实际上，如何使用GraphStream在摆动中绘制图形？

Question

我试图在swing中实现教学图的绘制，但是失败了。

代码如下：

包测试.graphstream；

import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import org.graphstream.graph.Graph;
import org.graphstream.graph.implementations.SingleGraph;
import org.graphstream.ui.swingViewer.View;
import org.graphstream.ui.swingViewer.Viewer;

public class Tutorial1_01
{
    private static Graph graph = new SingleGraph("Tutorial 1");

    public static class MyFrame extends JFrame
    {
        private static final long serialVersionUID = 8394236698316485656L;

        //private Graph graph = new MultiGraph("embedded");
        //private Viewer viewer = new Viewer(graph, Viewer.ThreadingModel.GRAPH_IN_ANOTHER_THREAD);
        private Viewer viewer = new Viewer(graph, Viewer.ThreadingModel.GRAPH_IN_SWING_THREAD);
        private View view = viewer.addDefaultView(false);

        public MyFrame() {
             setLayout(new BorderLayout());
             add(view, BorderLayout.CENTER);
             setDefaultCloseOperation(EXIT_ON_CLOSE);
        }
    }

    public static void main(String args[]) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                MyFrame frame = new MyFrame();
                frame.setSize(320, 240);
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);

                graph.addNode("A");
                graph.addNode("B");
                graph.addNode("C");
                graph.addEdge("AB", "A", "B");
                graph.addEdge("BC", "B", "C");
                graph.addEdge("CA", "C", "A");

                graph.addAttribute("ui.quality");
                graph.addAttribute("ui.antialias");
            }
        });
    }
}

它画出了这个:

如果拖动节点，它将变为：

如何获得结果，接近graph.display（）？

Answer 1

这是一个副作用，因为默认情况下节点没有x和y坐标。

为了防止这种情况，您应该:

• 使用查看器在浏览器对象上激活自动布局。enableAutoLayout（）
• 或者为每个节点指定一些x和y

// ...
public MyFrame() {
     setLayout(new BorderLayout());
     add(view, BorderLayout.CENTER);
     setDefaultCloseOperation(EXIT_ON_CLOSE);
     // Activate autolayout here : 
     viewer.enableAutoLayout();
}
// ...

// In main() ...
Node a = graph.addNode("A");
a.addAttribute("xy", 0, 0);
Node b = graph.addNode("B");
b.addAttribute("xy", 10, 0);
Node c = graph.addNode("C");
c.addAttribute("xy", 10, 10);
// ...