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Diffstat (limited to 'src/views/dolphintreeview.cpp')
| -rw-r--r-- | src/views/dolphintreeview.cpp | 530 |
1 files changed, 0 insertions, 530 deletions
diff --git a/src/views/dolphintreeview.cpp b/src/views/dolphintreeview.cpp deleted file mode 100644 index 64b66aa84..000000000 --- a/src/views/dolphintreeview.cpp +++ /dev/null @@ -1,530 +0,0 @@ -/*************************************************************************** - * Copyright (C) 2010 by Peter Penz <[email protected]> * - * Copyright (C) 2008 by Simon St. James <[email protected]> * - * * - * This program is free software; you can redistribute it and/or modify * - * it under the terms of the GNU General Public License as published by * - * the Free Software Foundation; either version 2 of the License, or * - * (at your option) any later version. * - * * - * This program is distributed in the hope that it will be useful, * - * but WITHOUT ANY WARRANTY; without even the implied warranty of * - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * - * GNU General Public License for more details. * - * * - * You should have received a copy of the GNU General Public License * - * along with this program; if not, write to the * - * Free Software Foundation, Inc., * - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * - ***************************************************************************/ - -#include "dolphintreeview.h" - -#include "dolphinmodel.h" - -#include <QApplication> -#include <QEvent> -#include <QHeaderView> -#include <QMouseEvent> -#include <QPainter> -#include <QScrollBar> - -DolphinTreeView::DolphinTreeView(QWidget* parent) : - QTreeView(parent), - m_expandingTogglePressed(false), - m_useDefaultIndexAt(true), - m_ignoreScrollTo(false), - m_dropRect(), - m_band() -{ - setUniformRowHeights(true); -} - -DolphinTreeView::~DolphinTreeView() -{ -} - -void DolphinTreeView::keyboardSearch(const QString & search) -{ - const QModelIndex oldCurrent = currentIndex(); - QTreeView::keyboardSearch(search); - if (currentIndex() != oldCurrent) { - // The current index has changed, but it is not selected yet. - // To select it, we call setCurrentIndex(...). - setCurrentIndex(currentIndex()); - } -} - -QRegion DolphinTreeView::visualRegionForSelection(const QItemSelection& selection) const -{ - // We have to make sure that the visualRect of each model index is inside the region. - // QTreeView::visualRegionForSelection does not do it right because it assumes implicitly - // that all visualRects have the same width, which is in general not the case here. - QRegion selectionRegion; - const QModelIndexList indexes = selection.indexes(); - - foreach(const QModelIndex& index, indexes) { - selectionRegion += visualRect(index); - } - - return selectionRegion; -} - -bool DolphinTreeView::acceptsDrop(const QModelIndex& index) const -{ - Q_UNUSED(index); - return false; -} - -bool DolphinTreeView::event(QEvent* event) -{ - switch (event->type()) { - case QEvent::Polish: - m_useDefaultIndexAt = false; - break; - default: - break; - } - return QTreeView::event(event); -} - -void DolphinTreeView::mousePressEvent(QMouseEvent* event) -{ - const QModelIndex current = currentIndex(); - QTreeView::mousePressEvent(event); - - m_expandingTogglePressed = isAboveExpandingToggle(event->pos()); - - const QModelIndex index = indexAt(event->pos()); - const bool updateState = index.isValid() && - (index.column() == DolphinModel::Name) && - (event->button() == Qt::LeftButton); - if (updateState) { - setState(QAbstractItemView::DraggingState); - } - - if (!index.isValid() || (index.column() != DolphinModel::Name)) { - const Qt::KeyboardModifiers mod = QApplication::keyboardModifiers(); - if (!m_expandingTogglePressed && !(mod & Qt::ShiftModifier) && !(mod & Qt::ControlModifier)) { - clearSelection(); - } - - // Restore the current index, other columns are handled as viewport area. - // setCurrentIndex(...) implicitly calls scrollTo(...), which we want to ignore. - m_ignoreScrollTo = true; - selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current); - m_ignoreScrollTo = false; - - if ((event->button() == Qt::LeftButton) && !m_expandingTogglePressed) { - // Inform Qt about what we are doing - otherwise it starts dragging items around! - setState(DragSelectingState); - m_band.show = true; - // Incremental update data will not be useful - start from scratch. - m_band.ignoreOldInfo = true; - const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value()); - m_band.origin = event->pos() + scrollPos; - m_band.destination = m_band.origin; - m_band.originalSelection = selectionModel()->selection(); - } - } -} - -void DolphinTreeView::mouseMoveEvent(QMouseEvent* event) -{ - if (m_expandingTogglePressed) { - // Per default QTreeView starts either a selection or a drag operation when dragging - // the expanding toggle button (Qt-issue - see TODO comment in DolphinIconsView::mousePressEvent()). - // Turn off this behavior in Dolphin to stay predictable: - setState(QAbstractItemView::NoState); - return; - } - - if (m_band.show) { - const QPoint mousePos = event->pos(); - const QModelIndex index = indexAt(mousePos); - if (!index.isValid()) { - // The destination of the selection rectangle is above the viewport. In this - // case QTreeView does no selection at all, which is not the wanted behavior - // in Dolphin. Select all items within the elastic band rectangle. - updateElasticBandSelection(); - } - - // TODO: Enable QTreeView::mouseMoveEvent(event) again, as soon - // as the Qt-issue #199631 has been fixed. - // QTreeView::mouseMoveEvent(event); - QAbstractItemView::mouseMoveEvent(event); - updateElasticBand(); - } else { - // TODO: Enable QTreeView::mouseMoveEvent(event) again, as soon - // as the Qt-issue #199631 has been fixed. - // QTreeView::mouseMoveEvent(event); - QAbstractItemView::mouseMoveEvent(event); - } -} - -void DolphinTreeView::mouseReleaseEvent(QMouseEvent* event) -{ - if (!m_expandingTogglePressed) { - const QModelIndex index = indexAt(event->pos()); - if (index.isValid() && (index.column() == DolphinModel::Name)) { - QTreeView::mouseReleaseEvent(event); - } else { - // don't change the current index if the cursor is released - // above any other column than the name column, as the other - // columns act as viewport - const QModelIndex current = currentIndex(); - QTreeView::mouseReleaseEvent(event); - selectionModel()->setCurrentIndex(current, QItemSelectionModel::Current); - } - } - m_expandingTogglePressed = false; - - if (m_band.show) { - setState(NoState); - updateElasticBand(); - m_band.show = false; - } -} - -void DolphinTreeView::startDrag(Qt::DropActions supportedActions) -{ - Q_UNUSED(supportedActions); - m_band.show = false; -} - -void DolphinTreeView::dragEnterEvent(QDragEnterEvent* event) -{ - Q_UNUSED(event); - if (m_band.show) { - updateElasticBand(); - m_band.show = false; - } -} - -void DolphinTreeView::dragMoveEvent(QDragMoveEvent* event) -{ - QTreeView::dragMoveEvent(event); - - setDirtyRegion(m_dropRect); - - const QModelIndex index = indexAt(event->pos()); - if (acceptsDrop(index)) { - m_dropRect = visualRect(index); - } else { - m_dropRect.setSize(QSize()); // set invalid - } - setDirtyRegion(m_dropRect); -} - -void DolphinTreeView::dragLeaveEvent(QDragLeaveEvent* event) -{ - QTreeView::dragLeaveEvent(event); - setDirtyRegion(m_dropRect); -} - -void DolphinTreeView::paintEvent(QPaintEvent* event) -{ - QTreeView::paintEvent(event); - if (m_band.show) { - // The following code has been taken from QListView - // and adapted to DolphinDetailsView. - // (C) 1992-2007 Trolltech ASA - QStyleOptionRubberBand opt; - opt.initFrom(this); - opt.shape = QRubberBand::Rectangle; - opt.opaque = false; - opt.rect = elasticBandRect(); - - QPainter painter(viewport()); - painter.save(); - style()->drawControl(QStyle::CE_RubberBand, &opt, &painter); - painter.restore(); - } -} - -QModelIndex DolphinTreeView::indexAt(const QPoint& point) const -{ - // The blank portion of the name column counts as empty space - const QModelIndex index = QTreeView::indexAt(point); - const bool isAboveEmptySpace = !m_useDefaultIndexAt && - (index.column() == KDirModel::Name) && - !visualRect(index).contains(point); - return isAboveEmptySpace ? QModelIndex() : index; -} - -void DolphinTreeView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags command) -{ - // We must override setSelection() as Qt calls it internally and when this happens - // we must ensure that the default indexAt() is used. - if (!m_band.show) { - m_useDefaultIndexAt = true; - QTreeView::setSelection(rect, command); - m_useDefaultIndexAt = false; - } else { - // Use our own elastic band selection algorithm - updateElasticBandSelection(); - } -} - - -void DolphinTreeView::scrollTo(const QModelIndex & index, ScrollHint hint) -{ - if (!m_ignoreScrollTo) { - QTreeView::scrollTo(index, hint); - } -} - -void DolphinTreeView::updateElasticBandSelection() -{ - if (!m_band.show) { - return; - } - - // Ensure the elastic band itself is up-to-date, in - // case we are being called due to e.g. a drag event. - updateElasticBand(); - - // Clip horizontally to the name column, as some filenames will be - // longer than the column. We don't clip vertically as origin - // may be above or below the current viewport area. - const int nameColumnX = header()->sectionPosition(DolphinModel::Name); - const int nameColumnWidth = header()->sectionSize(DolphinModel::Name); - QRect selRect = elasticBandRect().normalized(); - QRect nameColumnArea(nameColumnX, selRect.y(), nameColumnWidth, selRect.height()); - selRect = nameColumnArea.intersect(selRect).normalized(); - // Get the last elastic band rectangle, expressed in viewpoint coordinates. - const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value()); - QRect oldSelRect = QRect(m_band.lastSelectionOrigin - scrollPos, m_band.lastSelectionDestination - scrollPos).normalized(); - - if (selRect.isNull()) { - selectionModel()->select(m_band.originalSelection, QItemSelectionModel::ClearAndSelect); - m_band.ignoreOldInfo = true; - return; - } - - if (!m_band.ignoreOldInfo) { - // Do some quick checks to see if we can rule out the need to - // update the selection. - Q_ASSERT(uniformRowHeights()); - QModelIndex dummyIndex = model()->index(0, 0); - if (!dummyIndex.isValid()) { - // No items in the model presumably. - return; - } - - // If the elastic band does not cover the same rows as before, we'll - // need to re-check, and also invalidate the old item distances. - const int rowHeight = QTreeView::rowHeight(dummyIndex); - const bool coveringSameRows = - (selRect.top() / rowHeight == oldSelRect.top() / rowHeight) && - (selRect.bottom() / rowHeight == oldSelRect.bottom() / rowHeight); - if (coveringSameRows) { - // Covering the same rows, but have we moved far enough horizontally - // that we might have (de)selected some other items? - const bool itemSelectionChanged = - ((selRect.left() > oldSelRect.left()) && - (selRect.left() > m_band.insideNearestLeftEdge)) || - ((selRect.left() < oldSelRect.left()) && - (selRect.left() <= m_band.outsideNearestLeftEdge)) || - ((selRect.right() < oldSelRect.right()) && - (selRect.left() >= m_band.insideNearestRightEdge)) || - ((selRect.right() > oldSelRect.right()) && - (selRect.right() >= m_band.outsideNearestRightEdge)); - - if (!itemSelectionChanged) { - return; - } - } - } else { - // This is the only piece of optimization data that needs to be explicitly - // discarded. - m_band.lastSelectionOrigin = QPoint(); - m_band.lastSelectionDestination = QPoint(); - oldSelRect = selRect; - } - - // Do the selection from scratch. Force a update of the horizontal distances info. - m_band.insideNearestLeftEdge = nameColumnX + nameColumnWidth + 1; - m_band.insideNearestRightEdge = nameColumnX - 1; - m_band.outsideNearestLeftEdge = nameColumnX - 1; - m_band.outsideNearestRightEdge = nameColumnX + nameColumnWidth + 1; - - // Include the old selection rect as well, so we can deselect - // items that were inside it but not in the new selRect. - const QRect boundingRect = selRect.united(oldSelRect).normalized(); - if (boundingRect.isNull()) { - return; - } - - // Get the index of the item in this row in the name column. - // TODO - would this still work if the columns could be re-ordered? - QModelIndex startIndex = QTreeView::indexAt(boundingRect.topLeft()); - if (startIndex.parent().isValid()) { - startIndex = startIndex.parent().child(startIndex.row(), KDirModel::Name); - } else { - startIndex = model()->index(startIndex.row(), KDirModel::Name); - } - if (!startIndex.isValid()) { - selectionModel()->select(m_band.originalSelection, QItemSelectionModel::ClearAndSelect); - m_band.ignoreOldInfo = true; - return; - } - - // Go through all indexes between the top and bottom of boundingRect, and - // update the selection. - const int verticalCutoff = boundingRect.bottom(); - QModelIndex currIndex = startIndex; - QModelIndex lastIndex; - bool allItemsInBoundDone = false; - - // Calling selectionModel()->select(...) for each item that needs to be - // toggled is slow as each call emits selectionChanged(...) so store them - // and do the selection toggle in one batch. - QItemSelection itemsToToggle; - // QItemSelection's deal with continuous ranges of indexes better than - // single indexes, so try to portion items that need to be toggled into ranges. - bool formingToggleIndexRange = false; - QModelIndex toggleIndexRangeBegin = QModelIndex(); - - do { - QRect currIndexRect = visualRect(currIndex); - - // Update some optimization info as we go. - const int cr = currIndexRect.right(); - const int cl = currIndexRect.left(); - const int sl = selRect.left(); - const int sr = selRect.right(); - // "The right edge of the name is outside of the rect but nearer than m_outsideNearestLeft", etc - if ((cr < sl && cr > m_band.outsideNearestLeftEdge)) { - m_band.outsideNearestLeftEdge = cr; - } - if ((cl > sr && cl < m_band.outsideNearestRightEdge)) { - m_band.outsideNearestRightEdge = cl; - } - if ((cl >= sl && cl <= sr && cl > m_band.insideNearestRightEdge)) { - m_band.insideNearestRightEdge = cl; - } - if ((cr >= sl && cr <= sr && cr < m_band.insideNearestLeftEdge)) { - m_band.insideNearestLeftEdge = cr; - } - - bool currentlySelected = selectionModel()->isSelected(currIndex); - bool originallySelected = m_band.originalSelection.contains(currIndex); - bool intersectsSelectedRect = currIndexRect.intersects(selRect); - bool shouldBeSelected = (intersectsSelectedRect && !originallySelected) || (!intersectsSelectedRect && originallySelected); - bool needToToggleItem = (currentlySelected && !shouldBeSelected) || (!currentlySelected && shouldBeSelected); - if (needToToggleItem && !formingToggleIndexRange) { - toggleIndexRangeBegin = currIndex; - formingToggleIndexRange = true; - } - - // NOTE: indexBelow actually walks up and down expanded trees for us. - QModelIndex nextIndex = indexBelow(currIndex); - allItemsInBoundDone = !nextIndex.isValid() || currIndexRect.top() > verticalCutoff; - - const bool commitToggleIndexRange = formingToggleIndexRange && - (!needToToggleItem || - allItemsInBoundDone || - currIndex.parent() != toggleIndexRangeBegin.parent()); - if (commitToggleIndexRange) { - formingToggleIndexRange = false; - // If this is the last item in the bounds and it is also the beginning of a range, - // don't toggle lastIndex - it will already have been dealt with. - if (!allItemsInBoundDone || toggleIndexRangeBegin != currIndex) { - itemsToToggle.select(toggleIndexRangeBegin, lastIndex); - } - // Need to start a new range immediately with currIndex? - if (needToToggleItem) { - toggleIndexRangeBegin = currIndex; - formingToggleIndexRange = true; - } - if (allItemsInBoundDone && needToToggleItem) { - // Toggle the very last item in the bounds. - itemsToToggle.select(currIndex, currIndex); - } - } - - // Next item - lastIndex = currIndex; - currIndex = nextIndex; - } while (!allItemsInBoundDone); - - - selectionModel()->select(itemsToToggle, QItemSelectionModel::Toggle); - - m_band.lastSelectionOrigin = m_band.origin; - m_band.lastSelectionDestination = m_band.destination; - m_band.ignoreOldInfo = false; -} - -void DolphinTreeView::updateElasticBand() -{ - if (m_band.show) { - QRect dirtyRegion(elasticBandRect()); - const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value()); - m_band.destination = viewport()->mapFromGlobal(QCursor::pos()) + scrollPos; - // Going above the (logical) top-left of the view causes complications during selection; - // we may as well prevent it. - if (m_band.destination.y() < 0) { - m_band.destination.setY(0); - } - if (m_band.destination.x() < 0) { - m_band.destination.setX(0); - } - dirtyRegion = dirtyRegion.united(elasticBandRect()); - setDirtyRegion(dirtyRegion); - } -} - -QRect DolphinTreeView::elasticBandRect() const -{ - const QPoint scrollPos(horizontalScrollBar()->value(), verticalScrollBar()->value()); - - const QPoint topLeft = m_band.origin - scrollPos; - const QPoint bottomRight = m_band.destination - scrollPos; - return QRect(topLeft, bottomRight).normalized(); -} - -bool DolphinTreeView::isAboveExpandingToggle(const QPoint& pos) const -{ - // QTreeView offers no public API to get the information whether an index has an - // expanding toggle and what boundaries the toggle has. The following approach - // also assumes a toggle for file items. - if (itemsExpandable()) { - const QModelIndex index = QTreeView::indexAt(pos); - if (index.isValid() && (index.column() == KDirModel::Name)) { - QRect rect = visualRect(index); - const int toggleSize = rect.height(); - if (isRightToLeft()) { - rect.moveRight(rect.right()); - } else { - rect.moveLeft(rect.x() - toggleSize); - } - rect.setWidth(toggleSize); - - QStyleOption opt; - opt.initFrom(this); - opt.rect = rect; - rect = style()->subElementRect(QStyle::SE_TreeViewDisclosureItem, &opt, this); - - return rect.contains(pos); - } - } - return false; -} - -DolphinTreeView::ElasticBand::ElasticBand() : - show(false), - origin(), - destination(), - lastSelectionOrigin(), - lastSelectionDestination(), - ignoreOldInfo(true), - outsideNearestLeftEdge(0), - outsideNearestRightEdge(0), - insideNearestLeftEdge(0), - insideNearestRightEdge(0) -{ -} - -#include "dolphintreeview.moc" |