border-radius doesn't clip the background using QLabel::render()

[mritalian]

Hi,

I'm having trouble using border-radius, in that it doesn't clip the background.

I am using QLabel as a renderer onto a listview using a delegate:

void MyDelegate::paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const {
 
	const QWidget *widget = opt.widget;
	QStyle *style = widget ? widget->style() : QApplication::style();
	QRect textRect = style->subElementRect(QStyle::SE_ItemViewItemText, &opt);
 
	QLabel lbl;
	lbl.setObjectName("Godzilla");
	painter->save();
	painter->translate(textRect.topLeft());
	lbl.setText("Godzilaaaaaaaaaaaaa");
	lbl.render(painter);
	painter->restore();
 
}

void MyDelegate::paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const {

	const QWidget *widget = opt.widget;
	QStyle *style = widget ? widget->style() : QApplication::style();
	QRect textRect = style->subElementRect(QStyle::SE_ItemViewItemText, &opt);

	QLabel lbl;
	lbl.setObjectName("Godzilla");
	painter->save();
	painter->translate(textRect.topLeft());
	lbl.setText("Godzilaaaaaaaaaaaaa");
	lbl.render(painter);
	painter->restore();

}

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My stylesheet is:

#Godzilla {
    border-radius: 5px;
    background: rgba(255,0,0,80);
    border: 2px solid red;
    color: white;
    font-weight: bold;
    font-size: 10px;
}

#Godzilla {
    border-radius: 5px;
    background: rgba(255,0,0,80);
    border: 2px solid red;
    color: white;
    font-weight: bold;
    font-size: 10px;
}

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The stylesheet is loaded using qApp->setStyleSheet(..);
The style applies (color, border, background), but, the background doesn't clip.

I've tried using

setAttribute(Qt::WA_NoSystemBackground,true);

setAttribute(Qt::WA_NoSystemBackground,true);

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but it just prevents the background and borders from drawing at all.

I am using Qt 4.7 on Windows XP.

TIA

[mritalian]

Found the cause!

lbl.render(painter);

lbl.render(painter);

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The prototype for QWidget::render is:

void render(QPainter *painter, const QPoint &targetOffset = QPoint(),
                const QRegion &sourceRegion = QRegion(),
                RenderFlags renderFlags = DrawWindowBackground | DrawChildren));

void render(QPainter *painter, const QPoint &targetOffset = QPoint(),
                const QRegion &sourceRegion = QRegion(),
                RenderFlags renderFlags = DrawWindowBackground | DrawChildren));

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So the fix is (obviously)

lbl.render(painter, QPoint(), QRegion(), 0);

lbl.render(painter, QPoint(), QRegion(), 0);

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