invokes the updateInfoBoxMenuItem functions of the GraphExplorerCanvas the gui is in in oder to enable or disable the gui main menu item "show/Hide Infobox"
The fisheye factor has influence on whether to decrease the ring offset from the inner to the outer, or not.
0 means no fisheye effect, 100 causes a strong fisheye effect. this function can be used by a slider in the gui.
A special object that stores temporary elements during the calculation of node sizes in the NodeWeightCalculator: for every node, such a SizeListEntry is instantiated, holding all its direct tree children, the id, and the sum of its own weight and the sum of all its children in the tree.
This wizard panel actually is the starting point of the parsing process: it initiales the Parsing
Manager accoring to the user input (tag definitions and file location).