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Add easing effects on your animations with WPF 4 easing functions

Maxime LAMURE — Tue, 10 Nov 2009 21:02:45 GMT

One of the new features of WPF 4 is the presence of easing functions. Already available with Silverlight 3, these functions allow you to play with acceleration or deceleration on your animations. The following sample illustrates how to add elastic behavior on image size animation.

An easing function applies formula to obtain an acceleration or deceleration effect. A “mode” option allows you to set when to apply the formula: at the beginning (EaseIn), at the end (EaseOut) or both (EaseInOut).

For our sample, the following graph demonstrates the different values of EasingMode, where f(t) represents the animation progress and t represents time (msdn source).

By default, WPF 4 contains the following functions:

BackEase
BounceEase
CircleEase
CubicEase
ElasticEase
ExponentialEase
ExponentialEase
PowerEase
QuadraticEase
QuarticEase
QuinticEase
SineEase

For more information about easing functions: http://msdn.microsoft.com/en-us/library/system.windows.media.animation.easingmode(VS.100).aspx

The source code is available here:

Ajouter des effets d’accélération sur vos animations avec les « easing functions » de WPF4

Maxime LAMURE — Sat, 31 Oct 2009 21:28:00 GMT

Une des nouveautés de WPF 4 est la présence des « easing functions ». Déjà présentes avec Silverlight 3, ces fonctions permettent de jouer sur les effets d’accélération de vos animations. L’exemple ci-dessous permet, par exemple, d’ajouter un effet élastique lors de l’agrandissement d’une image :

Une « easing function » applique une formule afin d’obtenir un effet d’accélération ou de décélération. Un mode permet de spécifier à quel moment est appliquée la formule : au début (EaseIn), à la fin (EaseOut) ou les deux (EaseInOut).

Pour notre exemple, voici les courbes correspondantes avec f(t) qui représente la progression de l’animation et t le temps (source msdn).

Voici la liste des fonctions disponibles:

BackEase
BounceEase
CircleEase
CubicEase
ElasticEase
ExponentialEase
ExponentialEase
PowerEase
QuadraticEase
QuarticEase
QuinticEase
SineEase

Pour plus d’informations sur ces fonctions : http://msdn.microsoft.com/en-us/library/system.windows.media.animation.easingmode(VS.100).aspx

Le code source est dispo ici :

Partage de ressources entre Silverlight et Windows Presentation Foundation

Maxime LAMURE — Thu, 23 Jul 2009 16:23:05 GMT

Cet article, coécrit avec Luc VoVan (http://blogs.msdn.com/luc), présente différentes solutions liées aux problèmes de partage de ressources et de code source entre une application WPF et Silverlight.

N’hésitez pas à donner votre avis sur cet article ou partager votre retour d’expérience.

Lien direct pour le télécharger :

WF: How to add your own task in the workflow runtime engine batching mechanism ?

Maxime LAMURE — Sat, 23 Jun 2007 00:51:00 GMT

The goal of this post is to describe the mechanism to create and add your own service in the workflow runtime engine.

Situation: You would like that each time the SqlWorkflowPersistenceService is called by the workflow runtime, it call your own service, in a transactional scope (if your service or the persistence service failed, a rollback is apply).

1: You have to create your service:

Create a class (in a separate project) wich implements IPendingWork. Add reference of this project in the host and workflow project.

namespace TransactionalService
{
public class TransactionalService : IPendingWork
{
   void IPendingWork.Commit(System.Transactions.Transaction transaction, ICollection items)
   {
      foreach (MyExternalDataEventArgs request in items)
      {
         Console.WriteLine(request.Commande.Nom);
      }
   }

   bool IPendingWork.MustCommit(ICollection items)
   {
      return true;
   }

   void IPendingWork.Complete(bool succeeded, ICollection items)
   {
      Console.WriteLine(succeeded);
   }
  }
}

2: Add your service in the workflowruntime

In your Host:

…
workflowRuntime.AddService(new TransactionalService.TransactionalService());
workflowRuntime.StartRuntime();

3: add your pending work items to the current work batch

In your Workflow:

TransactionalService.TransactionalService service = new TransactionalService.TransactionalService(); //Or by the getService()

WorkflowEnvironment.WorkBatch.Add(service, MyArgs);

When the runtime engine batching will be executed, he will call all services which implements IPendingWork (SqlTrackingService, SqlWorkflowPersistenceService and you service):
1: MustCommit (check if you want the method Commit will be called) ,
2: if yes, he will call Commit method,
3: The complete method allow us to know the state of the process.

WCF Performance comparison article

Maxime LAMURE — Tue, 03 Apr 2007 11:43:26 GMT

Even if i find this article not completed ( no comparison with WSE 3.0, Java WS ...) , this article is a good overview about WCF performances with Microsoft technologies.

http://msdn2.microsoft.com/en-us/library/bb310550.aspx

How to: Callback function with WCF

Maxime LAMURE — Mon, 19 Mar 2007 21:29:00 GMT

The goal is to inform the client that the server process has progressed:

Situation: You have to update a lot of data on the server. You can use a web Service which will update your database. Each time a field is updated, the server can inform the client with the callback function.

Code on the Server side:

Add an interface :

public interface IProgress
{
[OperationContract(IsOneWay = true)]
void Update(int value);
}

Call the methode when you want to inform the client:

public boolean TransferMoney(int[] values)
{
IProgress iProgress = OperationContext.Current.GetCallbackChannel<IProgress>();
int val;
foreach (val in values)
{
iProgress.Update(val);
UpdateData(val); //Update the database
}
return true;
}

And change your Service Contract:

[ServiceContract(CallbackContract=typeof(IProgress), SessionMode=SessionMode.Required)]

Code on the Client side:

Create the class which implements the Interface and add the method which will be called by the server

class Handler : IBankingServiceCallback
{
public void Update(int value)
{
Console.WriteLine(“DataBase updated with: ”+value);
}
}

Change the call of the proxy with the InstanceContext in Parameter:

MyProxy proxy = new MyProxy (new InstanceContext(new Handler()));

Entreprise Library 3.0 January 2007 CTP

Maxime LAMURE — Mon, 22 Jan 2007 15:32:00 GMT

The January 2007 CTP of the Entreprise Library 3.0 has just been release. You can download it here

My Installation Guidance of the Web Client Software Factory on Windows Vista

Maxime LAMURE — Sun, 21 Jan 2007 23:07:36 GMT

My Installation Guidance of the Web Client Software Factory on Windows Vista

The Web Client Software Factory brings you installation documentation. However, when I decided to install it on Vista, I noticed some difference/ problems. So this version is the merger between the official documentation and my experience. I post here only the installation section. You can find the whole installation guidance with this link: (the content of the environment configuration section is the same plus some screenshots)

Installation

I: Guidance automation

Install:

Extension: http://www.microsoft.com/downloads/details.aspx?FamilyId=C0A394C0-5EEB-47C4-9F7B-71E51866A7ED&displaylang=en

Toolkit: http://www.microsoft.com/downloads/details.aspx?FamilyId=E3D101DB-6EE1-4EC5-884E-97B27E49EAAE&displaylang=en

WatchOut:

1. You may have error with the toolkit setup. Use a command.bat with “msiexec /I path.msi” inside and run it with administrator mode.
2. Close all VS instance for Extension and Toolit setup (devenv.exe process)

Reminder:

Guidance Automation Extensions allow to run a guidance package
Guidance Automation toolkit allow you to create / modify a package (need the library)

II: Install .NET 3.0 and Windows Workflow

Framework 3.0: http://www.microsoft.com/downloads/details.aspx?familyid=10CC340B-F857-4A14-83F5-25634C3BF043&displaylang=en

WorkFlow:
http://www.microsoft.com/downloads/details.aspx?familyid=5C080096-F3A0-4CE4-8830-1489D0215877&displaylang=en

III: Enterprise Library 2.0

Install:

Entreprise Library: http://www.microsoft.com/downloads/details.aspx?FamilyId=5A14E870-406B-4F2A-B723-97BA84AE80B5&displaylang=en

Copy these dlls in SourceCode\Microsoft.Practices\EnterpriseLibrary:

Microsoft.Practices.ObjectBuilder.dll
Microsoft.Practices.EnterpriseLibrary.Security.dll
Microsoft.Practices.EnterpriseLibrary.Logging.dll
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.Logging.dll
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.dll
Microsoft.Practices.EnterpriseLibrary.Data.dll
Microsoft.Practices.EnterpriseLibrary.Common.dll

IV: The Web Client Package

Install:

Le package "Web Client Development":
http://www.codeplex.com/websf/Wiki/View.aspx?title=Using%20the%20Web%20Client%20Software%20Development%20Package

Watch out:

Install this package in C:\ folder otherwise, you will have some problem about length of directory’s name

ClickOnce & WCF

Maxime LAMURE — Thu, 21 Sep 2006 11:49:00 GMT

A good feedback from Matias Woloski about Click Once and WCF :

http://staff.southworks.net/blogs/matiaswoloski/archive/2006/04/06/ClickonceWCF.aspx