<?php
/*
 * Form listbox:
 * Create a form field of type "listbox" for choosing an item from a list.
 * 
 * Required software: PDFlib/PDFlib+PDI/PPS 10
 * Required data: none
 */

/* This is where the data files are. Adjust as necessary */
$searchpath = dirname(__FILE__,3)."/input";
$outfile = "";
$title = "Form Listbox";

$width=150; $height=83; $llx = 100; $lly = 600;

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, "") == 0)
        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 == 0)
        throw new Exception("Error: " . $p->get_errmsg());
    
    /* Start page */
    $p->begin_page_ext(0, 0, " width=a4.width height=a4.height");
    
    /* Output a listbox title */
    $p->setfont($font, 14);
    $p->fit_textline("Choose a paper plane model:", $llx, $lly, "");
    $lly-=90;
    
    /* Create a form fields of type "listbox".
     * Provide the box with a light gray background
     * (backgroundcolor={gray 0.9}) and a gray border
     * (bordercolor={gray 0.7}).
     * Set the values for the list items (itemnamelist={0 1 2 3}).
     * Set the labels for the list items (itemtextlist={...}).
     * Set the focus on the first item (currentvalue=0).
     */
    $optlist = "font=" . $font . " fontsize=14 backgroundcolor={gray 0.9} " .
        "bordercolor={gray 0.7} itemnamelist={0 1 2 3} currentvalue=0 " .
        "itemtextlist={{Long Distance Glider} {Giant Wing} {Cone Head " .
        "Rocket} {Super Dart}}";
    
    $p->create_field($llx, $lly, $llx + $width, $lly + $height, "plane", "listbox",
        $optlist);
    
    $p->end_page_ext("");
    $p->end_document("");

    $buf = $p->get_buffer();
    $len = strlen($buf);

    header("Content-type: application/pdf");
    header("Content-Length: $len");
    header("Content-Disposition: inline; filename=form_listbox.pdf");
    print $buf;

} catch (PDFlibException $e) {
    echo("PDFlib exception occurred:\n".
        "[" . $e->get_errnum() . "] " . $e->get_apiname() .
        ": " . $e->get_errmsg() . "\n");
    exit(1);
} catch (Throwable $e) {
    echo("PHP exception occurred: " . $e->getMessage() . "\n");
    exit(1);
}

$p = 0;

?>