[OpenAjaxIDE] Gadgets TF requests restoration of onchangePattern

[Jon Ferraiolo]

> So what’s the argument for having the pattern at all? (other than
> it’s already implemented)

I'm not sure what all of the arguments are, but here are ones that I
remember from today's phone call.

Here is a weak argument: because the widget author prefers to name his
callbacks in a different way

A stronger argument is that some developers will want to offer a single
callback function to cover all properties, such as propertyChangeCallback
(), especially if his widget has many similar properties. Then he could
say:

<properties onchangePattern-"propertyChangeCallback">
<property name="prop1" .../>
<property name="prop2" .../>
etc.
</properties>

Jon

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