Customization
Documentation
In this demo, a custom filter operation, "anyof", is implemented. The calculateFilterExpression function converts it into DataSource-compatible operations. The compatible and incompatible filter expressions are displayed under the FilterBuilder.
The set of available group operations is limited to "and" and "or" using the groupOperations array, and the groups’ maximum nesting level is limited to one using the maxGroupLevel.
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.
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<template>
<div>
<DxFilterBuilder
:fields="fields"
:value="filter"
:group-operations="groupOperations"
@initialized="updateTexts"
@value-changed="updateTexts"
>
<DxCustomOperation
:calculate-filter-expression="calculateFilterExpression"
name="anyof"
caption="Is any of"
icon="check"
editor-template="editorComponentTemplate"
/>
<template #editorComponentTemplate="{ data: conditionInfo }">
<EditorComponent :condition-info="conditionInfo"/>
</template>
</DxFilterBuilder>
<div class="results">
<div>
<b>Value</b>
<pre>{{ filterText }}</pre>
</div>
<div>
<b>DataSource's filter expression</b>
<pre>{{ dataSourceText }}</pre>
</div>
</div>
</div>
</template>
<script>
import DxFilterBuilder, { DxCustomOperation } from 'devextreme-vue/filter-builder';
import { filter, fields } from './data.js';
import { formatValue } from './helpers.js';
import EditorComponent from './EditorComponent.vue';
export default {
components: {
DxFilterBuilder,
DxCustomOperation,
EditorComponent
},
data() {
return {
fields,
filter,
filterText: '',
groupOperations: ['and', 'or'],
dataSourceText: ''
};
},
methods: {
updateTexts(e) {
this.filterText = formatValue(e.component.option('value'));
this.dataSourceText = formatValue(e.component.getFilterExpression());
},
calculateFilterExpression(filterValue, field) {
return filterValue && filterValue.length
&& Array.prototype.concat.apply([], filterValue.map(function(value) {
return [[field.dataField, '=', value], 'or'];
})).slice(0, -1);
}
}
};
</script>
<style scoped>
.results {
margin-top: 50px;
display: flex;
justify-content: space-between;
}
.results > div {
flex-basis: 49%;
max-width: 50%;
background-color: rgba(191, 191, 191, 0.15);
position: relative;
}
.results b {
position: absolute;
top: -25px;
}
.results pre {
padding: 10px 20px;
height: 100%;
font-size: 13px;
overflow: auto;
box-sizing: border-box;
}
.dx-tagbox {
min-width: 150px;
}
.dx-filterbuilder .dx-numberbox {
width: 80px;
}
</style>
<template>
<DxTagBox
:value="conditionInfo.value"
:items="categories"
width="auto"
@value-changed="onValueChanged"
/>
</template>
<script>
import DxTagBox from 'devextreme-vue/tag-box';
import { categories } from './data.js';
export default {
components: {
DxTagBox
},
props: {
conditionInfo: {
type: Object,
default: () => {}
}
},
data() {
return {
categories
};
},
methods: {
onValueChanged(e) {
this.conditionInfo.setValue(e.value && e.value.length ? e.value : null);
}
}
};
</script>
export function formatValue(value, spaces) {
if(value && Array.isArray(value[0])) {
var TAB_SIZE = 4;
spaces = spaces || TAB_SIZE;
return `[${getLineBreak(spaces)}${value.map(function(item) {
return Array.isArray(item[0]) ? formatValue(item, spaces + TAB_SIZE) : JSON.stringify(item);
}).join(`,${getLineBreak(spaces)}`)}${getLineBreak(spaces - TAB_SIZE)}]`;
}
return JSON.stringify(value);
}
function getLineBreak(spaces) {
return `\r\n${new Array(spaces + 1).join(' ')}`;
}
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/20.1.6/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.6/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">
</div>
</div>
</body>
</html>
export const filter = [
['Category', 'anyof', ['Automation', 'Monitors']],
'or',
[
['Category', '=', 'Televisions'],
'and',
['Price', 'between', [2000, 4000]]
]
];
export const categories = [
'Video Players',
'Televisions',
'Monitors',
'Projectors',
'Automation'
];
export const fields = [{
dataField: 'Name'
}, {
dataField: 'Price',
dataType: 'number',
format: 'currency'
}, {
dataField: 'Current_Inventory',
dataType: 'number',
caption: 'Inventory'
}, {
dataField: 'Category',
filterOperations: ['=', 'anyof'],
lookup: {
dataSource: categories
}
}];
System.config({
transpiler: 'plugin-babel',
meta: {
'*.vue': {
loader: 'vue-loader'
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
'vue': 'npm:vue@2.6.3/dist/vue.esm.browser.js',
'vue-loader': 'npm:dx-systemjs-vue-browser@latest/index.js',
'devextreme': 'npm:devextreme@20.1',
'devextreme-vue': 'npm:devextreme-vue@20.1',
'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.7/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram@1.0.9',
'devexpress-gantt': 'npm:devexpress-gantt@1.0.7',
'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js'
},
packages: {
'devextreme-vue': {
main: 'index.js'
},
'devextreme': {
defaultExtension: 'js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
},
babelOptions: {
sourceMaps: false,
stage0: true
}
});