Closing control reference?

[BertMcMahan]

Does the control reference fed to the Qcontrol ever get closed somewhere? I see where the State data and event handler are closed, but it looks like the reference is left open. Is that correct? If so, is it intentional?

[Darren · Accepted solution]

Control references never need to be closed. More generally, nothing that inherits from GObject ever needs to be closed. LabVIEW manages those references internally, and trying to close them is a no-op.

See my Brainless LabVIEW presentation for more info.

[BertMcMahan]

Ah TIL! I usually try to rabidly close references because that's the "conventional wisdom"- when you open a reference somewhere, you must close it elsewhere. I'd assumed most of these references worked the same way as, say, a queue reference worked, where each "obtain reference" was unique.

Thanks for that presentation, it's very informative. I need me one of those mousepads 😉

[TheQ]

On a similar note, it is best to always use the Close method on every QControl.  However, if you forget, I did make it smart enough that the orphaned Event Handler would be stopped automatically as to not hang your application.