SCREENCAST: Using Virtual Earth in a WPF Application

As promised, here is the screencast for my previous post:

http://channel9.msdn.com/posts/keydet/Using-Virtual-Earth-in-a-WPF-Application/

Published 27 June 08 09:24 by marcsc

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# AppStar said on June 30, 2008 4:13 PM:

(Reposted from Channel9)

Great Screencast!

I played around with Virtual Earth and WPF a while back but ran into Z-Order and DOM issues. Looks like the latest version of the WPF browser control and your "layered window trickery" solves most of the issues.

However, I think the real power in doing something like this would be XAML pushpins with dynamic colors and numbers. I imagine just keeping the hidden top layer buttons visible and using a small transparent gif for the ve pushpin would do it. You'd lose the pushpin mouseover but I guess you could use the button mouseover event at that point. A custom dashboard would be needed to prevent the XAML buttons from covering it as well.  Any other thoughts? Thanks!

# marcsc said on July 1, 2008 10:23 AM:

I actually had WPF pushpins originally, but chose not to go that route.  That's not to say you couldn't.  In fact, I actually use an invisible (Opacity=".01") WPF button over the pushpin rendered by the map.  That's how I chose to implement the ability to hover over the pushpin and get a WPF InfoBox (implemented as a UserControl).  If you really want to have WPF based pushpins, just comment out line 387 in VEMap and comment out line 401 which is the call telling VE to add the pushpin.

I chose not to use WPF pushpins for two reasons.  First, it seemed like overkill to render such a small UI element as a vector graphic since pushpins are typically fixed width and height.  Second, due to the delay in event notification between JavaScript & managed code, the repositioning of the pushpins is a little “jerky.”  So I am a bigger fan of drawing your pushpins with a vector drawing tool, and then saving them as bitmaps.  You get the same visual experience with better overall perf.  Your mileage may vary.

-Marc

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