importClassesFrom(graph, graph)

importClassesFrom(methods, ANY, character, externalptr, integer, list,
                  logical, missing, numeric, vector)

importMethodsFrom(graph, edgeData, "edgeData<-",
                  edgeDataDefaults, "edgeDataDefaults<-", edgeL,
                  edgeMatrix, edgemode, edgeNames, nodeData,
                  "nodeData<-", nodeDataDefaults, "nodeDataDefaults<-",
                  nodes, numNodes)

importMethodsFrom(methods, show)

importMethodsFrom(stats4, plot)

importFrom(graph, edgeRenderInfo, "edgeRenderInfo<-", graph.par,
           graph.par.get, graphRenderInfo, "graphRenderInfo<-",
           nodeRenderInfo, "nodeRenderInfo<-", parRenderInfo,
           validGraph)

importFrom(graphics, arrows, lines, par, plot.new, plot.window,
           polygon, rect, strheight, strwidth, symbols, text,
           title)

import(grDevices)

importFrom(grid, bezierPoints, convertHeight, convertWidth,
           current.viewport, current.vpTree, popViewport, pushViewport,
           unit)

importFrom(methods, is, slot)

importFrom(utils, head, tail)

                                                                                
export(
        agopen,
        agopenSimple,
        agread,
        agwrite,
        buildEdgeList,
        buildNodeList,
        checkAttrs,
        drawAgNode,
        drawTxtLabel,
        getDefaultAttrs,
        getNodeLabels,
        getNodeNames,
        graphvizVersion,
        graphvizCapabilities,
        graphLayout,
        makeNodeAttrs,
        pieGlyph,
        removedEdges,
        toFile,
        layoutGraph
	)

exportClasses(
              "AgEdge",
              "AgNode",
              "AgTextLabel",
              "BezierCurve",
              "boundingBox",
              "pEdge",	# plot, related to buildEdgeList only
              "pNode",	# plot, related to buildNodeList only
              "Ragraph",
              "xyPoint"
	)

exportMethods(	
		graphDataDefaults,
		"graphDataDefaults<-", 
		graphData,
		"graphData<-", 
		clusterData,
		"clusterData<-", 
		nodeDataDefaults, 
		"nodeDataDefaults<-", 
		nodeData,
		"nodeData<-",
		edgeDataDefaults, 
		"edgeDataDefaults<-",
		edgeData, 
		"edgeData<-", 

		# Ragraph +
                "AgEdge<-",
                "AgEdge",
                "AgNode<-",
                "AgNode",
                "agraph",
                "arrowhead",
                "arrowsize",
                "arrowtail",
                "bezierPoints",
                "bLines",
                "botLeft",
                "boundBox",
                "color",
                "cPoints",
                "edgemode",
                "edgeNames",
                "ep",
                "fillcolor",
                "from",			# plot only
                "getNodeCenter",
                "getNodeHeight",
                "getNodeLW",
                "getNodeRW",
                "getNodeXY",
                "getNodeXY",
                "getPoints",
                "getSpline",
                "getX",
                "getY",
                "head",
                "labelColor",
                "labelFontsize",
                "labelJust",
                "labelLoc",
                "labelText",
                "labelWidth",
                "laidout",
                "layoutType",
                "lines",
                "name",			# plot
                "numSplines",
                "plot",			# graph only
                "pointList",
                "shape",
                "show",
                "sp",
                "splines",
                "style",
                "tail",
                "to",			# plot only
                "toDot",		# graph only
                "txtLabel",
                "upRight",
                "renderGraph"
	)
