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Also cache totalBoxes if we have HFW/WFH

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Change-Id: Iea71c11b88df84b9c0949b1020a6bcc5395d62de
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
This commit is contained in:
Jan Arve Saether 2013-12-17 14:33:21 +01:00 committed by The Qt Project
parent 718c5eafa0
commit b72880d213
2 changed files with 24 additions and 14 deletions
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26
src/gui/util/qgridlayoutengine.cpp
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@ -983,9 +983,10 @@ void QGridLayoutEngine::invalidate()
q_cachedEffectiveFirstRows[Ver] = -1;
q_cachedEffectiveLastRows[Hor] = -1;
q_cachedEffectiveLastRows[Ver] = -1;
q_totalBoxesValid = false;
q_sizeHintValid[Hor] = false;
q_sizeHintValid[Ver] = false;
q_totalBoxCachedConstraints[Hor] = NotCached;
q_totalBoxCachedConstraints[Ver] = NotCached;
q_cachedSize = QSizeF();
q_cachedConstraintOrientation = UnknownConstraint;
}
@ -1530,7 +1531,11 @@ void QGridLayoutEngine::ensureColumnAndRowData(QGridLayoutRowData *rowData, QGri
const QAbstractLayoutStyleInfo *styleInfo) const
{
const int o = (orientation == Qt::Vertical ? Ver : Hor);
if (q_sizeHintValid[o] && !colPositions && !colSizes) {
const int cc = columnCount(orientation);
const qreal constraint = (colPositions && colSizes && hasDynamicConstraint()) ? (colPositions[cc - 1] + colSizes[cc - 1]) : qreal(CachedWithNoConstraint);
qreal &cachedConstraint = q_totalBoxCachedConstraints[o];
if (cachedConstraint == constraint) {
if (totalBox != &q_totalBoxes[o])
*totalBox = q_totalBoxes[o];
return;
@ -1541,10 +1546,10 @@ void QGridLayoutEngine::ensureColumnAndRowData(QGridLayoutRowData *rowData, QGri
rowData->distributeMultiCells(rowInfo);
*totalBox = rowData->totalBox(0, rowCount(orientation));
if (!colPositions && !colSizes) {
if (totalBox != &q_totalBoxes[o])
q_totalBoxes[o] = *totalBox;
q_sizeHintValid[o] = true;
}
cachedConstraint = constraint;
}
/**
@ -1593,10 +1598,9 @@ Qt::Orientation QGridLayoutEngine::constraintOrientation() const
void QGridLayoutEngine::ensureGeometries(const QSizeF &size,
const QAbstractLayoutStyleInfo *styleInfo) const
{
if (!styleInfo->hasChanged() && q_totalBoxesValid && q_cachedSize == size)
if (!styleInfo->hasChanged() && q_cachedSize == size)
return;
q_totalBoxesValid = true;
q_cachedSize = size;
q_xx.resize(columnCount());
@ -1606,7 +1610,7 @@ void QGridLayoutEngine::ensureGeometries(const QSizeF &size,
q_descents.resize(rowCount());
if (constraintOrientation() != Qt::Horizontal) {
//We might have items whose width depends on their height
//We might have items whose height depends on their width (HFW)
ensureColumnAndRowData(&q_columnData, &q_totalBoxes[Hor], NULL, NULL, Qt::Horizontal, styleInfo);
//Calculate column widths and positions, and put results in q_xx.data() and q_widths.data() so that we can use this information as
//constraints to find the row heights
@ -1617,7 +1621,7 @@ void QGridLayoutEngine::ensureGeometries(const QSizeF &size,
q_rowData.calculateGeometries(0, rowCount(), size.height(), q_yy.data(), q_heights.data(),
q_descents.data(), q_totalBoxes[Ver], q_infos[Ver]);
} else {
//We have items whose height depends on their width
//We have items whose width depends on their height (WFH)
ensureColumnAndRowData(&q_rowData, &q_totalBoxes[Ver], NULL, NULL, Qt::Vertical, styleInfo);
//Calculate row heights and positions, and put results in q_yy.data() and q_heights.data() so that we can use this information as
//constraints to find the column widths

12
src/gui/util/qgridlayoutengine_p.h
View File

@ -450,15 +450,21 @@ private:
mutable int q_cachedEffectiveLastRows[NOrientations];
mutable quint8 q_cachedConstraintOrientation : 3;
// this is useful to cache
mutable QGridLayoutBox q_totalBoxes[NOrientations];
enum {
NotCached = -2, // Cache is empty. Happens when the engine is invalidated.
CachedWithNoConstraint = -1 // cache has a totalBox without any HFW/WFH constraints.
// >= 0 // cache has a totalBox with this specific constraint.
};
mutable qreal q_totalBoxCachedConstraints[NOrientations]; // holds the constraint used for the cached totalBox
// Layout item input
mutable QGridLayoutRowData q_columnData;
mutable QGridLayoutRowData q_rowData;
mutable QGridLayoutBox q_totalBoxes[NOrientations];
// Output
mutable QSizeF q_cachedSize;
mutable bool q_totalBoxesValid;
mutable bool q_sizeHintValid[NOrientations];
mutable QVector<qreal> q_xx;
mutable QVector<qreal> q_yy;
mutable QVector<qreal> q_widths;