PDFlib

高度なPDFアプリケーションの開発を支援する定番プログラムライブラリー Supported by インフォテック株式会社

PDFlib サンプル集(クックブック)

本サンプルプログラムは、PDF 文書生成ライブラリーの実装である PDFlib の基本的な機能を実際のプログラムで紹介したものです。

本サイトでダウンロードした PDFlib は、一部機能の制限を除き、評価版として無償でお使いいただけます。

複数ページにまたがるテーブルの作成

PDFlib では大きなテーブルを配置する際に、複数ページにまたがって配置することができます。

下記のサンプルプログラムでは、横 2 ページ、縦 3 ページにまたがる大きなテーブルを配置した PDF を作成します。


/*
 * Spread oversized table:
 * Output a table on 2 x m pages as it is needed to fit it completely.
 *
 * A table has a width which exceeds the width of the page. Therefore output
 * the table on a pair of pages with one page acting as the left and one page 
 * acting as the right page. Add pairs of pages until the table has been placed
 * completely.
 * Output each table instance twice with an appropriate clipping rectangle 
 * applied to the "left" or the "right" part, respectively. Use the "rewind"
 * option of fit_table() to rewind the table to the state before the fit_table()
 * call used to place the first table instance. Otherwise the table instance
 * could not be placed a second time. 
 * 
 * In Acrobat, display the table as follows:
 * Disable "View, Page Display, Show Cover Page in Two-Page View" if enabled.
 * Choose "View, Page Display, Two Page View" to display two pages next to each
 * other.  
 * 
 * Required software: PDFlib/PDFlib+PDI/PPS 9
 * Required data: font
 */
package com.pdflib.cookbook.pdflib.table;

import com.pdflib.pdflib;
import com.pdflib.PDFlibException;

public class spread_oversized_table
{
    public static void main (String argv[])
    {
    /* This is where the data files are. Adjust as necessary. */
    String searchpath = "../input";
    String outfile = "spread_oversized_table.pdf";
    String title = "Spread oversized Table";

    pdflib p = null;
    int exitcode = 0;
    
    int font, tbl = -1;
    
    int row, col;
    final int pagewidth=421, pageheight=595;
    
    /* Number of rows and columns contained in the table */
    final int rowmax=50, colmax=10;

    /* Inside, outside, upper and lower page margins */
    final double inside=10, outside=50, top=20, bottom=20;
    
    /* Table width and height */
    final double tablewidth=2*(pagewidth-outside-inside);
    final double tableheight=pageheight-bottom-top;
    
    final double lly=bottom, ury=pageheight-top;
       
    double llx, urx, widthright, widthleft;   
    double xmax = pagewidth-inside, xright = outside, x;
    double xshift;
    
    String headertext = "Table header (centered across all columns)";
    String result, optlist;
    int i;

    try {
        p = new pdflib();

        p.set_option("searchpath={" + searchpath + "}");

        /* This means we must check return values of load_font() etc. */
        p.set_option("errorpolicy=return");

        if (p.begin_document(outfile, "") == -1)
        throw new Exception("Error: " + p.get_errmsg());

        p.set_info("Creator", "PDFlib Cookbook");
        p.set_info("Title", title);
        

        /* ------------------- 
         * Add the table cells
         * -------------------
         */

        /* In row 1 add the table header which spans all columns
         */
        row = 1; col = 1;
        font = p.load_font("NotoSerif-Regular", "unicode", "");

        if (font == -1)
        throw new Exception("Error: " + p.get_errmsg());

        optlist = "fittextline={position=center font=" + font +
        " fontsize=14} " + "margin=2 colspan=" + colmax;

        tbl = p.add_table_cell(tbl, col, row, headertext, optlist);
        if (tbl == -1)
        throw new Exception("Error adding cell: " + p.get_errmsg());


        /* In row 2 and above add the respective column and row numbers */
        for (row++; row <= rowmax; row++) {
        for (col = 1; col <= colmax; col++)
        {
            String num;

            num = "Col " + col + "/Row " + row;
            optlist = "fittextline={font=" + font + " fontsize=10} " +
            "margin=2";
            
            tbl = p.add_table_cell(tbl, col, row, num, optlist);
            if (tbl == -1)
            throw new Exception("Error adding cell: " +
            p.get_errmsg());
        }
        }
        
        /* Option list for fitting the table: 
         * define the first line as the header line;
         * shade every other row; draw lines for all table cells
         */
        optlist = "header=1 fill={{area=rowodd fillcolor={gray 0.9}}} " +
        "stroke={{line=other}} ";
        
            
        /* --------------------------------------------------------------------
         * Check if the table width fits completely on the page or if the table
         * width has to distributed over two pages, i.e. the left and the right
         * page
         * --------------------------------------------------------------------
         */

        /* Place the first table instance over both pages in blind mode. All
         * calculations will be done but the table will not actually be placed.
         * Then, retrieve the number of the last column (i.e. the vertical line)
         * which still fits on the "left" page. 
         */
        p.begin_page_ext(pagewidth, pageheight, "");
        
        llx = outside;
        urx = llx+tablewidth;
        result = p.fit_table(tbl, llx, lly, urx, ury, optlist + "blind");

        if (result.equals("_error") || result.equals("_boxempty"))
        throw new Exception ("Couldn't place table: " + p.get_errmsg());
        
        /* Query the x coordinate "xright" of the last column which fits in the
         * fitbox on the "left" page
         */
        for (i = 1; i <= colmax; i++)
        {
        /* Get the x coordinate of the vertical line with number #. 
         * "xvertline0" is the left table border.
         */ 
        x = p.info_table(tbl, "xvertline" + i);  
        if (x > xmax) {
            break;
        }
        xright = x;
        }
      
        /* -------------------------------------------------------------
         * Place the first half of the table instance on the "left" page
         * -------------------------------------------------------------
         */
        
        /* Since the table will be clipped on the right the inner margin of the
         * left page may be increased. Use the "xshift" value to shift the table
         * to the right so that the inner margin will become the default value
         * again.
        */
        xshift = pagewidth - xright - inside;
        
        /* Using the x coordinate of the last column fitting on the "left" page
         * set the clipping rectangle for the first columns of the table which 
         * will be placed on the left page.
         */
        llx = outside + xshift;
        widthleft = xright - outside;
        p.rect(llx, lly, widthleft, tableheight);
        p.clip();
        
        /* Place the table instance on the "left" page. 
         * Use the "rewind" option to rewind the table to the state before
         * the last fit_table() call (which just happened in "blind" mode for 
         * calculation purposes).
         * The table instance will be placed with the complete table width but
         * it will be clipped according to the clipping rectangle to show only
         * the first "xright" columns.
         */
        llx = outside + xshift;
        urx = llx + tablewidth;
        result = p.fit_table(tbl, llx, lly, urx, ury, optlist + " rewind=-1");

        if (result.equals("_error"))
        throw new Exception ("Couldn't place table : " + p.get_errmsg());
        
        p.end_page_ext("");
        
        /* ---------------------------------------------------------------
         * Place the second half of the table instance on the "right" page
         * ---------------------------------------------------------------
         */
         
        p.begin_page_ext(pagewidth, pageheight, "");
        
        /* Set the clipping rectangle for all further columns of the table which
         * will be placed on the "right" page
         */
        llx = inside;
        widthright = tablewidth-widthleft; 
        p.rect(llx, lly, widthright, tableheight);
        p.clip();
        
        /* Place the table instance again on the "right" page. 
         * Use the "rewind" option to rewind the table to the state before
         * the last fit_table() call (which has been used to place the first 
         * table instance). Otherwise this instance could not be placed a second
         * time.
         * The fitbox of the table instance is shifted to the left "outside"
         * the page so that the last columns can be shown on the page.
         * The table instance will be placed with the complete table width but
         * it will be clipped according to the clipping rectangle to show only
         * the last columns. 
         */ 
        llx = llx-widthleft;
        urx = inside+widthright;
        result = p.fit_table(tbl, llx, lly, urx, ury, optlist + " rewind=-1");

        if (result.equals("_error"))
        throw new Exception ("Couldn't place table : " + p.get_errmsg());

        p.end_page_ext("");
        
        
        /* ---------------------------------------------------------------
         * Place all further table instances on a left and right page each
         * ---------------------------------------------------------------
         */ 
        
        /* Loop until all of the table is placed; create new pages as long as
         * more table instances need to be placed.
         */
        while (result.equals("_boxfull"))
        {
        p.begin_page_ext(pagewidth, pageheight, "");
        
        /* Set the clipping rectangle to place the first columns of the 
         * table on the left page
         */
        llx = outside + xshift;
        widthleft = xright-outside;
        p.rect(llx, lly, widthleft, tableheight);
        p.clip();
        
        /* Place the table instance on the "left" page */ 
        urx = llx+tablewidth;
        result = p.fit_table(tbl, llx, lly, urx, ury, optlist);

        if (result.equals("_error"))
            throw new Exception ("Couldn't place table : " + p.get_errmsg());
        
        p.end_page_ext("");
        
        p.begin_page_ext(pagewidth, pageheight, "");
        
        /* Set the clipping rectangle to place all further columns of the 
         * table on the right page
         */
        llx = inside;
        widthright = tablewidth-widthleft; 
        p.rect(llx, lly, widthright, tableheight);
        p.clip();
        
        /* Place the table instance again on the "right" page */ 
        llx = llx-widthleft;
        urx = inside+widthright;
        result = p.fit_table(tbl, llx, lly, urx, ury, 
            optlist + " rewind=-1");

        if (result.equals("_error"))
            throw new Exception ("Couldn't place table : " + p.get_errmsg());
        
        p.end_page_ext("");
        }
        
        /* Check the result; "_stop" means all is ok */
        if (!result.equals("_stop")) {
        if (result.equals( "_error"))
            throw new Exception ("Error when placing table: " +
            p.get_errmsg());
        else
            /* Any other return value is a user exit caused by the "return" 
             * option; this requires dedicated code to deal with.
             */
            throw new Exception ("User return found in Textflow");
        }

        /* This will also delete Textflow handles used in the table */
        p.delete_table(tbl, "");
        
        p.end_document("");

        } catch (PDFlibException e) {
            System.err.println("PDFlib exception occurred:");
            System.err.println("[" + e.get_errnum() + "] " + e.get_apiname() +
                ": " + e.get_errmsg());
        exitcode = 1;
        } catch (Exception e) {
            System.err.println(e.toString());
        exitcode = 1;
        } finally {
            if (p != null) {
                p.delete();
            }
        System.exit(exitcode);
        }
    }
}
(Sep 18, 2013 - May 23, 2019)