300 lines
16 KiB
Swift
300 lines
16 KiB
Swift
import UIKit
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final class NewConversationButtonSet : UIView {
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private var isUserDragging = false
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private var horizontalButtonConstraints: [NewConversationButton:NSLayoutConstraint] = [:]
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private var verticalButtonConstraints: [NewConversationButton:NSLayoutConstraint] = [:]
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private var expandedButton: NewConversationButton?
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var delegate: NewConversationButtonSetDelegate?
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// MARK: Settings
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private let spacing = Values.largeSpacing
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private let iconSize = CGFloat(24)
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private let maxDragDistance = CGFloat(56)
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private let dragMargin = CGFloat(16)
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// MARK: Components
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private lazy var mainButton = NewConversationButton(isMainButton: true, icon: #imageLiteral(resourceName: "Plus").scaled(to: CGSize(width: iconSize, height: iconSize)))
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private lazy var createNewPrivateChatButton = NewConversationButton(isMainButton: false, icon: #imageLiteral(resourceName: "Message").scaled(to: CGSize(width: iconSize, height: iconSize)))
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private lazy var createNewClosedGroupButton = NewConversationButton(isMainButton: false, icon: #imageLiteral(resourceName: "Group").scaled(to: CGSize(width: iconSize, height: iconSize)))
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private lazy var joinOpenGroupButton = NewConversationButton(isMainButton: false, icon: #imageLiteral(resourceName: "Globe").scaled(to: CGSize(width: iconSize, height: iconSize)))
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// MARK: Initialization
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override init(frame: CGRect) {
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super.init(frame: frame)
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setUpViewHierarchy()
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}
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required init?(coder: NSCoder) {
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super.init(coder: coder)
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setUpViewHierarchy()
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}
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private func setUpViewHierarchy() {
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let inset = (Values.newConversationButtonExpandedSize - Values.newConversationButtonCollapsedSize) / 2
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addSubview(joinOpenGroupButton)
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horizontalButtonConstraints[joinOpenGroupButton] = joinOpenGroupButton.pin(.left, to: .left, of: self, withInset: inset)
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verticalButtonConstraints[joinOpenGroupButton] = joinOpenGroupButton.pin(.bottom, to: .bottom, of: self, withInset: -inset)
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addSubview(createNewPrivateChatButton)
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createNewPrivateChatButton.center(.horizontal, in: self)
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verticalButtonConstraints[createNewPrivateChatButton] = createNewPrivateChatButton.pin(.top, to: .top, of: self, withInset: inset)
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addSubview(createNewClosedGroupButton)
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horizontalButtonConstraints[createNewClosedGroupButton] = createNewClosedGroupButton.pin(.right, to: .right, of: self, withInset: -inset)
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verticalButtonConstraints[createNewClosedGroupButton] = createNewClosedGroupButton.pin(.bottom, to: .bottom, of: self, withInset: -inset)
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addSubview(mainButton)
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mainButton.center(.horizontal, in: self)
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mainButton.pin(.bottom, to: .bottom, of: self, withInset: -inset)
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let width = 2 * Values.newConversationButtonExpandedSize + 2 * spacing + Values.newConversationButtonCollapsedSize
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set(.width, to: width)
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let height = Values.newConversationButtonExpandedSize + spacing + Values.newConversationButtonCollapsedSize
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set(.height, to: height)
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collapse(withAnimation: false)
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isUserInteractionEnabled = true
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let joinOpenGroupButtonTapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(handleJoinOpenGroupButtonTapped))
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joinOpenGroupButton.addGestureRecognizer(joinOpenGroupButtonTapGestureRecognizer)
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let createNewPrivateChatButtonTapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(handleCreateNewPrivateChatButtonTapped))
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createNewPrivateChatButton.addGestureRecognizer(createNewPrivateChatButtonTapGestureRecognizer)
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let createNewClosedGroupButtonTapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(handleCreateNewClosedGroupButtonTapped))
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createNewClosedGroupButton.addGestureRecognizer(createNewClosedGroupButtonTapGestureRecognizer)
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}
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// MARK: Interaction
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@objc private func handleJoinOpenGroupButtonTapped() { delegate?.joinOpenGroup() }
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@objc private func handleCreateNewPrivateChatButtonTapped() { delegate?.createNewPrivateChat() }
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@objc private func handleCreateNewClosedGroupButtonTapped() { delegate?.createNewClosedGroup() }
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private func expand(isUserDragging: Bool) {
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let buttons = [ joinOpenGroupButton, createNewPrivateChatButton, createNewClosedGroupButton ]
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UIView.animate(withDuration: 0.25, animations: {
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buttons.forEach { $0.alpha = 1 }
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let inset = (Values.newConversationButtonExpandedSize - Values.newConversationButtonCollapsedSize) / 2
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let size = Values.newConversationButtonCollapsedSize
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self.joinOpenGroupButton.frame = CGRect(origin: CGPoint(x: inset, y: self.height() - size - inset), size: CGSize(width: size, height: size))
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self.createNewPrivateChatButton.frame = CGRect(center: CGPoint(x: self.bounds.center.x, y: inset + size / 2), size: CGSize(width: size, height: size))
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self.createNewClosedGroupButton.frame = CGRect(origin: CGPoint(x: self.width() - size - inset, y: self.height() - size - inset), size: CGSize(width: size, height: size))
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}, completion: { _ in
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self.isUserDragging = isUserDragging
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})
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}
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private func collapse(withAnimation isAnimated: Bool) {
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isUserDragging = false
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let buttons = [ joinOpenGroupButton, createNewPrivateChatButton, createNewClosedGroupButton ]
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UIView.animate(withDuration: isAnimated ? 0.25 : 0) {
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buttons.forEach { button in
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button.alpha = 0
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let size = Values.newConversationButtonCollapsedSize
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button.frame = CGRect(center: self.mainButton.center, size: CGSize(width: size, height: size))
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}
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}
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}
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private func reset() {
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let mainButtonLocationInSelfCoordinates = CGPoint(x: width() / 2, y: height() - Values.newConversationButtonExpandedSize / 2)
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let mainButtonSize = mainButton.frame.size
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UIView.animate(withDuration: 0.25) {
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self.mainButton.frame = CGRect(center: mainButtonLocationInSelfCoordinates, size: mainButtonSize)
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self.mainButton.alpha = 1
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}
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if let expandedButton = expandedButton { collapse(expandedButton) }
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expandedButton = nil
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Timer.scheduledTimer(withTimeInterval: 0.25, repeats: false) { _ in
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self.collapse(withAnimation: true)
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}
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}
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override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first, mainButton.contains(touch), !isUserDragging else { return }
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UIImpactFeedbackGenerator(style: .heavy).impactOccurred()
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expand(isUserDragging: true)
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}
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override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first, isUserDragging else { return }
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let mainButtonSize = mainButton.frame.size
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let mainButtonLocationInSelfCoordinates = CGPoint(x: width() / 2, y: height() - Values.newConversationButtonExpandedSize / 2)
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let touchLocationInSelfCoordinates = touch.location(in: self)
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mainButton.frame = CGRect(center: touchLocationInSelfCoordinates, size: mainButtonSize)
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mainButton.alpha = 1 - (touchLocationInSelfCoordinates.distance(to: mainButtonLocationInSelfCoordinates) / maxDragDistance)
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let buttons = [ joinOpenGroupButton, createNewPrivateChatButton, createNewClosedGroupButton ]
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let buttonToExpand = buttons.first { button in
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var hasUserDraggedBeyondButton = false
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if button == joinOpenGroupButton && touch.isLeft(of: joinOpenGroupButton, with: dragMargin) { hasUserDraggedBeyondButton = true }
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if button == createNewPrivateChatButton && touch.isAbove(createNewPrivateChatButton, with: dragMargin) { hasUserDraggedBeyondButton = true }
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if button == createNewClosedGroupButton && touch.isRight(of: createNewClosedGroupButton, with: dragMargin) { hasUserDraggedBeyondButton = true }
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return button.contains(touch) || hasUserDraggedBeyondButton
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}
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if let buttonToExpand = buttonToExpand {
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guard buttonToExpand != expandedButton else { return }
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if let expandedButton = expandedButton { collapse(expandedButton) }
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expand(buttonToExpand)
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expandedButton = buttonToExpand
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} else {
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if let expandedButton = expandedButton { collapse(expandedButton) }
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expandedButton = nil
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}
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}
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override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first, isUserDragging else { return }
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if joinOpenGroupButton.contains(touch) || touch.isLeft(of: joinOpenGroupButton, with: dragMargin) { delegate?.joinOpenGroup() }
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else if createNewPrivateChatButton.contains(touch) || touch.isAbove(createNewPrivateChatButton, with: dragMargin) { delegate?.createNewPrivateChat() }
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else if createNewClosedGroupButton.contains(touch) || touch.isRight(of: createNewClosedGroupButton, with: dragMargin) { delegate?.createNewClosedGroup() }
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reset()
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}
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override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard isUserDragging else { return }
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reset()
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}
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private func expand(_ button: NewConversationButton) {
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if let horizontalConstraint = horizontalButtonConstraints[button] { horizontalConstraint.constant = 0 }
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if let verticalConstraint = verticalButtonConstraints[button] { verticalConstraint.constant = 0 }
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let size = Values.newConversationButtonExpandedSize
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let frame = CGRect(center: button.center, size: CGSize(width: size, height: size))
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button.widthConstraint.constant = size
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button.heightConstraint.constant = size
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UIView.animate(withDuration: 0.25) {
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self.layoutIfNeeded()
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button.frame = frame
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button.layer.cornerRadius = size / 2
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let glowColor = Colors.newConversationButtonShadow
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let glowConfiguration = UIView.CircularGlowConfiguration(size: size, color: glowColor, isAnimated: true, radius: isLightMode ? 4 : 6)
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button.setCircularGlow(with: glowConfiguration)
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button.backgroundColor = Colors.accent
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}
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}
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private func collapse(_ button: NewConversationButton) {
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let inset = (Values.newConversationButtonExpandedSize - Values.newConversationButtonCollapsedSize) / 2
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if joinOpenGroupButton == expandedButton {
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horizontalButtonConstraints[joinOpenGroupButton]!.constant = inset
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verticalButtonConstraints[joinOpenGroupButton]!.constant = -inset
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} else if createNewPrivateChatButton == expandedButton {
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verticalButtonConstraints[createNewPrivateChatButton]!.constant = inset
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} else if createNewClosedGroupButton == expandedButton {
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horizontalButtonConstraints[createNewClosedGroupButton]!.constant = -inset
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verticalButtonConstraints[createNewClosedGroupButton]!.constant = -inset
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}
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let size = Values.newConversationButtonCollapsedSize
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let frame = CGRect(center: button.center, size: CGSize(width: size, height: size))
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button.widthConstraint.constant = size
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button.heightConstraint.constant = size
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UIView.animate(withDuration: 0.25) {
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self.layoutIfNeeded()
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button.frame = frame
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button.layer.cornerRadius = size / 2
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let glowColor = isLightMode ? UIColor.black.withAlphaComponent(0.4) : UIColor.black
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let glowConfiguration = UIView.CircularGlowConfiguration(size: size, color: glowColor, isAnimated: true, radius: isLightMode ? 4 : 6)
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button.setCircularGlow(with: glowConfiguration)
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button.backgroundColor = Colors.newConversationButtonCollapsedBackground
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}
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}
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override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
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if !bounds.contains(point), isUserDragging { collapse(withAnimation: true) }
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return super.hitTest(point, with: event)
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}
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}
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// MARK: Delegate
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protocol NewConversationButtonSetDelegate {
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func joinOpenGroup()
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func createNewPrivateChat()
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func createNewClosedGroup()
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}
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// MARK: Button
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private final class NewConversationButton : UIImageView {
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private let isMainButton: Bool
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private let icon: UIImage
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var widthConstraint: NSLayoutConstraint!
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var heightConstraint: NSLayoutConstraint!
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init(isMainButton: Bool, icon: UIImage) {
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self.isMainButton = isMainButton
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self.icon = icon
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super.init(frame: CGRect.zero)
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setUpViewHierarchy()
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NotificationCenter.default.addObserver(self, selector: #selector(handleAppModeChangedNotification(_:)), name: .appModeChanged, object: nil)
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}
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override init(frame: CGRect) {
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preconditionFailure("Use init(isMainButton:) instead.")
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}
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required init?(coder: NSCoder) {
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preconditionFailure("Use init(isMainButton:) instead.")
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}
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deinit {
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NotificationCenter.default.removeObserver(self)
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}
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private func setUpViewHierarchy(isUpdate: Bool = false) {
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let newConversationButtonCollapsedBackground = isLightMode ? UIColor(hex: 0xF5F5F5) : UIColor(hex: 0x1F1F1F)
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backgroundColor = isMainButton ? Colors.accent : newConversationButtonCollapsedBackground
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let size = Values.newConversationButtonCollapsedSize
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layer.cornerRadius = size / 2
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let glowColor = isMainButton ? Colors.newConversationButtonShadow : (isLightMode ? UIColor.black.withAlphaComponent(0.4) : UIColor.black)
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let glowConfiguration = UIView.CircularGlowConfiguration(size: size, color: glowColor, isAnimated: false, radius: isLightMode ? 4 : 6)
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setCircularGlow(with: glowConfiguration)
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layer.masksToBounds = false
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let iconColor = (isMainButton && isLightMode) ? UIColor.white : (isLightMode ? UIColor.black : UIColor.white)
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image = icon.asTintedImage(color: iconColor)!
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contentMode = .center
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if !isUpdate {
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widthConstraint = set(.width, to: size)
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heightConstraint = set(.height, to: size)
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}
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}
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@objc private func handleAppModeChangedNotification(_ notification: Notification) {
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setUpViewHierarchy(isUpdate: true)
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}
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}
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// MARK: Convenience
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private extension UIView {
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func contains(_ touch: UITouch) -> Bool {
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return bounds.contains(touch.location(in: self))
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}
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}
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private extension UITouch {
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func isLeft(of view: UIView, with margin: CGFloat = 0) -> Bool {
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return isContainedVertically(in: view, with: margin) && location(in: view).x < view.bounds.minX
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}
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func isAbove(_ view: UIView, with margin: CGFloat = 0) -> Bool {
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return isContainedHorizontally(in: view, with: margin) && location(in: view).y < view.bounds.minY
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}
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func isRight(of view: UIView, with margin: CGFloat = 0) -> Bool {
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return isContainedVertically(in: view, with: margin) && location(in: view).x > view.bounds.maxX
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}
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func isBelow(_ view: UIView, with margin: CGFloat = 0) -> Bool {
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return isContainedHorizontally(in: view, with: margin) && location(in: view).y > view.bounds.maxY
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}
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private func isContainedHorizontally(in view: UIView, with margin: CGFloat = 0) -> Bool {
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return ((view.bounds.minX - margin)...(view.bounds.maxX + margin)) ~= location(in: view).x
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}
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private func isContainedVertically(in view: UIView, with margin: CGFloat = 0) -> Bool {
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return ((view.bounds.minY - margin)...(view.bounds.maxY + margin)) ~= location(in: view).y
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}
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}
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private extension CGPoint {
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func distance(to otherPoint: CGPoint) -> CGFloat {
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return sqrt(pow(self.x - otherPoint.x, 2) + pow(self.y - otherPoint.y, 2))
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}
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}
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