122 lines
4.1 KiB
Swift
122 lines
4.1 KiB
Swift
//
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// WhatsAppCircular.swift
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// ProgressKit
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//
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// Created by Kauntey Suryawanshi on 30/06/15.
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// Copyright (c) 2015 Kauntey Suryawanshi. All rights reserved.
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//
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import Foundation
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import Cocoa
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private let duration = 1.5
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private let strokeRange = (start: 0.0, end: 0.8)
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@IBDesignable
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public class CircularSnail: IndeterminateAnimation {
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@IBInspectable var lineWidth: CGFloat = -1 {
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didSet {
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progressLayer.lineWidth = lineWidth
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}
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}
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override func notifyViewRedesigned() {
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super.notifyViewRedesigned()
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progressLayer.strokeColor = foreground.CGColor
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}
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var backgroundRotationLayer = CAShapeLayer()
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var progressLayer: CAShapeLayer = {
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var tempLayer = CAShapeLayer()
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tempLayer.strokeEnd = CGFloat(strokeRange.end)
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tempLayer.lineCap = kCALineCapRound
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tempLayer.fillColor = NSColor.clearColor().CGColor
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return tempLayer
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}()
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//MARK: Animation Declaration
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var animationGroup: CAAnimationGroup = {
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var tempGroup = CAAnimationGroup()
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tempGroup.repeatCount = 1
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tempGroup.duration = duration
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return tempGroup
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}()
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var rotationAnimation: CABasicAnimation = {
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var tempRotation = CABasicAnimation(keyPath: "transform.rotation")
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tempRotation.repeatCount = Float.infinity
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tempRotation.fromValue = 0
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tempRotation.toValue = 1
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tempRotation.cumulative = true
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tempRotation.duration = duration / 2
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return tempRotation
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}()
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/// Makes animation for Stroke Start and Stroke End
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func makeStrokeAnimationGroup() {
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var strokeStartAnimation: CABasicAnimation!
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var strokeEndAnimation: CABasicAnimation!
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func makeAnimationforKeyPath(keyPath: String) -> CABasicAnimation {
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let tempAnimation = CABasicAnimation(keyPath: keyPath)
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tempAnimation.repeatCount = 1
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tempAnimation.speed = 2.0
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tempAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
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tempAnimation.fromValue = strokeRange.start
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tempAnimation.toValue = strokeRange.end
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tempAnimation.duration = duration
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return tempAnimation
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}
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strokeEndAnimation = makeAnimationforKeyPath("strokeEnd")
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strokeStartAnimation = makeAnimationforKeyPath("strokeStart")
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strokeStartAnimation.beginTime = duration / 2
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animationGroup.animations = [strokeEndAnimation, strokeStartAnimation, ]
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animationGroup.delegate = self
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}
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override func configureLayers() {
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super.configureLayers()
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makeStrokeAnimationGroup()
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let rect = self.bounds
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backgroundRotationLayer.frame = rect
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self.layer?.addSublayer(backgroundRotationLayer)
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// Progress Layer
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let radius = (rect.width / 2) * 0.75
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progressLayer.frame = rect
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progressLayer.lineWidth = lineWidth == -1 ? radius / 10: lineWidth
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let arcPath = NSBezierPath()
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arcPath.appendBezierPathWithArcWithCenter(rect.mid, radius: radius, startAngle: 0, endAngle: 360, clockwise: false)
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progressLayer.path = arcPath.CGPath
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backgroundRotationLayer.addSublayer(progressLayer)
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}
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var currentRotation = 0.0
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let π2 = M_PI * 2
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override public func animationDidStop(anim: CAAnimation, finished flag: Bool) {
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if !animate { return }
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CATransaction.begin()
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CATransaction.setDisableActions(true)
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currentRotation += strokeRange.end * π2
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currentRotation %= π2
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progressLayer.setAffineTransform(CGAffineTransformMakeRotation(CGFloat( currentRotation)))
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CATransaction.commit()
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progressLayer.addAnimation(animationGroup, forKey: "strokeEnd")
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}
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override func startAnimation() {
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progressLayer.addAnimation(animationGroup, forKey: "strokeEnd")
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backgroundRotationLayer.addAnimation(rotationAnimation, forKey: rotationAnimation.keyPath)
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}
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override func stopAnimation() {
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backgroundRotationLayer.removeAllAnimations()
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progressLayer.removeAllAnimations()
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}
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}
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