interactive/form_tab_order

 * Form tab order:

 * Define the position of each form field in the tab order, i.e. when the user

 * presses the "Tab" key.

 *

 * By default the tab order of fields will be implicitly defined according to

 * their creation order. Using the "taborder" option another tab order can

 * be defined. Create a matrix of text fields row by row but define the tab

 * order column by column.

 *

 * Required software: PDFlib/PDFlib+PDI/PPS 7

 * Required data: none

 */

package com.pdflib.cookbook.pdflib.interactive;

import com.pdflib.pdflib;

import com.pdflib.PDFlibException;

public class form_tab_order

{

    public static void main (String argv[])

    {

    /* This is where the data files are. Adjust as necessary */

    String searchpath = "../input";

    String outfile = "form_tab_order.pdf";

    String title = "Form Tab Order";

    pdflib p = null;

    String optlist;

    int font, i, j, tab;

    double width=130, height=30, llx = 10, lly = 600;

    try {

        p = new pdflib();

        /* This means we must check return values of load_font() etc. */

        p.set_parameter("errorpolicy", "return");

        p.set_parameter("SearchPath", searchpath);

        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: 1.3 $");

        font = p.load_font("Helvetica", "winansi", "");

        if (font == -1)

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

        /* Start page */

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

        p.setfont(font, 14);

        p.fit_textline("Press \"Tab\" to move from one field to the next in " +

            "the tab order defined.", llx, lly, "");

        /* Create a matrix of text fields row by row but define the tab order

         * column by column (taborder=...). Each text fields show its position

         * in the tab order (currentvalue={...}).

         */

        optlist = "backgroundcolor={rgb 0.95 1 0.95} bordercolor={gray 0} " +

            "alignment=center font=" + font + " fontsize=18";

        lly-= 50;

        for (i = 1; i <= 3; i++) {

            for (j = 1, tab=i; j <= 3; j++, tab+=3) {

                p.create_field(llx, lly, llx + width, lly + height,

                    "field" + tab, "textfield", optlist + " taborder=" + tab +

                    " currentvalue={tab position " + tab + "}");

                llx+=width + 20;

            }

            llx = 10;

            lly -= height + 30;

        }

        p.end_page_ext("");

        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();

            }

        }

    }

}