//
// Copyright 2017 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
//
import SignalServiceKit
import UIKit
open class OWSFlatButton: UIView {
public let button: UIButton
private var pressedBlock: (() -> Void)?
private var upColor: UIColor?
private var downColor: UIColor?
public var cornerRadius: CGFloat {
get {
button.layer.cornerRadius
}
set {
button.layer.cornerRadius = newValue
button.clipsToBounds = newValue > 0
}
}
override public var accessibilityIdentifier: String? {
didSet {
guard let accessibilityIdentifier = self.accessibilityIdentifier else {
return
}
button.accessibilityIdentifier = "\(accessibilityIdentifier).button"
}
}
override public var backgroundColor: UIColor? {
willSet {
owsFailDebug("Use setBackgroundColors(upColor:) instead.")
}
}
public var titleEdgeInsets: UIEdgeInsets {
get {
return button.ows_titleEdgeInsets
}
set {
button.ows_titleEdgeInsets = newValue
}
}
public var contentEdgeInsets: UIEdgeInsets {
get {
return button.ows_contentEdgeInsets
}
set {
button.ows_contentEdgeInsets = newValue
}
}
override public var tintColor: UIColor! {
get {
return button.tintColor
}
set {
button.tintColor = newValue
}
}
public init() {
AssertIsOnMainThread()
button = UIButton(type: .custom)
super.init(frame: CGRect.zero)
createContent()
}
@available(*, unavailable, message: "use other constructor instead.")
public required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private func createContent() {
self.addSubview(button)
button.addTarget(self, action: #selector(buttonPressed), for: .touchUpInside)
button.autoPinEdgesToSuperviewEdges()
}
public class func button(
title: String,
font: UIFont,
titleColor: UIColor,
backgroundColor: UIColor,
width: CGFloat,
height: CGFloat,
target: Any,
selector: Selector,
) -> OWSFlatButton {
let button = OWSFlatButton()
button.setTitle(
title: title,
font: font,
titleColor: titleColor,
)
button.setBackgroundColors(upColor: backgroundColor)
button.useDefaultCornerRadius()
button.setSize(width: width, height: height)
button.addTarget(target: target, selector: selector)
return button
}
public class func button(
title: String,
titleColor: UIColor,
backgroundColor: UIColor,
width: CGFloat,
height: CGFloat,
target: Any,
selector: Selector,
) -> OWSFlatButton {
return OWSFlatButton.button(
title: title,
font: fontForHeight(height),
titleColor: titleColor,
backgroundColor: backgroundColor,
width: width,
height: height,
target: target,
selector: selector,
)
}
public class func insetButton(
title: String,
font: UIFont,
titleColor: UIColor,
backgroundColor: UIColor,
target: Any,
selector: Selector,
) -> OWSFlatButton {
return OWSFlatButton.button(
title: title,
font: font,
titleColor: titleColor,
backgroundColor: backgroundColor,
target: target,
selector: selector,
cornerRadius: CornerStyle.inset,
)
}
private class func button(
title: String,
font: UIFont,
titleColor: UIColor,
backgroundColor: UIColor,
cornerRadius: CGFloat,
) -> OWSFlatButton {
let button = OWSFlatButton()
button.setTitle(
title: title,
font: font,
titleColor: titleColor,
)
button.setBackgroundColors(upColor: backgroundColor)
button.layer.cornerRadius = cornerRadius
button.clipsToBounds = true
return button
}
public class func button(
title: String,
font: UIFont,
titleColor: UIColor,
backgroundColor: UIColor,
target: Any,
selector: Selector,
cornerRadius: CGFloat = CornerStyle.default,
) -> OWSFlatButton {
let button = button(title: title, font: font, titleColor: titleColor, backgroundColor: backgroundColor, cornerRadius: cornerRadius)
button.addTarget(target: target, selector: selector)
return button
}
public class func button(
title: String,
font: UIFont,
titleColor: UIColor,
backgroundColor: UIColor,
action: UIAction,
cornerRadius: CGFloat = CornerStyle.default,
) -> OWSFlatButton {
let button = button(title: title, font: font, titleColor: titleColor, backgroundColor: backgroundColor, cornerRadius: cornerRadius)
button.addAction(action)
return button
}
public class func fontForHeight(_ height: CGFloat) -> UIFont {
// Cap the "button height" at 40pt or button text can look
// excessively large.
let fontPointSize = round(min(40, height) * 0.45)
return UIFont.semiboldFont(ofSize: fontPointSize)
}
public class func heightForFont(_ font: UIFont) -> CGFloat {
font.lineHeight * 2.5
}
// MARK: Methods
public func setTitleColor(_ color: UIColor) {
button.setTitleColor(color, for: .normal)
}
public func setTitle(title: String? = nil, font: UIFont? = nil, titleColor: UIColor? = nil) {
title.map { button.setTitle($0, for: .normal) }
font.map { button.titleLabel?.font = $0 }
titleColor.map { setTitleColor($0) }
}
public func setAttributedTitle(_ title: NSAttributedString) {
button.setAttributedTitle(title, for: .normal)
}
public func setImage(_ image: UIImage) {
button.setImage(image, for: .normal)
}
public func setBackgroundColors(
upColor: UIColor,
downColor: UIColor,
) {
button.setBackgroundImage(UIImage.image(color: upColor), for: .normal)
button.setBackgroundImage(UIImage.image(color: downColor), for: .highlighted)
}
public func setBackgroundColors(upColor: UIColor) {
let downColor = upColor == .clear ? upColor : upColor.withAlphaComponent(0.7)
setBackgroundColors(upColor: upColor, downColor: downColor)
}
public func setSize(width: CGFloat, height: CGFloat) {
button.autoSetDimension(.width, toSize: width)
button.autoSetDimension(.height, toSize: height)
}
public func useDefaultCornerRadius() {
// To my eye, this radius tends to look right regardless of button size
// (within reason) or device size.
button.layer.cornerRadius = 5
button.clipsToBounds = true
}
public func useInsetCornerRadius() {
button.layer.cornerRadius = 14
button.clipsToBounds = true
}
public func setEnabled(_ isEnabled: Bool) {
button.isEnabled = isEnabled
}
public func addTarget(
target: Any,
selector: Selector,
) {
button.addTarget(target, action: selector, for: .touchUpInside)
}
public func addAction(_ action: UIAction) {
button.addAction(action, for: .touchUpInside)
}
public func setPressedBlock(_ pressedBlock: @escaping () -> Void) {
guard self.pressedBlock == nil else { return }
self.pressedBlock = pressedBlock
}
@objc
private func buttonPressed() {
pressedBlock?()
}
public func enableMultilineLabel() {
guard let titleLabel = button.titleLabel else { return }
titleLabel.numberOfLines = 0
titleLabel.lineBreakMode = .byWordWrapping
titleLabel.textAlignment = .center
button.autoPinHeight(
toHeightOf: titleLabel,
relation: .greaterThanOrEqual,
)
}
public var font: UIFont? {
return button.titleLabel?.font
}
public func autoSetMinimumHeighUsingFont(extraVerticalInsets: CGFloat = 0) {
guard let font else {
owsFailDebug("Missing button font.")
return
}
autoSetDimension(
.height,
toSize: Self.heightForFont(font) + CGFloat(extraVerticalInsets * 2.0),
relation: .greaterThanOrEqual,
)
}
public func autoSetHeightUsingFont(extraVerticalInsets: CGFloat = 0) {
guard let font else {
owsFailDebug("Missing button font.")
return
}
autoSetDimension(.height, toSize: Self.heightForFont(font) + CGFloat(extraVerticalInsets * 2.0))
}
override public var intrinsicContentSize: CGSize {
button.intrinsicContentSize
}
public enum CornerStyle {
public static let `default`: CGFloat = 5.0
public static let inset: CGFloat = 14.0
}
}
