Blog Posts from November 13, 2008 (page 1 of 1)

IronPython and WPF Part 1: Introduction

I decided to start my IronPython and “veritable universe of cool technologies” examples with WPF. I figured that since we already have Silverlight support, there might be some overlap (there was). Futhermore, after seeing BabySmash on Surface I’m jonesing to build a Surface app of my own. Getting vanilla WPF working with IPy seems like a smart step before trying to build a Surface WPF app with IPy.

WPF is all about cool graphics, so I decided to build a photo viewing app. Kinda boring, I know. But it turns out my wife has posted hundreds of photos to her WL Space, and WL Spaces provides convenient RSS feeds of both photo albums as well as photos in specific albums. So I built out a simple WPF based photo viewer for my wife’s WL Space photos in IronPython.

TechieWife Photo Viewer screenshot

As you can see, I’m not quitting my job to go pursue a career in design anytime soon. But hey, the point is demonstrate building a WPF app in IPy, not to be a great designer. Plus, don’t those cute kids make up for the ugliness of the app?

Turns out building this app in IPy was fairly straightforward, with a few pitfalls. I wasted half a day digging thru data binding before realized that data binding against IPy objects works out of the box – but only if you type the case of the property correctly (Title != title). Also, I couldn’t make TypeConverters work the way I wanted, but python list comprehensions made it enough to transform the feed data before binding it to the UI. That approach worked great for this scenario but maybe not so much for others. (I’ve got feelers out to the WPF data binding wonks, so maybe there’s still hope for type converters)

Over the next several posts, I’m going to show you all the code for this app. It’s pretty small, only about 50 lines of app-specific python code + 50 lines of XAML to describe the window. There’s also some reusable code – 50 lines of WPF module code (mostly stolen from avalon.py in the IPy tutorial), 200 lines of xml2py code which I’ve discussed before and a very small C# based assembly to make accessing WPF elements by name very pythonic.

IronPython and [Insert MSFT Technology Here]

Now that PDC08 is in my rear view mirror, I’m back to doing IronPython stuff. One of the things I’m looking at is making IronPython work with a variety of Microsoft technologies. Given the usage of dynamic languages in web scenarios, most of our focus to date has been on using Iron languages in Silverlight. Being able to program the browser with the same language you program the server is a fairly compelling scenario. We’re also starting to see new progress on ASP.NET support for Iron languages.

But those are only two out of a veritable universe of cool technologies. Now that I’m done with PDC, I can start to explore some of the others. Some ideas include:

  • IPy and WPF
  • IPy and Surface
  • IPy and XNA (desktop only – Xbox and Zune use the Compact Framework with doesn’t support DLR)
  • IPy and WCF
  • IPy and WF

Any other suggestions? Please leave them in the comments.