWidth(itemContentWidth);
 750     }
 751
 752     return guessedItemContentRect;
 753 }
 754
 755 void DolphinDetailsView::setSelectionRecursive(const QModelIndex& startIndex,
 756                                                const QRect& rect,
 757                                                QItemSelectionModel::SelectionFlags command)
 758 {
 759     if (!startIndex.isValid()) {
 760         return;
 761     }
 762
 763     // rect is assumed to be in viewport coordinates and normalized.
 764     // Move down through the siblings of startIndex, exploring the children
 765     // of any expanded nodes.
 766     Q_ASSERT(rect.width() >= 0 && rect.height() >= 0);
 767     QModelIndex currIndex = startIndex;
 768     do {
 769         const QModelIndex belowIndex = indexBelow(currIndex);
 770         if (isExpanded(currIndex)) {
 771             // If belowIndex exists and is above the top of rect, then we need not explore
 772             // the children of currIndex as they will always be above "below".  Otherwise,
 773             // explore the children.
 774             if (!belowIndex.isValid() || visualRect(belowIndex).bottom() >= rect.top()) {
 775                 setSelectionRecursive(currIndex.child(0, currIndex.column()), rect, command);
 776             }
 777         }
 778
 779         QRect itemContentRect = nameColumnRect(currIndex);
 780         if (itemContentRect.top() > rect.bottom()) {
 781             // All remaining items will be below itemContentRect, so we may cull.
 782             return;
 783         }
 784
 785         if (itemContentRect.intersects(rect)) {
 786             selectionModel()->select(currIndex, QItemSelectionModel::Select);
 787         }
 788
 789         currIndex = belowIndex;
 790     } while (currIndex.isValid());
 791 }
 792
 793 #include "dolphindetailsview.moc"