Subclassing of DataGridColumn to add styles?

I would like to extend DataGridColumn to provide styleable formatting (rather than just using labelFunction) and a few other minor features by styles. The Flex documentation says I should replace styleChange(styleProp:String) on UIComponent, but DataGridColumn extends CSSStyleDeclaration and not UIComponent, so who does not apply. Should I just replace setStyle? I follow the call to super in managing changes to my own style? If so, should I what I call before or after that I make my changes?

I think of the DataGridColumns as being relatively passive.  You can set styles on them and don't need to act on it immediately.  Simply call invalidateList on the DG and the new styles will get used when posting updates the renderers.

So you probably don't need substitute setStyle for formatString at all.  InvalidateList will be called for you and then will be called your itemToLabel substitution.

For the style of the kind, it depends on what he does.  If it affects the rendering engine, here again, you have no need to override setStyle, but if you change a sort for the dataProvider you and update the DP in the substitution.  I would always call super.setStyle () in a substitute, probably on the first line.

Alex Harui

Flex SDK Developer

Adobe Systems Inc..

Blog: http://blogs.adobe.com/aharui

Tags: Flex

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