_get_view(self)
Called before a view is changed, such as during a pan or zoom initiated by the user. You may return any information you deem necessary to describe the view.
Intended to be overridden by new projection types, but if not, the default implementation saves the view limits. You must implement :None:meth:`_set_view` if you implement this method.
Save information required to reproduce the current view.
Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.
Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)
SVG is more flexible but power hungry; and does not scale well to 50 + nodes.
All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them