The mysteries of extending the WPF animation classes -

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There is a property on the Silverlight's animation timetable (like Double Animation) which is called simplification that allows you to specify a function Allows two values ​​with which Although it is coming in .NET 4, I want to shut it down from 3.5 After reading, it feels great, but I am having a strange problem.

I am expanding double animation like this: 

  class EasingDoubleAnimation: DoubleAnimation {protected override Freezable CreateInstanceCore () {Return New EasingDoubleAnimation (); } Secure Override Double GateCurrentValuere (Double Default Origin Value, Double Default Destination Value, AnimationClock AnimationClock) {debug.rooteline (animationclock.content.product.vill); Return base GetCurrentValueCore (defaultOriginValue, defaultDestinationValue, animationclock); } Public Relativity FunctionBase Easing {Receiving (EasingFunctionBase) GetValue (EasingFunctionProperty);} Set {SetValue (EasingFunctionProperty, value);} Dependency reinforcement for public static reading functioning = Dependency Property. Registrar ("Easy", Typef (Ease work), typef (simplicity doubling), new property matadata (null));}

Note that this is nothing interesting than adding a new asset.

And then I Some code can be used in: 

  Storyboard SB = new storyboard (); EasingDoubleAnimation ease = new EasingDoubleAnimation (); // reduce.existingfunction = new backage (); storyboards. Ease, My Target); Storyboard CertificateProperties (Easy, New Property Path ("(Canvas. Left)"); For ease = 100; Rest. Duration = Timespace. Formsconds (3); Sb.Children.Add Ease); sb.Begin ();

This code runs animation properly.

But, if I do the assignment to the line which works smoothly, the animation does not run anymore. My CreateInstanceCore method is called, but GetCurrentValue is never asked. strange?

Just take a shot here in the dark. Try changing the type of property into a simple type ( int / string ) I suspect that there may be something like this with the fact that your property type EasingFunctionBase and you are trying to stabilize this example.


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