120 lines
4.7 KiB
Swift
120 lines
4.7 KiB
Swift
//
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// TimelineLoaderTableViewCell.swift
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// Mastodon
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//
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// Created by sxiaojian on 2021/2/3.
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//
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import UIKit
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import Combine
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class TimelineLoaderTableViewCell: UITableViewCell {
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static let buttonHeight: CGFloat = 44
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static let buttonMargin: CGFloat = 12
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static let cellHeight: CGFloat = buttonHeight + 2 * buttonMargin
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static let labelFont = UIFontMetrics(forTextStyle: .body).scaledFont(for: .systemFont(ofSize: 17, weight: .medium))
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var disposeBag = Set<AnyCancellable>()
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let stackView = UIStackView()
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let loadMoreButton: UIButton = {
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let button = HighlightDimmableButton()
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button.titleLabel?.font = TimelineLoaderTableViewCell.labelFont
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button.backgroundColor = Asset.Colors.Background.systemBackground.color
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button.setTitleColor(Asset.Colors.Button.normal.color, for: .normal)
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button.setTitle(L10n.Common.Controls.Timeline.Loader.loadMissingPosts, for: .normal)
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button.setTitle("", for: .disabled)
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return button
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}()
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let loadMoreLabel: UILabel = {
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let label = UILabel()
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label.font = TimelineLoaderTableViewCell.labelFont
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return label
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}()
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let activityIndicatorView: UIActivityIndicatorView = {
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let activityIndicatorView = UIActivityIndicatorView(style: .medium)
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activityIndicatorView.tintColor = Asset.Colors.Label.secondary.color
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activityIndicatorView.hidesWhenStopped = true
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return activityIndicatorView
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}()
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override func prepareForReuse() {
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super.prepareForReuse()
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disposeBag.removeAll()
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}
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override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
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super.init(style: style, reuseIdentifier: reuseIdentifier)
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_init()
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}
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required init?(coder: NSCoder) {
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super.init(coder: coder)
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_init()
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}
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func startAnimating() {
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activityIndicatorView.startAnimating()
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self.loadMoreButton.isEnabled = false
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self.loadMoreLabel.textColor = Asset.Colors.Label.secondary.color
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self.loadMoreLabel.text = L10n.Common.Controls.Timeline.Loader.loadingMissingPosts
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}
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func stopAnimating() {
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activityIndicatorView.stopAnimating()
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self.loadMoreButton.isEnabled = true
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self.loadMoreLabel.textColor = Asset.Colors.brandBlue.color
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self.loadMoreLabel.text = ""
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}
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func _init() {
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selectionStyle = .none
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backgroundColor = .clear
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loadMoreButton.translatesAutoresizingMaskIntoConstraints = false
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contentView.addSubview(loadMoreButton)
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NSLayoutConstraint.activate([
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loadMoreButton.topAnchor.constraint(equalTo: contentView.topAnchor, constant: TimelineLoaderTableViewCell.buttonMargin),
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loadMoreButton.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
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contentView.trailingAnchor.constraint(equalTo: loadMoreButton.trailingAnchor),
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contentView.bottomAnchor.constraint(equalTo: loadMoreButton.bottomAnchor, constant: TimelineLoaderTableViewCell.buttonMargin),
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loadMoreButton.heightAnchor.constraint(equalToConstant: TimelineLoaderTableViewCell.buttonHeight).priority(.required - 1),
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])
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// use stack view to alignlment content center
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stackView.spacing = 4
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stackView.axis = .horizontal
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stackView.alignment = .center
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stackView.translatesAutoresizingMaskIntoConstraints = false
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stackView.isUserInteractionEnabled = false
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contentView.addSubview(stackView)
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NSLayoutConstraint.activate([
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stackView.topAnchor.constraint(equalTo: loadMoreButton.topAnchor),
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stackView.leadingAnchor.constraint(equalTo: loadMoreButton.leadingAnchor),
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stackView.trailingAnchor.constraint(equalTo: loadMoreButton.trailingAnchor),
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stackView.bottomAnchor.constraint(equalTo: loadMoreButton.bottomAnchor),
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])
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let leftPaddingView = UIView()
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leftPaddingView.translatesAutoresizingMaskIntoConstraints = false
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stackView.addArrangedSubview(leftPaddingView)
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stackView.addArrangedSubview(activityIndicatorView)
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stackView.addArrangedSubview(loadMoreLabel)
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let rightPaddingView = UIView()
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rightPaddingView.translatesAutoresizingMaskIntoConstraints = false
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stackView.addArrangedSubview(rightPaddingView)
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NSLayoutConstraint.activate([
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leftPaddingView.widthAnchor.constraint(equalTo: rightPaddingView.widthAnchor, multiplier: 1.0),
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])
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// default set hidden and let subclass override it
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loadMoreButton.isHidden = true
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loadMoreLabel.isHidden = true
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activityIndicatorView.isHidden = true
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}
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}
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