ColumnText and the font ascender

Tags: ColumnTextleadingascenderspacingiText 7

For more info about this example, read the answer to the question How to adapt the position of the first line in ColumnText?

    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) {
File nameRaw URLUpdated
ColumnTextAscender.javaColumnTextAscender.java2016-08-12 4:24 pm