Multi-level Semantic Zoom Control

[hawkerm]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  <!-- Please search GitHub for a similar issue or PR before submitting -->
[x] Feature request <!-- Please file a UserVoice request and include the link below https://wpdev.uservoice.com/forums/110705-universal-windows-platform/category/193402-uwp-community-toolkit -->
[ ] Sample app request
[ ] Documentation issue or request
[ ] Question of Support request => Please do not submit support request here, instead see https://github.com/Microsoft/UWPCommunityToolkit/blob/master/contributing.md#question

UserVoice link

https://wpdev.uservoice.com/forums/110705-universal-windows-platform/suggestions/18662884-multiple-levels-of-semantic-zoom (looks like there was confusion on what was requested initially and it was merged with another idea, i.e. ignore comments on MultiScaleImage. The requester was specifically talking about SemanticZoom and it supporting more than 2 templates, as was the title of the request.)

Related to #770 as well.

Current behavior

SemanticZoom control only supports two levels of zooming.

Expected behavior

Support N group levels.

[touseefbsb]

I like this idea can be very powerful in a lot of scenarios. I wonder why this isnt as active.

[gbarcho]

Whats the status?

[MohammadRoshani]

https://stackoverflow.com/questions/52455775/how-can-used-semantic-zoom-for-3-level-in-uwp/52464082#52464082

[michael-hawker]

Thanks @MohammadRoshani for the link, this is a direct link to the blog. Seems like the solution was to create a new control based off of another container like Grid and also have it implement the ISemanticZoom interface.

I could see where we could have a container like Grid but provide attached properties to help with the linking or something similar to connected animations. I'm just not sure how custom this scenario is.

I'll leave this open for now, but think we'd need more input on scenarios for use.