angular2-draggable

angular2-draggable

• Online Demo
• Online Docs

Table of contents

• angular2-draggable
  • Table of contents
• Getting Started
• Installation
• Draggable
• Resizable
• API
  • Directive:
  • CSS:
• Events
• Demo

Getting Started

angular2-draggable has angular directives that make the DOM element draggable and resizable.

• ngDraggable

  • v16.x requires Angular >= 16
  • v2.x requires Angular >= 6
  • v1.5.0 requires Angular >= 4 && < 6

• ngResizable

  • provided since v2.0, requires Angular >= 6

CHANGELOG

Installation

npm install angular2-draggable --save

Draggable

Please refer to the demo page.

• Firstly, import AngularDraggableModule in your app module (or any other proper angular module):

  import { AngularDraggableModule } from 'angular2-draggable';
  
  @NgModule({
    imports: [
      ...,
      AngularDraggableModule
    ],
    ...
  })
  export class AppModule { }
  

• Then: use ngDraggable directive to make the DOM element draggable.

  • Simple example:

    • html:

    <div ngDraggable>Drag me!</div>
    

  • Use [handle] to move parent element:

    • html:

    <div ngDraggable [handle]="DemoHandle" class="card">
      <div #DemoHandle class="card-header">I'm handle. Drag me!</div>
      <div class="card-block">You can't drag this block now!</div>
    </div>
    

Resizable

Please refer to the demo page.

Besides of importing AngularDraggableModule, you need to import resizable.min.css in your project. If you use angular-cli, you can add this in angular.json:

"styles": [
    ...
+   "node_modules/angular2-draggable/css/resizable.min.css"
]

Then you can use ngResizable directive to make the element resizable:

<div ngResizable> I'm now resizable </div>

<div [ngResizable]="false"> Resizable is disabled now </div>

<div ngResizable [rzHandles]="'n,e,s,w,se,sw,ne,nw'"> Each side is resizable </div>

Well you can use both directives concurrently if you wish:

<div ngDraggable ngResizable> I'm now draggable and resizable </div>

API

Directive:

• ngDraggable directive support following input porperties:

  Input	Type	Default	Description
  ngDraggable	boolean	true	You can toggle the draggable capability by setting true or false
  handle	HTMLElement	null	Use template variable to refer to the handle element. Then only the handle element is draggable
  zIndex	string	null	Use it to set z-index property when element is not moving
  zIndexMoving	string	null	Use it to set z-index property when element is moving
  bounds	HTMLElemnt	null	Use it to set the boundary
  inBounds	boolean	false	Use it make element stay in the bounds
  outOfBounds	{ top: boolean; bottom: boolean; right: boolean; left: boolean }	false	Set it to allow element get out of bounds from the direction. Refer to demo
  position	{ x: number, y: number }	{ x:0, y:0 }	Use it to set position offset
  gridSize	number	1	Use it for snapping to grid. Refer to demo
  preventDefaultEvent	boolean	false	Whether to prevent default mouse event
  scale	number	1	Set it when parent element has CSS transform scale
  lockAxis	'x' | 'y'	null	Restrict dragging to a specific axis by locking another one

• ngResizable directive support following input porperties:

  Input	Type	Default	Description
  ngResizable	boolean	true	You can toggle the resizable capability by setting true or false
  rzHandles	string	"e,s,se"	Which handles can be used for resizing. Optional types in "n,e,s,w,se,sw,ne,nw" or "all"
  rzAspectRatio	boolean | number	false	boolean: Whether the element should be constrained to a specific aspect ratio. number: Force the element to maintain a specific aspect ratio during resizing (width/height)
  rzContainment	Selector | string | Element	null	Constrains resizing to within the bounds of the specified element or region. It accepts an HTMLElement, 'parent' or a valid CSS selector string such as '#id'
  rzGrid	number | number[]	1	Snaps the resizing element to a grid, every x and y pixels. Array values: [x, y]
  rzMinWidth	number	1	The minimum width the resizable should be allowed to resize to.
  rzMaxWidth	number	1	The maximum width the resizable should be allowed to resize to.
  rzMinHeight	number	1	The minimum height the resizable should be allowed to resize to.
  rzMaxHeight	number	1	The maximum height the resizable should be allowed to resize to.
  preventDefaultEvent	boolean	false	Whether to prevent default mouse event.
  rzScale	number	1	Set it when parent element has CSS transform scale

CSS:

• When ngDraggable is enabled on some element, ng-draggable and ng-dragging class is automatically toggled on it. You can use it to customize the pointer style. For example:

  .ng-draggable {
    cursor: grab;
  }
  
  .ng-dragging {
    cursor: grabbing;
  }
  

• When ngResizable is enabled on some element, ng-resizable class is automatically assigned to it. And handle elements will be created with ng-resizable-handle. You can customize the handle style.

Events

• ngDraggable directive:

  Output	$event	Description
  started	nativeElement of host	emitted when start dragging
  stopped	nativeElement of host	emitted when stop dragging
  edge	{ top: boolean, right: boolean, bottom: boolean, left: boolean }	emitted after [bounds] is set
  movingOffset	{ x: number, y: number }	emit position offset when moving
  endOffset	{ x: number, y: number }	emit position offset when stop moving

  Simple example:

  <div ngDraggable
    (started)="onDragBegin($event)"
    (stopped)="onDragEnd($event)"
    (movingOffset)="onMoving($event)"
    (endOffset)="onMoveEnd($event)">
    Drag me!
  </div>
  

• ngResizable directive:

  Output	$event	description
  rzStart	IResizeEvent	emitted when start resizing
  rzResizing	IResizeEvent	emitted when resizing
  rzStop	IResizeEvent	emitted when stop resizing

  export interface IResizeEvent {
    host: any;
    handle: any;
    size: {
      width: number;
      height: number;
    };
    position: {
      top: number;
      left: number;
    };
    direction: {
      n: boolean;
      s: boolean;
      w: boolean;
      e: boolean;
    };
  }
  

  Simple example:

  <div ngResizable
    (rzStart)="onResizeStart($event)"
    (rzResizing)="onResizing($event)"
    (rzStop)="onResizeStop($event)">
    Resizable
  </div>
  

Demo

You can clone this repo to your working copy and then launch the demo page in your local machine:

npm install
npm run demo

# or
yarn install
yarn demo

The demo page server is listening to: http://localhost:4203

Changelog

16.0.0 (2023-05-20)

New

• Support Angular 16