which reference VI accepts different control references?

[Thang Nguyen]

Hi,

Could anyone tell me which VI I should use as a control for a supVI, so by which I can pass different typoe of control reference? For example this can be different cluster.

I want to make a general VI which can do samething on different kinds of clusters.

Thank you,

Thang Nguyen

[jzoller]

QUOTE(Thang Nguyen @ Jul 19 2007, 04:30 PM)

Hi,

Could anyone tell me which VI I should use as a control for a supVI, so by which I can pass different typoe of control reference? For example this can be different cluster.

I want to make a general VI which can do samething on different kinds of clusters.

Thank you,

Thang Nguyen

Hi Thang,

You should be able to use an untyped cluster refnum to access generic cluster properties. On the front panel palette (8.2.1), drop a control refnum from the Modern, Refnum menu. Then right click on the refnum and Select VI Server Class..., Generic, GObject, Control, Cluster, Cluster.

That should at least get you access to the Controls[] list of refnums in any cluster via reference.

Something I don't know: is there a way to programmatically determine the original strict type on the refnum once it's been passed to the subvi?

Joe Z.

[Thang Nguyen]

I got it. Thank you.

[orko]

QUOTE(jzoller @ Jul 19 2007, 03:57 PM)

Something I don't know: is there a way to programmatically determine the original strict type on the refnum once it's been passed to the subvi?

Yes. I've seen it done two ways:

1) You can use the "Class Name" property on the control reference and wire it up to cases that handle each type of control you're passing into the subVI.

http://forums.lavag.org/index.php?act=attach&type=post&id=6424

2) Wire a "to specific class" to the reference and provide a constant of the type you want to test it for. If you get an error, then it isn't that type of control.

http://forums.lavag.org/index.php?act=attach&type=post&id=6425

[jzoller]

Fantastic! #1 is just what I was looking for.

Thanks!

Joe Z.