I assume this is AS3 in Flash AS3 preview?
I tried your example code and it worked as expected, even when I
instantiated Subclass by a variable reference to the class. I have a
feeling you have made some mistake in your code... if not, could you
send a complete example, that we can just paste into a file and run?
Peter
On 11/14/06, Matt Garland <[EMAIL PROTECTED]> wrote:
I was hunting a bug when I found this out:
class SuperClass {
public function init() {
trace ("superclass init");
}
}
class SubClass extends SuperClass{
public override function init(){
trace ("subclass init");
}
}
if you create a subclass instances and cast it (or type its variable)
to the superclass, when init is invoked, the superclass init is called.
var aInstance:SuperClass=new SubClass();
aInstance.init();//"superclass init"
Makes senses, now how about a way around this? I want to make sure
the instance's OWN init() is called.
Here's the context: I'm upcasting in a button factory class, when
SubClass is a variable:
public function ButtonFactory(graphicsFactory:graphicFactory,
buttonClass:Class) {
//the compiler won't let me cast to an unknown class, so
//since I know buttonClass is a descendent of BaseButton, which has
all the relevant graphics-setting methods, I upcast it
//buttonClass-->BaseButton
aButton:BaseButton=new buttonClass()
//the graphics settings methods are in BaseButton, so I'm fine to
build up the graphics
aButton.disabledState=graphicsFactory.makeDisabledState()
//but this calls BaseButton.init(), not buttonClass.init()
aButton.init()
}
Thanks
matt
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