On Saturday 21 February 2009, Toussis Manolis wrote: > I want to add some effect to an applet
what effect are you trying to achieve? because while you ask how to get a
pixmap of your widget, depending on what effect you are trying to achieve that
may not be what you actually want to be doing.
> QPixmap* m_oldPixmap;
>
> void PlasmaApplet::paintInterface(QPainter *p,
> const QStyleOptionGraphicsItem *option, const QRect &contentsRect)
> {
> .... do the painting....
> and now:
> store the current image of the applet for future use in a QPixmap/QImage
> something like that:
> m_oldPixmap=new QPixmap(PlasmaApplet::pixmap())
> };
>
>
> any ideas?
to answer the question you asked, though:
inside of paintInterface, paint everything onto a pixmap and then blit that
pixmap using the QPainter passed in as the final step, e.g. something like
this semi-pseudocode:
if (m_oldPixmap->size() != size()) {
delete m_oldPixmap;
m_oldPixmap = new QPixmap(size());
m_oldPixmap->fill(QColor(Qt::transparent));
}
QPainter painter(m_oldPixmap);
... do the painting ...
painter.end();
p->drawPixmap(option->rect, m_oldPixmap, option->rect);
--
Aaron J. Seigo
humru othro a kohnu se
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KDE core developer sponsored by Qt Software
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