public IAnimatableProperty <T> AsAnimatable()
{
// Try to get existing animatable.
IGamePropertyData untypedData = Owner.PropertyData.Get(_metadata.Id);
AnimatableGamePropertyData <T> animatableData = untypedData as AnimatableGamePropertyData <T>;
if (animatableData != null)
{
return(animatableData);
}
// Create new animatable data.
animatableData = new AnimatableGamePropertyData <T>(_owner, _metadata, untypedData as GamePropertyData <T>);
Owner.PropertyData.Set(_metadata.Id, animatableData);
return(animatableData);
}
//--------------------------------------------------------------
#region Methods
//--------------------------------------------------------------
private GamePropertyData <T> GetOrCreateLocalData()
{
IGamePropertyData untypedData = Owner.PropertyData.Get(_metadata.Id);
GamePropertyData <T> data;
if (untypedData != null)
{
// data found!
data = (GamePropertyData <T>)untypedData;
}
else
{
// No data found! Create new data.
data = new GamePropertyData <T>();
Owner.PropertyData.Set(_metadata.Id, data);
}
return(data);
}
/// <inheritdoc/>
public void Reset()
{
// Get local data.
IGamePropertyData untypedData = Owner.PropertyData.Get(_metadata.Id);
// Nothing to do if we have no local data.
if (untypedData == null)
{
return;
}
// Nothing to do if the local data uses the default value.
if (!untypedData.HasLocalValue)
{
return;
}
// Assert: We have a local value and must remove it.
var data = ((GamePropertyData <T>)untypedData);
// If the value is animated, changing the BaseValue does not cause events.
var animatableData = untypedData as AnimatableGamePropertyData <T>;
// Remember current value.
T oldValue;
bool isAnimated;
if (animatableData != null)
{
oldValue = animatableData.BaseValue;
isAnimated = animatableData.IsAnimated;
}
else
{
oldValue = data.Value;
isAnimated = false;
}
// Get the target default value from template or metadata.
T defaultValue;
if (Owner.Template != null)
{
defaultValue = new GameProperty <T>(Owner.Template, _metadata).Value;
}
else
{
defaultValue = _metadata.DefaultValue;
}
if (isAnimated || EqualityComparer <T> .Default.Equals(oldValue, defaultValue))
{
// oldValue and defaultValue are the same. We only have to reset the flag.
data.HasLocalValue = false;
data.Value = default(T);
return;
}
var newValue = defaultValue;
// Raise Changing event.
data.OnChanging(this, oldValue, ref newValue);
if (EqualityComparer <T> .Default.Equals(defaultValue, newValue))
{
// After coercion in Changing, the target value is still the default value.
// Value has been reset.
data.HasLocalValue = false;
data.Value = default(T);
// Raise Changed event if oldValue is different from the newValue.
if (!EqualityComparer <T> .Default.Equals(oldValue, defaultValue))
{
data.OnChanged(this, oldValue, defaultValue);
}
}
else
{
// Value was overwritten by Changing event handler! - We still have a local value!
// Raise Changed event if oldValue is different from the newValue.
if (!EqualityComparer <T> .Default.Equals(oldValue, newValue))
{
data.Value = newValue;
data.OnChanged(this, oldValue, newValue);
}
}
}
