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.
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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
}
});