[Bf-taskforce25] Buttons UI context

[Emmanuel Stone]

Hello,

I'm currently trying to something in 2.4 that seems trickier than it
should, and I'm wondering if it'll be possible in 2.5

I'm trying to change a variable X that was set directly using the
uiDefBut pointer mechanism to a callback that does:
changeX(newX-oldX)

Will the new UI context stuff allow to get the old value of a number
button after it has been changed?

-Emmanuel

p.s. Apologies if I'm missing something obvious, Nathan asked me to
send this mail, I'm not 100% certain how this stuff does/should/will
work.