d3.js node.path()用法及代码示例

d3.js中的node.path()函数用于返回源节点和目标节点之间的最短路径。

用法:

node.path(target);

参数：此函数接受上面给定并在下面描述的单个参数：

target:此参数接受目标节点。

返回值：该函数返回一个数组。

下面给出的是上面给出的函数的一些例子。

范例1：从根节点到任何其他节点的路径。

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8" /> 
    <meta name="viewport" path1tent= 
        "width=device-width, initial-scale = 1.0" /> 
  
    <script src= 
        "https://d3js.org/d3.v4.min.js"> 
    </script> 
</head> 
  
<body> 
    <script> 
        // Constructing a tree 
        var tree = { 
            name:"rootNode", 
            children:[ 
                { 
                    name:"child1" 
                }, 
                { 
                    name:"child2", 
                    children:[ 
                        { 
                            name:"grandchild1", 
                            children:[ 
                                { name:"grand granchild1" }, 
                                { name:"grand granchild2" } 
                            ] 
                        }, 
                    ] 
                }, 
                { 
                    name:"child3", 
                    children:[ 
                        { name:"grandchild2" }, 
                        { name:"grandchild3" }, 
                        { name:"grandchild4" }, 
                        { name:"grandchild5" } 
                    ] 
                } 
            ] 
        }; 
  
        var obj = d3.hierarchy(tree); 
  
        // Printing path from rootnode 
        // to grand granchild1 
        console.log(obj.path(obj.children[1]. 
            children[0].children[0])); 
  
        console.log("Printing path from rootnode"  
                + "to grand granchild1:"); 
  
        let path = obj.path(obj.children[1] 
                .children[0].children[0]); 
  
        console.log(path[0].data.name + "->"  
                + path[1].data.name + "->" 
                + path[2].data.name + "->"  
                + path[3].data.name);         
    </script> 
</body> 
  
</html>

输出：

范例2：以下代码演示了从任何节点到任何其他节点的路径。

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8" /> 
    <meta name="viewport" path1tent= 
        "width=device-width, initial-scale = 1.0" /> 
    <script src= 
        "https://d3js.org/d3.v4.min.js"> 
    </script> 
</head> 
  
<body> 
    <script> 
        // Constructing a tree 
        var tree = { 
            name:"rootNode", 
            children:[ 
                { 
                    name:"child1" 
                }, 
                { 
                    name:"child2", 
                    children:[ 
                        { 
                            name:"grandchild1", 
                            children:[ 
                                { name:"grand granchild1" }, 
                                { name:"grand granchild2" } 
                            ] 
                        }, 
                    ] 
                }, 
                { 
                    name:"child3", 
                    children:[ 
                        { name:"grandchild2" }, 
                        { name:"grandchild3" }, 
                        { name:"grandchild4" }, 
                        { name:"grandchild5" } 
                    ] 
                } 
            ] 
        }; 
  
        var obj = d3.hierarchy(tree); 
  
        // Printing path from any node to 
        // any other node 
        var grandchild3 = obj.children[2].children[1]; 
        var child2 = obj.children[1]; 
        console.log(grandchild3.path(child2)); 
  
        console.log("Printing path from anynode to"  
                + " any other node "); 
        let path = grandchild3.path(child2); 
  
        console.log(path[0].data.name + "->"  
                + path[1].data.name + "->" 
                + path[2].data.name + "->"  
                + path[3].data.name); 
    </script> 
</body> 
  
</html>

输出：

相关用法

注：本文由纯净天空筛选整理自tarun007大神的英文原创作品 D3.js node.path() Function。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。