this sources make more dinamic, to add points and add lines and joins.
its all wath i need givme the sources changue for i can conect and disconect nodes and add lines to the join nodes.
i need button for add point and line
i need botton for delete point and line
i need the points drag and droop like this example but i need if i clic in point make drag and drop or add join node
and return the all points X and Y positions and joins of the points X and Y