OK, I have it working now. Thanks for the discussion - made me rethink
how CellRenderer works. Some explaination:
>>What I'm trying to say is that the _parent class's_ implementation of
>>setValue() - i.e. the default one that would get called if
>>you hadn't written your own -
It actually still gets called. Yes, I wrote my own, but this was based
on Macromedia's own examples. Write a cellRenderer class for dataGrid
and you'll see your overridden function setValue gets called anyway.
It's a function that gets called everytime a rollover or change of any
kind occurs in the list component (datagrid).
>>might do something that sets a
>>value in the dataProvider.
Yes, thanks, that gave me a thought, so what I did instead was:
public function createChildren():Void
{
//create checkBox:
cb = this.createClassObject(mx.controls.CheckBox, "cb",
1);
//add cb clicked listener:
cb.addEventListener("click", this);
}
public function setValue(active:Boolean):Void r
{
//"active" refers to the "active" property in dataprovide
//change the checkbox to the value in the dg's dataprovider
//this gets called any time anything happens to/in the datagrid
cb.selected = active;
}
function click():Void //when cb is clicked, change dataprovider
{
//get current cell user is clicking in:
var index_obj = getCellIndex();
//change dataprovider active property to checkbox value:
listOwner.dataProvider[index_obj.itemIndex].active =
cb.selected;
}
>>Because you have _overridden_ setValue, you are skipping your
>>parent class's implementation. The parent code for setValue
>>will never get called _unless_ you use super.setValue in your
>>function. That's how inheritance works.
I understand how that part of inheritance works, and what method
overridding is :) (although, I have made it obvious to you and anyone
listening not all the details). What I was saying is my override class
will still get called, (as I expected) but how I was using it was
incorrect - I think we're understanding the same thing, just talking
past each other. :)
>>Other than that, I don't have enough context to go further,
>>I'm afraid. Just trying to suggest obvious routes. Apologies
>>if I'm being obscure.
Thanks very much for the help! You made me rethink how I was using
those overriding functions, and I have it working now!
Jason Merrill
Bank of America
Learning and Organizational Effectiveness
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