//
//  GradientView.swift
//  BlockyFroggy
//
//  Created by John Ryland on 21/10/2016.
//  Copyright © 2016 John Ryland. All rights reserved.
//

import UIKit

@IBDesignable public class GradientView: UIView {
  @IBInspectable public var topColor: UIColor? {
    didSet {
      configureView()
    }
  }
  @IBInspectable public var bottomColor: UIColor? {
    didSet {
      configureView()
    }
  }
  
  override public class func layerClass() -> AnyClass {
    return CAGradientLayer.self
  }
  
  public required init(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)!
    configureView()
  }
  
  override init(frame: CGRect) {
    super.init(frame: frame)
    configureView()
  }
  
  public override func tintColorDidChange() {
    super.tintColorDidChange()
    configureView()
  }
  
  func configureView() {
    let layer = self.layer as! CAGradientLayer
    let locations = [ 0.0, 1.0 ]
    layer.locations = locations
    let color1 = topColor ?? self.tintColor as UIColor
    let color2 = bottomColor ?? UIColor.blackColor() as UIColor
    let colors: Array <AnyObject> = [ color1.CGColor, color2.CGColor ]
    layer.colors = colors
  }
}