CompositionAnimation.SetExpressionReferenceParameter 方法
定义
重要
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设置一个对象，该对象实现 IAnimationObject 作为 ExpressionAnimation 中的引用参数。
public:
virtual void SetExpressionReferenceParameter(Platform::String ^ parameterName, IAnimationObject ^ source) = SetExpressionReferenceParameter;void SetExpressionReferenceParameter(winrt::hstring const& parameterName, IAnimationObject const& source);public void SetExpressionReferenceParameter(string parameterName, IAnimationObject source);function setExpressionReferenceParameter(parameterName, source)Public Sub SetExpressionReferenceParameter (parameterName As String, source As IAnimationObject)参数
- parameterName
-
String
Platform::String
winrt::hstring
要设置的参数的名称。
- source
- IAnimationObject
源对象。
示例
// CustomObject that implements IAnimationObject.
class CustomObject : IAnimationObject
{
public CustomObject(Compositor compositor)
{
_targetVisual = compositor.CreateSpriteVisual();
}
// Implement PopulatePropertyInfo method that
// redirects the property named "CustomOffset"
// to the Offset property of the underlying visual.
void IAnimationObject.PopulatePropertyInfo(
string propertyName,
AnimationPropertyInfo propertyInfo)
{
if (propertyName.Equals(“CustomOffset”)
{
_targetVisual.PopulatePropertyInfo(
“Offset”,
propertyInfo);
}
}
private SpriteVisual _targetVisual = null;
}
// Sample usage of CustomObject in an ExpressionAnimation.
void SetupExpression(
Compositor compositor,
IAnimationObject customObject,
SpriteVisual target)
{
var expAnim = compositor.CreateExpressionAnimation(
“customObject.CustomOffset + vector3(100.0f, 0.0f, 0.0f)”);
expAnim.SetExpressionReferenceParameter(“customObject”, customObject);
targetVisual.StartAnimation(“Offset”, expAnim);
}