Single Selection
Documentation
The DropDownBox widget is an editor that consists of a text field and drop-down content. The content can be anything. In this demo, it is the TreeView widget and the DataGrid widget. This demo also illustrates how to implement single selection and how to synchronize the DropDownBox with the nested widgets.
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<template>
<div class="dx-fieldset">
<div class="dx-field">
<div class="dx-field-label">DropDownBox with embedded TreeView</div>
<div class="dx-field-value">
<dx-drop-down-box
:value.sync="treeBoxValue"
:show-clear-button="true"
:data-source="treeDataSource"
value-expr="ID"
display-expr="name"
placeholder="Select a value..."
@value-changed="syncTreeViewSelection($event)"
>
<div
slot="content"
slot-scope="{ data }"
>
<dx-tree-view
:ref="treeViewRefName"
:data-source="treeDataSource"
:select-by-click="true"
data-structure="plain"
key-expr="ID"
parent-id-expr="categoryId"
selection-mode="single"
display-expr="name"
@content-ready="$event.component.selectItem(treeBoxValue)"
@item-selection-changed="treeView_itemSelectionChanged($event)"
/>
</div>
</dx-drop-down-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">DropDownBox with embedded DataGrid</div>
<div class="dx-field-value">
<dx-drop-down-box
:value.sync="gridBoxValue"
:defer-rendering="false"
:display-expr="gridBox_displayExpr"
:show-clear-button="true"
:data-source="gridDataSource"
value-expr="ID"
placeholder="Select a value..."
>
<div
slot="content"
slot-scope="{ data }"
>
<dx-data-grid
:data-source="gridDataSource"
:columns="['CompanyName', 'City', 'Phone']"
:hover-state-enabled="true"
:selected-row-keys.sync="gridSelectedRowKeys"
height="100%"
>
<dx-selection mode="single"/>
<dx-paging
:enabled="true"
:page-size="10"
/>
<dx-filter-row :visible="true"/>
<dx-scrolling mode="infinite"/>
</dx-data-grid>
</div>
</dx-drop-down-box>
</div>
</div>
</div>
</template>
<script>
import { DxDropDownBox, DxTreeView } from 'devextreme-vue';
import { DxDataGrid, DxSelection, DxPaging, DxFilterRow, DxScrolling } from 'devextreme-vue/data-grid';
import CustomStore from 'devextreme/data/custom_store';
import 'whatwg-fetch';
export default {
components: {
DxDropDownBox,
DxTreeView,
DxDataGrid,
DxSelection,
DxPaging,
DxFilterRow,
DxScrolling
},
data() {
return {
treeDataSource: null,
treeBoxValue: null,
gridDataSource: null,
grid_BoxValue: 3,
grid_SelectedRowKeys: [3],
treeViewRefName: 'tree-view'
};
},
computed: {
gridBoxValue: {
get: function() {
return this.grid_BoxValue;
},
set: function(value) {
this.grid_SelectedRowKeys = value && [value] || [];
this.grid_BoxValue = value;
}
},
gridSelectedRowKeys: {
get: function() {
return this.grid_SelectedRowKeys;
},
set: function(value) {
this.grid_BoxValue = value.length && value[0] || null;
this.grid_SelectedRowKeys = value;
}
}
},
created() {
this.treeDataSource = this.makeAsyncDataSource('treeProducts.json');
this.gridDataSource = this.makeAsyncDataSource('customers.json');
this.treeBoxValue = '1_1';
},
methods: {
makeAsyncDataSource(jsonFile) {
return new CustomStore({
loadMode: 'raw',
key: 'ID',
load: function() {
return fetch(`../../../../data/${ jsonFile}`)
.then(response => response.json());
}
});
},
syncTreeViewSelection() {
if (!this.$refs[this.textBoxRefName]) return;
if (!this.treeBoxValue) {
this.$refs[this.textBoxRefName].instance.unselectAll();
} else {
this.$refs[this.textBoxRefName].instance.selectItem(this.treeBoxValue);
}
},
treeView_itemSelectionChanged(e) {
this.treeBoxValue = e.component.getSelectedNodesKeys();
},
gridBox_displayExpr(item) {
return item && `${item.CompanyName } <${ item.Phone }>`;
}
}
};
</script>
<style scoped>
.dx-fieldset {
height: 500px;
}
</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/19.1.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.1.4/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/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>
const products = [{
id: '1',
text: 'Stores',
expanded: true,
items: [{
id: '1_1',
text: 'Super Mart of the West',
expanded: true,
items: [{
id: '1_1_1',
text: 'Video Players',
items: [{
id: '1_1_1_1',
text: 'HD Video Player',
price: 220,
image: '../../../../images/products/1.png'
}, {
id: '1_1_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 270
}]
}, {
id: '1_1_2',
text: 'Televisions',
expanded: true,
items: [{
id: '1_1_2_1',
text: 'SuperLCD 42',
image: '../../../../images/products/7.png',
price: 1200
}, {
id: '1_1_2_2',
text: 'SuperLED 42',
image: '../../../../images/products/5.png',
price: 1450
}, {
id: '1_1_2_3',
text: 'SuperLED 50',
image: '../../../../images/products/4.png',
price: 1600
}, {
id: '1_1_2_4',
text: 'SuperLCD 55',
image: '../../../../images/products/6.png',
price: 1350
}, {
id: '1_1_2_5',
text: 'SuperLCD 70',
image: '../../../../images/products/9.png',
price: 4000
}]
}, {
id: '1_1_3',
text: 'Monitors',
expanded: true,
items: [{
id: '1_1_3_1',
text: '19"',
expanded: true,
items: [{
id: '1_1_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 160
}]
}, {
id: '1_1_3_2',
text: '21"',
items: [{
id: '1_1_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 170
}, {
id: '1_1_3_2_2',
text: 'DesktopLED 21',
image: '../../../../images/products/13.png',
price: 175
}]
}]
}, {
id: '1_1_4',
text: 'Projectors',
items: [{
id: '1_1_4_1',
text: 'Projector Plus',
image: '../../../../images/products/14.png',
price: 550
}, {
id: '1_1_4_2',
text: 'Projector PlusHD',
image: '../../../../images/products/15.png',
price: 750
}]
}]
}, {
id: '1_2',
text: 'Braeburn',
items: [{
id: '1_2_1',
text: 'Video Players',
items: [{
id: '1_2_1_1',
text: 'HD Video Player',
image: '../../../../images/products/1.png',
price: 240
}, {
id: '1_2_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 300
}]
}, {
id: '1_2_2',
text: 'Televisions',
items: [{
id: '1_2_2_1',
text: 'SuperPlasma 50',
image: '../../../../images/products/3.png',
price: 1800
}, {
id: '1_2_2_2',
text: 'SuperPlasma 65',
image: '../../../../images/products/8.png',
price: 3500
}]
}, {
id: '1_2_3',
text: 'Monitors',
items: [{
id: '1_2_3_1',
text: '19"',
items: [{
id: '1_2_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 170
}]
}, {
id: '1_2_3_2',
text: '21"',
items: [{
id: '1_2_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 180
}, {
id: '1_2_3_2_2',
text: 'DesktopLED 21',
image: '../../../../images/products/13.png',
price: 190
}]
}]
}]
}, {
id: '1_3',
text: 'E-Mart',
items: [{
id: '1_3_1',
text: 'Video Players',
items: [{
id: '1_3_1_1',
text: 'HD Video Player',
image: '../../../../images/products/1.png',
price: 220
}, {
id: '1_3_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 275
}]
}, {
id: '1_3_3',
text: 'Monitors',
items: [{
id: '1_3_3_1',
text: '19"',
items: [{
id: '1_3_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 165
}]
}, {
id: '1_3_3_2',
text: '21"',
items: [{
id: '1_3_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 175
}]
}]
}]
}, {
id: '1_4',
text: 'Walters',
items: [{
id: '1_4_1',
text: 'Video Players',
items: [{
id: '1_4_1_1',
text: 'HD Video Player',
image: '../../../../images/products/1.png',
price: 210
}, {
id: '1_4_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 250
}]
}, {
id: '1_4_2',
text: 'Televisions',
items: [{
id: '1_4_2_1',
text: 'SuperLCD 42',
image: '../../../../images/products/7.png',
price: 1100
}, {
id: '1_4_2_2',
text: 'SuperLED 42',
image: '../../../../images/products/5.png',
price: 1400
}, {
id: '1_4_2_3',
text: 'SuperLED 50',
image: '../../../../images/products/4.png',
price: 1500
}, {
id: '1_4_2_4',
text: 'SuperLCD 55',
image: '../../../../images/products/6.png',
price: 1300
}, {
id: '1_4_2_5',
text: 'SuperLCD 70',
image: '../../../../images/products/9.png',
price: 4000
}, {
id: '1_4_2_6',
text: 'SuperPlasma 50',
image: '../../../../images/products/3.png',
price: 1700
}]
}, {
id: '1_4_3',
text: 'Monitors',
items: [{
id: '1_4_3_1',
text: '19"',
items: [{
id: '1_4_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 160
}]
}, {
id: '1_4_3_2',
text: '21"',
items: [{
id: '1_4_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 170
}, {
id: '1_4_3_2_2',
text: 'DesktopLED 21',
image: '../../../../images/products/13.png',
price: 180
}]
}]
}, {
id: '1_4_4',
text: 'Projectors',
items: [{
id: '1_4_4_1',
text: 'Projector Plus',
image: '../../../../images/products/14.png',
price: 550
}, {
id: '1_4_4_2',
text: 'Projector PlusHD',
image: '../../../../images/products/15.png',
price: 750
}]
}]
}]
}];
export default {
getProducts() {
return products;
}
};
System.config({
transpiler: 'plugin-babel',
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
vue: 'npm:vue@2.6.3/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',
'whatwg-fetch': 'npm:whatwg-fetch@2.0.4/fetch.js',
'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
}
});