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1<?php
2
3declare(strict_types=1);
4
5namespace Phpdftk\Pdf\Core\Interactive\Form;
6
7use Phpdftk\Pdf\Core\PdfArray;
8use Phpdftk\Pdf\Core\PdfName;
9use Phpdftk\Pdf\Core\PdfNumber;
10use Phpdftk\Pdf\Core\PdfVersion;
11use Phpdftk\Pdf\Core\RequiresPdfVersion;
12
13/**
14 * Choice field (/FT /Ch) - covers list boxes and combo boxes.
15 */
16#[RequiresPdfVersion(PdfVersion::V1_2)]
17class ChoiceField extends Field
18{
19    public ?PdfArray $opt = null;  // /Opt - options
20    public ?int $ti = null;        // /TI - top index
21    public ?PdfArray $i = null;    // /I - selected indices
22
23    public function __construct()
24    {
25        $this->ft = new PdfName('Ch');
26    }
27
28    public function toPdf(): string
29    {
30        $dict = $this->buildFieldDictionary();
31
32        if ($this->opt !== null) {
33            $dict->set('Opt', $this->opt);
34        }
35        if ($this->ti !== null) {
36            $dict->set('TI', new PdfNumber($this->ti));
37        }
38        if ($this->i !== null) {
39            $dict->set('I', $this->i);
40        }
41
42        return $dict->toPdf();
43    }
44}