Charts ng2图表:评估“数据”时出错;“鼠标移动”;
我正在尝试显示线条图的Charts ng2图表:评估“数据”时出错;“鼠标移动”;,charts,import,typescript,angular,systemjs,Charts,Import,Typescript,Angular,Systemjs,我正在尝试显示线条图的ng2图表示例代码 折线图显示正确。但是,当我在图形上悬停时,在计算“mousemove”时出现了一个错误 我已经通过npm安装了ng2图表,通过bower安装了Chart.js,正如quickstart中建议的那样 这是我正在使用的SystemJS配置: System.config({ map: { "ng2-charts": "node_modules/ng2-charts" }, pack
ng2图表
示例代码
折线图显示正确。但是,当我在图形上悬停时,在计算“mousemove”时出现了一个错误
我已经通过npm安装了ng2图表
,通过bower安装了Chart.js
,正如quickstart中建议的那样
这是我正在使用的SystemJS配置:
System.config({
map: {
"ng2-charts": "node_modules/ng2-charts"
},
packages: {
transpiler: 'typescript',
typescriptOptions: { emitDecoratorMetadata: true },
app: { format: 'register', defaultExtension: 'js' },
"ng2-charts": { defaultExtension: 'js' }
}
});
System.import('./app/boot')
.then(null, console.error.bind(console));
关于导入ng2图表的方法
,我做了一些测试,有些结果我无法解释:
1/无任何
:
ReferenceError: Chart is not defined
Bower不是应该为我处理所有的UI依赖项吗?除此之外,图形不会显示,但当我将鼠标悬停在它应该显示的区域时,在计算“mousemove”时出现了一个错误
2/带有
:
ReferenceError: Chart is not defined
我在控制台中没有任何错误,但没有显示任何图形,也没有“幽灵线图形不可悬停”的奇怪行为
3/带有CDN:
ReferenceError: Chart is not defined
如果1.0.2版本为
,则与2/中的行为相同
如果是0.2.0版本,
,最终会显示折线图,但在计算“mousemove”
时,我仍然有一个错误
下面是计算“mousemove”时出现的错误的一些详细信息
:
从我的节点\u模块
深入研究charts.ts的悬停
方法时,我发现:
public hover(evt) {
console.log(evt); // I added this line
let atEvent = this.chart.getPointsAtEvent || this.chart.getBarsAtEvent || this.chart.getSegmentsAtEvent;
console.log(atEvent); // I added this line
let activePoints = atEvent.call(this.chart, evt);
if (activePoints.length > 0) {
let activeLabel = activePoints[0].label;
let activePoint = activePoints[0].value;
this.chartHover.emit({activePoints: activePoints, activePoint: activePoint, activeLabel: activeLabel});
} else {
console.log('not point');
}
}
根据我添加的日志,似乎atEvent
实际上是null
,如错误细节所述
我希望我已经给了你足够的信息来帮助我
提前谢谢你
编辑:
ReferenceError: Chart is not defined
以下是整个charts.ts
文件:
import {
Component, View,
Directive, AfterViewChecked, OnDestroy, OnInit,
EventEmitter, ElementRef, Input
} from 'angular2/core';
import {CORE_DIRECTIVES, FORM_DIRECTIVES, NgClass} from 'angular2/common';
declare var Chart:any;
@Component({
selector: 'chart, canvas[chart]',
template: `<canvas></canvas>`,
directives: [CORE_DIRECTIVES, NgClass]
})
export class Charts {
constructor(element:ElementRef) {
}
}
@Component({
selector: 'base-chart',
properties: [
'data',
'labels',
'series',
'colours',
'chartType',
'legend',
'options'
],
inputs: ['chartClick', 'chartHover'],
template: `
<canvas style="width: 100%; height: 100%;" (click)="click($event)" (mousemove)="hover($event)"></canvas>
`,
directives: [CORE_DIRECTIVES, FORM_DIRECTIVES, NgClass]
})
export class BaseChart implements OnInit, OnDestroy {
private ctx:any;
private cvs:any;
private parent:any;
private chart:any;
private _data:Array<any> = [];
private labels:Array<any> = [];
private options:any = {responsive: true};
private _chartType:string;
private series:Array<any> = [];
private colours:Array<any> = [];
private legend:boolean;
private legendTemplate:any;
private initFlag:boolean = false;
private chartClick:EventEmitter<any> = new EventEmitter();
private chartHover:EventEmitter<any> = new EventEmitter();
private defaultsColours:Array<any> = [
{
fillColor: 'rgba(151,187,205,0.2)',
strokeColor: 'rgba(151,187,205,1)',
pointColor: 'rgba(151,187,205,1)',
pointStrokeColor: '#fff',
pointHighlightFill: '#fff',
pointHighlightStroke: 'rgba(151,187,205,0.8)',
color: 'rgba(151,187,205,1)',
highlight: 'rgba(151,187,205,0.8)'
}, {
fillColor: 'rgba(220,220,220,0.2)',
strokeColor: 'rgba(220,220,220,1)',
pointColor: 'rgba(220,220,220,1)',
pointStrokeColor: '#fff',
pointHighlightFill: '#fff',
pointHighlightStroke: 'rgba(220,220,220,0.8)',
color: 'rgba(220,220,220,1)',
highlight: 'rgba(220,220,220,0.8)'
}, {
fillColor: 'rgba(247,70,74,0.2)',
strokeColor: 'rgba(247,70,74,1)',
pointColor: 'rgba(247,70,74,1)',
pointStrokeColor: '#fff',
pointHighlightFill: '#fff',
pointHighlightStroke: 'rgba(247,70,74,0.8)',
color: 'rgba(247,70,74,1)',
highlight: 'rgba(247,70,74,0.8)'
}, {
fillColor: 'rgba(70,191,189,0.2)',
strokeColor: 'rgba(70,191,189,1)',
pointColor: 'rgba(70,191,189,1)',
pointStrokeColor: '#fff',
pointHighlightFill: '#fff',
pointHighlightStroke: 'rgba(70,191,189,0.8)',
color: 'rgba(70,191,189,1)',
highlight: 'rgba(70,191,189,0.8)'
}, {
fillColor: 'rgba(253,180,92,0.2)',
strokeColor: 'rgba(253,180,92,1)',
pointColor: 'rgba(253,180,92,1)',
pointStrokeColor: '#fff',
pointHighlightFill: '#fff',
pointHighlightStroke: 'rgba(253,180,92,0.8)',
color: 'rgba(253,180,92,1)',
highlight: 'rgba(253,180,92,0.8)'
}, {
fillColor: 'rgba(148,159,177,0.2)',
strokeColor: 'rgba(148,159,177,1)',
pointColor: 'rgba(148,159,177,1)',
pointStrokeColor: '#fff',
pointHighlightFill: '#fff',
pointHighlightStroke: 'rgba(148,159,177,0.8)',
color: 'rgba(148,159,177,1)',
highlight: 'rgba(148,159,177,0.8)'
}, {
fillColor: 'rgba(77,83,96,0.2)',
strokeColor: 'rgba(77,83,96,1)',
pointColor: 'rgba(77,83,96,1)',
pointStrokeColor: '#fff',
pointHighlightFill: '#fff',
pointHighlightStroke: 'rgba(77,83,96,0.8)',
color: 'rgba(77,83,96,1)',
highlight: 'rgba(77,83,96,0.8)'
}];
constructor(private element:ElementRef) {
}
ngOnInit() {
this.ctx = this.element.nativeElement.children[0].getContext('2d');
this.cvs = this.element.nativeElement.children[0];
this.parent = this.element.nativeElement;
this.refresh();
this.initFlag = true;
}
ngOnDestroy() {
if (this.chart) {
this.chart.destroy();
this.chart = null;
}
if (this.legendTemplate) {
this.legendTemplate.destroy();
this.legendTemplate = null;
}
}
private get data() {
return this._data;
}
private set data(value) {
this._data = value;
if (this.initFlag && this._data && this._data.length > 0) {
this.refresh();
}
}
private get chartType() {
return this._chartType;
}
private set chartType(value) {
this._chartType = value;
if (this.initFlag && this._chartType && this._chartType.length > 0) {
this.refresh();
}
}
setLegend() {
let list = this.parent.getElementsByTagName('ul');
if (list.length) {
list[0].remove();
this.parent.insertAdjacentHTML('beforeend', this.chart.generateLegend());
} else {
this.parent.insertAdjacentHTML('beforeend', this.chart.generateLegend());
}
}
getColour(colour:Array<number>):any {
return {
fillColor: this.rgba(colour, 0.2),
strokeColor: this.rgba(colour, 1),
pointColor: this.rgba(colour, 1),
pointStrokeColor: '#fff',
pointHighlightFill: '#fff',
pointHighlightStroke: this.rgba(colour, 0.8),
color: this.rgba(colour, 1),
highlight: this.rgba(colour, 0.8)
};
}
getRandomInt(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
}
rgba(colour, alpha) {
return 'rgba(' + colour.concat(alpha).join(',') + ')';
}
public click(evt) {
let atEvent = this.chart.getPointsAtEvent || this.chart.getBarsAtEvent || this.chart.getSegmentsAtEvent;
let activePoints = atEvent.call(this.chart, evt);
if (activePoints.length > 0) {
let activeLabel = activePoints[0].label;
this.chartClick.emit({activePoints: activePoints, activeLabel: activeLabel});
} else {
console.log('not point');
}
}
public hover(evt) {
console.log(evt);
let atEvent = this.chart.getPointsAtEvent || this.chart.getBarsAtEvent || this.chart.getSegmentsAtEvent;
console.log(atEvent);
let activePoints = atEvent.call(this.chart, evt);
if (activePoints.length > 0) {
let activeLabel = activePoints[0].label;
let activePoint = activePoints[0].value;
this.chartHover.emit({activePoints: activePoints, activePoint: activePoint, activeLabel: activeLabel});
} else {
console.log('not point');
}
}
getChartBuilder(ctx:any, data:Array<any>, options:any) {
return new Chart(ctx)[this.chartType](data, options);
}
getDataObject(label:string, value:any):any {
if (this.chartType === 'Line'
|| this.chartType === 'Bar'
|| this.chartType === 'Radar') {
return {
label: label,
data: value
};
}
if (this.chartType === 'Pie'
|| this.chartType === 'Doughnut'
|| this.chartType === 'PolarArea') {
return {
label: label,
value: value
};
}
return null;
}
getChartData(labels:any, dataObject:any) {
if (this.chartType === 'Line'
|| this.chartType === 'Bar'
|| this.chartType === 'Radar') {
return {
labels: labels,
datasets: dataObject
};
}
if (this.chartType === 'Pie'
|| this.chartType === 'Doughnut'
|| this.chartType === 'PolarArea') {
return dataObject;
}
}
private refresh() {
this.ngOnDestroy();
let dataset:Array<any> = [];
for (let i = 0; i < this.data.length; i++) {
let colourDesc:Array<number> = [this.getRandomInt(0, 255), this.getRandomInt(0, 255), this.getRandomInt(0, 255)];
let colour = i < this.colours.length ? this.colours[i] : this.defaultsColours[i] || this.getColour(colourDesc);
let data:any = (<any>Object).assign(colour,
this.getDataObject(this.series[i] || this.labels[i], this.data[i]));
dataset.push(data);
}
let data:any = this.getChartData(this.labels, dataset);
this.chart = this.getChartBuilder(this.ctx, data, this.options);
if (this.legend) {
this.setLegend();
}
}
}
export const CHART_DIRECTIVES:Array<any> = [Charts, BaseChart];
导入{
组件、视图、,
指令、AfterViewChecked、OnDestroy、OnInit、,
EventEmitter,ElementRef,输入
}来自“angular2/核心”;
从'angular2/common'导入{CORE_指令、FORM_指令、NgClass};
申报var图表:有;
@组成部分({
选择器:“图表,画布[图表]”,
模板:``,
指令:[核心指令,NgClass]
})
导出类图表{
构造函数(元素:ElementRef){
}
}
@组成部分({
选择器:'基础图表',
特性:[
"数据",,
“标签”,
“系列”,
“颜色”,
“图表类型”,
“传奇”,
“选项”
],
输入:['chartClick','chartHover'],
模板:`
`,
指令:[核心指令,形式指令,NgClass]
})
导出类BaseChart实现OnInit、OnDestroy{
私人ctx:任何;
私人简历:任何;
私人家长:任何;
私人海图:任何;
私有数据:数组。我无法向自己解释的是,我或多或少有着相同的行为:图表显示得很好,但如果我点击它,我就有了
未捕获异常:计算“单击”时出错
原始异常:TypeError:this.chart.getPointsAtEvent不是函数
同样,当我查看priming中的代码时(在node\u modules/priming/components/chart/linechart/linechart.js
),有var-activePoints=this.chart.getPointsAtEvent(event);
和getPointsAtEvent(event)
似乎没有定义任何地方
我是不是遗漏了什么?我真的不知道怎么解释这一切
非常感谢您的帮助!:)我遇到了与您相同的问题。当页面加载时,没有显示任何内容,当我将鼠标悬停在图形应为的区域时,控制台中充满了错误。
对我来说,解决这个问题的办法是:
.chart{显示:块;宽度:100%;}
在
希望这有帮助。对不起,我误解了代码。问题是这个.chart
没有任何函数getPointsAtEvent
,getBarsAtEvent
或getSegmentsAtEvent
。可能这个。chart
根本不是一个图表。你可能是对的,我已经更新了我的第一篇帖子,添加了如果你想看一看的话,请把整个charts.ts
文件放在最后。如果,恐怕是这样,this.chart
结果根本不是一个图表,我不确定我能做些什么来修复我的错误,我想……我已经用新信息更新了我的原始帖子,你能看一下吗?我真的很想感谢!:)我建议添加charts.js d.ts文件->如果你使用打字,它可以自动从github获取If。你也可以将其发布到PrimeNG论坛,以便我们的团队可以在那里提供帮助吗?我不太理解Cagatay,我需要确切地添加chart.d.ts文件到哪里?只是为了确定,是那个吗?还有,当我尝试的时候g要使用打字(我第一次尝试),我有打字错误!消息无法解析“https://github.com/DefinitelyTyped/DefinitelyTyped.git“打字错误!由意外标记引起”这也解决了我尝试对Ionic 2执行相同操作时的问题。非常感谢