LabVIEW
Need help displaying message to user
Solved!
I need to create a VI with a cluster of six buttons labeled Option1…Option6. When executing, the VI should wait for the user to press one of the buttons. When a button is pressed, use the Display Message To User Express VI to indicate which option was selected. Repeat this process until the user presses the Stop button. I have everything working except after I close the messages that show what options are pressed and press new buttons, the new messages for the new buttons won't pop up unless I stop the VI and run it again with the new buttons pressed. In other words the messages are only triggered based on the state of the buttons when I run the vi. I need to have it continuously updating. I attached some images of my vi.
image.png
Screenshot 2025-03-12 at 5.23.18 PM.png
Hi adam,
why do you wire "i" to the case selector?
Where do you "wait for the user to press a button"? (Shouldn't there be en event structure?)
Why don't you use a RadioButton control with 6 "options"?
Why do you attach only images (even downscaled and unreadable) instead of code?
Edit:
This seems to be a very common homework as can be seen here…
@adamwarlock wrote:
I need to create a VI with a cluster of six buttons labeled Option1…Option6. When executing, the VI should wait for the user to press one of the buttons. When a button is pressed, use the Display Message To User Express VI to indicate which option was selected. Repeat this process until the user presses the Stop button. I have everything working except after I close the messages that show what options are pressed and press new buttons, the new messages for the new buttons won't pop up unless I stop the VI and run it again with the new buttons pressed. In other words the messages are only triggered based on the state of the buttons when I run the vi. I need to have it continuously updating. I attached some images of my vi.
- As has been said, we cannot debug blurry pictures, attach your VI instead.
- Assuming only one option (or none) can be selected at any time, a radiobutton control would simplify (as has been mentioned).
- Because [i] only start at zero when you start the VI and it will eventually go to infinity and you are seacrhing way outside the size of the array.
- You have way too much duplicate code! It seems to me you have six nearly identical cases. All you probably need is one. I am absolutely sure you don't need any express VIs!
- Why do you use a shift register if you are never ever using it's stored output on the left?
- Why are all your front panel fonts underlined?
- Be careful with words like "continuously updating" I am sure you don't want to popup the same message over and over, even if the selection does not change. (hint: event structure)
- Again, If you want more specific help with your homework attach your VI.
- etc.
@aeastet wrote:
Here is what I would do.
It is really bad form to attach a different VI with an identical name to the one that was posted earlier by a different user. I would not do that. 😄
(In order to tell which one is which, I need to remember in what order they got downloaded because the second one will be renamed by the browser to "Problem (1).vi")
Here's what I would probably do (look ma! No express VIs!):
altenbach_0-1741892335591.png
The case will be true whenever the control has changed (or something has already been selected on first run).
Yes, once you learn a bit more, an event structure would be better, but requires some tweaks.
You also need to decide if "no selection" should be allowed.
Personally, I don't like popups because they will stall the VI. Maybe all you need is display the selection in an indicator
And if you allow multiple booleans to be true, here's how to do the event structure that tells you what just changed and how.
altenbach_0-1741894047928.png
See if it can give you some ideas...
altenbach_0-1741893781219.png
