Demos
Grid(Angular)
Events
Drag and Drop

Dragging Rows from the FlexGrid (Angular)

You can use the HTML5 drag/drop API to implement row dragging from, into, or between FlexGrid controls. This simple example shows how you can drag rows from the grid into arbitrary elements. You can easily extend this to support move operations (by removing the row from the source grid when the operation is completed) or dropping into grids (by detecting the drop position and inserting new rows into the target grid).

Learn about FlexGrid | FlexGrid API Reference

This example uses Angular.

JavaScript
Angular
Vue
React
app.component.ts
index.html
app.component.html
styles.css
Copy to CodeMine
import 'bootstrap.css';
import '@mescius/wijmo.styles/wijmo.css';
import './styles.css';
//
import '@angular/compiler';
import { Component, enableProdMode, ViewChild, ɵresolveComponentResources } from '@angular/core';

import { BrowserModule, bootstrapApplication } from '@angular/platform-browser';
import * as wjcGrid from '@mescius/wijmo.grid';
import { WjGridModule } from '@mescius/wijmo.angular2.grid';
//
@Component({
  standalone: true,
  imports: [WjGridModule, BrowserModule],
  selector: 'app-component',
  templateUrl: 'src/app.component.html',
})
export class AppComponent {
  data: any[];
  private _theColumn: string;

  constructor() {
    this.data = this._getData();
  }

  @ViewChild('flex', { static: true }) flex: wjcGrid.FlexGrid;

  ngAfterViewInit() {
    this._makeDragSource(this.flex);
    this._makeDropTarget(document.querySelector('#theTarget'));
  }

  // make grid rows draggable
  private _makeDragSource(s: wjcGrid.FlexGrid) {
    // make rows draggable
    s.itemFormatter = (panel: wjcGrid.GridPanel, r: number, c: number, cell: HTMLElement) => {
      if (panel.cellType == wjcGrid.CellType.RowHeader) {
        cell.textContent = (r + 1).toString();
        cell.draggable = true;
      }
    };
    // disable built-in row drag/drop
    s.addEventListener(
      s.hostElement,
      'mousedown',
      (e: MouseEvent) => {
        if (s.hitTest(e).cellType == wjcGrid.CellType.RowHeader) {
          e.stopPropagation();
        }
      },
      true,
    );
    // handle drag start
    s.addEventListener(
      s.hostElement,
      'dragstart',
      (e: DragEvent) => {
        let ht = s.hitTest(e);
        if (ht.cellType == wjcGrid.CellType.RowHeader) {
          s.select(new wjcGrid.CellRange(ht.row, 0, ht.row, s.columns.length - 1));
          e.dataTransfer.effectAllowed = 'copy';
          e.dataTransfer.setData('text', ht.row.toString());
        }
      },
      true,
    );
  }

  // enable drop operations on an element
  private _makeDropTarget(s: HTMLElement) {
    s.addEventListener('dragover', (e: DragEvent) => {
      let dragRow = e.dataTransfer.getData('text');
      if (dragRow != null) {
        e.dataTransfer.dropEffect = 'copy';
        e.preventDefault();
      }
    });
    s.addEventListener('drop', (e: DragEvent) => {
      let dragRow = e.dataTransfer.getData('text');
      if (dragRow != null) {
        let item = this.flex.rows[parseInt(dragRow)].dataItem;
        alert('thanks for dropping row ' + JSON.stringify(item) + ' here.');
        e.preventDefault();
      }
    });
  }

  private _getData() {
    // generate some random data
    let countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','),
      data = [];
    for (let i = 0; i < countries.length; i++) {
      data.push({
        country: countries[i],
        downloads: Math.round(Math.random() * 20000),
        sales: Math.random() * 10000,
        expenses: Math.random() * 5000,
      });
    }
    return data;
  }
}
//

//
enableProdMode();

// Resolve resources (templateUrl, styleUrls etc), After resolution all URLs have been converted into `template` strings.
ɵresolveComponentResources(fetch).then(() => {
  // Bootstrap application
  bootstrapApplication(AppComponent).catch((err) => console.error(err));
});
import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; // import '@angular/compiler'; import { Component, enableProdMode, ViewChild, ɵresolveComponentResources } from '@angular/core'; import { BrowserModule, bootstrapApplication } from '@angular/platform-browser'; import * as wjcGrid from '@mescius/wijmo.grid'; import { WjGridModule } from '@mescius/wijmo.angular2.grid'; // @Component({ standalone: true, imports: [WjGridModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html', }) export class AppComponent { data: any[]; private _theColumn: string; constructor() { this.data = this._getData(); } @ViewChild('flex', { static: true }) flex: wjcGrid.FlexGrid; ngAfterViewInit() { this._makeDragSource(this.flex); this._makeDropTarget(document.querySelector('#theTarget')); } // make grid rows draggable private _makeDragSource(s: wjcGrid.FlexGrid) { // make rows draggable s.itemFormatter = (panel: wjcGrid.GridPanel, r: number, c: number, cell: HTMLElement) => { if (panel.cellType == wjcGrid.CellType.RowHeader) { cell.textContent = (r + 1).toString(); cell.draggable = true; } }; // disable built-in row drag/drop s.addEventListener( s.hostElement, 'mousedown', (e: MouseEvent) => { if (s.hitTest(e).cellType == wjcGrid.CellType.RowHeader) { e.stopPropagation(); } }, true, ); // handle drag start s.addEventListener( s.hostElement, 'dragstart', (e: DragEvent) => { let ht = s.hitTest(e); if (ht.cellType == wjcGrid.CellType.RowHeader) { s.select(new wjcGrid.CellRange(ht.row, 0, ht.row, s.columns.length - 1)); e.dataTransfer.effectAllowed = 'copy'; e.dataTransfer.setData('text', ht.row.toString()); } }, true, ); } // enable drop operations on an element private _makeDropTarget(s: HTMLElement) { s.addEventListener('dragover', (e: DragEvent) => { let dragRow = e.dataTransfer.getData('text'); if (dragRow != null) { e.dataTransfer.dropEffect = 'copy'; e.preventDefault(); } }); s.addEventListener('drop', (e: DragEvent) => { let dragRow = e.dataTransfer.getData('text'); if (dragRow != null) { let item = this.flex.rows[parseInt(dragRow)].dataItem; alert('thanks for dropping row ' + JSON.stringify(item) + ' here.'); e.preventDefault(); } }); } private _getData() { // generate some random data let countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), data = []; for (let i = 0; i < countries.length; i++) { data.push({ country: countries[i], downloads: Math.round(Math.random() * 20000), sales: Math.random() * 10000, expenses: Math.random() * 5000, }); } return data; } } // // enableProdMode(); // Resolve resources (templateUrl, styleUrls etc), After resolution all URLs have been converted into `template` strings. ɵresolveComponentResources(fetch).then(() => { // Bootstrap application bootstrapApplication(AppComponent).catch((err) => console.error(err)); });
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexGrid Drag and Drop Events</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- Polyfills --> <script src="node_modules/core-js/client/shim.min.js"></script> <script src="node_modules/zone.js/fesm2015/zone.min.js"></script> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> // workaround to load 'rxjs/operators' from the rxjs bundle System.import('rxjs').then(function (m) { System.set(SystemJS.resolveSync('rxjs/operators'), System.newModule(m.operators)); System.import('./src/app.component'); }); </script> </head> <body> <app-component></app-component> </body> </html>
<div class="container-fluid"> <p> Drag rows from the grid by the row header:</p> <!-- the grid --> <wj-flex-grid #flex [(itemsSource)]="data"> </wj-flex-grid> <p> And drop them here:</p> <div id="theTarget" style="height:100px;background-color:#e0e0e0;padding:6px;border-radius:2px;"> Drop rows here... </div> </div>
.wj-flexgrid { max-height: 250px; margin-bottom: 12px; } body { margin-bottom: 24pt; }
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'npm:@angular/forms/fesm2022/forms.mjs', }, // packages tells the System loader how to load when no filename and/or no extension packages: { "./src": { defaultExtension: 'ts' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);