I am afraid that currently the ScrollView widget does not support vertical re-sizing. Actually the scenario which you are trying to implement suggests using different mobile Views.
As a possible workaround I can suggest you to distribute the content into different Views, hook up to the swipe event
and navigate to
the prev/next View when the user swipes.
The downside of this approach is that you will not have the page transition available in the ScrollView widget.
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