topic property node to control multiple cursors in LabVIEW

property node to control multiple cursors

Pavitra — Mon, 03 May 2004 11:58:32 GMT

I want multiple cursors on a waveform graph. and i want to control their visibility by buttons, i.e, If i click on cursor 1 it should show me only cursor 1, all the other cursors should be hidden. Also, when the VI is loaded none of the cursors should be visible . How do i use property node of the waveform graph to achieve this. I dont know how to use property node.

Re: property node to control multiple cursors

Jonnie_5 — Mon, 03 May 2004 12:22:06 GMT

One way is that once you have the graph set up w/ the proper number of cursors, you can use a sequence of the Property Nodes Active Cursor -> Visble? for the total number of cursors to affect visability.

See attached LV 6.1 example.

Re: property node to control multiple cursors

J.Dred — Sat, 01 Dec 2007 19:07:48 GMT

hi Jonnie,

thnx for this nice example , I have a question on it, Can I change the beginning time of each plot? e.g button one should start with 12:30:18

button two 10:10:30 etc ? if possible how ?

Re: property node to control multiple cursors

Amanda_H — Mon, 03 Dec 2007 21:09:38 GMT

Hi,

You could try using the VIs under the Timing Palette, such as "Get Date/Time in Seconds" or "Get Date/Time String". You could use logic and case structures to allow the time to determine the action of the VI, such as which cursor will be shown. Here is a KnowledgeBase article about converting a date/time string into a timestamp constant. (There are many ways to accomplish this; this article is a good resource.)

Happy coding!

Re: property node to control multiple cursors

J.Dred — Mon, 03 Dec 2007 21:32:43 GMT

thx for you example , my problem is to make the begin of X chart, which also reads samples/sec from a string.

regards

john

Re: property node to control multiple cursors

Amanda_H — Tue, 04 Dec 2007 19:00:45 GMT

Yes, you can simply change the values in the first column of the cursors listbox. This will place the x-value of the cursor at the point at which you determine. Hope this helps!

Re: property node to control multiple cursors

altenbach — Wed, 05 Dec 2007 17:03:57 GMT

I am aware that Jonnie 5's example is over three years old, but changing the visibility of three cursors certainly does not need a 6 frame stacked sequence containing six property nodes. All you need is a FOR loop. 🙂

(And of course we only need to write these properties only when one of the booleans change, and not every 100ms.)

Keep it simple!

Message Edited by altenbach on 12-05-2007 09:03 AM