Java tutorial
/** * Copyright (c) 2001-2002. Department of Family Medicine, McMaster University. All Rights Reserved. * This software is published under the GPL GNU General Public License. * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * This software was written for the * Department of Family Medicine * McMaster University * Hamilton * Ontario, Canada */ /* * PreventionPrintPdf.java * * Created on March 12, 2007, 4:05 PM * * To change this template, choose Tools | Template Manager * and open the template in the editor. */ package oscar.oscarPrevention.pageUtil; import java.awt.Color; import java.io.IOException; import java.io.OutputStream; import java.util.Properties; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import oscar.OscarProperties; import oscar.oscarClinic.ClinicData; import com.lowagie.text.Document; import com.lowagie.text.DocumentException; import com.lowagie.text.Font; import com.lowagie.text.HeaderFooter; import com.lowagie.text.PageSize; import com.lowagie.text.Phrase; import com.lowagie.text.pdf.BaseFont; import com.lowagie.text.pdf.ColumnText; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfWriter; /** * * @author rjonasz */ public class PreventionPrintPdf { private int numLines; private int maxLines; private int totalLinesWritten; private int linesToBeWritten; private int linesWritten; private int numPages; private int curPage; private float upperYcoord; private float pageHeight; private ColumnText ct; private Document document; private PdfContentByte cb; private final int LINESPACING = 1; private final float LEADING = 12; private final float FONTSIZE = 12; private final int NUMCOLS = 2; /** Creates a new instance of PreventionPrintPdf */ public PreventionPrintPdf() { } public void printPdf(HttpServletRequest request, HttpServletResponse response) throws IOException, DocumentException { response.setContentType("application/pdf"); //octet-stream response.setHeader("Content-Disposition", "attachment; filename=\"Prevention.pdf\""); String[] headerIds = request.getParameterValues("printHP"); printPdf(headerIds, request, response.getOutputStream()); } public void printPdf(String[] headerIds, HttpServletRequest request, OutputStream outputStream) throws IOException, DocumentException { //make sure we have data to print //String[] headerIds = request.getParameterValues("printHP"); if (headerIds == null) throw new DocumentException(); //Create the document we are going to write to document = new Document(); PdfWriter writer = PdfWriter.getInstance(document, outputStream); document.setPageSize(PageSize.LETTER); document.open(); //Create the font we are going to print to BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED); Font font = new Font(bf, FONTSIZE, Font.NORMAL); float leading = font.getCalculatedLeading(LINESPACING); //set up document title and header String title = "Preventions for " + request.getParameter("nameAge"); String hin = "HIN: " + request.getParameter("hin"); String mrp = request.getParameter("mrp"); if (mrp != null) { Properties prop = (Properties) request.getSession().getAttribute("providerBean"); mrp = "MRP: " + prop.getProperty(mrp, "unknown"); } ClinicData clinicData = new ClinicData(); clinicData.refreshClinicData(); String[] clinic = new String[] { clinicData.getClinicName(), clinicData.getClinicAddress(), clinicData.getClinicCity() + ", " + clinicData.getClinicProvince(), clinicData.getClinicPostal(), clinicData.getClinicPhone(), title, hin, mrp }; //Header will be printed at top of every page beginning with p2 Phrase headerPhrase = new Phrase(LEADING, title, font); HeaderFooter header = new HeaderFooter(headerPhrase, false); header.setAlignment(HeaderFooter.ALIGN_CENTER); document.setHeader(header); //Write title with top and bottom borders on p1 cb = writer.getDirectContent(); cb.setColorStroke(new Color(0, 0, 0)); cb.setLineWidth(0.5f); cb.moveTo(document.left(), document.top()); cb.lineTo(document.right(), document.top()); cb.stroke(); cb.setFontAndSize(bf, FONTSIZE); upperYcoord = document.top() - (font.getCalculatedLeading(LINESPACING) * 2f); cb.beginText(); for (int idx = 0; idx < clinic.length; ++idx) { cb.showTextAligned(PdfContentByte.ALIGN_CENTER, clinic[idx], document.right() / 2f, upperYcoord, 0f); upperYcoord -= font.getCalculatedLeading(LINESPACING); } cb.endText(); cb.moveTo(document.left(), upperYcoord); cb.lineTo(document.right(), upperYcoord); cb.stroke(); //get top y-coord for starting to print columns upperYcoord = cb.getYTLM() - font.getCalculatedLeading(LINESPACING * 2f); int subIdx; String preventionHeader, procedureAge, procedureDate; //1 - obtain number of lines of incoming prevention data numLines = 0; for (int idx = 0; idx < headerIds.length; ++idx) { ++numLines; subIdx = 0; while (request.getParameter("preventProcedureAge" + headerIds[idx] + "-" + subIdx) != null) { ++subIdx; numLines += 3; } numLines += 2; } //2 - calculate max num of lines a page can hold and number of pages of data we have pageHeight = upperYcoord - document.bottom(); maxLines = (int) Math.floor(pageHeight / (font.getCalculatedLeading(LINESPACING) + 4d)); numPages = (int) Math.ceil(numLines / ((double) maxLines * NUMCOLS)); //3 - Start the column ct = new ColumnText(cb); ct.setSimpleColumn(document.left(), document.bottom(), document.right() / 2f, upperYcoord); linesToBeWritten = linesWritten = 0; boolean pageBreak = false; curPage = 1; totalLinesWritten = 0; //add promotext to current page addPromoText(); //if we have > 1 element but less than a page of data, shrink maxLines so we can try to balance text in columns if (headerIds.length > 1) { if (curPage == numPages) { maxLines = numLines / NUMCOLS; } } //now we can start to print the prevention data for (int idx = 0; idx < headerIds.length; ++idx) { linesToBeWritten = 4; //minimum lines for header and one prevention item pageBreak = checkColumnFill(ct, "", font, pageBreak); //if necessary break before we print prevention header preventionHeader = request.getParameter("preventionHeader" + headerIds[idx]); Phrase procHeader = new Phrase(LEADING, "Prevention " + preventionHeader + "\n", font); ct.addText(procHeader); subIdx = 0; while ((procedureAge = request .getParameter("preventProcedureAge" + headerIds[idx] + "-" + subIdx)) != null) { procedureDate = request.getParameter("preventProcedureDate" + headerIds[idx] + "-" + subIdx); linesToBeWritten = 3; pageBreak = checkColumnFill(ct, preventionHeader, font, pageBreak); Phrase procedure = new Phrase(LEADING, " " + procedureAge + "\n", font); procedure.add(" " + procedureDate + "\n\n"); ct.addText(procedure); ct.go(); linesWritten += ct.getLinesWritten(); totalLinesWritten += ct.getLinesWritten(); ++subIdx; } } ColumnText.showTextAligned(cb, Phrase.ALIGN_CENTER, new Phrase("-" + curPage + "-"), document.right() / 2f, document.bottom() - (document.bottomMargin() / 2f), 0f); document.close(); } private boolean breakPage(boolean pageBreak, float upperYcoord) { if (pageBreak) { ColumnText.showTextAligned(cb, Phrase.ALIGN_CENTER, new Phrase("-" + curPage + "-"), document.right() / 2f, document.bottom() - (document.bottomMargin() / 2f), 0f); ++curPage; try { document.newPage(); // add promo text to new page addPromoText(); } catch (Exception e) { } if (curPage == numPages) { maxLines = (numLines - totalLinesWritten) / NUMCOLS; } ct.setSimpleColumn(document.left(), document.bottom(), document.right() / 2f, upperYcoord); pageBreak = false; } else { ct.setSimpleColumn(document.right() / 2f, document.bottom(), document.right(), upperYcoord); pageBreak = true; } return pageBreak; } private boolean checkColumnFill(ColumnText ct, String preventionHeader, Font font, boolean pageBreak) { if (linesWritten + linesToBeWritten > maxLines) { //reset upperYcoord for pages 2 and above if (curPage == 1 && pageBreak) { upperYcoord = document.top() - font.getCalculatedLeading(LINESPACING); pageHeight = upperYcoord - document.bottom(); maxLines = (int) Math.floor(pageHeight / (font.getCalculatedLeading(LINESPACING) + 4d)); numPages = (int) Math.ceil(((double) numLines - totalLinesWritten) / ((double) maxLines * NUMCOLS)) + 1; } pageBreak = breakPage(pageBreak, upperYcoord); linesWritten = 0; if (preventionHeader.length() > 0) { Phrase procHeaderContd = new Phrase(LEADING, "Prevention " + preventionHeader + " cont'd\n", font); ct.addText(procHeaderContd); ++linesToBeWritten; } } return pageBreak; } private void addPromoText() throws DocumentException, IOException { if (OscarProperties.getInstance().getProperty("FORMS_PROMOTEXT") != null) { cb.beginText(); cb.setFontAndSize(BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED), 6); cb.showTextAligned(PdfContentByte.ALIGN_CENTER, OscarProperties.getInstance().getProperty("FORMS_PROMOTEXT"), PageSize.LETTER.getWidth() / 2, 5, 0); cb.endText(); } } }