Canvas · Graphs and boards: node graph, flow chart, mind map, whiteboard

NodeGraph joins Nodes by wires between typed Ports: a title drags a
node, a drag out of an output lands on an input of the same kind, an
input takes one wire, and a press on a wired input lifts its wire.
Links join shapes on the plane and follow them, straight or at right
angles, with an arrow and words; the Connector tool draws them and the
Note tool drops a sticky note. A double press with Select writes on a
shape. FlowChart draws Steps as ellipses, boxes and diamonds with their
words. MindMap lays topics out from a root, half to each side, and asks
the owner to add, remove and rename by key. Whiteboard keeps its own
tool, view and selection over a board it hands back after each change.
Painting moves to canvas::paint; a press on the tool layer goes through
canvas::press, and the layer focuses itself and asks to delete.

tasks/ch31-43.md

@@ -71,13 +71,13 @@
 
 ## T32d Canvas · Graphs and boards
 
-- [ ] NodeEditor / NodeGraph
-- [ ] Node / Port / Edge / Connection
-- [ ] FlowChart / DiagramEditor
-- [ ] MindMap
-- [ ] Whiteboard
-- [ ] StickyNote
-- [ ] Connector Line
+- [x] NodeEditor / NodeGraph
+- [x] Node / Port / Edge / Connection
+- [x] FlowChart / DiagramEditor
+- [x] MindMap
+- [x] Whiteboard
+- [x] StickyNote
+- [x] Connector Line
 
 ## T33 DB & Dev Tools — `src/devtools`