Java tutorial
/* Copyright 2008-2010 Gephi Authors : Jeremy Subtil <jeremy.subtil@gephi.org>, Mathieu Bastian <mathieu.bastian@gephi.org> Website : http://www.gephi.org This file is part of Gephi. DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. Copyright 2011 Gephi Consortium. All rights reserved. The contents of this file are subject to the terms of either the GNU General Public License Version 3 only ("GPL") or the Common Development and Distribution License("CDDL") (collectively, the "License"). You may not use this file except in compliance with the License. You can obtain a copy of the License at http://gephi.org/about/legal/license-notice/ or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the specific language governing permissions and limitations under the License. When distributing the software, include this License Header Notice in each file and include the License files at /cddl-1.0.txt and /gpl-3.0.txt. 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Contributor(s): Portions Copyrighted 2011 Gephi Consortium. */ package org.gephi.io.exporter.preview; import com.itextpdf.text.BaseColor; import com.itextpdf.text.Document; import com.itextpdf.text.DocumentException; import com.itextpdf.text.FontFactory; import com.itextpdf.text.PageSize; import com.itextpdf.text.Rectangle; import com.itextpdf.text.pdf.PdfContentByte; import com.itextpdf.text.pdf.PdfWriter; import java.awt.Color; import java.io.OutputStream; import org.gephi.io.exporter.spi.ByteExporter; import org.gephi.io.exporter.spi.VectorExporter; import org.gephi.preview.api.PDFTarget; import org.gephi.preview.api.PreviewController; import org.gephi.preview.api.PreviewProperties; import org.gephi.preview.api.PreviewProperty; import org.gephi.preview.api.RenderTarget; import org.gephi.utils.longtask.spi.LongTask; import org.gephi.utils.progress.Progress; import org.gephi.utils.progress.ProgressTicket; import org.gephi.project.api.Workspace; import org.openide.util.Exceptions; import org.openide.util.Lookup; /** * Class exporting the preview graph as a PDF file. * * @author Jrmy Subtil <jeremy.subtil@gephi.org> * @author Mathieu Bastian */ public class PDFExporter implements ByteExporter, VectorExporter, LongTask { private ProgressTicket progress; private Workspace workspace; private OutputStream stream; private boolean cancel = false; private PDFTarget target; //Parameters private float marginTop = 18f; private float marginBottom = 18f; private float marginLeft = 18f; private float marginRight = 18f; private boolean landscape = false; private Rectangle pageSize = PageSize.A4; public boolean execute() { Progress.start(progress); PreviewController controller = Lookup.getDefault().lookup(PreviewController.class); controller.getModel(workspace).getProperties().putValue(PreviewProperty.VISIBILITY_RATIO, 1.0); controller.refreshPreview(workspace); PreviewProperties props = controller.getModel(workspace).getProperties(); Rectangle size = new Rectangle(pageSize); if (landscape) { size = new Rectangle(pageSize.rotate()); } Color col = props.getColorValue(PreviewProperty.BACKGROUND_COLOR); size.setBackgroundColor(new BaseColor(col.getRed(), col.getGreen(), col.getBlue())); Document document = new Document(size); PdfWriter pdfWriter = null; try { pdfWriter = PdfWriter.getInstance(document, stream); pdfWriter.setPdfVersion(PdfWriter.PDF_VERSION_1_5); pdfWriter.setFullCompression(); } catch (DocumentException ex) { Exceptions.printStackTrace(ex); } document.open(); PdfContentByte cb = pdfWriter.getDirectContent(); cb.saveState(); props.putValue(PDFTarget.LANDSCAPE, landscape); props.putValue(PDFTarget.PAGESIZE, size); props.putValue(PDFTarget.MARGIN_TOP, new Float((float) marginTop)); props.putValue(PDFTarget.MARGIN_LEFT, new Float((float) marginLeft)); props.putValue(PDFTarget.MARGIN_BOTTOM, new Float((float) marginBottom)); props.putValue(PDFTarget.MARGIN_RIGHT, new Float((float) marginRight)); props.putValue(PDFTarget.PDF_CONTENT_BYTE, cb); target = (PDFTarget) controller.getRenderTarget(RenderTarget.PDF_TARGET, workspace); if (target instanceof LongTask) { ((LongTask) target).setProgressTicket(progress); } try { controller.render(target, workspace); } catch (Exception e) { throw new RuntimeException(e); } cb.restoreState(); document.close(); Progress.finish(progress); props.putValue(PDFTarget.PDF_CONTENT_BYTE, null); props.putValue(PDFTarget.PAGESIZE, null); return !cancel; } public boolean isLandscape() { return landscape; } public float getMarginBottom() { return marginBottom; } public float getMarginLeft() { return marginLeft; } public float getMarginRight() { return marginRight; } public float getMarginTop() { return marginTop; } public Rectangle getPageSize() { return pageSize; } public void setMarginBottom(float marginBottom) { this.marginBottom = marginBottom; } public void setMarginLeft(float marginLeft) { this.marginLeft = marginLeft; } public void setMarginRight(float marginRight) { this.marginRight = marginRight; } public void setMarginTop(float marginTop) { this.marginTop = marginTop; } public void setPageSize(Rectangle pageSize) { this.pageSize = pageSize; } public void setOutputStream(OutputStream stream) { this.stream = stream; } public void setWorkspace(Workspace workspace) { this.workspace = workspace; } public void setLandscape(boolean landscape) { this.landscape = landscape; } public Workspace getWorkspace() { return workspace; } public boolean cancel() { this.cancel = true; if (target instanceof LongTask) { ((LongTask) target).cancel(); } return true; } public void setProgressTicket(ProgressTicket progressTicket) { this.progress = progressTicket; } }