<template>
<div class="form">
<div class="drive-panel">
<div class="drive-header dx-treeview-item"><div class="dx-treeview-item-content"><i class="dx-icon dx-icon-activefolder"/><span>Drive C:</span></div></div>
<DxSortable
filter=".dx-treeview-item"
group="shared"
data="driveC"
:allow-drop-inside-item="true"
:allow-reordering="true"
@drag-change="onDragChange"
@drag-end="onDragEnd"
>
<DxTreeView
id="treeviewDriveC"
data-structure="plain"
:expand-nodes-recursive="false"
:ref="treeViewDriveCRef"
:items="itemsDriveC"
:width="250"
:height="380"
display-expr="name"
>
</DxTreeView>
</DxSortable>
</div>
<div class="drive-panel">
<div class="drive-header dx-treeview-item"><div class="dx-treeview-item-content"><i class="dx-icon dx-icon-activefolder"/><span>Drive D:</span></div></div>
<DxSortable
filter=".dx-treeview-item"
group="shared"
data="driveD"
:allow-drop-inside-item="true"
:allow-reordering="true"
@drag-change="onDragChange"
@drag-end="onDragEnd"
>
<DxTreeView
id="treeviewDriveD"
data-structure="plain"
:expand-nodes-recursive="false"
:ref="treeViewDriveDRef"
:items="itemsDriveD"
:width="250"
:height="380"
display-expr="name"
>
</DxTreeView>
</DxSortable>
</div>
</div>
</template>
<script>
import DxTreeView from 'devextreme-vue/tree-view';
import DxSortable from 'devextreme-vue/sortable';
import service from './data.js';
const treeViewDriveCRef = 'treeViewDriveC';
const treeViewDriveDRef = 'treeViewDriveD';
export default {
components: {
DxTreeView, DxSortable
},
data() {
return {
itemsDriveC: service.getItemsDriveC(),
itemsDriveD: service.getItemsDriveD(),
treeViewDriveCRef,
treeViewDriveDRef
};
},
computed: {
treeViewDriveC: function() {
return this.$refs[treeViewDriveCRef].instance;
},
treeViewDriveD: function() {
return this.$refs[treeViewDriveDRef].instance;
}
},
methods: {
onDragChange(e) {
if(e.fromComponent === e.toComponent) {
const fromNode = this.findNode(this.getTreeView(e.fromData), e.fromIndex);
const toNode = this.findNode(this.getTreeView(e.toData), this.calculateToIndex(e));
if (toNode !== null && this.isChildNode(fromNode, toNode)) {
e.cancel = true;
}
}
},
onDragEnd(e) {
if(e.fromComponent === e.toComponent && e.fromIndex === e.toIndex) {
return;
}
const fromTreeView = this.getTreeView(e.fromData);
const toTreeView = this.getTreeView(e.toData);
const fromNode = this.findNode(fromTreeView, e.fromIndex);
const toNode = this.findNode(toTreeView, this.calculateToIndex(e));
if(e.dropInsideItem && toNode !== null && !toNode.itemData.isDirectory) {
return;
}
const fromTopVisibleNode = this.getTopVisibleNode(e.fromComponent);
const toTopVisibleNode = this.getTopVisibleNode(e.toComponent);
const fromItems = this.getItems(e.fromData);
const toItems = this.getItems(e.toData);
this.moveNode(fromNode, toNode, fromItems, toItems, e.dropInsideItem);
this.itemsDriveC = [].concat(this.itemsDriveC);
this.itemsDriveD = [].concat(this.itemsDriveD);
this.$root.$nextTick(() => {
fromTreeView.scrollToItem(fromTopVisibleNode);
toTreeView.scrollToItem(toTopVisibleNode);
});
},
getTreeView(driveName) {
return driveName === 'driveC'
? this.treeViewDriveC
: this.treeViewDriveD;
},
getItems(driveName) {
return driveName === 'driveC'
? this.itemsDriveC
: this.itemsDriveD;
},
calculateToIndex(e) {
if(e.fromComponent != e.toComponent || e.dropInsideItem) {
return e.toIndex;
}
return e.fromIndex >= e.toIndex
? e.toIndex
: e.toIndex + 1;
},
findNode(treeView, index) {
const nodeElement = treeView.element().querySelectorAll('.dx-treeview-node')[index];
if(nodeElement) {
return this.findNodeById(treeView.getNodes(), nodeElement.getAttribute('data-item-id'));
}
return null;
},
findNodeById(nodes, id) {
for(var i = 0; i < nodes.length; i++) {
if(nodes[i].itemData.id == id) {
return nodes[i];
}
if(nodes[i].children) {
const node = this.findNodeById(nodes[i].children, id);
if(node != null) {
return node;
}
}
}
return null;
},
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);
this.moveChildren(fromNode, fromItems, toItems);
if(isDropInsideItem) {
fromNode.itemData.parentId = toNode.itemData.id;
} else {
fromNode.itemData.parentId = toNode != null
? toNode.itemData.parentId
: undefined;
}
},
moveChildren(node, fromDataSource, toDataSource) {
if(!node.itemData.isDirectory) {
return;
}
node.children.forEach(child => {
if(child.itemData.isDirectory) {
this.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);
});
},
isChildNode(parentNode, childNode) {
let parent = childNode.parent;
while(parent !== null) {
if(parent.itemData.id === parentNode.itemData.id) {
return true;
}
parent = parent.parent;
}
return false;
},
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++) {
const nodeTopPosition = nodes[i].getBoundingClientRect().top;
if(nodeTopPosition >= treeViewTopPosition) {
return nodes[i];
}
}
return null;
}
}
};
</script>
<style scoped>
.form {
display: flex;
}
.form>div {
display: inline-block;
vertical-align: top;
}
#treeviewDriveC,
#treeviewDriveD {
margin-top: 10px;
}
.drive-header {
min-height: auto;
padding: 0px;
cursor: default;
}
.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;
}
</style>
import { createApp } from 'vue';
import App from './App.vue';
createApp(App).mount('#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/20.2.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/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>
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;
}
};
System.config({
transpiler: 'plugin-babel',
meta: {
'*.vue': {
loader: 'vue-loader'
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
'vue': 'npm:vue@3.0.0/dist/vue.esm-browser.js',
'vue-loader': 'npm:dx-systemjs-vue-browser@1.0.15/index.js',
'mitt': 'npm:mitt/dist/mitt.umd.js',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.4',
'devextreme-vue': 'npm:devextreme-vue@20.2.4',
'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.9.7/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.5/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.8/dist/dx-gantt.js',
'preact': 'npm:preact@10.5.7/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.7/hooks/dist/hooks.js',
'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'
},
packages: {
'devextreme-vue': {
main: 'index.js'
},
'devextreme': {
defaultExtension: 'js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
babelOptions: {
sourceMaps: false,
stage0: true
}
});