When & how to get component actual size
when inheriting from Component to make your own component and you want it to be working for all sizes (i.e. like a fill-parent style component or streatchable)
when & how is the correct time to query the component width & height?
the when & how are both tightly related because i can assume that the when should be after the component was layout the its container but i dont know which method is called when that is done so i can override it and check for the size (which also btw which method to call to query the size since there are several)