I have a working D3 tree that I am trying to convert to Angular. It's a v3 tree.
The component code is:
import { Component, OnInit, ViewChild, ElementRef, AfterViewInit, ViewEncapsulation } from '@angular/core';
declare var d3: any;
@Component({
selector: 'app-tree-view',
template: '<div #chart id="chart"></div>',
encapsulation: ViewEncapsulation.None,
styleUrls: ['./tree-view.component.scss']
})
export class TreeViewComponent implements AfterViewInit, OnInit {
ngOnInit(): void {
this.createChart();
}
constructor(){
}
ngAfterViewInit(): void {
this.root.update = this.update;
this.update(this.root);
}
private treeData: any[] = [{...data here}],
tree: any;
i = 0;
duration = 750;
root:any = {};
svg:any = {};
diagonal: any;
@ViewChild('chart')
private chartContainer: ElementRef;
private createChart(): void {
var margin = {top: 20, right: 120, bottom: 20, left: 120},
width = 1560 - margin.right - margin.left,
height = 1000 - margin.top - margin.bottom;
this.tree = d3.layout.tree()
.size([height, width]);
const element = this.chartContainer.nativeElement;
this.diagonal = d3.svg.diagonal().projection((d) => { return [d.y, d.x]; });
this.svg = d3.select(element).append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
this.root = this.treeData[0];
this.root.x0 = height / 2;
this.root.y0 = 0;
this.hideChildren(this.root);
console.log(this.root);
d3.select(self.frameElement).style("height", "1000px");
}
private hideChildren(node) {
if(node.children) {
node._children = node.children;
node.children = null;
node._children.forEach((a) => { this.hideChildren});
}
}
private update(source) {
// Compute the new tree layout.
var nodes = this.tree.nodes(this.root).reverse(),
links = this.tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach((d) => { d.y = d.depth * 180; });
// Update the nodes…
var node = this.svg.selectAll("g.node")
.data(nodes, (d) => { return d.id || (d.id = ++this.i ); });
// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", (d) => { return "translate(" + source.y0 + "," + source.x0 + ")"; })
.on("click", this.click);
nodeEnter.append("circle")
.attr("r", 1e-6)
.style("fill", (d) => { return d._children ? "lightsteelblue" : "#fff"; });
nodeEnter.append("text")
.attr("x", (d) => { return d.children || d._children ? -13 : 13; })
.attr("dy", ".35em")
.attr("text-anchor", (d) => { return d.children || d._children ? "end" : "start"; })
.text((d) => { return d.name; })
.style("fill-opacity", 1e-6);
// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(this.duration)
.attr("transform", (d) => { return "translate(" + d.y + "," + d.x + ")"; });
nodeUpdate.select("circle")
.attr("r", 10)
.style("fill", (d) => { return d._children ? "lightsteelblue" : "#fff"; });
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(this.duration)
.attr("transform", (d) => { return "translate(" + source.y + "," + source.x + ")"; })
.remove();
nodeExit.select("circle")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = this.svg.selectAll("path.link")
.data(links, (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", (d) => {
var o = {x: source.x0, y: source.y0};
return this.diagonal({source: o, target: o});
});
// Transition links to their new position.
link.transition()
.duration(this.duration)
.attr("d", this.diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(this.duration)
.attr("d", (d) => {
var o = {x: source.x, y: source.y};
return this.diagonal({source: o, target: o});
})
.remove();
// Stash the old positions for transition.
nodes.forEach((d) => {
d.x0 = d.x;
d.y0 = d.y;
});
console.log('end creating chart');
}
// Toggle children on click.
click(d, item) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
this.update(d);
}
}
The script is compiled into the angular.json file using
"scripts": ["src/scripts/d3.js"]
However, when I expand a node I am getting an error of
5core.js:14597 ERROR TypeError: this.update is not a function at SVGGElement.push../src/app/tree-view/tree-view.component.ts.TreeViewComponent.click (tree-view.component.ts:69898) at SVGGElement.__onclick (d3.js:1) at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:423) at Object.onInvokeTask (core.js:16147) at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:422) at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:195) at ZoneTask.push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask [as invoke] (zone.js:498) at invokeTask (zone.js:1744) at SVGGElement.globalZoneAwareCallback (zone.js:1770)
Clearly this is as scoping issue - withthis, but I don't know how to get around this. this refers to the node, not the class.
Any help would be much appreciated
Cheers KH
