I have a requirement of having flex fields on an adf application we already have. So is there any way that we can customize Jheadstart to use only the flex items? i.e I would like to use JHeadstart only to define to flex region so i can control manually what goes into the screen and other things happening in View controller ?
Well, not a trivial task but it can be done.
You could create a dummy application and generate the flex regions there, and then move over the generated flex-region-related artefacts to your existing ADF application.