如何在JUNG中获得顶点坐标？

问题描述

| 在Jung中使用EditingModalGraphMouse时，有没有一种方法可以获取顶点坐标？我已经使用坐标设置器和吸气剂为顶点创建了一个类，但是我不知道如何使用其特定坐标设置顶点？（我有一个变压器：变压器）

解决方法

以下内容为您提供了有关如何在Jung VisualizationViewer实例上获取笛卡尔坐标的想法... 创建一个内部类，如下所示：

protected class MyGraphMousePlugin extends TranslatingGraphMousePlugin implements MouseListener {

    @Override
    public void mouseMoved(MouseEvent e) {
        final VisualizationViewer<GeoLocationData.Station,GeoLocationData.Link> vv =
        (VisualizationViewer<GeoLocationData.Station,GeoLocationData.Link>)e.getSource();
        Point2D p = e.getPoint();//vv.getRenderContext().getBasicTransformer().inverseViewTransform(e.getPoint());
        GraphElementAccessor<GeoLocationData.Station,GeoLocationData.Link> pickSupport = vv.getPickSupport();
        if(pickSupport != null) {               
            vv.setToolTipText (\"<html>x: \"+p.getX()+\"<br>y: \"+p.getY());
        }
    }

    public MyGraphMousePlugin(int modifiers) {
        super(modifiers);
        // TODO Auto-generated constructor stub
    }

    public MyGraphMousePlugin() {
        super();
    }
}

将插件添加到您的GraphMouse实例：

graphMouse = new DefaultModalGraphMouse<Object,Object>();
vv.setGraphMouse(graphMouse);
vv.addKeyListener(graphMouse.getModeKeyListener());
graphMouse.add(new MyGraphMousePlugin());

编辑：接下来的修改将为您提供笛卡尔坐标，其中考虑了在Jung图布局上进行的平移：

protected class MyGraphMousePlugin extends TranslatingGraphMousePlugin implements MouseListener {

    @Override
    public void mouseMoved(final MouseEvent e) {

        SwingUtilities.invokeLater(
                new Runnable() {
                    public void run() {
                        final VisualizationViewer<GeoLocationData.Station,GeoLocationData.Link> vv =
                            (VisualizationViewer<GeoLocationData.Station,GeoLocationData.Link>)e.getSource();
                        Point2D p = e.getPoint();//vv.getRenderContext().getBasicTransformer().inverseViewTransform(e.getPoint());
                        GraphElementAccessor<GeoLocationData.Station,GeoLocationData.Link> pickSupport = vv.getPickSupport();
                        if(pickSupport != null) {

                            AffineTransform lat =
                                vv.getRenderContext().getMultiLayerTransformer().getTransformer(Layer.LAYOUT).getTransform();
                            //AffineTransform vat =
                            //  vv.getRenderContext().getMultiLayerTransformer().getTransformer(Layer.VIEW).getTransform();
                            //AffineTransform at = new AffineTransform();

                            double x = p.getX() - lat.getTranslateX(); //;
                            double y = p.getY() - lat.getTranslateY(); //;

                            vv.setToolTipText (\"<html>x: \"+x+\"<br>y: \"+y);
                        }

                    }
                }
        );
    }

    public MyGraphMousePlugin(int modifiers) {
        super(modifiers);
        // TODO Auto-generated constructor stub
    }

    public MyGraphMousePlugin() {
        super();
    }
}

由于它省略了比例因子，因此它仍然不是完美的，但是您会明白的。您需要计算从屏幕坐标系到视图坐标系再到模型坐标系，以获得模型的坐标。上面代码中的泛型类型应更改为您自己的版本：）已编辑哈哈，线索已经存在，这是正确的方法...无需计算！ http://sourceforge.net/projects/jung/forums/forum/252062/topic/3040266?message=6522779

    @Override
    public void mouseMoved(final MouseEvent e) {

        SwingUtilities.invokeLater(
                new Runnable() {
                    public void run() {
                        final VisualizationViewer<GeoLocationData.Station,GeoLocationData.Link>)e.getSource();
                        Point2D p = vv.getRenderContext().getMultiLayerTransformer().inverseTransform(e.getPoint());

                        double x = p.getX();
                        double y = p.getY();

                        vv.setToolTipText (\"<html>x: \"+(int)x+\"<br>y: \"+(int)y);
                    }
                }
        );
    }

何在坐标坐标获得顶点