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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| // | ||
| // GLLAngleRangeValueTransformer.m | ||
| // GLLara | ||
| // | ||
| // Created by Torsten Kammer on 07.09.12. | ||
| // Copyright (c) 2012 Torsten Kammer. All rights reserved. | ||
| // | ||
| import Foundation | ||
|
|
||
| /* | ||
| * Exactly what it says on the tin. | ||
| * The idea is that rotations are stored from 0…2pi here, but for sliders, you really want -pi…+pi instead. This transformer solves that issue. | ||
| */ | ||
| @objc class GLLAngleRangeValueTransformer: ValueTransformer { | ||
| @objc override class func allowsReverseTransformation() -> Bool { | ||
| return true | ||
| } | ||
| @objc override class func transformedValueClass() -> AnyClass { | ||
| return NSNumber.self | ||
| } | ||
|
|
||
| override func transformedValue(_ value: Any?) -> Any? { | ||
| let double = (value as! NSNumber).doubleValue | ||
| if double > Double.pi { | ||
| return double - Double.pi * 2 | ||
| } else { | ||
| return double | ||
| } | ||
| } | ||
|
|
||
| override func reverseTransformedValue(_ value: Any?) -> Any? { | ||
| let double = (value as! NSNumber).doubleValue | ||
| if double < 0.0 { | ||
| return double + Double.pi * 2 | ||
| } else { | ||
| return double | ||
| } } | ||
| } |
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