Enabling a UI control based on VariablesListBox

[vjalby]

It's possible to conditionally enable a UI control using the enable keyword.

But when the condition is "a VariablesListBox is filled", I have to use 2 negations, eg

Code: Select all

enable: (!(!group))

Now, I wonder if there's a way to test (without JS) if a VariablesListBox is filled with more than 1 variable ?