nativescript-facebookrebound
by bradmartin | v1.0.1
NativeScript plugin to use Facebook's Spring Animations for Android.
npm i --save nativescript-facebookrebound
  • Version: 1.0.1
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nativescript-facebookrebound :basketball:

NativeScript plugin to provide access to Facebook's Spring Animations for Android. This is just a simple wrapper to remove some of the complexity of Rebound, if you want to provide more "sugar" on the native methods in the Rebound library then submit a PR :)

FacebookRebound Usage

FacebookRebound

Installation

npm install nativescript-facebookrebound

Usage

Typically, you'll want to attach a Spring during the loaded event for your view item

XML:

 <Image tap="springThis" height="240" loaded="picLoaded" src="~/images/deadpool2.jpg" stretch="aspectFit" />

JS:

var rebound = require("nativescript-facebookrebound");


function picLoaded (args) {

// Getting the native android <img src="file:///C:\Users\Brad\Source\Repos\nativescript-facebookrebound\screens\facebookRebound.gif" />view (android.view.ImageView in this example)
var view = args.object.android;

// create a Rebound Spring() ( TENSION, FRICTION ) -- @returns a Spring() if successful
rebound.createSpring(500, 10).then(function (result) {

// Now we have a Spring to work with.
Spring = result;

// called whenever the spring is updated
rebound.onSpringUpdate(function () {
var mappedValue = com.facebook.rebound.SpringUtil.mapValueFromRangeToRange(Spring.getCurrentValue(), 0, 1, 1, 0.5);
view.setScaleX(mappedValue);
view.setScaleY(mappedValue);
});

// called whenever the spring leaves its resting state
rebound.onSpringActivate(function () {
console.log('setSpringActivate started...');
});

// called whenever the spring notifies of displacement state changes
rebound.onSpringAtEndState(function () {
console.log('setSpringAtEndState...');
});

// called whenever the spring achieves a resting state
rebound.onSpringAtRest(function () {
console.log('setSpringAtRest...');
// Here you could do something like hide a view or trigger more spring if you wanted...
});

}, function (err) {
alert("Error in rebound.createSpring(): " + err);
});
}
exports.picLoaded = picLoaded;


function springThis(args) {
// quick boolean to check if we are going up or down
if (mMovedUp) {
// setEndValue(): set the rest value to determine the displacement for the spring
Spring.setEndValue(0);
} else {
Spring.setEndValue(1);
}
mMovedUp = !mMovedUp;
}
exports.springThis = springThis;

API

  • createSpring(tension: number, friction: damper) Promise...
    • returns - Spring()

Once you have a Spring returned from createSpring(), you set your callbacks for the listener events:

  • onSpringUpdate(function)
  • onSpringActivate(function)
  • onSpringAtEndState(function)
  • onSpringAtRest(function)