Kurdtvs-Live-Kurdish-TV-Kur.../Mastodon/Scene/Share/View/Button/AvatarButton.swift

130 lines
3.4 KiB
Swift

//
// AvatarButton.swift
// Mastodon
//
// Created by MainasuK Cirno on 2021-7-21.
//
import os.log
import UIKit
class AvatarButton: UIControl {
// UIControl.Event - Application: 0x0F000000
static let primaryAction = UIControl.Event(rawValue: 1 << 25) // 0x01000000
var primaryActionState: UIControl.State = .normal
var avatarImageSize = CGSize(width: 42, height: 42)
let avatarImageView = AvatarImageView()
override init(frame: CGRect) {
super.init(frame: frame)
_init()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
_init()
}
func _init() {
avatarImageView.translatesAutoresizingMaskIntoConstraints = false
addSubview(avatarImageView)
NSLayoutConstraint.activate([
avatarImageView.topAnchor.constraint(equalTo: topAnchor),
avatarImageView.leadingAnchor.constraint(equalTo: leadingAnchor),
avatarImageView.trailingAnchor.constraint(equalTo: trailingAnchor),
avatarImageView.bottomAnchor.constraint(equalTo: bottomAnchor),
])
}
func updateAppearance() {
avatarImageView.alpha = primaryActionState.contains(.highlighted) ? 0.6 : 1.0
}
}
extension AvatarButton {
override var intrinsicContentSize: CGSize {
return avatarImageSize
}
override func beginTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
defer { updateAppearance() }
updateState(touch: touch, event: event)
return super.beginTracking(touch, with: event)
}
override func continueTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
defer { updateAppearance() }
updateState(touch: touch, event: event)
return super.continueTracking(touch, with: event)
}
override func endTracking(_ touch: UITouch?, with event: UIEvent?) {
defer { updateAppearance() }
resetState()
if let touch = touch {
if AvatarButton.isTouching(touch, view: self, event: event) {
sendActions(for: AvatarButton.primaryAction)
} else {
// do nothing
}
}
super.endTracking(touch, with: event)
}
override func cancelTracking(with event: UIEvent?) {
defer { updateAppearance() }
resetState()
super.cancelTracking(with: event)
}
}
extension AvatarButton {
private static func isTouching(_ touch: UITouch, view: UIView, event: UIEvent?) -> Bool {
let location = touch.location(in: view)
return view.point(inside: location, with: event)
}
private func resetState() {
primaryActionState = .normal
}
private func updateState(touch: UITouch, event: UIEvent?) {
primaryActionState = AvatarButton.isTouching(touch, view: self, event: event) ? .highlighted : .normal
}
}
#if canImport(SwiftUI) && DEBUG
import SwiftUI
struct AvatarButton_Previews: PreviewProvider {
static var previews: some View {
UIViewPreview(width: 42) {
let avatarButton = AvatarButton()
avatarButton.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
avatarButton.widthAnchor.constraint(equalToConstant: 42),
avatarButton.heightAnchor.constraint(equalToConstant: 42),
])
return avatarButton
}
.previewLayout(.fixed(width: 42, height: 42))
}
}
#endif