Here are the classes, structs, unions and interfaces with brief descriptions:

CanvasPanel	This class represents the canvas on which the graph is drawn
DrawPanel	This class represents the control panel which contains all control elements of the GUI
Edge	This class represents an Edge of the graph or the control mesh
GridCell	This class represents a cell in the regular grid that is used in the automatic creation of the control mesh
GridRegion	This class represents a region in which the Edges of the graph have a similar direction
MainWindow	This class initializes the application and also contains the container for all the GUI elements
MouseMode	This enumerator represents the current mode of the mouse cursor to determine the actions to take when clicking inside the canvas
Node	This class represents a Node of the graph or control mesh