import { Component, Input, Output, OnInit, OnChanges } from '@angular/core';
import { ViewComponent } from '../view/view.component';
import { HitoService } from '../../services/hito.service';
@Component({
selector: 'app-time-line',
templateUrl: './time-line.component.html',
styleUrls: ['./time-line.component.css'],
providers: [HitoService]
})
export class TimeLineComponent implements OnChanges, OnInit {
@Input() calbuscador: String;
@Input() idcalbuscador: String;
public pepe: String
nom_cal1: any;
hito1: any = {};
hito2: any = {};
constructor(public _hitoService: HitoService) {
}
ngOnInit() {
}
///we retrieve the value sento to this component in OnChanges
ngOnChanges() {
this.nom_cal1 = this.calbuscador;
this.drawtimeline(this.nom_cal1, this._hitoService, this.idcalbuscador);
}
result: any[] = [];
drawtimeline(nom_cal, _hitoService, idcalbuscador) {
var container = document.getElementById('timeLine');
//alert("id cal sele es :" + idcalbuscador);
var k = 0;
var j = 0;
var master = new vis.DataSet();
var items = new vis.DataSet();
this.result.push({ "_id": this.idcalbuscador,
"title": nom_cal });
this.result.forEach(function (ev) {
master.add([{ id: ev._id, content: ev.title, cal_id: ev._id }]);
var g = ev._id;
for (var i= 0; i<this.result.length; i++){
console.log("hola");
console.log(this.result[i]._id);
this._hitoService.getHitos(this.result[i]._id)
.subscribe(hito2 => {
this.hito2 = hito2
var items: any;
items = hito2;
items.forEach(function (item) {
items.add([{ id: k, group: g, start: item.start_datetime, end: item.end_datetime, style: itemStyle(item.design), className: "pepe" }]);
k++;
});
j++;
});
}
});
我正在尝试使用vis.js实现时间轴,我在此类组件中检索时间轴想要的名称和id然后在ngOnChanges
我调用函数来绘制传递给它的时间轴时间线的名称,它的id以及其他服务以获取此特定时间线的observables项目。我有一个数组,它将存储我想要查看的时间轴(结果),然后是我订阅的可观察项,以添加时间轴的项目。第一个foreach()
将删除结果数组中的第一个元素,获取该结果的项目的可观察项,第二个foreach()
将通过observables项目并打印项目,然后重新开始并移动到下一个。但我在浏览器控制台中获得的只有:TypeError: this is undefined
。可能没有在forach()
答案 0 :(得分:2)
您可以使用forEach中的箭头功能继续使用封闭范围。
this.result.forEach((ev) => {
// your code here
}
&#13;
答案 1 :(得分:1)
将当前this
分配给另一个变量(例如,that
),然后在回调中使用that
。
注意:您的回调函数this
内部已更改为调用该函数的JavaScript上下文。
const that = this; // save the current 'this' to 'that' variable
this.result.forEach(function (ev) {
master.add([{ id: ev._id, content: ev.title, cal_id: ev._id }]);
var g = ev._id;
for (var i= 0; i< that.result.length; i++){
console.log("hola");
console.log(that.result[i]._id);
that._hitoService.getHitos(that.result[i]._id)
.subscribe(hito2 => {
that.hito2 = hito2
var items: any;
items = hito2;
....
....
....