     weak var viewMetal:VLinearEquationsPlotMetal?
     private weak var controller:CLinearEquationsPlot!
     private weak var viewBar:VLinearEquationsPlotBar!
+    private var startingPoint:CGPoint?
     private let kBarHeight:CGFloat = 80
     
     override init(controller:CController)

        
        if view !== viewBar
        {
            
        }
    }
    
    override func touchesEnded(_ touches:Set<UITouch>, with event:UIEvent?)
    {
    }
    
    override func touchesMoved(_ touches:Set<UITouch>, with event:UIEvent?)
    {
    }
    
    override func touchesCancelled(_ touches:Set<UITouch>, with event:UIEvent?)
    {
        
    }
}

    {
        guard
        
            let touch:UITouch = touches.first,
            let view:UIView = touch.view
        
        else
        {
