getAngleOfValue method
Return angle of knob in degree corresponding to the provided value
Implementation
double getAngleOfValue(double newValue) {
var min = AngleHelper.radian(value.startAngle);
var max = AngleHelper.radian(value.endAngle);
min = AngleHelper.normalize(min);
while (min > max) {
// both min and max are positive and in the correct order.
max += 2 * math.pi;
}
var angle = (max - min) /
(value.maximum - value.minimum) *
(newValue - value.minimum) +
min;
angle = AngleHelper.normalize(angle - math.pi / 2);
// while (angle < min) {
// // set angle after min angle
// angle += 2 * math.pi;
// }
return AngleHelper.degree(angle);
}