拓扑关系图插件之jtopo

这两天在跟产品讨论图的实现方式，给了一个同行的参考图。于是网罗了下，发现在基于canvas上写的jtopo插件。但是官方网站已经打不开了，再次上github搜索关键字，也没找到。快要放弃时，在码云上找到官网的代码。拉下来看demo，写的还是很强大的，对于目前我们来说是。后面在github上也找到demo。目前还没用于项目，进行可行性分析和维护的概率。简单代码示例：

var canvas;
var stage;
var scene;
$(function() {
    canvas = document.getElementById('canvas');
    stage = new JTopo.Stage(canvas);
    //显示工具栏
    showJTopoToobar(stage);

    scene = new JTopo.Scene(stage);
    scene.backgroundColor = "255.255.255";
    scene.mode = "drag";

    var node = new JTopo.Node("");
    node.setSize(1298, 774);
    node.setLocation(0, 0);
    node.fontColor = "255,255,0"
    node.textPosition = "Middle_Right";
    node.setImage('https://raw.githubusercontent.com/wenco/jtopo/master/project_image/main.png', true);
    node.draggable = "false";
    node.selected = "false";
    scene.add(node);
    nodes[0] = node;

    var node = new JTopo.Node("44.2");
    node.setSize(0, 0);
    node.setLocation(680, 209);
    node.fontColor = "255,255,0"
    node.textPosition = "Middle_Right";
    node.font = "14px Consolas"
    scene.add(node);
    nodes[1] = node;

    var node = new JTopo.Node("13.2");
    node.setSize(0, 0);
    node.setLocation(724, 209);
    node.fontColor = "0,255,255"
    node.textPosition = "Middle_Right";
    node.font = "14px Consolas"
    scene.add(node);
    nodes[2] = node;

    node.mousedown(function(event) {
        if(event.button == 2) {
            node.text = '按下右键';
        } else if(event.button == 1) {
            node.text = '按下中键';
        } else if(event.button == 0) {
            node.text = '按下左键';
        }
    });

    node.mouseup(function(event) {
        if(event.button == 2) {
            node.text = '松开右键';
        } else if(event.button == 1) {
            node.text = '松开中键';
        } else if(event.button == 0) {
            node.text = '松开左键';
        }
    });
    node.click(function(event) {
        console.log("单击");
    });
    node.dbclick(function(event) {
        console.log("双击");
    });
    node.mousedrag(function(event) {
        console.log("拖拽");
    });
    node.mouseover(function(event) {
        console.log("mouseover");
    });
    node.mousemove(function(event) {
        console.log("mousemove");
    });
    node.mouseout(function(event) {
        console.log("mouseout");
    });

});

示例图官方图