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Cache some information to speed up handling of large output

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Change-Id: I93c37566af029028dc40e5eb48a398eb9c7fff7c
Reviewed-by: David Schulz <david.schulz@theqtcompany.com>
This commit is contained in:
Christian Stenger
2015-08-19 10:22:25 +02:00
committed by David Schulz
parent e6bd5e68ac
commit 71d5142fcc
2 changed files with 46 additions and 40 deletions
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77
plugins/autotest/testresultdelegate.cpp
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@@ -126,32 +126,15 @@ void TestResultDelegate::paint(QPainter *painter, const QStyleOptionViewItem &op
}
if (selected) {
int height = 0;
int leading = fm.leading();
int fontHeight = fm.height();
output.replace(QLatin1Char('\n'), QChar::LineSeparator);
if (AutotestPlugin::instance()->settings()->limitResultOutput
&& output.length() > outputLimit)
output = output.left(outputLimit).append(QLatin1String("..."));
QTextLayout tl(output);
tl.setFont(painter->font());
QTextOption txtOption;
txtOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
tl.setTextOption(txtOption);
tl.beginLayout();
while (true) {
QTextLine tLine = tl.createLine();
if (!tLine.isValid())
break;
tLine.setLineWidth(positions.textAreaWidth());
height += leading;
tLine.setPosition(QPoint(0, height));
height += fontHeight;
}
tl.endLayout();
tl.draw(painter, QPoint(positions.textAreaLeft(), positions.top()));
recalculateTextLayout(index, output, painter->font(), positions.textAreaWidth());
m_lastCalculatedLayout.draw(painter, QPoint(positions.textAreaLeft(), positions.top()));
} else {
painter->setClipRect(positions.textArea());
// cut output before generating elided text as this takes quite long for exhaustive output
@@ -234,31 +217,13 @@ QSize TestResultDelegate::sizeHint(const QStyleOptionViewItem &option, const QMo
output.replace(QLatin1Char('\n'), QChar::LineSeparator);
int height = 0;
int leading = fm.leading();
if (AutotestPlugin::instance()->settings()->limitResultOutput
&& output.length() > outputLimit)
output = output.left(outputLimit).append(QLatin1String("..."));
QTextLayout tl(output);
tl.setFont(opt.font);
QTextOption txtOption;
txtOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
tl.setTextOption(txtOption);
tl.beginLayout();
while (true) {
QTextLine line = tl.createLine();
if (!line.isValid())
break;
line.setLineWidth(positions.textAreaWidth());
height += leading;
line.setPosition(QPoint(0, height));
height += fontHeight;
}
tl.endLayout();
recalculateTextLayout(index, output, opt.font, positions.textAreaWidth());
s.setHeight(height + 3);
s.setHeight(m_lastCalculatedHeight + 3);
} else {
s.setHeight(fontHeight + 3);
}
@@ -275,5 +240,37 @@ void TestResultDelegate::currentChanged(const QModelIndex &current, const QModel
emit sizeHintChanged(previous);
}
void TestResultDelegate::recalculateTextLayout(const QModelIndex &index, const QString &output,
const QFont &font, int width) const
{
if (m_lastProcessedIndex == index && m_lastProcessedFont == font)
return;
const QFontMetrics fm(font);
const int leading = fm.leading();
const int fontHeight = fm.height();
m_lastProcessedIndex = index;
m_lastProcessedFont = font;
m_lastCalculatedHeight = 0;
m_lastCalculatedLayout.clearLayout();
m_lastCalculatedLayout.setText(output);
m_lastCalculatedLayout.setFont(font);
QTextOption txtOption;
txtOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
m_lastCalculatedLayout.setTextOption(txtOption);
m_lastCalculatedLayout.beginLayout();
while (true) {
QTextLine line = m_lastCalculatedLayout.createLine();
if (!line.isValid())
break;
line.setLineWidth(width);
m_lastCalculatedHeight += leading;
line.setPosition(QPoint(0, m_lastCalculatedHeight));
m_lastCalculatedHeight += fontHeight;
}
m_lastCalculatedLayout.endLayout();
}
} // namespace Internal
} // namespace Autotest