mirror of
https://github.com/vector-im/element-ios.git
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114 lines
3.2 KiB
Swift
114 lines
3.2 KiB
Swift
/*
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Copyright 2020 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import Foundation
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final class CloseButton: UIButton, Themable {
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// MARK: - Constants
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private enum CircleBackgroundConstants {
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static let height: CGFloat = 30.0
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static let highlightedAlha: CGFloat = 0.5
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static let normalAlha: CGFloat = 1.0
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}
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// MARK: - Properties
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// MARK: Private
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private var theme: Theme?
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private var circleBackgroundView: UIView!
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// MARK: Public
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override var isHighlighted: Bool {
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didSet {
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self.circleBackgroundView.alpha = self.isHighlighted ? CircleBackgroundConstants.highlightedAlha : CircleBackgroundConstants.normalAlha
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}
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}
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// MARK: - Life cycle
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init() {
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super.init(frame: .zero)
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setup()
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}
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override init(frame: CGRect) {
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super.init(frame: frame)
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setup()
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}
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required init?(coder: NSCoder) {
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super.init(coder: coder)
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setup()
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}
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private func setup() {
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self.backgroundColor = UIColor.clear
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self.setImage(Asset.Images.closeButton.image, for: .normal)
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self.setupCircleView()
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self.update(theme: ThemeService.shared().theme)
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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self.sendSubviewToBack(self.circleBackgroundView)
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self.circleBackgroundView.layer.cornerRadius = self.circleBackgroundView.bounds.height/2
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}
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// MARK: - Private
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private func setupCircleView() {
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// sanity check
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if circleBackgroundView != nil {
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// already set up
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return
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}
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let rect = CGRect(x: 0, y: 0, width: CircleBackgroundConstants.height, height: CircleBackgroundConstants.height)
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let view = UIView(frame: rect)
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view.translatesAutoresizingMaskIntoConstraints = false
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view.isUserInteractionEnabled = false
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view.layer.masksToBounds = true
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self.addSubview(view)
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NSLayoutConstraint.activate([
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view.heightAnchor.constraint(equalToConstant: CircleBackgroundConstants.height),
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view.widthAnchor.constraint(equalTo: view.heightAnchor, multiplier: 1.0),
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view.centerXAnchor.constraint(equalTo: self.centerXAnchor),
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view.centerYAnchor.constraint(equalTo: self.centerYAnchor)
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])
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self.sendSubviewToBack(view)
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self.circleBackgroundView = view
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}
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// MARK: - Themable
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func update(theme: Theme) {
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self.theme = theme
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self.circleBackgroundView.backgroundColor = theme.headerTextSecondaryColor
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}
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}
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