Backend API
import React, { useCallback, useRef, useState } from 'react';
import TreeView, { type TreeViewTypes } from 'devextreme-react/tree-view';
import ContextMenu, { type ContextMenuTypes } from 'devextreme-react/context-menu';
import List from 'devextreme-react/list';
import service from './data.ts';
const products = service.getProducts();
const menuItems = service.getMenuItems();
const App = () => {
const contextMenuRef = useRef(null);
const treeViewRef = useRef(null);
const [logItems, setLogItems] = useState([]);
const [selectedTreeItem, setSelectedTreeItem] = useState(undefined);
const treeViewItemContextMenu = useCallback((
e: TreeViewTypes.ItemContextMenuEvent & { itemData: { price?: any; }; },
) => {
setSelectedTreeItem(e.itemData);
const isProduct = e.itemData.price !== undefined;
contextMenuRef.current.instance().option('items[0].visible', !isProduct);
contextMenuRef.current.instance().option('items[1].visible', !isProduct);
contextMenuRef.current.instance().option('items[2].visible', isProduct);
contextMenuRef.current.instance().option('items[3].visible', isProduct);
contextMenuRef.current.instance().option('items[0].disabled', e.node.expanded);
contextMenuRef.current.instance().option('items[1].disabled', !e.node.expanded);
}, []);
const contextMenuItemClick = useCallback((
e: ContextMenuTypes.ItemClickEvent & { itemData: { id?: any; }; },
) => {
let logEntry = '';
switch (e.itemData.id) {
case 'expand': {
logEntry = `The '${selectedTreeItem.text}' group was expanded`;
treeViewRef.current.instance().expandItem(selectedTreeItem.id);
break;
}
case 'collapse': {
logEntry = `The '${selectedTreeItem.text}' group was collapsed`;
treeViewRef.current.instance().collapseItem(selectedTreeItem.id);
break;
}
case 'details': {
logEntry = `Details about '${selectedTreeItem.text}' were displayed`;
break;
}
case 'copy': {
logEntry = `Information about '${selectedTreeItem.text}' was copied`;
break;
}
default:
break;
}
const updatedLogItems = [...logItems, logEntry];
setLogItems(updatedLogItems);
}, [logItems, selectedTreeItem, setLogItems]);
return (
<div className="form">
<TreeView
id="treeview"
ref={treeViewRef}
items={products}
width={300}
height={450}
onItemContextMenu={treeViewItemContextMenu}
/>
<div className="log-container">
<div>
<i className="icon dx-icon-clock"></i>
<span> Operations log:</span>
</div>
<List
id="log"
width={400}
height={300}
showScrollbar="always"
items={logItems}
/>
</div>
<ContextMenu
ref={contextMenuRef}
dataSource={menuItems}
target="#treeview .dx-treeview-item"
onItemClick={contextMenuItemClick}
/>
</div>
);
};
export default App;
import React, { useCallback, useRef, useState } from 'react';
import TreeView from 'devextreme-react/tree-view';
import ContextMenu from 'devextreme-react/context-menu';
import List from 'devextreme-react/list';
import service from './data.js';
const products = service.getProducts();
const menuItems = service.getMenuItems();
const App = () => {
const contextMenuRef = useRef(null);
const treeViewRef = useRef(null);
const [logItems, setLogItems] = useState([]);
const [selectedTreeItem, setSelectedTreeItem] = useState(undefined);
const treeViewItemContextMenu = useCallback((e) => {
setSelectedTreeItem(e.itemData);
const isProduct = e.itemData.price !== undefined;
contextMenuRef.current.instance().option('items[0].visible', !isProduct);
contextMenuRef.current.instance().option('items[1].visible', !isProduct);
contextMenuRef.current.instance().option('items[2].visible', isProduct);
contextMenuRef.current.instance().option('items[3].visible', isProduct);
contextMenuRef.current.instance().option('items[0].disabled', e.node.expanded);
contextMenuRef.current.instance().option('items[1].disabled', !e.node.expanded);
}, []);
const contextMenuItemClick = useCallback(
(e) => {
let logEntry = '';
switch (e.itemData.id) {
case 'expand': {
logEntry = `The '${selectedTreeItem.text}' group was expanded`;
treeViewRef.current.instance().expandItem(selectedTreeItem.id);
break;
}
case 'collapse': {
logEntry = `The '${selectedTreeItem.text}' group was collapsed`;
treeViewRef.current.instance().collapseItem(selectedTreeItem.id);
break;
}
case 'details': {
logEntry = `Details about '${selectedTreeItem.text}' were displayed`;
break;
}
case 'copy': {
logEntry = `Information about '${selectedTreeItem.text}' was copied`;
break;
}
default:
break;
}
const updatedLogItems = [...logItems, logEntry];
setLogItems(updatedLogItems);
},
[logItems, selectedTreeItem, setLogItems],
);
return (
<div className="form">
<TreeView
id="treeview"
ref={treeViewRef}
items={products}
width={300}
height={450}
onItemContextMenu={treeViewItemContextMenu}
/>
<div className="log-container">
<div>
<i className="icon dx-icon-clock"></i>
<span> Operations log:</span>
</div>
<List
id="log"
width={400}
height={300}
showScrollbar="always"
items={logItems}
/>
</div>
<ContextMenu
ref={contextMenuRef}
dataSource={menuItems}
target="#treeview .dx-treeview-item"
onItemClick={contextMenuItemClick}
/>
</div>
);
};
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.tsx';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
const menuItems = [
{ id: 'expand', text: 'Expand category' },
{ id: 'collapse', text: 'Collapse category' },
{ id: 'details', text: 'Show product details' },
{ id: 'copy', text: 'Copy product info' },
];
const products = [{
id: '1',
text: 'Stores',
expanded: true,
items: [{
id: '1_1',
text: 'Super Mart of the West',
expanded: true,
items: [{
id: '1_1_1',
text: 'Video Players',
items: [{
id: '1_1_1_1',
text: 'HD Video Player',
price: 220,
image: '../../../../images/products/1.png',
}, {
id: '1_1_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 270,
}],
}, {
id: '1_1_2',
text: 'Televisions',
expanded: true,
items: [{
id: '1_1_2_1',
text: 'SuperLCD 42',
image: '../../../../images/products/7.png',
price: 1200,
}, {
id: '1_1_2_2',
text: 'SuperLED 42',
image: '../../../../images/products/5.png',
price: 1450,
}, {
id: '1_1_2_3',
text: 'SuperLED 50',
image: '../../../../images/products/4.png',
price: 1600,
}, {
id: '1_1_2_4',
text: 'SuperLCD 55',
image: '../../../../images/products/6.png',
price: 1350,
}, {
id: '1_1_2_5',
text: 'SuperLCD 70',
image: '../../../../images/products/9.png',
price: 4000,
}],
}, {
id: '1_1_3',
text: 'Monitors',
expanded: true,
items: [{
id: '1_1_3_1',
text: '19"',
expanded: true,
items: [{
id: '1_1_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 160,
}],
}, {
id: '1_1_3_2',
text: '21"',
items: [{
id: '1_1_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 170,
}, {
id: '1_1_3_2_2',
text: 'DesktopLED 21',
image: '../../../../images/products/13.png',
price: 175,
}],
}],
}, {
id: '1_1_4',
text: 'Projectors',
items: [{
id: '1_1_4_1',
text: 'Projector Plus',
image: '../../../../images/products/14.png',
price: 550,
}, {
id: '1_1_4_2',
text: 'Projector PlusHD',
image: '../../../../images/products/15.png',
price: 750,
}],
}],
}, {
id: '1_2',
text: 'Braeburn',
items: [{
id: '1_2_1',
text: 'Video Players',
items: [{
id: '1_2_1_1',
text: 'HD Video Player',
image: '../../../../images/products/1.png',
price: 240,
}, {
id: '1_2_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 300,
}],
}, {
id: '1_2_2',
text: 'Televisions',
items: [{
id: '1_2_2_1',
text: 'SuperPlasma 50',
image: '../../../../images/products/3.png',
price: 1800,
}, {
id: '1_2_2_2',
text: 'SuperPlasma 65',
image: '../../../../images/products/8.png',
price: 3500,
}],
}, {
id: '1_2_3',
text: 'Monitors',
items: [{
id: '1_2_3_1',
text: '19"',
items: [{
id: '1_2_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 170,
}],
}, {
id: '1_2_3_2',
text: '21"',
items: [{
id: '1_2_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 180,
}, {
id: '1_2_3_2_2',
text: 'DesktopLED 21',
image: '../../../../images/products/13.png',
price: 190,
}],
}],
}],
}, {
id: '1_3',
text: 'E-Mart',
items: [{
id: '1_3_1',
text: 'Video Players',
items: [{
id: '1_3_1_1',
text: 'HD Video Player',
image: '../../../../images/products/1.png',
price: 220,
}, {
id: '1_3_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 275,
}],
}, {
id: '1_3_3',
text: 'Monitors',
items: [{
id: '1_3_3_1',
text: '19"',
items: [{
id: '1_3_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 165,
}],
}, {
id: '1_3_3_2',
text: '21"',
items: [{
id: '1_3_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 175,
}],
}],
}],
}, {
id: '1_4',
text: 'Walters',
items: [{
id: '1_4_1',
text: 'Video Players',
items: [{
id: '1_4_1_1',
text: 'HD Video Player',
image: '../../../../images/products/1.png',
price: 210,
}, {
id: '1_4_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 250,
}],
}, {
id: '1_4_2',
text: 'Televisions',
items: [{
id: '1_4_2_1',
text: 'SuperLCD 42',
image: '../../../../images/products/7.png',
price: 1100,
}, {
id: '1_4_2_2',
text: 'SuperLED 42',
image: '../../../../images/products/5.png',
price: 1400,
}, {
id: '1_4_2_3',
text: 'SuperLED 50',
image: '../../../../images/products/4.png',
price: 1500,
}, {
id: '1_4_2_4',
text: 'SuperLCD 55',
image: '../../../../images/products/6.png',
price: 1300,
}, {
id: '1_4_2_5',
text: 'SuperLCD 70',
image: '../../../../images/products/9.png',
price: 4000,
}, {
id: '1_4_2_6',
text: 'SuperPlasma 50',
image: '../../../../images/products/3.png',
price: 1700,
}],
}, {
id: '1_4_3',
text: 'Monitors',
items: [{
id: '1_4_3_1',
text: '19"',
items: [{
id: '1_4_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 160,
}],
}, {
id: '1_4_3_2',
text: '21"',
items: [{
id: '1_4_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 170,
}, {
id: '1_4_3_2_2',
text: 'DesktopLED 21',
image: '../../../../images/products/13.png',
price: 180,
}],
}],
}, {
id: '1_4_4',
text: 'Projectors',
items: [{
id: '1_4_4_1',
text: 'Projector Plus',
image: '../../../../images/products/14.png',
price: 550,
}, {
id: '1_4_4_2',
text: 'Projector PlusHD',
image: '../../../../images/products/15.png',
price: 750,
}],
}],
}],
}];
export default {
getProducts() {
return products;
},
getMenuItems() {
return menuItems;
},
};
window.exports = window.exports || {};
window.config = {
transpiler: 'ts',
typescriptOptions: {
module: 'system',
emitDecoratorMetadata: true,
experimentalDecorators: true,
jsx: 'react',
},
meta: {
'react': {
'esModule': true,
},
'typescript': {
'exports': 'ts',
},
'devextreme/time_zone_utils.js': {
'esModule': true,
},
'devextreme/localization.js': {
'esModule': true,
},
'devextreme/viz/palette.js': {
'esModule': true,
},
'openai': {
'esModule': true,
},
},
paths: {
'npm:': 'https://cdn.jsdelivr.net/npm/',
'bundles:': '../../../../bundles/',
'externals:': '../../../../bundles/externals/',
},
defaultExtension: 'js',
map: {
'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js',
'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/prop-types.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@3.4.4/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign',
'devextreme': 'npm:devextreme@link:../../packages/devextreme/artifacts/npm/devextreme/cjs',
'devextreme-react': 'npm:devextreme-react@link:../../packages/devextreme-react/npm/cjs',
'devextreme-quill': 'npm:devextreme-quill@1.7.6/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.24/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.64/dist/dx-gantt.js',
'inferno': 'npm:inferno@8.2.3/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@8.2.3/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate/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',
'@preact/signals-core': 'npm:@preact/signals-core@1.8.0/dist/signals-core.min.js',
'devextreme-cldr-data': 'npm:devextreme-cldr-data@1.0.3',
// 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@2.8.8/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js',
},
packages: {
'devextreme': {
defaultExtension: 'js',
},
'devextreme-react': {
main: 'index.js',
},
'devextreme-react/common': {
main: 'index.js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/common/core/events/utils': {
main: 'index',
},
'devextreme/localization/messages': {
format: 'json',
defaultExtension: 'json',
},
'devextreme/events': {
main: 'index',
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true,
},
};
System.config(window.config);
// eslint-disable-next-line
const useTgzInCSB = ['openai'];
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(<App />, document.getElementById('app'));
const menuItems = [
{ id: 'expand', text: 'Expand category' },
{ id: 'collapse', text: 'Collapse category' },
{ id: 'details', text: 'Show product details' },
{ id: 'copy', text: 'Copy product info' },
];
const products = [
{
id: '1',
text: 'Stores',
expanded: true,
items: [
{
id: '1_1',
text: 'Super Mart of the West',
expanded: true,
items: [
{
id: '1_1_1',
text: 'Video Players',
items: [
{
id: '1_1_1_1',
text: 'HD Video Player',
price: 220,
image: '../../../../images/products/1.png',
},
{
id: '1_1_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 270,
},
],
},
{
id: '1_1_2',
text: 'Televisions',
expanded: true,
items: [
{
id: '1_1_2_1',
text: 'SuperLCD 42',
image: '../../../../images/products/7.png',
price: 1200,
},
{
id: '1_1_2_2',
text: 'SuperLED 42',
image: '../../../../images/products/5.png',
price: 1450,
},
{
id: '1_1_2_3',
text: 'SuperLED 50',
image: '../../../../images/products/4.png',
price: 1600,
},
{
id: '1_1_2_4',
text: 'SuperLCD 55',
image: '../../../../images/products/6.png',
price: 1350,
},
{
id: '1_1_2_5',
text: 'SuperLCD 70',
image: '../../../../images/products/9.png',
price: 4000,
},
],
},
{
id: '1_1_3',
text: 'Monitors',
expanded: true,
items: [
{
id: '1_1_3_1',
text: '19"',
expanded: true,
items: [
{
id: '1_1_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 160,
},
],
},
{
id: '1_1_3_2',
text: '21"',
items: [
{
id: '1_1_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 170,
},
{
id: '1_1_3_2_2',
text: 'DesktopLED 21',
image: '../../../../images/products/13.png',
price: 175,
},
],
},
],
},
{
id: '1_1_4',
text: 'Projectors',
items: [
{
id: '1_1_4_1',
text: 'Projector Plus',
image: '../../../../images/products/14.png',
price: 550,
},
{
id: '1_1_4_2',
text: 'Projector PlusHD',
image: '../../../../images/products/15.png',
price: 750,
},
],
},
],
},
{
id: '1_2',
text: 'Braeburn',
items: [
{
id: '1_2_1',
text: 'Video Players',
items: [
{
id: '1_2_1_1',
text: 'HD Video Player',
image: '../../../../images/products/1.png',
price: 240,
},
{
id: '1_2_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 300,
},
],
},
{
id: '1_2_2',
text: 'Televisions',
items: [
{
id: '1_2_2_1',
text: 'SuperPlasma 50',
image: '../../../../images/products/3.png',
price: 1800,
},
{
id: '1_2_2_2',
text: 'SuperPlasma 65',
image: '../../../../images/products/8.png',
price: 3500,
},
],
},
{
id: '1_2_3',
text: 'Monitors',
items: [
{
id: '1_2_3_1',
text: '19"',
items: [
{
id: '1_2_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 170,
},
],
},
{
id: '1_2_3_2',
text: '21"',
items: [
{
id: '1_2_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 180,
},
{
id: '1_2_3_2_2',
text: 'DesktopLED 21',
image: '../../../../images/products/13.png',
price: 190,
},
],
},
],
},
],
},
{
id: '1_3',
text: 'E-Mart',
items: [
{
id: '1_3_1',
text: 'Video Players',
items: [
{
id: '1_3_1_1',
text: 'HD Video Player',
image: '../../../../images/products/1.png',
price: 220,
},
{
id: '1_3_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 275,
},
],
},
{
id: '1_3_3',
text: 'Monitors',
items: [
{
id: '1_3_3_1',
text: '19"',
items: [
{
id: '1_3_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 165,
},
],
},
{
id: '1_3_3_2',
text: '21"',
items: [
{
id: '1_3_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 175,
},
],
},
],
},
],
},
{
id: '1_4',
text: 'Walters',
items: [
{
id: '1_4_1',
text: 'Video Players',
items: [
{
id: '1_4_1_1',
text: 'HD Video Player',
image: '../../../../images/products/1.png',
price: 210,
},
{
id: '1_4_1_2',
text: 'SuperHD Video Player',
image: '../../../../images/products/2.png',
price: 250,
},
],
},
{
id: '1_4_2',
text: 'Televisions',
items: [
{
id: '1_4_2_1',
text: 'SuperLCD 42',
image: '../../../../images/products/7.png',
price: 1100,
},
{
id: '1_4_2_2',
text: 'SuperLED 42',
image: '../../../../images/products/5.png',
price: 1400,
},
{
id: '1_4_2_3',
text: 'SuperLED 50',
image: '../../../../images/products/4.png',
price: 1500,
},
{
id: '1_4_2_4',
text: 'SuperLCD 55',
image: '../../../../images/products/6.png',
price: 1300,
},
{
id: '1_4_2_5',
text: 'SuperLCD 70',
image: '../../../../images/products/9.png',
price: 4000,
},
{
id: '1_4_2_6',
text: 'SuperPlasma 50',
image: '../../../../images/products/3.png',
price: 1700,
},
],
},
{
id: '1_4_3',
text: 'Monitors',
items: [
{
id: '1_4_3_1',
text: '19"',
items: [
{
id: '1_4_3_1_1',
text: 'DesktopLCD 19',
image: '../../../../images/products/10.png',
price: 160,
},
],
},
{
id: '1_4_3_2',
text: '21"',
items: [
{
id: '1_4_3_2_1',
text: 'DesktopLCD 21',
image: '../../../../images/products/12.png',
price: 170,
},
{
id: '1_4_3_2_2',
text: 'DesktopLED 21',
image: '../../../../images/products/13.png',
price: 180,
},
],
},
],
},
{
id: '1_4_4',
text: 'Projectors',
items: [
{
id: '1_4_4_1',
text: 'Projector Plus',
image: '../../../../images/products/14.png',
price: 550,
},
{
id: '1_4_4_2',
text: 'Projector PlusHD',
image: '../../../../images/products/15.png',
price: 750,
},
],
},
],
},
],
},
];
export default {
getProducts() {
return products;
},
getMenuItems() {
return menuItems;
},
};
<!DOCTYPE html>
<html lang="en">
<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=5.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/25.1.6/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import("./index.tsx");
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
.form {
display: flex;
}
.form > div,
#treeview {
display: inline-block;
vertical-align: top;
}
.log-container {
padding: 20px;
margin-left: 20px;
font-weight: 600;
background-color: rgba(191, 191, 191, 0.15);
}
.log-container > div:first-child {
display: flex;
align-items: center;
margin-bottom: 10px;
}
.log-container .dx-icon-clock {
font-size: var(--dx-font-size-icon);
}
#log .dx-empty-message {
padding-left: 0;
}
.dx-list-item-content {
padding-left: 0;
}