private void InsertIntervalRelativeTo(Interval toInsert, Interval relativeTo, string where)
{
if (relativeTo == null)
{
intervals.Add(toInsert);
}
else
{
var index = Intervals.IndexOf(relativeTo);
if ("after".Equals(where))
{
if (index != -1)
{
intervals.Insert(++index, toInsert);
}
else
{
intervals.Add(toInsert);
}
}
if ("before".Equals(where))
{
Intervals.Insert(index, toInsert);
}
}
FirePropertyChanged("HasIntervals");
RefreshTemplate();
}