printing via Page Setup, Print and Print Preview dialogs

diff --git a/windows/TileableImagePrinter.cs b/windows/TileableImagePrinter.cs
new file mode 100755 (executable)
index 0000000..f2d2e10
--- /dev/null
+++ b/windows/TileableImagePrinter.cs
@@ -0,0 +1,100 @@
+/* $Id$ $Revision$ */\r
+/* vim:set shiftwidth=4 ts=8: */\r
+\r
+/**********************************************************\r
+*      This software is part of the graphviz package      *\r
+*                http://www.graphviz.org/                 *\r
+*                                                         *\r
+*            Copyright (c) 1994-2008 AT&T Corp.           *\r
+*                and is licensed under the                *\r
+*            Common Public License, Version 1.0           *\r
+*                      by AT&T Corp.                      *\r
+*                                                         *\r
+*        Information and Software Systems Research        *\r
+*              AT&T Research, Florham Park NJ             *\r
+**********************************************************/\r
+\r
+using System;\r
+using System.Drawing;\r
+using System.Drawing.Printing;\r
+using System.Text;\r
+\r
+namespace Graphviz\r
+{\r
+       public class TileableImagePrinter\r
+       {\r
+               public TileableImagePrinter(PrintDocument document, Image image)\r
+               {\r
+                       _image = image;\r
+                       \r
+                       /* calculate imageable area = page area - margins */\r
+                       Rectangle bounds = document.DefaultPageSettings.Bounds;\r
+                       Margins margins = document.DefaultPageSettings.Margins;\r
+                       Rectangle pageBounds = new Rectangle(\r
+                               bounds.Location + new Size(margins.Left, margins.Right),\r
+                               bounds.Size - new Size(margins.Left + margins.Right, margins.Top + margins.Bottom));\r
+                       _pageSize = pageBounds.Size;\r
+                       _pageRegion = new Region(pageBounds);\r
+                       \r
+                       /* calculate image size in 1/100 of an inch */\r
+                       _imageSize = new SizeF(image.Size.Width * HUNDREDTH_INCH_PER_PIXEL,\r
+                               image.Size.Height * HUNDREDTH_INCH_PER_PIXEL);\r
+\r
+                       /* calculate how many page columns + rows required to tile out the image */\r
+                       _pageColumnCount = ((int)(_imageSize.Width / _pageSize.Width)) + 1;\r
+                       _pageRowCount = ((int)(_imageSize.Height / _pageSize.Height)) + 1;\r
+                       \r
+                       /* calculate the offset of the image on the first page, from page margins + 1/2 of difference between image size and total page size */\r
+                       _imageOffset = new PointF(\r
+                               pageBounds.Left + (_pageColumnCount * _pageSize.Width - _imageSize.Width) / 2.0f,\r
+                               pageBounds.Top + (_pageRowCount * _pageSize.Height - _imageSize.Height) / 2.0f);\r
+       \r
+                       /* start at page 0 */\r
+                       _page = 0;\r
+                       \r
+                       _printPage = delegate(object sender, PrintPageEventArgs eventArgs)\r
+                       {\r
+                               /* which page column + row we are printing */\r
+                               int pageColumn = _page % _pageColumnCount;\r
+                               int pageRow = _page / _pageColumnCount;\r
+\r
+                               /* clip to the imageable area and draw the offset image into it */\r
+                               eventArgs.Graphics.Clip = _pageRegion;\r
+                               eventArgs.Graphics.DrawImage(_image, new RectangleF(\r
+                                       _imageOffset - new SizeF(pageColumn * _pageSize.Width, pageRow * _pageSize.Height),\r
+                                       _imageSize));\r
+                                       \r
+                               /* only print column * row pages */\r
+                               eventArgs.HasMorePages = ++_page < _pageColumnCount * _pageRowCount;\r
+                       };\r
+                       \r
+                       _endPrint = delegate(object sender, PrintEventArgs eventArgs)\r
+                       {\r
+                               /* detach handlers from the print document */\r
+                               PrintDocument printDocument = (PrintDocument)sender;\r
+                               printDocument.PrintPage -= _printPage;\r
+                               printDocument.EndPrint -= _endPrint;\r
+                       };\r
+                       \r
+                       /* attach handlers to the print document */\r
+                       document.PrintPage += _printPage;\r
+                       document.EndPrint += _endPrint;\r
+       \r
+               }\r
+               \r
+               private const float HUNDREDTH_INCH_PER_PIXEL = 100.0f / 96.0f;\r
+               \r
+               private readonly Image _image;\r
+               \r
+               private readonly Size _pageSize;\r
+               private readonly Region _pageRegion;\r
+               private readonly SizeF _imageSize;\r
+               private readonly int _pageColumnCount;\r
+               private readonly int _pageRowCount;\r
+               private readonly PointF _imageOffset;\r
+               \r
+               private int _page;\r
+               \r
+               private readonly PrintPageEventHandler _printPage;\r
+               private readonly PrintEventHandler _endPrint;   }\r
+}\r