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Merge pull request #1004 from OrkhanAlikhanov/development
RadioButton/CheckButton and RadioButtonGroup/CheckButtonGroup
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| // | ||
| // BaseButtonGroup.swift | ||
| // Material | ||
| // | ||
| // Created by Orkhan Alikhanov on 12/24/17. | ||
| // Copyright © 2017 CosmicMind, Inc. All rights reserved. | ||
| // | ||
|
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| import UIKit | ||
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| open class BaseButtonGroup<T: Button>: View { | ||
|
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| /// Holds reference to buttons within the group. | ||
| open var buttons: [T] = [] { | ||
| didSet { | ||
| oldValue.forEach { | ||
| $0.removeFromSuperview() | ||
| $0.removeTarget(self, action: #selector(didTap(_:)), for: .touchUpInside) | ||
| } | ||
| prepareButtons() | ||
| grid.views = buttons | ||
| grid.axis.rows = buttons.count | ||
| } | ||
| } | ||
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| /// Initializes group with the provided buttons. | ||
| /// | ||
| /// - Parameter buttons: Array of buttons. | ||
| public convenience init(buttons: [T]) { | ||
| self.init(frame: .zero) | ||
| defer { self.buttons = buttons } // defer allows didSet to be called | ||
| } | ||
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| open override func prepare() { | ||
| super.prepare() | ||
| grid.axis.direction = .vertical | ||
| grid.axis.columns = 1 | ||
| } | ||
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| open override var intrinsicContentSize: CGSize { return sizeThatFits(bounds.size) } | ||
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| open override func sizeThatFits(_ size: CGSize) -> CGSize { | ||
| let size = CGSize(width: size.width == 0 ? .greatestFiniteMagnitude : size.width, height: size.height == 0 ? .greatestFiniteMagnitude : size.height) | ||
| let availableW = size.width - grid.contentEdgeInsets.left - grid.contentEdgeInsets.right - grid.layoutEdgeInsets.left - grid.layoutEdgeInsets.right | ||
| let maxW = buttons.reduce(0) { max($0, $1.sizeThatFits(.init(width: availableW, height: .greatestFiniteMagnitude)).width) } | ||
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| let h = buttons.reduce(0) { $0 + $1.sizeThatFits(.init(width: maxW, height: .greatestFiniteMagnitude)).height } | ||
| + grid.contentEdgeInsets.top + grid.contentEdgeInsets.bottom | ||
| + grid.layoutEdgeInsets.top + grid.layoutEdgeInsets.bottom | ||
| + CGFloat(buttons.count - 1) * grid.interimSpace | ||
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| return CGSize(width: maxW + grid.contentEdgeInsets.left + grid.contentEdgeInsets.right + grid.layoutEdgeInsets.left + grid.layoutEdgeInsets.right, height: min(h, size.height)) | ||
| } | ||
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| open override func layoutSubviews() { | ||
| super.layoutSubviews() | ||
| grid.reload() | ||
| } | ||
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| open func didTap(button: T, at index: Int) { } | ||
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| @objc | ||
| private func didTap(_ sender: Button) { | ||
| guard let sender = sender as? T, | ||
| let index = buttons.index(of: sender) | ||
| else { return } | ||
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| didTap(button: sender, at: index) | ||
| } | ||
| } | ||
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| private extension BaseButtonGroup { | ||
| func prepareButtons() { | ||
| buttons.forEach { | ||
| addSubview($0) | ||
| $0.removeTarget(nil, action: nil, for: .allEvents) | ||
| $0.addTarget(self, action: #selector(didTap(_:)), for: .touchUpInside) | ||
| } | ||
| } | ||
| } |
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