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Drag and Drop in Angular ListBox component

15 Jun 2021 / 3 minutes to read

The ListBox has support to drag an item or a group of selected items and drop it within the same list box or into another list box.

The elements can be customized on drag and drop by using the following events,

Events Description
dragStart Triggers when the selected element is being dragged.
drag Triggers when the selected element is being dragged.
drop Triggers when the selected element is being dropped.

Single listbox

To drag and drop an item or group of item within the list box can be achieved by setting allowDragAndDrop property as true.

The following sample illustrates how to drag and drop an item within the same list box by enabling allowDragAndDrop property.

Source
Preview
app.component.ts
app.module.ts
main.ts
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import { Component } from '@angular/core';

@Component ({
    selector: 'app-container',
    template: `<ejs-listbox [dataSource]="data" [allowDragAndDrop]="true" [fields]="setfield"><ejs-listbox>`
})

export class AppComponent {
   public data: {[key: string]: Object}[] = [
    { "Name": "Australia", "Code": "AU" },
    { "Name": "Bermuda", "Code": "BM" },
    { "Name": "Canada", "Code": "CA" },
    { "Name": "Cameroon", "Code": "CM" },
    { "Name": "Denmark", "Code": "DK" },
    { "Name": "France", "Code": "FR" },
    { "Name": "Finland", "Code": "FI" },
    { "Name": "Germany", "Code": "DE" },
    { "Name": "Hong Kong", "Code": "HK" }
   ];
   public setfield = { text : "Name" }
}
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { ListBoxComponent } from '@syncfusion/ej2-angular-dropdowns';
import { ButtonComponent } from '@syncfusion/ej2-angular-buttons';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,FormsModule, ReactiveFormsModule
    ],
    declarations: [AppComponent, ListBoxComponent, ButtonComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
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import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Multiple listbox

To drag and drop an item or group of item between two list boxes can be achieved by setting allowDragAndDrop property as true and scope property should be set to both the list boxes.

In the following sample, the allowDragAndDrop property is set as true and scope is set as combined-list to enable drop and drop in both list boxes.

Source
Preview
app.component.ts
app.module.ts
main.ts
draganddrop.css
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import { Component } from '@angular/core';

@Component({
    selector: 'app-container',
    template: `<div class="drag-drop-wrapper">
                     <div class="listbox-control1">
                     <h4>Group A</h4>
                     <ejs-listbox [dataSource]="groupA" [allowDragAndDrop]="true" [fields]="setfield" scope="combined-list" height="290px"></ejs-listbox>
                     </div>
                     <div class="listbox-control2">
                     <h4>Group B</h4>
                     <ejs-listbox [dataSource]="groupB" [allowDragAndDrop]="true" [fields]="setfield" scope="combined-list" height="290px"></ejs-listbox>
                     </div></div>`,
    styleUrls: ['draganddrop.css'],
})

export class AppComponent {
public groupA: { [key: string]: Object }[] = [
    { "Name": "Australia", "Code": "AU" },
    { "Name": "Bermuda", "Code": "BM" },
    { "Name": "Canada", "Code": "CA" },
    { "Name": "Cameroon", "Code": "CM" },
    { "Name": "Denmark", "Code": "DK" },
    { "Name": "France", "Code": "FR" },
    { "Name": "Finland", "Code": "FI" },
    { "Name": "Germany", "Code": "DE" },
    { "Name": "Hong Kong", "Code": "HK" }
];

public groupB: { [key: string]: Object }[] = [
    { "Name": "India", "Code": "IN" },
    { "Name": "Italy", "Code": "IT" },
    { "Name": "Japan", "Code": "JP" },
    { "Name": "Mexico", "Code": "MX" },
    { "Name": "Norway", "Code": "NO" },
    { "Name": "Poland", "Code": "PL" },
    { "Name": "Switzerland", "Code": "CH" },
    { "Name": "United Kingdom", "Code": "GB" },
    { "Name": "United States", "Code": "US" }
];
public setfield = { text: "Name" }
}
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { ListBoxComponent } from '@syncfusion/ej2-angular-dropdowns';
import { ButtonComponent } from '@syncfusion/ej2-angular-buttons';
/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,FormsModule, ReactiveFormsModule
    ],
    declarations: [AppComponent, ListBoxComponent, ButtonComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
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import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
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#container {
    visibility: hidden;
}

#loader {
  color: #008cff;
  height: 40px;
  width: 30%;
  position: absolute;
  top: 45%;
  left: 45%;
}

.listbox-control1,
.listbox-control2 {
    width: 48%;
}
.listbox-control1 {
  float: left;
}

.listbox-control2 {
  float: right;
}