ColumnText and the font ascender

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31st May 2016

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    This file is part of the iText (R) project.
    Copyright (c) 1998-2016 iText Group NV


 * This example was written by Bruno Lowagie in answer to the following question:
package com.itextpdf.samples.sandbox.objects;

import com.itextpdf.kernel.color.Color;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.layout.ColumnDocumentRenderer;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.samples.GenericTest;
import com.itextpdf.test.annotations.type.SampleTest;

import org.junit.experimental.categories.Category;


public class ColumnTextAscender extends GenericTest {
    public static final String DEST = "./target/test/resources/sandbox/objects/column_text_ascender.pdf";

    public static void main(String[] args) throws Exception {
        File file = new File(DEST);
        new ColumnTextAscender().manipulatePdf(DEST);

    public void manipulatePdf(String dest) throws IOException {
        PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));
        Document doc = new Document(pdfDoc);
        Rectangle[] areas = new Rectangle[]{new Rectangle(50, 750, 200, 50), new Rectangle(300, 750, 200, 50)};
        // for canvas usage one should create a page
        for (Rectangle rect : areas) {
            new PdfCanvas(pdfDoc.getFirstPage()).setLineWidth(0.5f).setStrokeColor(Color.RED).rectangle(rect).stroke();
        doc.setRenderer(new ColumnDocumentRenderer(doc, areas));
        addColumn(doc, false);
        addColumn(doc, true);

    public void addColumn(Document doc, boolean useAscender) {
        Paragraph p = new Paragraph("This text is added at the top of the column.");
        // No setUseAscender(boolean). We can change leading instead. This is a bit different, but
        // for now we do not see the need to implement this method in iText7
        if (useAscender) {


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