我正在尝试以编程方式在可折叠树中打开 d3.js Node :
我使用以下 d3.js 片段加载数据(在第二级之后折叠 Node ),
d3.json("js/ontology.json", function(error, treeData) {
if (error) throw error;
root = d3.hierarchy(treeData, function(d) { return d.children; });
root.x0 = height / 2;
root.y0 = 0;
// Collapse after the second level:
root.children.forEach(collapse);
update(root);
});
然后我使用以下 d3.js 代码var nodeEnter = node.enter().append('g')
.attr('class', 'node')
.attr('node-name', d => d.data.name.toLowerCase())
.attr("transform", function(d) {
return "translate(" + source.y0 + "," + source.x0 + ")";
})
.on('click', click);
和这个功能function expandNode() {
const node = d3.select('.node[node-name="Nature"]').node();
console.log('NODE: ', node);
node.dispatchEvent(new Event('click'));
}
expandNode();
以编程方式打开“自然” Node 。但是,当我用“地球”(“自然”的嵌套子 Node ,不可见)替换“自然”(可见 Node )时,这个表达式
const node = d3.select('.node[node-name="Earth"]').node();
只有当它可见时才会展开“地球” Node 。如果“地球”不可见,该语句将不会扩展“自然”以显示“地球”(并随后扩展“地球”)。
建议?
编辑 1. 这与我之前的 StackOverflow 问题密切相关,
Programmatically opening d3.js v4 collapsible tree nodes?
如果需要,请引用那里引用的 JSFiddle,
https://jsfiddle.net/vstuart/acx5zfgn/62/
标签不同,但数据和代码相似。
编辑 2。后续问题
Accessing promised data in d3.js v6 [programmatically opening nested collapsed nodes]
关系到:
本体.json
{ "name": "Root",
"children": [
{ "name": "Culture",
"children": [
{ "name": "LGBT" }
]
},
{ "name": "Nature",
"id": "nature",
"children": [
{ "name": "Earth",
"id": "earth",
"children": [
{ "name": "Environment" },
{ "name": "Geography" },
{ "name": "Geology" },
{ "name": "Geopolitical" },
{ "name": "Geopolitical - Countries" },
{ "name": "Geopolitical - Countries - Canada" },
{ "name": "Geopolitical - Countries - United States" },
{ "name": "Nature" },
{ "name": "Regions" }
]
},
{ "name": "Cosmos" },
{ "name": "Outer space" }
]
},
{ "name": "Humanities",
"children": [
{ "name": "History" },
{ "name": "Philosophy" },
{ "name": "Philosophy - Theology" }
]
},
{ "name": "Miscellaneous",
"children": [
{ "name": "Wikipedia",
"url": "https://wikipedia.com" },
{ "name": "Example.com",
"url": "https://example.com" }
]
},
{ "name": "Science",
"children": [
{ "name": "Biology" },
{ "name": "Health" },
{ "name": "Health - Medicine" },
{ "name": "Sociology" }
]
},
{ "name": "Technology",
"children": [
{ "name": "Computers" },
{ "name": "Computers - Hardware" },
{ "name": "Computers - Software" },
{ "name": "Computing" },
{ "name": "Computing - Programming" },
{ "name": "Internet" },
{ "name": "Space" },
{ "name": "Transportation" }
]
},
{ "name": "Society",
"children": [
{ "name": "Business" },
{ "name": "Economics" },
{ "name": "Economics - Business" },
{ "name": "Economics - Capitalism" },
{ "name": "Economics - Commerce" },
{ "name": "Economics - Finance" },
{ "name": "Politics" },
{ "name": "Public services" }
]
}
]
}
最佳答案
您需要递归地发现 Node 祖先,然后将它们扩展一:
const findNodeAncestors = (root, name) => {
if (root.name === name) {
return [name];
}
if (root.children) {
for (let i = 0; i < root.children.length; i++) {
const chain = findNodeAncestors(root.children[i], name);
if (chain) {
chain.push(root.name);
return chain;
}
}
}
return null;
};
const chain = findNodeAncestors(treeData.data, 'Earth');
for (let i = chain.length - 1; i >= 0; i--) {
const node = d3.select(`.node[node-name="${chain[i]}"]`);
const nodeData = node.datum();
if (!nodeData.children && nodeData.data.children) { // Node has children and collapsed
node.node().dispatchEvent(new Event('click')); // Expand the node
}
}
看到它在 fiddle 中工作.
关于javascript - 在 d3.js v4 中以编程方式打开嵌套、折叠(隐藏) Node ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/67527258/