public class HorizontalScrollGrid: UIScrollView {

    public var arrTitles: [String] = []

    public var itemHeight: CGFloat = 45.0

    public var verticalSpacing: CGFloat = 10.0
    public var horizontalSpacing: CGFloat = 10.0

    public var numberOfRows: Int = 4

    public var textFont: UIFont = UIFont.systemFont(ofSize: 15.0, weight: .bold)
    public var textForeground: UIColor = UIColor.black
    public var textBackground: UIColor = UIColor.yellow
    public var textAlignment: NSTextAlignment = NSTextAlignment.center
    public var textPadding: CGFloat = 20.0

    public var roundedCorners: Bool = true

    public var borderColor: UIColor = UIColor.black
    public var borderWidth: CGFloat = 1.0

    public override init(frame: CGRect) {
        super.init(frame: frame)
        setup()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    public func setup() {

        var maxX: CGFloat = 0.0
        var maxY: CGFloat = 0.0

        var totalWidth: CGFloat = 0.0
        var totalHeight: CGFloat = 0.0

        let itemsPerRow = (arrTitles.count/numberOfRows)

        for (index, text) in arrTitles.enumerated() {

            let button = UIButton(type: .custom)
            button.setTitle(text, for: .normal)
            button.setTitleColor(textForeground, for: .normal)
            button.titleLabel?.font = textFont
            button.backgroundColor = textBackground
            button.sizeToFit()

            var width: CGFloat = 60.0
            var height: CGFloat = 0.0

            let currentRow = index/itemsPerRow

            if index >= (currentRow + 1) {
                height = (CGFloat((currentRow)) * verticalSpacing) + (CGFloat((currentRow)) * itemHeight)
                if currentRow != 0 && (index/currentRow) == itemsPerRow  && (index % currentRow) == 0 {
                    totalWidth = 0.0
                }
            } else {
                height = 0
                if index == 0 {
                    totalWidth = 0.0
                }
            }

            if button.frame.width + textPadding > 60.0 {
                width = button.frame.width + textPadding
            }

            let xCoord = CGFloat(totalWidth + horizontalSpacing)

            button.frame = CGRect(x: xCoord, y: height, width: width, height: itemHeight)

            if roundedCorners {
                button.layer.cornerRadius = button.frame.height / 2
            }
            button.layer.borderColor = borderColor.cgColor
            button.layer.borderWidth = borderWidth
            button.layer.masksToBounds = true

            totalWidth = button.frame.maxX + horizontalSpacing
            totalHeight = button.frame.maxY

            if totalWidth > maxX {
                maxX = totalWidth
            }

            if (totalHeight + (2 * verticalSpacing) + itemHeight) > maxY {
                maxY = (totalHeight + (2 * verticalSpacing) + itemHeight)
            }

            self.addSubview(button)
        }

        self.contentSize = CGSize(width: maxX, height: maxY)

    }

}