ninjatrader/indicators/news/News.cs

#region Using declarations
using NinjaTrader.Gui;
using NinjaTrader.Gui.Chart;
using NinjaTrader.Gui.Tools;
using SharpDX;
using SharpDX.DirectWrite;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Net.Http;
using System.Text.RegularExpressions;
using System.Windows.Media;
using System.Xml.Serialization;
#endregion

namespace NinjaTrader.NinjaScript.Indicators
{
    public class NewsEvent
    {
        public string Time { get; set; }
        public string Currency { get; set; }
        public string Title { get; set; }
    }

    public class News : Indicator
    {
        private List<NewsEvent> newsEvents = new List<NewsEvent>();
        private DateTime currentDate = DateTime.Now.Date;

        protected override void OnStateChange()
        {
            if (State == State.SetDefaults)
            {
                Description = @"Displays economic news events for the current day on the chart";
                Name = "News";
                Calculate = Calculate.OnBarClose;
                IsOverlay = true;
                ScaleJustification = ScaleJustification.Right;
                IsSuspendedWhileInactive = true;

                HeaderColor = Brushes.Yellow;
                HeaderTextColor = Brushes.Black;
                EventTextColor = Brushes.White;
                HeaderFont = new SimpleFont("Arial", 12);
                EventFont = new SimpleFont("Arial", 12);
                HorizontalPadding = 20;
                VerticalPadding = 5;
                YOffset = 0;
                CellBackgroundColor = Brushes.Transparent;
                CurrencyFilter = "USD";
            }
            else if (State == State.Configure)
            {
                RequestNewsEvents();
            }
            else if (State == State.Historical)
            {
                SetZOrder(-1); // Display behind bars on chart.
            }
        }

        private async void RequestNewsEvents()
        {
            try
            {
                newsEvents.Clear();

                HttpClient client = new HttpClient();
                client.DefaultRequestHeaders.UserAgent.ParseAdd("Mozilla/5.0 (Windows NT 10.0; Win64; x64)");

                string newsUrl = "https://nfs.faireconomy.media/ff_calendar_thisweek.json";
                HttpResponseMessage response = await client.GetAsync(newsUrl);
                response.EnsureSuccessStatusCode();

                string responseBody = await response.Content.ReadAsStringAsync();
                ParseNewsEvents(responseBody);

                ForceRefresh();
            }
            catch (Exception e)
            {
                Print("Error loading news events: " + e.Message);
            }
        }

        private void ParseNewsEvents(string json)
        {
            try
            {
                var events = Regex.Matches(json, @"\{[^}]*\}");

                foreach (Match eventMatch in events)
                {
                    string eventString = eventMatch.Value;

                    string date = ExtractJsonValue(eventString, "date");
                    string currency = ExtractJsonValue(eventString, "country");
                    string title = ExtractJsonValue(eventString, "title");

                    DateTime eventTime = DateTime.Parse(date);
                    if (eventTime.Date != currentDate)
                        continue;

                    string time = eventTime.ToString("hh:mmtt").ToLower();

                    if (!string.IsNullOrEmpty(CurrencyFilter) && !currency.Equals(CurrencyFilter, StringComparison.OrdinalIgnoreCase))
                        continue; // Skip events that do not match the filter.

                    newsEvents.Add(new NewsEvent { Time = time, Currency = currency, Title = title });
                }
            }
            catch (Exception ex)
            {
                Print("Error parsing news events: " + ex.Message);
            }
        }

        private string ExtractJsonValue(string json, string key)
        {
            string pattern = $"\"{key}\":\"(.*?)\"";
            Match match = Regex.Match(json, pattern);
            return match.Success ? match.Groups[1].Value : string.Empty;
        }

        protected override void OnBarUpdate() {
            if (State == State.Realtime)
            {
                if (DateTime.Now.Date != currentDate)
                {
                    RequestNewsEvents();
                    currentDate = DateTime.Now.Date;
                }
            }
        }

        protected override void OnRender(ChartControl chartControl, ChartScale chartScale)
        {
            base.OnRender(chartControl, chartScale);

            int maxColWidth = 0;
            int maxHeaderHeight = 0;
            int maxRowHeight = 0;

            // Determine maximum column width and row height.
            using (TextFormat headerTextFormat = HeaderFont.ToDirectWriteTextFormat(),
                eventTextFormat = EventFont.ToDirectWriteTextFormat())
            {
                var headerSize = MeasureString("Time", headerTextFormat);
                maxColWidth = Math.Max(maxColWidth, headerSize.Width);
                maxHeaderHeight = Math.Max(maxHeaderHeight, headerSize.Height);

                headerSize = MeasureString("Currency", headerTextFormat);
                maxColWidth = Math.Max(maxColWidth, headerSize.Width);

                headerSize = MeasureString("Event", headerTextFormat);
                maxColWidth = Math.Max(maxColWidth, headerSize.Width);

                foreach (var newsEvent in new List<NewsEvent>(newsEvents)) // New list in order to avoid concurrent modification
                {
                    var timeSize = MeasureString(newsEvent.Time, eventTextFormat);
                    var currencySize = MeasureString(newsEvent.Currency, eventTextFormat);
                    var titleSize = MeasureString(newsEvent.Title, eventTextFormat);
                    maxColWidth = Math.Max(maxColWidth, Math.Max(timeSize.Width, Math.Max(currencySize.Width, titleSize.Width)));
                    maxRowHeight = Math.Max(maxRowHeight, Math.Max(timeSize.Height, Math.Max(currencySize.Height, titleSize.Height)));
                }
            }

            maxColWidth += HorizontalPadding * 2;
            int headerHeight = maxHeaderHeight + (VerticalPadding * 2);
            int rowHeight = maxRowHeight + (VerticalPadding * 2);

            int x = ChartPanel.W - (maxColWidth * 3) - HorizontalPadding;
            int y = YOffset;

            // Draw header row.
            using (TextFormat headerTextFormat = HeaderFont.ToDirectWriteTextFormat())
            {
                string[] headers = { "Time", "Currency", "Event" };
                foreach (var header in headers)
                {
                    RectangleF headerRect = new RectangleF(x, y, maxColWidth, headerHeight);
                    RenderTarget.FillRectangle(headerRect, HeaderColor.ToDxBrush(RenderTarget));

                    var size = MeasureString(header, headerTextFormat);
                    int textX = x + (maxColWidth - size.Width) / 2; // Center the text horizontally.
                    int textY = y + (headerHeight - size.Height) / 2; // Center the text vertically.

                    DrawText(header, textX, textY, HeaderTextColor, headerTextFormat, headerHeight);
                    x += maxColWidth;
                }
            }

            // Reset x coordinate for news events.
            x = ChartPanel.W - (maxColWidth * 3) - HorizontalPadding;
            y += headerHeight;

            // Draw news events.
            using (TextFormat eventTextFormat = EventFont.ToDirectWriteTextFormat())
            {
                foreach (var newsEvent in new List<NewsEvent>(newsEvents))
                {
                    var timeSize = MeasureString(newsEvent.Time, eventTextFormat);
                    var currencySize = MeasureString(newsEvent.Currency, eventTextFormat);
                    var titleSize = MeasureString(newsEvent.Title, eventTextFormat);

                    // Draw cell backgrounds
                    RectangleF timeRect = new RectangleF(x, y, maxColWidth, rowHeight);
                    RenderTarget.FillRectangle(timeRect, CellBackgroundColor.ToDxBrush(RenderTarget));

                    RectangleF currencyRect = new RectangleF(x + maxColWidth, y, maxColWidth, rowHeight);
                    RenderTarget.FillRectangle(currencyRect, CellBackgroundColor.ToDxBrush(RenderTarget));

                    RectangleF titleRect = new RectangleF(x + (2 * maxColWidth), y, maxColWidth, rowHeight);
                    RenderTarget.FillRectangle(titleRect, CellBackgroundColor.ToDxBrush(RenderTarget));

                    // Draw text
                    DrawText(newsEvent.Time, x + (maxColWidth - timeSize.Width) / 2, y + (rowHeight - timeSize.Height) / 2, EventTextColor, eventTextFormat, rowHeight);
                    DrawText(newsEvent.Currency, x + maxColWidth + (maxColWidth - currencySize.Width) / 2, y + (rowHeight - currencySize.Height) / 2, EventTextColor, eventTextFormat, rowHeight);
                    DrawText(newsEvent.Title, x + (2 * maxColWidth) + (maxColWidth - titleSize.Width) / 2, y + (rowHeight - titleSize.Height) / 2, EventTextColor, eventTextFormat, rowHeight);

                    y += rowHeight;
                }
            }
        }

        private Size2 MeasureString(string text, TextFormat textFormat)
        {
            using (var textLayout = new TextLayout(Core.Globals.DirectWriteFactory, text, textFormat, float.PositiveInfinity, float.PositiveInfinity))
            {
                return new Size2((int)Math.Ceiling(textLayout.Metrics.Width), (int)Math.Ceiling(textLayout.Metrics.Height));
            }
        }

        private void DrawText(string text, int x, int y, Brush brush, TextFormat textFormat, int height)
        {
            TextLayout textLayout = new TextLayout(Core.Globals.DirectWriteFactory, text, textFormat, 500, height);
            Vector2 textOrigin = new Vector2(x, y);
            RenderTarget.DrawTextLayout(textOrigin, textLayout, brush.ToDxBrush(RenderTarget));
            textLayout.Dispose();
        }

        public override string DisplayName
        {
            get { return Name; }
        }

        #region Properties
        [XmlIgnore]
        [Display(Name = "Header Row", GroupName = "News", Order = 1)]
        public Brush HeaderColor { get; set; }

        [Browsable(false)]
        public string HeaderColorSerialization
        {
            get { return Serialize.BrushToString(HeaderColor); }
            set { HeaderColor = Serialize.StringToBrush(value); }
        }

        [XmlIgnore]
        [Display(Name = "Header Text", GroupName = "News", Order = 2)]
        public Brush HeaderTextColor { get; set; }

        [Browsable(false)]
        public string HeaderTextColorSerialization
        {
            get { return Serialize.BrushToString(HeaderTextColor); }
            set { HeaderTextColor = Serialize.StringToBrush(value); }
        }

        [XmlIgnore]
        [Display(Name = "Event Text", GroupName = "News", Order = 3)]
        public Brush EventTextColor { get; set; }

        [Browsable(false)]
        public string EventTextColorSerialization
        {
            get { return Serialize.BrushToString(EventTextColor); }
            set { EventTextColor = Serialize.StringToBrush(value); }
        }

        [Range(0, int.MaxValue)]
        [Display(Name = "Horizontal Padding", GroupName = "News", Order = 4)]
        public int HorizontalPadding { get; set; }

        [Range(0, int.MaxValue)]
        [Display(Name = "Vertical Padding", GroupName = "News", Order = 5)]
        public int VerticalPadding { get; set; }

        [Range(0, int.MaxValue)]
        [Display(Name = "Y-Offset", GroupName = "News", Order = 6)]
        public int YOffset { get; set; }

        [Display(Name = "Header Font", GroupName = "News", Order = 7)]
        public SimpleFont HeaderFont { get; set; }

        [Display(Name = "Event Font", GroupName = "News", Order = 8)]
        public SimpleFont EventFont { get; set; }

        [XmlIgnore]
        [Display(Name = "Cell Background", GroupName = "News", Order = 9)]
        public Brush CellBackgroundColor { get; set; }

        [Browsable(false)]
        public string CellBackgroundColorSerialization
        {
            get { return Serialize.BrushToString(CellBackgroundColor); }
            set { CellBackgroundColor = Serialize.StringToBrush(value); }
        }

        [Display(Name = "Currency Filter", GroupName = "News", Order = 10)]
        public string CurrencyFilter { get; set; }

        #endregion
    }
}

#region NinjaScript generated code. Neither change nor remove.

namespace NinjaTrader.NinjaScript.Indicators
{
    public partial class Indicator : NinjaTrader.Gui.NinjaScript.IndicatorRenderBase
    {
        private News[] cacheNews;
        public News News()
        {
            return News(Input);
        }

        public News News(ISeries<double> input)
        {
            if (cacheNews != null)
                for (int idx = 0; idx < cacheNews.Length; idx++)
                    if (cacheNews[idx] != null &&  cacheNews[idx].EqualsInput(input))
                        return cacheNews[idx];
            return CacheIndicator<News>(new News(), input, ref cacheNews);
        }
    }
}

namespace NinjaTrader.NinjaScript.MarketAnalyzerColumns
{
    public partial class MarketAnalyzerColumn : MarketAnalyzerColumnBase
    {
        public Indicators.News News()
        {
            return indicator.News(Input);
        }

        public Indicators.News News(ISeries<double> input )
        {
            return indicator.News(input);
        }
    }
}

namespace NinjaTrader.NinjaScript.Strategies
{
    public partial class Strategy : NinjaTrader.Gui.NinjaScript.StrategyRenderBase
    {
        public Indicators.News News()
        {
            return indicator.News(Input);
        }

        public Indicators.News News(ISeries<double> input )
        {
            return indicator.News(input);
        }
    }
}

#endregion