tree fe70c2ac3a8303945a0a455dc981edf7e035dca0
parent 2aa9bb2be7d5a710c3e6428d77d1a93bd0d8f5c3
author amirh <amirh@users.noreply.github.com> 1518561603 -0800
committer GitHub <noreply@github.com> 1518561603 -0800
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ScaffoldGeometry plumbing. (#14580)

Adds a ScaffoldGeometry class and ValueNotifier for it.
A scaffold's ScaffoldGeometry notifier is held in the _ScaffoldState, and is passed to _ScaffoldScope.
New ScaffoldGemometry objects are built and published to the notifier.