/*

 Copyright (C) 2017 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 A UIViewController subclass that manages a QuartzDashView and a UI to allow for the selection of the line dash pattern and phase.

 */

import UIKit

class QuartzDashViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource

{

    @IBOutlet weak var quartzDashView: QuartzDashView!

    @IBOutlet weak var picker: UIPickerView!

    @IBOutlet weak var phaseSlider: UISlider!

    let patterns: [[CGFloat]] = [

        [10.0, 10.0],

        [10.0, 20.0, 10.0],

        [10.0, 20.0, 30.0],

        [10.0, 20.0, 10.0, 30.0],

        [10.0, 10.0, 20.0, 20.0],

        [10.0, 10.0, 20.0, 30.0, 50.0]

    ]

    override func viewDidLoad() {

        super.viewDidLoad()

        quartzDashView.dashPattern = patterns[0]

        picker.selectRow(0, inComponent:0, animated:false)

    }

    @IBAction func takeDashPhaseFrom(_ sender: UISlider) {

        quartzDashView.dashPhase = CGFloat(sender.value)

    }

    @IBAction func reset(_ sender: AnyObject) {

        phaseSlider.value = 0.0

        quartzDashView.dashPhase = 0.0

    }

    // UIPickerViewDelegate & UIPickerViewDataSource methods

    func numberOfComponents(in pickerView: UIPickerView) -> Int {

        return 1

    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {

        return patterns.count

    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {

        var p: [CGFloat] = patterns[row]

        var title = String(format:"%.0f", p[0])

        for i in 1..<p.count {

            title += String(format:"-%.0f", p[i])

        }

        return title

    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {

        quartzDashView.dashPattern = patterns[row]

    }

}