Do you recognize this man?
That’s Charles Petzold! Looking stylish with the cover of his free ebook on his tee shirt. It’s a draft preview of his upcoming book (to be published in the fall): Programming Windows Phone 7 Series. This preview ebook contains six chapters in three parts (153 pages total):
Part I Getting Started
Chapter 1 Phone Hardware + Your Software
Chapter 2 Hello, Windows Phone
Part II Silverlight
Chapter 3 Code and XAML
Chapter 4 Presentation and Layout
Part III XNA
Chapter 5 Principles of Movement
Chapter 6 Textures and Sprites
Here’s a quick excerpt from the ebook:
Phone Hardware + Your Software
Sometimes it becomes apparent that previous approaches to a problem haven’t quite worked the way you anticipated. Perhaps you just need to clear away the smoky residue of the past, take a deep breath, and try again with a new attitude and fresh ideas. In golf, it’s known as a “mulligan”; in schoolyard sports, it’s called a “do-over”; and in the computer industry, we say it’s a “reboot.”
A reboot is what Microsoft has initiated with its new approach to the mobile phone market. On February 15, 2010, at the Mobile World Congress in Barcelona, Microsoft CEO Steve Ballmer unveiled the Microsoft Windows Phone 7 Series and promised a product introduction in time for year-end holiday shopping. With its clean look, striking fonts, and new organizational paradigms, Windows Phone 7 Series not only represents a break with the Windows Mobile past but also differentiates itself from other smartphones currently in the market.
For programmers, the news from Barcelona was certainly intriguing but hardly illuminating. Exactly how do we write programs for this new Windows Phone 7 Series? Developers detected a few hints but no real facts. The really important stuff wouldn’t be disclosed until mid-March at MIX 2010 in Las Vegas.
Silverlight or XNA?
Intelligent speculation about the application platform for the Windows Phone 7 Series has gravitated around two possibilities: Silverlight and XNA.
Since about 2008, programmers have been impatiently awaiting the arrival of a mobile version of Silverlight. Silverlight, a spinoff of the client-based Windows Presentation Foundation (WPF), has already given Web programmers unprecedented power to develop sophisticated user interfaces with a mix of traditional controls, high-quality text, vector graphics, media, animation, and data binding that run on multiple platforms and browsers. Many programmers thought Silverlight would be an excellent platform for writing applications and utilities for smartphones.
XNA—the three letters stand for something like “XNA is Not an Acronym”—is Microsoft’s game platform supporting both 2D sprite-based and 3D graphics with a traditional game-loop architecture. Although XNA is mostly associated with writing games for the Xbox 360 console, developers can also target the PC itself, as well as Microsoft’s classy audio player, the Zune. The 2009 release of the Zune HD particularly seemed to suggest a mobile future built around the device’s revamped graphics and multitouch navigation. For many Zune HD users, the most disappointing feature of the device was its inability to make phone calls!
Either Silverlight or XNA would make good sense as the application platform for the Windows Phone 7 Series, but the decision from Microsoft is:
The Windows Phone 7 Series supports programs written for either Silverlight or XNA. And this we call “an embarrassment of riches.”
Charles is at MIX; say hello and ask him about programming for the Windows Phone. And enjoy, everybody!