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.
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import React from 'react';
import { FilterBuilder } from 'devextreme-react';
import { CustomOperation } from 'devextreme-react/filter-builder';
import { filter, fields, groupOperations } from './data.js';
import { formatValue } from './helpers.js';
import { EditorComponent } from './EditorComponent.js';
class App extends React.Component {
constructor(props) {
super(props);
this.state = {
value: filter
};
this.onValueChanged = this.onValueChanged.bind(this);
this.updateTexts = this.updateTexts.bind(this);
}
render() {
return (
<div>
<FilterBuilder
fields={fields}
value={this.state.value}
onInitialized={this.updateTexts}
groupOperations={groupOperations}
onValueChanged={this.onValueChanged}
>
<CustomOperation
name={'anyof'}
caption={'Is any of'}
icon={'check'}
editorComponent={EditorComponent}
calculateFilterExpression={calculateFilterExpression}
/>
</FilterBuilder>
<div className={'results'}>
<div>
<b>Value</b>
<pre>{this.state.filterText}</pre>
</div>
<div>
<b>DataSource's filter expression</b>
<pre>{this.state.dataSourceText}</pre>
</div>
</div>
</div>
);
}
updateTexts(e) {
this.setState({
filterText: formatValue(e.component.option('value')),
dataSourceText: formatValue(e.component.getFilterExpression())
});
}
onValueChanged(e) {
this.setState({ value: e.value });
this.updateTexts(e);
}
}
function calculateFilterExpression(filterValue, field) {
return filterValue && filterValue.length
&& Array.prototype.concat.apply([], filterValue.map(function(value) {
return [[field.dataField, '=', value], 'or'];
})).slice(0, -1);
}
export default App;
import React from 'react';
import { TagBox } from 'devextreme-react';
import { categories } from './data.js';
export class EditorComponent extends React.Component {
constructor(props) {
super(props);
this.onValueChanged = this.onValueChanged.bind(this);
}
render() {
return (
<TagBox
defaultValue={this.props.data.value}
items={categories}
onValueChanged={this.onValueChanged}
width={'auto'}
/>
);
}
onValueChanged(e) {
this.props.setValue(e.value && e.value.length ? e.value : null);
}
}
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 React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(
<App />,
document.getElementById('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" />
<link rel="stylesheet" type ="text/css" href ="styles.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>
.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;
}
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 groupOperations = ['and', 'or'];
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',
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@16/umd/react.development.js',
'react-dom': 'npm:react-dom@16/umd/react-dom.development.js',
'prop-types': 'npm:prop-types/prop-types.js',
'devextreme': 'npm:devextreme@19.1',
'devextreme-react': 'npm:devextreme-react@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',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js',
'systemjs-babel-build':
'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js'
},
packages: {
'devextreme': {
defaultExtension: 'js'
},
'devextreme-react': {
main: 'index.js'
}
},
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
});