Question

I need to change the background image of a QPushButton when its state is pressed. I tried with this css:

QPushButton { background: transparent; border: none;} 
QPushButton:pressed { image: url(\mypath\settings_press.png); }

but a runtime I got the following error:

Could not parse stylesheet of widget

Any idea?

Answer 1

All of the examples of Qt stylesheets I’ve seen use UNIX style paths, so your CSS should look like:

QPushButton { background: transparent; border: none;} 
QPushButton:pressed { image: url(/mypath/settings_press.png); }

Also, URLs for Qt stylesheets need to be a relative path to a Qt resource like:

QPushButton:pressed { image: url(':images/settings_press.png') }

or absolute paths like:

QPushButton:pressed { image: url('/usr/share/icons/crystalsvg/settings_press.png') }

I would go the resource route unless you can absolutely guarantee the install path of your image.