cytoscape.js 中标签文本的多个数据值

Question

我正在尝试向 cytoscape.js 中的标签添加多个值，如下所示 -

{
    "selector": "edge",
    "style": {
        "curve-style": "haystack",
        "text-wrap": "wrap",
        "label": "data(count)" + "data(edgevalue)",
        "font-size": "8px",
        "color": "black",
        "haystack-radius": "0.5",
        "opacity": "0.4",
        "line-color": "#bbb",
        "width": "mapData(weight, 0, 1, 1, 8)",
    }
},

然而，这实际上只是显示 -

data(count)data(edgevalue)

作为标签文本。如果我删除一个或另一个，它会为每个打印正确的值。我尝试为换行符添加一个 '\n'，它创建了一个换行符，但值与上面的相同。

我也试过data(count + edgevalue)没有用。

如何在标签文本中实现多个数据属性？

Answer 1

您可以使用映射器将正确的数据放入您的样式中：映射器

另外，我通常使用模板字符串：

{
    label: function (element) { 
        return `${element.data("attribute_01")} + ${element.data("attribute_02")}`
    }
}

在这里你可以看到一个简单的例子：

{
    label: function (element) { 
        return `${element.data("attribute_01")} + ${element.data("attribute_02")}`
    }
}

document.addEventListener("DOMContentLoaded", function() {
  var cy = (window.cy = cytoscape({
    container: document.getElementById("cy"),

    // demo your layout
    layout: {
      name: "klay"

      // some more options here...
    },

    style: [{
        selector: "node",
        style: {
          "background-color": "#dd4de2"
        }
      },
      {
        selector: ".leaf",
        style: {
          "background-color": "#000"
        }
      },
      {
        selector: "edge",
        style: {
          "curve-style": "bezier",
          "target-arrow-shape": "triangle",
          "line-color": "#dd4de2",
          "target-arrow-color": "#dd4de2",
          "opacity": "0.5",
          "label": function(node) {
            return `${node.data("source")} -> ${node.data("target")}`
          }
        }
      }
    ],
    elements: {
      nodes: [{
          data: {
            id: "n0"
          }
        },
        {
          data: {
            id: "n1"
          }
        },
        {
          data: {
            id: "n2"
          }
        },
        {
          data: {
            id: "n3"
          }
        },
        {
          data: {
            id: "n4"
          }
        },
        {
          data: {
            id: "n5"
          }
        },
        {
          data: {
            id: "n6"
          }
        },
        {
          data: {
            id: "n7"
          }
        },
        {
          data: {
            id: "n8"
          }
        },
        {
          data: {
            id: "n9"
          }
        },
        {
          data: {
            id: "n10"
          }
        },
        {
          data: {
            id: "n11"
          }
        },
        {
          data: {
            id: "n12"
          }
        },
        {
          data: {
            id: "n13"
          }
        },
        {
          data: {
            id: "n14"
          }
        },
        {
          data: {
            id: "n15"
          }
        }
      ],
      edges: [{
          data: {
            source: "n0",
            target: "n1"
          }
        },
        {
          data: {
            source: "n1",
            target: "n2"
          }
        },
        {
          data: {
            source: "n1",
            target: "n3"
          }
        },
        {
          data: {
            source: "n2",
            target: "n4"
          }
        },
        {
          data: {
            source: "n4",
            target: "n5"
          }
        },
        {
          data: {
            source: "n4",
            target: "n6"
          }
        },
        {
          data: {
            source: "n6",
            target: "n7"
          }
        },
        {
          data: {
            source: "n6",
            target: "n8"
          }
        },
        {
          data: {
            source: "n8",
            target: "n9"
          }
        },
        {
          data: {
            source: "n8",
            target: "n10"
          }
        },
        {
          data: {
            source: "n10",
            target: "n11"
          }
        },
        {
          data: {
            source: "n11",
            target: "n12"
          }
        },
        {
          data: {
            source: "n12",
            target: "n13"
          }
        },
        {
          data: {
            source: "n13",
            target: "n14"
          }
        },
        {
          data: {
            source: "n13",
            target: "n15"
          }
        }
      ]
    }
  }));

  cy.nodes().leaves().addClass("leaf");
});

body {
  font-family: helvetica neue, helvetica, liberation sans, arial, sans-serif;
  font-size: 14px;
}

#cy {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  right: 0;
  z-index: 999;
}