如何在 JGraphX 中自动调用有机布局

Posted 2023-05-08

【中文标题】如何在 JGraphX 中自动调用有机布局

【英文标题】：How to automatically invoke an organic layout in JGraphX

【发布时间】：2016-01-07 11:44:37

【问题描述】：

我正在使用 JGraphX 库并尝试使用 mxFastOrganicLayout 执行自动布局：

import javax.swing.JFrame;
import com.mxgraph.swing.mxGraphComponent;
import com.mxgraph.view.mxGraph;

public class FastOrganic extends JFrame 
    public static void main(String[] args) 
        mxGraph graph = new mxGraph();
        Object parent = graph.getDefaultParent();
        graph.getModel().beginUpdate();
        try 
            Object v1 = graph.insertVertex(parent, null, "Hello", 20, 20, 80,
                    30);
            Object v2 = graph.insertVertex(parent, null, "World!", 240, 150,
                    80, 30);
            graph.insertEdge(parent, null, "Edge", v1, v2);
         finally 
            graph.getModel().endUpdate();
        
        mxGraphComponent graphComponent = new mxGraphComponent(graph);

        FastOrganic frame = new FastOrganic();
        frame.add(graphComponent);
        frame.pack();
        frame.setVisible(true);
    

我想了解如何应用快速有机布局，文档将其定义为mxFastOrganicLayout。问题是我不能把它变成这样的组件：

mxGraphComponent graphComponent = new mxGraphComponent(graph);

as mxGraphComponent 不采用mxFastOrganicLayout 作为构造函数，但mxFastOrganicLayout 采用mxGraph，这似乎是正确的一步？我将不胜感激任何帮助，问候。

【参考方案1】：

这是应用单个布局的方式：

    // define layout
    mxIGraphLayout layout = new mxFastOrganicLayout(graph);

    // layout graph
    layout.execute(graph.getDefaultParent());

这是在应用单个布局之前设置一些属性的方式：

    // define layout
    mxFastOrganicLayout layout = new mxFastOrganicLayout(graph);

    // set some properties
    layout.setForceConstant( 40); // the higher, the more separated
    layout.setDisableEdgeStyle( false); // true transforms the edges and makes them direct lines

    // layout graph
    layout.execute(graph.getDefaultParent());

这是你使用变形的布局方式：

    // define layout
    mxIGraphLayout layout = new mxFastOrganicLayout(graph);

    // layout using morphing
    graph.getModel().beginUpdate();
    try 
        layout.execute(graph.getDefaultParent());
     finally 
        mxMorphing morph = new mxMorphing(graphComponent, 20, 1.2, 20);

        morph.addListener(mxEvent.DONE, new mxIEventListener() 

            @Override
            public void invoke(Object arg0, mxEventObject arg1) 
                graph.getModel().endUpdate();
                // fitViewport();
            

        );

        morph.startAnimation();