form_fields/form_textfield_fill_with_js
Fill a form text field with a value using JavaScript.
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/*
* 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 10
* Required data: none
*/
package com.pdflib.cookbook.pdflib.form_fields;
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;
int exitcode = 0;
String optlist;
int 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);
font = p.load_font("NotoSerif-Regular", "winansi",
"simplefont nosubsetting");
if (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. "Apr 15 2020".
*/
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={lightblue} bordercolor={gray 0} " +
"maxchar=11 scrollable=false font=" + font + " fontsize=18";
p.create_field(llx, lly, llx + width, lly + height, "date", "textfield",
optlist);
lly-=40;
p.fit_textline("When opening the page the current date is " +
"automatically displayed in the field.", llx, lly,
"fontname=NotoSerif-Regular fontsize=12");
p.end_page_ext("");
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);
exitcode = 1;
} finally {
if (p != null) {
p.delete();
}
System.exit(exitcode);
}
}
}