getPositionByValue method
Implementation
double getPositionByValue(num value) {
double offsetValue = 0;
for (RulerRange config in widget.ranges) {
if (config.begin <= value && config.end >= value) {
offsetValue +=
((value - config.begin) / config.scale) * _ruleScaleInterval;
break;
} else if (value >= config.begin) {
var totalCount =
((config.end - config.begin) / config.scale).truncate();
offsetValue += totalCount * _ruleScaleInterval;
}
}
return offsetValue;
}