Microsoft Surface – Porting from v1 to v2

A couple years ago, I wrote Surface Craps during RECESS to explore the Microsoft Surface table and APIs.  Now that Surface 2 is out, it’s time to upgrade the software to run on the new hardware.  This is the first in a series of blog posts about the process in upgrading from Surface v1 to v2.

Obviously this first requires that you have the Surface 2 SDK installed.  To start, I branched the project tree in TFS to make a v2 copy.

Open the project in VS 2010.  Update the project references.  The new referenced assemblies are in C:\Program Files (x86)\Microsoft SDKs\Surface\v2.0\Reference Assemblies.

  • Microsoft.Surface.dll
  • Microsoft.Surface.Presentation.dll
  • Microsoft.Surface.Presentation.Generic.dll

I was using Visual State Manager from the WPF Toolkit, and now it’s included in WPF 4, so I removed that reference as well.

Now we start the brute force process of fixing code that doesn’t compile.  Here’s a list of what I found.  Many of these changes are moving to WPF 4 in general, since it’s where we get most of the touch functionality in the Surface 2 environment.

Control Name Changes

Surface v1 Surface v2
SurfaceUserControl UserControl
SurfaceContentControl ContentControl

Event Handling Changes

Surface v1 Surface v2
ContactDown event use TouchDown
(Preview)ContactUp/Down use (Preview)TouchUp/Down
ContactDown event use TouchDown
(Preview)ContactUp/Down (Preview)TouchUp/Down
ContactChanged TouchMove
ContactEventHandler EventHandler<TouchEventArgs>
ApplicationActivated, etc. OnWindowInteractive, Noninteractive, Unavailable (see a default new Surface 2 project for an example of these event handlers)
ApplicationLauncher.Orientation ApplicationServices.InitialOrientation

Property / Method Changes

Surface v1 Surface v2
e.Contact.IsTagRecognized e.TouchDevice.GetIsTagRecognized( ). (add using statement for Microsoft.Surface.Presentation.Input to get the extension method)
e.Contact.Tag.Byte.Value e.TouchDevice.GetTagData().Series & .Value
e.Contact.GetPosition( ) e.TouchDevice.GetPosition( )
e.Contact.GetOrientation( ) e.TouchDevice.GetOrientation( )
ScatterViewItem.IsActive ScatterViewItem.IsContainerActive

Manipulation Processing

In Surface v1, you would use the Affine2DManipulationProcessor to handle gestures such as flick, rotation, scale, etc.  In v2, you just use the manipulation processing that’s provided by the WPF 4 UIElement.

Surface v1 Surface v2
On any elements that you want to track manipulations on, set IsManipuliationEnabled = true
BeginTrack( ) nothing to do in v2
Affine2DManipulationCompleted, … events UIElement.ManipulationCompleted, … events
e.Velocity.Length e.FinalVelocities.LinearVelocity.Length
e.TotalTranslation.X e.TotalManipulation.Translation.X

Resolution

That’s all I had to as far as API differences.  Next came the resolution differences. The Surface v2 display runs at 1920 x 1080, so if you have any UI that does not stretch or any hardcoded coordinate-based math in your software, it will have to be updated.

Tags

Surface v2 does not support Identity tags, but it does support Byte tags.  See the tag-related methods above for the API differences.

For Surface Craps specifically, I ran into a problem with the transparent dice we got from Microsoft for Surface v1. The dice have byte tags on them that are practically transparent, but have enough IR reflectivity to be picked up by the Surface v1 infrared cameras.  In Surface v2, the tags are recognized by interpreting the contact information using PixelSense technology, and something in that processing is not recognizing the mostly transparent tags on the dice.  I will continue to investigate this issue and write another post if I have any update.  For now – it’s a bummer that the physical dice do not work.

Installation

In a future post I will talk about the differences in what it takes to install your application in Surface v2…

 
 
 

One thought on “Microsoft Surface – Porting from v1 to v2

  1. Pingback: Microsoft Surface – Installing an App on V2 | InterKnowlogy Blogs

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>