//
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// GradientView.swift
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// SwiftEntryKit
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//
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// Created by Daniel Huri on 4/20/18.
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// Copyright (c) 2018 huri000@gmail.com. All rights reserved.
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//
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import UIKit
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class GradientView: UIView {
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struct Style {
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let gradient: EKAttributes.BackgroundStyle.Gradient
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let displayMode: EKAttributes.DisplayMode
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init?(gradient: EKAttributes.BackgroundStyle.Gradient?,
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displayMode: EKAttributes.DisplayMode) {
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guard let gradient = gradient else {
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return nil
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}
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self.gradient = gradient
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self.displayMode = displayMode
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}
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}
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private let gradientLayer = CAGradientLayer()
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var style: Style? {
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didSet {
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setupColor()
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}
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}
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init() {
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super.init(frame: .zero)
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layer.addSublayer(gradientLayer)
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}
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required init?(coder aDecoder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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gradientLayer.frame = bounds
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}
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private func setupColor() {
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guard let style = style else {
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return
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}
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gradientLayer.colors = style.gradient.colors.map {
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$0.color(for: traitCollection, mode: style.displayMode).cgColor
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}
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gradientLayer.startPoint = style.gradient.startPoint
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gradientLayer.endPoint = style.gradient.endPoint
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}
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override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
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setupColor()
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}
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}
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