mastodon-app-ufficiale-ipho.../MastodonSDK/Sources/MastodonUI/View/Button/AvatarButton.swift

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Swift
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2021-07-21 13:45:24 +02:00
//
// AvatarButton.swift
// Mastodon
//
// Created by MainasuK Cirno on 2021-7-21.
//
import os.log
import UIKit
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import MastodonLocalization
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open class AvatarButton: UIControl {
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// UIControl.Event - Application: 0x0F000000
static let primaryAction = UIControl.Event(rawValue: 1 << 25) // 0x01000000
public var primaryActionState: UIControl.State = .normal
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public var size = CGSize(width: 46, height: 46)
public let avatarImageView = AvatarImageView()
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public override init(frame: CGRect) {
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super.init(frame: frame)
_init()
}
public required init?(coder: NSCoder) {
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super.init(coder: coder)
_init()
}
open func _init() {
avatarImageView.frame = bounds
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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),
])
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isAccessibilityElement = true
accessibilityLabel = L10n.Common.Controls.Status.showUserProfile
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}
public override func layoutSubviews() {
super.layoutSubviews()
updateAppearance()
}
public override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
super.traitCollectionDidChange(previousTraitCollection)
updateAppearance()
}
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open func updateAppearance() {
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avatarImageView.alpha = primaryActionState.contains(.highlighted) ? 0.6 : 1.0
}
}
extension AvatarButton {
public override var intrinsicContentSize: CGSize {
return size
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}
public override func beginTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
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defer { updateAppearance() }
updateState(touch: touch, event: event)
return super.beginTracking(touch, with: event)
}
public override func continueTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
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defer { updateAppearance() }
updateState(touch: touch, event: event)
return super.continueTracking(touch, with: event)
}
public override func endTracking(_ touch: UITouch?, with event: UIEvent?) {
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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)
}
public override func cancelTracking(with event: UIEvent?) {
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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