drag and resize a shape in react-native - react-native

Question

im new to react-native and overhelmed with all the options in the www. thats why i'm a bit confused how to complete this task in the best possible way.
i want to make something similar to this, but in react-native. A square-shape, which i can drag all over the view + resize it by dragging it's corners. I already took a look into exponent IDE and the given ThreeView-Component, but i think three.js is a bit over the top for this task, right?
[1]: http://codepen.io/abruzzi/pen/EpqaH

Answer 1

react-native-gesture-handler is the most appropriate thing for your case. I have created minimal example in snack. Here is the minimal code:
let FlatItem = ({ item }) => {
let translateX = new Animated.Value(0);
let translateY = new Animated.Value(0);
let height = new Animated.Value(20);
let onGestureEvent = Animated.event([
{
nativeEvent: {
translationX: translateX,
translationY: translateY,
},
},
]);
let onGestureTopEvent = Animated.event([
{
nativeEvent: {
translationY: height,
},
},
]);
let _lastOffset = { x: 0, y: 0 };
let onHandlerStateChange = event => {
if (event.nativeEvent.oldState === State.ACTIVE) {
_lastOffset.x += event.nativeEvent.translationX;
_lastOffset.y += event.nativeEvent.translationY;
translateX.setOffset(_lastOffset.x);
translateX.setValue(0);
translateY.setOffset(_lastOffset.y);
translateY.setValue(0);
}
};
return (
<View>
<PanGestureHandler onGestureEvent={onGestureTopEvent}>
<Animated.View
style={{
widht: 10,
height,
backgroundColor: 'blue',
transform: [{ translateX }, { translateY }],
}}
/>
</PanGestureHandler>
<PanGestureHandler
onGestureEvent={onGestureEvent}
onHandlerStateChange={onHandlerStateChange}>
<Animated.View
style={[
styles.item,
{ transform: [{ translateX }, { translateY }] },
]}>
<Text>{item.id}</Text>
</Animated.View>
</PanGestureHandler>
</View>
);
};
let data = [
{ key: 1, id: 1 },
];
export default class App extends React.Component {
render() {
return (
<View style={styles.container}>
<FlatItem item={data[0]} />
</View>
);
}
}
Here is the snack link if you want to test! PS: I have made only top resizing. The rest is for you to do! It should be enough to understand the way how to it!