Why isnt this working

Question

After a big loss of out-pulled hair here is the code:
setInterval() calls getNewMess function but it happens
nothing with onNewMess function.
Instead, if i click refresh-button, it gives me result
correctly.

Answer 1

evt.target._parent
is just using the event argument that is dispatched to and
therefore received by your listener function. It is dispatched/sent
by your button component instance. The event object from components
- in as2 - normally contains at least two properties. A type
property... in this case that's "click" , because its a click event
and a target property. The target property is a reference to the
component instance from which the event originated. It can be
particularly useful if you have one listener handling events from
many sources. So.....
evt.target._parent is referring to the container clip of the
instance that sent the event. i.e. The _parent of the button in
this case.
That's why I replaced it with t (=this) which is a reference
to the timeline that the button is running in. Now it doesn't need
to get that reference from checking the _parent of the evt.target
property from the evt argument. Which means the argument that the
newMess function receives can be ignored and its no longer reliant
on it. Sounds confusing but once you "get" it, it all makes sense.
Eventually, lol.
And of couse you don't need to have a button if you don't
want one.