protected override bool SetProperty <T>(ref T fieldValue, T newValue, [CallerMemberName] string propertyName = null)
{
if ((fieldValue as FlowDocument) != null && (newValue as FlowDocument) != null)
{
TextRange oldDoc = new TextRange((fieldValue as FlowDocument).ContentStart, (fieldValue as FlowDocument).ContentEnd);
TextRange newDoc = new TextRange((newValue as FlowDocument).ContentStart, (newValue as FlowDocument).ContentEnd);
if (oldDoc.GetHashCode() == newDoc.GetHashCode())
{
return(false);
}
}
else if (EqualityComparer <T> .Default.Equals(fieldValue, newValue))
{
return(false);
}
// change tracking support
if (TrackChanges == true)
{
StoreInitialValue(fieldValue, propertyName);
// updatedDateTime support
StoreInitialValue(_updatedDateTime, nameof(UpdatedDateTime));
// update updatedDateTime when every other property change
if (propertyName != "UpdatedDateTime")
{
_updatedDateTime = DateTime.Now;
}
RaisePropertyChanged(nameof(UpdatedDateTime));
}
fieldValue = newValue;
RaisePropertyChanged(propertyName);
return(true);
}
