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@@ -0,0 +1,69 @@
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+//
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+// MessageCounter.swift
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+// deltachat-ios
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+//
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+// Created by Macci on 22.10.19.
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+// Copyright © 2019 Jonas Reinsch. All rights reserved.
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+//
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+
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+import Foundation
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+import UIKit
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+
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+class MessageCounter: UIView {
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+
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+ private let minSize: CGFloat
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+ private var widthConstraint: NSLayoutConstraint?
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+ private let padding: CGFloat = 4
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+
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+ private var label: UILabel = {
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+ let label = UILabel()
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+ label.adjustsFontSizeToFitWidth = true
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+ label.textAlignment = NSTextAlignment.center
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+ label.textColor = UIColor.white
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+ label.translatesAutoresizingMaskIntoConstraints = false
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+ return label
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+ }()
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+
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+ convenience init(count: Int, size: CGFloat) {
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+ self.init(size: size)
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+ }
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+
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+ init(size: CGFloat) {
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+ self.minSize = size
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+ super.init(frame: CGRect(x: 0, y: 0, width: 0, height: 0))
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+ let radius = size / 2
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+ layer.cornerRadius = radius
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+ translatesAutoresizingMaskIntoConstraints = false
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+ self.backgroundColor = UIColor.red
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+ addConstraint(constraintHeightTo(size))
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+ widthConstraint = constraintWidthTo(size)
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+ addConstraint(widthConstraint!)
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+ addSubview(label)
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+ let labelConstraints = [ label.constraintAlignLeadingTo(self),
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+ label.constraintAlignTrailingTo(self),
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+ label.constraintCenterYTo(self) ]
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+ self.addConstraints(labelConstraints)
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+ isHidden = true
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+ }
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+
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+ required init?(coder _: NSCoder) {
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+ fatalError("init(coder:) has not been implemented")
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+ }
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+
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+ public func setCount(_ msgNo: Int) {
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+ let countString = NSAttributedString(string: String(msgNo), attributes: [.font: UIFont.systemFont(ofSize: 12)])
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+ let countStringSize = countString.width(considering: minSize) + padding
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+ if countStringSize > minSize {
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+ removeConstraint(widthConstraint!)
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+ widthConstraint = constraintWidthTo(countStringSize)
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+ addConstraint(widthConstraint!)
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+ } else if frame.width > minSize {
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+ removeConstraint(widthConstraint!)
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+ widthConstraint = constraintWidthTo(minSize)
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+ addConstraint(widthConstraint!)
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+ }
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+ label.attributedText = countString
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+ isHidden = (msgNo <= 0)
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+ }
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+
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+}
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björn petersen