Basically I want to get the RotationAngle property changed in GoXamModel.Changed event. I have a custom event attached to it but to this event I have put a filter something like this
This works perfectly. But for rotate I have to bind undo-redo and also for serialization I have to notify the next layer in my architecture via ModelChanged event alone.
That is right but as I mentioned initially we have the filter that blocks if the e.OldValue is null and For RotationAngle property changed the OldValue was coming as null and I wanted to know the reason for it.
Actually I found the reason and its because in the Node shape template the Data.RotationAngle property was not binded in the xaml. After binding I started getting the values in the oldValue