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Twilight Source Code Published

Posted in Silverlight | Twitter at Monday, January 26, 2009 10:21 AM Pacific Standard Time

This afternoon I put the Twilight source code up on CodePlex. Twilight is the Silverlight Twitter Badge that I created from my AgFeedReader Mix 10k contest entry. You can download the source and I also packaged up the Xap file along with support files if you don’t want to bother with the code.

I haven’t been able to get it to work when the xap isn’t hosted on the same server as the page itself, so for now there is no hosted scenario. Perhaps I’ll have to create some other proxy like Silvester uses. If you have any good ideas feel free to suggest them or better yet contribute to the project.

In my previous post on the subject I wrote that I was using the LinkLabel control to create the text with the linked embedded in it. There was also an external WrapPanel control that came with the LinkLabel source. However, in the end I switched to using a custom wrap panel that was based on the Silverlight Toolkit WrapPanel but was a much lighter version (I only need horizontal wrapping). I also found another issue with the LinkLabel control and after spending some time trying to fix it I decided that it also was overkill for what I needed. So while I used some of the same ideas I ended up writing some new code to handle this (I did credit both of these projects in both the source code and on the codeplex page).

TestsI also gave the Silverlight Unit Test Framework a try and the source code includes a test project. This was my first real experience with the framework and I definitely found it very useful. If you haven’t used it before I highly recommend Jeff Wilcox’s introduction post on the framework. It was very easy to use and I actually found a few bugs in my code through my tests (I didn’t do full TDD on this project but next time I think I will). When you run the test project it loads up right in the browser and runs the tests. I didn’t do very much UI testing, but I did test my wrap panel implementation by using the TestPanel that is part of the framework. That allowed me add TextBlocks and measure their size to determine how big my panel should be. Then I added an instance of my panel to the TestPanel to test it. This feature is very nice since measuring doesn’t work right unless the child is actually in the control tree, that that alone makes the test framework worthwhile. Even better was the fact that I didn’t have to modify a single line of code in my real project in order to allow the test framework to work. Well done!

exampleNoSl I also did some work to create a decent install experience after reading Tim Heuer’s several posts on the subject. If you don’t have Silverlight installed you will get an image that looks like the actual application but has a prompt to install Silverlight. I didn’t spend much time on this part, but it is a lot better than the big giant button you normally would get.

There is still lots of room for improvement and I would like to figure out the remote hosting option as well as create some cool animation for loading. But for now it is a very light weight (13k) Silverlight Twitter Badge.


Tuesday, January 27, 2009 2:16:44 AM (Pacific Standard Time, UTC-08:00)
I just downloaded the bits and put it on my blog home page. This badge works great and is a terrific example of how to build connected applications in Silverlight. Thanks for taking the time to build it!
Wednesday, January 28, 2009 12:17:21 AM (Pacific Standard Time, UTC-08:00)
How often does Twilight call back to get new updates. It seems like it's pretty often. I've found that if I have my blog up in my browser and am running *chirp on my desktop, I frequently surpass the 100 updates per hour limit. You might want to consider implementing a setting where I can define how often I was Twilight to check for updates or even let me choose the option to put a manual 'Refresh' button on the app itself.
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