[Bf-taskforce25] Buttons UI context

[Brecht Van Lommel]

Hi,

Emmanuel Stone wrote:
> 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?

Nothing in 2.5 specifically addresses this problem, though it would be 
easy to add some kind of callback to set the value rather than having 
the button set it directly for example. It's really a bit of a 
limitation in the interface code, where you have to hack a bit to work 
with a value for which there is no direct pointer. That is quite rare 
though, and in general the purpose is of course that you just pass the 
pointer whenever possible, because it gives more compact code.

Brecht.