Image_Graph_Common | --Image_Graph_Element | --Image_Graph_Plotarea_Element | --Image_Graph_Marker | --Image_Graph_Marker_Value
Image_Graph_Marker_Value Image_Graph_Marker_Value( [int $useValue = IMAGE_GRAPH_VALUE_X])
void setBackground( Image_Graph_Fill &$background)
void setBackgroundColor( mixed $color)
Image_Graph_DataPreprocessor &setDataPreprocessor( DataPreprocessor &$dataPreprocessor)