Image_Graph_Common | --Image_Graph_Element | --Image_Graph_Plotarea_Element | --Image_Graph_Layout | --Image_Graph_Legend
A legend can be displayed in two ways:
Image_Graph_Legend Image_Graph_Legend( )
void setAlignment( int $alignment)
void setPlotarea( Image_Graph_Plotarea &$plotarea)
void setShowMarker( bool $showMarker)