我通过选择预先存在的组件创建了动态组件实例。例如,
@Component({
selector: 'dynamic-component',
template: `<div #container><ng-content></ng-content></div>`
})
export class DynamicComponent {
@ViewChild('container', {read: ViewContainerRef}) container: ViewContainerRef;
public addComponent(ngItem: Type<WidgetComponent>,selectedPlugin:Plugin): WidgetComponent {
let factory = this.compFactoryResolver.resolveComponentFactory(ngItem);
const ref = this.container.createComponent(factory);
const newItem: WidgetComponent = ref.instance;
newItem.pluginId = Math.random() + '';
newItem.plugin = selectedPlugin;
this._elements.push(newItem);
return newItem;
}
}
我先前存在的组件是ChartWidget和Disteragetwidget,它扩展了我想在容器中添加的类WidgetComponent。例如,
@Component({
selector: 'chart-widget',
templateUrl: 'chart-widget.component.html',
providers: [{provide: WidgetComponent, useExisting: forwardRef(() => ChartWidget) }]
})
export class ChartWidget extends WidgetComponent implements OnInit {
constructor(ngEl: ElementRef, renderer: Renderer) {
super(ngEl, renderer);
}
ngOnInit() {}
close(){
console.log('close');
}
refresh(){
console.log('refresh');
}
...
}
Chart-Widget.compoment.html(使用Primeng面板(
<p-panel [style]="{'margin-bottom':'20px'}">
<p-header>
<div class="ui-helper-clearfix">
<span class="ui-panel-title" style="font-size:14px;display:inline-block;margin-top:2px">Chart Widget</span>
<div class="ui-toolbar-group-right">
<button pButton type="button" icon="fa-window-minimize" (click)="minimize()"</button>
<button pButton type="button" icon="fa-refresh" (click)="refresh()"></button>
<button pButton type="button" icon="fa-expand" (click)="expand()" ></button>
<button pButton type="button" (click)="close()" icon="fa-window-close"></button>
</div>
</div>
</p-header>
some data
</p-panel>
data-widget.compoment.html(与Primeng面板相同(
@Component({
selector: 'data-widget',
templateUrl: 'data-widget.component.html',
providers: [{provide: WidgetComponent, useExisting: forwardRef(() =>DataWidget) }]
})
export class DataWidget extends WidgetComponent implements OnInit {
constructor(ngEl: ElementRef, renderer: Renderer) {
super(ngEl, renderer);
}
ngOnInit() {}
close(){
console.log('close');
}
refresh(){
console.log('refresh');
}
...
}
widgetcomponent.ts
@Component({
selector: 'widget',
template: '<ng-content></ng-content>'
})
export class WidgetComponent{
}
现在,我通过以下方式从存在的组件(例如Chart-Widget和Data-Widget(中选择一个组件来添加组件,并将这些实例存储到数组中。
@Component({
templateUrl: 'main.component.html',
entryComponents: [ChartWidget, DataWidget],
})
export class MainComponent implements OnInit {
private elements: Array<WidgetComponent>=[];
private WidgetClasses = {
'ChartWidget': ChartWidget,
'DataWidget': DataWidget
}
@ViewChild(DynamicComponent) dynamicComponent: DynamicComponent;
addComponent(): void{
let ref= this.dynamicComponent.addComponent(this.WidgetClasses[this.selectedComponent], this.selectedComponent);
this.elements.push(ref);
this.dynamicComponent.resetContainer();
}
}
现在,我面临的问题是在main.component.html中使用innerhtml渲染组件。它呈现HTML,但我无法使用按钮点击事件或其他事件。我还尝试使用Primeng渲染图表,但它也无法正常工作。
main.component.html
<dynamic-component [hidden]="true" ></dynamic-component>
<widget *ngFor="let item of elements">
<div [innerHTML]="item._ngEl.nativeElement.innerHTML | sanitizeHtml">
</div>
</widget>
我还实施了SanitizeHTML管道,但其结果仍然相同。因此,据我了解,InnerHTML仅显示HTML数据,但我无法使用任何按钮事件以及JS图表。我还试图在标签下显示这样的项目{{item}}。但是它像文本[对象对象]一样显示。那么,有人可以为此提供解决方案吗?如何渲染允许按钮事件和JS图表的组件?谢谢。
编辑:请参阅我的plunker https://plnkr.co/edit/lugu2ppssbd3xhphiup1?p=peview您可以在这里看到,可以动态添加图表或数据窗口小部件,并且我正在使用InnerHTML进行显示。因此,按钮事件在这里不起作用。如果我像{{item}}一样编码,则显示[对象]文本。您还可以在控制台中查看组件数组数据。主要问题是,如何激活其上的按钮事件(例如,如果我单击关闭或刷新按钮,则它将调用相关功能(?
我会创建结构指令,例如:
view.directive.ts
import { ViewRef, Directive, Input, ViewContainerRef } from '@angular/core';
@Directive({
selector: '[view]'
})
export class ViewDirective {
constructor(private vcRef: ViewContainerRef) {}
@Input()
set view(view: ViewRef) {
this.vcRef.clear();
this.vcRef.insert(view);
}
ngOnDestroy() {
this.vcRef.clear()
}
}
然后
app.component.ts
private elements: Array<{ view: ViewRef, component: WidgetComponent}> = [];
...
addComponent(widget: string ): void{
let component = this.dynamicComponent.addComponent(this.WidgetClasses[widget]);
let view: ViewRef = this.dynamicComponent.container.detach(0);
this.elements.push({view,component});
this.dynamicComponent.resetContainer();
}
和
app.component.html
<widget *ngFor="let item of elements">
<ng-container *view="item.view"></ng-container>
</widget>
所以我刚刚将视图从动态组件容器移动到所需的位置。
plunker示例