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PageControlNode: update colors

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This commit is contained in:
Peter 2019-04-26 19:08:12 +04:00
parent 304535df84
commit 05c5fec8cb
1 changed files with 33 additions and 15 deletions
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48
Display/PageControlNode.swift
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@ -4,16 +4,42 @@ import AsyncDisplayKit
public final class PageControlNode: ASDisplayNode { public final class PageControlNode: ASDisplayNode {
private let dotSize: CGFloat private let dotSize: CGFloat
private let dotSpacing: CGFloat private let dotSpacing: CGFloat
private let dotColor: UIColor public var dotColor: UIColor {
didSet {
if !oldValue.isEqual(self.dotColor) {
self.normalDotImage = generateFilledCircleImage(diameter: dotSize, color: self.dotColor)!
for dotNode in self.dotNodes {
if dotNode === oldValue {
dotNode.image = self.normalDotImage
}
}
}
}
}
public var inactiveDotColor: UIColor {
didSet {
if !oldValue.isEqual(self.inactiveDotColor) {
self.inactiveDotImage = generateFilledCircleImage(diameter: dotSize, color: self.inactiveDotColor)!
for dotNode in self.dotNodes {
if dotNode === oldValue {
dotNode.image = self.inactiveDotImage
}
}
}
}
}
private var dotNodes: [ASImageNode] = [] private var dotNodes: [ASImageNode] = []
private let normalDotImage: UIImage private var normalDotImage: UIImage
private var inactiveDotImage: UIImage
public init(dotSize: CGFloat = 7.0, dotSpacing: CGFloat = 9.0, dotColor: UIColor) { public init(dotSize: CGFloat = 7.0, dotSpacing: CGFloat = 9.0, dotColor: UIColor, inactiveDotColor: UIColor) {
self.dotSize = dotSize self.dotSize = dotSize
self.dotSpacing = dotSpacing self.dotSpacing = dotSpacing
self.dotColor = dotColor self.dotColor = dotColor
self.inactiveDotColor = inactiveDotColor
self.normalDotImage = generateFilledCircleImage(diameter: dotSize, color: dotColor)! self.normalDotImage = generateFilledCircleImage(diameter: dotSize, color: dotColor)!
self.inactiveDotImage = generateFilledCircleImage(diameter: dotSize, color: inactiveDotColor)!
super.init() super.init()
} }
@ -39,22 +65,14 @@ public final class PageControlNode: ASDisplayNode {
} }
public func setPage(_ pageValue: CGFloat) { public func setPage(_ pageValue: CGFloat) {
let page = max(0.0, min(CGFloat(self.pagesCount - 1), pageValue)) let page = Int(round(pageValue))
for i in 0 ..< self.dotNodes.count { for i in 0 ..< self.dotNodes.count {
var alpha: CGFloat = 0.0 if i != page {
let delta = abs(CGFloat(i) - page) self.dotNodes[i].image = self.inactiveDotImage
if delta >= 1.0 {
alpha = 0.5
} else { } else {
alpha = 1.0 - delta self.dotNodes[i].image = self.normalDotImage
alpha *= alpha * alpha
} }
if alpha < 0.5 {
alpha = 0.5
}
self.dotNodes[i].alpha = alpha
} }
} }