MainForm.cs

using System;
using System.Globalization;
using System.IO;
using System.Windows.Forms;
using Gigasoft.ProEssentials;
using Gigasoft.ProEssentials.Enums;

namespace HeatmapSpectrogram
{
    /// <summary>
    /// ProEssentials WinForms Heatmap — Spectrogram — 2D Contour Chart  (.NET 8)
    ///
    /// Code-built WinForms port. 183 subsets × 512 points = 93,696 Z values
    /// rendered as a 2D contour heatmap (frequency vs time vs amplitude) via
    /// SGraphPlottingMethod.ContourColors, log Y axis, GPU ComputeShader.
    ///
    /// PORT NOTES (only host pieces changed; the data loader and the entire
    /// chart configuration are IDENTICAL to the WPF code-behind):
    ///   - MessageBox / MessageBoxButton.OK -> WinForms MessageBox / MessageBoxButtons.OK
    ///   - Application.Current.Shutdown()    -> Application.Exit()
    ///   - PesgoWpf control                  -> Pesgo
    ///   (No explicit colors — uses ContourColorSet enum — so the WPF
    ///    System.Windows.Media using simply drops.)
    /// </summary>
    public class MainForm : Form
    {
        private Pesgo Pesgo1;

        public MainForm()
        {
            Pesgo1 = new Pesgo();
            Pesgo1.Dock = DockStyle.Fill;
            Controls.Add(Pesgo1);

            Text = "ProEssentials — WinForms Heatmap Spectrogram 2D Contour";
            ClientSize = new System.Drawing.Size(1400, 900);
            MinimumSize = new System.Drawing.Size(900, 500);
            StartPosition = FormStartPosition.CenterScreen;

            this.Load += MainForm_Load;
            this.FormClosing += MainForm_FormClosing;
        }

        // -----------------------------------------------------------------------
        // MainForm_Load — chart initialization (WinForms Form.Load)
        // BELOW: IDENTICAL to WPF.
        // -----------------------------------------------------------------------
        private void MainForm_Load(object sender, EventArgs e)
        {
            // Step 1 — Declare data dimensions
            Pesgo1.PeData.Subsets = 183;
            Pesgo1.PeData.Points  = 512;

            Pesgo1.PeData.DuplicateDataX = DuplicateData.PointIncrement;
            Pesgo1.PeData.DuplicateDataY = DuplicateData.SubsetIncrement;

            Pesgo1.PeData.X[0, 511]   = 0;
            Pesgo1.PeData.Y[0, 182]   = 0;
            Pesgo1.PeData.Z[182, 511] = 0;

            // Step 2 — Load Heatmap.txt
            int nSubsetCount = 0;
            int nPointCount  = 0;

            string[] fileArray = { "", "" };
            try
            {
                fileArray = File.ReadAllLines("Heatmap.txt");
            }
            catch
            {
                MessageBox.Show(
                    "Heatmap.txt not found.\n\nMake sure Heatmap.txt is in the same folder as the executable.",
                    "File Not Found", MessageBoxButtons.OK);
                Application.Exit();
                return;
            }

            for (int i = 0; i < fileArray.Length; i++)
            {
                string line = fileArray[i];
                if (line.Length < 3) continue;

                var columns = line.Split('\t');
                float fX = float.Parse(columns[0], CultureInfo.InvariantCulture.NumberFormat);
                float fY = float.Parse(columns[1], CultureInfo.InvariantCulture.NumberFormat);
                float fZ = float.Parse(columns[2], CultureInfo.InvariantCulture.NumberFormat);

                if (nSubsetCount == 0)
                    Pesgo1.PeData.X[0, nPointCount] = fX + 20.0F;

                if (nPointCount == 0)
                    Pesgo1.PeData.Y[0, nSubsetCount] = fY * (i + 1000) / 100.0F;

                Pesgo1.PeData.Z[nSubsetCount, nPointCount] = fZ;

                nPointCount++;
                if (nPointCount > 511)
                {
                    nPointCount = 0;
                    nSubsetCount++;
                }
            }

            // Step 3 — Axis scale
            Pesgo1.PeGrid.Configure.YAxisScaleControl = Gigasoft.ProEssentials.Enums.ScaleControl.Log;

            // Step 4 — Visual styling — dark theme
            Pesgo1.PeColor.BitmapGradientMode = true;
            Pesgo1.PeColor.QuickStyle         = QuickStyle.DarkNoBorder;
            Pesgo1.PeColor.GridBold           = true;

            // Step 5 — Contour color plotting method
            Pesgo1.PePlot.Allow.ContourColors        = true;
            Pesgo1.PePlot.Allow.ContourColorsShadows = true;

            Pesgo1.PeColor.ContourColorBlends = 10;
            // ContourColorBlends must always be set BEFORE ContourColorSet
            Pesgo1.PeColor.ContourColorSet = ContourColorSet.BlueCyanGreenYellowBrownWhite;

            Pesgo1.PeLegend.ContourLegendPrecision = ContourLegendPrecision.ZeroDecimals;
            Pesgo1.PeLegend.ContourStyle           = true;

            Pesgo1.PePlot.Method = SGraphPlottingMethod.ContourColors;

            Pesgo1.PeUserInterface.Menu.DataShadow = MenuControl.Hide;

            // Step 6 — Zoom and interaction
            Pesgo1.PeUserInterface.Scrollbar.MouseWheelZoomFactor     = 1.4F;
            Pesgo1.PeUserInterface.Scrollbar.MouseWheelZoomSmoothness = 2;
            Pesgo1.PeGrid.GridBands                                   = false;

            Pesgo1.PeUserInterface.Allow.ZoomStyle    = ZoomStyle.Ro2Not;
            Pesgo1.PeUserInterface.Allow.Zooming      = AllowZooming.HorzAndVert;
            Pesgo1.PeUserInterface.Scrollbar.MouseWheelFunction = MouseWheelFunction.HorizontalVerticalZoom;

            Pesgo1.PeUserInterface.Scrollbar.ScrollingVertZoom = true;
            Pesgo1.PeUserInterface.Scrollbar.ScrollingHorzZoom = true;

            // Step 7 — Legend and grid
            Pesgo1.PeLegend.Location  = LegendLocation.Left;

            Pesgo1.PeGrid.InFront     = true;
            Pesgo1.PeGrid.LineControl = GridLineControl.Both;
            Pesgo1.PeGrid.Style       = GridStyle.Dot;

            // Step 8 — Disable non-contour plot methods from the right-click menu
            Pesgo1.PePlot.Allow.Line             = false;
            Pesgo1.PePlot.Allow.Point            = false;
            Pesgo1.PePlot.Allow.Bar              = false;
            Pesgo1.PePlot.Allow.Area             = false;
            Pesgo1.PePlot.Allow.Spline           = false;
            Pesgo1.PePlot.Allow.SplineArea       = false;
            Pesgo1.PePlot.Allow.PointsPlusLine   = false;
            Pesgo1.PePlot.Allow.PointsPlusSpline = false;
            Pesgo1.PePlot.Allow.BestFitCurve     = false;
            Pesgo1.PePlot.Allow.BestFitLine      = false;
            Pesgo1.PePlot.Allow.Stick            = false;

            // Step 9 — Titles and fonts
            Pesgo1.PeString.MainTitle = "Wave Data - Heatmap - Spectrogram Example";
            Pesgo1.PeString.SubTitle  = "";

            Pesgo1.PeGrid.Configure.AutoMinMaxPadding = 0;

            Pesgo1.PeFont.FontSize = Gigasoft.ProEssentials.Enums.FontSize.Large;
            Pesgo1.PeFont.Fixed    = true;

            Pesgo1.PeUserInterface.Dialog.Axis    = false;
            Pesgo1.PeUserInterface.Dialog.Style   = false;
            Pesgo1.PeUserInterface.Dialog.Subsets = false;

            Pesgo1.PeConfigure.TextShadows = TextShadows.BoldText;
            Pesgo1.PeFont.MainTitle.Bold   = true;
            Pesgo1.PeFont.SubTitle.Bold    = true;
            Pesgo1.PeFont.Label.Bold       = true;

            // Step 10 — Export defaults
            Pesgo1.PeSpecial.DpiX = 600;
            Pesgo1.PeSpecial.DpiY = 600;
            Pesgo1.PeUserInterface.Dialog.AllowEmfExport = false;
            Pesgo1.PeUserInterface.Dialog.AllowWmfExport = false;
            Pesgo1.PeUserInterface.Dialog.ExportSizeDef  = ExportSizeDef.NoSizeOrPixel;
            Pesgo1.PeUserInterface.Dialog.ExportTypeDef  = ExportTypeDef.Png;
            Pesgo1.PeUserInterface.Dialog.ExportDestDef  = ExportDestDef.Clipboard;
            Pesgo1.PeUserInterface.Dialog.ExportUnitXDef = "1280";
            Pesgo1.PeUserInterface.Dialog.ExportUnitYDef = "768";
            Pesgo1.PeUserInterface.Dialog.ExportImageDpi = 300;

            // Step 11 — Rendering engine
            Pesgo1.PeConfigure.Composite2D3D = Composite2D3D.Foreground;
            Pesgo1.PeConfigure.RenderEngine  = RenderEngine.Direct3D;
            Pesgo1.PeData.ComputeShader      = true;

            // Step 12 — Cursor prompt
            Pesgo1.PeUserInterface.Cursor.PromptTracking     = true;
            Pesgo1.PeUserInterface.Cursor.PromptStyle        = CursorPromptStyle.XYZValues;
            Pesgo1.PeUserInterface.Cursor.PromptLocation     = CursorPromptLocation.Text;
            Pesgo1.PeUserInterface.Cursor.HourGlassThreshold = 9999999;

            Pesgo1.PeFunction.Force3dxNewColors      = true;
            Pesgo1.PeFunction.Force3dxVerticeRebuild = true;

            Pesgo1.PeFunction.ReinitializeResetImage();
            Pesgo1.Invalidate();
        }

        // WPF Window.Closing -> WinForms FormClosing
        private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
        {
        }
    }
}