Identifying which DocumentWindow just changed state to floating

Hi Nathan,

The e.DockHostChild of that event will pass the FrameworkElement being dragged.  Note that this could be a single docking window (if drag float previews are enabled), a ToolWindowContainer (one or more tool windows), or even a Workspace containing MDI (for a document).  You'd have to examine those and see which docking windows are part of them.

Thank you for the info! It helped me get the rest of the way to my answer. For others interested in the full solution to the riddle, here's how to dig down to a DocumentWindow when one is dragged to a floating position:

Your handler for the FloatingWindowOpening event will be passed a FloatingWindowOpeningEventArgs called e

e.HostChild will be a Workspace in the case of a DocumentWindow (As stated above)

If e.HostChild is a Workspace then Workspace.Content will be a TabbedMdiHost

And TabbedMdiHost.Child will be a TabbedMdiContainer

And TabbedMdiContainer has a property named SelectedWindow which will be the the DocumentWindow or DocumentWindow subclass that the user dragged to a floating state.

Hopefully, that'll help someone out there to solve the riddle faster than I did.