QScrollArea transparent

[bunjee]

I want my QScrollArea background to be transparent.

Any ideas?

[bunjee]

I've subclassed QScrollArea adding the following statement.



QPalette p(viewport()->palette());
p.setBrush(QPalette::Window, Qt::NoBrush);
viewport()->setPalette(p);

Unfortunately it kills the performances.
Is there a Faster way ?

Mr Arnaud.

[bunjee]

I guess I'm going to code my own optimized QScrollArea....

[fanat9]

Didn't notice any performance problem:


...
QPalette palette = this->palette();
palette.setColor(QPalette::Window, QColor::fromRgb(255,255,255,0));

QScrollArea *negativeArea = new QScrollArea(dockNegativePanel);
componentNegative = new ComponentPanel("Negative", negativeArea);
negativeArea->setWidget(componentNegative);
negativeArea->setPalette(palette);
negativeArea->setBackgroundRole(QPalette::Window);
...