Hi…
there is a link Navigation of Graphs . In which by changing value of radio Button focus shift to someOther part of Diagram.
How this is happening. Which class/component is responsible for shifting focus to one Part to Other Part of Object.
The code is all right there for you to examine.
It relly depends on what you mean by “focus”. You might want to read GoJS Highlighting -- Northwoods Software and GoJS Selection -- Northwoods Software about two separate mechanisms.