Need a nice way of parameterizing events

[theodox]

Right now Events are created on controls when they are first attached. If you want to parameterize them you need to get them from the Callbacks dictionary:

with gui.Window('main') as example:
    with gui.VerticalForm('form'):
        for item in cmds.ls(type='transform'):
            b = gui.Button('b_' + item, label = item)
            b.command += move_down
            b.Callbacks['command'].Data['target'] = item

It would be great to be able to explicitly create a paramterized event:

with gui.Window('main') as example:
    with gui.VerticalForm('form'):
        for item in cmds.ls(type='transform'):
            b = gui.Button('b_' + item, label = item)
            b.command = MayaEvent(target = item)

but this won't work with the current setup. How to fix...?

[theodox]

Resolved, i think