Windows Phone 7, Multi-Touch Behaviors and the Surface samples for Silverlight

I’ve just finished some experiments using the Windows Phone 7 emulator and the “Microsoft Surface Manipulations and Inertia Sample for Microsoft Silverlightin order to enable Multi-Touch gestures using Blend Behaviors:


This new implementation, now available for download in the Expression Gallery, permits to enable Multi-Touch gestures (the usual translation, rotation, zoom and inertia) on separate User Controls available in the same container.

In this way you can apply distinct Multi-Touch manipulations (inertia included) to single elements using a single code in xaml:

<Grid x:Name="ContentPanel" Grid.Row="1">
      <Image Source="Images/Desert.jpg" x:Name="image1">
               <WP7:MultiTouchManipulationBehavior IsInertiaEnabled="True" IsRotateEnabled="True" IsTranslateEnabled="True" IsScaleEnabled="True" MinimumScaleRadius="1" MaximumScaleRadius="720"/>

      <Image Source="Images/Jellyfish.jpg" x:Name="image2">
             <WP7:MultiTouchManipulationBehavior IsInertiaEnabled="True" IsRotateEnabled="True" IsTranslateEnabled="True" IsScaleEnabled="True" MinimumScaleRadius="60" MaximumScaleRadius="360"/>

Alternatively you can use Blend inserting a reference to the project MultiTouch.Behaviors.Silverlight.WP7 and then dragging the MultiTouchManipulationBehavior from the Assets section to the  control to be touch-enabled:

Multi-Touch Behavior Blend



This one has been an interesting exercise in porting code written for Silverlight to Windows Phone: I had only to create a Windows Phone 7 project and add to it the code already available for the Silverlight version and all worked well quite quickly.


At this time the behavior works only in the fixed Portrait orientation of Windows Phone: if you change to Landscape the manipulation doesn’t work well. I’ll have to investigate further and currently I don’t have a physical device to test (I’d really love to have a device to try it :)).

Happy Silverlighting!

Silverlight proof points: Smooth Streaming Technology, NBC Online Video Monetization and Highlights Creation for the 2010 Winter Olympics

It’s now available a great technical whitepaper that highlights the usage of Silverlight Smooth streaming technology to stream live and on demand content for the 2010 Winter Olympics.

This Whitepaper goes into the technical details on how NBC in US inserted midstream ads and monetized the online content.

This is a follow on to the 4 case studies that were published in May 2010 on how NBC USA, CTV Canada, France TV, and NRK Norway  have used Silverlight and Smooth Streaming technologies during the Winter Olympics.


The Technical Whitepaper covers the following topics:

A Solution Overview;

Clip Creation and Ad Insertion;

Rough Cut Editor;

Inserting Ads, Ad Templates, Ad Logic;

Ads delivered in VOD;

Monitoring Ads.



Click here to read the article and… Happy Silverlighting!

Windows Phone 7 Multi-Touch Behavior videos #wp7dev

Some time ago I’ve started a Codeplex project dedicated to multi-touch, available on Codeplex at

The goal of this project is to provide an unified interface for Silverlight, WPF and Windows Phone 7 in order to provide multi-touch support using a visual approach via the concept of Behavior available in Expression Blend.

Recently I had the honor to welcome in the project a pillar of the Silverlight community, Laurent Bugnion, who is working on the Windows Phone 7 version of the Behavior:

Laurent has just published on his blog two awesome videos to get started with this new Behavior, and has created a specific section on his site to announce updates and publish content.

A special thanks to Pete Blois of the Expression Blend team for his help and contributions.

Stay tuned as we’ll be posting updates very soon :)

Happy Silverlighting!

Enabling Multi-touch gestures in WPF using Expression Blend 4 RC and the TranslateZoomRotate behavior

I’ve already blogged about adding multi-touch support to Silverlight applications using Blend behaviors (you can also read my italian language article).

This is a powerful and simple approach which is now available in WPF using Expression Blend 4 RC and the TranslateZoomRotateBehavior.

Let’s try to build a simple example:

1 – Open Expression Blend and create a new WPF project:

 2 – Drag a Rectangle in the MainWindows.xaml:

3 – Let’s add multi-touch gestures and inertia effects to the rectangle selecting the Assets->Behavior tab and dragging the TranslateZoomRotateBehavior inside the rectangle:

4 – Let’s examine the Properties:

It’s possible to set the supported gestures (All, None, TranslateX, TranslateY, Rotate, Scale), the constrainToParentBounds modality, the Minimum, Maximum Scale and the Rotational and Translate Friction associated to the inertia.

Let’s select the constrainToParentBounds check box and run the project using the Project->Run Project menu:

Cool, Multi-touch and inertia effects are now enabled for the rectangle without writing a line of code!

And this is the generated xaml:

	xmlns=" 2006/xaml/presentation"
	xmlns:x=" 2006/xaml"
	xmlns:i=" 2010/interactivity"
	xmlns:ei=" 2010/interactions"
	Width="640" Height="480">

	<Grid x:Name="LayoutRoot">
		<Rectangle Margin="149,106,133,191" Stroke="Black">
				<ei:TranslateZoomRotateBehavior ConstrainToParentBounds="True"/>
				<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
					<GradientStop Color="Black" Offset="0"/>
					<GradientStop Color="#FF8F98CA" Offset="1"/>

The source code of the project is available for download here.

Microsoft Surface Toolkit for Windows Touch Beta available for download

The Microsoft Surface Toolkit for Windows Touch Beta is a set of controls, APIs, templates, sample applications and documentation currently available for Surface developers.

With the .NET Framework 4.0, Windows Presentation Framework 4.0 (WPF), and this toolkit, Windows Touch developers can quickly and consistently create advanced multitouch applications for Windows Touch PCs.

This toolkit also provides a jump-start for Surface application developers to prepare for the next version of Microsoft Surface. Use it to take advantage of the innovative Surface technology and user interface to develop your own rich and intuitive multitouch experiences for a variety of Windows Touch devices.”



Experiments with Multi-touch: A Windows Phone Manipulation sample

I’ve just updated the project on CodePlex to Silverlight 4 RC and added a new sample of multi-touch using Windows Phone 7 manipulation capabilities starting from this how-to available in MSDN – “How to: Handle Manipulation Events” –

The modified sample uses an Image to illustrate the possibility to move and scale objects in the Windows Phone emulator using the “ManipulationDelta” event:

These are the steps to follow in order to enable Scale and Translation gestures in a Windows Phone application:

  • Just create a new “Windows Phone Application” from Visual Studio and then add an Image control in the MainPage.xaml using this code
<Canvas x:Name="ContentCanvas" Grid.Row="1">
    <Image Source="Images/Desert.jpg" Canvas.Left="99" Canvas.Top="100"
           x:Name="image1" Stretch="Fill" Width="300">

  • Then add an event handler for the “ManipulationDelta” event for applying a Scale and a Translate transform using the CompositeTransform available in Silverlight 4:
public MainPage()

    SupportedOrientations = SupportedPageOrientation.Portrait | SupportedPageOrientation.Landscape;

    ManipulationDelta += image1_ManipulationDelta;
    _compositeTransform=new CompositeTransform();
    image1.RenderTransform = _compositeTransform;

private CompositeTransform _compositeTransform;

void image1_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
    // Scale
    if (e.DeltaManipulation.Scale.X!=0)
       _compositeTransform.ScaleX *= e.DeltaManipulation.Scale.X;
    if (e.DeltaManipulation.Scale.Y!=0)
        _compositeTransform.ScaleY *= e.DeltaManipulation.Scale.Y;

    // Translation
    _compositeTransform.TranslateX += e.DeltaManipulation.Translation.X;
    _compositeTransform.TranslateY += e.DeltaManipulation.Translation.Y;

The source code is available for download from CodePlex:

Happy Silverlighting!

Multi-Touch enabling Silverlight Simon using Blend behaviors and the Surface sample for Silverlight

I have already blogged about using Blend behaviors to add Multi-Touch gestures and inertia effects to a generic Silverlight user control, so I wanted to use the same approach to add the same behaviors to the CodePlex project Simon.

I think that inserting multi-touch manipulation effects to a Silverlight application using Blend behaviors is an elegant way which makes the code very clear and readable.

To start you need to download the Multi-touch manipulation and inertia behavior (wow, more than 7000 downloads, great feedback! :)), which I already published on the Expression site.

This behavior is based on the code available in the Microsoft Surface Manipulations and Inertia Sample for Microsoft Silverlight, in my opinion the best example available for using multi-touch in Silverlight at this time.

The solution available contains a project named “MultiTouch.behaviors.Silverlight” which must be included in your application to enable the multi-touch functionalities.

To make the Silverlight/Blend Behavior work with Simon I’ve modified some code relative to the Zoom gesture in order to use a ScaleTransform (check out the source code on CodePlex:

To use the Behavior in XAML just add a reference to the “MultiTouch.Behaviors.Silverlight” project and use the following code:

<UserControl x:Class="SimonSilverlight.MainPage"
    xmlns:interactivity="clr-namespace:System.Windows.Interactivity; assembly=System.Windows.Interactivity"
    xmlns:multitouch="clr-namespace:MultiTouch.Behaviors.Silverlight; assembly=MultiTouch.Behaviors.Silverlight">
    <uc:Simon x:Name="Says">
            <multitouch:MultiTouchManipulationBehavior InertiaEnabled="True" TouchRotateEnabled="True"
                       TouchScaleEnabled="True" TouchTranslateEnabled="True"/>

Since we are using a Blend Behavior, we can also open the solution in Expression Blend, select the “MultiTouchManipulationBehavior” from the “Assets” section and drag it over the Simon control:

Happy Silverlighting!

A Silverlight / Expression Blend behavior to add Multi-Touch Manipulation and Inertia

I’ve updated the behavior available in the Expression Community gallery adding Multi-Touch manipulation (translation, rotation and zoom) and inertia effects using code from the Surface Manipulations and Inertia Sample for Microsoft Silverlight.

To enable Multi-Touch in your code simply download the behavior from here, add the project “MultiTouch.Behaviors.Silverlight” to a Visual Studio solution and then enable the gestures in XAML:

<UserControl x:Class="SilverlightMultiTouch.MainPage"
xmlns:interactivity="clr-namespace:System.Windows.Interactivity; assembly=System.Windows.Interactivity"
xmlns:behaviors="clr-namespace:MultiTouch.Behaviors.Silverlight; assembly=MultiTouch.Behaviors.Silverlight"

  <Image Source="Images/Desert.jpg">
         <behaviors:MultiTouchManipulationBehavior InertiaEnabled="True" TouchRotateEnabled="True" TouchTranslateEnabled="True" TouchScaleEnabled="True"/>

  <Image Source="Images/Jellyfish.jpg">
         <behaviors:MultiTouchManipulationBehavior InertiaEnabled="True" TouchRotateEnabled="True" TouchTranslateEnabled="True" TouchScaleEnabled="True"/>

The MultiTouchManipulationBehavior also contains some dependency properties (TouchRotateEnabled, TouchTranslateEnabled, TouchScaleEnabled and InertiaEnabled) to enable the corresponding gestures.

The example contains Multi-Touch manipulations applied to some Image controls and a Smooth streaming player of the Silverlight Media Framework.

I’ve also posted to CodePlex a sample using WPF 4 based on the article “Introduction to WPF 4 Multitouch” by Jaime Rodriguez.

Hope this helps and Happy Silverlighting!

Microsoft Surface Manipulations and Inertia Sample for Silverlight available for download

Just to point out this [awesome!] download available from the Microsoft Surface team, intended only for educational purposes.

From the main site:

"Multitouch support in Windows 7 allows applications to blur the lines between computers and the real world. Touch-optimized applications entice users to touch the objects on the screen, drag them across the screen, rotate and resize them, and flick them across the screen by using their fingers. The manipulations and inertia processor classes allow graphical user interface (GUI) components to move in a natural and intuitive way. Manipulations enable users to move, rotate, and resize components by using their fingers. Inertia enables users to move components by applying forces on the components, such as flicking the component across the screen. The contents of this sample are covered by the Microsoft Surface SDK 1.0 SP1 license agreement, with any additional restrictions noted in the Readme file. The purpose of this download is educational use only and is made available "as-is" without support."

Thanks to Jesse Bishop and SilverlightShow for the link!