CODEWITHSUNDEEP
javapdfitextitext7
kevin811
kevin811

Reputation: 31

Placing text (numbers) at indicated positions

With a for-loop I iterate over a set of coordinates stored in matrix X, and draw circles at indicated positions (itextpdf used):

...
PdfDocument pdfDoc = new PdfDocument(new PdfWriter(fileName));

Document document = new Document(pdfDoc, new PageSize(one));

PdfCanvas canvas = new PdfCanvas(pdfDoc.addNewPage());

for (int i = 0; i < total; i++) {   

    canvas.circle(X[d * i + axisX], X[d * i + axisY], 1.0);
    canvas.fillStroke();
    // -- numbers (i+1) should be drawn beside the circles

}

How could I use the above for-loop and write the numbers beside the circles, as indicated above?

Upvotes: 0

Views: 294

Answers (1)

Bruno Lowagie
Bruno Lowagie

Reputation: 77606

There are many different ways to add text at absolute positions with iText 7.

Since you already have a PdfCanvas object, you can use the very low-level approach that consists of writing PDF syntax line by line:

canvas.beginText();
canvas.moveText(x, y);
canvas.showText("1");
canvas.endText();

This is explained in chapter 3 of the iText 7 jump-start tutorial.

Writing low-level PDF syntax is error-prone when you don't know the PDF reference by heart. There is also an easier way:

document.showTextAligned(new Paragraph("1"), x, y, TextAlignment.CENTER);

Now you don't have to worry about constructing a text object using beginText() and endText(); iText takes care of all the low-level syntax.

This is explained in chapter 2 of the building blocks tutorial.

Upvotes: 1

Related Questions