cytoscape.js 图，仅显示/绘制少数节点和边缘

Posted 2023-04-18

【中文标题】cytoscape.js 图，仅显示/绘制少数节点和边缘

【英文标题】：cytoscape.js graph, shows/draws only with few nodes and edges

【发布时间】：2020-04-01 08:20:26

【问题描述】：

我正在我的网站上使用 Cytoscape.js 创建一个图表，以向管理员显示用户之间的联系。一切都很好，但有些图表没有画下来。控制台中没有错误，但画布似乎是空的。

例如，未绘制的图形有 20 个边和 18 个节点。 如果我删除一些边，则绘制并显示图形。无论我删除哪个节点或边缘：如果我达到 18 个边缘，它就会显示。所以我想“也许它太大了”。

但实际上我有更大的图（37 条边），绘制起来没有问题。

可能是什么问题？

这是一个没有显示的图表。顺便问一下，有没有可以测试这种结构的在线网站？谢谢

    "elements": 
        "nodes": [
            "data": "id": "1", 
            "data": "id": "2", 
            "data": "id": "3", 
            "data": "id": "4", 
            "data": "id": "5", 
            "data": "id": "6", 
            "data": "id": "7", 
            "data": "id": "8", 
            "data": "id": "9", 
            "data": "id": "10", 
            "data": "id": "11", 
            "data": "id": "12", 
            "data": "id": "13", 
            "data": "id": "14", 
            "data": "id": "18", 
            "data": "id": "15", 
            "data": "id": "16", 
            "data": "id": "17"
            ],
        "edges": [
            "data": 
                "source": "1",
                "target": "2"
            
        , 
            "data": 
                "source": "1",
                "target": "3"
            
        , 
            "data": 
                "source": "4",
                "target": "3"
            
        , 
            "data": 
                "source": "5",
                "target": "3"
            
        , 
            "data": 
                "source": "1",
                "target": "6"
            
        , 
            "data": 
                "source": "7",
                "target": "6"
            
        , 
            "data": 
                "source": "1",
                "target": "8"
            
        , 
            "data": 
                "source": "9",
                "target": "1"
            
        , 
            "data": 
                "source": "1",
                "target": "9"
            
        , 
            "data": 
                "source": "1",
                "target": "10"
            
        , 
            "data": 
                "source": "4",
                "target": "10"
            
        , 
            "data": 
                "source": "1",
                "target": "11"
            
        , 
            "data": 
                "source": "1",
                "target": "4"
            
        , 
            "data": 
                "source": "8",
                "target": "12"
            
        , 
            "data": 
                "source": "14",
                "target": "13"
            
        , 
            "data": 
                "source": "8",
                "target": "13"
            
        , 
            "data": 
                "source": "15",
                "target": "18"
            
        , 
            "data": 
                "source": "11",
                "target": "18"
            
        , 
            "data": 
                "source": "11",
                "target": "16"
            
        , 
            "data": 
                "source": "17",
                "target": "16"
            
        ],
    ,

【问题讨论】：

您使用的是什么布局？我用 dagre 和 grid 试了一下，节点显示出来了？

` 布局：名称：'breadthfirst'，定向：true，填充：15`

在线站点测试“这种结构”是什么意思？

【参考方案1】：

我让元素显示得很好：

var cy = window.cy = cytoscape(
  container: document.getElementById('cy'),

  boxSelectionEnabled: false,
  autounselectify: true,

  style: [
      selector: 'node',
      css: 
        'content': 'data(id)',
        'text-valign': 'center',
        'text-halign': 'center',
        'height': '60px',
        'width': '60px',
        'border-color': 'black',
        'border-opacity': '1',
        'border-width': '10px'
      
    ,
    
      selector: '$node > node',
      css: 
        'padding-top': '10px',
        'padding-left': '10px',
        'padding-bottom': '10px',
        'padding-right': '10px',
        'text-valign': 'top',
        'text-halign': 'center',
        'background-color': '#bbb'
      
    ,
    
      selector: 'edge',
      css: 
        'target-arrow-shape': 'triangle'
      
    ,
    
      selector: ':selected',
      css: 
        'background-color': 'black',
        'line-color': 'black',
        'target-arrow-color': 'black',
        'source-arrow-color': 'black'
      
    
  ],

  elements: 
    nodes: [
        data: 
          id: "1"
        
      ,
      
        data: 
          id: "2"
        
      ,
      
        data: 
          id: "3"
        
      ,
      
        data: 
          id: "4"
        
      ,
      
        data: 
          id: "5"
        
      ,
      
        data: 
          id: "6"
        
      ,
      
        data: 
          id: "7"
        
      ,
      
        data: 
          id: "8"
        
      ,
      
        data: 
          id: "9"
        
      ,
      
        data: 
          id: "10"
        
      ,
      
        data: 
          id: "11"
        
      ,
      
        data: 
          id: "12"
        
      ,
      
        data: 
          id: "13"
        
      ,
      
        data: 
          id: "14"
        
      ,
      
        data: 
          id: "15"
        
      ,
      
        data: 
          id: "16"
        
      ,
      
        data: 
          id: "17"
        
      ,
      
        data: 
          id: "18"
        
      
    ],
    edges: [
        data: 
          source: "1",
          target: "2"
        
      ,
      
        data: 
          source: "1",
          target: "3"
        
      ,
      
        data: 
          source: "4",
          target: "3"
        
      ,
      
        data: 
          source: "5",
          target: "3"
        
      ,
      
        data: 
          source: "1",
          target: "6"
        
      ,
      
        data: 
          source: "7",
          target: "6"
        
      ,
      
        data: 
          source: "1",
          target: "8"
        
      ,
      
        data: 
          source: "9",
          target: "1"
        
      ,
      
        data: 
          source: "1",
          target: "9"
        
      ,
      
        data: 
          source: "1",
          target: "10"
        
      ,
      
        data: 
          source: "4",
          target: "10"
        
      ,
      
        data: 
          source: "1",
          target: "11"
        
      ,
      
        data: 
          source: "1",
          target: "4"
        
      ,
      
        data: 
          source: "8",
          target: "12"
        
      ,
      
        data: 
          source: "14",
          target: "13"
        
      ,
      
        data: 
          source: "8",
          target: "13"
        
      ,
      
        data: 
          source: "15",
          target: "18"
        
      ,
      
        data: 
          source: "11",
          target: "18"
        
      ,
      
        data: 
          source: "11",
          target: "16"
        
      ,
      
        data: 
          source: "17",
          target: "16"
        
      
    ]
  ,

  layout: 
    name: 'breadthfirst',
    directed: true,
    padding: 15
  
);

body 
  font: 14px helvetica neue, helvetica, arial, sans-serif;


#cy 
  height: 100%;
  width: 100%;
  position: absolute;
  left: 0;
  top: 0;
  float: left;

<html>

<head>
  <meta charset=utf-8 />
  <meta name="viewport" content="user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, minimal-ui">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/cytoscape/3.2.17/cytoscape.min.js"></script>
</head>

<body>
  <div id="cy"></div>
</body>

</html>

【讨论】：

我发现没有directed:true 也适用于我。无论如何，您的也可以使用该属性。嗯……

您可以发布您的代码的最小版本（html、css 和 js），这样我们就可以准确找出问题所在