@kictech/react-native-progress/Shapes/Circle.js

Progress indicators and spinners for React Native using ReactART

import React, { Component } from 'react';
import PropTypes from 'prop-types';
import { Path } from 'react-native-svg';

function makeCirclePath(x, y, radius, direction) {
  const reverseFlag = direction === 'counter-clockwise' ? 0 : 1;

  return `M${x} ${y}
          m${radius} 0
          a${radius} ${radius} 0 0 ${reverseFlag} 0 ${radius * 2}
          a${radius} ${radius} 0 0 ${reverseFlag} 0 ${radius * -2}`;
}

export default class Circle extends Component {
  static propTypes = {
    radius: PropTypes.number.isRequired,
    offset: PropTypes.shape({
      top: PropTypes.number,
      left: PropTypes.number,
    }),
    strokeWidth: PropTypes.number,
    direction: PropTypes.oneOf(['clockwise', 'counter-clockwise']),
  };

  static defaultProps = {
    offset: { top: 0, left: 0 },
    strokeWidth: 0,
    direction: 'clockwise',
  };

  render() {
    const { radius, offset, strokeWidth, direction, ...restProps } = this.props;
    const path = makeCirclePath(
      (offset.left || 0) + strokeWidth / 2,
      (offset.top || 0) + strokeWidth / 2,
      radius - strokeWidth / 2,
      direction
    );
    return (
      <Path
        d={path}
        strokeLinecap="butt"
        strokeWidth={strokeWidth}
        {...restProps}
      />
    );
  }
}