Demos
Grid(Angular)
Filtering / Searching
Excel-like Filter
Custom Filter Operators

Custom Filter Operators (Angular)

The FlexGridFilter class is localizable, and you can take advantage of that not only to customize the strings displayed in the UI, but also which filter conditions to show for each data type.

In this example, we customized the list of operators by assigning custom arrays to the filter's stringOperators, numberOperators, dateOperators, and booleanOperators. Open the filter drop-downs to see the effect.

Learn about FlexGrid | Custom Filter Operators Documentation | 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 { WjGridModule } from '@mescius/wijmo.angular2.grid';
import { WjGridFilterModule } from '@mescius/wijmo.angular2.grid.filter';
import * as wjcCore from '@mescius/wijmo';
import * as wjcGridFilter from '@mescius/wijmo.grid.filter';

@Component({
  standalone: true,
  imports: [WjGridModule, WjGridFilterModule, BrowserModule],
  selector: 'app-component',
  templateUrl: 'src/app.component.html',
})
export class AppComponent {
  data: any[];

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

  @ViewChild('filter', { static: true }) filter: wjcGridFilter.FlexGridFilter;

  private _customizeFilterConditions() {
    // customize the FlexGridFilter conditions
    let filter = wjcCore.culture.FlexGridFilter,
      Operator = wjcGridFilter.Operator;
    filter.stringOperators = [
      { name: "(doesn't matter)", op: null },
      { name: 'Is', op: Operator.EQ },
      { name: 'Is not', op: Operator.NE },
      { name: 'Is bigger than', op: Operator.GT }, // added
      { name: 'Is smaller than', op: Operator.LT }, // added
    ];
    filter.numberOperators = [
      { name: "(doesn't matter)", op: null },
      { name: 'Is', op: Operator.EQ },
      { name: 'Is not', op: Operator.NE },
      { name: 'Is bigger than', op: Operator.GT },
      { name: 'Is smaller than', op: Operator.LT },
    ];
    filter.dateOperators = [
      { name: "(doesn't matter)", op: null },
      { name: 'Is', op: Operator.EQ },
      { name: 'Is earlier than', op: Operator.LT },
      { name: 'Is later than', op: Operator.GT },
    ];
    filter.booleanOperators = [
      { name: '(not set)', op: null },
      { name: 'Is', op: Operator.EQ },
      { name: 'Is not', op: Operator.NE },
    ];
  }

  private _getData() {
    // create some random data
    let countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','),
      data = [];
    for (let i = 0; i < 200; i++) {
      data.push({
        id: i,
        country: countries[i % countries.length],
        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 { WjGridModule } from '@mescius/wijmo.angular2.grid'; import { WjGridFilterModule } from '@mescius/wijmo.angular2.grid.filter'; import * as wjcCore from '@mescius/wijmo'; import * as wjcGridFilter from '@mescius/wijmo.grid.filter'; @Component({ standalone: true, imports: [WjGridModule, WjGridFilterModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html', }) export class AppComponent { data: any[]; constructor() { this.data = this._getData(); this._customizeFilterConditions(); } @ViewChild('filter', { static: true }) filter: wjcGridFilter.FlexGridFilter; private _customizeFilterConditions() { // customize the FlexGridFilter conditions let filter = wjcCore.culture.FlexGridFilter, Operator = wjcGridFilter.Operator; filter.stringOperators = [ { name: "(doesn't matter)", op: null }, { name: 'Is', op: Operator.EQ }, { name: 'Is not', op: Operator.NE }, { name: 'Is bigger than', op: Operator.GT }, // added { name: 'Is smaller than', op: Operator.LT }, // added ]; filter.numberOperators = [ { name: "(doesn't matter)", op: null }, { name: 'Is', op: Operator.EQ }, { name: 'Is not', op: Operator.NE }, { name: 'Is bigger than', op: Operator.GT }, { name: 'Is smaller than', op: Operator.LT }, ]; filter.dateOperators = [ { name: "(doesn't matter)", op: null }, { name: 'Is', op: Operator.EQ }, { name: 'Is earlier than', op: Operator.LT }, { name: 'Is later than', op: Operator.GT }, ]; filter.booleanOperators = [ { name: '(not set)', op: null }, { name: 'Is', op: Operator.EQ }, { name: 'Is not', op: Operator.NE }, ]; } private _getData() { // create some random data let countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), data = []; for (let i = 0; i < 200; i++) { data.push({ id: i, country: countries[i % countries.length], 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 Custom Filter Operators</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"> <!-- the grid --> <wj-flex-grid #flex [(itemsSource)]="data"> <wj-flex-grid-filter #filter [defaultFilterType]="'Condition'"></wj-flex-grid-filter> </wj-flex-grid> </div>
.wj-flexgrid { max-height: 250px; margin:10px 0; } body { margin-bottom: 20px; }
(function (global) { SystemJS.config({ transpiler: './plugin-typescript.js', typescriptOptions: { "target": "ES2022", "module": "system", "emitDecoratorMetadata": true, "experimentalDecorators": true, }, baseURL: 'node_modules/', meta: { 'typescript': { "exports": "ts" }, '*.css': { loader: 'systemjs-plugin-css' }, '*.mjs': { format: 'esm' }, }, paths: { // paths serve as alias 'npm:': '' }, packageConfigPaths: [ '/node_modules/*/package.json', "/node_modules/@angular/*/package.json", "/node_modules/@mescius/*/package.json" ], map: { 'core-js': 'https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js', 'typescript': 'https://cdnjs.cloudflare.com/ajax/libs/typescript/5.2.2/typescript.min.js', "rxjs": "https://cdnjs.cloudflare.com/ajax/libs/rxjs/7.8.1/rxjs.umd.min.js", 'systemjs-plugin-css': 'https://cdn.jsdelivr.net/npm/systemjs-plugin-css@0.1.37/css.js', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 'npm:@mescius/wijmo.chart.finance.analytics/index.js', '@mescius/wijmo.chart.hierarchical': 'npm:@mescius/wijmo.chart.hierarchical/index.js', '@mescius/wijmo.chart.interaction': 'npm:@mescius/wijmo.chart.interaction/index.js', '@mescius/wijmo.chart.radar': 'npm:@mescius/wijmo.chart.radar/index.js', '@mescius/wijmo.chart.render': 'npm:@mescius/wijmo.chart.render/index.js', '@mescius/wijmo.chart.webgl': 'npm:@mescius/wijmo.chart.webgl/index.js', 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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);