How can I set the relevant property of an Orbeon element to depends on if a previous element is visited or not?

Question

I am trying to create in a form some elements that are visible if one specific element has been visited or not. Is it possible?

At this moment, I only can achieve this c

Answer 1

Since Orbeon Forms 4 there is:

• the xxf:visited() function
• the xxforms-visited and xxforms-unvisited events

You have to be careful with dependencies when using the function, especially on xf:bind.

I tried to build a naive example, but it turns out that it doesn't work and I entered an issue.

Here is a workaround, which requires adding a custom XForms instance:

<xf:bind id="control-5-bind" ref="control-5" name="control-5"
    relevant="instance('visited') = 'true'"/>

<xf:instance id="visited"><visited/></xf:instance>
<xf:setvalue event="xxforms-visited"   observer="control-4-control" ref="instance('visited')" value="'true'"/>
<xf:setvalue event="xxforms-unvisited" observer="control-4-control" ref="instance('visited')" value="'false'"/>

And here is the complete example.