mirror of
https://gitlab.linphone.org/BC/public/linphone-iphone.git
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99 lines
3.5 KiB
Swift
99 lines
3.5 KiB
Swift
//
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// FloatingScrollDownButton.swift
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// linphone
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//
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// Created by QuentinArguillere on 27/01/2022.
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//
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import Foundation
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import UIKit
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public extension ChatConversationTableView {
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private enum Constants {
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static let trailingValue: CGFloat = 20.0
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static let leadingValue: CGFloat = 85.0
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static let buttonHeight: CGFloat = 40.0
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static let buttonWidth: CGFloat = 40.0
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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tableView.tableFooterView = UIView()
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createFloatingButton()
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}
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override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
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if let lastCellRowIndex = tableView.indexPathsForVisibleRows?.last?.row {
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if( lastCellRowIndex != self.totalNumberOfItems() - 1) {
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self.floatingScrollButton?.isHidden = false
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self.scrollBadge?.isHidden = (self.scrollBadge?.text == nil)
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} else {
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self.floatingScrollButton?.isHidden = true
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self.scrollBadge?.text = nil
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}
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}
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}
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private func createFloatingButton() {
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self.floatingScrollButton = UIButton(type: .custom)
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self.floatingScrollButton?.translatesAutoresizingMaskIntoConstraints = false
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constrainFloatingButtonToWindow()
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self.floatingScrollButton?.setImage(UIImage(named: "scroll_to_bottom_default"), for: .normal)
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self.floatingScrollButton?.addTarget(self, action: #selector(scrollToBottomButtonAction(_:)), for: .touchUpInside)
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self.floatingScrollButton?.isHidden = true;
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addBadgeToButon(badge: nil)
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}
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private func constrainFloatingButtonToWindow() {
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DispatchQueue.main.async {
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guard let keyWindow = UIApplication.shared.keyWindow,
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let floatingButton = self.floatingScrollButton else { return }
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keyWindow.addSubview(floatingButton)
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keyWindow.trailingAnchor.constraint(equalTo: floatingButton.trailingAnchor,
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constant: Constants.trailingValue).isActive = true
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keyWindow.bottomAnchor.constraint(equalTo: floatingButton.bottomAnchor,
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constant: Constants.leadingValue).isActive = true
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floatingButton.widthAnchor.constraint(equalToConstant:
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Constants.buttonWidth).isActive = true
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floatingButton.heightAnchor.constraint(equalToConstant:
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Constants.buttonHeight).isActive = true
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}
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}
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@IBAction private func scrollToBottomButtonAction(_ sender: Any) {
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scroll(toBottom: true)
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}
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private func addBadgeToButon(badge: String?) {
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self.scrollBadge = UILabel()
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self.scrollBadge?.text = badge
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self.scrollBadge?.textColor = UIColor.white
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self.scrollBadge?.backgroundColor = UIColor.red
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self.scrollBadge?.font = UIFont.systemFont(ofSize: 12.0)
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self.scrollBadge?.sizeToFit()
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self.scrollBadge?.textAlignment = .center
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if let badgeSize = self.scrollBadge?.frame.size, let scrollButton = self.floatingScrollButton {
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let height = max(18, Double(badgeSize.height) + 5.0)
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let width = max(height, Double(badgeSize.width) + 10.0)
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var vertical: Double?, horizontal: Double?
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let badgeInset = UIEdgeInsets(top: 20, left: 0, bottom: 0, right: 15)
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vertical = Double(badgeInset.top) - Double(badgeInset.bottom)
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horizontal = Double(badgeInset.left) - Double(badgeInset.right)
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let x = (Double(scrollButton.bounds.size.width) - 10 + horizontal!)
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let y = -(Double(badgeSize.height) / 2) - 10 + vertical!
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self.scrollBadge?.frame = CGRect(x: x, y: y, width: width, height: height)
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self.scrollBadge!.layer.cornerRadius = self.scrollBadge!.frame.height/2
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self.scrollBadge!.layer.masksToBounds = true
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scrollButton.addSubview(self.scrollBadge!)
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}
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}
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}
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