Customize listview with dynamic tags in Angular Listview component

27 Sep 202310 minutes to read

You can customize the ListView items using the template property. Here, the dynamic tags are added and removed in the list item from another ListView. Refer to the following steps to achieve this.

• Initialize dynamic ListView with required property that holds the tags of parent ListView, and bind the select event (triggers when the list item is selected), in which you can get and add the selected item value as tags into parent ListView. Refer to the following code sample.

    //Select the event that is is rendered inside dialog for ListView
    addTag(e) {
        let listTag = document.createElement('span');
        listTag.className = 'advanced-option';
        let labelElem = document.createElement('span');
        labelElem.className = 'label';
        let deleteElem = document.createElement('span');
        deleteElem.className = 'delete';
        deleteElem.onclick = this.removeTag;
        labelElem.innerHTML = e.text;
        listTag.appendChild(labelElem);
        listTag.appendChild(deleteElem);
        let tag = document.createElement('span');
        tag.className = 'advanced-option-list';
        tag.appendChild(listTag);
        this.listviewInstance.element.querySelector('.e-active').appendChild(tag);
    }

• Render the dialog component with empty content and append the created dynamic ListView object to the dialog on created event.

• Bind the click event for button icon (+) to update the ListView data source with tags, and open the dialog with this dynamic ListView. Refer to the following code sample.

    //Method to hide/show the dialog and update the ListView data source
    renderDialog(id) {
        if (document.getElementsByClassName('e-popup-open').length != 0) {
            this.dialog.hide();
        }
        else {
            this.listObj.dataSource = this.datasource[id];
            this.listObj.dataBind();
            this.dialog.show();
        }
  
    }

• Bind the click event with added dynamic tags to remove it. Refer to the following code sample.

  ```typescript

  //Method to remove the list item
  removeTag() {
  this.parentNode.parentNode.remove();
  }

```

app.component.ts

import { Component, ViewChild } from '@angular/core';
import{ListViewComponent} from "@syncfusion/ej2-angular-lists";
import{DialogComponent} from "@syncfusion/ej2-angular-popups";
@Component({
    selector: 'my-app',
    template: `<div id="sample">
    <ejs-listview #list id='templatelist' [dataSource]='data' [fields]='fields' width=350 >
    <ng-template  #template let-data="">
    <div><span class="templatetext"> </span> <span class="designationstyle"><button ejs-button id="" class="e-but" iconCss='e-icons e-add-icon' cssClass='e-small e-round' (click)='onClick($event)'></button></span></div>
    </ng-template>
    </ejs-listview>
   <ejs-dialog id='dialog' #ejDialog width='200px' [animationSettings]='animation' [visible]='false' showCloseIcon='true' [position]='position'>
      <ng-template #content>
        <ejs-listview #List id="list" showHeader=true headerTitle='Favorite' width='200px' [dataSource]='datasource.Brooke' [fields]='fields' (select)='addTag($event)'></ejs-listview>
      </ng-template>
      </ejs-dialog>
    </div>`
})

export class AppComponent {
    @ViewChild('list') listViewInstance?: ListViewComponent;
    @ViewChild('List') listObj?: ListViewComponent;
    @ViewChild('ejDialog') dialog?: DialogComponent;
    //define the array of string
public data: Object[] =  [{ "Id": "Brooke", "Name": "Brooke" },
{ "Id": "Claire", "Name": "Claire" },
{ "Id": "Erik", "Name": "Erik" },
{ "Id": "Grace", "Name": "Grace" },
{ "Id": "Jacob", "Name": "Jacob" }] as Object[];

public fields: Object = {text: "Name"};
public position?: Object;
public animation: Object = {effect: 'None'};
public parentNode?:HTMLElement;

public brookeTag : Object = [{ "id": "list11", "Name": "Discover Music" },
{ "id": "list12", "Name": "Sales and Events" },
{ "id": "list13", "Name": "Categories" },
{ "id": "list14", "Name": "MP3 Albums" },
{ "id": "list15", "Name": "More in Music" },
];

public claireTag : Object = [{ "id": "list21", "Name": "Songs" },
{ "id": "list22", "Name": "Bestselling Albums" },
{ "id": "list23", "Name": "New Releases" },
{ "id": "list24", "Name": "Bestselling Songs" },
];

public erikTag : Object = [{ "id": "list31", "Name": "Artwork" },
{ "id": "list32", "Name": "Abstract" },
{ "id": "list33", "Name": "Acrylic Mediums" },
{ "id": "list34", "Name": "Creative Acrylic" },
{ "id": "list35", "Name": "Canvas Art" }
];

public graceTag : Object = [{ "id": "list41", "Name": "Rock" },
{ "id": "list42", "Name": "Gospel" },
{ "id": "list43", "Name": "Latin Music" },
{ "id": "list44", "Name": "Jazz" },
];

public jacobTag: Object = [{ "id": "list51", "Name": "100 Albums" },
{ "id": "list52", "Name": "Hip-Hop and R&B Sale" },
{ "id": "list53", "Name": "CD Deals" }
];

public datasource: any = { "Brooke": this.brookeTag, "Claire": this.claireTag, "Erik": this.erikTag, "Grace": this.graceTag, "Jacob": this.jacobTag };

ngAfterViewChecked(){
setTimeout(()=>{
  this.position =  { X: (document.querySelector('.e-add-icon') as HTMLElement | any).getBoundingClientRect().left + 50, Y: (document.querySelector('.e-add-icon') as any).getBoundingClientRect().top - 5 };
},1000);
}
onClick(e: any){
  this.renderDialog(e.currentTarget.id);
}
renderDialog(id: string | number) {
    if (document.getElementsByClassName('e-popup-open').length != 0) {
        (this.dialog as DialogComponent).hide();
    }
    else {
        (this.listObj as ListViewComponent).dataSource = this.datasource[id];
        this.listObj?.dataBind();
        (this.dialog as DialogComponent).show();
    }

}
addTag(e: any) {
    let listTag = document.createElement('span');
    listTag.className = 'advanced-option';
    let labelElem = document.createElement('span');
    labelElem.className = 'label';
    let deleteElem = document.createElement('span');
    deleteElem.className = 'delete';
    deleteElem.onclick = this.removeTag;
    labelElem.innerHTML = e.text;
    listTag.appendChild(labelElem);
    listTag.appendChild(deleteElem);
    let tag = document.createElement('span');
    tag.className = 'advanced-option-list';
    tag.appendChild(listTag);
    (this.listViewInstance?.element.querySelector('.e-active') as any).appendChild(tag);
}
removeTag() {
    (this.parentNode as HTMLElement).remove();
}
}

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { ListViewModule } from '@syncfusion/ej2-angular-lists';
import { DialogModule } from '@syncfusion/ej2-angular-popups';
import { ButtonModule } from '@syncfusion/ej2-angular-buttons';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        ListViewModule,
        DialogModule,
        ButtonModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }

main.ts

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

import 'zone.js';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);