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File Manager

Custom Thumbnails

Documentation

The FileManager widget allows you to provide custom thumbnails. Handle the customizeThumbnail event to specify how the widget presents files in folders.

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import React from 'react'; import FileManager, { Permissions, ItemView } from 'devextreme-react/file-manager'; import { fileItems } from './data.js'; class App extends React.Component { render() { return ( <FileManager fileProvider={fileItems} customizeThumbnail={ this.customizeIcon }> <ItemView mode="thumbnails"> </ItemView> <Permissions create={true} copy={true} move={true} remove={true} rename={true}> </Permissions> </FileManager> ); } customizeIcon(fileManagerItem) { if (fileManagerItem.isDirectory) { return '../../../../images/thumbnails/folder.svg'; } var fileExtension = fileManagerItem.getExtension(); switch (fileExtension) { case '.txt': return '../../../../images/thumbnails/doc-txt.svg'; case '.rtf': return '../../../../images/thumbnails/doc-rtf.svg'; case '.xml': return '../../../../images/thumbnails/doc-xml.svg'; } } } export default App;
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/19.2.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/css/dx-gantt.min.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> <link rel="stylesheet" type="text/css" href="styles.css" /> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>
export const fileItems = [{ 'name': 'Documents', 'isDirectory': true, 'items': [{ 'name': 'Projects', 'isDirectory': true, 'items': [{ 'name': 'About.rtf', 'isDirectory': false, 'size': 1024 }, { 'name': 'Passwords.rtf', 'isDirectory': false, 'size': 2048 }] }, { 'name': 'About.xml', 'isDirectory': false, 'size': 1024 }, { 'name': 'Managers.rtf', 'isDirectory': false, 'size': 2048 }, { 'name': 'ToDo.txt', 'isDirectory': false, 'size': 3072 }], }, { 'name': 'Images', 'isDirectory': true, 'items': [{ 'name': 'logo.png', 'isDirectory': false, 'size': 20480 }, { 'name': 'banner.gif', 'isDirectory': false, 'size': 10240 }] }, { 'name': 'System', 'isDirectory': true, 'items': [{ 'name': 'Employees.txt', 'isDirectory': false, 'size': 3072 }, { 'name': 'PasswordList.txt', 'isDirectory': false, 'size': 5120 }] }, { 'name': 'Description.rtf', 'isDirectory': false, 'size': 1024 }, { 'name': 'Description.txt', 'isDirectory': false, 'size': 2048 }];
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@19.2', 'devextreme-react': 'npm:devextreme-react@19.2', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.7/dist/quill.js', 'devexpress-diagram': 'npm:devexpress-diagram', 'devexpress-gantt': 'npm:devexpress-gantt', // 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 } });