GraphZoomScrollPane 和 VisualizationViewer 依赖项

Question

我对我的 GraphZoomScrollPane 工作非常奇怪的情况感到震惊，在一些放大和缩小操作后滚动条突然消失。它们确实出来了，但尺寸不合适而且没有 Y？任何人都可以在这方面帮助我并让我知道缩放取决于哪些参数吗？我正在使用 JUNG PopupGraphMousePlugin、ModalGraphMouse、DefaultSettableVertexLocationFunction、EdgeWeightStrokeFunction。 非常感谢任何类型的文档或帮助。

Answer 1

private JPanel _getCenterPanel() {
        JPanel jpMainPanel = new com.panduit.acmnms.gui.framework.ACMPanel(new GridLayout(1,0));
        initVisualViewer();
        pane = new GraphZoomScrollPane(vv);//Defined in the begng.
        jpMainPanel.add(pane);
        return jpMainPanel;
    }

private void initVisualViewer() {
        clusteringLayout = new SubLayoutDecorator(new SpringLayout(graph));
        Dimension preferredSize = new Dimension(width, height);
        visualizationModel = new DefaultVisualizationModel(clusteringLayout, preferredSize);
        vv =  new VisualizationViewer(visualizationModel, pr, preferredSize);
        ewcs = new EdgeWeightStrokeFunction(edge_weight);
        vertexLocations = new DefaultSettableVertexLocationFunction(); 
        vv.setDoubleBuffered(false);
        vv.setGraphMouse(graphMouse);
        graphMouse.setMode(ModalGraphMouse.Mode.PICKING);
        popupGraphMousePlugin = new PopupGraphMousePlugin(vertexLocations);
        graphMouse.add(popupGraphMousePlugin);
        System.out.println("  graphMouse.getModeMenu()  "+graphMouse.getModeMenu());
        graphMouse.setZoomAtMouse(true);
        vv.setGraphMouse(graphMouse);
        vertexImagerAndShapeFunction = new VertexIconAndShapeFunction(new EllipseVertexShapeFunction());
        vertexImagerAndShapeFunction.setIconMap(iconMap);
        pr.setVertexIconFunction(vertexImagerAndShapeFunction);
        pr.setVertexShapeFunction(vertexImagerAndShapeFunction);
        vertexStringerImpl = new VertexStringerImpl(labelMap);
        pr.setVertexStringer(vertexStringerImpl);
        vertexToolTipFunctionAdapter = new VertexToolTipFunctionAdapter(tooTipMap);
        vv.setToolTipFunction(vertexToolTipFunctionAdapter);
        vv.setPickSupport(new ShapePickSupport());
            pr.setEdgeShapeFunction(new EdgeShape.QuadCurve());
        ewcs.setWeighted(true);
        vv.setBackground(Color.white);
    }

上面是负责缩放部分代码的部分代码。
请让我知道。到底哪里错了。