138 lines
3.6 KiB
Swift
138 lines
3.6 KiB
Swift
//
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// Copyright 2018 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import UIKit
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import SignalMessaging
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@objc
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open class OWSButton: UIButton {
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@objc
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public var block: () -> Void = { }
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public var dimsWhenHighlighted = false {
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didSet { updateAlpha() }
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}
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public var dimsWhenDisabled = false {
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didSet { updateAlpha() }
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}
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public override var isHighlighted: Bool {
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didSet { updateAlpha() }
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}
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public override var isEnabled: Bool {
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didSet { updateAlpha() }
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}
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// MARK: -
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@objc
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public init(block: @escaping () -> Void = { }) {
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super.init(frame: .zero)
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self.block = block
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addTarget(self, action: #selector(didTap), for: .touchUpInside)
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}
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@objc
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public init(title: String, block: @escaping () -> Void = { }) {
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super.init(frame: .zero)
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self.block = block
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addTarget(self, action: #selector(didTap), for: .touchUpInside)
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setTitle(title, for: .normal)
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}
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@objc
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public init(
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imageName: String,
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tintColor: UIColor?,
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block: @escaping () -> Void = {}
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) {
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super.init(frame: .zero)
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self.block = block
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addTarget(self, action: #selector(didTap), for: .touchUpInside)
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setImage(imageName: imageName)
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self.tintColor = tintColor
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}
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@objc
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public func setImage(imageName: String?) {
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guard let imageName = imageName else {
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setImage(nil, for: .normal)
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return
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}
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if let image = UIImage(named: imageName) {
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setImage(image.withRenderingMode(.alwaysTemplate), for: .normal)
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} else {
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owsFailDebug("Missing asset: \(imageName)")
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}
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}
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public required init?(coder aDecoder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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// MARK: - Common Style Reuse
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@objc
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public class func sendButton(imageName: String, block: @escaping () -> Void) -> OWSButton {
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let button = OWSButton(imageName: imageName, tintColor: .white, block: block)
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let buttonWidth: CGFloat = 40
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button.layer.cornerRadius = buttonWidth / 2
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button.autoSetDimensions(to: CGSize(square: buttonWidth))
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button.backgroundColor = .ows_accentBlue
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return button
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}
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/// Mimics a UIBarButtonItem of type .cancel, but with a shadow.
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@objc
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public class func shadowedCancelButton(block: @escaping () -> Void) -> OWSButton {
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let cancelButton = OWSButton(title: CommonStrings.cancelButton, block: block)
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cancelButton.setTitleColor(.white, for: .normal)
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if let titleLabel = cancelButton.titleLabel {
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titleLabel.font = UIFont.systemFont(ofSize: 18.0)
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titleLabel.layer.shadowColor = UIColor.black.cgColor
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titleLabel.setShadow()
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} else {
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owsFailDebug("Missing titleLabel.")
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}
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cancelButton.sizeToFit()
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return cancelButton
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}
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@objc
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public class func navigationBarButton(imageName: String, block: @escaping () -> Void) -> OWSButton {
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let button = OWSButton(imageName: imageName, tintColor: .white, block: block)
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button.layer.shadowColor = UIColor.black.cgColor
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button.layer.shadowRadius = 2
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button.layer.shadowOpacity = 0.66
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button.layer.shadowOffset = .zero
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return button
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}
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// MARK: -
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@objc
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func didTap() {
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block()
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}
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private func updateAlpha() {
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let isDimmed = (
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(dimsWhenHighlighted && isHighlighted) ||
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(dimsWhenDisabled && !isEnabled)
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)
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alpha = isDimmed ? 0.4 : 1
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}
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}
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