Question

I have a function that is made up of two main parts (I’ll call them A and B). Part B needs to run when part A is fully done with its layout changes. However, there is no “part A is done” signal, and thus I’ve been calling a validateNow() before part B runs. This works but seems awfully inefficient – was wondering if there are any other tricks to force an immediate measure or something along those lines or if I’m stuck.
thank you!

Answer 1

You can invoke part B from within updateDisplayList().

For that you need to introduce some flag:

private var partAPerformed:Boolean;

Then within function after finishing part A:

partAPerformed = true;
invalidateDisplayList();

And then:

override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
{
    super.updateDisplayList(unscaledWidth, unscaledHeight);
    if (partAPerformed)
    {
        // Part B
        partAPerformed = false;
    }
}