Tab Drag & Drop

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

Reorder Items
Wrap the TabPanel into the Sortable widget and set the following options as needed:

filter Specify a CSS selector to indicate draggable items. This demo sets filter to .dx-tab.
itemOrientation Set this options 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 option to display this icon.

Both handlers modify the TabPanel's dataSource.

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Vue

<template> <div> <div id="container"> <DxButton :disabled="disableButton()" text="Add Tab" icon="add" type="default" @click="addButtonHandler" /> </div> <DxSortable filter=".dx-tab" :data.sync="employees" item-orientation="horizontal" drag-direction="horizontal" @drag-start="onTabDragStart($event)" @reorder="onTabDrop($event)" > <div> <DxTabPanel :data-source.sync="employees" :height="410" :defer-rendering="false" :show-nav-buttons="true" :repaint-changes-only="true" :selected-index.sync="selectedIndex" item-title-template="title" item-template="itemTemplate" > <template #title="{ data: employee }"> <div> <span>{{ employee.FirstName }} {{ employee.LastName }}</span><i v-show="showCloseButton()" class="dx-icon dx-icon-close" @click="closeButtonHandler(employee)" /> </div> </template> <template #itemTemplate="{ data: employee }"> <EmployeeTemplate :template-data="employee" /> </template> </DxTabPanel> </div> </DxSortable> </div> </template> <script> import DxSortable from 'devextreme-vue/sortable'; import DxButton from 'devextreme-vue/button'; import DxTabPanel from 'devextreme-vue/tab-panel'; import { DxDataGrid } from 'devextreme-vue/data-grid'; import EmployeeTemplate from './EmployeeTemplate.vue'; import service from './data.js'; const allEmployees = service.getEmployees(); export default { components: { DxButton, DxTabPanel, DxDataGrid, DxSortable, EmployeeTemplate }, data() { return { employees: allEmployees.slice(0, 3), selectedIndex: 0 }; }, methods: { onTabDragStart(e) { e.itemData = e.fromData[e.fromIndex]; }, onTabDrop(e) { e.fromData.splice(e.fromIndex, 1); e.toData.splice(e.toIndex, 0, e.itemData); }, addButtonHandler() { const newItem = allEmployees.filter(employee => this.employees.indexOf(employee) === -1)[0]; this.selectedIndex = this.employees.length; this.employees.push(newItem); }, closeButtonHandler(itemData) { const index = this.employees.indexOf(itemData); this.employees.splice(index, 1); if(index >= this.employees.length && index > 0) this.selectedIndex = index - 1; }, disableButton() { return this.employees.length === allEmployees.length; }, showCloseButton() { return this.employees.length > 1; } } }; </script> <style> #container { display: flex; justify-content: flex-end; padding-bottom: 10px; } .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; } .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; } </style>

<template> <div> <div class="employeeInfo"> <img class="employeePhoto" :src="picture" > <p class="employeeNotes"><b>Position: {{ position }}</b><br>{{ notes }}</p> </div> <div class="caption">{{ detailInfo }}</div> <div class="task-list"> <DxList :data-source="dataSource" :show-selection-controls="true" :selected-items="completedTasks" :disabled="true" selection-mode="multiple" > <template #item="{ data: item }"> <div> {{ item.Subject }} </div> </template> </DxList> </div> </div> </template> <script> import DxList from 'devextreme-vue/list'; import service from './data.js'; const tasks = service.getTasks(); export default { components: { DxList }, props: { templateData: { type: Object, default: () => {} } }, data() { const { FirstName, LastName, Picture, Position, Notes } = this.templateData; const employeeTasks = tasks.filter(task => task.EmployeeID === this.templateData.ID); return { dataSource: employeeTasks, completedTasks: employeeTasks.filter(task => task.Status === 'Completed'), detailInfo: `${ FirstName } ${ LastName }'s Tasks:`, picture: Picture, position: Position, notes: Notes }; } }; </script> <style> .caption { padding: 0px 0px 10px 30px; font-size: 14px; font-weight: bold; } .task-list { padding: 0px 20px; } .task-list .dx-state-disabled { opacity: 1; } .task-list .dx-state-disabled .dx-list-item { opacity: 1; } </style>

import Vue from 'vue'; import App from './App.vue'; new Vue({ el: '#app', components: { App }, template: '<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" /> <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>

System.config({ transpiler: 'plugin-babel', meta: { '*.vue': { loader: 'vue-loader' }, }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'vue': 'npm:vue@2.6.3/dist/vue.esm.browser.js', 'vue-loader': 'npm:dx-systemjs-vue-browser@latest/index.js', 'devextreme': 'npm:devextreme@20.1', 'devextreme-vue': 'npm:devextreme-vue@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', 'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js' }, packages: { 'devextreme-vue': { main: 'index.js' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme/events/utils': { main: 'index' }, 'devextreme/events': { main: 'index' }, }, babelOptions: { sourceMaps: false, stage0: true } });

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