Programmatically change numeric control increment

Hi! I need to programmatically change the increment to a numeric control.
How would I do this in LV6.02? I tried using custom controls (arrows) and an
indicator and adding/subtracting the increment (separate control) to the
value. This works ok but my loop runs at 250ms so it updates real slow. Any
ideas?
As far as I know LV5 never had the facility but does LV6?
Leon

I've used 2 boolean controls (up/down). When either is clicked, the
increment (standalone numeric control) is added/subtracted to the value, the
result of which is displayed on a numeric indicator placed beside the
up/down arrows (makes it look like its an ordinary numeric control). The
problem is the booleans are read only once every 250ms, causing the
increment to take place at 4 times a second. If, however, it was a standard
numeric control, I could change value regardless of loop time (even though
it would be read only when the loop executed).
I will try your suggestion. If the control is invisible, will I be able to
access the arrows? Thanks.
Leon
"PdB_Serenity_nl" wrote in message
news:[email protected]
com...
> Have you tried using an invisible (transparant) control on top of the
> corresponding indicator?
> Takes less time to draw so your UI-loop can be made more quickly.
> Or what about a mechanism for detecting that you pressed the up/down
> button to make the increase-decrease value bigger?

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Use mouse scroll wheel to change numeric control

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Another option would be to change the timeout. This would avoid the timeout event every ms when the mouse has not "entered" the contol.
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Attachments:
Mouse Scroll.vi ‏14 KB

How to change numeric control and indicator radix programmatically?

Hi All,
I need to know how can we change the radix of numeric control as well as numeric indicator while program is running.
Regards,
Pramod M G
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Right. Sorry Display Format -> Format
Jim
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I often construct GUIs where user input in one control automatically changes other controls.
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Personally, I usually choose the same approach as you did, implementing a flag which I'll check when events are fired. If you do this, however, be sure to make the flag volatile, otherwise it might (very rarely) happen that a thread caches the value (even though this points to faulty code on your side, it is well near impossible to debug). I would strongly recomment not to remove and readd the listeners since it will create a lot of overhead and is rather hard to maintain.

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Hi Sonny:
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Changing numeric control representation causes fatal internal error.

Has anyone seen this problem. In the attached program the control at the top of the front panel named "Part Number" is a U64 which was part of an earlier program. I wanted to change the representation of the control since I don't need a U64 so I tried to change it to a U8 or any other unsign number and get an fatal internal error which closes the program. The error screen is also attached. Is this a know issue? Is there a work around the problem? Just not sure why changing this control's representation would cause such a error? Please let know if this has been seen before.
Regards
Gary
Attachments:
Sockeye1P1.zip ‏210 KB
LV2010_ErrorScreen.JPG ‏96 KB

Hey Gary,
Sorry to hear that you're experiencing this error. This could be related to a known LabVIEW 2010 issue with case structure selectors having their representation changed. A Corrective Action Request for that particular issue has been filed for this so that it can be looked at for future versions. The workaround is to delete and re-add the case structure (just the one where the Part Number is the case selector, located in your "WaitStart" state). Basically, the case structure gets corrupted causing the crash.
I wasn't able to reproduce this on my machine, however I had to cull a lot of your code to run it here due to missing subVIs, etc. Let me know if deleting and re-adding the case structure fixes your issue and hopefully we can get to the bottom of this.
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Numeric Control - Text and Background Color changes when operating inc/dec arrows

Hi,
I'm developing an application that has a panel with black background and green or red numbers. I've added numeric controls and configured the text color and text background color attributes accordinglingy. I set the numeric control to hot or validate control mode and show the inc/dec arrows, since I want to be able to incr/decr the numbers.
The problem is that when I run the application and I hit the inc/dec arrows, then the colors inside the numeric control frame become inverted: the black background becomes white and the green number becomes cyan. I've created a callback function assosicated with the numeric control and tried forcing the text and background color, in the EVENT_VAL_CHANGED section, using the SetCtrlAttrribute() function, but to no avail. Also added ProcessDrawEvents didn't help.
When I mouse click again outside the numeric control, then it reverts back to its original colors (green text, black background).
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I want it to keep its original colors at all times, even when I'm clicking the incr/decr arrows...
Kind regards,
pgriep
Solved!
Go to Solution.

Ok, now I see what's happening.
The effect you are seeing is a resul of standard numeric control behaviour combined with the black bcakground: when you use arrows to increment/decrement a numeric control its value will be automatically highlighted; on the default background you'll see the white area and figures highlighted in black (white numbers on balck background). If you set the background to black the system will automatically change the colors used to highlight the text, and that's what you're seeing.
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Attachments:
ModifiedApplication.zip ‏9 KB

With Traditional NI-DAQ Compatibility VI's the acquisition locks when I press the increment or decrement button of a numeric control.

Hello all.
I´m using a PCI-6220 and the Traditional NI-DAQ Compatibility VI's to make the acquisition that is in the attached VI. But when I click the increment/decrement button on the numeric controls my acquisition stops. In the same PC I made the same experience with a 6040 and I could not see this problem. I tried with the PCI-6220 with the DaqMX VI's and I could not see this problem too, for these reasons I believe that the problem has something to do with the Traditional NI-DAQ Compatibility VI's.
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Attachments:
experiencia.vi ‏49 KB

Hello
For what I’ve seen on National web site, using the “Traditional compatibility VI’s”, it sould be possible to control a NI-DAQmx using code written in NI-DAQ Traditional. This information was obtained from the following NI link:
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Please read this information and then tell me something please.
Best regards!

The acquisition locks when I press the increment or decrement button of a numeric control

Hello all.
I´m using a PCI-6220 and the Traditional NI-DAQ Compatibility VI's to make the acquisition that is in the attached VI. But when I click the increment/decrement button on the numeric controls my acquisition stops. In the same PC I made the same experience with a 6040 and I could not see this problem. I tried with the PCI-6220 with the DaqMX VI's and I could not see this problem too, for these reasons I believe that the problem has something to do with the Traditional NI-DAQ Compatibility VI's.
I built machines that can have one or the other board (depending if it is low-end or normal). Does somebody knows the solution for this problem?
Thanks in advance.
Paulo Carmo
Attachments:
experiencia.vi ‏49 KB

Hello
For what I’ve seen on National web site, using the “Traditional compatibility VI’s”, it sould be possible to control a NI-DAQmx using code written in NI-DAQ Traditional. This information was obtained from the following NI link:
http://digital.ni.com/softlib.nsf/954feaeea92d90918625674b00658b83/9d67f671bcc6850586256e630059308b?...
Please read this information and then tell me something please.
Best regards!

Can you programmatically change the width of columns in a table control\indicator

Is it possible to programmatically change the width of columns in a table control\indicator ie to fit to width of the data or in my case the header information.

Create a property node (or reference) and use the 'Active Cell' property to select which column you want to change and then use the 'Cell size'--> 'Width' property to change the size.
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table.vi ‏33 KB

How can I programmatically change the fill color Settings of the Cwslide ActiveX Controls

In design mode (Visual Studio 6.0),I want to programmatically change the fill color in properties of cwslide ActiveX Controls.what's the command?
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cwslide.JPG ‏11 KB

First, if you want to start getting beyond the basics with DAQ, you are going to have to stop using the DAQ assistant and do it with lower level DAQmx VI's. There are hundreds of examples in the example finder. You can even right click on the DAQ assistant and select open front panel. That will create a subVI that you can open and see what is going on behind the scenes. Do it. I think you'll find the DAQ task is being recreated on each (though I'm not 100% of how the settings are established or maintained in each section of that subVI).
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Third, make sure you wire up your error wires.

Dual Numerical Control Change

Dear Friends
I have two Numerical Control in the FrontPanel. Now I want to program Numerical Controls such that when I changed one of them the other one change susequently.
for example in the attached VI when I set "A" to 1 "B" should be automatically 1 to and when I changed "B" from 1 to 5 "A" Should be changed to 5 automatically.
Sincerely V.S
Solved!
Go to Solution.
Attachments:
Dual Numerical Control.vi ‏9 KB

Hi, V.S
You have too much event structure in while loop.
It will run step by step.
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The program is not to work, because it wait others event occurs.
You can add more case in one event.
Patrick
Certified LabVIEW Developer
Attachments:
Dual Numerical Control.vi ‏17 KB

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HI!
I cannot disable mouse scrolling if I use a Slide and Digital Display has focus (see the attachement, please). What am I doing wrong?
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Hi,
This may be a stupid question. But in the attched slider control, I am unable to set the precision of the digital display. I can only set the precision of the scale. What do I need to do? Thanks.
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Horizontal Fill Slide (numeric control) question.vi ‏9 KB

In the upper left of the display format tab of the properties dialog box, select digital display.
I agree that it could be implemented better, for example if you right-click on the digital display ...display format. it should land on the dialog with the digital display selected. It currently does not.
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Numeric control error handling

Hi all,
I have two question about numeric control.
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I used property node to assign the range but my problem is that. I assigned min 0.1, max 1.2 and increment 0.1 but I cant able to select 1.2 or sometime 0.1 by using increment/decrement arrow. Maybe because of floating points? And also I want to do when user input overrange value (eg.1.3) by typing, the value should go back to previous valid input.
Any idea? Thanks

You can choose how LV will react on entries exceeding a limit. The default is, that LV coerces the value to the limit. But you can also ignore the limit and the user can enter any value.
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Regarding 2) i couldn't reproduce what you described. Maybe you should post a little example....
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CEO: What exactly is stopping us from doing this?
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Programmatically change numeric control increment

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