Initial sector heatmap generator

.gitignore

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+.vs/
+
+[Bb]in/
+[Oo]bj/
+
+*.user
+*.suo
+*.userosscache
+*.sln.docstates
+
+TestResult*/
+*.log

mbn_stock.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.35731.53
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "mbn_stock", "mbn_stock\mbn_stock.csproj", "{C3638A86-3DDE-40D7-B896-A58DFC53E372}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{C3638A86-3DDE-40D7-B896-A58DFC53E372}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C3638A86-3DDE-40D7-B896-A58DFC53E372}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C3638A86-3DDE-40D7-B896-A58DFC53E372}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C3638A86-3DDE-40D7-B896-A58DFC53E372}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {C7AE5942-0C77-477D-A577-5D5787EDFC50}
+	EndGlobalSection
+EndGlobal

mbn_stock/App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
+    </startup>
+</configuration>

mbn_stock/Form1.Designer.cs

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+
+namespace mbn_stock
+{
+    partial class Form1
+    {
+        /// <summary>
+        /// 필수 디자이너 변수입니다.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// 사용 중인 모든 리소스를 정리합니다.
+        /// </summary>
+        /// <param name="disposing">관리되는 리소스를 삭제해야 하면 true이고, 그렇지 않으면 false입니다.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form 디자이너에서 생성한 코드
+
+        /// <summary>
+        /// 디자이너 지원에 필요한 메서드입니다. 
+        /// 이 메서드의 내용을 코드 편집기로 수정하지 마세요.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.components = new System.ComponentModel.Container();
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(1280, 760);
+            this.Text = "업종별 증시 이미지 생성기";
+        }
+
+        #endregion
+    }
+}
+

mbn_stock/Form1.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.Globalization;
+using System.Linq;
+using System.Windows.Forms;
+
+namespace mbn_stock
+{
+    public partial class Form1 : Form
+    {
+        private readonly BindingList<SectorHeatMapItem> _items = new BindingList<SectorHeatMapItem>();
+        private readonly Random _random = new Random();
+
+        private DataGridView _grid;
+        private PictureBox _previewBox;
+        private Button _randomButton;
+        private Button _saveButton;
+        private Label _statusLabel;
+        private bool _loading;
+
+        public Form1()
+        {
+            InitializeComponent();
+            BuildUi();
+            LoadDefaultItems();
+            RandomizeValues();
+        }
+
+        protected override void OnFormClosed(FormClosedEventArgs e)
+        {
+            if (_previewBox != null && _previewBox.Image != null)
+            {
+                _previewBox.Image.Dispose();
+                _previewBox.Image = null;
+            }
+
+            base.OnFormClosed(e);
+        }
+
+        private void BuildUi()
+        {
+            Font = new Font("Malgun Gothic", 9.5f, FontStyle.Regular, GraphicsUnit.Point);
+            BackColor = Color.FromArgb(245, 246, 248);
+            MinimumSize = new Size(1100, 700);
+
+            SplitContainer splitContainer = new SplitContainer();
+            splitContainer.Dock = DockStyle.Fill;
+            splitContainer.FixedPanel = FixedPanel.Panel1;
+            splitContainer.SplitterDistance = 500;
+            splitContainer.Panel1MinSize = 420;
+            splitContainer.Panel2MinSize = 520;
+            splitContainer.BackColor = Color.FromArgb(210, 214, 220);
+
+            Panel leftPanel = new Panel();
+            leftPanel.Dock = DockStyle.Fill;
+            leftPanel.Padding = new Padding(14);
+            leftPanel.BackColor = Color.White;
+
+            FlowLayoutPanel toolbar = new FlowLayoutPanel();
+            toolbar.Dock = DockStyle.Top;
+            toolbar.Height = 46;
+            toolbar.FlowDirection = FlowDirection.LeftToRight;
+            toolbar.WrapContents = false;
+
+            _randomButton = new Button();
+            _randomButton.Text = "랜덤 값";
+            _randomButton.Width = 110;
+            _randomButton.Height = 32;
+            _randomButton.Click += RandomButton_Click;
+
+            _saveButton = new Button();
+            _saveButton.Text = "PNG 저장";
+            _saveButton.Width = 110;
+            _saveButton.Height = 32;
+            _saveButton.Click += SaveButton_Click;
+
+            toolbar.Controls.Add(_randomButton);
+            toolbar.Controls.Add(_saveButton);
+
+            _grid = new DataGridView();
+            _grid.Dock = DockStyle.Fill;
+            _grid.AutoGenerateColumns = false;
+            _grid.AllowUserToAddRows = false;
+            _grid.AllowUserToDeleteRows = false;
+            _grid.AllowUserToResizeRows = false;
+            _grid.RowHeadersVisible = false;
+            _grid.SelectionMode = DataGridViewSelectionMode.CellSelect;
+            _grid.MultiSelect = false;
+            _grid.BackgroundColor = Color.White;
+            _grid.BorderStyle = BorderStyle.FixedSingle;
+            _grid.EnableHeadersVisualStyles = false;
+            _grid.ColumnHeadersDefaultCellStyle.BackColor = Color.FromArgb(238, 241, 245);
+            _grid.ColumnHeadersDefaultCellStyle.ForeColor = Color.FromArgb(30, 35, 45);
+            _grid.ColumnHeadersDefaultCellStyle.Font = new Font(Font, FontStyle.Bold);
+            _grid.DefaultCellStyle.SelectionBackColor = Color.FromArgb(218, 232, 255);
+            _grid.DefaultCellStyle.SelectionForeColor = Color.FromArgb(20, 24, 32);
+            _grid.DataError += Grid_DataError;
+            _grid.CellEndEdit += Grid_CellEndEdit;
+            _grid.CellParsing += Grid_CellParsing;
+            _grid.CellValidating += Grid_CellValidating;
+
+            DataGridViewTextBoxColumn nameColumn = new DataGridViewTextBoxColumn();
+            nameColumn.DataPropertyName = "Name";
+            nameColumn.HeaderText = "업종";
+            nameColumn.ReadOnly = true;
+            nameColumn.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
+            nameColumn.FillWeight = 130f;
+
+            DataGridViewTextBoxColumn capColumn = new DataGridViewTextBoxColumn();
+            capColumn.DataPropertyName = "MarketCap";
+            capColumn.HeaderText = "시가총액";
+            capColumn.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
+            capColumn.FillWeight = 90f;
+            capColumn.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight;
+            capColumn.DefaultCellStyle.Format = "N0";
+
+            DataGridViewTextBoxColumn rateColumn = new DataGridViewTextBoxColumn();
+            rateColumn.DataPropertyName = "ChangeRate";
+            rateColumn.HeaderText = "등락률(%)";
+            rateColumn.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
+            rateColumn.FillWeight = 90f;
+            rateColumn.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight;
+            rateColumn.DefaultCellStyle.Format = "+0.00;-0.00;0.00";
+
+            _grid.Columns.Add(nameColumn);
+            _grid.Columns.Add(capColumn);
+            _grid.Columns.Add(rateColumn);
+            _grid.DataSource = _items;
+
+            _statusLabel = new Label();
+            _statusLabel.Dock = DockStyle.Bottom;
+            _statusLabel.Height = 30;
+            _statusLabel.TextAlign = ContentAlignment.MiddleLeft;
+            _statusLabel.ForeColor = Color.FromArgb(80, 86, 96);
+
+            leftPanel.Controls.Add(_grid);
+            leftPanel.Controls.Add(toolbar);
+            leftPanel.Controls.Add(_statusLabel);
+
+            Panel previewPanel = new Panel();
+            previewPanel.Dock = DockStyle.Fill;
+            previewPanel.Padding = new Padding(14);
+            previewPanel.BackColor = Color.FromArgb(29, 32, 39);
+
+            _previewBox = new PictureBox();
+            _previewBox.Dock = DockStyle.Fill;
+            _previewBox.BackColor = Color.FromArgb(20, 22, 28);
+            _previewBox.SizeMode = PictureBoxSizeMode.Zoom;
+
+            previewPanel.Controls.Add(_previewBox);
+            splitContainer.Panel1.Controls.Add(leftPanel);
+            splitContainer.Panel2.Controls.Add(previewPanel);
+
+            Controls.Add(splitContainer);
+        }
+
+        private void LoadDefaultItems()
+        {
+            _loading = true;
+            _items.Clear();
+
+            string[] sectors =
+            {
+                "전기전자",
+                "금융업",
+                "서비스업",
+                "운수장비",
+                "화학",
+                "통신업",
+                "의약품",
+                "철강금속",
+                "유통업",
+                "건설업",
+                "음식료품",
+                "기계",
+                "운수창고",
+                "전기가스업",
+                "보험",
+                "증권"
+            };
+
+            foreach (string sector in sectors)
+            {
+                _items.Add(new SectorHeatMapItem
+                {
+                    Name = sector,
+                    MarketCap = 100m,
+                    ChangeRate = 0m
+                });
+            }
+
+            _loading = false;
+        }
+
+        private void RandomizeValues()
+        {
+            _loading = true;
+
+            foreach (SectorHeatMapItem item in _items)
+            {
+                item.MarketCap = _random.Next(25, 260);
+                item.ChangeRate = Math.Round((decimal)(_random.NextDouble() * 60d - 30d), 2);
+            }
+
+            _loading = false;
+            _grid.Refresh();
+            RefreshPreview();
+        }
+
+        private void RefreshPreview()
+        {
+            if (_loading || _previewBox == null)
+            {
+                return;
+            }
+
+            List<SectorHeatMapItem> snapshot = _items
+                .Select(item => new SectorHeatMapItem
+                {
+                    Name = item.Name,
+                    MarketCap = item.MarketCap,
+                    ChangeRate = item.ChangeRate
+                })
+                .ToList();
+
+            Bitmap newImage = HeatMapRenderer.Render(snapshot);
+            Image oldImage = _previewBox.Image;
+            _previewBox.Image = newImage;
+
+            if (oldImage != null)
+            {
+                oldImage.Dispose();
+            }
+
+            _statusLabel.Text = string.Format(
+                CultureInfo.CurrentCulture,
+                "출력 {0:N0} x {1:N0}px / 색상 기준 ±{2:N0}%",
+                HeatMapRenderer.ExportWidth,
+                HeatMapRenderer.ExportHeight,
+                HeatMapRenderer.MaxRatePercent);
+        }
+
+        private void RandomButton_Click(object sender, EventArgs e)
+        {
+            RandomizeValues();
+        }
+
+        private void SaveButton_Click(object sender, EventArgs e)
+        {
+            if (!_grid.EndEdit())
+            {
+                _statusLabel.Text = "입력값을 확인해 주세요.";
+                return;
+            }
+
+            using (SaveFileDialog dialog = new SaveFileDialog())
+            {
+                dialog.Filter = "PNG 이미지 (*.png)|*.png";
+                dialog.FileName = "sector_heatmap_" + DateTime.Now.ToString("yyyyMMdd_HHmmss", CultureInfo.InvariantCulture) + ".png";
+                dialog.Title = "업종별 증시 이미지 저장";
+
+                if (dialog.ShowDialog(this) != DialogResult.OK)
+                {
+                    return;
+                }
+
+                using (Bitmap bitmap = HeatMapRenderer.Render(_items))
+                {
+                    bitmap.Save(dialog.FileName, ImageFormat.Png);
+                }
+
+                _statusLabel.Text = "저장 완료: " + dialog.FileName;
+            }
+        }
+
+        private void Grid_CellEndEdit(object sender, DataGridViewCellEventArgs e)
+        {
+            RefreshPreview();
+        }
+
+        private void Grid_CellParsing(object sender, DataGridViewCellParsingEventArgs e)
+        {
+            if (_grid.Columns[e.ColumnIndex].DataPropertyName == "Name")
+            {
+                return;
+            }
+
+            decimal value;
+            string text = Convert.ToString(e.Value, CultureInfo.CurrentCulture);
+
+            if (TryParseDecimal(text, out value))
+            {
+                e.Value = value;
+                e.ParsingApplied = true;
+            }
+        }
+
+        private void Grid_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
+        {
+            if (_grid.Columns[e.ColumnIndex].DataPropertyName == "Name")
+            {
+                return;
+            }
+
+            decimal value;
+            string text = Convert.ToString(e.FormattedValue, CultureInfo.CurrentCulture);
+
+            if (!TryParseDecimal(text, out value))
+            {
+                e.Cancel = true;
+                _grid.Rows[e.RowIndex].ErrorText = "숫자를 입력하세요.";
+                return;
+            }
+
+            if (_grid.Columns[e.ColumnIndex].DataPropertyName == "MarketCap" && value <= 0m)
+            {
+                e.Cancel = true;
+                _grid.Rows[e.RowIndex].ErrorText = "시가총액은 0보다 커야 합니다.";
+                return;
+            }
+
+            _grid.Rows[e.RowIndex].ErrorText = string.Empty;
+        }
+
+        private void Grid_DataError(object sender, DataGridViewDataErrorEventArgs e)
+        {
+            e.ThrowException = false;
+            _statusLabel.Text = "입력값을 확인해 주세요.";
+        }
+
+        private static bool TryParseDecimal(string text, out decimal value)
+        {
+            value = 0m;
+
+            if (text == null)
+            {
+                return false;
+            }
+
+            string normalized = text.Trim().Replace("%", string.Empty);
+            return decimal.TryParse(normalized, NumberStyles.Number, CultureInfo.CurrentCulture, out value)
+                || decimal.TryParse(normalized, NumberStyles.Number, CultureInfo.InvariantCulture, out value);
+        }
+    }
+}

mbn_stock/HeatMapRenderer.cs

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+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+using System.Drawing.Imaging;
+using System.Drawing.Text;
+using System.Globalization;
+using System.Linq;
+
+namespace mbn_stock
+{
+    public static class HeatMapRenderer
+    {
+        public const int ExportWidth = 1920;
+        public const int ExportHeight = 1080;
+        public const decimal MaxRatePercent = 30m;
+
+        private const float TileGap = 6f;
+        private static readonly float TileRadius = 0f;
+
+        public static Bitmap Render(IEnumerable<SectorHeatMapItem> sourceItems)
+        {
+            return Render(sourceItems, new Size(ExportWidth, ExportHeight));
+        }
+
+        public static Bitmap Render(IEnumerable<SectorHeatMapItem> sourceItems, Size size)
+        {
+            Bitmap bitmap = new Bitmap(size.Width, size.Height, PixelFormat.Format32bppArgb);
+
+            using (Graphics graphics = Graphics.FromImage(bitmap))
+            {
+                graphics.SmoothingMode = SmoothingMode.AntiAlias;
+                graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
+                graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
+                graphics.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
+                graphics.Clear(Color.FromArgb(20, 22, 28));
+
+                List<SectorHeatMapItem> items = sourceItems
+                    .Where(item => item != null && item.MarketCap > 0m)
+                    .OrderByDescending(item => item.MarketCap)
+                    .ToList();
+
+                if (items.Count == 0)
+                {
+                    DrawEmptyMessage(graphics, new RectangleF(0, 0, size.Width, size.Height));
+                    return bitmap;
+                }
+
+                RectangleF canvas = new RectangleF(0, 0, size.Width, size.Height);
+                List<TreeMapNode> nodes = BuildNodes(items, canvas);
+                DrawTiles(graphics, nodes);
+            }
+
+            return bitmap;
+        }
+
+        private static List<TreeMapNode> BuildNodes(IList<SectorHeatMapItem> items, RectangleF bounds)
+        {
+            decimal total = items.Sum(item => item.MarketCap);
+            double totalArea = bounds.Width * bounds.Height;
+            List<TreeMapNode> nodes = new List<TreeMapNode>();
+
+            foreach (SectorHeatMapItem item in items)
+            {
+                double area = decimal.ToDouble(item.MarketCap / total) * totalArea;
+                nodes.Add(new TreeMapNode(item, area));
+            }
+
+            List<TreeMapNode> result = new List<TreeMapNode>();
+            LayoutBinary(nodes, bounds, result);
+            return result;
+        }
+
+        private static void LayoutBinary(IList<TreeMapNode> nodes, RectangleF bounds, List<TreeMapNode> result)
+        {
+            if (nodes.Count == 0)
+            {
+                return;
+            }
+
+            if (nodes.Count == 1)
+            {
+                nodes[0].Bounds = bounds;
+                result.Add(nodes[0]);
+                return;
+            }
+
+            double totalArea = nodes.Sum(node => node.Area);
+            int splitIndex = FindBalancedSplit(nodes, totalArea);
+            List<TreeMapNode> firstGroup = nodes.Take(splitIndex).ToList();
+            List<TreeMapNode> secondGroup = nodes.Skip(splitIndex).ToList();
+            double firstArea = firstGroup.Sum(node => node.Area);
+            float firstRatio = (float)(firstArea / totalArea);
+
+            if (bounds.Width >= bounds.Height)
+            {
+                float firstWidth = bounds.Width * firstRatio;
+                RectangleF firstBounds = new RectangleF(bounds.X, bounds.Y, firstWidth, bounds.Height);
+                RectangleF secondBounds = new RectangleF(bounds.X + firstWidth, bounds.Y, bounds.Width - firstWidth, bounds.Height);
+
+                LayoutBinary(firstGroup, firstBounds, result);
+                LayoutBinary(secondGroup, secondBounds, result);
+                return;
+            }
+
+            float firstHeight = bounds.Height * firstRatio;
+            RectangleF topBounds = new RectangleF(bounds.X, bounds.Y, bounds.Width, firstHeight);
+            RectangleF bottomBounds = new RectangleF(bounds.X, bounds.Y + firstHeight, bounds.Width, bounds.Height - firstHeight);
+
+            LayoutBinary(firstGroup, topBounds, result);
+            LayoutBinary(secondGroup, bottomBounds, result);
+        }
+
+        private static int FindBalancedSplit(IList<TreeMapNode> nodes, double totalArea)
+        {
+            double target = totalArea / 2d;
+            double running = 0d;
+            double bestDifference = double.MaxValue;
+            int splitIndex = 1;
+
+            for (int index = 0; index < nodes.Count - 1; index++)
+            {
+                running += nodes[index].Area;
+                double difference = Math.Abs(target - running);
+
+                if (difference <= bestDifference)
+                {
+                    bestDifference = difference;
+                    splitIndex = index + 1;
+                }
+            }
+
+            return splitIndex;
+        }
+
+        private static void DrawTiles(Graphics graphics, IList<TreeMapNode> nodes)
+        {
+            foreach (TreeMapNode node in nodes)
+            {
+                RectangleF tileBounds = Inset(node.Bounds, TileGap / 2f);
+                if (tileBounds.Width <= 1f || tileBounds.Height <= 1f)
+                {
+                    continue;
+                }
+
+                Color fill = GetFillColor(node.Item.ChangeRate);
+                using (Brush brush = new SolidBrush(fill))
+                using (Pen borderPen = new Pen(Color.FromArgb(70, 255, 255, 255), 1.5f))
+                {
+                    if (TileRadius <= 0f)
+                    {
+                        graphics.FillRectangle(brush, tileBounds);
+                        graphics.DrawRectangle(borderPen, tileBounds.X, tileBounds.Y, tileBounds.Width, tileBounds.Height);
+                    }
+                    else
+                    {
+                        using (GraphicsPath path = CreateRoundedRectangle(tileBounds, TileRadius))
+                        {
+                            graphics.FillPath(brush, path);
+                            graphics.DrawPath(borderPen, path);
+                        }
+                    }
+                }
+
+                DrawTileText(graphics, node.Item, tileBounds, fill);
+            }
+        }
+
+        private static void DrawTileText(Graphics graphics, SectorHeatMapItem item, RectangleF tileBounds, Color fill)
+        {
+            RectangleF textBounds = Inset(tileBounds, Math.Max(10f, Math.Min(tileBounds.Width, tileBounds.Height) * 0.07f));
+            if (textBounds.Width <= 8f || textBounds.Height <= 8f)
+            {
+                textBounds = Inset(tileBounds, 2f);
+            }
+
+            Color textColor = GetReadableTextColor(fill);
+            string rateText = FormatRate(item.ChangeRate);
+            float fontSize = FindFittingFontSize(graphics, item.Name, rateText, textBounds);
+            float rateFontSize = Math.Max(8f, fontSize * 0.78f);
+
+            using (Font nameFont = new Font("Malgun Gothic", fontSize, FontStyle.Bold, GraphicsUnit.Pixel))
+            using (Font rateFont = new Font("Malgun Gothic", rateFontSize, FontStyle.Bold, GraphicsUnit.Pixel))
+            using (Brush textBrush = new SolidBrush(textColor))
+            using (StringFormat centerFormat = new StringFormat())
+            {
+                centerFormat.Alignment = StringAlignment.Center;
+                centerFormat.LineAlignment = StringAlignment.Center;
+                centerFormat.Trimming = StringTrimming.EllipsisCharacter;
+                centerFormat.FormatFlags = StringFormatFlags.NoWrap;
+
+                float nameHeight = nameFont.GetHeight(graphics);
+                float rateHeight = rateFont.GetHeight(graphics);
+                float totalHeight = nameHeight + rateHeight + Math.Max(2f, fontSize * 0.12f);
+                float top = textBounds.Y + (textBounds.Height - totalHeight) / 2f;
+
+                RectangleF nameRect = new RectangleF(textBounds.X, top, textBounds.Width, nameHeight + 4f);
+                RectangleF rateRect = new RectangleF(textBounds.X, top + nameHeight + Math.Max(2f, fontSize * 0.12f), textBounds.Width, rateHeight + 4f);
+
+                graphics.DrawString(item.Name, nameFont, textBrush, nameRect, centerFormat);
+                graphics.DrawString(rateText, rateFont, textBrush, rateRect, centerFormat);
+            }
+        }
+
+        private static float FindFittingFontSize(Graphics graphics, string name, string rateText, RectangleF bounds)
+        {
+            float maxSize = Math.Min(96f, Math.Max(12f, Math.Min(bounds.Width * 0.18f, bounds.Height * 0.34f)));
+
+            for (float size = maxSize; size >= 8f; size -= 1f)
+            {
+                using (Font nameFont = new Font("Malgun Gothic", size, FontStyle.Bold, GraphicsUnit.Pixel))
+                using (Font rateFont = new Font("Malgun Gothic", Math.Max(8f, size * 0.78f), FontStyle.Bold, GraphicsUnit.Pixel))
+                {
+                    SizeF nameSize = graphics.MeasureString(name, nameFont);
+                    SizeF rateSize = graphics.MeasureString(rateText, rateFont);
+                    float totalHeight = nameFont.GetHeight(graphics) + rateFont.GetHeight(graphics) + Math.Max(2f, size * 0.12f);
+
+                    if (nameSize.Width <= bounds.Width * 0.96f &&
+                        rateSize.Width <= bounds.Width * 0.96f &&
+                        totalHeight <= bounds.Height * 0.92f)
+                    {
+                        return size;
+                    }
+                }
+            }
+
+            return 8f;
+        }
+
+        private static Color GetFillColor(decimal changeRate)
+        {
+            double intensity = Math.Min(1d, Math.Abs(decimal.ToDouble(changeRate)) / decimal.ToDouble(MaxRatePercent));
+
+            if (changeRate > 0m)
+            {
+                return Interpolate(Color.FromArgb(255, 206, 206), Color.FromArgb(204, 0, 0), intensity);
+            }
+
+            if (changeRate < 0m)
+            {
+                return Interpolate(Color.FromArgb(209, 225, 255), Color.FromArgb(0, 70, 190), intensity);
+            }
+
+            return Color.FromArgb(226, 228, 232);
+        }
+
+        private static Color Interpolate(Color from, Color to, double amount)
+        {
+            amount = Math.Max(0d, Math.Min(1d, amount));
+            int r = (int)Math.Round(from.R + (to.R - from.R) * amount);
+            int g = (int)Math.Round(from.G + (to.G - from.G) * amount);
+            int b = (int)Math.Round(from.B + (to.B - from.B) * amount);
+            return Color.FromArgb(r, g, b);
+        }
+
+        private static Color GetReadableTextColor(Color background)
+        {
+            double luminance = (0.299d * background.R) + (0.587d * background.G) + (0.114d * background.B);
+            return luminance < 145d ? Color.White : Color.FromArgb(24, 28, 36);
+        }
+
+        private static string FormatRate(decimal value)
+        {
+            string format = value > 0m ? "+0.00'%'"
+                : value < 0m ? "0.00'%'"
+                : "0.00'%'";
+
+            return value.ToString(format, CultureInfo.InvariantCulture);
+        }
+
+        private static RectangleF Inset(RectangleF rectangle, float padding)
+        {
+            float horizontal = Math.Min(padding, rectangle.Width / 2f - 0.5f);
+            float vertical = Math.Min(padding, rectangle.Height / 2f - 0.5f);
+
+            if (horizontal < 0f)
+            {
+                horizontal = 0f;
+            }
+
+            if (vertical < 0f)
+            {
+                vertical = 0f;
+            }
+
+            return new RectangleF(
+                rectangle.X + horizontal,
+                rectangle.Y + vertical,
+                Math.Max(1f, rectangle.Width - horizontal * 2f),
+                Math.Max(1f, rectangle.Height - vertical * 2f));
+        }
+
+        private static GraphicsPath CreateRoundedRectangle(RectangleF bounds, float radius)
+        {
+            float diameter = radius * 2f;
+            GraphicsPath path = new GraphicsPath();
+            path.AddArc(bounds.X, bounds.Y, diameter, diameter, 180, 90);
+            path.AddArc(bounds.Right - diameter, bounds.Y, diameter, diameter, 270, 90);
+            path.AddArc(bounds.Right - diameter, bounds.Bottom - diameter, diameter, diameter, 0, 90);
+            path.AddArc(bounds.X, bounds.Bottom - diameter, diameter, diameter, 90, 90);
+            path.CloseFigure();
+            return path;
+        }
+
+        private static void DrawEmptyMessage(Graphics graphics, RectangleF bounds)
+        {
+            using (Font font = new Font("Malgun Gothic", 40f, FontStyle.Bold, GraphicsUnit.Pixel))
+            using (Brush brush = new SolidBrush(Color.White))
+            using (StringFormat format = new StringFormat())
+            {
+                format.Alignment = StringAlignment.Center;
+                format.LineAlignment = StringAlignment.Center;
+                graphics.DrawString("표시할 데이터가 없습니다.", font, brush, bounds, format);
+            }
+        }
+
+        private sealed class TreeMapNode
+        {
+            public TreeMapNode(SectorHeatMapItem item, double area)
+            {
+                Item = item;
+                Area = area;
+            }
+
+            public SectorHeatMapItem Item { get; private set; }
+
+            public double Area { get; private set; }
+
+            public RectangleF Bounds { get; set; }
+        }
+    }
+}

mbn_stock/Program.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace mbn_stock
+{
+    static class Program
+    {
+        /// <summary>
+        /// 해당 애플리케이션의 주 진입점입니다.
+        /// </summary>
+        [STAThread]
+        static void Main()
+        {
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+            Application.Run(new Form1());
+        }
+    }
+}

mbn_stock/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// 어셈블리에 대한 일반 정보는 다음 특성 집합을 통해 
+// 제어됩니다. 어셈블리와 관련된 정보를 수정하려면
+// 이러한 특성 값을 변경하세요.
+[assembly: AssemblyTitle("mbn_stock")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("mbn_stock")]
+[assembly: AssemblyCopyright("Copyright ©  2026")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// ComVisible을 false로 설정하면 이 어셈블리의 형식이 COM 구성 요소에 
+// 표시되지 않습니다. COM에서 이 어셈블리의 형식에 액세스하려면
+// 해당 형식에 대해 ComVisible 특성을 true로 설정하세요.
+[assembly: ComVisible(false)]
+
+// 이 프로젝트가 COM에 노출되는 경우 다음 GUID는 typelib의 ID를 나타냅니다.
+[assembly: Guid("c3638a86-3dde-40d7-b896-a58dfc53e372")]
+
+// 어셈블리의 버전 정보는 다음 네 가지 값으로 구성됩니다.
+//
+//      주 버전
+//      부 버전 
+//      빌드 번호
+//      수정 버전
+//
+// 모든 값을 지정하거나 아래와 같이 '*'를 사용하여 빌드 번호 및 수정 번호를
+// 기본값으로 할 수 있습니다.
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

mbn_stock/Properties/Resources.Designer.cs

@@ -0,0 +1,70 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     이 코드는 도구를 사용하여 생성되었습니다.
+//     런타임 버전:4.0.30319.42000
+//
+//     파일 내용을 변경하면 잘못된 동작이 발생할 수 있으며, 코드를 다시 생성하면
+//     이러한 변경 내용이 손실됩니다.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+
+namespace mbn_stock.Properties
+{
+    /// <summary>
+    ///   지역화된 문자열 등을 찾기 위한 강력한 형식의 리소스 클래스입니다.
+    /// </summary>
+    // 이 클래스는 ResGen 또는 Visual Studio와 같은 도구를 통해 StronglyTypedResourceBuilder
+    // 클래스에서 자동으로 생성되었습니다.
+    // 멤버를 추가하거나 제거하려면 .ResX 파일을 편집한 다음 /str 옵션을 사용하여
+    // ResGen을 다시 실행하거나 VS 프로젝트를 다시 빌드하십시오.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources
+    {
+
+        private static global::System.Resources.ResourceManager resourceMan;
+
+        private static global::System.Globalization.CultureInfo resourceCulture;
+
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources()
+        {
+        }
+
+        /// <summary>
+        ///   이 클래스에서 사용하는 캐시된 ResourceManager 인스턴스를 반환합니다.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager
+        {
+            get
+            {
+                if ((resourceMan == null))
+                {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("mbn_stock.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+
+        /// <summary>
+        ///   이 강력한 형식의 리소스 클래스를 사용하여 모든 리소스 조회에 대해 현재 스레드의 CurrentUICulture 속성을
+        ///   재정의합니다.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture
+        {
+            get
+            {
+                return resourceCulture;
+            }
+            set
+            {
+                resourceCulture = value;
+            }
+        }
+    }
+}

mbn_stock/Properties/Resources.resx

@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

mbn_stock/Properties/Settings.Designer.cs

@@ -0,0 +1,29 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+
+namespace mbn_stock.Properties
+{
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "11.0.0.0")]
+    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase
+    {
+
+        private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
+
+        public static Settings Default
+        {
+            get
+            {
+                return defaultInstance;
+            }
+        }
+    }
+}

mbn_stock/Properties/Settings.settings

@@ -0,0 +1,7 @@
+<?xml version='1.0' encoding='utf-8'?>
+<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)">
+  <Profiles>
+    <Profile Name="(Default)" />
+  </Profiles>
+  <Settings />
+</SettingsFile>

mbn_stock/SectorHeatMapItem.cs

@@ -0,0 +1,67 @@
+using System.ComponentModel;
+
+namespace mbn_stock
+{
+    public class SectorHeatMapItem : INotifyPropertyChanged
+    {
+        private string _name;
+        private decimal _marketCap;
+        private decimal _changeRate;
+
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        public string Name
+        {
+            get { return _name; }
+            set
+            {
+                if (_name == value)
+                {
+                    return;
+                }
+
+                _name = value;
+                OnPropertyChanged("Name");
+            }
+        }
+
+        public decimal MarketCap
+        {
+            get { return _marketCap; }
+            set
+            {
+                if (_marketCap == value)
+                {
+                    return;
+                }
+
+                _marketCap = value;
+                OnPropertyChanged("MarketCap");
+            }
+        }
+
+        public decimal ChangeRate
+        {
+            get { return _changeRate; }
+            set
+            {
+                if (_changeRate == value)
+                {
+                    return;
+                }
+
+                _changeRate = value;
+                OnPropertyChanged("ChangeRate");
+            }
+        }
+
+        private void OnPropertyChanged(string propertyName)
+        {
+            PropertyChangedEventHandler handler = PropertyChanged;
+            if (handler != null)
+            {
+                handler(this, new PropertyChangedEventArgs(propertyName));
+            }
+        }
+    }
+}

mbn_stock/mbn_stock.csproj

@@ -0,0 +1,82 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{C3638A86-3DDE-40D7-B896-A58DFC53E372}</ProjectGuid>
+    <OutputType>WinExe</OutputType>
+    <RootNamespace>mbn_stock</RootNamespace>
+    <AssemblyName>mbn_stock</AssemblyName>
+    <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Deployment" />
+    <Reference Include="System.Drawing" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Form1.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="Form1.Designer.cs">
+      <DependentUpon>Form1.cs</DependentUpon>
+    </Compile>
+    <Compile Include="HeatMapRenderer.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="SectorHeatMapItem.cs" />
+    <EmbeddedResource Include="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+      <SubType>Designer</SubType>
+    </EmbeddedResource>
+    <Compile Include="Properties\Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+    <None Include="Properties\Settings.settings">
+      <Generator>SettingsSingleFileGenerator</Generator>
+      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
+    </None>
+    <Compile Include="Properties\Settings.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Settings.settings</DependentUpon>
+      <DesignTimeSharedInput>True</DesignTimeSharedInput>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>