Angular Drag & Drop

A Mobile Friendly Drag & Drop, Sortable directives / services for Angular.
https://github.com/azarus/angular-dragndrop

Browser Preview

Mobile Preview

Supported platforms

Supports Drag & Drop both in browser and on mobile.

• Browser (tested in firefox, opera, chrome and safari)
• Android (tested)
• iOS (tested)
• WP (untested but ie works)

Install

Simply Clone the repository & copy the source files into your project.

Usage

First you need to import the DraggableModule and add to the imports section of your app module

import { DraggableModule } from "./dragndrop/draggable.module";

@NgModule({
    imports: [
        // Drag & Drop import
        DraggableModule,
    ],
    bootstrap: [ApplicationComponent]
})
export class ApplicationModule {}

HTML

<div draggable-container="item-container" containerId="test" class="draggable-container" (onSort)="onSort($event)">
    <div *draggableFor="let item of list.items">
        <div class="item" draggable-item>
            {{item}}
        </div>
    </div>
</div>

For a full example usage please visit the examples/ folder.

Documentation

Directives

You can mark any element to be a draggable item or draggable container. By using the directives listed below.

There is currently a bug in Angular2 that prevents drag & drop between multiple *ngFor containers for this there is a workaround implemented *draggableFor or *draggableForOf please use this directive instead of *ngFor if you intend to repeat your items with implicit inputs.

More about this issue can be read here:
https://github.com/angular/angular/issues/20824

• draggable-container Defines a container, within this container items can be sorted, dragged in/out
• draggable-item The draggable item that can be dragged.
• draggableForOf Is an *ngFor clone especially used by the drag & drop directive.

Services

• DraggableService Drag service for customizing the draggable behavior, scrolling & instantiating virtual drags.

Inputs

DraggableContainer has the following inputs

// Custom ID of the container, emitted along with the drag events. (See events section for more)
@Input("containerId")
containerId = null;

// Type of the container (Used to prevent drag & drop between different types of containers)
@Input("draggable-container")
containerType = null;

// Custom Elements (class="button-card") that may not initiate drag & drop
@Input("disabledElements")
public disabledElements = ["button-card"];

// HTML tags that may not accept click & touchstart events to trigger drag & drop
@Input("disabledTags")
disabledTags = ["button", "input", "a", "textarea"];

// Drag & drop animation speed
@Input("animationSpeed")
animationSpeed = 100;

// Delay before touch drag is activated
@Input("touchDragDelay")
touchDragDelay = 200;

Events

The following event is triggered when a drag & drop, or sorting happened

@Output("onSort")
public onSort = new EventEmitter();

Event structure:

{
    oldContainer: "Id of the of the old container",
    newContainer: "Id of the new container, or same as the old if it was a sorting",
    oldIndex: "Old index of the dragged item",
    newIndex: "New index of the dragged item",
}

Subscribe to the event such as:

<div draggable-container (onSort)="onSort($event)"></div>

Usually you would handle sorting, drag and drop to update your data model with the following:

onSort($event)
{
    // Move items around between arrays..
    this.lists[$event.newContainer].items.splice($event.newIndex, 0, this.lists[$event.oldContainer].items.splice($event.oldIndex, 1)[0]);
}

License

MIT.

Further help

Open an issue & PR's are welcome.

---

Posted on Utopian.io - Rewarding Open Source Contributors

---