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Merge pull request #13 from twicketapp/add-ability-to-disable-shadow
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Add isSliderShadowHidden to be able to hide slider's shadow
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@polqf
polqf authored Jan 31, 2017
2 parents 503e7ce + cf05985 commit a86e21b
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Showing 3 changed files with 49 additions and 27 deletions.
70 changes: 44 additions & 26 deletions TwicketSegmentedControl/TwicketSegmentedControl.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@ public protocol TwicketSegmentedControlDelegate: class {
open class TwicketSegmentedControl: UIControl {
open static let height: CGFloat = Constants.height + Constants.topBottomMargin * 2

fileprivate struct Constants {
private struct Constants {
static let height: CGFloat = 30
static let topBottomMargin: CGFloat = 5
static let leadingTrailingMargin: CGFloat = 10
Expand Down Expand Up @@ -84,7 +84,7 @@ open class TwicketSegmentedControl: UIControl {
open var sliderBackgroundColor: UIColor = Palette.sliderColor {
didSet {
selectedContainerView.backgroundColor = sliderBackgroundColor
selectedContainerView.addShadow(with: sliderBackgroundColor)
if !isSliderShadowHidden { selectedContainerView.addShadow(with: sliderBackgroundColor) }
}
}

Expand All @@ -94,24 +94,30 @@ open class TwicketSegmentedControl: UIControl {
}
}

open var isSliderShadowHidden: Bool = false {
didSet {
updateShadow(with: sliderBackgroundColor, hidden: isSliderShadowHidden)
}
}

private(set) open var selectedSegmentIndex: Int = 0

fileprivate var segments: [String] = []
private var segments: [String] = []

fileprivate var numberOfSegments: Int {
private var numberOfSegments: Int {
return segments.count
}

fileprivate var segmentWidth: CGFloat {
private var segmentWidth: CGFloat {
return self.backgroundView.frame.width / CGFloat(numberOfSegments)
}

fileprivate var correction: CGFloat = 0
private var correction: CGFloat = 0

fileprivate lazy var containerView: UIView = UIView()
fileprivate lazy var backgroundView: UIView = UIView()
fileprivate lazy var selectedContainerView: UIView = UIView()
fileprivate lazy var sliderView: SliderView = SliderView()
private lazy var containerView: UIView = UIView()
private lazy var backgroundView: UIView = UIView()
private lazy var selectedContainerView: UIView = UIView()
private lazy var sliderView: SliderView = SliderView()

public override init(frame: CGRect) {
super.init(frame: frame)
Expand All @@ -125,7 +131,7 @@ open class TwicketSegmentedControl: UIControl {

// MARK: Setup

fileprivate func setup() {
private func setup() {
addSubview(containerView)
containerView.addSubview(backgroundView)
containerView.addSubview(selectedContainerView)
Expand Down Expand Up @@ -154,7 +160,7 @@ open class TwicketSegmentedControl: UIControl {
setupAutoresizingMasks()
}

fileprivate func configureViews() {
private func configureViews() {
containerView.frame = CGRect(x: Constants.leadingTrailingMargin,
y: Constants.topBottomMargin,
width: bounds.width - Constants.leadingTrailingMargin * 2,
Expand All @@ -172,24 +178,36 @@ open class TwicketSegmentedControl: UIControl {
backgroundView.backgroundColor = segmentsBackgroundColor
selectedContainerView.backgroundColor = sliderBackgroundColor

selectedContainerView.addShadow(with: sliderBackgroundColor)
if !isSliderShadowHidden {
selectedContainerView.addShadow(with: sliderBackgroundColor)
}
}

fileprivate func setupAutoresizingMasks() {
private func setupAutoresizingMasks() {
containerView.autoresizingMask = [.flexibleWidth]
backgroundView.autoresizingMask = [.flexibleWidth]
selectedContainerView.autoresizingMask = [.flexibleWidth]
sliderView.autoresizingMask = [.flexibleLeftMargin, .flexibleRightMargin, .flexibleWidth]
}

private func updateShadow(with color: UIColor, hidden: Bool) {
if hidden {
selectedContainerView.removeShadow()
sliderView.sliderMaskView.removeShadow()
} else {
selectedContainerView.addShadow(with: sliderBackgroundColor)
sliderView.sliderMaskView.addShadow(with: .black)
}
}

// MARK: Labels

fileprivate func clearLabels() {
private func clearLabels() {
backgroundView.subviews.forEach { $0.removeFromSuperview() }
selectedContainerView.subviews.forEach { $0.removeFromSuperview() }
}

fileprivate func createLabel(with text: String, at index: Int, selected: Bool) -> UILabel {
private func createLabel(with text: String, at index: Int, selected: Bool) -> UILabel {
let rect = CGRect(x: CGFloat(index) * segmentWidth, y: 0, width: segmentWidth, height: backgroundView.frame.height)
let label = UILabel(frame: rect)
label.text = text
Expand All @@ -200,33 +218,33 @@ open class TwicketSegmentedControl: UIControl {
return label
}

fileprivate func updateLabelsColor(with color: UIColor, selected: Bool) {
private func updateLabelsColor(with color: UIColor, selected: Bool) {
let containerView = selected ? selectedContainerView : backgroundView
containerView.subviews.forEach { ($0 as? UILabel)?.textColor = color }
}

fileprivate func updateLabelsFont(with font: UIFont) {
private func updateLabelsFont(with font: UIFont) {
selectedContainerView.subviews.forEach { ($0 as? UILabel)?.font = font }
backgroundView.subviews.forEach { ($0 as? UILabel)?.font = font }
}

// MARK: Tap gestures

fileprivate func addTapGesture() {
private func addTapGesture() {
let tap = UITapGestureRecognizer(target: self, action: #selector(didTap))
addGestureRecognizer(tap)
}

fileprivate func addDragGesture() {
private func addDragGesture() {
let drag = UIPanGestureRecognizer(target: self, action: #selector(didPan))
sliderView.addGestureRecognizer(drag)
}

@objc fileprivate func didTap(tapGesture: UITapGestureRecognizer) {
@objc private func didTap(tapGesture: UITapGestureRecognizer) {
moveToNearestPoint(basedOn: tapGesture)
}

@objc fileprivate func didPan(panGesture: UIPanGestureRecognizer) {
@objc private func didPan(panGesture: UIPanGestureRecognizer) {
switch panGesture.state {
case .cancelled, .ended, .failed:
moveToNearestPoint(basedOn: panGesture, velocity: panGesture.velocity(in: sliderView))
Expand All @@ -241,7 +259,7 @@ open class TwicketSegmentedControl: UIControl {

// MARK: Slider position

fileprivate func moveToNearestPoint(basedOn gesture: UIGestureRecognizer, velocity: CGPoint? = nil) {
private func moveToNearestPoint(basedOn gesture: UIGestureRecognizer, velocity: CGPoint? = nil) {
var location = gesture.location(in: self)
if let velocity = velocity {
let offset = velocity.x / 12
Expand All @@ -259,19 +277,19 @@ open class TwicketSegmentedControl: UIControl {
selectedSegmentIndex = index
}

fileprivate func segmentIndex(for point: CGPoint) -> Int {
private func segmentIndex(for point: CGPoint) -> Int {
var index = Int(point.x / sliderView.frame.width)
if index < 0 { index = 0 }
if index > numberOfSegments - 1 { index = numberOfSegments - 1 }
return index
}

fileprivate func center(at index: Int) -> CGFloat {
private func center(at index: Int) -> CGFloat {
let xOffset = CGFloat(index) * sliderView.frame.width + sliderView.frame.width / 2
return xOffset
}

fileprivate func animate(to position: CGFloat) {
private func animate(to position: CGFloat) {
UIView.animate(withDuration: 0.2) {
self.sliderView.center.x = position
}
Expand Down
4 changes: 4 additions & 0 deletions TwicketSegmentedControl/UIViewShadowExtension.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -15,4 +15,8 @@ extension UIView {
layer.shadowOpacity = 0.7
layer.shadowOffset = CGSize(width: 0, height: 5)
}

func removeShadow() {
layer.shadowOpacity = 0
}
}
2 changes: 1 addition & 1 deletion TwicketSegmentedControlDemo/TwicketSegmentedControlDemo/ViewController.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,6 @@ class ViewController: UIViewController {

extension ViewController: TwicketSegmentedControlDelegate {
func didSelect(_ segmentIndex: Int) {
print("Selected idex: \(segmentIndex)")
print("Selected index: \(segmentIndex)")
}
}

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