is extending mxml component with from another mxml component with visual child supported behavior in flex 4?

Question

I've been trying to create a custom mxml component that extends another custom mxml component (i.e. MyMXMLComponent -> BaseMXMLComponent -> Group).

I've been reading that trying to add visual children to MyMXMLComponent caused error with Flex 3 but that's no longer the case with Flex 4.

What I want to know is whether this is a supported/fixed/documented feature of Flex 4? or just some undefined behavior in Flex 4 that may get changed with future updates?

if this is supported and documented feature, does anyone have link pointing to adobe document stating it as such?

You just want to extend the functionality of some custom component? — The_asMan
no i wanted to write a base class that layout some base visual elements and write a child class that add additional visual elements — lordofthefobs

J_A_X J_A_X · Accepted Answer · 2011-05-18T22:01:21

Sure is supported in Flex 4. You need to use the DefaultProperty metadata tag on a public property of your custom component.

It's as easy as that :)

is extending mxml component with from another mxml component with visual child supported behavior in flex 4?

1 Answers