Dialog ring and Event structure

[raghavendra]

Hi,

In my application, i am using a Dialog Ring from
classic control.The dialog ring has around 15-17
items in it.based on the user selection i am
calling a sub vi.

i am using a Event structure and using the event
on "value change".

we are able to call the sub vi when ever the user
changes the value, we are not able to call on the
existing value.

for example..if the dialog ring contains A to F
when ever user changes to the new value,the
required code is execuuted.say from Ato B or C,D,E,F.

if the current state is A, to call the sub vi for the
A...we have to change to B or others and then to A
then A code gets called and executes.

when the excution begins and the A is the default state
on click how can i execute the code that belongs to A

could you please suggest any way to slove the problem.

rags

[becktho]

Hi

Usually I solve this issue just by placing a simple "---" element on first position. So the user has to choose another element, which then starts the appropriate sub-vi.

Hope this helps.

Thomas

[raghavendra]

Hi Thomas

Thank you for the suggestion....

rags

[EdDickens]

This happens because selecting 'A' when it already is'A' is not a "Value Change".

I usually include as the first selection in the ring/list/enum something "Make a Selection". Then I reset the ring to this first state after each Case has run so the next selection will always fire the "Value Change" event.

Ed

[John Rich]

Without seeing your code it is not entirely clear as to what you are trying to do. Do you want to continuously run the loop with one setting of the ring until the value has changed, and then run the loop with that setting? If so then you should use a case structure instead of an event structure. Otherwise, the answers that you have been given will work. Another potential solution would be to set the initial value and trigger an event on the first iteration of the loop.

[Student_India]

hey.. i'm new in this field.. but the try.zip actually solved one of the fundamental doubts i was facing... thanks a lot.

[paul_a_cardinale]

Perhaps something like this would be helpful.