CenterText.java
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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2019 iText Group NV
Authors: iText Software.
For more information, please contact iText Software at this address:
sales@itextpdf.com
*/
/*
* Example written in answer to a question on StackOverflow.
* http://stackoverflow.com/questions/39437838
*/
package com.itextpdf.sandbox.text;
import com.itextpdf.kernel.colors.Color;
import com.itextpdf.kernel.colors.ColorConstants;
import com.itextpdf.kernel.geom.PageSize;
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.kernel.pdf.canvas.draw.ILineDrawer;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.element.Tab;
import com.itextpdf.layout.element.TabStop;
import com.itextpdf.layout.property.TabAlignment;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* @author bruno
*/
public class CenterText {
class MyLine implements ILineDrawer {
private float lineWidth = 1;
private float offset = 2.02f;
private Color color = ColorConstants.BLACK;
@Override
public void draw(PdfCanvas canvas, Rectangle drawArea) {
canvas.saveState()
.setStrokeColor(color)
.setLineWidth(lineWidth)
.moveTo(drawArea.getX(), drawArea.getY() + lineWidth / 2 + offset)
.lineTo(drawArea.getX() + drawArea.getWidth(), drawArea.getY() + lineWidth / 2 + offset)
.stroke()
.restoreState();
}
@Override
public float getLineWidth() {
return lineWidth;
}
@Override
public void setLineWidth(float lineWidth) {
this.lineWidth = lineWidth;
}
@Override
public Color getColor() {
return color;
}
@Override
public void setColor(Color color) {
this.color = color;
}
public float getOffset() {
return offset;
}
public void setOffset(float poffset) {
this.offset = offset;
}
}
public static final String DEST = "results/text/center_text.pdf";
public static void main(String[] args) throws IOException {
File file = new File(DEST);
file.getParentFile().mkdirs();
new CenterText().createPdf(DEST);
}
public void createPdf(String dest) throws IOException {
PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
PageSize pagesize = PageSize.A4;
Document document = new Document(pdf, pagesize);
float w = pagesize.getWidth() - document.getLeftMargin() - document.getRightMargin();
MyLine line = new MyLine();
List<TabStop> tabstops = new ArrayList();
tabstops.add(new TabStop(w / 2, TabAlignment.CENTER, line));
tabstops.add(new TabStop(w, TabAlignment.LEFT, line));
Paragraph p = new Paragraph();
p.addTabStops(tabstops);
p.add(new Tab()).add("Text in the middle").add(new Tab());
document.add(p);
document.close();
}
}