Modeling and Optimization of Traffic Flow in Urban Areas - Czech ...

4.2 Tool Architecture and Basic Notation 43Fig. 4.4: Graphedit (main window, library browser, property editor)The toolbox is equipped with a simple but powerful editor of graphs calledGraphedit based on the System Handle Graphics of Matlab. It allows one toconstruct directed graphs with various user parameters on nodes and edges bysimple and an intuitive way. Fig. 4.4 shows the Graphedit with a graph withvarious graphical representations of nodes, various edge paths and two settingwindows: property editor and node library. The constructed graph can beeasily used to create an instance of the class Graph which can be exported tothe Matlab workspace or saved to a binary mat-file. In addition, Grapheditcontains a system of plug-ins which allow one to extend its functionality bythe user.Moreover, due to the close relationship between the scheduling and graphalgorithms, each object Graph can be transformed to an object Taskset andvice versa. Obviously, the nodes from the graph are transformed to the tasksin the Taskset and the edges are transformed to the precedence constraintsand vice versa according to the user specification.