org.esteco.jira.pdf.UsingTextMatrix.java Source code

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Here is the source code for org.esteco.jira.pdf.UsingTextMatrix.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.esteco.jira.pdf;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.PDPageContentStream.AppendMode;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.util.Matrix;

import java.io.IOException;

/**
 * This is an example of how to use a text matrix.
 */
public class UsingTextMatrix {
    /**
     * Constructor.
     */
    public UsingTextMatrix() {
        super();
    }

    /**
     * creates a sample document with some text using a text matrix.
     *
     * @param message The message to write in the file.
     * @param outfile The resulting PDF.
     * @throws IOException If there is an error writing the data.
     */
    public void doIt(String message, String outfile) throws IOException {
        // the document
        PDDocument doc = null;
        try {
            doc = new PDDocument();

            // Page 1
            PDFont font = PDType1Font.HELVETICA;
            PDPage page = new PDPage(PDRectangle.A4);
            doc.addPage(page);
            float fontSize = 12.0f;

            PDRectangle pageSize = page.getMediaBox();
            float centeredXPosition = (pageSize.getWidth() - fontSize / 1000f) / 2f;
            float stringWidth = font.getStringWidth(message);
            float centeredYPosition = (pageSize.getHeight() - (stringWidth * fontSize) / 1000f) / 3f;

            PDPageContentStream contentStream = new PDPageContentStream(doc, page, AppendMode.OVERWRITE, false);
            contentStream.setFont(font, fontSize);
            contentStream.beginText();
            // counterclockwise rotation
            for (int i = 0; i < 8; i++) {
                contentStream.setTextMatrix(Matrix.getRotateInstance(i * Math.PI * 0.25, centeredXPosition,
                        pageSize.getHeight() - centeredYPosition));
                contentStream.showText(message + " " + i);
            }
            // clockwise rotation
            for (int i = 0; i < 8; i++) {
                contentStream.setTextMatrix(
                        Matrix.getRotateInstance(-i * Math.PI * 0.25, centeredXPosition, centeredYPosition));
                contentStream.showText(message + " " + i);
            }

            contentStream.endText();
            contentStream.close();

            // Page 2
            page = new PDPage(PDRectangle.A4);
            doc.addPage(page);
            fontSize = 1.0f;

            contentStream = new PDPageContentStream(doc, page, AppendMode.OVERWRITE, false);
            contentStream.setFont(font, fontSize);
            contentStream.beginText();

            // text scaling and translation
            for (int i = 0; i < 10; i++) {
                contentStream.setTextMatrix(new Matrix(12 + (i * 6), 0, 0, 12 + (i * 6), 100, 100 + i * 50));
                contentStream.showText(message + " " + i);
            }
            contentStream.endText();
            contentStream.close();

            // Page 3
            page = new PDPage(PDRectangle.A4);
            doc.addPage(page);
            fontSize = 1.0f;

            contentStream = new PDPageContentStream(doc, page, AppendMode.OVERWRITE, false);
            contentStream.setFont(font, fontSize);
            contentStream.beginText();

            int i = 0;
            // text scaling combined with rotation
            contentStream.setTextMatrix(new Matrix(12, 0, 0, 12, centeredXPosition, centeredYPosition * 1.5f));
            contentStream.showText(message + " " + i++);

            contentStream.setTextMatrix(new Matrix(0, 18, -18, 0, centeredXPosition, centeredYPosition * 1.5f));
            contentStream.showText(message + " " + i++);

            contentStream.setTextMatrix(new Matrix(-24, 0, 0, -24, centeredXPosition, centeredYPosition * 1.5f));
            contentStream.showText(message + " " + i++);

            contentStream.setTextMatrix(new Matrix(0, -30, 30, 0, centeredXPosition, centeredYPosition * 1.5f));
            contentStream.showText(message + " " + i++);

            contentStream.endText();
            contentStream.close();

            doc.save(outfile);
        } finally {
            if (doc != null) {
                doc.close();
            }
        }
    }

    /**
     * This will create a PDF document with some examples how to use a text matrix.
     *
     * @param args Command line arguments.
     */
    public static void main(String[] args) throws IOException {
        UsingTextMatrix app = new UsingTextMatrix();
        app.doIt("Esteco", "d:/test.pdf");
    }

    /**
     * This will print out a message telling how to use this example.
     */
    private void usage() {
        System.err.println("usage: " + this.getClass().getName() + " <Message> <output-file>");
    }
}