Angular2 Drag to Scroll

Lightweight drag to scroll directive for Angular2

Scroll on drag!

Try out the demo!

Install

You can get it on npm.

npm install angular2-drag-scroll --save

Setup

You'll need to add DragScrollModule to your application module.

import { DragScrollModule } from 'angular2-drag-scroll';
...

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    DragScrollModule,
    ...
  ],
  providers: [],
  bootstrap: [AppComponent]
})

export class AppModule {
}

Add the drag-scroll attribute to a scrollable element:

@Component({
  selector: 'sample',
  template:`
  <div drag-scroll>
    Big text goes here...
  </div>
  `
})
class Sample {}

That's it! Now you can scroll it by dragging.

API REFERENCE

Name	Type	Description	Default
scrollbar-hidden	@Input	Whether the scroll bar for this element is hidden.	false
drag-scroll-disabled	@Input	Whether all draging and scrolling events is disabled.	false
drag-scroll-x-disabled	@Input	Whether horizontally dragging and scrolling events is disabled.	false
drag-scroll-y-disabled	@Input	Whether vertically dragging and scrolling events is disabled.	false
drag-disabled	@Input	Whether draging is disabled.	false

---

Add navigation button

@Component({
  selector: 'sample',
  template:`
  <div drag-scroll #nav>
    Big text goes here...
  </div>
  <button (click)="moveLeft()">Left</button>
  <button (click)="moveRight()">Right</button>
  `
})
class Sample {
  @ViewChild('nav', {read: DragScroll}) ds: DragScroll;
  
  moveLeft() {
    this.ds.moveLeft();
  }

  moveRight() {
    this.ds.moveRight();
  }
}

Dynamically apply the plugin to a DOM element

This was brought by @tommykamkcm. The below code block demonstrates how to attach the directive dynamically on a DOM i.e. deep rendered element.

constructor(
  private cdr: ChangeDetectorRef,
  private element: ElementRef,
  private renderer: Renderer
) {}
dragScrollDom: any;
dragScrollRef: ElementRef;
dragScroll: DragScroll;

ngAfterViewInit() {
  // attach to .nav-tabs element
  this.dragScrollDom = this.element.nativeElement.querySelector('.nav-tabs');
  this.dragScrollRef = new ElementRef(this.dragScrollDom );

  this.dragScroll = new DragScroll(this.dragScrollRef, this.renderer, this.cdr);
  this.dragScroll.attach({
    disabled: false,
    scrollbarHidden: true,
    yDisabled: true,
    xDisabled: false,
  });
}

Contributing

Clone the repository, and run npm install, npm start. The demo app will starts on port :4200. I usually do my development on the demo app.

I'll accept pretty much everything so feel free to open a Pull-Request

License

MIT