protected virtual void ClearValueCore(DependencyProperty dp)
{
if (_LocalValue.ContainsKey(dp))
{
object oldValue = _LocalValue[dp];
_LocalValue.Remove(dp);
if (oldValue != dp.DefaultMetadata.DefaultValue && dp.DefaultMetadata.PropertyChangedCallback != null)
{
DependencyPropertyChangedEventArgs e = new DependencyPropertyChangedEventArgs(dp, oldValue, dp.DefaultMetadata.DefaultValue);
dp.DefaultMetadata.PropertyChangedCallback(this, e);
}
}
}
protected virtual void SetValueCore(DependencyProperty dp, object value)
{
if (dp.ValidateValueCallback != null)
if (!dp.ValidateValueCallback(value))
throw new ArgumentException("Value invalid.");
if (dp.DefaultMetadata.CoerceValueCallback != null)
value = dp.DefaultMetadata.CoerceValueCallback(this, value);
object oldValue;
if (_LocalValue.ContainsKey(dp))
{
oldValue = _LocalValue[dp];
_LocalValue[dp] = value;
}
else
{
oldValue = dp.DefaultMetadata.DefaultValue;
_LocalValue.Add(dp, value);
}
if (dp.DefaultMetadata.PropertyChangedCallback != null)
{
DependencyPropertyChangedEventArgs e = new DependencyPropertyChangedEventArgs(dp, oldValue, value);
dp.DefaultMetadata.PropertyChangedCallback(this, e);
}
}
