<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"></i><span>Drive C:</span></div></div>
<dx-sortable
filter=".dx-treeview-item"
group="shared"
data="driveC"
[allowDropInsideItem]="true"
[allowReordering]="true"
(onDragChange)="onDragChange($event)"
(onDragEnd)="onDragEnd($event)">
<dx-tree-view #treeviewDriveC
id="treeviewDriveC"
dataStructure="plain"
displayExpr="name"
[expandNodesRecursive]="false"
[items]="itemsDriveC"
[width]="250"
[height]="380">
</dx-tree-view>
</dx-sortable>
</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"></i><span>Drive D:</span></div></div>
<dx-sortable
filter=".dx-treeview-item"
group="shared"
data="driveD"
[allowDropInsideItem]="true"
[allowReordering]="true"
(onDragChange)="onDragChange($event)"
(onDragEnd)="onDragEnd($event)">
<dx-tree-view #treeviewDriveD
id="treeviewDriveD"
dataStructure="plain"
displayExpr="name"
[expandNodesRecursive]="false"
[items]="itemsDriveD"
[width]="250"
[height]="380">
</dx-tree-view>
</dx-sortable>
</div>
</div>
import { NgModule, Component, enableProdMode, ViewChild } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { DxTreeViewModule, DxTreeViewComponent, DxSortableModule } from 'devextreme-angular';
import { Service, FileSystemItem } from './app.service';
if(!/localhost/.test(document.location.host)) {
enableProdMode();
}
@Component({
selector: 'demo-app',
templateUrl: 'app/app.component.html',
styleUrls: ['app/app.component.css'],
providers: [Service]
})
export class AppComponent {
@ViewChild('treeviewDriveC') treeviewDriveC: DxTreeViewComponent;
@ViewChild('treeviewDriveD') treeviewDriveD: DxTreeViewComponent;
itemsDriveC: FileSystemItem[];
itemsDriveD: FileSystemItem[];
constructor(service: Service) {
this.itemsDriveC = service.getItemsDriveC();
this.itemsDriveD = service.getItemsDriveD();
}
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 = fromTreeView.option('items');
const toItems = toTreeView.option('items');
this.moveNode(fromNode, toNode, fromItems, toItems, e.dropInsideItem);
fromTreeView.option('items', fromItems);
toTreeView.option('items', toItems);
fromTreeView.scrollToItem(fromTopVisibleNode);
toTreeView.scrollToItem(toTopVisibleNode);
}
getTreeView(driveName) {
return driveName === 'driveC'
? this.treeviewDriveC.instance
: this.treeviewDriveD.instance;
}
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;
}
}
@NgModule({
imports: [
BrowserModule,
DxTreeViewModule,
DxSortableModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule { }
platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep .form {
display: flex;
}
::ng-deep .form>div {
display: inline-block;
vertical-align: top;
}
::ng-deep #treeviewDriveC,
::ng-deep #treeviewDriveD {
margin-top: 10px;
}
::ng-deep .drive-header {
min-height: auto;
padding: 0px;
cursor: default;
}
::ng-deep .drive-panel {
padding: 20px 30px;
font-size: 115%;
font-weight: bold;
border-right: 1px solid rgba(165, 165, 165, 0.4);
height: 100%;
}
::ng-deep .drive-panel:last-of-type {
border-right: none;
}
import { Injectable } from '@angular/core';
export class FileSystemItem {
id: string;
parentId?: string;
name: string;
icon: string;
isDirectory: boolean;
expanded?: boolean;
}
const itemsDriveD: FileSystemItem[] = [];
const itemsDriveC: FileSystemItem[] = [{
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',
isDirectory: true,
icon: 'activefolder',
expanded: true
}, {
id: '9',
parentId: '8',
name: 'logo.png',
isDirectory: false,
icon: 'file',
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
}];
@Injectable()
export class Service {
getItemsDriveC(): FileSystemItem[] {
return itemsDriveC;
}
getItemsDriveD(): FileSystemItem[] {
return itemsDriveD;
}
}
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here:
// https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/
System.config({
transpiler: 'ts',
typescriptOptions: {
module: "system",
emitDecoratorMetadata: true,
experimentalDecorators: true
},
meta: {
'typescript': {
"exports": "ts"
},
'devextreme/localization.js': {
"esModule": true
}
},
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',
'typescript': 'npm:typescript@3.5.3/lib/typescript.js',
'@angular': 'npm:@angular',
'tslib': 'npm:tslib@2.1.0/tslib.js',
'rxjs': 'npm:rxjs@6.4.0',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.26.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.6',
'jszip': 'npm:jszip@3.6.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.10.3/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.18',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.24',
'devextreme-angular': 'npm:devextreme-angular@20.2.6',
'preact': 'npm:preact@10.5.13/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.13/hooks/dist/hooks.js'
},
packages: {
'app': {
main: './app.component.ts',
defaultExtension: 'ts'
},
'devextreme': {
defaultExtension: 'js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
packageConfigPaths: [
"npm:@angular/*/package.json",
"npm:@angular/common/*/package.json",
"npm:rxjs/package.json",
"npm:rxjs/operators/package.json",
"npm:devextreme-angular/*/package.json",
"npm:devextreme-angular/ui/*/package.json",
"npm:devextreme-angular/package.json",
"npm:devexpress-diagram/package.json",
"npm:devexpress-gantt/package.json",
]
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<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/20.2.6/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.6/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js@0.10.2/dist/zone.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script src="config.js"></script>
<script>
System.import('app').catch(console.error.bind(console));
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<demo-app>Loading...</demo-app>
</div>
</body>
</html>