> What do you think is the simplest way to draw a circle of a certain radius or diameter [...]? > I hoped for "addCircle" but didn't find that.
I found this example source code: https://svn.apache.org/viewvc/pdfbox/branches/2.0/examples/src/main/java/org/apache/pdfbox/examples/interactive/form/CreateRadioButtons.java?revision=1910171&view=co And it contains a small inconspicuous helper method "drawCircle", which actually solves the problem with only a few lines of code and without any additional dependencies! 😃 I've renamed and slightly altered it (closeAndStroke). Have a look at this runnable example code: /* * 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. */ import java.awt.Desktop; import java.io.File; import java.io.IOException; import java.nio.file.Files; import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.pdmodel.PDPage; import org.apache.pdfbox.pdmodel.PDPageContentStream; import org.apache.pdfbox.pdmodel.common.PDRectangle; public class CircleTest { public static void main( String[] args ) throws IOException { File outputFile = Files.createTempFile( "PDFCircleTest_", ".pdf" ).toFile(); try( PDDocument pdDocument = new PDDocument() ) { PDPage page = new PDPage( PDRectangle.A4 ); pdDocument.addPage( page ); try( PDPageContentStream cs = new PDPageContentStream( pdDocument, page ) ) { cs.setStrokingColor( 0 ); addCircle( cs, 200, 600, 80 ); } pdDocument.save( outputFile ); } Desktop.getDesktop().open( outputFile ); } // Taken and modified from source: // https://svn.apache.org/viewvc/pdfbox/branches/2.0/examples/src/main/java/org/apache/pdfbox/examples/interactive/form/CreateRadioButtons.java?view=markup private static void addCircle( PDPageContentStream cs, float x, float y, float r) throws IOException { // http://stackoverflow.com/a/2007782 float magic = r * 0.551784f; cs.moveTo(x, y + r); cs.curveTo(x + magic, y + r, x + r, y + magic, x + r, y); cs.curveTo(x + r, y - magic, x + magic, y - r, x, y - r); cs.curveTo(x - magic, y - r, x - r, y - magic, x - r, y); cs.curveTo(x - r, y + magic, x - magic, y + r, x, y + r); cs.closeAndStroke(); } } --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@pdfbox.apache.org For additional commands, e-mail: users-h...@pdfbox.apache.org
