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背景

我对GraphStream和都是新手Java。但是，我确实有使用其他 OOP 语言的经验，例如C++. 我个人觉得教程GraphStream很少，例如LayoutAPI 没有提到哪些布局算法是有效的。因此，我正在寻找更综合的教程。

问题

使用GraphStream，我希望能够执行以下基本操作：

  • 将图形导入为.dgs
  • 将图形导入为.csv
  • 从自动布局更改为指定布局（请首先列出哪些也是有效的）
  • 更改所有边缘属性（例如重量）
  • 从s到t最多找到n条长度为l或更短的路径。
  • 添加一个事件（例如单击节点，获取有关从该节点显示的路径长度的用户输入，适当地修剪/增长）

代码

笔记

我正在使用 Eclipse。从GraphStream存储库中，我已将以下内容添加到我的构建路径中：gs-algo-1.3、gs-core-1.3、gs-openord-master和gs-ui-1.3

//import anything I might need
import org.graphstream.graph.*;
import org.graphstream.graph.implementations.*;
import org.graphstream.stream.file.*;
import org.graphstream.algorithm.*;
import org.graphstream.ui.layout.*;
import java.io.IOException;
@SuppressWarnings("unused")

public class pleaseHelpMe {
    public static void main(String args[]) throws IOException, InterruptedException {
        //do something that was in some code somewhere... 
        //please explain
        System.setProperty("org.graphstream.ui.renderer","org.graphstream.ui.j2dviewer.J2DGraphRenderer");


        //instantiate a graph
        Graph graph = new SingleGraph("thisGraphNeedsHelp");
        graph.addAttribute("ui.antialias"); //this does something...
        graph.addAttribute("ui.quality"); //this sounds less important...
        graph.setAttribute("ui.stylesheet", "url(../myStyle.css);"); //get some style

        //errors, errors everywhere
        //OpenOrdLayout layout = new OpenOrdLayout();
        //layout.init(graph);
        //layout.compute();

        //changing all edges layout.weight is not that simple
        //graph.setAttribute("edges","layout.weight:4");

        graph.dsiplay();//this just makes the canvas?

        FileSource source = new FileSourceDGS(); //prep. to get a file


        //make graph a sink of source to get the contents of the file
        source.addSink(graph);

        source.begin("../dgs_files/awesomeFile.dgs");//read the file? strange command name i.m.o. file below.

        while(source.nextEvents()); //keep graph interactive? or is this the GraphStream version of readline?

        source.end() //close file? or end interaction?


        //find paths
        //get user input

    }
}

在此处输入图像描述

DGS 文件

DGS004
null 0 0
an a ui.label:a
an b ui.label:b
an c ui.label:c
an d ui.label:d
an e ui.label:e
an f ui.label:f
ae a_c a > c
ae c_e c > e
ae e_a e > a
ae b_d b > d
ae d_f d > f
ae f_b f > b
ae f_a f > a
ae e_b e > b
ae d_c d > c

CSS 文件

node:clicked {
    fill-color: purple;
    text-size:    16;
    text-style:   bold;
    text-color:   #FFF;
    text-alignment: at-right; 
    text-padding: 3px, 2px; 
    text-background-mode: rounded-box; 
    text-background-color: #A7CC; 
    text-color: white; 
    text-offset: 5px, 0px; 
}

node {
    size:         20px;
    shape:        circle;
    fill-color:   #8facb4;
    stroke-mode:  plain;
    stroke-color: black;

}

edge {
    size:           2px;
    fill-mode:      plain;
    /*changing edge layout here also doesn't work*/
}

/*edge:clicked isn't a thing... :( */
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