15 #ifndef QGSLINEVECTORLAYERDIRECTORH    16 #define QGSLINEVECTORLAYERDIRECTORH    49                                 const QString& directDirectionValue,
    50                                 const QString& reverseDirectionValue,
    51                                 const QString& bothDirectionValue,
    70     int mDirectionFieldId;
    79     int mDefaultDirection;
    82 #endif //QGSLINEVECTORLAYERGRAPHDIRECTORH 
Determine interface for creating a graph. 
 
Determine making the graph from vector line layer. 
 
virtual QString name() const =0
return Director name 
 
virtual void makeGraph(QgsGraphBuilderInterface *builder, const QVector< QgsPoint > &additionalPoints, QVector< QgsPoint > &tiedPoints) const
Make a graph using RgGraphBuilder. 
 
Represents a vector layer which manages a vector based data sets. 
 
Determine making the graph.