mastodon-ios/Mastodon/Scene/Share/View/Decoration/SawToothView.swift

62 lines
1.7 KiB
Swift

//
// SawToothView.swift
// Mastodon
//
// Created by sxiaojian on 2021/3/17.
//
import Foundation
import UIKit
import Combine
final class SawToothView: UIView {
static let widthUint = 8
var disposeBag = Set<AnyCancellable>()
override init(frame: CGRect) {
super.init(frame: frame)
_init()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
_init()
}
func _init() {
setupBackgroundColor(theme: ThemeService.shared.currentTheme.value)
ThemeService.shared.currentTheme
.receive(on: RunLoop.main)
.sink { [weak self] theme in
guard let self = self else { return }
self.setupBackgroundColor(theme: theme)
}
.store(in: &disposeBag)
}
private func setupBackgroundColor(theme: Theme) {
backgroundColor = theme.secondarySystemBackgroundColor
setNeedsDisplay()
}
override func draw(_ rect: CGRect) {
let bezierPath = UIBezierPath()
let bottomY = rect.height
let topY = 0
let count = Int(ceil(rect.width / CGFloat(SawToothView.widthUint)))
bezierPath.move(to: CGPoint(x: 0, y: bottomY))
for n in 0 ..< count {
bezierPath.addLine(to: CGPoint(x: CGFloat((Double(n) + 0.5) * Double(SawToothView.widthUint)), y: CGFloat(topY)))
bezierPath.addLine(to: CGPoint(x: CGFloat((Double(n) + 1) * Double(SawToothView.widthUint)), y: CGFloat(bottomY)))
}
bezierPath.addLine(to: CGPoint(x: 0, y: bottomY))
bezierPath.close()
ThemeService.shared.currentTheme.value.tableViewCellBackgroundColor.setFill()
bezierPath.fill()
bezierPath.lineWidth = 0
bezierPath.stroke()
}
}