/*

See LICENSE folder for this sample’s licensing information.

Abstract:

View controller demonstrating an accessible, custom view subclass that behaves like a stepper.

*/

import Cocoa

class CustomStepperViewController: NSViewController {

    @IBOutlet var customStepper: CustomStepperView!

    @IBOutlet var volumeLevel: NSTextField!

    // MARK: - View Controller Lifecycle

    override func viewDidLoad() {

        super.viewDidLoad()

        customStepper.actionHandler = { self.pressStepper(self) }

        customStepper.actionHandler!()

    }

    fileprivate func updateVolumeLabel(volume: CGFloat) {

        let number = NSNumber(value: Float(volume / 100.0))

        let numberFormatter = NumberFormatter()

        numberFormatter.numberStyle = NumberFormatter.Style.percent

        numberFormatter.maximumFractionDigits = 0

        let stringFormatter = NSLocalizedString("VolumeFormatter", comment: "Formatter for volume")

        var label = numberFormatter.string(from: number)

        label = String(format:stringFormatter, label!)

        volumeLevel.stringValue = label!

    }

    fileprivate func pressStepper(_ sender: Any) {

        updateVolumeLabel(volume: customStepper.value)

    }

}