Hello all. Just read my signature first, it might explain a lot. I do not intend to compete with Darren and I don't think this "nugget" (at least it supposed to be one) will amaze any of the LV veterans and this forum is rich of them. But maybe it will bring some new ideas to some of you or maybe it will be useful for some LV beginners (like me). It is very likely, my code will have some lapses, but please be gentle pointing that out to me. If you feel a need, you can always optimize the code and develope it further. Just don't forget to share! 😉 So back to the point. I am developing a project using LV. In my program there is a waveform chart which has to show 4 plots. Depending on the length of the X Scale, it sometimes gets hard to see the plots clearly because of their density.So I decided that I need a tool, which would zoom the chart in. And this is what I have came up with after a few "Google" searches to check which part of the bike is already invented and also a bit of programming by myself. Maybe you guys (at least the veterans) know the BetterVIEW Consulting LV example where they have implemented the Mouse Over effect. So a part of their example has been used in this tool and part of the credit must go to them. I thank them a lot 🙂 This tool uses a cluster and its property of visibility to show/hide the cluster depending on if the current position of the mouse cursor is in the desired range or not. The program also gets the image of the chart and returns the subset of the image. The subset is taken for the area arounf the mouse cursor. So if you move the mouse, the zoomed in area will also chage in response. After that, the subset of the image is zoomed in for better view. The user might chage the zoom factor during the execution. Also it is possible to turn the zoom option On or Off if you don't wish to see it for the moment. This is how the front panel looks like: And this is the image of the block diagram (see the attached files for the vi, the VI Snippet tool distorts the code too much, so I haven't added it): I haven't found anything the same in the forum. Yet I'm a newbie here and I don't have that much experience surfing it. If it wouldn't be something new (in the forum, not necessarily to some of you personally), just ignore the thread. I hope this was worth your time and your attention. Good coding 🙂 Message Edited by Giedrius.S on 02-11-2010 12:46 PM

LabVIEW

One more nugget: Chart zoom with the "Mouse Over" effect

I implemented something like this before as an XControl.

It used an XY-graph and allowed the user to select an area. Every time either the selection area changed or the chart data changed the user received an event with the selected data in it.

If I can find it and I'm in a good mood, I'll post it.

Shane.

View All (3)

Message 11 of 11

(568 Views)

What do you need our team of experts to assist you with?

Request a quote Find the right product Place an order Get support on a product

How can we help?

Please enter your information below and we'll be intouch soon.

This field is required

Preferred communication method

Email Phone call

What do you need our team of experts to assist you with?

Request a quote Find the right product Place an order Get support on a product

LabVIEW

One more nugget: Chart zoom with the "Mouse Over" effect

Re: One more nugget: Chart zoom with the "Mouse Over" effect