Customize Drop-Down Button
Use the dropDownButtonTemplate to customize the drop-down button. This demo illustrates three customization cases:
-
Custom image
Declare animgelement 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.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
Thank you!
We appreciate your feedback.
We appreciate your feedback.
<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>
<span [hidden]="!isLoaded">
<img
src="../../../../images/icons/custom-dropbutton-icon.svg"
class="custom-icon"
/>
</span>
</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(document.location.host)) {
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 = true;
selectedItem: Product;
deferredProducts: any;
constructor(service: Service) {
const that = this;
this.products = service.getProducts();
this.selectedItem = this.products[0];
this.simpleProducts = service.getSimpleProducts();
this.deferredProducts = {
loadMode: 'raw',
load() {
that.isLoaded = false;
const promise = new Promise((resolve, reject) => {
setTimeout(() => {
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;
}
const simpleProducts: string[] = [
'HD Video Player',
'SuperHD Video Player',
'SuperPlasma 50',
'SuperLED 50',
'SuperLED 42',
];
const 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:
// https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/
window.config = {
transpiler: 'ts',
typescriptOptions: {
module: 'system',
emitDecoratorMetadata: true,
experimentalDecorators: true,
},
meta: {
'typescript': {
'exports': 'ts',
},
'devextreme/localization.js': {
'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
},
map: {
'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
'@angular/core': 'npm:@angular/core@12.2.17',
'@angular/platform-browser': 'npm:@angular/platform-browser@12.2.17',
'@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@12.2.17',
'@angular/forms': 'npm:@angular/forms@12.2.17',
'@angular/common': 'npm:@angular/common@12.2.17',
'@angular/compiler': 'npm:@angular/compiler@12.2.17',
'tslib': 'npm:tslib@2.3.1/tslib.js',
'rxjs': 'npm:rxjs@7.5.3/dist/bundles/rxjs.umd.js',
'rxjs/operators': 'npm:rxjs@7.5.3/dist/cjs/operators/index.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.28.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@22.2.6/cjs',
'devextreme/bundles/dx.all': 'npm:devextreme@22.2.6/bundles/dx.all.js',
'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.5.20/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.1.72',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.43',
'devextreme-angular': 'npm:devextreme-angular@22.2.6',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.11',
'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@7.4.11/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',
// Prettier
'prettier/standalone': 'npm:prettier@2.8.4/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.4/parser-html.js',
},
packages: {
'app': {
main: './app.component.ts',
defaultExtension: 'ts',
},
'devextreme': {
defaultExtension: 'js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/events': {
main: 'index',
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js',
},
'rxjs': {
defaultExtension: 'js',
},
'rxjs/operators': {
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
'npm:@devextreme/runtime@3.0.11/inferno/package.json',
'npm:@angular/*/package.json',
'npm:@angular/common@12.2.17/*/package.json',
'npm:rxjs@7.5.3/package.json',
'npm:rxjs@7.5.3/operators/package.json',
'npm:devextreme-angular@22.2.6/*/package.json',
'npm:devextreme-angular@22.2.6/ui/*/package.json',
'npm:devextreme-angular@22.2.6/package.json',
'npm:devexpress-diagram@2.1.72/package.json',
'npm:devexpress-gantt@4.1.43/package.json',
],
};
System.config(window.config);
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<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="https://cdn3.devexpress.com/jslib/22.2.6/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js@0.13.0/dist/zone.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.13/Reflect.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></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>