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Select Box

Customize Drop-Down Button

Use the dropDownButtonTemplate to customize the drop-down button. This demo illustrates three customization cases:

  • Custom image
    Declare an img element in the template.

  • Load indicator
    Declare the load indicator and a regular icon in the template. Display the load indicator while hiding the icon, and vice versa.

  • Icon that depends on the selected value
    Declare the default and the selected item's icon in the template. If there is a selected item, display its icon; otherwise, show the default icon.

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<div class="dx-fieldset"> <div class="dx-field"> <div class="dx-field-label">Image as the icon</div> <div class="dx-field-value"> <dx-select-box [dataSource]="simpleProducts"> <div *dxTemplate="let data of 'dropDownButton'"> <img src="../../../../images/icons/custom-dropbutton-icon.svg" class="custom-icon"/> </div> </dx-select-box> </div> </div> <div class="dx-field"> <div class="dx-field-label">Load indicator as the icon</div> <div class="dx-field-value"> <dx-select-box [dataSource]="deferredProducts"> <div *dxTemplate="let data of 'dropDownButton'"> <dx-load-indicator [visible]="!isLoaded"></dx-load-indicator> <img src="../../../../images/icons/custom-dropbutton-icon.svg" [hidden]="!isLoaded" class="custom-icon"/> </div> </dx-select-box> </div> </div> <div class="dx-field"> <div class="dx-field-label">Value-dependent icon</div> <div class="dx-field-value"> <dx-select-box [dataSource]="products" [(selectedItem)]="selectedItem" [value]="1" showClearButton="true" displayExpr="Name" valueExpr="ID" > <div *dxTemplate="let data of 'dropDownButton'"> <img *ngIf="selectedItem" src="../../../../images/icons/{{selectedItem.IconSrc}}" class="custom-icon"/> <div *ngIf="!selectedItem" class="dx-dropdowneditor-icon"></div> </div> <div *dxTemplate="let data of 'item'" class="custom-item"> <img src="../../../../images/icons/{{data.IconSrc}}"/> <div class='product-name'>{{data.Name}}</div> </div> </dx-select-box> </div> </div> </div>
import { NgModule, Component, enableProdMode } from '@angular/core'; import {BrowserModule} from '@angular/platform-browser'; import {platformBrowserDynamic} from '@angular/platform-browser-dynamic'; import { DxSelectBoxModule, DxLoadIndicatorModule, DxTemplateModule } from 'devextreme-angular'; import ArrayStore from 'devextreme/data/array_store'; import {Product, Service} from './app.service'; if(!/localhost/.test( { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], providers: [Service] }) export class AppComponent { simpleProducts: string[]; products: Product[]; data: any; isLoaded: boolean = true; selectedItem: Product; deferredProducts: any; constructor(service: Service) { let that = this; this.products = service.getProducts(); this.selectedItem = this.products[0]; this.simpleProducts = service.getSimpleProducts(); this.deferredProducts = { load: function () { that.isLoaded = false; let promise = new Promise(function(resolve, reject) { setTimeout(function () { resolve(that.simpleProducts); that.isLoaded = true; }, 3000); }); return promise; } } } } @NgModule({ imports: [ BrowserModule, DxSelectBoxModule, DxLoadIndicatorModule, DxTemplateModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep .dx-dropdowneditor-button .dx-button-content { text-align: center; } ::ng-deep .dx-theme-material .dx-dropdowneditor-button .dx-button-content .dx-loadindicator { width: 24px; height: 24px; } ::ng-deep .custom-icon { max-height: 100%; max-width: 100%; font-size: 28px; display: inline-block; vertical-align: middle; } ::ng-deep .dx-theme-android5 .custom-item img { padding: 4px 22px 0 0; } ::ng-deep .custom-item img { float: right; } ::ng-deep .custom-item .product-name { line-height: 32px; padding-left: 5px; }
import {Injectable} from '@angular/core'; export class Product { ID: number; Name: string; Price: number; Current_Inventory: number; Backorder: number; Manufacturing: number; Category: string; IconSrc: string; } let simpleProducts: string[] = [ "HD Video Player", "SuperHD Video Player", "SuperPlasma 50", "SuperLED 50", "SuperLED 42" ]; let products: Product[] = [{ "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" }]; @Injectable() export class Service { getSimpleProducts(): string[] { return simpleProducts; } getProducts(): Product[] { return products; } }
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here: // System.config({ transpiler: 'ts', typescriptOptions: { module: "commonjs", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" } }, paths: { 'npm:': '' }, map: { 'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@3.4.5/lib/typescript.js', '@angular/core': 'npm:@angular/core@8.0.0/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@8.0.0/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@8.0.0/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@8.0.0/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@8.0.0/bundles/platform-browser-dynamic.umd.js', '@angular/router': 'npm:@angular/router@8.0.0/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@8.0.0/bundles/forms.umd.js', '@angular/common/http': 'npm:@angular/common@8.0.0/bundles/common-http.umd.js', 'tslib': 'npm:tslib/tslib.js', 'rxjs': 'npm:rxjs@6.3.3', 'rxjs/operators': 'npm:rxjs@6.3.3/operators', 'devextreme': 'npm:devextreme@19.1', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.6/dist/quill.js', 'devexpress-diagram': 'npm:devexpress-diagram', 'devextreme-angular': 'npm:devextreme-angular@19.1' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'rxjs': { main: 'index.js', defaultExtension: 'js' }, 'rxjs/operators': { main: 'index.js', defaultExtension: 'js' }, 'devextreme-angular': { main: 'index.js', defaultExtension: 'js' } } });
<!DOCTYPE html> <html xmlns=""> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <link rel="stylesheet" type="text/css" href="" /> <link rel="stylesheet" type="text/css" href="" /> <script src=""></script> <script src=""></script> <script src=""></script> <script src=""></script> <script src="config.js"></script> <script> System.import('app').catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>