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I am building a listbox extension and in the ,js file I'd like to evaluate an expression with something like app.Evaluate(*string*).
Specifically, I want to get the COUNT of the values in a field before a selection is made in the listbox.
Is this possible?
Can you pls explain a bit more in detail what you are trying to achieve, maybe with some code samples?
Before I call this line in my listbox extension:
self.backendApi.selectValues(dim, [value], true);
I want to first check the calculation of an expression which, in layman's terms, says "If selecting the value that you just clicked on would make another expression < 1, do not allow the selection."
If (expression < 1)
Make the selection
The question is, how can I calculate the result of this expression on the fly?