Custom Thumbnails
Documentation
The FileManager widget allows you to provide custom thumbnails. Handle the customizeThumbnail option to specify how the widget presents files in folders.
Feel free to share demo-related thoughts here.
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If you have technical questions, please create a support ticket in the DevExpress Support Center.
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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';
}
}
}
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/20.1.8/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.8/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.8/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',
meta: {
},
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@20.1',
'devextreme-react': 'npm:devextreme-react@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@1.0.17',
'devexpress-gantt': 'npm:devexpress-gantt@1.0.10',
// 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'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
},
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
});