topic Re: Use mouse scroll wheel to change numeric control in LabVIEW

Use mouse scroll wheel to change numeric control

richard.koo — Fri, 17 Aug 2012 18:27:43 GMT

Does anyone know if and how I can use the mouse scroll wheel to change numeric control values?

Re: Use mouse scroll wheel to change numeric control

P@Anand — Fri, 17 Aug 2012 18:39:01 GMT

Good question. Am not sure whether it is available or not but you can use the keyboard Up and Down buttons to change the value (You made me think why not for Mouse scroll button).

Re: Use mouse scroll wheel to change numeric control

Nathan-P — Mon, 20 Aug 2012 15:38:01 GMT

You can look into the following thread:

http://forums.ni.com/t5/LabVIEW/Mouse-wheel-scroll-event-ON-CHANGE/m-p/1137666#M501292

The link points to a post that has an example VI that shows how to capture the scroll wheel events. Run ME_Example.vi to see how it works.

Re: Use mouse scroll wheel to change numeric control

jcarmody — Mon, 20 Aug 2012 16:50:47 GMT

You could cheat a bit... There are two hidden cases that set the boolean in the Shift Register True or False when the Numeric Mouse Enter and Mouse Leave events occur.

Re: Use mouse scroll wheel to change numeric control

richard.koo — Mon, 20 Aug 2012 18:09:19 GMT

Thanks. I will digest this then maybe I can integrate this into my apps..

Re: Use mouse scroll wheel to change numeric control

richard.koo — Mon, 20 Aug 2012 18:11:54 GMT

Jcarmody, thank you for the screen shot. I like this one. Can you also show the hidden event cases or attach the vi?

Re: Use mouse scroll wheel to change numeric control

crossrulz — Mon, 20 Aug 2012 18:26:12 GMT

Another option would be to change the timeout. This would avoid the timeout event every ms when the mouse has not "entered" the contol.

Re: Use mouse scroll wheel to change numeric control

richard.koo — Mon, 20 Aug 2012 18:42:37 GMT

Crossrulz, thank you for the vi. Can you save it as 2010?

Re: Use mouse scroll wheel to change numeric control

crossrulz — Mon, 20 Aug 2012 18:51:06 GMT

I gotta start remembering to save for previous when I post...

Saved in 2009.

Re: Use mouse scroll wheel to change numeric control

richard.koo — Mon, 20 Aug 2012 19:59:50 GMT

Thanks.

Re: Use mouse scroll wheel to change numeric control

jcarmody — Mon, 20 Aug 2012 22:57:43 GMT

Mine is a snippet that you should be able to drag from your browser onto a block diagram and have automagically converted to code.

Re: Use mouse scroll wheel to change numeric control

richard.koo — Mon, 20 Aug 2012 23:41:32 GMT

jcarmody, that would be cool. But when I dragged it onto a blank block diagram, all I got is a text label:

http://forums.ni.com/t5/image/serverpage/image-id/84118iC87C3DA23C0B55EF/image-size/original?v=mpbl-1&px=-1

What am I missing? Thanks.

Re: Use mouse scroll wheel to change numeric control

richard.koo — Tue, 21 Aug 2012 03:46:29 GMT

crossrulz and jcarmody, your vi works great for a single numeric control. How do I handle multiple numeric controls? I created an event loop for each of the numeric controls. But the mouse enter/leave events only fire up for the first numeric control. And when entered in the first numeric control, the scroll takes turn changeing values of all numeric controls. Please see atached. Thanks.

Re: Use mouse scroll wheel to change numeric control

richard.koo — Tue, 21 Aug 2012 03:53:16 GMT

crossruls and jcarmody, nevermind. I neglected to edit the events handled by the additional loops. Changed them to "Numeric 2" Mouse Enter, ... etc and it works fine. But somehow in my main application, the mouse never leaves. That's what prompted me to try the multi-numeric thing.

Re: Use mouse scroll wheel to change numeric control

jcarmody — Tue, 21 Aug 2012 10:44:36 GMT

@richard.koo wrote:

jcarmody, that would be cool. But when I dragged it onto a blank block diagram, all I got is a text label:

http://forums.ni.com/t5/image/serverpage/image-id/84118iC87C3DA23C0B55EF/image-size/original?v=mpbl-1&px=-1

What am I missing? Thanks.

I think that's an issue with the way your browser handles dragging images. Try saving the image to your computer and dragging it into the block diagram from there. In Windows XP, I save snippets to my desktop then drag them onto the BD from there.

Re: Use mouse scroll wheel to change numeric control

MaxCrunch — Tue, 21 Aug 2012 11:27:42 GMT

@jcarmody wrote:

@richard.koo wrote:

jcarmody, that would be cool. But when I dragged it onto a blank block diagram, all I got is a text label:

http://forums.ni.com/t5/image/serverpage/image-id/84118iC87C3DA23C0B55EF/image-size/original?v=mpbl-1&px=-1

What am I missing? Thanks.

I think that's an issue with the way your browser handles dragging images. Try saving the image to your computer and dragging it into the block diagram from there. In Windows XP, I save snippets to my desktop then drag them onto the BD from there.

There's an issue with Firefox and, I believe, with Chrome.

There's a Quick Drop plugin available which is a useful workaround for this:

https://decibel.ni.com/content/docs/DOC-6229

Re: Use mouse scroll wheel to change numeric control

richard.koo — Tue, 21 Aug 2012 18:50:17 GMT

@MaxCrunch wrote:

@jcarmody wrote:

@richard.koo wrote:

jcarmody, that would be cool. But when I dragged it onto a blank block diagram, all I got is a text label:

http://forums.ni.com/t5/image/serverpage/image-id/84118iC87C3DA23C0B55EF/image-size/original?v=mpbl-1&px=-1

What am I missing? Thanks.

I think that's an issue with the way your browser handles dragging images. Try saving the image to your computer and dragging it into the block diagram from there. In Windows XP, I save snippets to my desktop then drag them onto the BD from there.

There's an issue with Firefox and, I believe, with Chrome.

There's a Quick Drop plugin available which is a useful workaround for this:

https://decibel.ni.com/content/docs/DOC-6229

Thanks Max, I tried with IE and it seem to work. There is a version issue, but that's something else.

Re: Use mouse scroll wheel to change numeric control

richard.koo — Tue, 21 Aug 2012 18:53:23 GMT

@jcarmody wrote:

@richard.koo wrote:

jcarmody, that would be cool. But when I dragged it onto a blank block diagram, all I got is a text label:

http://forums.ni.com/t5/image/serverpage/image-id/84118iC87C3DA23C0B55EF/image-size/original?v=mpbl-1&px=-1

What am I missing? Thanks.

I think that's an issue with the way your browser handles dragging images. Try saving the image to your computer and dragging it into the block diagram from there. In Windows XP, I save snippets to my desktop then drag them onto the BD from there.

Thanks, you are right that it is with Chrome. IE seems to work, but I only have LabVIEW 10.

Re: Use mouse scroll wheel to change numeric control

richard.koo — Tue, 21 Aug 2012 19:32:22 GMT

@richard.koo wrote:

.... But somehow in my main application, the mouse never leaves. That's what prompted me to try the multi-numeric thing.

I found out that once mouse enter fires up, the 1ms time out seem to tie up my cpu and no other events get serviced. This actually makes all my front panel controls non-responsive. I tried increasing the time out and at 120ms, it works. I have a 1st gen quad core i7 Q720 1.6GHz. My main vi is 5MB. I have 10 event loops running before adding the event loop that services mouse scroll of 1 numeric control. I have totally 20 numeric controls that I would like scroll capability. Am I taxing the cpu excessively? Anyway to optimize? I don't mind upgrading my pc, but the target computer would be ordinary pcs and the app must work on them.

Re: Use mouse scroll wheel to change numeric control

crossrulz — Tue, 21 Aug 2012 19:36:34 GMT

I would suggest changing to something like this so that there aren't nearly so many event structures.