It seems you want to change the background on focus. You can try something like

QtK, Yellow is good idea, if only toolbuttons is ywllow :)
I think it looks so:

you could do that in one style sheet, then always on click (or focus) the background image is away.

Thanks all men above.

It seems that the code below is the switch of the background-image.

I had solved the problem.

Vass wrote:

QtK, Yellow is good idea, if only toolbuttons is ywllow :) I think it looks so: @toolButton->setStyleSheet(“focus { background-mage:none; }”);@

I just wanted to illustrate how to use it. Didn’t exactly mean to use yellow color. :)