     func clearDisabled()
 }
 
-public class BrushProperties {
-    public var color: CIColor!
-    public var width: CGFloat!
+private class BrushProperties {
+    private var color: CIColor!
+    private var width: CGFloat!
     
     init() {
         color = CIColor(color: UIColor.blackColor())

//

public protocol TouchDrawViewDelegate {
    
    // Undo button
    func undoEnabled()
    func undoDisabled()

    }
}

private class Stroke {
    private var points: NSMutableArray!
    private var properties: BrushProperties!
    
    init() {
        points = []
