QPainter: Setting clipping to false does not seem to have an effect on Mac OS X when using a gradient brush.

Setting clipping to false does not seem to have an effect on Mac OS X when using a gradient brush.

Can be reproduced with the following example:

#include <QApplication>
#include <QWidget>
#include <QPainter>

inline QColor qt_mix_colors(QColor a, QColor b)
{
return QColor((a.red() + b.red()) / 2, (a.green() + b.green()) / 2,
(a.blue() + b.blue()) / 2, (a.alpha() + b.alpha()) / 2);
}

class RenderBug : public QWidget
{
public:
RenderBug(QWidget *parent = 0) : QWidget( parent ) {}

protected:
void paintEvent(QPaintEvent *event)

{ QPainter painter(this); painter.setRenderHint( QPainter::Antialiasing, true ); QRect r1( 30, 30, 30, 30 ); QRect r2( 30, 60, 30, 30 ); painter.setPen( palette().dark().color() ); painter.setBrush( palette().light().color() ); #if 1 // enable this code to display the bug QLinearGradient gradient( r1.topLeft(), r2.bottomLeft()); gradient.setColorAt( 1., palette().dark().color() ); gradient.setColorAt( .13, qt_mix_colors( palette().dark().color(), palette().light().color() ) ); gradient.setColorAt( 0., palette().light().color() ); painter.setBrush( gradient ); #endif painter.drawRect( r1.adjusted( 5,5,-5,-5) ); painter.setClipRect( r1 ); painter.setClipping( true ); painter.drawLine( QLine(r1.bottomLeft(), r1.topRight()) ); painter.setClipping( false ); painter.drawRect( r2.adjusted( 5,5,-5,-5) ); }

};

int main(int argc, char *argv[])
{
QApplication app(argc, argv);
RenderBug widget;
widget.setGeometry(100, 100, 500, 355);
widget.show();
return app.exec();
}