import prefuse.action.assignment.StrokeAction; //导入依赖的package包/类
public static Visualization createTreeVisualization( HVContext context, String currentGroupId )
{
	updateTreeNodeRoles( context, currentGroupId );

	Tree hierarchyTree = context.getHierarchy().getTree();
	TreeLayoutData layoutData = context.getHierarchy().getTreeLayoutData();

	Visualization vis = new Visualization();

	if ( context.isHierarchyDataLoaded() ) {
		final float strokeWidth = 3;
		vis.add( HVConstants.HIERARCHY_DATA_NAME, hierarchyTree );

		NodeRenderer r = new NodeRenderer( layoutData.getNodeSize() );
		DefaultRendererFactory drf = new DefaultRendererFactory( r );
		EdgeRenderer edgeRenderer = new EdgeRenderer( prefuse.Constants.EDGE_TYPE_LINE );
		edgeRenderer.setDefaultLineWidth( strokeWidth );
		drf.setDefaultEdgeRenderer( edgeRenderer );
		vis.setRendererFactory( drf );

		NodeLinkTreeLayout treeLayout = new NodeLinkTreeLayout(
			HVConstants.HIERARCHY_DATA_NAME,
			layoutData.getTreeOrientation(),
			layoutData.getDepthSpace(),
			layoutData.getSiblingSpace(),
			layoutData.getSubtreeSpace()
		);
		treeLayout.setRootNodeOffset( 0 );
		treeLayout.setLayoutBounds(
			new Rectangle2D.Double(
				0, 0,
				layoutData.getLayoutWidth(), layoutData.getLayoutHeight()
			)
		);

		ColorAction edgesColor = new ColorAction(
			HVConstants.HIERARCHY_DATA_NAME + ".edges",
			VisualItem.STROKECOLOR,
			ColorLib.color( Color.lightGray )
		);

		ColorAction nodeBorderColor = new ColorAction(
			HVConstants.HIERARCHY_DATA_NAME + ".nodes",
			VisualItem.STROKECOLOR,
			ColorLib.color( Color.lightGray )
		);

		ColorAction nodeFillColor = new NodeColorAction(
			context,
			HVConstants.HIERARCHY_DATA_NAME + ".nodes",
			VisualItem.FILLCOLOR
		);

		StrokeAction nodeBorderStroke = new StrokeAction(
			HVConstants.HIERARCHY_DATA_NAME + ".nodes",
			StrokeLib.getStroke( strokeWidth )
		);

		ActionList designList = new ActionList();
		designList.add( edgesColor );
		designList.add( nodeBorderColor );
		designList.add( nodeFillColor );
		designList.add( nodeBorderStroke );

		ActionList layout = new ActionList();
		layout.add( treeLayout );
		layout.add( new RepaintAction() );

		vis.putAction( "design", designList );
		vis.putAction( "layout", layout );
		vis.putAction( "nodeColor", nodeFillColor );
		// TODO we can here implement a heuristic that will check if after enlarging
		// the border lines (rows and columns) of pixels do not contain other values
		// than background colour. If so, then we are expanding one again, otherwise
		// we have appropriate size of image
	}

	return vis;
}
 

import prefuse.action.assignment.StrokeAction; //导入依赖的package包/类
private void initialiseGraphView(Graph g, String label, int orientation, Dimension size) {
    setSize(size);
    m_vis = new Visualization();
    m_vis.addFocusGroup("selected");
    m_vis.addFocusGroup("highlighted");

    MultiScaleLabelRenderer tr = new MultiScaleLabelRenderer("value", label.contains("image") ? label : null);
    tr.setImagePosition(Constants.TOP);
    m_vis.setRendererFactory(new DefaultRendererFactory(tr));

    // adds graph to visualization and sets renderer label field
    setGraph(g);

    int hops = Integer.MAX_VALUE;
    final GraphDistanceFilter filter = new GraphDistanceFilter(graph, hops);

    FontAction font = new FontAction(nodes, UIHelper.VER_8_PLAIN);

    ColorAction fill = new ColorAction(nodes, VisualItem.FILLCOLOR, ColorLib.rgb(255, 255, 255));
    fill.add("ingroup('highlighted')", ColorLib.rgb(241, 242, 242));
    fill.add("ingroup('selected')", ColorLib.rgb(241, 242, 242));


    ColorAction stroke = new ColorAction(nodes, VisualItem.STROKECOLOR, backgroundColor);
    StrokeAction strokeWeight = new StrokeAction(nodes, StrokeLib.getStroke(3f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
    stroke.add("ingroup('highlighted')", ColorLib.rgb(224, 228, 204));
    stroke.add("ingroup('selected')", ColorLib.rgb(202, 106, 33));

    ActionList draw = new ActionList(500);
    draw.add(font);
    draw.add(filter);
    draw.add(fill);
    draw.add(stroke);
    draw.add(strokeWeight);
    draw.add(new ColorAction(nodes, VisualItem.TEXTCOLOR, ColorLib.rgb(109, 110, 113)));
    draw.add(new ColorAction(edges, VisualItem.FILLCOLOR, ColorLib.gray(200)));
    draw.add(new ColorAction(edges, VisualItem.STROKECOLOR, ColorLib.gray(200)));
    draw.add(new RepaintAction());

    ActionList animate = new ActionList();

    NodeLinkTreeLayout layout = new NodeLinkTreeLayout(graph);
    layout.setDepthSpacing(80);
    layout.setBreadthSpacing(70);
    layout.setOrientation(orientation);

    animate.add(new QualityControlAnimator());
    animate.add(new LocationAnimator(nodes));
    animate.add(layout);

    m_vis.putAction("draw", draw);
    m_vis.putAction("layout", animate);

    // set up a display to show the visualization
    display = new Display(m_vis);
    display.setSize(size);

    // main display controls
    display.addControlListener(new PanControl());
    display.addControlListener(new ZoomControl());
    display.addControlListener(new WheelZoomControl());
    display.addControlListener(new ZoomToFitControl());

    // now we run our action list
    m_vis.run("draw");
    m_vis.run("layout");

    add(display);
}