242 lines
8.9 KiB
Swift
242 lines
8.9 KiB
Swift
//
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// CalendarHeaderReusableView.swift
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// VDS
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//
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// Created by Kanamarlapudi, Vasavi on 30/04/24.
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//
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import UIKit
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import VDSTokens
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/// Header view to display month and year along with days of week.
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class CalendarHeaderReusableView: UICollectionReusableView {
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///Identifier for the Calendar Header Reusable View.
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static let identifier: String = String(describing: CalendarHeaderReusableView.self)
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//--------------------------------------------------
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// MARK: - Public Properties
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//--------------------------------------------------
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/// A callback when the next button clicked.
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public var nextClicked: (() -> (Void))?
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/// A callback when the previous button clicked.
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public var previousClicked: (() -> (Void))?
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//--------------------------------------------------
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// MARK: - Private Properties
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//--------------------------------------------------
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internal var containerSize: CGSize { CGSize(width: 304, height: 88) }
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private lazy var stackView = UIStackView().with {
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$0.translatesAutoresizingMaskIntoConstraints = false
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$0.distribution = .fill
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$0.spacing = VDSLayout.space1X
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$0.axis = .vertical
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$0.backgroundColor = .clear
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}
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private lazy var topHeaderView = UIStackView().with {
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$0.translatesAutoresizingMaskIntoConstraints = false
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$0.distribution = .fill
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$0.spacing = VDSLayout.space1X
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$0.axis = .horizontal
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$0.backgroundColor = .clear
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}
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private lazy var daysCollectionView: UICollectionView = {
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let collectionView = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())
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collectionView.isScrollEnabled = false
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collectionView.translatesAutoresizingMaskIntoConstraints = false
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collectionView.delegate = self
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collectionView.dataSource = self
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collectionView.showsHorizontalScrollIndicator = false
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collectionView.showsVerticalScrollIndicator = false
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collectionView.backgroundColor = .clear
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collectionView.register(collectionViewCell.self, forCellWithReuseIdentifier: collectionViewCell.identifier)
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return collectionView
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}()
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private var surface: Surface = .light
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private var displayDate: Date = Date()
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internal var previousMonthView = View()
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internal var nextMonthView = View()
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let viewSize = 40.0
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internal var previousButton = ButtonIcon().with {
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$0.kind = .ghost
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$0.iconName = .leftCaret
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$0.iconOffset = .init(x: -2, y: 0)
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$0.icon.size = .small
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$0.size = .small
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}
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internal var nextButton = ButtonIcon().with {
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$0.kind = .ghost
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$0.iconName = .rightCaret
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$0.iconOffset = .init(x: 2, y: 0)
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$0.icon.size = .small
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$0.size = .small
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}
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internal var headerTitle = Label().with {
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$0.translatesAutoresizingMaskIntoConstraints = false
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$0.textAlignment = .center
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$0.numberOfLines = 1
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$0.textStyle = .boldBodySmall
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$0.backgroundColor = .clear
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$0.isAccessibilityElement = true
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}
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internal let daysOfWeek = Date.capitalizedFirstLettersOfWeekdays
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internal let headerTitleTextColorConfiguration = SurfaceColorConfiguration(VDSColor.elementsPrimaryOnlight, VDSColor.elementsPrimaryOndark)
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//--------------------------------------------------
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// MARK: - Initializers
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//--------------------------------------------------
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override init(frame: CGRect) {
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super.init(frame: frame)
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setUp()
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}
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required init?(coder: NSCoder) {
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super.init(coder: coder)
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setUp()
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}
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//--------------------------------------------------
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// MARK: - Private Methods
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//--------------------------------------------------
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/// Configuring the cell with default setup.
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private func setUp() {
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isAccessibilityElement = false
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// stackview
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addSubview(stackView)
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stackView
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.pinTop()
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.pinBottom(VDSLayout.space1X)
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.pinLeading()
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.pinTrailing()
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.height(containerSize.height - VDSLayout.space1X)
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.width(containerSize.width)
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stackView.centerXAnchor.constraint(equalTo: centerXAnchor).activate()
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// top header stack view
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stackView.addArrangedSubview(topHeaderView)
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topHeaderView.heightAnchor.constraint(equalToConstant: viewSize).isActive = true
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topHeaderView.centerXAnchor.constraint(equalTo: centerXAnchor).activate()
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// previous button
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topHeaderView.addArrangedSubview(previousMonthView)
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previousMonthView.widthAnchor.constraint(equalToConstant: viewSize).activate()
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previousMonthView.addSubview(previousButton)
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previousButton.pinCenterY().pinCenterX()
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previousButton.onClick = { _ in self.previousButtonClick() }
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// month year label
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topHeaderView.addArrangedSubview(headerTitle)
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// next button
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topHeaderView.addArrangedSubview(nextMonthView)
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nextMonthView.widthAnchor.constraint(equalToConstant: viewSize).activate()
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nextMonthView.addSubview(nextButton)
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nextButton.pinCenterY().pinCenterX()
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nextButton.onClick = { _ in self.nextButtonClick() }
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// days Collection View
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stackView.addArrangedSubview(daysCollectionView)
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topHeaderView.heightAnchor.constraint(equalToConstant: viewSize).isActive = true
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daysCollectionView.centerXAnchor.constraint(equalTo: centerXAnchor).activate()
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}
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/// Updating UI based on next/previous clicks along with surface.
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/// Updating UI to enable/disable the next & previous buttons, updating header title.
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func update(with surface: Surface, date: Date, nextEnabled: Bool, previousEnabled: Bool) {
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self.surface = surface
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headerTitle.surface = surface
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previousButton.surface = surface
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nextButton.surface = surface
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nextButton.isEnabled = nextEnabled
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previousButton.isEnabled = previousEnabled
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daysCollectionView.reloadData()
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let labelText = date.getMonthName() + " \(date.yearInt)"
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headerTitle.text = labelText
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headerTitle.textColor = headerTitleTextColorConfiguration.getColor(surface)
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}
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func nextButtonClick() {
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nextClicked?()
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}
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func previousButtonClick() {
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previousClicked?()
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}
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}
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extension CalendarHeaderReusableView: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
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public func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
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return daysOfWeek.count
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}
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public func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
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guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: collectionViewCell.identifier, for: indexPath) as? collectionViewCell else { return UICollectionViewCell() }
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cell.updateTitle(text: daysOfWeek[indexPath.row], surface: self.surface)
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return cell
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}
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public func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
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return CGSize(width: viewSize, height: viewSize)
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}
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public func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
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return VDSLayout.space1X
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}
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public func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
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return VDSLayout.space1X
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}
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}
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private class collectionViewCell: UICollectionViewCell {
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static let identifier: String = String(describing: collectionViewCell.self)
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private let textColorConfiguration = SurfaceColorConfiguration(VDSColor.elementsSecondaryOnlight, VDSColor.elementsSecondaryOndark)
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private var title = Label().with {
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$0.translatesAutoresizingMaskIntoConstraints = false
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$0.textAlignment = .center
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$0.numberOfLines = 1
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$0.textStyle = .bodySmall
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$0.backgroundColor = .clear
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$0.isAccessibilityElement = true
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}
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//--------------------------------------------------
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// MARK: - Initializers
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//--------------------------------------------------
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override init(frame: CGRect) {
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super.init(frame: frame)
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setupCell()
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}
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required init?(coder: NSCoder) {
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super.init(coder: coder)
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setupCell()
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}
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func setupCell() {
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addSubview(title)
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title.pinToSuperView()
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}
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func updateTitle(text: String, surface: Surface) {
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title.surface = surface
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title.text = text
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title.textColor = textColorConfiguration.getColor(surface)
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}
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}
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