React Select Box - Customize Drop-Down Button

import React, { useCallback, useMemo, useState } from 'react';

import SelectBox from 'devextreme-react/select-box';

import { Template } from 'devextreme-react/core/template';

import {

  products,

  simpleProducts,

  simpleProductLabel,

  deferredProductLabel,

  productLabel,

} from './data.js';

import ImageIcon from './imageIcon.js';

import IndicatorIcon from './indicatorIcon.js';

import ConditionalIcon from './conditionalIcon.js';

import Item from './item.js';

​

function App() {

  const [selectedItem, setSelectedItem] = useState(products[0]);

  const [isLoaded, setIsLoaded] = useState(true);

  const deferredProducts = useMemo(

    () => ({

      loadMode: 'raw',

      load: () => {

        setIsLoaded(false);

        const promise = new Promise((resolve) => {

          setTimeout(() => {

            resolve(simpleProducts);

            setIsLoaded(true);

          }, 3000);

        });

        return promise;

      },

    }),

    [setIsLoaded],

  );

  const renderLoadIndicator = useCallback(() => <IndicatorIcon isLoaded={isLoaded} />, [isLoaded]);

  const renderConditionalIcon = useCallback(

    () => <ConditionalIcon value={selectedItem} />,

    [selectedItem],

  );

  const selectionChanged = useCallback((event) => {

    setSelectedItem(event.selectedItem);

  }, []);

  return (

    <div className="dx-fieldset">

      <div className="dx-field">

        <div className="dx-field-label">Image as the icon</div>

        <div className="dx-field-value">

          <SelectBox

            dataSource={simpleProducts}

            inputAttr={simpleProductLabel}

            dropDownButtonRender={ImageIcon}

          />

        </div>

      </div>

      <div className="dx-field">

        <div className="dx-field-label">Load indicator as the icon</div>

        <div className="dx-field-value">

          <SelectBox

            dataSource={deferredProducts}

            inputAttr={deferredProductLabel}

            dropDownButtonTemplate="loadIndicator"

          >

            <Template

              name="loadIndicator"

              render={renderLoadIndicator}

            />

          </SelectBox>

        </div>

      </div>

      <div className="dx-field">

        <div className="dx-field-label">Value-dependent icon</div>

        <div className="dx-field-value">

          <SelectBox

            dataSource={products}

            defaultValue={products[0].ID}

            selectedItem={selectedItem}

            displayExpr="Name"

            inputAttr={productLabel}

            showClearButton={true}

            valueExpr="ID"

            itemRender={Item}

            dropDownButtonTemplate="conditionalIcon"

            onSelectionChanged={selectionChanged}

          >

            <Template

              name="conditionalIcon"

              render={renderConditionalIcon}

            />

          </SelectBox>

        </div>

      </div>

    </div>

  );

}

export default App;

​

import React from 'react';

​

interface ConditionalIconProps {

  value: any;

}

​

export default function ConditionalIcon({ value }: ConditionalIconProps) {

  if (value) {

    return (

      <img

        alt="Custom icon"

        src={`images/icons/${value.IconSrc}`}

        className="custom-icon"

      />

    );

  }

  return <div className="dx-dropdowneditor-icon"></div>;

}

​

import React from 'react';

​

export default function ImageIcon() {

  return (

    <img

      alt="Custom icon"

      src="images/icons/custom-dropbutton-icon.svg"

      className="custom-icon"

    />

  );

}

​

import React from 'react';

import LoadIndicator from 'devextreme-react/load-indicator';

​

interface IndicatorIconProps {

  isLoaded: any;

}

​

export default function IndicatorIcon({ isLoaded }: IndicatorIconProps) {

  return (

    <span>

      <LoadIndicator visible={!isLoaded} />

      <span hidden={!isLoaded}>

        <img

          alt="Custom icon"

          src="images/icons/custom-dropbutton-icon.svg"

          className="custom-icon"

        />

      </span>

    </span>

  );

}

​

import React from 'react';

​

export default function Item({ IconSrc, Name }) {

  return (

    <div className="custom-item">

      <img

        alt={Name}

        src={`images/icons/${IconSrc}`}

      />

      <div className="product-name">{Name}</div>

    </div>

  );

}

​

import React from 'react';

import ReactDOM from 'react-dom';

​

import App from './App.tsx';

​

ReactDOM.render(<App />, document.getElementById('app'));

​

export const simpleProducts = [

  'HD Video Player',

  'SuperHD Video Player',

  'SuperPlasma 50',

  'SuperLED 50',

  'SuperLED 42',

];

​

export const products = [{

  ID: 1,

  Name: 'HD Video Player',

  Price: 330,

  Current_Inventory: 225,

  Backorder: 0,

  Manufacturing: 10,

  Category: 'Video Players',

  IconSrc: 'video-player.svg',

}, {

  ID: 2,

  Name: 'SuperHD Player',

  Price: 400,

  Current_Inventory: 150,

  Backorder: 0,

  Manufacturing: 25,

  Category: 'Video Players',

  IconSrc: 'video-player.svg',

}, {

  ID: 3,

  Name: 'SuperPlasma 50',

  Price: 2400,

  Current_Inventory: 0,

  Backorder: 0,

  Manufacturing: 0,

  Category: 'Televisions',

  IconSrc: 'tv.svg',

}, {

  ID: 4,

  Name: 'SuperLED 50',

  Price: 1600,

  Current_Inventory: 77,

  Backorder: 0,

  Manufacturing: 55,

  Category: 'Televisions',

  IconSrc: 'tv.svg',

}, {

  ID: 5,

  Name: 'SuperLED 42',

  Price: 1450,

  Current_Inventory: 445,

  Backorder: 0,

  Manufacturing: 0,

  Category: 'Televisions',

  IconSrc: 'tv.svg',

}];

​

export const simpleProductLabel = { 'aria-label': 'Simple Product' };

export const deferredProductLabel = { 'aria-label': 'Deferred Product' };

export const productLabel = { 'aria-label': 'Product' };

​

window.exports = window.exports || {};

window.config = {

  transpiler: 'ts',

  typescriptOptions: {

    module: 'system',

    emitDecoratorMetadata: true,

    experimentalDecorators: true,

    jsx: 'react',

  },

  meta: {

    'react': {

      'esModule': true,

    },

    'typescript': {

      'exports': 'ts',

    },

    'devextreme/time_zone_utils.js': {

      'esModule': true,

    },

    'devextreme/localization.js': {

      'esModule': true,

    },

    'devextreme/viz/palette.js': {

      'esModule': true,

    },

    'openai': {

      'esModule': true,

    },

  },

  paths: {

    'npm:': 'https://unpkg.com/',

    'bundles:': 'bundles/',

    'externals:': 'bundles/externals/',

  },

  defaultExtension: 'js',

  map: {

    'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',

    'typescript': 'npm:typescript@4.2.4/lib/typescript.js',

    'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js',

    'react': 'npm:react@17.0.2/umd/react.development.js',

    'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js',

    'prop-types': 'npm:prop-types/prop-types.js',

    'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',

    'luxon': 'npm:luxon@3.4.4/build/global/luxon.min.js',

    'es6-object-assign': 'npm:es6-object-assign',

    'devextreme': 'npm:devextreme@24.2.6/cjs',

    'devextreme-react': 'npm:devextreme-react@24.2.6/cjs',

    'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js',

    'devexpress-diagram': 'npm:devexpress-diagram@2.2.15/dist/dx-diagram.js',

    'devexpress-gantt': 'npm:devexpress-gantt@4.1.60/dist/dx-gantt.js',

    '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.12',

    'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js',

    'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js',

    'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js',

    'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',

    'inferno-hydrate': 'npm:inferno-hydrate/dist/inferno-hydrate.min.js',

    'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js',

    'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js',

    'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js',

    'devextreme-cldr-data': 'npm:devextreme-cldr-data@1.0.3',

    // SystemJS plugins

    'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js',

    'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js',

    // Prettier

    'prettier/standalone': 'npm:prettier@2.8.8/standalone.js',

    'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js',

  },

  packages: {

    'devextreme': {

      defaultExtension: 'js',

    },

    'devextreme-react': {

      main: 'index.js',

    },

    'devextreme/events/utils': {

      main: 'index',

    },

    'devextreme/common/core/events/utils': {

      main: 'index',

    },

    'devextreme/localization/messages': {

      format: 'json',

      defaultExtension: 'json',

    },

    'devextreme/events': {

      main: 'index',

    },

    'es6-object-assign': {

      main: './index.js',

      defaultExtension: 'js',

    },

  },

  packageConfigPaths: [

    'npm:@devextreme/*/package.json',

    'npm:@devextreme/runtime@3.0.12/inferno/package.json',

  ],

  babelOptions: {

    sourceMaps: false,

    stage0: true,

    react: true,

  },

};

System.config(window.config);

​

import React from 'react';

​

export default function ConditionalIcon({ value }) {

  if (value) {

    return (

      <img

        alt="Custom icon"

        src={`images/icons/${value.IconSrc}`}

        className="custom-icon"

      />

    );

  }

  return <div className="dx-dropdowneditor-icon"></div>;

}

​

import React from 'react';

​

export default function ImageIcon() {

  return (

    <img

      alt="Custom icon"

      src="images/icons/custom-dropbutton-icon.svg"

      className="custom-icon"

    />

  );

}

​

import React from 'react';

import LoadIndicator from 'devextreme-react/load-indicator';

​

export default function IndicatorIcon({ isLoaded }) {

  return (

    <span>

      <LoadIndicator visible={!isLoaded} />

      <span hidden={!isLoaded}>

        <img

          alt="Custom icon"

          src="images/icons/custom-dropbutton-icon.svg"

          className="custom-icon"

        />

      </span>

    </span>

  );

}

​

import React from 'react';

​

export default function Item({ IconSrc, Name }) {

  return (

    <div className="custom-item">

      <img

        alt={Name}

        src={`images/icons/${IconSrc}`}

      />

      <div className="product-name">{Name}</div>

    </div>

  );

}

​

import React from 'react';

import ReactDOM from 'react-dom';

import App from './App.js';

​

ReactDOM.render(<App />, document.getElementById('app'));

​

export const simpleProducts = [

  'HD Video Player',

  'SuperHD Video Player',

  'SuperPlasma 50',

  'SuperLED 50',

  'SuperLED 42',

];

export const products = [

  {

    ID: 1,

    Name: 'HD Video Player',

    Price: 330,

    Current_Inventory: 225,

    Backorder: 0,

    Manufacturing: 10,

    Category: 'Video Players',

    IconSrc: 'video-player.svg',

  },

  {

    ID: 2,

    Name: 'SuperHD Player',

    Price: 400,

    Current_Inventory: 150,

    Backorder: 0,

    Manufacturing: 25,

    Category: 'Video Players',

    IconSrc: 'video-player.svg',

  },

  {

    ID: 3,

    Name: 'SuperPlasma 50',

    Price: 2400,

    Current_Inventory: 0,

    Backorder: 0,

    Manufacturing: 0,

    Category: 'Televisions',

    IconSrc: 'tv.svg',

  },

  {

    ID: 4,

    Name: 'SuperLED 50',

    Price: 1600,

    Current_Inventory: 77,

    Backorder: 0,

    Manufacturing: 55,

    Category: 'Televisions',

    IconSrc: 'tv.svg',

  },

  {

    ID: 5,

    Name: 'SuperLED 42',

    Price: 1450,

    Current_Inventory: 445,

    Backorder: 0,

    Manufacturing: 0,

    Category: 'Televisions',

    IconSrc: 'tv.svg',

  },

];

export const simpleProductLabel = { 'aria-label': 'Simple Product' };

export const deferredProductLabel = { 'aria-label': 'Deferred Product' };

export const productLabel = { 'aria-label': 'Product' };

​

<!DOCTYPE html>

<html lang="en">

  <head>↔</head>

​

  <body class="dx-viewport">

    <div class="demo-container">

      <div id="app"></div>

    </div>

  </body>

</html>

​

.dx-dropdowneditor-button .dx-button-content {

  text-align: center;

}

​

.dx-dropdowneditor-button .dx-button-content .dx-loadindicator {

  width: 1.5em;

  height: 1.5em;

}

​

.custom-icon {

  max-height: 100%;

  max-width: 100%;

  font-size: 28px;

  display: inline-block;

  vertical-align: middle;

}

​

.custom-item img {

  float: right;

}

​

.custom-item .product-name {

  line-height: 32px;

  padding-left: 5px;

}

​