isUsing equivalent for ViewManipulate?

[mCodingLLC]

Currently isUsing and friends tell you whether you are using the Manipulate gizmos (translate, rotate, scale), but there doesn't seem to be any way to query whether you are using the ViewManipulate gizmo.

I think this could be achieved by moving some of the static state in ViewManipulate into global state and repeating what is done for isUsing.

Or am I missing some function of how to query this state?

[CedricGuillemet]

I think that's the way to go, yes.

[mgerhardy]

There is a commit in #170 that does this as far as I can see.

[rherilier]

@CedricGuillemet: I can provide a PR for this functionality. Do you prefer that IsUsing() returns true when ViewManipulate(...) is active or a new function IsUsingViewManipulate() as proposed in one of the commit of #170?

[CedricGuillemet]

I'd prefer a new function. To not break back compatibility and for more clarity.

[rherilier]

ok

[rherilier]

@CedricGuillemet: this issue can be closed