QPainter fill rectangle with gradient

beecksche

Hi,
i want to draw a rectangle filled with a linear gradient. My code:

void Legend::paintEvent(QPaintEvent *) 
{
	QPainter painter(this);

	m_gradient.setColorAt(0.0, Qt::blue);
	m_gradient.setColorAt(1.0, Qt::red);

	painter.fillRect(QRect(0, 0, 20, height()), m_gradient);
}

When painting the widget, the rectangle is only filled with the last color (red).

Where is my mistake?

mrjj

Hi
You need to define the interpolation area
like
QLinearGradient m_gradient(0,0,0,100);
m_gradient.setColorAt(0.0, Qt::blue);
m_gradient.setColorAt(1.0, Qt::red);

beecksche

@mrjj
Yeah make sense.

Thanks!