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merged 1 commit into from
Sep 4, 2025
Merged

940461: Sample on How to Rotate PDF pages programmatically using a custom toolbar button #39

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38 changes: 38 additions & 0 deletions How to/Rotate PDF pages programmatically using a custom toolbar button/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">
<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>
112 changes: 112 additions & 0 deletions How to/Rotate PDF pages programmatically using a custom toolbar button/index.js
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// Render the PDF viewer control
var toolItem1 = {
prefixIcon: 'e-icons e-transform-left',
id: 'rotateCounterclockwise',
tooltipText: 'Custom toolbar item',
};
var toolItem2 = {
prefixIcon: 'e-icons e-transform-right',
id: 'rotateClockwise',
tooltipText: 'Custom toolbar item',
};
var viewer = new ej.pdfviewer.PdfViewer({
documentPath: 'https://cdn.syncfusion.com/content/pdf/form-designer.pdf',
resourceUrl: 'https://cdn.syncfusion.com/ej2/30.1.37/dist/ej2-pdfviewer-lib',
toolbarSettings: {
toolbarItems: [
toolItem1,
toolItem2,
'OpenOption',
'PageNavigationTool',
'MagnificationTool',
'PanTool',
'SelectionTool',
'SearchOption',
'PrintOption',
'DownloadOption',
'UndoRedoTool',
'AnnotationEditTool',
'FormDesignerEditTool',
'CommentTool',
'SubmitForm',
],
},
});
ej.pdfviewer.PdfViewer.Inject(
ej.pdfviewer.Toolbar,
ej.pdfviewer.Magnification,
ej.pdfviewer.BookmarkView,
ej.pdfviewer.ThumbnailView,
ej.pdfviewer.TextSelection,
ej.pdfviewer.TextSearch,
ej.pdfviewer.Print,
ej.pdfviewer.Navigation,
ej.pdfviewer.LinkAnnotation,
ej.pdfviewer.Annotation,
ej.pdfviewer.FormFields,
ej.pdfviewer.FormDesigner,
ej.pdfviewer.PageOrganizer
);

viewer.appendTo('#pdfViewer');
//Handle toolbar button click events
viewer.toolbarClick = function (args) {
// Rotate Clockwise
if (args.item && args.item.id === 'rotateClockwise') {
viewer.saveAsBlob().then(function (value) {
var reader = new FileReader();
reader.readAsDataURL(value);
reader.onload = () => {
//convert blob to base64 and load into PdfDocument
var base64 = reader.result.split('base64,')[1];
let pdfDocument = new ej.pdf.PdfDocument(base64);
//Get the first page and increment rotation
let page = pdfDocument.getPage(0); // Provide the required page number index here
var rotation = page.rotation + 1;
if (rotation > 4) {
rotation = 0;
}
page.rotation = rotation;
// Save and reload the rotated PDF
pdfDocument.saveAsBlob().then((value) => {
var reader = new FileReader();
reader.readAsDataURL(value.blobData);
reader.onload = () => {
var base64data = reader.result;
console.log(base64data);
viewer.load(base64data);
};
});
};
});
}
// Rotate Counterclockwise
else if (args.item && args.item.id === 'rotateCounterclockwise') {
viewer.saveAsBlob().then(function (value) {
var reader = new FileReader();
reader.readAsDataURL(value);
reader.onload = () => {
// Convert blob to base64 and load into PdfDocument
var base64 = reader.result.split('base64,')[1];
let pdfDocument = new ej.pdf.PdfDocument(base64);
//Get the first page and decrement rotation
let page = pdfDocument.getPage(0); // Provide the required page number index here
var rotation = page.rotation - 1;
if (rotation < 0) {
rotation = 3;
}
page.rotation = rotation;
// Save and reload the rotated PDF
pdfDocument.saveAsBlob().then((value) => {
var reader = new FileReader();
reader.readAsDataURL(value.blobData);
reader.onload = () => {
var base64data = reader.result;
console.log(base64data);
viewer.load(base64data);
};
});
};
});
}
};