Are Qt's stylesheets really handling _dynamic_ properties?

Question

Is Qt\'s dynamic properties really so dynamic with stylesheets?

I have the basic example from stylesheets and dynamic properties:

/*stylesheet:*/
*[f         


        

Answer 1

I tried this too with no luck, and when I found the following text in the documentation, I gave up. See The Style Sheet Syntax:

Warning: If the value of the Qt property changes after the style sheet has been set, it might be necessary to force a style sheet recomputation. One way to achieve this is to unset the style sheet and set it again.

Answer 2

The following works for me to ensure a proper restyling of the widget:

myWidget->setStyle(QApplication::style())

Forcing a recomputation of the stylesheets as proposed by mdcl did not work for me. I am using Qt 4.5.3.

Answer 3

Qt has the following recommendation in their FAQ:

style()->unpolish(theWidget);
style()->polish(theWidget);

They also say you can reset the stylesheet by doing the following but it is more expensive:

setStyleSheet(styleSheet());

Answer 4

I found a quick, although a bit hackish, way to update widget's styling.

myWidget->style()->unpolish(myWidget);
myWidget->ensurePolished();

Doing this after changing properties keeps correlation between property data and UI.