import React, { useCallback, useRef, useState } from 'react';
import TreeView, { TreeViewRef } from 'devextreme-react/tree-view';
import Sortable, { SortableTypes } from 'devextreme-react/sortable';
import service from './data.ts';
const getStateFieldName = (driveName: string) => (driveName === 'driveC'
? 'itemsDriveC'
: 'itemsDriveD');
const calculateToIndex = (e: SortableTypes.DragChangeEvent) => {
if (e.fromComponent !== e.toComponent || e.dropInsideItem) {
return e.toIndex;
}
return e.fromIndex >= e.toIndex
? e.toIndex
: e.toIndex + 1;
};
const findNode = (treeView, index: string | number) => {
const nodeElement = treeView.element().querySelectorAll('.dx-treeview-node')[index];
if (nodeElement) {
return findNodeById(treeView.getNodes(), nodeElement.getAttribute('data-item-id'));
}
return null;
};
const findNodeById = (nodes, id) => {
for (let i = 0; i < nodes.length; i += 1) {
if (nodes[i].itemData.id === id) {
return nodes[i];
}
if (nodes[i].children) {
const node = findNodeById(nodes[i].children, id);
if (node != null) {
return node;
}
}
}
return null;
};
const moveNode = (fromNode, toNode, fromItems, toItems, isDropInsideItem) => {
const fromIndex = fromItems.findIndex((item) => item.id === fromNode.itemData.id);
fromItems.splice(fromIndex, 1);
const toIndex = toNode === null || isDropInsideItem
? toItems.length
: toItems.findIndex((item) => item.id === toNode.itemData.id);
toItems.splice(toIndex, 0, fromNode.itemData);
moveChildren(fromNode, fromItems, toItems);
if (isDropInsideItem) {
fromNode.itemData.parentId = toNode.itemData.id;
} else {
fromNode.itemData.parentId = toNode != null
? toNode.itemData.parentId
: undefined;
}
};
const moveChildren = (node, fromDataSource, toDataSource: any[]) => {
if (!node.itemData.isDirectory) {
return;
}
node.children.forEach((child) => {
if (child.itemData.isDirectory) {
moveChildren(child, fromDataSource, toDataSource);
}
const fromIndex = fromDataSource.findIndex((item) => item.id === child.itemData.id);
fromDataSource.splice(fromIndex, 1);
toDataSource.splice(toDataSource.length, 0, child.itemData);
});
};
const isChildNode = (parentNode: { itemData: { id: any; }; }, childNode: { parent: any; }) => {
let { parent } = childNode;
while (parent !== null) {
if (parent.itemData.id === parentNode.itemData.id) {
return true;
}
parent = parent.parent;
}
return false;
};
const getTopVisibleNode = (component) => {
const treeViewElement = component.element();
const treeViewTopPosition = treeViewElement.getBoundingClientRect().top;
const nodes = treeViewElement.querySelectorAll('.dx-treeview-node');
for (let i = 0; i < nodes.length; i += 1) {
const nodeTopPosition = nodes[i].getBoundingClientRect().top;
if (nodeTopPosition >= treeViewTopPosition) {
return nodes[i];
}
}
return null;
};
const App = () => {
const treeViewDriveCRef = useRef<TreeViewRef>(null);
const treeViewDriveDRef = useRef<TreeViewRef>(null);
const [itemsDriveC, setItemsDriveC] = useState(service.getItemsDriveC());
const [itemsDriveD, setItemsDriveD] = useState(service.getItemsDriveD());
const getTreeView = useCallback((driveName: string) => (driveName === 'driveC'
? treeViewDriveCRef.current.instance()
: treeViewDriveDRef.current.instance()), []);
const onDragChange = useCallback((e: SortableTypes.DragChangeEvent) => {
if (e.fromComponent === e.toComponent) {
const fromNode = findNode(getTreeView(e.fromData), e.fromIndex);
const toNode = findNode(getTreeView(e.toData), calculateToIndex(e));
if (toNode !== null && isChildNode(fromNode, toNode)) {
e.cancel = true;
}
}
}, [getTreeView]);
const onDragEnd = useCallback((e: SortableTypes.DragEndEvent) => {
if (e.fromComponent === e.toComponent && e.fromIndex === e.toIndex) {
return;
}
const fromTreeView = getTreeView(e.fromData);
const toTreeView = getTreeView(e.toData);
const fromNode = findNode(fromTreeView, e.fromIndex);
const toNode = findNode(toTreeView, calculateToIndex(e));
if (e.dropInsideItem && toNode !== null && !toNode.itemData.isDirectory) {
return;
}
const fromTopVisibleNode = getTopVisibleNode(e.fromComponent);
const toTopVisibleNode = getTopVisibleNode(e.toComponent);
const fromItems = getStateFieldName(e.fromData) === 'itemsDriveC'
? itemsDriveC
: itemsDriveD;
const toItems = getStateFieldName(e.toData) === 'itemsDriveC'
? itemsDriveC
: itemsDriveD;
moveNode(fromNode, toNode, fromItems, toItems, e.dropInsideItem);
if (getStateFieldName(e.fromData) === 'itemsDriveC') {
setItemsDriveC([...fromItems]);
} else {
setItemsDriveD([...fromItems]);
}
if (getStateFieldName(e.toData) === 'itemsDriveC') {
setItemsDriveC([...toItems]);
} else {
setItemsDriveD([...toItems]);
}
fromTreeView.scrollToItem(fromTopVisibleNode);
toTreeView.scrollToItem(toTopVisibleNode);
}, [getTreeView, itemsDriveC, itemsDriveD, setItemsDriveC, setItemsDriveD]);
return (
<div className="form">
<div className="drive-panel">
<div className="drive-header dx-treeview-item"><div className="dx-treeview-item-content"><i className="dx-icon dx-icon-activefolder"></i><span>Drive C:</span></div></div>
<Sortable
filter=".dx-treeview-item"
group="shared"
data="driveC"
allowDropInsideItem={true}
allowReordering={true}
onDragChange={onDragChange}
onDragEnd={onDragEnd}
>
<TreeView
id="treeviewDriveC"
expandNodesRecursive={false}
dataStructure="plain"
ref={treeViewDriveCRef}
items={itemsDriveC}
width={250}
height={380}
displayExpr="name"
/>
</Sortable>
</div>
<div className="drive-panel">
<div className="drive-header dx-treeview-item"><div className="dx-treeview-item-content"><i className="dx-icon dx-icon-activefolder"></i><span>Drive D:</span></div></div>
<Sortable
filter=".dx-treeview-item"
group="shared"
data="driveD"
allowDropInsideItem={true}
allowReordering={true}
onDragChange={onDragChange}
onDragEnd={onDragEnd}
>
<TreeView
id="treeviewDriveD"
expandNodesRecursive={false}
dataStructure="plain"
ref={treeViewDriveDRef}
items={itemsDriveD}
width={250}
height={380}
displayExpr="name"
/>
</Sortable>
</div>
</div>
);
};
export default App;
import React, { useCallback, useRef, useState } from 'react';
import TreeView from 'devextreme-react/tree-view';
import Sortable from 'devextreme-react/sortable';
import service from './data.js';
const getStateFieldName = (driveName) => (driveName === 'driveC' ? 'itemsDriveC' : 'itemsDriveD');
const calculateToIndex = (e) => {
if (e.fromComponent !== e.toComponent || e.dropInsideItem) {
return e.toIndex;
}
return e.fromIndex >= e.toIndex ? e.toIndex : e.toIndex + 1;
};
const findNode = (treeView, index) => {
const nodeElement = treeView.element().querySelectorAll('.dx-treeview-node')[index];
if (nodeElement) {
return findNodeById(treeView.getNodes(), nodeElement.getAttribute('data-item-id'));
}
return null;
};
const findNodeById = (nodes, id) => {
for (let i = 0; i < nodes.length; i += 1) {
if (nodes[i].itemData.id === id) {
return nodes[i];
}
if (nodes[i].children) {
const node = findNodeById(nodes[i].children, id);
if (node != null) {
return node;
}
}
}
return null;
};
const moveNode = (fromNode, toNode, fromItems, toItems, isDropInsideItem) => {
const fromIndex = fromItems.findIndex((item) => item.id === fromNode.itemData.id);
fromItems.splice(fromIndex, 1);
const toIndex = toNode === null || isDropInsideItem
? toItems.length
: toItems.findIndex((item) => item.id === toNode.itemData.id);
toItems.splice(toIndex, 0, fromNode.itemData);
moveChildren(fromNode, fromItems, toItems);
if (isDropInsideItem) {
fromNode.itemData.parentId = toNode.itemData.id;
} else {
fromNode.itemData.parentId = toNode != null ? toNode.itemData.parentId : undefined;
}
};
const moveChildren = (node, fromDataSource, toDataSource) => {
if (!node.itemData.isDirectory) {
return;
}
node.children.forEach((child) => {
if (child.itemData.isDirectory) {
moveChildren(child, fromDataSource, toDataSource);
}
const fromIndex = fromDataSource.findIndex((item) => item.id === child.itemData.id);
fromDataSource.splice(fromIndex, 1);
toDataSource.splice(toDataSource.length, 0, child.itemData);
});
};
const isChildNode = (parentNode, childNode) => {
let { parent } = childNode;
while (parent !== null) {
if (parent.itemData.id === parentNode.itemData.id) {
return true;
}
parent = parent.parent;
}
return false;
};
const getTopVisibleNode = (component) => {
const treeViewElement = component.element();
const treeViewTopPosition = treeViewElement.getBoundingClientRect().top;
const nodes = treeViewElement.querySelectorAll('.dx-treeview-node');
for (let i = 0; i < nodes.length; i += 1) {
const nodeTopPosition = nodes[i].getBoundingClientRect().top;
if (nodeTopPosition >= treeViewTopPosition) {
return nodes[i];
}
}
return null;
};
const App = () => {
const treeViewDriveCRef = useRef(null);
const treeViewDriveDRef = useRef(null);
const [itemsDriveC, setItemsDriveC] = useState(service.getItemsDriveC());
const [itemsDriveD, setItemsDriveD] = useState(service.getItemsDriveD());
const getTreeView = useCallback(
(driveName) =>
(driveName === 'driveC'
? treeViewDriveCRef.current.instance()
: treeViewDriveDRef.current.instance()),
[],
);
const onDragChange = useCallback(
(e) => {
if (e.fromComponent === e.toComponent) {
const fromNode = findNode(getTreeView(e.fromData), e.fromIndex);
const toNode = findNode(getTreeView(e.toData), calculateToIndex(e));
if (toNode !== null && isChildNode(fromNode, toNode)) {
e.cancel = true;
}
}
},
[getTreeView],
);
const onDragEnd = useCallback(
(e) => {
if (e.fromComponent === e.toComponent && e.fromIndex === e.toIndex) {
return;
}
const fromTreeView = getTreeView(e.fromData);
const toTreeView = getTreeView(e.toData);
const fromNode = findNode(fromTreeView, e.fromIndex);
const toNode = findNode(toTreeView, calculateToIndex(e));
if (e.dropInsideItem && toNode !== null && !toNode.itemData.isDirectory) {
return;
}
const fromTopVisibleNode = getTopVisibleNode(e.fromComponent);
const toTopVisibleNode = getTopVisibleNode(e.toComponent);
const fromItems = getStateFieldName(e.fromData) === 'itemsDriveC' ? itemsDriveC : itemsDriveD;
const toItems = getStateFieldName(e.toData) === 'itemsDriveC' ? itemsDriveC : itemsDriveD;
moveNode(fromNode, toNode, fromItems, toItems, e.dropInsideItem);
if (getStateFieldName(e.fromData) === 'itemsDriveC') {
setItemsDriveC([...fromItems]);
} else {
setItemsDriveD([...fromItems]);
}
if (getStateFieldName(e.toData) === 'itemsDriveC') {
setItemsDriveC([...toItems]);
} else {
setItemsDriveD([...toItems]);
}
fromTreeView.scrollToItem(fromTopVisibleNode);
toTreeView.scrollToItem(toTopVisibleNode);
},
[getTreeView, itemsDriveC, itemsDriveD, setItemsDriveC, setItemsDriveD],
);
return (
<div className="form">
<div className="drive-panel">
<div className="drive-header dx-treeview-item">
<div className="dx-treeview-item-content">
<i className="dx-icon dx-icon-activefolder"></i>
<span>Drive C:</span>
</div>
</div>
<Sortable
filter=".dx-treeview-item"
group="shared"
data="driveC"
allowDropInsideItem={true}
allowReordering={true}
onDragChange={onDragChange}
onDragEnd={onDragEnd}
>
<TreeView
id="treeviewDriveC"
expandNodesRecursive={false}
dataStructure="plain"
ref={treeViewDriveCRef}
items={itemsDriveC}
width={250}
height={380}
displayExpr="name"
/>
</Sortable>
</div>
<div className="drive-panel">
<div className="drive-header dx-treeview-item">
<div className="dx-treeview-item-content">
<i className="dx-icon dx-icon-activefolder"></i>
<span>Drive D:</span>
</div>
</div>
<Sortable
filter=".dx-treeview-item"
group="shared"
data="driveD"
allowDropInsideItem={true}
allowReordering={true}
onDragChange={onDragChange}
onDragEnd={onDragEnd}
>
<TreeView
id="treeviewDriveD"
expandNodesRecursive={false}
dataStructure="plain"
ref={treeViewDriveDRef}
items={itemsDriveD}
width={250}
height={380}
displayExpr="name"
/>
</Sortable>
</div>
</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 itemsDriveD = [];
const itemsDriveC = [{
id: '1',
name: 'Documents',
icon: 'activefolder',
isDirectory: true,
expanded: true,
}, {
id: '2',
parentId: '1',
name: 'Projects',
icon: 'activefolder',
isDirectory: true,
expanded: true,
}, {
id: '3',
parentId: '2',
name: 'About.rtf',
icon: 'file',
isDirectory: false,
expanded: true,
}, {
id: '4',
parentId: '2',
name: 'Passwords.rtf',
icon: 'file',
isDirectory: false,
expanded: true,
}, {
id: '5',
parentId: '2',
name: 'About.xml',
icon: 'file',
isDirectory: false,
expanded: true,
}, {
id: '6',
parentId: '2',
name: 'Managers.rtf',
icon: 'file',
isDirectory: false,
expanded: true,
}, {
id: '7',
parentId: '2',
name: 'ToDo.txt',
icon: 'file',
isDirectory: false,
expanded: true,
}, {
id: '8',
name: 'Images',
icon: 'activefolder',
isDirectory: true,
expanded: true,
}, {
id: '9',
parentId: '8',
name: 'logo.png',
icon: 'file',
isDirectory: false,
expanded: true,
}, {
id: '10',
parentId: '8',
name: 'banner.gif',
icon: 'file',
isDirectory: false,
expanded: true,
}, {
id: '11',
name: 'System',
icon: 'activefolder',
isDirectory: true,
expanded: true,
}, {
id: '12',
parentId: '11',
name: 'Employees.txt',
icon: 'file',
isDirectory: false,
expanded: true,
}, {
id: '13',
parentId: '11',
name: 'PasswordList.txt',
icon: 'file',
isDirectory: false,
expanded: true,
}, {
id: '14',
name: 'Description.rtf',
icon: 'file',
isDirectory: false,
expanded: true,
}, {
id: '15',
name: 'Description.txt',
icon: 'file',
isDirectory: false,
expanded: true,
}];
export default {
getItemsDriveC() {
return itemsDriveC;
},
getItemsDriveD() {
return itemsDriveD;
},
};
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,
},
},
paths: {
'npm:': 'https://unpkg.com/',
},
defaultExtension: 'js',
map: {
'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.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@15.8.1/prop-types.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@24.1.7/cjs',
'devextreme-react': 'npm:devextreme-react@24.1.7/cjs',
'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.12/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.56/dist/dx-gantt.js',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13',
'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',
'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/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',
'npm:@devextreme/runtime@3.0.13/inferno/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true,
},
};
System.config(window.config);
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(<App />, document.getElementById('app'));
const itemsDriveD = [];
const itemsDriveC = [
{
id: '1',
name: 'Documents',
icon: 'activefolder',
isDirectory: true,
expanded: true,
},
{
id: '2',
parentId: '1',
name: 'Projects',
icon: 'activefolder',
isDirectory: true,
expanded: true,
},
{
id: '3',
parentId: '2',
name: 'About.rtf',
icon: 'file',
isDirectory: false,
expanded: true,
},
{
id: '4',
parentId: '2',
name: 'Passwords.rtf',
icon: 'file',
isDirectory: false,
expanded: true,
},
{
id: '5',
parentId: '2',
name: 'About.xml',
icon: 'file',
isDirectory: false,
expanded: true,
},
{
id: '6',
parentId: '2',
name: 'Managers.rtf',
icon: 'file',
isDirectory: false,
expanded: true,
},
{
id: '7',
parentId: '2',
name: 'ToDo.txt',
icon: 'file',
isDirectory: false,
expanded: true,
},
{
id: '8',
name: 'Images',
icon: 'activefolder',
isDirectory: true,
expanded: true,
},
{
id: '9',
parentId: '8',
name: 'logo.png',
icon: 'file',
isDirectory: false,
expanded: true,
},
{
id: '10',
parentId: '8',
name: 'banner.gif',
icon: 'file',
isDirectory: false,
expanded: true,
},
{
id: '11',
name: 'System',
icon: 'activefolder',
isDirectory: true,
expanded: true,
},
{
id: '12',
parentId: '11',
name: 'Employees.txt',
icon: 'file',
isDirectory: false,
expanded: true,
},
{
id: '13',
parentId: '11',
name: 'PasswordList.txt',
icon: 'file',
isDirectory: false,
expanded: true,
},
{
id: '14',
name: 'Description.rtf',
icon: 'file',
isDirectory: false,
expanded: true,
},
{
id: '15',
name: 'Description.txt',
icon: 'file',
isDirectory: false,
expanded: true,
},
];
export default {
getItemsDriveC() {
return itemsDriveC;
},
getItemsDriveD() {
return itemsDriveD;
},
};
<!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/24.1.7/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.tsx");
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
.form {
display: flex;
}
.form > div {
display: inline-block;
vertical-align: top;
}
.dx-treeview-item {
box-sizing: border-box;
}
.drive-header {
min-height: auto;
padding: 0;
cursor: default;
margin-bottom: 10px;
}
.drive-panel {
padding: 20px 30px;
font-size: 115%;
font-weight: bold;
border-right: 1px solid rgba(165, 165, 165, 0.4);
height: 100%;
}
.drive-panel:last-of-type {
border-right: none;
}