How to reference multiple variables in a selector?

[Cesar]

Instead of

QWidget[a="true"][b="true"]
{
}

How to:

Check if the widget contains a and b property independent of true or false?
Non working EXAMPLE

QWidget[ab]
{
}

Check if the widget contains a and b and both are true

QWidget[ab="true"]
{
}

[Cesar]

Therea's string list option in qt designer, maybe possible to check for multiple strings at once?

[ChrisW67]

Check if the widget contains a and b property independent of true or false?

No way I can see of doing this.

Check if the widget contains a and b and both are true

See your first example.