TODOs
==========
Functional
[ ] veto movements which cause overlaps
	- auto-translate on overlap locations.
	
[ ] add info text to bottom of gui
	- current state, possible actions
	- graph statistics
	
[ ] Build GraphModelGenerator's
	- Two types: generate graph or take arbitrary Graph as input and draw it
	
[ ] Implement graph model serialization
	- XML?  Why not.
	- extensible attributes
	[ ] load
	[ ] save
	
Code Cleanup
[/] clean up VertexShape, EdgeShape hierarchy.
	- implements GraphShape
	- Edge baseclass
	
	- Vertices and edges point to each other (PERF)


Design Notes
==========

Graph View Design
----------

Support these actions (* required, + soon, - later):

* Click to add vertex
	 o auto number

* Click to add edge

- Save graph
- Load graph

Requirements
* Real-time feedback
* Upon action completion:
	o notify model
	o refresh view
	

Graph Controller
----------

States:
1. Ready
2. Vertex move (1->mouse down)
3. Vertex create (1->click)
4. Edge create (1->mod-mouse down)
5. Vertex select (1->click)
6. Edge select (1->click)

Graph Model
----------

o Contains non-transient graph and drawing state.
	o Objects and locations

API

hitDetect(coord) -> {Edge, Vertex, null)
addVertex(coord) -> boolean success
removeVertex(Vertex) -> success
addEdge(Vertex, Vertex)
removeEdge(Edge) -> success
moveVertex(Vertex) -> success
getShapes() -> iterator

DATA STRUCTURES

Edges
- List of edges {VS_a, VS_b, Line2D}



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