Interactive playground demo

VolumeSliderPlayground.swift

//: Playground - noun: a place where people can play

import Cocoa
import PlaygroundSupport

@testable import MyFramework
//Temp.test()

@testable import Utils
@testable import Element

ArrayParser.difference([1,2,3,4], [1])

class View: NSView {
    
    override var isFlipped:Bool {return true}/*Organizes your view from top to bottom*/
    override init(frame frameRect: NSRect) {
        super.init(frame: frameRect)//<--maybe: MTLSystemCreateDefaultDevice()
        
        self.wantsLayer = true/*if true then view is layer backed*/
        layer = CALayer()/*needs to be layer-hosted so that we dont get clipping of children*/
        let progress:CGFloat = 0.8
        
        let bgColor = NSColor.purple.blended(withFraction: progress,of: NSColor.cyan)!
        layer?.backgroundColor = bgColor.cgColor
        layer!.masksToBounds = false
        
        let w = frame.size.width
        let h = frame.size.height
        let sliderW:CGFloat = 100
        let sliderH:CGFloat = 20
        
        StyleManager.addStylesByURL("~/Desktop/ElCapitan/explorer.css")
        StyleManager.addStyle("Container{margin-left:\((w/2)-(sliderW/2))px;margin-top:\((h/2)-(sliderH/2))px;}")
        
        let container = addSubView(Container(frame.size.width,frame.size.height))
        let volumeSlider = container.addSubView(VolumeSlider(sliderW,sliderH,20,0,container))
        volumeSlider.setProgressValue(progress)
        func onVolumeSliderChange(event: Event) {
            if(event.assert(SliderEvent.change, volumeSlider)){
                let volumSliderProgress = (event as! SliderEvent).progress
                let newColor = NSColor.purple.blended(withFraction: volumSliderProgress,of: NSColor.cyan)!
                CATransaction.begin()
                CATransaction.setValue(kCFBooleanTrue, forKey: kCATransactionDisableActions)
                layer?.backgroundColor = newColor.cgColor
                CATransaction.commit()
                Swift.print("volumSliderProgress: " + "\(volumSliderProgress)")
            }
        }
        volumeSlider.event = onVolumeSliderChange
    }
    required init(coder: NSCoder) {fatalError("init(coder:) has not been implemented") }
}

let view: View = View(frame:NSRect(x: 0, y: 0, width: 200, height: 200))




PlaygroundPage.current.liveView = view
//PlaygroundPage.current.needsIndefiniteExecution = true