Bar chart user filter validation

Hi there !

So... I've created a bar chart with some custom fields filters. Now, I'm trying to create a validation for 2 date fields, since they're about date interval and I wanna validate if the second one isn't greater than first one, for example.

I created some validations on field, using "validations" property. It shows error mesage, but still filter chart's data.

Here is the point: I wanna prevent it. Doing a analogy to web development, I wanna prevent the load event.

Is it possible ?

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