在JUNG中更改顶点的大小/颜色

问题描述

如何更改Jung Visualization Library中特定顶点的大小？

我正在阅读文档，但对java并不是非常熟悉，我也找不到任何好的示例。

我花了一段时间，但这里有一个可读的完全注释的程序，它改变了图形中的顶点大小和颜色。享受！

  public class SimpleGraphView {
 public SimpleGraphView（）{
 //用Integer创建一个图顶点和字符串边缘
 Graph< Integer，String> g = new SparseGraph< Integer，String>（）; 
 for（int i = 0; i  g.addEdge（Edge，1，2）; 
 g.addEdge（Another Edge，1，4）; 
 
 //布局实现图形绘制逻辑
布局<整数，字符串> layout = new CircleLayout< Integer，String>（g）; 
 layout.setSize（new Dimension（300,300））; 
 
 // VisualizationServer实际显示图
 BasicVisualizationServer< Integer，String> vv = new BasicVisualizationServer< Integer，String>（layout）; 
 vv.setPreferredSize（new Dimension（350,350））; //设置查看区域大小
 
 // Transformer将顶点数映射到顶点属性
 Transformer< Integer，Paint> vertexColor = new Transformer< Integer，Paint>（）{
 public Paint transform（Integer i）{$ b $ if（i == 1）return Color.GREEN; 
返回Color.RED; 
} 
}; 
 Transformer< Integer，Shape> vertexSize = new Transformer< Integer，Shape>（）{
 public Shape transform（Integer i）{
 Ellipse2D circle = new Ellipse2D.Double（-15，-15，30，30）; 
 //在这种情况下，顶点是两倍大
 if（i == 2）返回AffineTransform.getScaleInstance（2，2）.createTransformedShape（circle）; 
 else返回圆; 
} 
}; 
 vv.getRenderContext（）。setVertexFillPaintTransformer（vertexColor）; 
 vv.getRenderContext（）。setVertexShapeTransformer（vertexSize）; 
 
 JFrame frame = new JFrame（Simple Graph View）; 
 frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）; 
 frame.getContentPane（）。add（vv）; 
 frame.pack（）; 
 frame.setVisible（true）; 
 
 
 public static void main（String [] args）{
 SimpleGraphView（）; 
} 
} 
  

How do you change the size of a specific vertex in Jung Visualization Library?

I'm reading the documentation but I'm not extremely familiar with java and I can't find any good examples on line.

解决方案

It took me a while, but here is a readable, fully-commented program that changes the vertex size and color in a graph. Enjoy!

public class SimpleGraphView {
    public SimpleGraphView() {
        // Create a graph with Integer vertices and String edges
        Graph<Integer, String> g = new SparseGraph<Integer, String>();
        for(int i = 0; i < 5; i++) g.addVertex(i);
        g.addEdge("Edge", 1, 2);
        g.addEdge("Another Edge", 1, 4);

        // Layout implements the graph drawing logic
        Layout<Integer, String> layout = new CircleLayout<Integer, String>(g);
        layout.setSize(new Dimension(300,300));

        // VisualizationServer actually displays the graph
        BasicVisualizationServer<Integer,String> vv = new BasicVisualizationServer<Integer,String>(layout);
        vv.setPreferredSize(new Dimension(350,350)); //Sets the viewing area size

        // Transformer maps the vertex number to a vertex property
        Transformer<Integer,Paint> vertexColor = new Transformer<Integer,Paint>() {
            public Paint transform(Integer i) {
                if(i == 1) return Color.GREEN;
                return Color.RED;
            }
        };
        Transformer<Integer,Shape> vertexSize = new Transformer<Integer,Shape>(){
            public Shape transform(Integer i){
                Ellipse2D circle = new Ellipse2D.Double(-15, -15, 30, 30);
                // in this case, the vertex is twice as large
                if(i == 2) return AffineTransform.getScaleInstance(2, 2).createTransformedShape(circle);
                else return circle;
            }
        };
        vv.getRenderContext().setVertexFillPaintTransformer(vertexColor);
        vv.getRenderContext().setVertexShapeTransformer(vertexSize);

        JFrame frame = new JFrame("Simple Graph View");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().add(vv);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        new SimpleGraphView();
    }
}

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