Custom Thumbnails
Documentation
The FileManager component allows you to provide custom thumbnails. Handle the customizeThumbnail property to specify how the component 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 {
constructor(props) {
super(props);
this.state = {
itemViewMode: 'thumbnails',
};
this.onOptionChanged = this.onOptionChanged.bind(this);
}
onOptionChanged(e) {
if (e.fullName === 'itemView.mode') {
this.setState({
itemViewMode: e.value,
});
}
}
render() {
return (
<FileManager
fileSystemProvider={fileItems}
customizeThumbnail={this.customizeIcon}
height={450}
onOptionChanged={this.onOptionChanged}>
<ItemView
mode={this.state.itemViewMode}>
</ItemView>
<Permissions
create={true}
copy={true}
move={true}
delete={true}
rename={true}
upload={true}
download={true}>
</Permissions>
</FileManager>
);
}
customizeIcon(fileSystemItem) {
if (fileSystemItem.isDirectory) {
return '../../../../images/thumbnails/folder.svg';
}
const fileExtension = fileSystemItem.getFileExtension();
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';
default:
return '../../../../images/thumbnails/doc-txt.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/22.2.5/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/22.2.5/css/dx-gantt.min.css" />
<script src="https://unpkg.com/core-js@2.6.12/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,
}];
window.config = {
transpiler: 'plugin-babel',
meta: {
'devextreme/localization.js': {
'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
},
defaultExtension: 'js',
map: {
'react': 'npm:react@17.0.2/umd/react.development.js',
'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js',
'prop-types': 'npm:prop-types@15.8.1/prop-types.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.28.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@22.2.5/cjs',
'devextreme-react': 'npm:devextreme-react@22.2.5',
'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.5.20/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.1.72/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.42/dist/dx-gantt.js',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.11',
'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js',
// Prettier
'prettier/standalone': 'npm:prettier@2.8.4/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.4/parser-html.js',
},
packages: {
'devextreme': {
defaultExtension: 'js',
},
'devextreme-react': {
main: 'index.js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/events': {
main: 'index',
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
'npm:@devextreme/runtime@3.0.11/inferno/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true,
},
};
System.config(window.config);