/// <summary>
/// Performs actions after attribute changed to validate events and intervals</summary>
/// <param name="sender">Sender</param>
/// <param name="e">AttributeEventArgs containing event data</param>
protected override void OnAttributeChanged(object sender, AttributeEventArgs e)
{
BaseEvent _event = e.DomNode.As <BaseEvent>();
if (_event != null)
{
if (e.AttributeInfo.Equivalent(Schema.eventType.startAttribute))
{
float value = (float)e.NewValue;
float constrained = Math.Max(value, 0); // >= 0
constrained = (float)MathUtil.Snap(constrained, 1.0); // snapped to nearest integral frame number
if (constrained != value)
{
throw new InvalidTransactionException("Timeline events must have a positive integer start time".Localize());
}
return;
}
Interval interval = _event.As <Interval>();
if (interval != null)
{
if (e.AttributeInfo.Equivalent(Schema.intervalType.lengthAttribute))
{
float value = (float)e.NewValue;
float constrained = Math.Max(value, 1); // >= 1
constrained = (float)MathUtil.Snap(constrained, 1.0); // snapped to nearest integral frame number
if (constrained != value)
{
throw new InvalidTransactionException("Timeline intervals must have an integer length".Localize());
}
return;
}
}
}
}
