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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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<template> <div> <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 :data-source="simpleProducts" drop-down-button-template="imageIcon" > <div slot="imageIcon" slot-scope="_" > <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 :data-source="deferredProducts" drop-down-button-template="loadIcon" > <div slot="loadIcon" slot-scope="{ data }" :deferredProducts="data" > <dx-load-indicator :visible="!isLoaded"/> <img :hidden="!isLoaded" 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">Value-dependent icon</div> <div class="dx-field-value"> <dx-select-box :data-source="products" :selected-item.sync="selectedItem" :value="1" :show-clear-button="true" display-expr="Name" value-expr="ID" drop-down-button-template="valueIcon" item-template="customItem" > <div slot="valueIcon" slot-scope="_" > <img v-if="selectedItem" :src="'../../../../images/icons/' + selectedItem.IconSrc" class="custom-icon" > <div v-if="!selectedItem" class="dx-dropdowneditor-icon" /> </div> <div slot="customItem" slot-scope="{ data: itemData }" :itemData = "itemData" > <div class="custom-item"> <img :src="'../../../../images/icons/' + itemData.IconSrc"> <div class="product-name"> {{ itemData.Name }} </div> </div> </div> </dx-select-box> </div> </div> </div> </div> </template> <script> import { DxSelectBox } from 'devextreme-vue/select-box'; import { DxLoadIndicator } from 'devextreme-vue/load-indicator'; import { products, simpleProducts } from './data.js'; export default { components: { DxSelectBox, DxLoadIndicator }, data() { return { products, simpleProducts, isLoaded: true, deferredProducts: { load: () => { this.isLoaded = false; var promise = new Promise((resolve) => { setTimeout(() => { resolve(simpleProducts); this.isLoaded = true; }, 3000); }); return promise; } }, selectedItem: products[0] }; } }; </script> <style scoped> .dx-dropdowneditor-button .dx-button-content { text-align: center; } .dx-theme-material .dx-dropdowneditor-button .dx-button-content .dx-loadindicator { width: 24px; height: 24px; } .custom-icon { max-height: 100%; max-width: 100%; font-size: 28px; display: inline-block; vertical-align: middle; } .dx-theme-android5 .custom-item img { padding: 4px 22px 0 0; } .custom-item img { float: right; } .custom-item .product-name { line-height: 32px; padding-left: 5px; } </style>
import Vue from 'vue'; import App from './App.vue'; new Vue({ el: '#app', components: { App }, template: '<App/>' });
<!DOCTYPE html> <html> <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/19.1.3/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/19.1.3/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import('./index.js'); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"> <span v-if="false">Loading...</span> </div> </div> </body> </html>
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' }];
System.config({ transpiler: 'plugin-babel', paths: { 'npm:': 'https://unpkg.com/' }, map: { vue: 'npm:vue@2.5.16/dist/vue.esm.browser.js', 'vue-loader': 'npm:systemjs-vue-browser@latest/index.js', 'devextreme': 'npm:devextreme@19.1', 'devextreme-vue': 'npm:devextreme-vue@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', 'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js' }, meta: { '*.vue': { loader: 'vue-loader' } }, packages: { 'devextreme-vue': { main: 'index.js' }, 'devextreme': { defaultExtension: 'js' } }, babelOptions: { sourceMaps: false, stage0: true } });