Return a Value in an Array that was Clicked on with a Mouse.

[Scott_G]

Overview

This example demonstrates determining which element of an array was clicked and returning that value.

Description

An event structure is used to detect a mouse click. Using the control reference provided by the event structure, there are two methods to extract the value of the element clicked for the generic array. The first method uses the To More Specific Class function. You will need to provide the Target Class constant to match the data type of the array. This will produce the proper reference to provide to a property node for the value. The second method uses the Variant to Data function to convert the value into the proper data type. For the Boolean array, the value change can be detected with the Event Structure. The changed value and the index of the changed element is determined by comparing the previous and current arrays.

Requirements

• LabVIEW 2012 (or compatible)

Steps to Implement or Execute Code

1. Create an Event Structure to detect the Mouse Down and Boolean Array Value Change events
2. Use a property node to extract the Array Element property
3. Create a case structure to handle the 2 approaches to extracting the value from a generic array
4. For the Boolean array, compare the old and new arrays to extract the value changed and the index of the changed value.

Additional Information or References

Front Panel

Block Diagram

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