[Bf-committers] Calling operators when drawing a panel

[bartius crouch]

>
> Campbell wrote:
>

>
You have a valid point that we need python integration:
> IMHO scripts should be able to handle notifiers and ability to define
> update functions for python defined properties.
>
> Python defined update functions I can do but handling notifiers should
> be discussed with Ton first since it may relate to python handling
> events which is a bigger project,
> will ask about it before the meeting tonight.
>

This is important in my opinion, as we need an alternative for writing
properties from within the draw panel.
Some background on my opinion: I'm just an enduser who enjoys using the
blender python api to extend blender's functionality. I've written several
scripts for Blender 2.5 and most use this feature as a workaround to create
live-updating interfaces. An example: one of the scripts displays all icons
there are in blender (the add-on is in svn trunk and distributed with
blender) and I use write-access to properties to enable searching within the
icon list. This could be done in a different way, but it would actually make
the script slower, having to recreate the list on each redraw, instead of
having to recreate it on a change in the search string.

I'm aware that allowing to change properties from withon the draw panel is
not ideal, and has the potential for sloppy and bug-producing code, as
Campbell pointed out*. But currently it's the only way we have to achieve
certain things with python. So it would be nice if the proper way (python
access to notifiers/listeners) was implemented in addition to just taking
away the only current method we have.

Cheers,
Bart (Crouch)

* http://markmail.org/message/6sg2clhu3ouap2oc