Created
July 9, 2015 06:17
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class Flix extends Component { | |
constructor(props) { | |
super(props); | |
this.state = { | |
person: People[0], | |
}; | |
} | |
_goToNextPerson() { | |
let currentPersonIdx = People.indexOf(this.state.person); | |
let newIdx = currentPersonIdx + 1; | |
this.setState({ | |
person: People[newIdx > People.length - 1 ? 0 : newIdx] | |
}); | |
} | |
render() { | |
return ( | |
<TinderPanner next={this._goToNextPerson.bind(this)}> | |
{({pan, enter, panResponder}) => { | |
let [translateX, translateY] = [pan.x, pan.y]; | |
let rotate = pan.x.interpolate({inputRange: [-200, 0, 200], outputRange: ["-30deg", "0deg", "30deg"]}); | |
let opacity = pan.x.interpolate({inputRange: [-200, 0, 200], outputRange: [0.5, 1, 0.5]}) | |
let scale = enter; | |
let animatedCardStyles = {transform: [{translateX}, {translateY}, {rotate}, {scale}], opacity}; | |
let yupOpacity = pan.x.interpolate({inputRange: [0, 150], outputRange: [0, 1]}); | |
let yupScale = pan.x.interpolate({inputRange: [0, 150], outputRange: [0.5, 1], extrapolate: 'clamp'}); | |
let animatedYupStyles = {transform: [{scale: yupScale}], opacity: yupOpacity} | |
let nopeOpacity = pan.x.interpolate({inputRange: [-150, 0], outputRange: [1, 0]}); | |
let nopeScale = pan.x.interpolate({inputRange: [-150, 0], outputRange: [1, 0.5], extrapolate: 'clamp'}); | |
let animatedNopeStyles = {transform: [{scale: nopeScale}], opacity: nopeOpacity}; | |
return ( | |
<View style={styles.container}> | |
<Animated.View style={[styles.card, animatedCardStyles, {backgroundColor: this.state.person}]} {...this._panResponder.panHandlers}> | |
</Animated.View> | |
<Animated.View style={[styles.nope, animatedNopeStyles]}> | |
<Text style={styles.nopeText}>Nope!</Text> | |
</Animated.View> | |
<Animated.View style={[styles.yup, animatedYupStyles]}> | |
<Text style={styles.yupText}>Yup!</Text> | |
</Animated.View> | |
</View> | |
); | |
}} | |
</TinderPanner> | |
); | |
} | |
} |
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class TinderPanner extends Component { | |
constructor(props) { | |
super(props); | |
this.state = { | |
pan: new Animated.ValueXY(), | |
enter: new Animated.Value(0.5) | |
} | |
} | |
componentDidMount() { | |
this._animateEntrance(); | |
} | |
_animateEntrance() { | |
Animated.spring( | |
this.state.enter, | |
{ toValue: 1, friction: 8 } | |
).start(); | |
} | |
componentWillMount() { | |
this._panResponder = PanResponder.create({ | |
onMoveShouldSetResponderCapture: () => true, | |
onMoveShouldSetPanResponderCapture: () => true, | |
onPanResponderGrant: (e, gestureState) => { | |
this.state.pan.setOffset({x: this.state.pan.x._value, y: this.state.pan.y._value}); | |
this.state.pan.setValue({x: 0, y: 0}); | |
}, | |
onPanResponderMove: Animated.event([ | |
null, {dx: this.state.pan.x, dy: this.state.pan.y}, | |
]), | |
onPanResponderRelease: (e, {vx, vy}) => { | |
this.state.pan.flattenOffset(); | |
var velocity; | |
if (vx > 0) { | |
velocity = clamp(vx, 3, 5); | |
} else if (vx < 0) { | |
velocity = clamp(vx * -1, 3, 5) * -1; | |
} | |
if (this.state.pan.x._value > 120 || this.state.pan.x._value < -120) { | |
Animated.decay(this.state.pan.x, { | |
velocity: velocity, | |
deceleration: 0.98, | |
}).start(this._resetState.bind(this)) | |
Animated.decay(this.state.pan.y, { | |
velocity: vy, | |
deceleration: 0.985, | |
}).start(); | |
} else { | |
Animated.spring(this.state.pan, { | |
toValue: {x: 0, y: 0}, | |
friction: 4 | |
}).start() | |
} | |
} | |
}) | |
} | |
_resetState() { | |
this.state.pan.setValue({x: 0, y: 0}); | |
this.state.enter.setValue(0); | |
this.props.next(); | |
this._animateEntrance(); | |
} | |
render() { | |
let { pan, enter } = this.state; | |
let panResponder = this._panResponder; | |
return this.props.children({ pan, enter, panResponder }); | |
} | |
} |
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