do something when a command is active

[Joris.vd.Meulen]

Hi,

Is there an option in api that allows us to do something when another command is active?

For instance:

I click on wall command and like to manually override the first pickpoint with my command/script.
That script of mine returns a calculated point, but this script can't be launched / button is greyed out.

Am I right to state that this behaviour (run script while other command is active) is not possible?
(Right click, snap overrides is possible, that behaviour can be mimicked?)

[jeremytammik]

I don't know whether it is completely impossible; almost nothing is. It is probably extremely tricky, in any case, due to the single threaded nature of Revit and the restriction of the API to a valid API context, also running in the single thread.

[Sean_Page]

You could look at Command Binding, but if you already know one point because it's calculated, then why not just create a command that has the user pick the end point and then create the wall programmatically?

[Joris.vd.Meulen]

@Sean_Page because I'd like to create a multipurpose command, so it's not related to one command.

My simple scripts

asks for a base point

asks for two points

returns the midpoint of two user given points. 

I'd like to use this script as I'm creating a wall, as I'm copying a piece of furniture, as I'm moving a curtain wall. 

(at the moment I run this script based upon a selection, but that is an extra step)

But as @jeremytammik mentioned, I too stumbled upon some limitations. Perhaps I'm wrong?