@material-ui/lab/legacy/ClockPicker/shared.js

Laboratory for new Material-UI modules.

export var CLOCK_WIDTH = 220;
export var CLOCK_HOUR_WIDTH = 36;
var clockCenter = {
  x: CLOCK_WIDTH / 2,
  y: CLOCK_WIDTH / 2
};
var baseClockPoint = {
  x: clockCenter.x,
  y: 0
};
var cx = baseClockPoint.x - clockCenter.x;
var cy = baseClockPoint.y - clockCenter.y;

var rad2deg = function rad2deg(rad) {
  return rad * (180 / Math.PI);
};

var getAngleValue = function getAngleValue(step, offsetX, offsetY) {
  var x = offsetX - clockCenter.x;
  var y = offsetY - clockCenter.y;
  var atan = Math.atan2(cx, cy) - Math.atan2(x, y);
  var deg = rad2deg(atan);
  deg = Math.round(deg / step) * step;
  deg %= 360;
  var value = Math.floor(deg / step) || 0;
  var delta = Math.pow(x, 2) + Math.pow(y, 2);
  var distance = Math.sqrt(delta);
  return {
    value: value,
    distance: distance
  };
};

export var getMinutes = function getMinutes(offsetX, offsetY) {
  var step = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 1;
  var angleStep = step * 6;

  var _getAngleValue = getAngleValue(angleStep, offsetX, offsetY),
      value = _getAngleValue.value;

  value = value * step % 60;
  return value;
};
export var getHours = function getHours(offsetX, offsetY, ampm) {
  var _getAngleValue2 = getAngleValue(30, offsetX, offsetY),
      value = _getAngleValue2.value,
      distance = _getAngleValue2.distance;

  var hour = value || 12;

  if (!ampm) {
    if (distance < 90) {
      hour += 12;
      hour %= 24;
    }
  } else {
    hour %= 12;
  }

  return hour;
};