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845073: Sample for Show and Hide Annotation #36

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Merged
merged 2 commits into from
Jul 24, 2025
Merged

845073: Sample for Show and Hide Annotation #36

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375f302
845073: Sample for Show and Hide Annotation
SF4524LogeshKumar May 27, 2025
ebcc684
845073: Updated sample to standalone to Show/Hide Annotation
SF4524LogeshKumar Jul 17, 2025
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38 changes: 38 additions & 0 deletions How to/Show and Hide Annotation/index.html
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<!DOCTYPE html><html lang="en"><head>
<title>EJ2 PDF Viewer</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="Typescript PDF Viewer Control">
<meta name="author" content="Syncfusion">
<link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-base/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-pdfviewer/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-buttons/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-popups/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-navigations/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-dropdowns/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-lists/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-inputs/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-splitbuttons/styles/material.css" rel="stylesheet">
<link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-notifications/styles/material.css" rel="stylesheet">

<!-- Essential JS 2 PDF Viewer's script -->
<script src="https://cdn.syncfusion.com/ej2/30.1.37/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>

<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
<div id="container">
<button id="hideBtn">Hide Annotations</button>
<button id="unhideBtn">Unhide Annotations</button>
<div id="PdfViewer" style="height:500px;width:100%;"></div>
</div>

<script>
var ele = document.getElementById('container');
if(ele) {
ele.style.visibility = "visible";
}
</script>
<script src="index.js" type="text/javascript"></script>
</body></html>
28 changes: 28 additions & 0 deletions How to/Show and Hide Annotation/index.js
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let exportObject = null;
let annotationsVisible = true;

var pdfviewer = new ej.pdfviewer.PdfViewer({
resourceUrl: 'https://cdn.syncfusion.com/ej2/30.1.37/dist/ej2-pdfviewer-lib',
documentPath: 'https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf',
});
ej.pdfviewer.PdfViewer.Inject(ej.pdfviewer.TextSelection, ej.pdfviewer.TextSearch, ej.pdfviewer.Print, ej.pdfviewer.Navigation, ej.pdfviewer.Toolbar,
ej.pdfviewer.Magnification, ej.pdfviewer.Annotation, ej.pdfviewer.FormDesigner, ej.pdfviewer.FormFields, ej.pdfviewer.PageOrganizer);
pdfviewer.appendTo('#PdfViewer');

// Function to hide annotations
function HideAnnotations() {
var proxy = this;
pdfviewer.exportAnnotationsAsObject().then(function(value) {
exportObject = value;
pdfviewer.deleteAnnotations();
});
}

// Function to unhide annotations
function UnHideAnnotations() {
pdfviewer.importAnnotation(JSON.parse(exportObject));
}

// Add event listeners to buttons
document.getElementById('hideBtn').addEventListener('click', HideAnnotations);
document.getElementById('unhideBtn').addEventListener('click', UnHideAnnotations);