/*!
\reimp
*/
QSize QWidgetItem::maximumSize() const
{
if (isEmpty()) {
return QSize(0, 0);
} else {
return !wid->testAttribute(Qt::WA_LayoutUsesWidgetRect)
? toLayoutItemSize(wid->d_func(), qSmartMaxSize(this, align))
: qSmartMaxSize(this, align);
}
}
void QScrollAreaPrivate::updateScrollBars()
{
Q_Q(QScrollArea);
if (!widget)
return;
QSize p = viewport->size();
QSize m = q->maximumViewportSize();
QSize min = qSmartMinSize(widget);
QSize max = qSmartMaxSize(widget);
if (resizable) {
if ((widget->layout() ? widget->layout()->hasHeightForWidth() : widget->sizePolicy().hasHeightForWidth())) {
QSize p_hfw = p.expandedTo(min).boundedTo(max);
int h = widget->heightForWidth( p_hfw.width() );
min = QSize(p_hfw.width(), qMax(p_hfw.height(), h));
}
}
if ((resizable && m.expandedTo(min) == m && m.boundedTo(max) == m)
|| (!resizable && m.expandedTo(widget->size()) == m))
p = m; // no scroll bars needed
if (resizable)
widget->resize(p.expandedTo(min).boundedTo(max));
QSize v = widget->size();
hbar->setRange(0, v.width() - p.width());
hbar->setPageStep(p.width());
vbar->setRange(0, v.height() - p.height());
vbar->setPageStep(p.height());
updateWidgetPosition();
}
Q_GUI_EXPORT QSize qSmartMaxSize(const QWidgetItem *i, Qt::Alignment align)
{
QWidget *w = ((QWidgetItem*)i)->widget();
return qSmartMaxSize(w->sizeHint().expandedTo(w->minimumSizeHint()), w->minimumSize(), w->maximumSize(),
w->sizePolicy(), align);
}
Q_WIDGETS_EXPORT QSize qSmartMaxSize(const QWidgetItem *i, Qt::Alignment align)
{
QWidget *w = const_cast<QWidgetItem*>(i)->widget();
return qSmartMaxSize(w->sizeHint().expandedTo(w->minimumSizeHint()), w->minimumSize(), w->maximumSize(),
w->sizePolicy(), align);
}
void QScrollAreaPrivate::updateScrollBars()
{
Q_Q(QScrollArea);
if (!widget)
return;
QSize p = viewport->size();
QSize m = q->maximumViewportSize();
QSize min = qSmartMinSize(widget);
QSize max = qSmartMaxSize(widget);
if ((resizable && m.expandedTo(min) == m && m.boundedTo(max) == m)
|| (!resizable && m.expandedTo(widget->size()) == m))
p = m; // no scroll bars needed
if (resizable)
widget->resize(p.expandedTo(min).boundedTo(max));
QSize v = widget->size();
hbar->setRange(0, v.width() - p.width());
hbar->setPageStep(p.width());
vbar->setRange(0, v.height() - p.height());
vbar->setPageStep(p.height());
updateWidgetPosition();
}
void tst_QLayout::smartMaxSize()
{
QVector<int> expectedWidths;
QFile f(QFINDTESTDATA("baseline/smartmaxsize"));
QCOMPARE(f.open(QIODevice::ReadOnly | QIODevice::Text), true);
QTextStream stream(&f);
while(!stream.atEnd()) {
QString line = stream.readLine(200);
expectedWidths.append(line.section(QLatin1Char(' '), 6, -1, QString::SectionSkipEmpty).toInt());
}
f.close();
int sizeCombinations[] = { 0, 10, 20, QWIDGETSIZE_MAX};
QSizePolicy::Policy policies[] = { QSizePolicy::Fixed,
QSizePolicy::Minimum,
QSizePolicy::Maximum,
QSizePolicy::Preferred,
QSizePolicy::Expanding,
QSizePolicy::MinimumExpanding,
QSizePolicy::Ignored
};
Qt::Alignment alignments[] = { 0,
Qt::AlignLeft,
Qt::AlignRight,
Qt::AlignHCenter
};
int expectedIndex = 0;
int regressionCount = 0;
for (size_t p = 0; p < sizeof(policies)/sizeof(QSizePolicy::Policy); ++p) {
QSizePolicy sizePolicy;
sizePolicy.setHorizontalPolicy(policies[p]);
for (size_t min = 0; min < sizeof(sizeCombinations)/sizeof(int); ++min) {
int minSize = sizeCombinations[min];
for (size_t max = 0; max < sizeof(sizeCombinations)/sizeof(int); ++max) {
int maxSize = sizeCombinations[max];
for (size_t sh = 0; sh < sizeof(sizeCombinations)/sizeof(int); ++sh) {
int sizeHint = sizeCombinations[sh];
for (size_t a = 0; a < sizeof(alignments)/sizeof(int); ++a) {
Qt::Alignment align = alignments[a];
QSize sz = qSmartMaxSize(QSize(sizeHint, 1), QSize(minSize, 1), QSize(maxSize, 1), sizePolicy, align);
int width = sz.width();
int expectedWidth = expectedWidths[expectedIndex];
if (width != expectedWidth) {
qDebug() << "error at index" << expectedIndex << ":" << sizePolicy.horizontalPolicy() << align << minSize << sizeHint << maxSize << width;
++regressionCount;
}
++expectedIndex;
}
}
}
}
}
QCOMPARE(regressionCount, 0);
}
Q_EXPORT QSize qSmartMaxSize( QWidget *w, int align )
{
QWidgetItem item( w );
return qSmartMaxSize( &item, align );
}
Q_GUI_EXPORT QSize qSmartMaxSize(const QWidget *w, Qt::Alignment align)
{
return qSmartMaxSize(w->sizeHint().expandedTo(w->minimumSizeHint()), w->minimumSize(), w->maximumSize(),
w->sizePolicy(), align);
}
