Flex Icon on Button sizing [Design]

Answer 1

no one has an idea ?

Answer 2

Add a listener on creationComplete event and you can use this code:

    private function OnCreationComplete(event: Event): void
 {
  if (event.target is Button)
  {
   var button: Button = (event.target as Button);
   var icon: DisplayObject = button.getChildByName("upIcon");
   if (icon) // check icon existence
   {
    button.width = icon.width;
    button.height = icon.height;
   }
  }
 }

Should work...