public IAnimate <TSource> Begin()
{
mCurrentAnim = new AnimObject();
mCurrentAnim.Source = mSource;
mCurrentAnim.EasingMethod = new LinearEasing();
return(this);
}
private void HandleAnimation(object state)
{
List <AnimObject> animations = (List <AnimObject>)state;
while (animations.Count > 0)
{
for (int i = 0; i < animations.Count; i++)
{
AnimObject item = animations[i];
if (item.Watch == null)
{
item.Watch = new Stopwatch();
item.Watch.Start();
}
float alpha = item.Watch.ElapsedMilliseconds / (float)item.Duration;
if (alpha > 1.0f)
{
alpha = 1.0f;
}
TryMakeInterpolation(item, alpha);
if (alpha >= 1.0f && item.Loop != -1)
{
if (item.Loop == 0)
{
animations.RemoveAt(i);
continue;
}
item.Loop--;
item.Watch.Restart();
item.Watch.Start();
}
}
}
}
public IAnimate <TSource> End()
{
if (mCurrentAnim == null)
{
throw new NullReferenceException("Cannot End Animate, do you call Begin() before End() ?");
}
mAnimations.Add(mCurrentAnim);
mCurrentAnim = null;
return(this);
}
private void TryMakeInterpolation(AnimObject anim, float alpha)
{
alpha = anim.EasingMethod.Evaluate(alpha);
AnimVariant rawFromValue = new AnimVariant(anim.InitialValue);
AnimVariant rawToValue = new AnimVariant(anim.To.DynamicInvoke(anim.Source));
object value = null;
switch (rawFromValue.VariantType)
{
case AnimVariantType.Int:
value = Interpolate(rawFromValue.GetInt(), rawToValue.GetInt(), alpha);
break;
case AnimVariantType.Short:
value = Interpolate(rawFromValue.GetShort(), rawToValue.GetShort(), alpha);
break;
case AnimVariantType.Long:
value = Interpolate(rawFromValue.GetLong(), rawToValue.GetLong(), alpha);
break;
case AnimVariantType.Float:
value = Interpolate(rawFromValue.GetFloat(), rawToValue.GetFloat(), alpha);
break;
case AnimVariantType.Double:
value = Interpolate(rawFromValue.GetDouble(), rawToValue.GetDouble(), alpha);
break;
case AnimVariantType.Interpolator:
{
IInterpolator interpolator = rawFromValue.GetInterpolator();
interpolator.OnInterpolate(rawFromValue.Source, rawToValue.Source, alpha);
value = interpolator;
}
break;
default:
throw new InvalidOperationException("Cannot Interpolate a Unknow Type value");
}
anim.Listener?.DynamicInvoke(anim.Source, rawFromValue, rawToValue, alpha);
anim.FromSetter.DynamicInvoke(anim.Source, value);
}