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interactive/form_textfield_fill_with_js

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/* $Id: form_textfield_fill_with_js.java,v 1.8 2013/01/15 10:12:00 stm Exp $
 * Form text field filling with JavaScript:
 * Fill a form text field with a value using JavaScript
 *
 * Create a text field for displaying a date. Using a JavaScript action display
 * the current date in the form field whenever the page is opened.
 *
 * Required software: PDFlib/PDFlib+PDI/PPS 9
 * Required data: none
 */
package com.pdflib.cookbook.pdflib.interactive;

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

public class form_textfield_fill_with_js
{
    public static void main (String argv[])
    {
    /* This is where the data files are. Adjust as necessary */
    String searchpath = "../input";
    String outfile = "form_textfield_fill_with_js.pdf";
    String title = "Form Text Field Filling with JavaScript";

    pdflib p = null;

    String optlist;
    int font, monospaced_font;
    double width=160, height=30, llx = 10, lly = 700;

    try {
        p = new pdflib();

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

        p.set_option("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: 1.8 $");

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

        monospaced_font = p.load_font("Courier", "winansi", "");
        if (monospaced_font == -1)
            throw new Exception("Error: " + p.get_errmsg());


        /* --------------------------------------------------------------------
         * Define a JavaScript script for entering the current date in the form
         * field "date" and supply it as the open action when starting the page
         * --------------------------------------------------------------------
         *
         * First create an action of type JavaScript. With the "script" option
         * in the option list of the action define a JavaScript snippet which
         * displays the current date in the "date" text field in the format
         * "mm dd yyyy", e.g. "Sep 11 2007".
         */
        optlist = "script={var d = util.printd('mmm dd yyyy', new Date());\n" +
            "var date = this.getField('date');\ndate.value = d;}";

        int show_date = p.create_action("JavaScript", optlist);

        /* In the second step create the page. In the option list supply
         * the "action" option which attaches the "show_date" action created
         * above to the page open event.
         */
        p.begin_page_ext(0, 0, "width=a4.width height=a4.height action={open " +
            show_date + "}");

        /* ---------------------------------
         * Create the form text field "date"
         * ---------------------------------
         *
         * Create a form field of type "textfield" called "date" with a
         * background color of light blue and a black border.
         * Allow a maximum of 11 characters to be entered (maxchar=11).
         * The characters are not moved out of the field if the field size is
         * reached (scrollable=false).
         * Display equidistant subfields for each character (comb=true).
         */
        optlist = "backgroundcolor={rgb 0.95 0.95 1} bordercolor={gray 0} " +
            "maxchar=11 scrollable=false comb=true font=" + monospaced_font +
            " fontsize=18";

        p.create_field(llx, lly, llx + width, lly + height, "date", "textfield",
            optlist);
        lly-=40;

        p.setfont(font, 12);
        p.fit_textline("When opening the page the current date is " +
            "automatically displayed in the field.", llx, lly, "");

        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();
            }
        }
    }
}