Dynamic binding to a list

Ignition
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1

I'd like to create a binding, when a component's property depends on the list of other component, whose reference numbers are given in the form of a string (or a dataset). I could compile the expression string from the list of numbers in a script by runScript(). But, is there a way to evaluate that string later into a binding expression, using something similar to the tag() function, but with more than one tag?

eval(runScript("project.compExpr", 0, {Component.dependList} )) // Tag1/BoolValue || ... || TagN/BoolValue

The reason I'd like to evaluate the string instead of simply computing the value in the script is that the listed components' properties are also bindable, so the string I compile needs to be reevaluated every time when they change.

Alternatively, can I "create" a binding in the script?

1 Like
2

Hi! I’m looking for a way to create a binding in a script. Did you solve this problem?
Anybody?

3

You can dig around in the JavaDocs, probably starting here. Then looking at the InteractionController on each window. (Bindings are part of the window, not the component.)

4

I’ve just posted a solution for the Designer context, that can be used, for example, for batch processing of multiple components, when templates are inapplicable:
http://forum.inductiveautomation.com/t/is-it-possible-to-change-binding-with-scripting/11882/3?u=readywebsolutions

5

do you think it is possible in Perspective?

6

I have not spent enough time under the hood of perspective yet… All of the above is Vision-specific.

7

To create a binding in Perspective, you just need to modify the view.json file on disk on the gateway with (valid) JSON structure.