PDF Logo function

PLibs/PdfHelperFW/PdfHelper.cs

@@ -3,6 +3,8 @@ using PdfSharp.Pdf;
 using System;
 using System.Collections.Generic;
 using System.Data;
+using System.Drawing;
+using System.IO;
 using System.Linq;
 using System.Text;
 
@@ -21,7 +23,7 @@ namespace PdfHelperFW
         readonly double FONT_SIZE = 6d;
 
         readonly int MARGIN_LEFT = 20;
-        readonly int MARGIN_TOP = 35;
+        readonly int MARGIN_TOP = 45;
 
         // Elements
         readonly double TIMESTAMP_CELL_WIDTH = 70;
@@ -33,7 +35,7 @@ namespace PdfHelperFW
 
         // Design
         readonly XSolidBrush HEADER_RECT_STYLE = new XSolidBrush(XColor.FromArgb(210, 51, 52));
-        readonly XPen RECT_EDGE_PEN = new XPen(XColor.FromArgb(34, 30, 32), 0.5d);
+        readonly XPen RECT_EDGE_PEN = new XPen(XColor.FromArgb(34, 30, 32), 0.25d);
         readonly XBrush HEADER_STRING_COLOR = new XSolidBrush(XColors.White);
         readonly XBrush STRING_COLOR = new XSolidBrush(XColor.FromArgb(34, 30, 32));
 
@@ -44,6 +46,15 @@ namespace PdfHelperFW
         XFont _boldFont;
         XStringFormat _format;
 
+        // Logo
+        readonly XImage LOGO_IMAGE;
+        readonly double LOGO_WIDTH;
+        readonly double LOGO_HEIGHT;
+        readonly double LOGO_X;
+        readonly double LOGO_Y;
+        readonly double LOGO_Y_MARGIN = 5;
+        MemoryStream _ms;
+
         public PdfHelper(DataTable table, int timestampColIdx = 0)
         {
             if (table.Columns.Count - 1 > MAX_CELL_COLUMN_COUNT)
@@ -66,6 +77,38 @@ namespace PdfHelperFW
             _format.Alignment = XStringAlignment.Center;
         }
 
+        public PdfHelper(DataTable table, string logoPath, double logoHeight, int timestampColIdx = 0) : this(table, timestampColIdx)
+        {
+            if (string.IsNullOrEmpty(logoPath) || !File.Exists(logoPath) ||
+                logoHeight >= MARGIN_TOP - LOGO_Y_MARGIN)
+                throw new ArgumentException($"Some arguments for logo are invalid");
+
+            LOGO_IMAGE = XImage.FromFile(logoPath);
+            LOGO_HEIGHT = logoHeight;
+            LOGO_WIDTH = LOGO_IMAGE.PointWidth * (LOGO_HEIGHT / LOGO_IMAGE.PointHeight);
+            LOGO_X = MARGIN_LEFT + TIMESTAMP_CELL_WIDTH + ALL_CELL_WIDTH - LOGO_WIDTH;
+            LOGO_Y = MARGIN_TOP - LOGO_HEIGHT - LOGO_Y_MARGIN;
+        }
+
+        public PdfHelper(DataTable table, Bitmap logoBitmap, double logoHeight, int timestampColIdx = 0) : this(table, timestampColIdx)
+        {
+            if (logoBitmap == null
+                || logoHeight >= MARGIN_TOP - LOGO_Y_MARGIN)
+                throw new ArgumentException($"Some arguments for logo are invalid");
+
+            _ms = new MemoryStream();
+
+            logoBitmap.Save(_ms, System.Drawing.Imaging.ImageFormat.Jpeg);
+            _ms.Position = 0;
+
+            LOGO_IMAGE = XImage.FromStream(_ms);
+
+            LOGO_HEIGHT = logoHeight;
+            LOGO_WIDTH = LOGO_IMAGE.PointWidth * (LOGO_HEIGHT / LOGO_IMAGE.PointHeight);
+            LOGO_X = MARGIN_LEFT + TIMESTAMP_CELL_WIDTH + ALL_CELL_WIDTH - LOGO_WIDTH;
+            LOGO_Y = MARGIN_TOP - LOGO_HEIGHT - LOGO_Y_MARGIN;
+        }
+
         public void Save(string targetPath)
         {
             for (int startRow = 0; startRow < _table.Rows.Count; startRow += ROW_COUNT_PER_PAGE)
@@ -74,6 +117,10 @@ namespace PdfHelperFW
                 page.Size = PdfSharp.PageSize.A4;
                 XGraphics gf = XGraphics.FromPdfPage(page);
 
+                // Logo
+                if (LOGO_IMAGE != null)
+                    gf.DrawImage(LOGO_IMAGE, LOGO_X, LOGO_Y, LOGO_WIDTH, LOGO_HEIGHT);
+
                 // Header
                 double x = MARGIN_LEFT;
                 double y = MARGIN_TOP;
@@ -133,6 +180,9 @@ namespace PdfHelperFW
             }
 
             _document.Save(targetPath);
+
+            if (_ms != null)
+                _ms.Dispose();
         }
     }
 }