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Support custom indicator images for PageControl (Closes #474) #475

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Support custom indicator images for PageControl (Closes #474) #475

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98 changes: 98 additions & 0 deletions Sources/SwiftUIX/Intramodular/Pagination/PageControl.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,10 @@ public struct PageControl {
var defersCurrentPageDisplay: Bool?
@usableFromInline
var hidesForSinglePage: Bool?
@usableFromInline
var indicatorImages: [Int: UIImage]?
@usableFromInline
var currentPageIndicatorImages: [Int: UIImage]?

@inlinable
public init(numberOfPages: Int, currentPage: Binding<Int>) {
Expand Down Expand Up @@ -72,6 +76,24 @@ extension PageControl: UIViewRepresentable {
if let backgroundStyle = context.environment.pageControlBackgroundStyle {
uiView.backgroundStyle = backgroundStyle
}

if let indicators = indicatorImages {
for (page, image) in indicators {
uiView.setIndicatorImage(image, forPage: page)
}
}

uiView.preferredIndicatorImage = context.environment.preferredIndicatorImage
}

if #available(iOS 16.0, tvOS 16.0, *) {
if let currentPageIndicators = currentPageIndicatorImages {
for (page, image) in currentPageIndicators {
uiView.setCurrentPageIndicatorImage(image, forPage: page)
}
}

uiView.preferredCurrentPageIndicatorImage = context.environment.preferredCurrentPageIndicatorImage
}

if let hidesForSinglePage = hidesForSinglePage {
Expand Down Expand Up @@ -103,6 +125,36 @@ extension PageControl {
public func hidesForSinglePage(_ hidesForSinglePage: Bool) -> Self {
then({ $0.hidesForSinglePage = hidesForSinglePage })
}

@available(iOS 14.0, tvOS 14.0, *)
@inlinable
public func indicatorImage(forPage page: Int) -> UIImage? {
indicatorImages?[page]
}

@available(iOS 14.0, tvOS 14.0, *)
@inlinable
public func setIndicatorImage(_ image: UIImage?, forPage page: Int) -> Self {
then({
if $0.indicatorImages == nil { $0.indicatorImages = [:] }
$0.indicatorImages?[page] = image
})
}

@available(iOS 16.0, tvOS 16.0, *)
@inlinable
public func currentPageIndicatorImage(forPage page: Int) -> UIImage? {
currentPageIndicatorImages?[page]
}

@available(iOS 16.0, tvOS 16.0, *)
@inlinable
public func setCurrentPageIndicatorImage(_ image: UIImage?, forPage page: Int) -> Self {
then({
if $0.currentPageIndicatorImages == nil { $0.currentPageIndicatorImages = [:] }
$0.currentPageIndicatorImages?[page] = image
})
}
}

extension View {
Expand All @@ -121,6 +173,18 @@ extension View {
public func currentPageIndicatorTintColor(_ color: Color) -> some View {
environment(\.currentPageIndicatorTintColor, color)
}

@available(iOS 14.0, tvOS 14.0, *)
@inlinable
public func preferredIndicatorImage(_ image: UIImage) -> some View {
environment(\.preferredIndicatorImage, image)
}

@available(iOS 16.0, tvOS 16.0, *)
@inlinable
public func preferredCurrentPageIndicatorImage(_ image: UIImage) -> some View {
environment(\.preferredCurrentPageIndicatorImage, image)
}
}

// MARK: - Auxiliary
Expand All @@ -144,6 +208,20 @@ extension PageControl {
@usableFromInline
static let defaultValue: Color? = nil
}

@available(iOS 14.0, tvOS 14.0, *)
@usableFromInline
struct PreferredIndicatorImageEnvironmentKey: EnvironmentKey {
@usableFromInline
static let defaultValue: UIImage? = nil
}

@available(iOS 16.0, tvOS 16.0, *)
@usableFromInline
struct PreferredCurrentPageIndicatorImage: EnvironmentKey {
@usableFromInline
static let defaultValue: UIImage? = nil
}
}

extension EnvironmentValues {
Expand Down Expand Up @@ -174,6 +252,26 @@ extension EnvironmentValues {
self[PageControl.CurrentTintColorEnvironmentKey.self] = newValue
}
}

@available(iOS 14.0, tvOS 14.0, *)
@inlinable
public var preferredIndicatorImage: UIImage? {
get {
self[PageControl.PreferredIndicatorImageEnvironmentKey.self]
} set {
self[PageControl.PreferredIndicatorImageEnvironmentKey.self] = newValue
}
}

@available(iOS 16.0, tvOS 16.0, *)
@inlinable
public var preferredCurrentPageIndicatorImage: UIImage? {
get {
self[PageControl.PreferredCurrentPageIndicatorImage.self]
} set {
self[PageControl.PreferredCurrentPageIndicatorImage.self] = newValue
}
}
}

#endif