Hour Area

using System;
using cAlgo.API;
using cAlgo.API.Internals;
using cAlgo.API.Indicators;
using cAlgo.Indicators;

namespace cAlgo
{
    [Indicator(IsOverlay = true, TimeZone = TimeZones.CentralEuropeStandardTime, AccessRights = AccessRights.None)]
    public class HourArea : Indicator
    {
        [Parameter("Start Hour", DefaultValue = 9)]
        public int hour1 { get; set; }
        [Parameter("Start Minute", DefaultValue = 0)]
        public int min1 { get; set; }
        [Parameter("End Hour", DefaultValue = 18)]
        public int hour2 { get; set; }
        [Parameter("End Minute", DefaultValue = 0)]
        public int min2 { get; set; }

        [Parameter("Color", DefaultValue = "Gray")]
        public string col { get; set; }
        [Parameter("Transparency %", DefaultValue = 25)]
        public int trsp { get; set; }

        private bool draw = false;
        private int thc;

        protected override void Initialize()
        {
            trsp = trsp > 100 ? 100 : trsp < 0 ? 0 : trsp;
            hour1 = hour1 > 23 ? 23 : hour1 < 0 ? 0 : hour1;
            hour2 = hour2 > 23 ? 23 : hour2 < 0 ? 0 : hour2;
            min1 = min1 > 59 ? 59 : min1 < 0 ? 0 : min1;
            min2 = min2 > 59 ? 59 : min2 < 0 ? 0 : min2;
            Thickness();
            Chart.ZoomChanged += OnChartZoomChanged;
        }

        void OnChartZoomChanged(ChartZoomEventArgs obj)
        {
            Thickness();
            for (int i = 0; i < Chart.BarsTotal; i++)
            {
                Chart.RemoveObject("_hour" + i);
                Calculate(i);
            }
        }

        public override void Calculate(int index)
        {
            DateTime dt = MarketSeries.OpenTime[index];
            if (dt.Hour == hour1 && dt.Minute == min1)
                draw = true;
            if (dt.Hour == hour2 && dt.Minute == min2)
                draw = false;
            Color color = Color.FromName(col);
            Color alphaColor = Color.FromArgb((int)(trsp * 2.55), color.R, color.G, color.B);
            if (draw)
                Chart.DrawVerticalLine("_hour" + index, index, alphaColor, thc);
        }

        private void Thickness()
        {
            if (Chart.Zoom == 0)
            {
                thc = 1;
            }
            if (Chart.Zoom == 1)
            {
                thc = 2;
            }
            if (Chart.Zoom == 2)
            {
                thc = 4;
            }
            if (Chart.Zoom == 3)
            {
                thc = 8;
            }
            if (Chart.Zoom == 4)
            {
                thc = 16;
            }
            if (Chart.Zoom == 5)
            {
                thc = 32;
            }
            return;
        }
    }
}