zshell31

/** Links:
 *  - http://stackoverflow.com/questions/36368919/scrollable-image-with-pinch-to-zoom
 *  - http://blog.lum.pe/gesture-detection-in-react-native-fixing-unexpected-panning/
 *
 */

import React, {Component, PropTypes} from 'react';
import { Text, View, PanResponder, Image } from 'react-native';

function calcDistance(x1, y1, x2, y2) {