How to pass events from subpanel(s) to the main VI ?

[Cedric51]

hi all,

I found a lot of solutions to pass the events from the main VI to the subpanel(s) but none about passing the events from subpanel(s) to the main VI. In the attached VIs, I just want to generate an event in the main_VI.vi when I click on the button positionned in the subPanel1.vi. How can I do that ?

thanks.

Cedric

[zou]

You can always use user event.

However, what you should do is using the producer/consumer design in your main VI.

In your subpanel, just add the "event" to the queue.

[stevem181]

Cedric,

You could use a queue to transfer the button data to your main vi.

See the attached files:

subPanel1mod - Detects a button change and Enqueues the state.

main_VI mod - uses the Timeout event to poll for data in the queue.

main_VI mod1 - gets the queue data without having to poll.

Like your orginals, these files are in LV2010.

steve

[Cedric51]

hi George,

Could you please elaborate a little bit more on your solutions. Could you please post a simple example of your solutions?

thanks

Cedric

[zou]

The other user already show you the queue method.  That's what you should do.

For the user event method, see attached VIs.

[Cedric51]

Hi George,

thank you for the examples.

My last question is how did you create the string user event refnum on the front panel. I knwo how to do it by creating a constant from the inout of the 'Generate user Event' function but not from scratch.

thanks

Cedric

[zou]

Right click on the output of Create Event function, choose create control.

Cut & paste onto the subpanel VI.