Angular library defining a virtual joystick component. Designed reactively and implemented with RxJS.

Demo

• Clone the repository
• Install all prerequisites with cd ng-joystick && npm install
• Launch local development server with ng serve
• Open a browser and type localhost:4200

Install

npm install ng-joystick

Input APIs

There some input properties offered as APIs which can be set as properties when using the component

• @Input() position: {left: string, top: string}; position is to be used to set the position of the ng-joystick component within the container which contains it
• @Input() size = 100; The size of the joystick
• @Input() threshold = 0.1; The minimal distance from previous point that the pointer/mouse has to have in order for a 'movement event' to be fired

Output APIs

Some Observables are exposed as public APIs to the user of this component. Such Observables emit different movement related events which the user of the component may be interested in

• joystickStart$ - emits when the pointer/mouse is clicked on the joystick handle to start the movement of the joystick
• joystickMove$: Observable - emits every movement of the joystick handle with the details of the point the handle moved to;
• joystickRelease$: Observable - emits when the pointer/mouse is released after have dragged the joystick handle with the details of the point where the pointer/mouse has been released
• up$ - emits if the movement direction is up
• down$ - emits if the movement direction is down
• right$ - emits if the movement direction is right;
• left$ - emits if the movement direction is left;
• planDirX$ - emits 'right' or 'left' if the horizontal movement is right or left;
• planDirY$ - emits 'up' or 'down' if the vertical movement is up or down;

Credit for Inspiration

Inspired by nipplejs for the visual behavior - also some parts of code are taken from there. The core implementation has been re-written with reactive programming style and encapsulated in a Angular component.

NgJoystickApp

This project was generated with Angular CLI version 6.0.8.

Build the Library

ng build --prod ng-joystick

Development server

Run ng serve for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.

Code scaffolding

Run ng generate component component-name to generate a new component. You can also use ng generate directive|pipe|service|class|guard|interface|enum|module.

Build

Run ng build to build the project. The build artifacts will be stored in the dist/ directory. Use the --prod flag for a production build.

Running unit tests

Run ng test to execute the unit tests via Karma.

Running end-to-end tests

Run ng e2e to execute the end-to-end tests via Protractor.

Further help

To get more help on the Angular CLI use ng help or go check out the Angular CLI README.