lucacasula91/SnackView

//
//  SVButtonItem.swift
//  SnackView
//
//  Created by Luca Casula on 09/11/17.
//  Copyright © 2017 Luca Casula. All rights reserved.
//

import UIKit

/** SVButtonItem is an SVItem consisting of a simple button that can perform the action that you want. */
public class SVButtonItem: SVItem {

    // MARK: - Private Properties
    private var buttonItem: UIButton
    private var buttonTintColor: UIColor?

    // MARK: - Public Properties
    private(set) var title: String

    // MARK: - Initialization Method
    /**
     Initialization method for SVButtonItem view. You can customize this item with title, tint color and action.
     - parameter title: The title of the button
     - parameter color: The button text color
     - parameter buttonAction: A closure in which to write the action that the button must perform
     */
    public init(withTitle title: String, tintColor color: UIColor? = nil, withButtonAction buttonAction: @escaping () -> Void) {
        self.title = title
        self.buttonTintColor = color
        self.buttonItem = UIButton()
        super.init()

        self.addButtonItem()

        //Assign the action block to tmpAction variable
        self.tmpAction = buttonAction
    }

    required public convenience init?(coder aDecoder: NSCoder) {
        return nil
    }


    // MARK: - Private Method
    private func addButtonItem() {
        self.buttonItem.translatesAutoresizingMaskIntoConstraints = false
        self.buttonItem.setTitle(title, for: UIControl.State())
        self.buttonItem.setTitleColor((buttonTintColor ?? blueButtonColor), for: UIControl.State.normal)
        self.buttonItem.setTitleColor((buttonTintColor ?? blueButtonColor).withAlphaComponent(0.5), for: UIControl.State.highlighted)
        self.buttonItem.addTarget(self, action: #selector(buttonSelector), for: .touchUpInside)
        self.buttonItem.titleLabel?.font = UIFont.preferredFont(forTextStyle: .headline)
        self.buttonItem.titleLabel?.adjustsFontForContentSizeCategory = true
        self.addSubview(self.buttonItem)

        //Add constraints to buttonItem
        let views: [String: Any] = ["buttonItem": buttonItem]
        self.addVisualConstraint("H:|-[buttonItem]-|", for: views)
        self.addVisualConstraint("V:|-[buttonItem]-|", for: views)
    }

    // MARK: - Custom Stuff
    private var tmpAction:() -> Void = {}
    @objc public func buttonSelector() {
        self.tmpAction()
    }
}