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1<?php
2
3declare(strict_types=1);
4
5namespace Phpdftk\Pdf\Core\Annotation;
6
7use Phpdftk\Pdf\Core\PdfName;
8use Phpdftk\Pdf\Core\PdfReference;
9use Phpdftk\Pdf\Core\PdfVersion;
10use Phpdftk\Pdf\Core\RequiresPdfVersion;
11
12/**
13 * Widget annotation (/Subtype /Widget).
14 * Used to represent interactive form fields on a page.
15 */
16#[RequiresPdfVersion(PdfVersion::V1_2)]
17class WidgetAnnotation extends Annotation
18{
19    public ?PdfName $h = null;           // /H - highlight mode
20    public ?PdfReference $mk = null;     // /MK - appearance characteristics
21    public ?PdfReference $a = null;      // /A - action
22    public ?PdfReference $aa = null;     // /AA - additional actions
23    public ?PdfReference $parent = null; // /Parent
24
25    public function getSubtype(): string
26    {
27        return 'Widget';
28    }
29
30    public function toPdf(): string
31    {
32        $dict = $this->buildDictionary();
33
34        if ($this->h !== null) {
35            $dict->set('H', $this->h);
36        }
37        if ($this->mk !== null) {
38            $dict->set('MK', $this->mk);
39        }
40        if ($this->a !== null) {
41            $dict->set('A', $this->a);
42        }
43        if ($this->aa !== null) {
44            $dict->set('AA', $this->aa);
45        }
46        if ($this->parent !== null) {
47            $dict->set('Parent', $this->parent);
48        }
49
50        return $dict->toPdf();
51    }
52}