/// <summary>
/// 插入一个表达式帧，并提交上一帧。
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
public KeyFrameTransitionAnimationFluentContext <T> ExpressionKeyFrame(String expression)
{
InsertActiveKeyFrame();
CurrentKeyFrameContext = new ExpressionKeyFrameFluentContext {
Value = expression
};
return(this);
}
/// <summary>
/// 插入一个关键帧，并提交上一帧。
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public KeyFrameTransitionAnimationFluentContext <T> KeyFrame(T value)
{
InsertActiveKeyFrame();
CurrentKeyFrameContext = new KeyFrameFluentContext <T> {
Value = value
};
return(this);
}
private void InsertActiveKeyFrame()
{
var activeKeyFrame = CurrentKeyFrameContext;
if (activeKeyFrame == null)
{
return;
}
KeyFrameContexts.Add(activeKeyFrame);
CurrentKeyFrameContext = null;
}
/// <summary>
/// 通过表达式指定动画结束的值
///
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
public EasyTransitionAnimationFluentContext <T> ToExpression(String expression)
{
if (ToKeyFrameContext != null)
{
throw new InvalidOperationException("To 已经被指定。");
}
ToKeyFrameContext = new ExpressionKeyFrameFluentContext()
{
Value = expression,
Progress = 1
};
return(this);
}
/// <summary>
/// 指定动画结束的值。
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public EasyTransitionAnimationFluentContext <T> To(T value)
{
if (ToKeyFrameContext != null)
{
throw new InvalidOperationException("To 已经被指定。");
}
ToKeyFrameContext = new KeyFrameFluentContext <T>
{
Value = value,
Progress = 1
};
return(this);
}
