我正在尝试迁移（以前工作的）可折叠树程序以在Typescript v3.3和d3 v5.9下工作。我已将其更改为与新的d3扁平名称空间一起使用。问题似乎是它现在没有在下面的代码中填充treeData。道歉，如果它很明显。我已经尝试调试，现在在进行逻辑或测试后，它会直接跳到forEach块的末尾。 感谢你给与我的帮助。我对发布问题感到有些不安，因为我最后一个问题被否决了，我不确定为什么。
var treeData = [];
data.forEach(function(node) {
// add to parent
var parent = dataMap[node.parent];
if (parent) {
// create child array if it doesn't exist
(parent.children || (parent.children = []))
// add node to child array
.push(node);
} else {
// parent is null or missing
treeData.push(node);
}
});
完整代码为
import { Component, OnInit, ViewEncapsulation } from '@angular/core';
import * as d3 from 'd3';
@Component({
selector: 'app-depthtree',
encapsulation: ViewEncapsulation.None, // Stops Angular from renaming class names in the CSS.
// D3 generates it's own HTML which Angular doesn't know
// about, so there is a mismatch between class names
templateUrl: './depthtree.component.html',
styleUrls: ['./depthtree.component.scss']
})
export class DepthtreeComponent implements OnInit {
constructor() {
this.drawDepthTree();
}
ngOnInit() {
}
drawDepthTree():void {
var data =[{"sid":"1","parent":"null","name_ar":"Hashim"},{"sid":"2","parent":"1","name_ar":"wahb"},{"sid":"3","parent":"1","name_ar":"Abdulmuttaleb"},{"sid":"4","parent":"2","name_ar":"Amina"},{"sid":"5","parent":"3","name_ar":"Abutaleb"},{"sid":"6","parent":"3","name_ar":"Abdulla"},{"sid":"7","parent":"3","name_ar":"Abbas"},{"sid":"8","parent":"3","name_ar":"Hamza"},{"sid":"9","parent":"6","name_ar":"Mohammed (Prophet)"},{"sid":"10","parent":"9","name_ar":"Alqassim"},{"sid":"11","parent":"9","name_ar":"Um Kalthoum"},{"sid":"12","parent":"9","name_ar":"Zainab"},{"sid":"13","parent":"9","name_ar":"Ruqaya"},{"sid":"14","parent":"9","name_ar":"Fatima"},{"sid":"15","parent":"9","name_ar":"Ibrahim"},{"sid":"16","parent":"9","name_ar":"Abdulla"},{"sid":"17","parent":"9","name_ar":"Muhsen"},{"sid":"18","parent":"5","name_ar":"Ali"},{"sid":"19","parent":"18","name_ar":"Hassan"},{"sid":"20","parent":"18","name_ar":"Hussain"},{"sid":"21","parent":"20","name_ar":"Ali Zain Alabbideen"},{"sid":"22","parent":"21","name_ar":"Mohammed Baqer"},{"sid":"23","parent":"22","name_ar":"Jafar Sadeq"},{"sid":"24","parent":"23","name_ar":"Mousa Kadim"},{"sid":"25","parent":"24","name_ar":"Ali AlAreed"},{"sid":"26","parent":"24","name_ar":"Ibrahim Murtada"},{"sid":"27","parent":"26","name_ar":"Mousa (the second)"},{"sid":"28","parent":"27","name_ar":"Ahmed"},{"sid":"29","parent":"28","name_ar":"Hussain"},{"sid":"30","parent":"29","name_ar":"Abu Alqassim Mohammed"},{"sid":"31","parent":"30","name_ar":"Najm Aldeen Mahdi"}];
//need to find a way to dynamically set the "Width" as the tree is very deep
var margin = {top: 25, right: 120, bottom: 20, left: 120},
width = 1000 - margin.right - margin.left,
height = 500 - margin.top - margin.bottom;
var i = 0,
duration = 750,
rectW = 100,
rectH = 30,
root;
// zoom functionality
var zoom = d3.zoom()
.scaleExtent([1, 10])
.on("zoom", zoomed);
var tree = d3.tree()
.nodeSize([110, 50]); // increased to 110 to avoid node overlap
//var diagonal = d3.svg.diagonal()
// .projection(function (d) { return [d.x + rectW / 2, d.y + rectH / 2]; });
var diagonal = d3.linkHorizontal()
.x(function(d) {
return (d.x + rectW);
})
.y(function(d) {
return (d.y + rectH /2);
});
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.call(zoom) // added to call to zoom to enable zooming; it works :}
.on("wheel.zoom", null) // disable zooming on mouse wheel scroll
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
//create a name-based map for the nodes
//which starts with an empty object and iterates over the data array, adding an entry for each node
//for the flat array
var dataMap = data.reduce(function(map, node) {
map[node.sid] = node;
return map;
}, {});
//iteratively add each child to its parents, or to the root array if no parent is found
//for the flat array
var treeData = [];
data.forEach(function(node) {
// add to parent
var parent = dataMap[node.parent];
if (parent) {
// create child array if it doesn't exist
(parent.children || (parent.children = []))
// add node to child array
.push(node);
} else {
// parent is null or missing
treeData.push(node);
}
});
root = treeData[0];
root.x0 = height / 2; // should this be width/2 for the vertical?
root.y0 = 0;
//testing using depth to open at a specified level
//var nodes = tree.nodes(root);
function collapseLevel(d) {
if (d.children && d.depth > 1) {
d._children = d.children;
d._children.forEach(collapseLevel);
d.children = null;
} else if (d.children){
d.children.forEach(collapseLevel);
}
}
root.children.forEach(collapseLevel);//iterate each node and collapse excluding node zero
update(root);
d3.select(self.frameElement).style("height", "500px");
//zoom (drag the tree around !)
function zoomed() {
svg.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
}
function update(source) {
// Compute the new tree layout.
//var nodes = tree.nodes(root).reverse(),
// links = tree.links(nodes);
// create a hierarchy from the root
const treeRoot = d3.hierarchy(root)
tree(treeRoot);
// nodes
const nodes = treeRoot.descendants()
// links
const links = treeRoot.links()
// Normalize for fixed-depth.
nodes.forEach(function(d) { d.y = d.depth * 180; });
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) { return d.id || (d.id = ++i); });
// Enter any new nodes at the parent's previous position.
//vertical tree by swaping y0 and x0
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + source.x0 + "," + source.y0 + ")"; })
.on("click", click)
.on("mouseover", function(d) {
var g = d3.select(this); // The node
var info = g.append('text')
.classed('info', true)
.attr('x', 20)
.attr('y', 10)
.text(function(d) { return d.name_ar + " " + d.sid });
})
.on("mouseout", function() {
// Remove the info text on mouse out.
d3.select(this).select('text.info').remove()
});
;
//rectagular nodes
nodeEnter.append("rect")
.attr("width", rectW)
.attr("height", rectH)
.attr("stroke", "black")
.attr("stroke-width", 1)
.style("fill", function (d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeEnter.append("text")
.attr("x", rectW / 2)
.attr("y", rectH / 2)
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.text(function(d) { return d.name_ar; })
.style("fill-opacity", 1);
// Transition nodes to their new position.
//vertical
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
nodeUpdate.select("rect")
.attr("width", rectW)
.attr("height", rectH)
.attr("stroke", "black")
.attr("stroke-width", 1)
.style("fill", function (d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
//vertical
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + source.x + "," + source.y + ")"; })
.remove();
nodeExit.select("rect")
.attr("width", rectW)
.attr("height", rectH)
.attr("stroke", "black")
.attr("stroke-width", 1);
nodeExit.select("text");
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) { return d.target.id; });
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function(d) {
var o = {x: source.x0, y: source.y0};
return diagonal({source: o, target: o});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
}
}