diff options
Diffstat (limited to 'src/quick/items/qquicktableview.cpp')
| -rw-r--r-- | src/quick/items/qquicktableview.cpp | 920 |
1 files changed, 586 insertions, 334 deletions
diff --git a/src/quick/items/qquicktableview.cpp b/src/quick/items/qquicktableview.cpp index 9cd407b0fd..ac3397d2a9 100644 --- a/src/quick/items/qquicktableview.cpp +++ b/src/quick/items/qquicktableview.cpp @@ -150,6 +150,11 @@ must call \l forceLayout. This informs TableView that it needs to use the provider functions again to recalculate and update the layout. + Since Qt 5.13, if you want to hide a specific column, you can return \c 0 from the + \l columnWidthProvider for that column. Likewise, you can return 0 from the + \l rowHeightProvider to hide a row. If you return a negative number, TableView + will fall back to calculate the size based on the delegate items. + \note The size of a row or column should be a whole number to avoid sub-pixel alignment of items. @@ -217,7 +222,9 @@ know the height of a specific row. The function takes one argument, \c row, for which the TableView needs to know the height. - \note The height of a row must always be greater than \c 0. + Since Qt 5.13, if you want to hide a specific row, you can return \c 0 height for + that row. If you return a negative number, TableView will fall back to + calculate the height based on the delegate items. \sa columnWidthProvider, {Row heights and column widths} */ @@ -230,7 +237,9 @@ to know the width of a specific column. The function takes one argument, \c column, for which the TableView needs to know the width. - \note The width of a column must always be greater than \c 0. + Since Qt 5.13, if you want to hide a specific column, you can return \c 0 width for + that column. If you return a negative number, TableView will fall back to + calculate the width based on the delegate items. \sa rowHeightProvider, {Row heights and column widths} */ @@ -377,42 +386,41 @@ Q_LOGGING_CATEGORY(lcTableViewDelegateLifecycle, "qt.quick.tableview.lifecycle") #define Q_TABLEVIEW_ASSERT(cond, output) Q_ASSERT((cond) || [&](){ dumpTable(); qWarning() << "output:" << output; return false;}()) static const Qt::Edge allTableEdges[] = { Qt::LeftEdge, Qt::RightEdge, Qt::TopEdge, Qt::BottomEdge }; - -static QLine rectangleEdge(const QRect &rect, Qt::Edge tableEdge) -{ - switch (tableEdge) { - case Qt::LeftEdge: - return QLine(rect.topLeft(), rect.bottomLeft()); - case Qt::RightEdge: - return QLine(rect.topRight(), rect.bottomRight()); - case Qt::TopEdge: - return QLine(rect.topLeft(), rect.topRight()); - case Qt::BottomEdge: - return QLine(rect.bottomLeft(), rect.bottomRight()); - } - return QLine(); -} - -static QRect expandedRect(const QRect &rect, Qt::Edge edge, int increment) -{ - switch (edge) { - case Qt::LeftEdge: - return rect.adjusted(-increment, 0, 0, 0); - case Qt::RightEdge: - return rect.adjusted(0, 0, increment, 0); - case Qt::TopEdge: - return rect.adjusted(0, -increment, 0, 0); - case Qt::BottomEdge: - return rect.adjusted(0, 0, 0, increment); - } - return QRect(); -} +static const int kEdgeIndexNotSet = -2; +static const int kEdgeIndexAtEnd = -3; const QPoint QQuickTableViewPrivate::kLeft = QPoint(-1, 0); const QPoint QQuickTableViewPrivate::kRight = QPoint(1, 0); const QPoint QQuickTableViewPrivate::kUp = QPoint(0, -1); const QPoint QQuickTableViewPrivate::kDown = QPoint(0, 1); +QQuickTableViewPrivate::EdgeRange::EdgeRange() + : startIndex(kEdgeIndexNotSet) + , endIndex(kEdgeIndexNotSet) + , size(0) +{} + +bool QQuickTableViewPrivate::EdgeRange::containsIndex(Qt::Edge edge, int index) +{ + if (startIndex == kEdgeIndexNotSet) + return false; + + if (endIndex == kEdgeIndexAtEnd) { + switch (edge) { + case Qt::LeftEdge: + case Qt::TopEdge: + return index <= startIndex; + case Qt::RightEdge: + case Qt::BottomEdge: + return index >= startIndex; + } + } + + const int s = std::min(startIndex, endIndex); + const int e = std::max(startIndex, endIndex); + return index >= s && index <= e; +} + QQuickTableViewPrivate::QQuickTableViewPrivate() : QQuickFlickablePrivate() { @@ -428,8 +436,8 @@ QQuickTableViewPrivate::~QQuickTableViewPrivate() QString QQuickTableViewPrivate::tableLayoutToString() const { return QString(QLatin1String("table cells: (%1,%2) -> (%3,%4), item count: %5, table rect: %6,%7 x %8,%9")) - .arg(loadedTable.topLeft().x()).arg(loadedTable.topLeft().y()) - .arg(loadedTable.bottomRight().x()).arg(loadedTable.bottomRight().y()) + .arg(leftColumn()).arg(topRow()) + .arg(rightColumn()).arg(bottomRow()) .arg(loadedItems.count()) .arg(loadedTableOuterRect.x()) .arg(loadedTableOuterRect.y()) @@ -479,6 +487,118 @@ QPoint QQuickTableViewPrivate::cellAtModelIndex(int modelIndex) const return QPoint(column, row); } +int QQuickTableViewPrivate::edgeToArrayIndex(Qt::Edge edge) +{ + return int(log2(float(edge))); +} + +void QQuickTableViewPrivate::clearEdgeSizeCache() +{ + cachedColumnWidth.startIndex = kEdgeIndexNotSet; + cachedRowHeight.startIndex = kEdgeIndexNotSet; + + for (Qt::Edge edge : allTableEdges) + cachedNextVisibleEdgeIndex[edgeToArrayIndex(edge)].startIndex = kEdgeIndexNotSet; +} + +int QQuickTableViewPrivate::nextVisibleEdgeIndexAroundLoadedTable(Qt::Edge edge) +{ + // Find the next column (or row) around the loaded table that is + // visible, and should be loaded next if the content item moves. + int startIndex = -1; + switch (edge) { + case Qt::LeftEdge: startIndex = loadedColumns.firstKey() - 1; break; + case Qt::RightEdge: startIndex = loadedColumns.lastKey() + 1; break; + case Qt::TopEdge: startIndex = loadedRows.firstKey() - 1; break; + case Qt::BottomEdge: startIndex = loadedRows.lastKey() + 1; break; + } + + return nextVisibleEdgeIndex(edge, startIndex); +} + +int QQuickTableViewPrivate::nextVisibleEdgeIndex(Qt::Edge edge, int startIndex) +{ + // First check if we have already searched for the first visible index + // after the given startIndex recently, and if so, return the cached result. + // The cached result is valid if startIndex is inside the range between the + // startIndex and the first visible index found after it. + auto &cachedResult = cachedNextVisibleEdgeIndex[edgeToArrayIndex(edge)]; + if (cachedResult.containsIndex(edge, startIndex)) + return cachedResult.endIndex; + + // Search for the first column (or row) in the direction of edge that is + // visible, starting from the given column (startIndex). + int foundIndex = kEdgeIndexNotSet; + int testIndex = startIndex; + + switch (edge) { + case Qt::LeftEdge: { + forever { + if (testIndex < 0) { + foundIndex = kEdgeIndexAtEnd; + break; + } + + if (!isColumnHidden(testIndex)) { + foundIndex = testIndex; + break; + } + + --testIndex; + } + break; } + case Qt::RightEdge: { + forever { + if (testIndex > tableSize.width() - 1) { + foundIndex = kEdgeIndexAtEnd; + break; + } + + if (!isColumnHidden(testIndex)) { + foundIndex = testIndex; + break; + } + + ++testIndex; + } + break; } + case Qt::TopEdge: { + forever { + if (testIndex < 0) { + foundIndex = kEdgeIndexAtEnd; + break; + } + + if (!isRowHidden(testIndex)) { + foundIndex = testIndex; + break; + } + + --testIndex; + } + break; } + case Qt::BottomEdge: { + forever { + if (testIndex > tableSize.height() - 1) { + foundIndex = kEdgeIndexAtEnd; + break; + } + + if (!isRowHidden(testIndex)) { + foundIndex = testIndex; + break; + } + + ++testIndex; + } + break; } + } + + cachedResult.startIndex = startIndex; + cachedResult.endIndex = foundIndex; + return foundIndex; +} + void QQuickTableViewPrivate::updateContentWidth() { Q_Q(QQuickTableView); @@ -489,31 +609,13 @@ void QQuickTableViewPrivate::updateContentWidth() return; } - const qreal thresholdBeforeAdjust = 0.1; - int currentRightColumn = loadedTable.right(); - - if (currentRightColumn > contentSizeBenchMarkPoint.x()) { - contentSizeBenchMarkPoint.setX(currentRightColumn); - - const qreal spacing = currentRightColumn * cellSpacing.width(); - qreal currentWidth = loadedTableOuterRect.right(); - const qreal averageCellWidth = (currentWidth - spacing) / (currentRightColumn + 1); - qreal estimatedWidth = (tableSize.width() * (averageCellWidth + cellSpacing.width())) - cellSpacing.width(); - - if (currentRightColumn >= tableSize.width() - 1) { - // We are at the last column, and can set the exact width - if (!qFuzzyCompare(currentWidth, q->implicitWidth())) - q->QQuickFlickable::setContentWidth(currentWidth); - } else if (currentWidth >= q->implicitWidth()) { - // We are at the estimated width, but there are still more columns - q->QQuickFlickable::setContentWidth(estimatedWidth); - } else { - // Only set a new width if the new estimate is substantially different - qreal diff = 1 - (estimatedWidth / q->implicitWidth()); - if (qAbs(diff) > thresholdBeforeAdjust) - q->QQuickFlickable::setContentWidth(estimatedWidth); - } - } + const int nextColumn = nextVisibleEdgeIndexAroundLoadedTable(Qt::RightEdge); + const int columnsRemaining = nextColumn == kEdgeIndexAtEnd ? 0 : tableSize.width() - nextColumn; + const qreal remainingColumnWidths = columnsRemaining * averageEdgeSize.width(); + const qreal remainingSpacing = columnsRemaining * cellSpacing.width(); + const qreal estimatedRemainingWidth = remainingColumnWidths + remainingSpacing; + const qreal estimatedWidth = loadedTableOuterRect.right() + estimatedRemainingWidth; + q->QQuickFlickable::setContentWidth(estimatedWidth); } void QQuickTableViewPrivate::updateContentHeight() @@ -526,31 +628,13 @@ void QQuickTableViewPrivate::updateContentHeight() return; } - const qreal thresholdBeforeAdjust = 0.1; - int currentBottomRow = loadedTable.bottom(); - - if (currentBottomRow > contentSizeBenchMarkPoint.y()) { - contentSizeBenchMarkPoint.setY(currentBottomRow); - - const qreal spacing = currentBottomRow * cellSpacing.height(); - qreal currentHeight = loadedTableOuterRect.bottom(); - const qreal averageCellHeight = (currentHeight - spacing) / (currentBottomRow + 1); - qreal estimatedHeight = (tableSize.height() * (averageCellHeight + cellSpacing.height())) - cellSpacing.height(); - - if (currentBottomRow >= tableSize.height() - 1) { - // We are at the last row, and can set the exact height - if (!qFuzzyCompare(currentHeight, q->implicitHeight())) - q->QQuickFlickable::setContentHeight(currentHeight); - } else if (currentHeight >= q->implicitHeight()) { - // We are at the estimated height, but there are still more rows - q->QQuickFlickable::setContentHeight(estimatedHeight); - } else { - // Only set a new height if the new estimate is substantially different - qreal diff = 1 - (estimatedHeight / q->implicitHeight()); - if (qAbs(diff) > thresholdBeforeAdjust) - q->QQuickFlickable::setContentHeight(estimatedHeight); - } - } + const int nextRow = nextVisibleEdgeIndexAroundLoadedTable(Qt::BottomEdge); + const int rowsRemaining = nextRow == kEdgeIndexAtEnd ? 0 : tableSize.height() - nextRow; + const qreal remainingRowHeights = rowsRemaining * averageEdgeSize.height(); + const qreal remainingSpacing = rowsRemaining * cellSpacing.height(); + const qreal estimatedRemainingHeight = remainingRowHeights + remainingSpacing; + const qreal estimatedHeight = loadedTableOuterRect.bottom() + estimatedRemainingHeight; + q->QQuickFlickable::setContentHeight(estimatedHeight); } void QQuickTableViewPrivate::enforceTableAtOrigin() @@ -562,24 +646,36 @@ void QQuickTableViewPrivate::enforceTableAtOrigin() bool layoutNeeded = false; const qreal flickMargin = 50; - if (loadedTable.x() == 0 && loadedTableOuterRect.x() > 0) { - // The table is at the beginning, but not at the edge of the - // content view. So move the table to origin. - loadedTableOuterRect.moveLeft(0); - layoutNeeded = true; - } else if (loadedTableOuterRect.x() < 0) { - // The table is outside the beginning of the content view. Move - // the whole table inside, and make some room for flicking. - loadedTableOuterRect.moveLeft(loadedTable.x() == 0 ? 0 : flickMargin); - layoutNeeded = true; + const bool noMoreColumns = nextVisibleEdgeIndexAroundLoadedTable(Qt::LeftEdge) == kEdgeIndexAtEnd; + const bool noMoreRows = nextVisibleEdgeIndexAroundLoadedTable(Qt::TopEdge) == kEdgeIndexAtEnd; + + if (noMoreColumns) { + if (!qFuzzyIsNull(loadedTableOuterRect.left())) { + // There are no more columns, but the table rect + // is not at origin. So we move it there. + loadedTableOuterRect.moveLeft(0); + layoutNeeded = true; + } + } else { + if (loadedTableOuterRect.left() <= 0) { + // The table rect is at origin, or outside. But we still have + // more visible columns to the left. So we need to make some + // space so that they can be flicked in. + loadedTableOuterRect.moveLeft(flickMargin); + layoutNeeded = true; + } } - if (loadedTable.y() == 0 && loadedTableOuterRect.y() > 0) { - loadedTableOuterRect.moveTop(0); - layoutNeeded = true; - } else if (loadedTableOuterRect.y() < 0) { - loadedTableOuterRect.moveTop(loadedTable.y() == 0 ? 0 : flickMargin); - layoutNeeded = true; + if (noMoreRows) { + if (!qFuzzyIsNull(loadedTableOuterRect.top())) { + loadedTableOuterRect.moveTop(0); + layoutNeeded = true; + } + } else { + if (loadedTableOuterRect.top() <= 0) { + loadedTableOuterRect.moveTop(flickMargin); + layoutNeeded = true; + } } if (layoutNeeded) { @@ -590,47 +686,100 @@ void QQuickTableViewPrivate::enforceTableAtOrigin() void QQuickTableViewPrivate::updateAverageEdgeSize() { - int bottomCell = loadedTable.bottom(); - int rightCell = loadedTable.right(); - qreal accRowSpacing = bottomCell * cellSpacing.height(); - qreal accColumnSpacing = rightCell * cellSpacing.width(); - averageEdgeSize.setHeight((loadedTableOuterRect.bottom() - accRowSpacing) / (bottomCell + 1)); - averageEdgeSize.setWidth((loadedTableOuterRect.right() - accColumnSpacing) / (rightCell + 1)); + const int loadedRowCount = loadedRows.count(); + const int loadedColumnCount = loadedColumns.count(); + const qreal accRowSpacing = (loadedRowCount - 1) * cellSpacing.height(); + const qreal accColumnSpacing = (loadedColumnCount - 1) * cellSpacing.width(); + averageEdgeSize.setHeight((loadedTableOuterRect.height() - accRowSpacing) / loadedRowCount); + averageEdgeSize.setWidth((loadedTableOuterRect.width() - accColumnSpacing) / loadedColumnCount); } void QQuickTableViewPrivate::syncLoadedTableRectFromLoadedTable() { - QRectF topLeftRect = loadedTableItem(loadedTable.topLeft())->geometry(); - QRectF bottomRightRect = loadedTableItem(loadedTable.bottomRight())->geometry(); - loadedTableOuterRect = topLeftRect.united(bottomRightRect); + const QPoint topLeft = QPoint(leftColumn(), topRow()); + const QPoint bottomRight = QPoint(rightColumn(), bottomRow()); + QRectF topLeftRect = loadedTableItem(topLeft)->geometry(); + QRectF bottomRightRect = loadedTableItem(bottomRight)->geometry(); + loadedTableOuterRect = QRectF(topLeftRect.topLeft(), bottomRightRect.bottomRight()); loadedTableInnerRect = QRectF(topLeftRect.bottomRight(), bottomRightRect.topLeft()); } +void QQuickTableViewPrivate::forceLayout() +{ + columnRowPositionsInvalid = true; + clearEdgeSizeCache(); + RebuildOptions rebuildOptions = RebuildOption::None; + + // Go through all columns from first to last, find the columns that used + // to be hidden and not loaded, and check if they should become visible + // (and vice versa). If there is a change, we need to rebuild. + for (int column = leftColumn(); column <= rightColumn(); ++column) { + const bool wasVisibleFromBefore = loadedColumns.contains(column); + const bool isVisibleNow = !qFuzzyIsNull(getColumnWidth(column)); + if (wasVisibleFromBefore == isVisibleNow) + continue; + + // A column changed visibility. This means that it should + // either be loaded or unloaded. So we need a rebuild. + qCDebug(lcTableViewDelegateLifecycle) << "Column" << column << "changed visibility to" << isVisibleNow; + rebuildOptions.setFlag(RebuildOption::ViewportOnly); + if (column == leftColumn()) { + // The first loaded column should now be hidden. This means that we + // need to calculate which column should now be first instead. + rebuildOptions.setFlag(RebuildOption::CalculateNewTopLeftColumn); + } + break; + } + + // Go through all rows from first to last, and do the same as above + for (int row = topRow(); row <= bottomRow(); ++row) { + const bool wasVisibleFromBefore = loadedRows.contains(row); + const bool isVisibleNow = !qFuzzyIsNull(getRowHeight(row)); + if (wasVisibleFromBefore == isVisibleNow) + continue; + + // A row changed visibility. This means that it should + // either be loaded or unloaded. So we need a rebuild. + qCDebug(lcTableViewDelegateLifecycle) << "Row" << row << "changed visibility to" << isVisibleNow; + rebuildOptions.setFlag(RebuildOption::ViewportOnly); + if (row == topRow()) + rebuildOptions.setFlag(RebuildOption::CalculateNewTopLeftRow); + break; + } + + if (rebuildOptions) + scheduleRebuildTable(rebuildOptions); + + if (polishing) { + qWarning() << "TableView::forceLayout(): Cannot do an immediate re-layout during an ongoing layout!"; + q_func()->polish(); + return; + } + + updatePolish(); +} + void QQuickTableViewPrivate::syncLoadedTableFromLoadRequest() { if (loadRequest.edge() == Qt::Edge(0)) { // No edge means we're loading the top-left item - loadedTable = QRect(loadRequest.firstCell(), loadRequest.lastCell()); + loadedColumns.insert(loadRequest.column(), 0); + loadedRows.insert(loadRequest.row(), 0); return; } switch (loadRequest.edge()) { case Qt::LeftEdge: - case Qt::TopEdge: - loadedTable.setTopLeft(loadRequest.firstCell()); - break; case Qt::RightEdge: + loadedColumns.insert(loadRequest.column(), 0); + break; + case Qt::TopEdge: case Qt::BottomEdge: - loadedTable.setBottomRight(loadRequest.lastCell()); + loadedRows.insert(loadRequest.row(), 0); break; } } -FxTableItem *QQuickTableViewPrivate::itemNextTo(const FxTableItem *fxTableItem, const QPoint &direction) const -{ - return loadedTableItem(fxTableItem->cell + direction); -} - FxTableItem *QQuickTableViewPrivate::loadedTableItem(const QPoint &cell) const { const int modelIndex = modelIndexAtCell(cell); @@ -762,39 +911,16 @@ void QQuickTableViewPrivate::unloadItem(const QPoint &cell) releaseItem(loadedItems.take(modelIndex), reusableFlag); } -void QQuickTableViewPrivate::unloadItems(const QLine &items) -{ - qCDebug(lcTableViewDelegateLifecycle) << items; - - if (items.dx()) { - int y = items.p1().y(); - for (int x = items.p1().x(); x <= items.p2().x(); ++x) - unloadItem(QPoint(x, y)); - } else { - int x = items.p1().x(); - for (int y = items.p1().y(); y <= items.p2().y(); ++y) - unloadItem(QPoint(x, y)); - } -} - bool QQuickTableViewPrivate::canLoadTableEdge(Qt::Edge tableEdge, const QRectF fillRect) const { switch (tableEdge) { case Qt::LeftEdge: - if (loadedTable.topLeft().x() == 0) - return false; return loadedTableOuterRect.left() > fillRect.left() + cellSpacing.width(); case Qt::RightEdge: - if (loadedTable.bottomRight().x() >= tableSize.width() - 1) - return false; return loadedTableOuterRect.right() < fillRect.right() - cellSpacing.width(); case Qt::TopEdge: - if (loadedTable.topLeft().y() == 0) - return false; return loadedTableOuterRect.top() > fillRect.top() + cellSpacing.height(); case Qt::BottomEdge: - if (loadedTable.bottomRight().y() >= tableSize.height() - 1) - return false; return loadedTableOuterRect.bottom() < fillRect.bottom() - cellSpacing.height(); } @@ -807,19 +933,19 @@ bool QQuickTableViewPrivate::canUnloadTableEdge(Qt::Edge tableEdge, const QRectF // they are needed as anchor point for further layouting. switch (tableEdge) { case Qt::LeftEdge: - if (loadedTable.width() <= 1) + if (loadedColumns.count() <= 1) return false; return loadedTableInnerRect.left() <= fillRect.left(); case Qt::RightEdge: - if (loadedTable.width() <= 1) + if (loadedColumns.count() <= 1) return false; return loadedTableInnerRect.right() >= fillRect.right(); case Qt::TopEdge: - if (loadedTable.height() <= 1) + if (loadedRows.count() <= 1) return false; return loadedTableInnerRect.top() <= fillRect.top(); case Qt::BottomEdge: - if (loadedTable.height() <= 1) + if (loadedRows.count() <= 1) return false; return loadedTableInnerRect.bottom() >= fillRect.bottom(); } @@ -830,9 +956,14 @@ bool QQuickTableViewPrivate::canUnloadTableEdge(Qt::Edge tableEdge, const QRectF Qt::Edge QQuickTableViewPrivate::nextEdgeToLoad(const QRectF rect) { for (Qt::Edge edge : allTableEdges) { - if (canLoadTableEdge(edge, rect)) - return edge; + if (!canLoadTableEdge(edge, rect)) + continue; + const int nextIndex = nextVisibleEdgeIndexAroundLoadedTable(edge); + if (nextIndex == kEdgeIndexAtEnd) + continue; + return edge; } + return Qt::Edge(0); } @@ -865,8 +996,10 @@ qreal QQuickTableViewPrivate::sizeHintForColumn(int column) { // Find the widest cell in the column, and return its width qreal columnWidth = 0; - for (int row = loadedTable.top(); row <= loadedTable.bottom(); ++row) + for (auto r = loadedRows.cbegin(); r != loadedRows.cend(); ++r) { + const int row = r.key(); columnWidth = qMax(columnWidth, cellWidth(QPoint(column, row))); + } return columnWidth; } @@ -875,8 +1008,10 @@ qreal QQuickTableViewPrivate::sizeHintForRow(int row) { // Find the highest cell in the row, and return its height qreal rowHeight = 0; - for (int column = loadedTable.left(); column <= loadedTable.right(); ++column) + for (auto c = loadedColumns.cbegin(); c != loadedColumns.cend(); ++c) { + const int column = c.key(); rowHeight = qMax(rowHeight, cellHeight(QPoint(column, row))); + } return rowHeight; } @@ -901,102 +1036,152 @@ void QQuickTableViewPrivate::calculateTableSize() emit q->rowsChanged(); } -qreal QQuickTableViewPrivate::resolveColumnWidth(int column) -{ - Q_TABLEVIEW_ASSERT(column >= loadedTable.left() && column <= loadedTable.right(), column); - qreal columnWidth = -1; +qreal QQuickTableViewPrivate::getColumnLayoutWidth(int column) +{ + // Return the column width specified by the application, or go + // through the loaded items and calculate it as a fallback. For + // layouting, the width can never be zero (or negative), as this + // can lead us to be stuck in an infinite loop trying to load and + // fill out the empty viewport space with empty columns. + const qreal explicitColumnWidth = getColumnWidth(column); + if (explicitColumnWidth >= 0) + return explicitColumnWidth; + + // Iterate over the currently visible items in the column. The downside + // of doing that, is that the column width will then only be based on the implicit + // width of the currently loaded items (which can be different depending on which + // row you're at when the column is flicked in). The upshot is that you don't have to + // bother setting columnWidthProvider for small tables, or if the implicit width doesn't vary. + qreal columnWidth = sizeHintForColumn(column); + + if (qIsNaN(columnWidth) || columnWidth <= 0) { + if (!layoutWarningIssued) { + layoutWarningIssued = true; + qmlWarning(q_func()) << "the delegate's implicitHeight needs to be greater than zero"; + } + columnWidth = kDefaultRowHeight; + } - if (!columnWidthProvider.isUndefined()) { - if (columnWidthProvider.isCallable()) { - auto const columnAsArgument = QJSValueList() << QJSValue(column); - columnWidth = columnWidthProvider.call(columnAsArgument).toNumber(); - if (qIsNaN(columnWidth) || columnWidth <= 0) { - // The column width needs to be greater than 0, otherwise we never reach the edge - // while loading/refilling columns. This would cause the application to hang. - if (!layoutWarningIssued) { - layoutWarningIssued = true; - qmlWarning(q_func()) << "columnWidthProvider did not return a valid width for column: " << column; - } - columnWidth = kDefaultColumnWidth; - } - } else { - if (!layoutWarningIssued) { - layoutWarningIssued = true; - qmlWarning(q_func()) << "columnWidthProvider doesn't contain a function"; - } - columnWidth = kDefaultColumnWidth; + return columnWidth; +} + +qreal QQuickTableViewPrivate::getRowLayoutHeight(int row) +{ + // Return the row height specified by the application, or go + // through the loaded items and calculate it as a fallback. For + // layouting, the height can never be zero (or negative), as this + // can lead us to be stuck in an infinite loop trying to load and + // fill out the empty viewport space with empty rows. + const qreal explicitRowHeight = getRowHeight(row); + if (explicitRowHeight >= 0) + return explicitRowHeight; + + // Iterate over the currently visible items in the row. The downside + // of doing that, is that the row height will then only be based on the implicit + // height of the currently loaded items (which can be different depending on which + // column you're at when the row is flicked in). The upshot is that you don't have to + // bother setting rowHeightProvider for small tables, or if the implicit height doesn't vary. + qreal rowHeight = sizeHintForRow(row); + + if (qIsNaN(rowHeight) || rowHeight <= 0) { + if (!layoutWarningIssued) { + layoutWarningIssued = true; + qmlWarning(q_func()) << "the delegate's implicitHeight needs to be greater than zero"; } + rowHeight = kDefaultRowHeight; + } + + return rowHeight; +} + +qreal QQuickTableViewPrivate::getColumnWidth(int column) +{ + // Return the width of the given column, if explicitly set. Return 0 if the column + // is hidden, and -1 if the width is not set (which means that the width should + // instead be calculated from the implicit size of the delegate items. This function + // can be overridden by e.g HeaderView to provide the column widths by other means. + const int noExplicitColumnWidth = -1; + + if (cachedColumnWidth.startIndex == column) + return cachedColumnWidth.size; + + if (columnWidthProvider.isUndefined()) + return noExplicitColumnWidth; + + qreal columnWidth = noExplicitColumnWidth; + + if (columnWidthProvider.isCallable()) { + auto const columnAsArgument = QJSValueList() << QJSValue(column); + columnWidth = columnWidthProvider.call(columnAsArgument).toNumber(); + if (qIsNaN(columnWidth) || columnWidth < 0) + columnWidth = noExplicitColumnWidth; } else { - // If columnWidthProvider is left unspecified, we just iterate over the currently visible items in - // the column. The downside of doing that, is that the column width will then only be based - // on the implicit width of the currently loaded items (which can be different depending on - // which row you're at when the column is flicked in). The upshot is that you don't have to - // bother setting columnWidthProvider for small tables, or if the implicit width doesn't vary. - columnWidth = sizeHintForColumn(column); - if (qIsNaN(columnWidth) || columnWidth <= 0) { - // The column width needs to be greater than 0, otherwise we never reach the edge - // while loading/refilling columns. This would cause the application to hang. - if (!layoutWarningIssued) { - layoutWarningIssued = true; - qmlWarning(q_func()) << "the delegate's implicitWidth needs to be greater than zero"; - } - columnWidth = kDefaultColumnWidth; + if (!layoutWarningIssued) { + layoutWarningIssued = true; + qmlWarning(q_func()) << "columnWidthProvider doesn't contain a function"; } + columnWidth = noExplicitColumnWidth; } + cachedColumnWidth.startIndex = column; + cachedColumnWidth.size = columnWidth; return columnWidth; } -qreal QQuickTableViewPrivate::resolveRowHeight(int row) +qreal QQuickTableViewPrivate::getRowHeight(int row) { - Q_TABLEVIEW_ASSERT(row >= loadedTable.top() && row <= loadedTable.bottom(), row); - qreal rowHeight = -1; + // Return the height of the given row, if explicitly set. Return 0 if the row + // is hidden, and -1 if the height is not set (which means that the height should + // instead be calculated from the implicit size of the delegate items. This function + // can be overridden by e.g HeaderView to provide the row heights by other means. + const int noExplicitRowHeight = -1; - if (!rowHeightProvider.isUndefined()) { - if (rowHeightProvider.isCallable()) { - auto const rowAsArgument = QJSValueList() << QJSValue(row); - rowHeight = rowHeightProvider.call(rowAsArgument).toNumber(); - if (qIsNaN(rowHeight) || rowHeight <= 0) { - // The row height needs to be greater than 0, otherwise we never reach the edge - // while loading/refilling rows. This would cause the application to hang. - if (!layoutWarningIssued) { - layoutWarningIssued = true; - qmlWarning(q_func()) << "rowHeightProvider did not return a valid height for row: " << row; - } - rowHeight = kDefaultRowHeight; - } - } else { - if (!layoutWarningIssued) { - layoutWarningIssued = true; - qmlWarning(q_func()) << "rowHeightProvider doesn't contain a function"; - } - rowHeight = kDefaultRowHeight; - } + if (cachedRowHeight.startIndex == row) + return cachedRowHeight.size; + + if (rowHeightProvider.isUndefined()) + return noExplicitRowHeight; + + qreal rowHeight = noExplicitRowHeight; + + if (rowHeightProvider.isCallable()) { + auto const rowAsArgument = QJSValueList() << QJSValue(row); + rowHeight = rowHeightProvider.call(rowAsArgument).toNumber(); + if (qIsNaN(rowHeight) || rowHeight < 0) + rowHeight = noExplicitRowHeight; } else { - // If rowHeightProvider is left unspecified, we just iterate over the currently visible items in - // the row. The downside of doing that, is that the row height will then only be based - // on the implicit height of the currently loaded items (which can be different depending on - // which column you're at when the row is flicked in). The upshot is that you don't have to - // bother setting rowHeightProvider for small tables, or if the implicit height doesn't vary. - rowHeight = sizeHintForRow(row); - if (qIsNaN(rowHeight) || rowHeight <= 0) { - if (!layoutWarningIssued) { - layoutWarningIssued = true; - qmlWarning(q_func()) << "the delegate's implicitHeight needs to be greater than zero"; - } - rowHeight = kDefaultRowHeight; + if (!layoutWarningIssued) { + layoutWarningIssued = true; + qmlWarning(q_func()) << "rowHeightProvider doesn't contain a function"; } + rowHeight = noExplicitRowHeight; } + cachedRowHeight.startIndex = row; + cachedRowHeight.size = rowHeight; return rowHeight; } +bool QQuickTableViewPrivate::isColumnHidden(int column) +{ + // A column is hidden if the width is explicit set to zero (either by + // using a columnWidthProvider, or by overriding getColumnWidth()). + return qFuzzyIsNull(getColumnWidth(column)); +} + +bool QQuickTableViewPrivate::isRowHidden(int row) +{ + // A row is hidden if the height is explicit set to zero (either by + // using a rowHeightProvider, or by overriding getRowHeight()). + return qFuzzyIsNull(getRowHeight(row)); +} + void QQuickTableViewPrivate::relayoutTable() { + clearEdgeSizeCache(); relayoutTableItems(); syncLoadedTableRectFromLoadedTable(); enforceTableAtOrigin(); - contentSizeBenchMarkPoint = QPoint(-1, -1); updateContentWidth(); updateContentHeight(); // Return back to updatePolish to loadAndUnloadVisibleEdges() @@ -1012,11 +1197,13 @@ void QQuickTableViewPrivate::relayoutTableItems() qreal nextColumnX = loadedTableOuterRect.x(); qreal nextRowY = loadedTableOuterRect.y(); - for (int column = loadedTable.left(); column <= loadedTable.right(); ++column) { + for (auto c = loadedColumns.cbegin(); c != loadedColumns.cend(); ++c) { + const int column = c.key(); // Adjust the geometry of all cells in the current column - const qreal width = resolveColumnWidth(column); + const qreal width = getColumnLayoutWidth(column); - for (int row = loadedTable.top(); row <= loadedTable.bottom(); ++row) { + for (auto r = loadedRows.cbegin(); r != loadedRows.cend(); ++r) { + const int row = r.key(); auto item = loadedTableItem(QPoint(column, row)); QRectF geometry = item->geometry(); geometry.moveLeft(nextColumnX); @@ -1024,14 +1211,17 @@ void QQuickTableViewPrivate::relayoutTableItems() item->setGeometry(geometry); } - nextColumnX += width + cellSpacing.width(); + if (width > 0) + nextColumnX += width + cellSpacing.width(); } - for (int row = loadedTable.top(); row <= loadedTable.bottom(); ++row) { + for (auto r = loadedRows.cbegin(); r != loadedRows.cend(); ++r) { + const int row = r.key(); // Adjust the geometry of all cells in the current row - const qreal height = resolveRowHeight(row); + const qreal height = getRowLayoutHeight(row); - for (int column = loadedTable.left(); column <= loadedTable.right(); ++column) { + for (auto c = loadedColumns.cbegin(); c != loadedColumns.cend(); ++c) { + const int column = c.key(); auto item = loadedTableItem(QPoint(column, row)); QRectF geometry = item->geometry(); geometry.moveTop(nextRowY); @@ -1039,12 +1229,15 @@ void QQuickTableViewPrivate::relayoutTableItems() item->setGeometry(geometry); } - nextRowY += height + cellSpacing.height(); + if (height > 0) + nextRowY += height + cellSpacing.height(); } if (Q_UNLIKELY(lcTableViewDelegateLifecycle().isDebugEnabled())) { - for (int column = loadedTable.left(); column <= loadedTable.right(); ++column) { - for (int row = loadedTable.top(); row <= loadedTable.bottom(); ++row) { + for (auto c = loadedColumns.cbegin(); c != loadedColumns.cend(); ++c) { + const int column = c.key(); + for (auto r = loadedRows.cbegin(); r != loadedRows.cend(); ++r) { + const int row = r.key(); QPoint cell = QPoint(column, row); qCDebug(lcTableViewDelegateLifecycle()) << "relayout item:" << cell << loadedTableItem(cell)->geometry(); } @@ -1054,66 +1247,82 @@ void QQuickTableViewPrivate::relayoutTableItems() void QQuickTableViewPrivate::layoutVerticalEdge(Qt::Edge tableEdge) { - int column = (tableEdge == Qt::LeftEdge) ? loadedTable.left() : loadedTable.right(); - QPoint neighbourDirection = (tableEdge == Qt::LeftEdge) ? kRight : kLeft; - qreal width = resolveColumnWidth(column); - - for (int row = loadedTable.top(); row <= loadedTable.bottom(); ++row) { - auto fxTableItem = loadedTableItem(QPoint(column, row)); - auto const neighbourItem = itemNextTo(fxTableItem, neighbourDirection); - - QRectF geometry = fxTableItem->geometry(); - geometry.setWidth(width); - geometry.setHeight(neighbourItem->geometry().height()); - qreal left = tableEdge == Qt::LeftEdge ? - neighbourItem->geometry().left() - cellSpacing.width() - geometry.width() : - neighbourItem->geometry().right() + cellSpacing.width(); + int columnThatNeedsLayout; + int neighbourColumn; + qreal columnX; + qreal columnWidth; + + if (tableEdge == Qt::LeftEdge) { + columnThatNeedsLayout = leftColumn(); + neighbourColumn = loadedColumns.keys().value(1); + columnWidth = getColumnLayoutWidth(columnThatNeedsLayout); + const auto neighbourItem = loadedTableItem(QPoint(neighbourColumn, topRow())); + columnX = neighbourItem->geometry().left() - cellSpacing.width() - columnWidth; + } else { + columnThatNeedsLayout = rightColumn(); + neighbourColumn = loadedColumns.keys().value(loadedColumns.count() - 2); + columnWidth = getColumnLayoutWidth(columnThatNeedsLayout); + const auto neighbourItem = loadedTableItem(QPoint(neighbourColumn, topRow())); + columnX = neighbourItem->geometry().right() + cellSpacing.width(); + } - geometry.moveLeft(left); - geometry.moveTop(neighbourItem->geometry().top()); + for (auto r = loadedRows.cbegin(); r != loadedRows.cend(); ++r) { + const int row = r.key(); + auto fxTableItem = loadedTableItem(QPoint(columnThatNeedsLayout, row)); + auto const neighbourItem = loadedTableItem(QPoint(neighbourColumn, row)); + const qreal rowY = neighbourItem->geometry().y(); + const qreal rowHeight = neighbourItem->geometry().height(); - fxTableItem->setGeometry(geometry); + fxTableItem->setGeometry(QRectF(columnX, rowY, columnWidth, rowHeight)); fxTableItem->setVisible(true); - qCDebug(lcTableViewDelegateLifecycle()) << "layout item:" << QPoint(column, row) << fxTableItem->geometry(); + qCDebug(lcTableViewDelegateLifecycle()) << "layout item:" << QPoint(columnThatNeedsLayout, row) << fxTableItem->geometry(); } } void QQuickTableViewPrivate::layoutHorizontalEdge(Qt::Edge tableEdge) { - int row = (tableEdge == Qt::TopEdge) ? loadedTable.top() : loadedTable.bottom(); - QPoint neighbourDirection = (tableEdge == Qt::TopEdge) ? kDown : kUp; - qreal height = resolveRowHeight(row); - - for (int column = loadedTable.left(); column <= loadedTable.right(); ++column) { - auto fxTableItem = loadedTableItem(QPoint(column, row)); - auto const neighbourItem = itemNextTo(fxTableItem, neighbourDirection); - - QRectF geometry = fxTableItem->geometry(); - geometry.setWidth(neighbourItem->geometry().width()); - geometry.setHeight(height); - qreal top = tableEdge == Qt::TopEdge ? - neighbourItem->geometry().top() - cellSpacing.height() - geometry.height() : - neighbourItem->geometry().bottom() + cellSpacing.height(); + int rowThatNeedsLayout; + int neighbourRow; + qreal rowY; + qreal rowHeight; + + if (tableEdge == Qt::TopEdge) { + rowThatNeedsLayout = topRow(); + neighbourRow = loadedRows.keys().value(1); + rowHeight = getRowLayoutHeight(rowThatNeedsLayout); + const auto neighbourItem = loadedTableItem(QPoint(leftColumn(), neighbourRow)); + rowY = neighbourItem->geometry().top() - cellSpacing.height() - rowHeight; + } else { + rowThatNeedsLayout = bottomRow(); + neighbourRow = loadedRows.keys().value(loadedRows.count() - 2); + rowHeight = getRowLayoutHeight(rowThatNeedsLayout); + const auto neighbourItem = loadedTableItem(QPoint(leftColumn(), neighbourRow)); + rowY = neighbourItem->geometry().bottom() + cellSpacing.height(); + } - geometry.moveTop(top); - geometry.moveLeft(neighbourItem->geometry().left()); + for (auto c = loadedColumns.cbegin(); c != loadedColumns.cend(); ++c) { + const int column = c.key(); + auto fxTableItem = loadedTableItem(QPoint(column, rowThatNeedsLayout)); + auto const neighbourItem = loadedTableItem(QPoint(column, neighbourRow)); + const qreal columnX = neighbourItem->geometry().x(); + const qreal columnWidth = neighbourItem->geometry().width(); - fxTableItem->setGeometry(geometry); + fxTableItem->setGeometry(QRectF(columnX, rowY, columnWidth, rowHeight)); fxTableItem->setVisible(true); - qCDebug(lcTableViewDelegateLifecycle()) << "layout item:" << QPoint(column, row) << fxTableItem->geometry(); + qCDebug(lcTableViewDelegateLifecycle()) << "layout item:" << QPoint(column, rowThatNeedsLayout) << fxTableItem->geometry(); } } void QQuickTableViewPrivate::layoutTopLeftItem() { - const QPoint cell = loadRequest.firstCell(); + const QPoint cell(loadRequest.column(), loadRequest.row()); auto topLeftItem = loadedTableItem(cell); auto item = topLeftItem->item; item->setPosition(loadRequest.startPosition()); - item->setSize(QSizeF(resolveColumnWidth(cell.x()), resolveRowHeight(cell.y()))); + item->setSize(QSizeF(getColumnLayoutWidth(cell.x()), getRowLayoutHeight(cell.y()))); topLeftItem->setVisible(true); qCDebug(lcTableViewDelegateLifecycle) << "geometry:" << topLeftItem->geometry(); } @@ -1138,29 +1347,6 @@ void QQuickTableViewPrivate::layoutTableEdgeFromLoadRequest() } } -void QQuickTableViewPrivate::cancelLoadRequest() -{ - loadRequest.markAsDone(); - model->cancel(modelIndexAtCell(loadRequest.currentCell())); - - if (rebuildScheduled) { - // No reason to rollback already loaded edge items - // since we anyway are about to reload all items. - return; - } - - if (loadRequest.atBeginning()) { - // No items have yet been loaded, so nothing to unload - return; - } - - QLine rollbackItems; - rollbackItems.setP1(loadRequest.firstCell()); - rollbackItems.setP2(loadRequest.previousCell()); - qCDebug(lcTableViewDelegateLifecycle()) << "rollback:" << rollbackItems << tableLayoutToString(); - unloadItems(rollbackItems); -} - void QQuickTableViewPrivate::processLoadRequest() { Q_TABLEVIEW_ASSERT(loadRequest.isActive(), ""); @@ -1186,9 +1372,22 @@ void QQuickTableViewPrivate::processLoadRequest() syncLoadedTableRectFromLoadedTable(); if (rebuildState == RebuildState::Done) { - enforceTableAtOrigin(); - updateContentWidth(); - updateContentHeight(); + // Loading of this edge was not done as a part of a rebuild, but + // instead as an incremental build after e.g a flick. + switch (loadRequest.edge()) { + case Qt::LeftEdge: + case Qt::TopEdge: + enforceTableAtOrigin(); + break; + case Qt::RightEdge: + updateAverageEdgeSize(); + updateContentWidth(); + break; + case Qt::BottomEdge: + updateAverageEdgeSize(); + updateContentHeight(); + break; + } drainReusePoolAfterLoadRequest(); } @@ -1209,7 +1408,7 @@ void QQuickTableViewPrivate::processRebuildTable() if (rebuildState == RebuildState::VerifyTable) { if (loadedItems.isEmpty()) { - qCDebug(lcTableViewDelegateLifecycle()) << "no items loaded, meaning empty model or no delegate"; + qCDebug(lcTableViewDelegateLifecycle()) << "no items loaded, meaning empty model, all rows or columns hidden, or no delegate"; rebuildState = RebuildState::Done; return; } @@ -1233,14 +1432,14 @@ void QQuickTableViewPrivate::processRebuildTable() && reusableFlag == QQmlTableInstanceModel::Reusable); if (rebuildState == RebuildState::PreloadColumns) { - if (preload && loadedTable.right() < tableSize.width() - 1) + if (preload && nextVisibleEdgeIndexAroundLoadedTable(Qt::RightEdge) != kEdgeIndexAtEnd) loadEdge(Qt::RightEdge, QQmlIncubator::AsynchronousIfNested); if (!moveToNextRebuildState()) return; } if (rebuildState == RebuildState::PreloadRows) { - if (preload && loadedTable.bottom() < tableSize.height() - 1) + if (preload && nextVisibleEdgeIndexAroundLoadedTable(Qt::BottomEdge) != kEdgeIndexAtEnd) loadEdge(Qt::BottomEdge, QQmlIncubator::AsynchronousIfNested); if (!moveToNextRebuildState()) return; @@ -1268,19 +1467,26 @@ bool QQuickTableViewPrivate::moveToNextRebuildState() return true; } -void QQuickTableViewPrivate::beginRebuildTable() +QPoint QQuickTableViewPrivate::calculateNewTopLeft() { - if (loadRequest.isActive()) - cancelLoadRequest(); + const int firstVisibleLeft = nextVisibleEdgeIndex(Qt::RightEdge, 0); + const int firstVisibleTop = nextVisibleEdgeIndex(Qt::BottomEdge, 0); - calculateTableSize(); + return QPoint(firstVisibleLeft, firstVisibleTop); +} - QPoint topLeft; - QPointF topLeftPos; +void QQuickTableViewPrivate::calculateTopLeft(QPoint &topLeft, QPointF &topLeftPos) +{ + if (tableSize.isEmpty()) { + releaseLoadedItems(QQmlTableInstanceModel::NotReusable); + topLeft = QPoint(kEdgeIndexAtEnd, kEdgeIndexAtEnd); + return; + } if (rebuildOptions & RebuildOption::All) { qCDebug(lcTableViewDelegateLifecycle()) << "RebuildOption::All"; releaseLoadedItems(QQmlTableInstanceModel::NotReusable); + topLeft = calculateNewTopLeft(); } else if (rebuildOptions & RebuildOption::ViewportOnly) { qCDebug(lcTableViewDelegateLifecycle()) << "RebuildOption::ViewportOnly"; releaseLoadedItems(reusableFlag); @@ -1290,7 +1496,7 @@ void QQuickTableViewPrivate::beginRebuildTable() topLeft.ry() = qBound(0, newRow, tableSize.height() - 1); topLeftPos.ry() = topLeft.y() * (averageEdgeSize.height() + cellSpacing.height()); } else { - topLeft.ry() = qBound(0, loadedTable.topLeft().y(), tableSize.height() - 1); + topLeft.ry() = qBound(0, topRow(), tableSize.height() - 1); topLeftPos.ry() = loadedTableOuterRect.topLeft().y(); } if (rebuildOptions & RebuildOption::CalculateNewTopLeftColumn) { @@ -1298,18 +1504,33 @@ void QQuickTableViewPrivate::beginRebuildTable() topLeft.rx() = qBound(0, newColumn, tableSize.width() - 1); topLeftPos.rx() = topLeft.x() * (averageEdgeSize.width() + cellSpacing.width()); } else { - topLeft.rx() = qBound(0, loadedTable.topLeft().x(), tableSize.width() - 1); + topLeft.rx() = qBound(0, leftColumn(), tableSize.width() - 1); topLeftPos.rx() = loadedTableOuterRect.topLeft().x(); } } else { Q_TABLEVIEW_UNREACHABLE(rebuildOptions); } +} - loadedTable = QRect(); +void QQuickTableViewPrivate::beginRebuildTable() +{ + calculateTableSize(); + + QPoint topLeft; + QPointF topLeftPos; + calculateTopLeft(topLeft, topLeftPos); + + loadedColumns.clear(); + loadedRows.clear(); loadedTableOuterRect = QRect(); loadedTableInnerRect = QRect(); - contentSizeBenchMarkPoint = QPoint(-1, -1); columnRowPositionsInvalid = false; + clearEdgeSizeCache(); + + if (topLeft.x() == kEdgeIndexAtEnd || topLeft.y() == kEdgeIndexAtEnd) { + // No visible columns or rows, so nothing to load + return; + } loadInitialTopLeftItem(topLeft, topLeftPos); loadAndUnloadVisibleEdges(); @@ -1335,12 +1556,6 @@ void QQuickTableViewPrivate::loadInitialTopLeftItem(const QPoint &cell, const QP { Q_TABLEVIEW_ASSERT(loadedItems.isEmpty(), ""); - if (tableSize.isEmpty()) - return; - - if (model->count() == 0) - return; - if (tableModel && !tableModel->delegate()) return; @@ -1352,16 +1567,42 @@ void QQuickTableViewPrivate::loadInitialTopLeftItem(const QPoint &cell, const QP void QQuickTableViewPrivate::unloadEdge(Qt::Edge edge) { - unloadItems(rectangleEdge(loadedTable, edge)); - loadedTable = expandedRect(loadedTable, edge, -1); - syncLoadedTableRectFromLoadedTable(); + qCDebug(lcTableViewDelegateLifecycle) << edge; + + switch (edge) { + case Qt::LeftEdge: + case Qt::RightEdge: { + const int column = edge == Qt::LeftEdge ? leftColumn() : rightColumn(); + for (auto r = loadedRows.cbegin(); r != loadedRows.cend(); ++r) + unloadItem(QPoint(column, r.key())); + loadedColumns.remove(column); + syncLoadedTableRectFromLoadedTable(); + updateAverageEdgeSize(); + updateContentWidth(); + break; } + case Qt::TopEdge: + case Qt::BottomEdge: { + const int row = edge == Qt::TopEdge ? topRow() : bottomRow(); + for (auto c = loadedColumns.cbegin(); c != loadedColumns.cend(); ++c) + unloadItem(QPoint(c.key(), row)); + loadedRows.remove(row); + syncLoadedTableRectFromLoadedTable(); + updateAverageEdgeSize(); + updateContentHeight(); + break; } + } + qCDebug(lcTableViewDelegateLifecycle) << tableLayoutToString(); } void QQuickTableViewPrivate::loadEdge(Qt::Edge edge, QQmlIncubator::IncubationMode incubationMode) { - QLine cellsToLoad = rectangleEdge(expandedRect(loadedTable, edge, 1), edge); - loadRequest.begin(cellsToLoad, edge, incubationMode); + const int edgeIndex = nextVisibleEdgeIndexAroundLoadedTable(edge); + qCDebug(lcTableViewDelegateLifecycle) << edge << edgeIndex; + + const QList<int> visibleCells = edge & (Qt::LeftEdge | Qt::RightEdge) + ? loadedRows.keys() : loadedColumns.keys(); + loadRequest.begin(edge, edgeIndex, visibleCells, incubationMode); processLoadRequest(); } @@ -1447,8 +1688,8 @@ void QQuickTableViewPrivate::drainReusePoolAfterLoadRequest() // in with varying sizes, causing some items not to be resued immediately), we multiply the // value by 2. Note that we also add an extra +1 to the column count, because the number of // visible columns will fluctuate between +1/-1 while flicking. - const int w = loadedTable.width(); - const int h = loadedTable.height(); + const int w = loadedColumns.count(); + const int h = loadedRows.count(); const int minTime = int(std::ceil(w > h ? qreal(w + 1) / h : qreal(h + 1) / w)); const int maxTime = minTime * 2; tableModel->drainReusableItemsPool(maxTime); @@ -1502,8 +1743,12 @@ void QQuickTableViewPrivate::updatePolish() if (loadedItems.isEmpty()) return; - if (columnRowPositionsInvalid) + if (columnRowPositionsInvalid) { relayoutTable(); + updateAverageEdgeSize(); + updateContentWidth(); + updateContentHeight(); + } loadAndUnloadVisibleEdges(); } @@ -1609,6 +1854,12 @@ void QQuickTableViewPrivate::syncRebuildOptions() rebuildOptions = scheduledRebuildOptions; scheduledRebuildOptions = RebuildOption::None; rebuildScheduled = false; + + if (loadedItems.isEmpty()) { + // If we have no items from before, we cannot just rebuild the viewport, but need + // to rebuild everything, since we have no top-left loaded item to start from. + rebuildOptions.setFlag(RebuildOption::All); + } } void QQuickTableViewPrivate::syncDelegate() @@ -1787,6 +2038,16 @@ QQuickTableView::QQuickTableView(QQuickItem *parent) setFlag(QQuickItem::ItemIsFocusScope); } +QQuickTableView::~QQuickTableView() +{ +} + +QQuickTableView::QQuickTableView(QQuickTableViewPrivate &dd, QQuickItem *parent) + : QQuickFlickable(dd, parent) +{ + setFlag(QQuickItem::ItemIsFocusScope); +} + int QQuickTableView::rows() const { return d_func()->tableSize.height(); @@ -1936,16 +2197,7 @@ void QQuickTableView::setContentHeight(qreal height) void QQuickTableView::forceLayout() { - Q_D(QQuickTableView); - d->columnRowPositionsInvalid = true; - - if (d->polishing) { - qWarning() << "TableView::forceLayout(): Cannot do an immediate re-layout during an ongoing layout!"; - polish(); - return; - } - - d->updatePolish(); + d_func()->forceLayout(); } QQuickTableViewAttached *QQuickTableView::qmlAttachedProperties(QObject *obj) |