Change Data-Type Column From Read-Only

[jacobson3]

We should be able to change the Data Type column in Define Columns.vi to allow for user edits directly from the table. If we set the read-only boolean to FALSE we need to make the increment/decrement and label not visible on the control and also make changes to the callback VI to check whether the channel would be valid. I tested the callback edit below and it does seem to work but I'm not sure if it's too kludgey.

All of the code within the true statement of the case structure is in the current implementation. The addition is between the unbundle by name and that case structure and basically tests whether the configuration would be valid with the same VI used for checking validity in the channel editor.

In the false case we should probably just bundle the line validation string into the error but I just tested with a 1 button dialog.