Divergence Lite

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

namespace cAlgo.Indicators
{
    [Indicator(TimeZone = TimeZones.UTC, IsOverlay = true)]
    public class DivergenceLiteStart : Indicator
    {
        // Please download this indicator from 
        //
        // https://gum.co/divergencelite

        private string title = "Adaptive Price Channel";
        private string url = "https://gum.co/divergencelite";


        protected override void Initialize()
        {
            string buttonText = "Download " + title;
            Color backgroundColor = Application.ColorTheme == ColorTheme.Dark ? GetColorWithOpacity(Color.FromHex("#292929"), 0.85m) : GetColorWithOpacity(Color.FromHex("#FFFFFF"), 0.85m);

            var background = new Rectangle 
            {
                Height = Chart.Height,
                Width = Chart.Width,
                FillColor = backgroundColor
            };

            var button = new Button 
            {
                Text = buttonText,
                Padding = "16",
                Style = ButtonStyle(Color.FromHex("#009345"), Color.FromHex("#10A651"))
            };
            button.Click += e => System.Diagnostics.Process.Start(url);
            var container = new StackPanel 
            {
                HorizontalAlignment = HorizontalAlignment.Center,
                VerticalAlignment = VerticalAlignment.Center
            };
            container.AddChild(button);

            Chart.AddControl(background);
            Chart.AddControl(container);

            Print(title);
            Print(url);
        }

        public override void Calculate(int index)
        {

        }

        private Style ButtonStyle(Color color, Color hoverColor)
        {
            var style = new Style(DefaultStyles.ButtonStyle);
            style.Set(ControlProperty.BackgroundColor, color, ControlState.DarkTheme);
            style.Set(ControlProperty.BackgroundColor, color, ControlState.LightTheme);
            style.Set(ControlProperty.BackgroundColor, hoverColor, ControlState.DarkTheme | ControlState.Hover);
            style.Set(ControlProperty.BackgroundColor, hoverColor, ControlState.LightTheme | ControlState.Hover);
            style.Set(ControlProperty.ForegroundColor, Color.FromHex("#FFFFFF"), ControlState.DarkTheme);
            style.Set(ControlProperty.ForegroundColor, Color.FromHex("#FFFFFF"), ControlState.LightTheme);
            return style;
        }

        private Color GetColorWithOpacity(Color baseColor, decimal opacity)
        {
            var alpha = (int)Math.Round(byte.MaxValue * opacity, MidpointRounding.AwayFromZero);
            return Color.FromArgb(alpha, baseColor);
        }
    }
}