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Triggering an action based on a component's custom property change

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Posted on by lorensimon

Is there any way to trigger an action (for instance Navigate) based on the change of a component's custom property in the app?

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bobesponja 258 on at

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When creating or editing a custom property, you can have it trigger an action in the component's OnReset property by checking "Raise OnReset when value changes" in the custom property settings. (If this is for a custom property you've already created, you can edit the settings by selecting its data type under Custom Properties).

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lorensimon 12 on at

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I use "OnReset" to pass the variable with the button pressed in the component, but if I want for instance to navigate to a page based on that variable, I do not see a way to do it.

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bobesponja 258 on at

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If it's not possible to set a variable to a page that you pass into Navigate, your best bet is to use a Switch statement based on that variable for each page.

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lorensimon 12 on at

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Thanks for the suggestion. Still I am not clear to what event I would map the Switch statement, since the only triggering event is the change of the custom property of the component.

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bobesponja 258 on at

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From what I understand, you're using the OnReset event to set/pass a variable that helps you decide what page you want to Navigate to. If this variable is a string describing the page, you can do this:
Switch(VariableName, "MainPage", Navigate('Main Page'), "Settings", Navigate('Settings'), "SecretPage", Navigate('Secret Page'), Notify("ERROR: page name not recognized", NotificationType.Error) // default response if it doesn't match )

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lorensimon 12 on at

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maybe I am not explaining myself well enough, or I am missing some foundational knowledge. What I am trying to do is trigger an action within the screens based on the change of a custom property of the component.
From my understanding of the OnReset event, that will drive a behavior of the component. To give even more context, I only have the navigation header as a component. I can follow the example of the switch command, just would not know where to attach it in the screens.

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lorensimon 12 on at

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Update: I just enabled some additional experimental feature, and I see that there is an additional custom property type "behavior" besides, input/output. That sounds like what I was looking for. I am going to experiment the experimental feature.

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