Created
September 30, 2016 07:52
-
-
Save sgruhier/f7de65ec205d4f364f752e2347eee8c6 to your computer and use it in GitHub Desktop.
ng2
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import { Component, OnChanges, OnDestroy, SimpleChange, ElementRef, Input } from '@angular/core'; | |
| import { D3Service } from 'd3-ng2-service'; | |
| import { BaseChart } from '../base.chart'; | |
| @Component({ | |
| selector: 'app-piechart', | |
| template: `<ng-content></ng-content>`, | |
| styleUrls: ['./piechart.component.scss'], | |
| }) | |
| export class PiechartComponent extends BaseChart implements OnChanges, OnDestroy { | |
| @Input() data: Array<any>; | |
| @Input() startAngle: number = 0; | |
| @Input() endAngle: number = 360; | |
| @Input() padAngle: number = 0; | |
| @Input() cornerRadius: number = 0; | |
| @Input() duration: number = 1000; | |
| private arc; | |
| private pie; | |
| private colors; | |
| constructor(private element: ElementRef, private d3Service: D3Service) { | |
| super(element, d3Service); | |
| this.colors = this.d3.scaleOrdinal(this.d3.schemeCategory20c); | |
| } | |
| prepare(): void { | |
| this.pie = this.d3.pie() | |
| .sort(null) | |
| .startAngle(this.startAngle) | |
| .endAngle(this.endAngle) | |
| .value((d: any) => d.value); | |
| this.arc = this.d3.arc() | |
| .outerRadius(this.height / 2) | |
| .innerRadius(this.height / 4) | |
| .padAngle(this.padAngle) | |
| .cornerRadius(this.cornerRadius); | |
| this.svg | |
| .append('g') | |
| .attr('transform', 'translate(' + [this.width / 2, this.height / 2] + ')'); | |
| } | |
| draw(changes: { [propKey: string]: SimpleChange }): void { | |
| let arc = this.arc; | |
| let d3 = this.d3; | |
| function arcTween(a) { | |
| // First draw, set current to empty pie to have initial animation | |
| if (!this._current) { | |
| this._current = Object.assign({}, a, { startAngle: 2 * Math.PI, endAngle: 2 * Math.PI }); | |
| } | |
| const i = d3.interpolate(this._current, a); | |
| this._current = i(1); | |
| return (t) => arc(i(t)); | |
| } | |
| function arcTweenOut(a) { | |
| let i = d3.interpolate(this._current, { startAngle: 0, endAngle: 0, value: 0 }); | |
| this._current = i(0); | |
| return (t) => arc(i(t)); | |
| } | |
| const g = this.svg.select('g'); | |
| // Add new arcs | |
| let pieG = g.selectAll('.pie').data(this.pie(this.data), (d) => d.data.key); | |
| pieG.enter() | |
| .append('path') | |
| .attr('class', 'pie') | |
| .attr('d', this.arc) | |
| .attr('stroke', 'gray') | |
| .attr('fill', (d, i) => d.data.color || this.colors(i % 20)); | |
| // Run transition/exit on arcs | |
| pieG = g.selectAll('.pie').data(this.pie(this.data), (d) => d.data.key); | |
| pieG.transition() | |
| .duration(this.duration) | |
| .attrTween('d', arcTween); | |
| pieG.exit() | |
| .transition() | |
| .duration(this.duration) | |
| .attrTween('d', arcTweenOut) | |
| .remove(); | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment