[Qt-interest] How can I change a button's background?

[Kermit Mei]

On Fri, 2009-06-19 at 11:53 +0200, Oliver Demetz wrote:
> Hi!
> You are trying to reimplemtent a feature which is already available out 
> of the box from the lib.
> Have a look into StyleSheets, eg
> button.setStyleSheet("background-image:url(./img.png);");
> Regards,
> Oliver

I know styleSheet, but I also can Not see any different effect when I
press. I use this sentence:
rBtn.setStyleSheet("border-style:solid;background-image:url(./bk.png);");

And another question: the background picture's size can't increase with
the button itself.

If there's many buttons, will it make my program run slowly? I need it
run on ARM 9.

Thanks for your help:)

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