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Added auto update thumb color #2

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Added auto update thumb color #2

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35 changes: 35 additions & 0 deletions GradientSlider/GradientSlider.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ import UIKit
@IBInspectable var hasRainbow:Bool = false {didSet{updateTrackColors()}}//Uses saturation & lightness from minColor
@IBInspectable var minColor:UIColor = UIColor.blueColor() {didSet{updateTrackColors()}}
@IBInspectable var maxColor:UIColor = UIColor.orangeColor() {didSet{updateTrackColors()}}
@IBInspectable var autoThumbColor:Bool = true {didSet{updateThumbColor()}}

@IBInspectable var value: CGFloat {
get{return _value}
Expand Down Expand Up @@ -310,8 +311,10 @@ import UIKit
layerSize = min(max(icon.size.height,icon.size.width),layerSize)
_thumbIconLayer.cornerRadius = 0.0
_thumbIconLayer.backgroundColor = UIColor.clearColor().CGColor
autoThumbColor = false
}else{
_thumbIconLayer.cornerRadius = layerSize/2.0
autoThumbColor = true
}
_thumbIconLayer.position = CGPointMake(halfSize, halfSize)
_thumbIconLayer.bounds = CGRectMake(0, 0, layerSize, layerSize)
Expand Down Expand Up @@ -376,6 +379,14 @@ import UIKit
}else{
_thumbLayer.position = CGPointMake(left + (trackWidth * perc), halfHeight)
}
updateThumbColor()
}

private func updateThumbColor() {
if autoThumbColor {
let newColor = self.colorForValue(value)
self.thumbColor = newColor
}
}

private func valueForLocation(point:CGPoint)->CGFloat {
Expand Down Expand Up @@ -404,7 +415,31 @@ import UIKit
return (perc * diff) + CGFloat(self.minimumValue)
}

private func colorForValue(value:CGFloat)->UIColor {
if !hasRainbow {
var minRed : CGFloat = 0.0
var minGreen : CGFloat = 0.0
var minBlue : CGFloat = 0.0
var minAlpha : CGFloat = 0.0
minColor.getRed(&minRed, green: &minGreen, blue: &minBlue, alpha: &minAlpha)

var maxRed : CGFloat = 0.0
var maxGreen : CGFloat = 0.0
var maxBlue : CGFloat = 0.0
var maxAlpha : CGFloat = 0.0
maxColor.getRed(&maxRed, green: &maxGreen, blue: &maxBlue, alpha: &maxAlpha)

let red : CGFloat = (minRed + value * (maxRed - minRed))
let green : CGFloat = (minGreen + value * (maxGreen - minGreen))
let blue : CGFloat = (minBlue + value * (maxBlue - minBlue))
let alpha : CGFloat = (minAlpha + value * (maxAlpha - minAlpha))
return UIColor(red:red, green: green, blue:blue, alpha:alpha)
}
return UIColor(hue: value, saturation: 1.0, brightness: 1.0, alpha: 1.0)
}

private func updateTrackColors() {
updateThumbColor()
if !hasRainbow {
_trackLayer.colors = [minColor.CGColor,maxColor.CGColor]
_trackLayer.locations = [0.0,1.0]
Expand Down