= Patch for exporting an interface to alternative ticket workflows, and a plugin using it =

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'''''All further development of the patch is now being undertaken on Trac's Trac under t:WorkFlow.'''''
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== Description ==

This is a patch ''against Trac trunk'' which implements an extension mechanism for allowing alternative ticket work flows. It is discussed at length on PEC under [trac-ticket:869 #869] and [trac:NewWorkflow NewWorkFlow].

The patch adds two things to Trac's Python API:

  * The `trac.ticket.api.ITicketWorkflow` interface, which abstract the ticket action control logic into an extension point.
  * The `trac.ticket.field` module which is used to describe ticket fields that can be passed to Trac's `form_control()` Clearsilver function.

It also adds one function to Trac's Clearsilver macros:

  * `form_control(control)`. This takes a `trac.ticket.field.Field` object and renders it as a form control.