<!DOCTYPE html>
<html>
<head>
<base href="." />
<title>angular2 playground</title>
<link rel="stylesheet" href="style.css" />
<script src="https://unpkg.com/zone.js/dist/zone.js"></script>
<script src="https://unpkg.com/zone.js/dist/long-stack-trace-zone.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
<script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></script>
<script src="config.js"></script>
<script>
System.import('app')
.catch(console.error.bind(console));
</script>
</head>
<body>
<my-app>
loading...
</my-app>
</body>
</html>
/* Styles go here */
body.dragging-mode {
}
div.sortable {
display: flex;
flex-wrap: wrap;
}
div.sortable div {
width: 200px;
height: 200px;
margin: 10px;
text-align: center;
font-size: 50px;
line-height: 200px;
background: #DDD;
border: 5px solid #5B99B3;
}
div.sortable div.dragging {
border: 5px solid #851E20;
}
### Angular Starter Plunker - Typescript
System.config({
//use typescript for compilation
transpiler: 'typescript',
//typescript compiler options
typescriptOptions: {
emitDecoratorMetadata: true
},
paths: {
'npm:': 'https://unpkg.com/'
},
//map tells the System loader where to look for things
map: {
'app': './src',
'@angular/core': 'npm:@angular/core/bundles/core.umd.js',
'@angular/common': 'npm:@angular/common/bundles/common.umd.js',
'@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
'@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
'@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
'@angular/http': 'npm:@angular/http/bundles/http.umd.js',
'@angular/router': 'npm:@angular/router/bundles/router.umd.js',
'@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
'@angular/core/testing': 'npm:@angular/core/bundles/core-testing.umd.js',
'@angular/common/testing': 'npm:@angular/common/bundles/common-testing.umd.js',
'@angular/compiler/testing': 'npm:@angular/compiler/bundles/compiler-testing.umd.js',
'@angular/platform-browser/testing': 'npm:@angular/platform-browser/bundles/platform-browser-testing.umd.js',
'@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic-testing.umd.js',
'@angular/http/testing': 'npm:@angular/http/bundles/http-testing.umd.js',
'@angular/router/testing': 'npm:@angular/router/bundles/router-testing.umd.js',
'rxjs': 'npm:rxjs',
'typescript': 'npm:typescript@2.0.2/lib/typescript.js'
},
//packages defines our app package
packages: {
app: {
main: './main.ts',
defaultExtension: 'ts'
},
rxjs: {
defaultExtension: 'js'
}
}
});
//main entry point
import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {AppModule} from './app';
platformBrowserDynamic().bootstrapModule(AppModule)
//our root app component
import {Component, NgModule} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
import {SortableDirective} from './sortable.directive'
@Component({
selector: 'my-app',
template: `
<div>
<h2>Sortable</h2>
<div appSortable class="sortable" (orderChanged)="orderChanged($event)">
<div *ngFor="let index of indices">{{index}}</div>
</div>
<div>
Order = {{order}}
</div>
</div>
`,
})
export class App {
indices = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
order = [...this.indices];
constructor() {
}
orderChanged(order) {
this.order = order;
}
}
@NgModule({
imports: [ BrowserModule ],
declarations: [ App, SortableDirective ],
bootstrap: [ App ]
})
export class AppModule {
}
import { Directive, ElementRef, EventEmitter, HostListener, Output } from '@angular/core';
import { Observable } from 'rxjs/Observable';
@Directive({
selector: '[appSortable]'
})
export class SortableDirective implements AfterContentInit {
@Output() orderChanged = new EventEmitter();
private _draggingElement: HTMLElement;
private _dropSucceded: boolean;
private _isInsideContainer: boolean;
constructor(private element: ElementRef) { }
ngAfterContentInit() {
this.setDataAttributesToChildren();
this.savePositions('orgIndex');
}
@HostListener('dragstart', ['$event'])
dragStart(event) {
this.savePositions('dragIndex');
this._draggingElement = this.getDraggableElement(event);
this._dropSucceded = false;
this._isInsideContainer = true;
// If you prefer to set an image while dragging
// let img = new Image();
// img.src = 'YOUR-IMAGE.PNG';
// event.dataTransfer.setDragImage(img, 10, 10);
// Change body class if something has to be done while dragging
document.body.classList.add('dragging-mode');
// Defer adding current element dragging class to let th browser to take a snapshot of the selected element
setTimeout(() => {
this._draggingElement.classList.add('dragging');
});
}
@HostListener('dragend', ['$event'])
dragEnd(event: MouseEvent) {
if (!this._dropSucceded) {
this.cancelDragging();
}
// Remove dragging CSS classes
document.body.classList.remove('dragging-mode');
this._draggingElement.classList.remove('dragging');
this.element.nativeElement.classList.remove('dragging-outside');
event.preventDefault();
}
@HostListener('dragover', ['$event'])
dragOver(event: MouseEvent) {
// Required to receive "drop"" event
event.preventDefault();
}
@HostListener('drag', ['$event'])
drag(event) {
// Check if mouse is outside container or not
const divCoords = this.element.nativeElement.getBoundingClientRect();
const inside = (event.clientX >= divCoords.left && event.clientX <= divCoords.right && event.clientY >= divCoords.top && event.clientY <= divCoords.bottom);
// Check if mouse mouves outisde container
if (this._isInsideContainer && !inside) {
this.element.nativeElement.classList.add('dragging-outside');
this.cancelDragging();
}
// Else check if mouse moves back inside container
else if (!this._isInsideContainer && inside) {
this.element.nativeElement.classList.remove('dragging-outside');
}
this._isInsideContainer = inside;
}
@HostListener('dragenter', ['$event'])
dragEnter(event: MouseEvent) {
// Search for "draggable" element under the mouse
const element: HTMLElement = this.getDraggableElement(event);
if (element && element.attributes) {
const draggingIndex = this._draggingElement.dataset['index'];
const dropIndex = element.dataset['index'];
if (draggingIndex !== dropIndex) {
// Move dragging ghost element at its new position
if (draggingIndex > dropIndex) {
this.element.nativeElement.insertBefore(this._draggingElement, element);
} else {
this.element.nativeElement.insertBefore(this._draggingElement, element.nextSibling);
}
this.setDataAttributesToChildren();
}
}
event.preventDefault();
}
@HostListener('drop', ['$event'])
drop(event: MouseEvent) {
this._dropSucceded = true;
let values = [];
for (let i = 0; i < this.element.nativeElement.childElementCount; i++) {
let element = this.element.nativeElement.children[i];
values.push(element.dataset.orgIndex);
};
this.orderChanged.emit(values);
event.preventDefault();
}
private setDataAttributesToChildren() {
for (let i = 0; i < this.element.nativeElement.childElementCount; i++) {
let element = this.element.nativeElement.children[i];
element.draggable = true;
element.dataset.index = i;
}
}
private savePositions(attribute) {
for (let i = 0; i < this.element.nativeElement.childElementCount; i++) {
let element = this.element.nativeElement.children[i];
element.dataset[attribute] = i;
}
}
private getElementAt(attribute, index) {
for (let i = 0; i < this.element.nativeElement.childElementCount; i++) {
let element = this.element.nativeElement.children[i];
if (parseInt(element.dataset[attribute], 10) === index) {
return element;
}
}
return null;
}
private cancelDragging() {
let index = this.element.nativeElement.childElementCount - 1;
// Get last element
let beforeElement = this.getElementAt('dragIndex', index);
while (index > 0) {
const element = this.getElementAt('dragIndex', index - 1);
this.element.nativeElement.insertBefore(element, beforeElement);
beforeElement = element;
index--;
}
}
private getDraggableElement(event): HTMLElement {
// Search for "draggable" element under the mouse
let element: HTMLElement = <HTMLElement> event.target;
while (element && element.attributes && !element.attributes['draggable']) {
element = <HTMLElement> element.parentNode;
}
return element;
}
}