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‎Knob+Touches.swift

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//
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// Knob+Touches.swift
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// Swift Synth
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//
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// Created by Matthew Fecher on 1/9/16.
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// Copyright © 2016 AudioKit. All rights reserved.
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//
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import UIKit
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extension Knob {
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override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
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for touch in touches {
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let touchPoint = touch.location(in: self)
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lastX = touchPoint.x
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lastY = touchPoint.y
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}
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}
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override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
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for touch in touches {
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let touchPoint = touch.location(in: self)
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setPercentagesWithTouchPoint(touchPoint)
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}
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}
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}

‎KnobStyleKit.swift

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//
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// KnobStyleKit.swift
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// UISpike
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//
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// Created by Matthew Fecher on 7/20/17.
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// Copyright © 2017 AudioKit. All rights reserved.
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//
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// Generated by PaintCode
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// http://www.paintcodeapp.com
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//
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// This code was generated by Trial version of PaintCode, therefore cannot be used for commercial purposes.
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//
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import Cocoa
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public class KnobStyleKit : NSObject {
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//// Drawing Methods
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@objc dynamic public class func drawKnobCanvas(frame targetFrame: NSRect = NSRect(x: 0, y: 0, width: 120, height: 120), resizing: ResizingBehavior = .aspectFit, knobValue: CGFloat = 1) {
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//// General Declarations
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let context = NSGraphicsContext.current()!.cgContext
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//// Resize to Target Frame
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NSGraphicsContext.saveGraphicsState()
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let resizedFrame: NSRect = resizing.apply(rect: NSRect(x: 0, y: 0, width: 120, height: 120), target: targetFrame)
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context.translateBy(x: resizedFrame.minX, y: resizedFrame.minY)
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context.scaleBy(x: resizedFrame.width / 120, y: resizedFrame.height / 120)
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let resizedShadowScale: CGFloat = min(resizedFrame.width / 120, resizedFrame.height / 120)
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//// Color Declarations
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let black = NSColor(red: 0, green: 0, blue: 0, alpha: 1)
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let shadowColor = NSColor(red: 1, green: 0.596, blue: 0, alpha: 1)
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let knobBottom = NSColor(red: 0.18, green: 0.18, blue: 0.192, alpha: 1)
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let knobLight = NSColor(red: 0.498, green: 0.498, blue: 0.51, alpha: 1)
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let knobTop2 = NSColor(red: 0.141, green: 0.141, blue: 0.161, alpha: 1)
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let orange2 = NSColor(red: 0.902, green: 0.533, blue: 0.008, alpha: 1)
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//// Gradient Declarations
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let edge2 = NSGradient(colors: [knobBottom, knobBottom.blended(withFraction: 0.5, of: knobTop2)!, knobTop2, knobTop2.blended(withFraction: 0.5, of: knobLight)!, knobLight], atLocations: [0.0, 0.23, 0.41, 0.73, 1.0], colorSpace: NSColorSpace.sRGB)!
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let lowerKnobGradient2 = NSGradient(colors: [knobTop2, knobBottom, knobLight], atLocations: [0.0, 0.51, 1.0], colorSpace: NSColorSpace.sRGB)!
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//// Shadow Declarations
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let shadow2 = NSShadow()
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shadow2.shadowColor = NSColor.black.withAlphaComponent(0.46)
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shadow2.shadowOffset = NSSize(width: 2, height: -8)
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shadow2.shadowBlurRadius = 5
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let shadow3 = NSShadow()
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shadow3.shadowColor = knobLight.withAlphaComponent(0.41 * knobLight.alphaComponent)
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shadow3.shadowOffset = NSSize(width: 0, height: -10)
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shadow3.shadowBlurRadius = 5
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let shadow4 = NSShadow()
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shadow4.shadowColor = shadowColor
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shadow4.shadowOffset = NSSize(width: 0, height: 0)
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shadow4.shadowBlurRadius = 12
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//// Variable Declarations
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let knobAngle: CGFloat = -240 * knobValue
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//// Knob
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//// BlackBackground Drawing
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let blackBackgroundPath = NSBezierPath(ovalIn: NSRect(x: 0, y: 0, width: 120, height: 120))
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black.setFill()
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blackBackgroundPath.fill()
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//// GradientKnob 2 Drawing
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let gradientKnob2Path = NSBezierPath(ovalIn: NSRect(x: 9, y: 9, width: 102, height: 102))
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lowerKnobGradient2.draw(in: gradientKnob2Path, angle: 90)
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//// GradientKnob Drawing
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let gradientKnobPath = NSBezierPath(ovalIn: NSRect(x: 15, y: 15, width: 90, height: 90))
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NSGraphicsContext.saveGraphicsState()
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context.setShadow(offset: NSSize(width: shadow2.shadowOffset.width * resizedShadowScale, height: shadow2.shadowOffset.height * resizedShadowScale), blur: shadow2.shadowBlurRadius * resizedShadowScale, color: shadow2.shadowColor!.cgColor)
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context.beginTransparencyLayer(auxiliaryInfo: nil)
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edge2.draw(in: gradientKnobPath, angle: 90)
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context.endTransparencyLayer()
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////// GradientKnob Inner Shadow
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NSGraphicsContext.saveGraphicsState()
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NSRectClip(gradientKnobPath.bounds)
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context.setShadow(offset: NSSize.zero, blur: 0, color: nil)
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context.setAlpha(shadow3.shadowColor!.alphaComponent)
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context.beginTransparencyLayer(auxiliaryInfo: nil)
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let gradientKnobOpaqueShadow = NSShadow()
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gradientKnobOpaqueShadow.shadowColor = shadow3.shadowColor!.withAlphaComponent(1)
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gradientKnobOpaqueShadow.shadowOffset = NSSize(width: shadow3.shadowOffset.width * resizedShadowScale, height: shadow3.shadowOffset.height * resizedShadowScale)
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gradientKnobOpaqueShadow.shadowBlurRadius = shadow3.shadowBlurRadius * resizedShadowScale
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gradientKnobOpaqueShadow.set()
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context.setBlendMode(.sourceOut)
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context.beginTransparencyLayer(auxiliaryInfo: nil)
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gradientKnobOpaqueShadow.shadowColor!.setFill()
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gradientKnobPath.fill()
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context.endTransparencyLayer()
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context.endTransparencyLayer()
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NSGraphicsContext.restoreGraphicsState()
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NSGraphicsContext.restoreGraphicsState()
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//// IndicatorGroup
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//// Indicator Drawing
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NSGraphicsContext.saveGraphicsState()
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context.translateBy(x: 60, y: 60)
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context.rotate(by: (knobAngle - 240) * CGFloat.pi/180)
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let indicatorPath = NSBezierPath(rect: NSRect(x: -3, y: 29, width: 6, height: 17))
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NSGraphicsContext.saveGraphicsState()
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context.setShadow(offset: NSSize(width: shadow4.shadowOffset.width * resizedShadowScale, height: shadow4.shadowOffset.height * resizedShadowScale), blur: shadow4.shadowBlurRadius * resizedShadowScale, color: shadow4.shadowColor!.cgColor)
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orange2.setFill()
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indicatorPath.fill()
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NSGraphicsContext.restoreGraphicsState()
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NSGraphicsContext.restoreGraphicsState()
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NSGraphicsContext.restoreGraphicsState()
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}
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@objc(KnobStyleKitResizingBehavior)
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public enum ResizingBehavior: Int {
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case aspectFit /// The content is proportionally resized to fit into the target rectangle.
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case aspectFill /// The content is proportionally resized to completely fill the target rectangle.
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case stretch /// The content is stretched to match the entire target rectangle.
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case center /// The content is centered in the target rectangle, but it is NOT resized.
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public func apply(rect: NSRect, target: NSRect) -> NSRect {
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if rect == target || target == NSRect.zero {
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return rect
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}
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var scales = NSSize.zero
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scales.width = abs(target.width / rect.width)
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scales.height = abs(target.height / rect.height)
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switch self {
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case .aspectFit:
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scales.width = min(scales.width, scales.height)
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scales.height = scales.width
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case .aspectFill:
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scales.width = max(scales.width, scales.height)
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scales.height = scales.width
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case .stretch:
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break
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case .center:
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scales.width = 1
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scales.height = 1
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}
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var result = rect.standardized
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result.size.width *= scales.width
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result.size.height *= scales.height
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result.origin.x = target.minX + (target.width - result.width) / 2
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result.origin.y = target.minY + (target.height - result.height) / 2
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return result
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}
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}
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}

‎KnobView.swift

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//
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// KnobView.swift
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// SynthUISpike
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//
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// Created by Matthew Fecher on 7/20/17.
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// Copyright © 2017 Matthew Fecher. All rights reserved.
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//
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import UIKit
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class KnobView: UIView {
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/*
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// Only override draw() if you perform custom drawing.
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// An empty implementation adversely affects performance during animation.
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override func draw(_ rect: CGRect) {
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// Drawing code
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}
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*/
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}

‎SynthUISpike/Assets.xcassets/AppIcon.appiconset/Contents.json

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{
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"images" : [
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{
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"idiom" : "iphone",
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"size" : "20x20",
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"scale" : "2x"
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},
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{
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"idiom" : "iphone",
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"size" : "20x20",
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"scale" : "3x"
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},
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{
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"idiom" : "iphone",
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"size" : "29x29",
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"size" : "60x60",
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"scale" : "3x"
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},
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{
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"idiom" : "ipad",
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"size" : "20x20",
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"scale" : "1x"
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},
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{
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"idiom" : "ipad",
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"size" : "20x20",
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"scale" : "2x"
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},
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{
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"idiom" : "ipad",
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"size" : "29x29",
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"idiom" : "ipad",
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"size" : "76x76",
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"scale" : "2x"
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},
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{
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"idiom" : "ipad",
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"size" : "83.5x83.5",
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"scale" : "2x"
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}
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],
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"info" : {

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