[Qt-interest] How to show a QPixmap on widget?

[Kermit Mei]

Hello, all!

I need to make some animation on the widget for my users on ARM. As you
see, for the reason of efficiency, I can't use Graphic and QAnimation
class.

So, I want to use QPixmap grapWidget(...) grab the new widget which I
want to show, and do some animation on this QPixmap object. After this,
I will display the real widget. 

But I don't know how to show a QPixmap except paint it with QPainter,
this method must work in paintEvent(), I don't know how to do it with
QTimeLine, and make a animation. 

Everything for me must consider with its highly efficiency, I hope
anyone can give me some good ideas to do it.

Thank you, very much!

Kermit