public static void Overlay(PdfDocument pdf, int pageNum, float x, float y, float width, float height, float fontSize, string background, string foreground, string text)
{
PdfFont font = PdfFontFactory.CreateFont(iText.IO.Font.Constants.StandardFonts.HELVETICA, iText.IO.Font.PdfEncodings.UTF8, true);
PdfPage page = pdf.GetPage(pageNum);
float fWidth = font.GetWidth(text, fontSize);
float fHeight = fontSize * 1.1f;
Rectangle r = new Rectangle(x, y, Math.Max(fWidth, width), Math.Max(fHeight, height));
Color bg = new Color(background);
Color fg = new Color(foreground);
PdfCanvas pdfCanvas = new PdfCanvas(page.NewContentStreamAfter(), page.GetResources(), page.GetDocument());
pdfCanvas.SetFillColorRgb(bg.r, bg.g, bg.b);
pdfCanvas.Rectangle(r);
pdfCanvas.Fill();
if (text != "")
{
pdfCanvas.SetFillColorRgb(fg.r, fg.g, fg.b);
Canvas canvas = new Canvas(pdfCanvas, pdf, new Rectangle(r.GetLeft(), r.GetBottom(), r.GetWidth(), r.GetHeight()));
iText.Layout.Element.Paragraph p = new iText.Layout.Element.Paragraph(text);
p.SetMarginLeft((r.GetWidth() - fWidth) * 0.5f);
p.SetMarginTop((r.GetHeight() - fHeight) * 0.5f);
p.SetFont(font);
p.SetFontSize(fontSize);
canvas.Add(p);
}
}
/// <summary>
/// Aggiunge una pagina con il testo specificato
/// </summary>
/// <param name="text"></param>
/// <param name="margintop"></param>
/// <param name="marginleft"></param>
public void AddBlankPageWithText(string text, float margintop = 20f, float marginleft = 20f, bool alignCenter = false)
{
//Aggiunge pagina vuota per evitare eccezione
var page = this.mDocument.AddNewPage(PageSize.A4);
iText.Kernel.Pdf.Canvas.PdfCanvas pdfCanvas = new iText.Kernel.Pdf.Canvas.PdfCanvas(page);
var canvas = new Canvas(pdfCanvas, page.GetCropBox());
var p = new iText.Layout.Element.Paragraph(text);
if (alignCenter)
{
p.SetTextAlignment(iText.Layout.Properties.TextAlignment.CENTER);
}
else
{
p.SetTextAlignment(iText.Layout.Properties.TextAlignment.LEFT);
}
p.SetMarginTop(margintop);
p.SetMarginLeft(marginleft);
canvas.Add(p);
canvas.Close();
this.NumPagesMerged++;
this.NumDocumentsMerged++;
}