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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: 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 = {
loadMode: 'raw',
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:
// https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/
System.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@8.0.0/lib/plugin.js',
'typescript': 'npm:typescript@3.5.3/lib/typescript.js',
'@angular': 'npm:@angular',
'tslib': 'npm:tslib@2.0.3/tslib.js',
'rxjs': 'npm:rxjs@6.3.3',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.4',
'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.9.7/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.5',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.8',
'devextreme-angular': 'npm:devextreme-angular@20.2.4',
'preact': 'npm:preact@10.5.7/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.7/hooks/dist/hooks.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'
}
},
packageConfigPaths: [
"npm:@angular/*/package.json",
"npm:@angular/common/*/package.json",
"npm:rxjs/package.json",
"npm:rxjs/operators/package.json",
"npm:devextreme-angular/*/package.json",
"npm:devextreme-angular/ui/*/package.json",
"npm:devextreme-angular/package.json",
"npm:devexpress-diagram/package.json",
"npm:devexpress-gantt/package.json",
]
});
<!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/20.2.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js@0.10.2/dist/zone.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.3/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>