// The main sample driver.
public int CreatePDF(Stream stream)
{
GcPdfDocument doc = new GcPdfDocument();
// This will hold the llst of images so we can dispose them after saving the document:
List <IDisposable> disposables = new List <IDisposable>();
// Page footer:
var ftrImg = Image.FromFile(Path.Combine("Resources", "ImagesBis", "logo-GC-devsol.png"));
disposables.Add(ftrImg);
var fx = ftrImg.HorizontalResolution / 72f;
var fy = ftrImg.VerticalResolution / 72f;
var ftrRc = new RectangleF(
doc.PageSize.Width / 2 - ftrImg.Width / fx / 2,
doc.PageSize.Height - 40,
ftrImg.Width / fx,
ftrImg.Height / fy);
// Color for the title:
var colorBlue = Color.FromArgb(0x3B, 0x5C, 0xAA);
// Color for the highlights:
var colorRed = Color.Red;
// The text layout used to render text:
TextLayout tl = new TextLayout(72)
{
MaxWidth = doc.PageSize.Width,
MaxHeight = doc.PageSize.Height,
MarginLeft = 72,
MarginRight = 72,
MarginTop = 72,
MarginBottom = 72,
};
tl.DefaultFormat.Font = Font.FromFile(Path.Combine("Resources", "Fonts", "segoeui.ttf"));
tl.DefaultFormat.FontSize = 11;
var page = doc.NewPage();
addFtr();
var g = page.Graphics;
// Caption:
tl.TextAlignment = TextAlignment.Center;
tl.Append("Introduction\n", new TextFormat()
{
FontSize = 16, ForeColor = colorBlue
});
tl.Append("The Importance of Wetlands", new TextFormat()
{
FontSize = 13, ForeColor = colorBlue
});
tl.PerformLayout(true);
g.DrawTextLayout(tl, PointF.Empty);
// Move below the caption for the first para:
tl.MarginTop = tl.ContentHeight + 72 * 2;
tl.Clear();
tl.TextAlignment = TextAlignment.Leading;
tl.ParagraphSpacing = 12;
// For the first para we want a bigger initial letter, but no first line indent,
// so we render it separately from the rest of the text:
tl.Append(_paras[0].Substring(0, 1), new TextFormat(tl.DefaultFormat)
{
FontSize = 22
});
addPara(_paras[0].Substring(1));
tl.PerformLayout(true);
g.DrawTextLayout(tl, PointF.Empty);
// Account for the first para, and set up the text layout
// for the rest of the text (a TextLayout allows to render multiple paragraphs,
// but they all must have the same paragraph format):
tl.MarginTop = tl.ContentRectangle.Bottom;
tl.Clear();
tl.FirstLineIndent = 36;
// Add remaining paragraphs:
foreach (var para in _paras.Skip(1))
{
// Paragraphs starting with '::' indicate images to be rendered across the page width:
if (para.StartsWith("::"))
{
var img = Image.FromFile(Path.Combine("Resources", "ImagesBis", para.Substring(2)));
disposables.Add(img);
var w = tl.MaxWidth.Value - tl.MarginLeft - tl.MarginRight;
var h = (float)img.Height / (float)img.Width * w;
tl.AppendInlineObject(img, w, h);
tl.AppendLine();
}
else
{
addPara(para);
}
}
// Layout the paragraphs:
tl.PerformLayout(true);
// Text split options allow to implement widow and orphan control:
var tso = new TextSplitOptions(tl)
{
RestMarginTop = 72,
MinLinesInFirstParagraph = 2,
MinLinesInLastParagraph = 2,
};
// Image alignment used to render the pictures:
var ia = new ImageAlign(ImageAlignHorz.Left, ImageAlignVert.Top, true, true, true, false, false)
{
BestFit = true
};
// In a loop, split and render the text:
while (true)
{
var splitResult = tl.Split(tso, out TextLayout rest);
g = doc.Pages.Last.Graphics;
doc.Pages.Last.Graphics.DrawTextLayout(tl, PointF.Empty);
// Render all images that occurred on this page:
foreach (var io in tl.InlineObjects)
{
doc.Pages.Last.Graphics.DrawImage((Image)io.Object, io.ObjectRect.ToRectangleF(), null, ia);
}
// Break unless there is more to render:
if (splitResult != SplitResult.Split)
{
break;
}
// Assign the remaining text to the 'main' TextLayout, add a new page and continue:
tl = rest;
doc.Pages.Add();
addFtr();
}
// Save the PDF:
doc.Save(stream);
// Dispose images (can be done only after saving the document):
disposables.ForEach(d_ => d_.Dispose());
// Done:
return(doc.Pages.Count);
void addPara(string para)
{
// We implement a primitive markup to highlight some fragments in red:
var txt = para.Split(new string[] { "<red>", "</red>" }, StringSplitOptions.None);
for (int i = 0; i < txt.Length; ++i)
{
if (i % 2 == 0)
{
tl.Append(txt[i]);
}
else
{
tl.Append(txt[i], new TextFormat(tl.DefaultFormat)
{
ForeColor = colorRed
});
}
}
tl.AppendLine();
}
void addFtr()
{
doc.Pages.Last.Graphics.DrawImage(ftrImg, ftrRc, null, ImageAlign.StretchImage);
}
}
