how get cluster element value change event

[GokulGKM]

hi,

       i have cluster .i chage any one of the value in cluter element .may i know about which element is changed using common value change event structure.

[Gregory]

Property node >> Control Label

Edit: Don't choose <All Elements> for the event source, choose which cluster element you want.

[altenbach]

You can easily create a seperate event for each cluster element.

[Ben]

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@Gregory wrote:

Property node >> Control Label

Edit: Don't choose <All Elements> for the event source, choose which cluster element you want.

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And if you want to get the new value you can cast the control reference to the proper type using a "to More Specific" node as you will see in this old nugget.

Ben

[altenbach]

What I sometimes do is compare old and new from the event data node using "not equal", convert the resulting boolean cluster to a boolean array (cluster to array) and search for the single true element (search array). The resulting index (typically wired to a case structure) will give you the element position in cluster order.

[Ben]

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@altenbach wrote:
What I sometimes do is compare old and new from the event data node using "not equal", convert the resulting boolean cluster to a boolean array (cluster to array) and search for the single true element (search array). The resulting index (typically wired to a case structure) will give you the element position in cluster order.

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I used that same approach on my first CLA exam!

Ben

[altenbach]

In each case, I unbundle the relevant element(s) and process accordingly.

[paul_cardinale]

When I have apps that need a lot of controls, I will sometimes nest event structures.  A case in the outer structure to capture all value changes for a cluster, and an inner one to separate value changes for individual cluster elements:

[altenbach]

Why do you even need the outer event structure?

I would strongly advise agains stacking event structures in general.

[GokulGKM]

You can easily create a seperate event for each cluster element.

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i know this way. why i asking this mean i have lot of even structure so need to reduce the number of event structure in my program.