Using Virtual Earth in a WPF Application
- Posted: Jun 27, 2008 at 7:52 AM
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Marc Schweigert shows you how to use Virtual Earth in a WPF application by using a prototype WPF Virtual Earth control. You'll also see a walkthrough of how the prototype control was built.
You can download the prototype and sample application at http://blogs.msdn.com/devkeydet/archive/2008/06/24/wpf-and-virtual-earth-revisited.aspx.
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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!
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.
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