Feature: add support for selectors (type selector, sub palette selector, submitOnChange), palettes and callbacks

[Defcon0]

Hi there,

we already added an issue for DCA mapping. In the mean time, you coded something. In the future we might use this bundle as a base for a new dca form bundle for the frontend.

But the agenda we need to build is quite large and complex. Our legacy module https://github.com/heimrichhannot/contao-formhybrid does this, but it's quite old and uses legacy technologies and modules. In the next years we need to create a new bundle and your bundle seems to be a good starting point.

So the question is, whether you can imagine integrating the following features in this bundle:

1. Support for all kinds of palette selectors (palette and sub palette)
2. Support for submitOnChange (sync and async)
3. Support for toggleSubpalette (sync and async)
4. Support for callbacks (onload, load, save, onsubmit)

The lack of these functionalities in contao's form generator in the frontend was the reason we built formhybrid in the first place.

Or would that be out of your scope and we should build another bundle on top of yours? What do you think?

Thanks in advance for your thoughts.

Bye Defcon0
PS: Please keep in mind that this is a consideration rather for the next years but months ;-)