116 lines
4.0 KiB
Swift
116 lines
4.0 KiB
Swift
//
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// HistoryGraphViewController.swift
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// pocloud
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//
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// Created by Patrick McDonagh on 5/29/18.
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// Copyright © 2018 patrickjmcd. All rights reserved.
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//
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import UIKit
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import SwiftChart
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class HistoryGraphViewController: UIViewController, ChartDelegate{
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@IBOutlet weak var leftConstraint: NSLayoutConstraint!
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@IBOutlet weak var lineChart: Chart!
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@IBOutlet weak var label: UILabel!
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var thisChannel : Channel?
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var channelHistory : [ChannelHistoryValue] = [ChannelHistoryValue]()
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var user : User?
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var dateFormatter = DateFormatter()
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let channelDataTypes: [Int : String] = [
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0: "Unknown",
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1: "Float",
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2: "String",
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3: "Integer",
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4: "Boolean",
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5: "DateTime",
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6: "Timespan",
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7 :"File",
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8: "LatLng"
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]
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override func viewDidLoad() {
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super.viewDidLoad()
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dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
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lineChart.delegate = self
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loadChartData()
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}
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func loadChartData() {
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switch channelDataTypes[(thisChannel?.dataType)!] {
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case "Float", "Integer":
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print("Float or Integer")
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let seriesData : [(x: Int, y: Double)] = channelHistory.map { (chHist) -> (x: Int, y: Double) in
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(x: Int(chHist.timestamp!.timeIntervalSince1970), y:Double(chHist.value)!)
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}
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lineChart.add(ChartSeries(data: seriesData))
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setupLineChart()
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default:
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let alert = UIAlertController(title: "Invalid Type", message: "This channel is of type \(channelDataTypes[(thisChannel?.channelType)!] ?? "ERROR") and cannot be graphed yet.", preferredStyle: .alert)
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let ok = UIAlertAction(title: "OK", style: .cancel, handler: { _ in
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self.navigationController?.popViewController(animated: true)
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})
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alert.addAction(ok)
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present(alert, animated: true)
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}
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}
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func setupLineChart() {
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let xLabelMax = lineChart.series.first?.data.first?.x
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let xLabelMin = lineChart.series.first?.data.last?.x
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let xLabelDoubles = [0.0, 0.25, 0.5, 0.75, 1.0].map { (multiplier) -> Double in
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xLabelMin! + (xLabelMax! - xLabelMin!) * multiplier
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}
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lineChart.xLabels = xLabelDoubles
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self.dateFormatter.dateFormat = "HH:mm:ss"
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lineChart.xLabelsFormatter = { (i, d) -> String in
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self.dateFormatter.string(from: Date(timeIntervalSince1970: d))
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}
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lineChart.bottomInset = 40
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lineChart.series.first?.area = true
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}
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func didTouchChart(_ chart: Chart, indexes: Array<Int?>, x: Double, left: CGFloat) {
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for (seriesIndex, dataIndex) in indexes.enumerated() {
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if dataIndex != nil {
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let value = chart.valueForSeries(seriesIndex, atIndex: dataIndex)
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let valueFormat = self.channelDataTypes[(self.thisChannel?.dataType)!]! == "Integer" ? "%d" : "%.3f"
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let valueString = String(format: valueFormat, value!)
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self.dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
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let timestamp = self.dateFormatter.string(from: channelHistory[dataIndex!].timestamp!)
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self.label.text = "\(valueString) @ \(timestamp)"
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let intendedLeftPosition = left - (0.5 * self.label.frame.width)
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if intendedLeftPosition < 8 {
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self.leftConstraint.constant = 8
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} else if (intendedLeftPosition + self.label.frame.width) > (self.view.frame.width - 8) {
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self.leftConstraint.constant = self.view.frame.width - (8 + self.label.frame.width)
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} else {
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self.leftConstraint.constant = intendedLeftPosition
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}
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}
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}
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}
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func didFinishTouchingChart(_ chart: Chart) {
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label.text = ""
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}
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func didEndTouchingChart(_ chart: Chart) {
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}
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}
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