Hi ,
I have a seperate view,viewmodel ,model classes, I want to implement goxam funtionality on it using MVVM Model . All the code should move to viewmodel class .
Yes, you can do that. The samples in the demo app were organized so as to keep the code relatively simple, rather than strictly following the MVVM philosophy.
However, you could consider the DiagramModel as being a viewmodel.
And some of the samples do make explicit use of classes that are viewmodels, especially where it made data-binding more convenient.