Zoomable Canvas Control
Kael has a nice series on the Zoomable Canvas control
The usage is something like
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<ZoomableCanvas Loaded="ZoomableCanvas_Loaded"
RealizationLimit="1000"
RealizationRate="10"
RealizationPriority="Background"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
(Move the Slider right to see it in action)
(this is an xbap in an iframe. Would require IE\FireFox with .NET4 on your machine)
Slide the slider right to populate the canvas. You can zoomin\out using the mouse scroll.