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text_output/wrap_text_around_polygons

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/* $Id: wrap_text_around_polygons.java,v 1.4 2013/01/15 10:12:08 stm Exp $

 * Wrap text around polygons:

 * Use arbitrary polygons as wrapping shapes for text to wrap around

 *

 * Use fit_textflow() with the "wrap" option and the "polygons" suboption to

 * wrap text around a triangle positioned relative to the fitbox of the

 * Textflow. Then wrap text around two hexagons positioned with absolute

 * coordinates on the page.

 *

 * Required software: PDFlib/PDFlib+PDI/PPS 9

 * Required data: none

 */

package com.pdflib.cookbook.pdflib.text_output;


import com.pdflib.pdflib;

import com.pdflib.PDFlibException;


public class wrap_text_around_polygons

{

    public static void main (String argv[])

    {

    pdflib p = null;

    String searchpath = "../input";

    String outfile = "wrap_text_around_polygons.pdf";

    String title = "Wrap Text around Polygons";

   

    int i, tf = -1;

    String result, heading;

    final double llx = 70, lly = 50, urx = 450, ury = 820;



    /* Repeat the dummy text to produce more contents */

    final int count = 6;


    final String optlist1 =

        "fontname=Helvetica fontsize=10.5 encoding=unicode " +

        "fillcolor={gray 0} alignment=justify";


    final String optlist2 =

        "fontname=Helvetica-Bold fontsize=11 encoding=unicode " +

        "fillcolor={rgb 0 0 1} charref";


    /* Text which is repeatedly placed on the page. Soft hyphens are marked

     * with the character reference "­" (character references are enabled

     * by the charref option).

     */

    final String text =

        "Our paper planes are the ideal way of passing the time. We offer " +

        "revolutionary new develop­ments of the traditional common paper " +

        "planes. If your lesson, conference, or lecture turn out to be " +

        "deadly boring, you can have a wonderful time with our planes. " +

        "All our models are fol­ded from one paper sheet. They are " +

        "exclu­sively folded with­out using any adhesive. Several " +

        "models are equipped with a folded landing gear enabling a safe " +

        "landing on the intended loca­tion provided that you have aimed " +

        "well. Other models are able to fly loops or cover long distances. " +

        "Let them start from a vista point in the mountains and see where " +

        "they touch the ground. ";

   

    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");

        p.set_option("charref=true");


        if (p.begin_document(outfile, "") == -1)

            throw new Exception("Error: " + p.get_errmsg());


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

        p.set_info("Title", title + " $Revision: 1.4 $");

       

       

        /* ---------------------------

         * Wrap text around a triangle

         * ---------------------------

         */

       

        /* Create a heading */

        heading = "Page 1: fit_textflow() with option\n" +

            "wrap={polygons={{50% 80%   20% 30%   80% 30%   50% 80%}}}\n\n";

       

        tf = p.add_textflow(tf, heading, optlist2);

        if (tf == -1)

            throw new Exception("Error: " + p.get_errmsg());


        /* Create some amount of dummy text and feed it to a Textflow object

         * with alternating options

         */

        for (i=1; i<=count; i++) {

            String num = i + " ";


            tf = p.add_textflow(tf, num, optlist2);

            if (tf == -1)

                throw new Exception("Error: " + p.get_errmsg());


            tf = p.add_textflow(tf, text, optlist1);

            if (tf == -1)

                throw new Exception("Error: " + p.get_errmsg());

        }


        /* Loop until all of the text is placed; create new pages

         * as long as more text needs to be placed.

         */

        do {

            p.begin_page_ext(0, 0, "width=a4.width height=a4.height");

     

            /* Place the text. Use the "wrap" option with the "polygons"

             * suboption to define a triangle. In this case, each corner of the

             * triangle is specified by a pair of coordinates defined as

             * percentage of the fitbox width or height, respectively.

             */

            result = p.fit_textflow(tf, llx, lly, urx, ury,

                "verticalalign=justify linespreadlimit=120% " +

                "wrap={ polygons={ {50% 80%   20% 30%   80% 30%   50% 80%} } }");


            p.end_page_ext("");


            /* "_boxfull" means we must continue because there is more text;

             * "_nextpage" is interpreted as "start new column"

             */

        } while (result.equals("_boxfull") || result.equals("_nextpage"));


        /* Check for errors */

        if (!result.equals("_stop"))

        {

            /* "_boxempty" happens if the box is very small and doesn't

             * hold any text at all.

             */

            if (result.equals( "_boxempty"))

                throw new Exception ("Error: Textflow box too small");

            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 '" + result +

                        "' found in Textflow");

            }

        }

        p.delete_textflow(tf);

       

       

        /* -----------------------------

         * Wrap text around two hexagons

         * -----------------------------

         */

        tf = -1;

       

        /* Create a heading */

        heading = "Page 2: fit_textflow() with option " +

            "wrap={ polygons={\n{150 250   200 350   300 350   350 250   " +

            "300 150   200 150   150 250}\n{130 550   200 650   300 650   " +

            "370 550   300 450   200 450   130 550}}}\n\n";

       

        tf = p.add_textflow(tf, heading, optlist2);

        if (tf == -1)

            throw new Exception("Error: " + p.get_errmsg());


        /* Create some amount of dummy text and feed it to a Textflow object

         * with alternating options

         */

        for (i=1; i<=count; i++) {

            String num = i + " ";


            tf = p.add_textflow(tf, num, optlist2);

            if (tf == -1)

                throw new Exception("Error: " + p.get_errmsg());


            tf = p.add_textflow(tf, text, optlist1);

            if (tf == -1)

                throw new Exception("Error: " + p.get_errmsg());

        }


        /* Loop until all of the text is placed; create new pages

         * as long as more text needs to be placed.

         */

        do {

            p.begin_page_ext(0, 0, "width=a4.width height=a4.height");

     

            /* Place the text. Use the "wrap" option with the "polygons"

             * suboption to define two hexagons. In this case, each corner of

             * the hexagons is specified by a pair of absolute coordinates on

             * the page.

             */

            result = p.fit_textflow(tf, llx, lly, urx, ury,

                "verticalalign=justify linespreadlimit=120% wrap={ polygons={" +

    "{150 250   200 350   300 350   350 250   300 150   200 150   150 250}   " +

    "{130 550   200 650   300 650   370 550   300 450   200 450   130 550}} }");


            p.end_page_ext("");


            /* "_boxfull" means we must continue because there is more text;

             * "_nextpage" is interpreted as "start new column"

             */

        } while (result.equals("_boxfull") || result.equals("_nextpage"));


        /* Check for errors */

        if (!result.equals("_stop"))

        {

            /* "_boxempty" happens if the box is very small and doesn't

             * hold any text at all.

             */

            if (result.equals( "_boxempty"))

                throw new Exception ("Error: Textflow box too small");

            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 '" + result +

                        "' found in Textflow");

            }

        }

        p.delete_textflow(tf);


        p.end_document("");


        } catch (PDFlibException e) {

            System.err.print("PDFlib exception occurred:\n");

            System.err.print("[" + e.get_errnum() + "] " + e.get_apiname() +

                ": " + e.get_errmsg() + "\n");

        } catch (Exception e) {

            System.err.println(e.getMessage());

        } finally {

            if (p != null) {

                p.delete();

            }

        }

    }

}