Charts/ChartsDemo-iOS/Swift/Demos/RadarChartViewController.swift

//
//  RadarChartViewController.swift
//  ChartsDemo-iOS
//
//  Created by Jacob Christie on 2017-07-09.
//  Copyright © 2017 jc. All rights reserved.
//

#if canImport(UIKit)
    import UIKit
#endif
import DGCharts

class RadarChartViewController: DemoBaseViewController {

    @IBOutlet var chartView: RadarChartView!
    
    let activities = ["Burger", "Steak", "Salad", "Pasta", "Pizza"]
    
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        self.title = "Radar Chart"
        self.options = [.toggleValues,
                        .toggleHighlight,
                        .toggleHighlightCircle,
                        .toggleXLabels,
                        .toggleYLabels,
                        .toggleRotate,
                        .toggleFilled,
                        .animateX,
                        .animateY,
                        .animateXY,
                        .spin,
                        .saveToGallery,
                        .toggleData]
        
        chartView.delegate = self
        
        chartView.chartDescription.enabled = false
        chartView.webLineWidth = 1
        chartView.innerWebLineWidth = 1
        chartView.webColor = .lightGray
        chartView.innerWebColor = .lightGray
        chartView.webAlpha = 1
        
        let marker = RadarMarkerView.viewFromXib()!
        marker.chartView = chartView
        chartView.marker = marker
        
        let xAxis = chartView.xAxis
        xAxis.labelFont = .systemFont(ofSize: 9, weight: .light)
        xAxis.xOffset = 0
        xAxis.yOffset = 0
        xAxis.valueFormatter = self
        xAxis.labelTextColor = .white
        
        let yAxis = chartView.yAxis
        yAxis.labelFont = .systemFont(ofSize: 9, weight: .light)
        yAxis.labelCount = 5
        yAxis.axisMinimum = 0
        yAxis.axisMaximum = 80
        yAxis.drawLabelsEnabled = false
        
        let l = chartView.legend
        l.horizontalAlignment = .center
        l.verticalAlignment = .top
        l.orientation = .horizontal
        l.drawInside = false
        l.font = .systemFont(ofSize: 10, weight: .light)
        l.xEntrySpace = 7
        l.yEntrySpace = 5
        l.textColor = .white
//        chartView.legend = l

        self.updateChartData()
        
        chartView.animate(xAxisDuration: 1.4, yAxisDuration: 1.4, easingOption: .easeOutBack)
    }

    override func updateChartData() {
        if self.shouldHideData {
            chartView.data = nil
            return
        }
        
        self.setChartData()
    }
    
    func setChartData() {
        let mult: UInt32 = 80
        let min: UInt32 = 20
        let cnt = 5
        
        let block: (Int) -> RadarChartDataEntry = { _ in return RadarChartDataEntry(value: Double(arc4random_uniform(mult) + min))}
        let entries1 = (0..<cnt).map(block)
        let entries2 = (0..<cnt).map(block)
        
        let set1 = RadarChartDataSet(entries: entries1, label: "Last Week")
        set1.setColor(UIColor(red: 103/255, green: 110/255, blue: 129/255, alpha: 1))
        set1.fillColor = UIColor(red: 103/255, green: 110/255, blue: 129/255, alpha: 1)
        set1.drawFilledEnabled = true
        set1.fillAlpha = 0.7
        set1.lineWidth = 2
        set1.drawHighlightCircleEnabled = true
        set1.setDrawHighlightIndicators(false)
        
        let set2 = RadarChartDataSet(entries: entries2, label: "This Week")
        set2.setColor(UIColor(red: 121/255, green: 162/255, blue: 175/255, alpha: 1))
        set2.fillColor = UIColor(red: 121/255, green: 162/255, blue: 175/255, alpha: 1)
        set2.drawFilledEnabled = true
        set2.fillAlpha = 0.7
        set2.lineWidth = 2
        set2.drawHighlightCircleEnabled = true
        set2.setDrawHighlightIndicators(false)
        
        let data: RadarChartData = [set1, set2]
        data.setValueFont(.systemFont(ofSize: 8, weight: .light))
        data.setDrawValues(false)
        data.setValueTextColor(.white)
        
        chartView.data = data
    }
    
    override func optionTapped(_ option: Option) {
        guard let data = chartView.data else { return }

        switch option {
        case .toggleXLabels:
            chartView.xAxis.drawLabelsEnabled = !chartView.xAxis.drawLabelsEnabled
            chartView.data?.notifyDataChanged()
            chartView.notifyDataSetChanged()
            chartView.setNeedsDisplay()
            
        case .toggleYLabels:
            chartView.yAxis.drawLabelsEnabled = !chartView.yAxis.drawLabelsEnabled
            chartView.setNeedsDisplay()

        case .toggleRotate:
            chartView.rotationEnabled = !chartView.rotationEnabled
            
        case .toggleFilled:
            for case let set as RadarChartDataSet in data {
                set.drawFilledEnabled = !set.drawFilledEnabled
            }
            
            chartView.setNeedsDisplay()
            
        case .toggleHighlightCircle:
            for case let set as RadarChartDataSet in data {
                set.drawHighlightCircleEnabled = !set.drawHighlightCircleEnabled
            }
            chartView.setNeedsDisplay()

        case .animateX:
            chartView.animate(xAxisDuration: 1.4)
            
        case .animateY:
            chartView.animate(yAxisDuration: 1.4)
            
        case .animateXY:
            chartView.animate(xAxisDuration: 1.4, yAxisDuration: 1.4)
            
        case .spin:
            chartView.spin(duration: 2, fromAngle: chartView.rotationAngle, toAngle: chartView.rotationAngle + 360, easingOption: .easeInCubic)
            
        default:
            super.handleOption(option, forChartView: chartView)
        }
    }
}

extension RadarChartViewController: AxisValueFormatter {
    func stringForValue(_ value: Double, axis: AxisBase?) -> String {
        return activities[Int(value) % activities.count]
    }
}