void QwtPicker::PrivateData::PickerWidget::updateMask()
{
QBitmap bm(width(), height());
bm.fill(Qt::color0);
QPainter painter(&bm);
if ( d_type == RubberBand )
{
QPen pen = d_picker->rubberBandPen();
pen.setColor(Qt::color1);
painter.setPen(pen);
d_picker->drawRubberBand(&painter);
}
if ( d_type == Text )
{
QPen pen = d_picker->trackerPen();
pen.setColor(Qt::color1);
painter.setPen(pen);
d_picker->drawTracker(&painter);
}
painter.end();
#if QT_VERSION < 0x040000
QWidget *w = parentWidget();
const bool doUpdate = w->isUpdatesEnabled();
const Qt::BackgroundMode bgMode = w->backgroundMode();
w->setUpdatesEnabled(false);
if ( bgMode != Qt::NoBackground )
w->setBackgroundMode(Qt::NoBackground);
#endif
const QRegion r(bm);
setMask(r);
#if QT_VERSION < 0x040000
if ( bgMode != Qt::NoBackground )
w->setBackgroundMode(bgMode);
w->setUpdatesEnabled(doUpdate);
#endif
setShown(!r.isEmpty());
}
void QwtPicker::PickerWidget::updateMask()
{
QRegion mask;
if ( d_type == RubberBand )
{
QBitmap bm(width(), height());
bm.fill(Qt::color0);
QPainter painter(&bm);
QPen pen = d_picker->rubberBandPen();
pen.setColor(Qt::color1);
painter.setPen(pen);
d_picker->drawRubberBand(&painter);
mask = QRegion(bm);
}
if ( d_type == Text )
{
d_hasTextMask = true;
#if QT_VERSION >= 0x040300
if ( !parentWidget()->testAttribute(Qt::WA_PaintOnScreen) )
{
#if 0
if ( parentWidget()->paintEngine()->type() != QPaintEngine::OpenGL )
#endif
{
// With Qt >= 4.3 drawing of the tracker can be implemented in an
// easier way, using the textRect as mask.
d_hasTextMask = false;
}
}
#endif
if ( d_hasTextMask )
{
const QwtText label = d_picker->trackerText(
d_picker->trackerPosition());
if ( label.testPaintAttribute(QwtText::PaintBackground)
&& label.backgroundBrush().style() != Qt::NoBrush )
{
#if QT_VERSION >= 0x040300
if ( label.backgroundBrush().color().alpha() > 0 )
#endif
// We don't need a text mask, when we have a background
d_hasTextMask = false;
}
}
if ( d_hasTextMask )
{
QBitmap bm(width(), height());
bm.fill(Qt::color0);
QPainter painter(&bm);
painter.setFont(font());
QPen pen = d_picker->trackerPen();
pen.setColor(Qt::color1);
painter.setPen(pen);
d_picker->drawTracker(&painter);
mask = QRegion(bm);
}
else
{
mask = d_picker->trackerRect(font());
}
}
#if QT_VERSION < 0x040000
QWidget *w = parentWidget();
const bool doUpdate = w->isUpdatesEnabled();
const Qt::BackgroundMode bgMode = w->backgroundMode();
w->setUpdatesEnabled(false);
if ( bgMode != Qt::NoBackground )
w->setBackgroundMode(Qt::NoBackground);
#endif
setMask(mask);
#if QT_VERSION < 0x040000
if ( bgMode != Qt::NoBackground )
w->setBackgroundMode(bgMode);
w->setUpdatesEnabled(doUpdate);
#endif
setShown(!mask.isEmpty());
}