Tab Drag & Drop

This demo illustrates how you can allow end-users to reorder, add, and remove tabs within the DevExtreme TabPanel component.

Reorder tabs

Wrap the TabPanel into the Sortable component and set the following properties as needed:

filter
Specify a CSS selector to indicate draggable items. This demo sets filter to .dx-tab.
itemOrientation
Set this property to "horizontal". When a user drags a tab, remaining items move left and right to designate the drop target.
onDragStart and onReorder
Implement these handlers to configure drag and drop logic and modify the dataSource after the tabs are reordered.

Add or remove tabs

This demo adds and removes tabs in the following two functions:

addButtonHandler - a click handler for the "Add Tab" button.
closeButtonHandler - a click handler for a tab's Close icon. The demo uses the itemTitleTemplate property to display this icon.

Both handlers modify the TabPanel's dataSource.

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import React from 'react'; import { Button } from 'devextreme-react'; import { Sortable } from 'devextreme-react/sortable'; import TabPanel from 'devextreme-react/tab-panel'; import 'devextreme/data/odata/store'; import service from './data.js'; import EmployeeTemplate from './EmployeeTemplate.js'; const allEmployees = service.getEmployees(); function App() { const [employees, setEmployees] = React.useState(allEmployees.slice(0, 3)); const [selectedItem, setSelectedItem] = React.useState(allEmployees[0]); const addButtonHandler = React.useCallback(() => { const newItem = allEmployees .filter((employee) => employees.indexOf(employee) === -1)[0]; setEmployees([...employees, newItem]); setSelectedItem(newItem); }, [employees, setEmployees, setSelectedItem]); function disableButton() { return employees.length === allEmployees.length; } const closeButtonHandler = React.useCallback((item) => { const newEmployees = [...employees]; const index = newEmployees.indexOf(item); newEmployees.splice(index, 1); setEmployees(newEmployees); if (index >= newEmployees.length && index > 0) { setSelectedItem(newEmployees[index - 1]); } }, [employees, setEmployees, setSelectedItem]); const renderTitle = React.useCallback((data) => ( <React.Fragment> <div> <span> {data.FirstName} {data.LastName} </span> {employees.length >= 2 && <i className="dx-icon dx-icon-close" onClick={() => { closeButtonHandler(data); }} />} </div> </React.Fragment> ), [employees, closeButtonHandler]); const onSelectionChanged = React.useCallback((args) => { setSelectedItem(args.addedItems[0]); }, [setSelectedItem]); const onTabDragStart = React.useCallback((e) => { e.itemData = e.fromData[e.fromIndex]; }, []); const onTabDrop = React.useCallback((e) => { const newEmployees = [...employees]; newEmployees.splice(e.fromIndex, 1); newEmployees.splice(e.toIndex, 0, e.itemData); setEmployees(newEmployees); }, [employees, setEmployees]); return ( <React.Fragment> <div id="container"> <Button disabled={disableButton()} text="Add Tab" icon="add" type="default" onClick={addButtonHandler} /> </div> <Sortable filter=".dx-tab" data={employees} itemOrientation="horizontal" dragDirection="horizontal" onDragStart={onTabDragStart} onReorder={onTabDrop} > <TabPanel dataSource={employees} height={410} itemTitleRender={renderTitle} deferRendering={false} showNavButtons={true} selectedItem={selectedItem} repaintChangesOnly={true} onSelectionChanged={onSelectionChanged} itemComponent={EmployeeTemplate} /> </Sortable> </React.Fragment> ); } 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/22.2.6/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.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> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>

#container { display: flex; justify-content: flex-end; padding-bottom: 10px; } .dx-tabs .dx-tabs-wrapper .dx-item.dx-tab { width: auto; padding-left: 20px; } .dx-tab-content .dx-icon.dx-icon-close { display: inline-block; opacity: 0.6; margin-right: 0; margin-left: 7px; font-size: 18px; } .dx-sortable-dragging .dx-tab { box-sizing: border-box; text-align: center; } .employeeInfo .employeePhoto { height: 100px; float: left; padding: 10px 20px 10px 20px; } .caption { padding: 0 0 10px 30px; font-size: 14px; font-weight: bold; } .task-list { padding: 0 20px; } .task-list .dx-state-disabled { opacity: 1; } .task-list .dx-state-disabled .dx-list-item { opacity: 1; } .employeeInfo .employeeNotes { min-height: 100px; padding: 20px; text-align: justify; white-space: normal; } .dx-theme-generic .dx-tabs-wrapper .dx-item.dx-tab { padding-left: 14px; padding-right: 9px; line-height: 1.618; } .dx-theme-generic .dx-icon.dx-icon-close { font-size: 15px; } .dx-theme-material .dx-tab-content span { vertical-align: middle; line-height: initial; } .dx-theme-material .employeeNotes { margin: 0; }

import React from 'react'; import { List } from 'devextreme-react/list'; import service from './data.js'; function itemRender(data) { return <div>{data.Subject}</div>; } function EmployeeTemplate(props) { const tasks = service .getTasks() .filter((task) => task.EmployeeID === props.data.ID); const { FirstName, LastName, Picture, Position, Notes, } = props.data; const completedTasks = tasks.filter((task) => task.Status === 'Completed'); return ( <React.Fragment> <div className="employeeInfo"> <img className="employeePhoto" src={Picture} /> <p className="employeeNotes"> <b>{`Position: ${Position}`}</b> <br /> {Notes} </p> </div> <div className="caption">{`${FirstName} ${LastName}'s Tasks:`}</div> <div className="task-list"> <List dataSource={tasks} showSelectionControls={true} selectedItems={completedTasks} disabled={true} selectionMode="multiple" itemRender={itemRender} ></List> </div> </React.Fragment> ); } export default EmployeeTemplate;

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@22.2.6/cjs', 'devextreme-react': 'npm:devextreme-react@22.2.6', '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@4.1.43/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);

Tab Drag & Drop

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