ofxSheet

openFrameworks addon to handle blank design areas to put your components.

what it does: https://youtu.be/WwU1c3z3A5c

This is far from a complete example. It't just to give some starting ideias, when managing graph itens.

some help:

r : delete (item or edge) with the mouse on the item or the box in the middle of the edge

n : create item

upkey: move screen up

downkey: move screen down

+: doubles zoon

-: halfs zoom

right click on item : change color

middle click and hold on item: move item

middle click on worspace: move workspace

right click on item and release on another : create edge (Relation)

double click on workspace : reset zoom