Handwritten Signature

The PDF viewer supports adding handwritten signatures into the PDF document. The handwritten signature support reduces the paper work of reviewing the content and verify it digitally.

The PDF viewer control has an option in the toolbarSettings property to enable/disable the signature button in the default toolbar.

The following code snippet describes how to disable the signature tool in the widget.

  • c#
  • protected void Page_Load(object sender, EventArgs e)
            {
                PdfViewer1.ToolbarSettings = new Syncfusion.JavaScript.Models.PDFViewer.PdfViewerToolbarSettings();
                PdfViewer1.ToolbarSettings.Items = Syncfusion.JavaScript.PdfViewerEnums.ToolbarItems.SignatureTool;
            }

    Enable or Disable handwritten signature

    The adding of handwritten signature feature in the PDF document can be enabled or disabled using the EnableSignature property.

  • javascript
  • <ej:pdfviewer id="PdfViewer1" Height="800"  
                ServiceUrl="../api/PdfViewer" EnableSignature="true"
                PdfService="Local"
                runat="server">
            </ej:pdfviewer>

    Providing settings for hand written signature

    You can get or set the settings of the handwritten signature using the signatureSettings property. The signatureSettings property is used to set the color and opacity of the hand written signature.

  • c#
  • protected void Page_Load(object sender, EventArgs e)
            {
                PdfViewer1.SignatureSettings = new Syncfusion.JavaScript.Models.PDFViewer.PdfViewerSignatureSettings();
                PdfViewer1.SignatureSettings.Color ="#ff0000";
                PdfViewer1.SignatureSettings.Opacity = 0.5f;
    
            }

    Adding signature in the PDF document

    The handwritten signature can be added by drawing the signature content in the signature panel and clicking the button labeled ADD. The following screenshots are the pictorial representation of this.

    Signature panel

    Signature draw

    Signature add

    When the handwritten signature is added in the PDF document, the signatureAdd event will be triggered in the control. The event method can be defined using the SignatureAdd property of the control.

  • javascript
  • <ej:pdfviewer id="PdfViewer1" Height="800"  
                ServiceUrl="../api/PdfViewer" SignatureAdd="signatureAdded"
                PdfService="Local"
                runat="server">
            </ej:pdfviewer>
    <script type="text/javascript">
            function signatureAdded (args) {
                alert("A hand written signature is added in the PDF document);
            }
    </script>

    Move, Resize and Delete the Handwritten Signature

    The handwritten signature content can be moved to the specified location within the page bounds by using touch gestures, arrow keys, and mouse. We can also resize the handwritten signature content by maintaining the aspect ratio.

    When the handwritten signature is resized in the PDF viewer control, the signatureResize event will be triggered in the control. The event method can be defined using the SignatureResize property of the control.

  • javascript
  • <ej:pdfviewer id="PdfViewer1" Height="800"  
                ServiceUrl="../api/PdfViewer" SignatureResize="signatureResize"
                runat="server">
            </ej:pdfviewer>
    <script type="text/javascript">
            function signatureResize (args) {
                alert("A hand written signature is resized in the PDF viewer control);
            }
    </script>

    The selected handwritten signature content can be deleted using the “Delete” option in the context menu or delete key. The following screenshots are the pictorial representation of this.

    Signature delete

    When the handwritten signature is deleted from the PDF document, the signatureDelete event will be triggered in the control. The event method can be defined using the SignatureDelete property of the control.

  • javascript
  • <ej:pdfviewer id="PdfViewer1" Height="800"  
                ServiceUrl="../api/PdfViewer" SignatureDelete="signatureDelete"
                runat="server">
            </ej:pdfviewer>
    <script type="text/javascript">
            function signatureDelete (args) {
                alert("A hand written signature is removed from the PDF document);
            }
    </script>

    You can undo and redo the changes made to the handwritten signatures included in the PDF document using the undo() and redo() methods.

  • javascript
  • <script type="text/javascript">
        function undoChanges() {
            $(“#pdfviewer).data(ejPdfViewer).undo();
        }
        function redoChanges() {
            $(“#pdfviewer).data(ejPdfViewer).redo();
        }
    </script>

    Changing properties of handwritten signature

    The properties that is opacity and color of a handwritten signature can be modified by color palate and opacity slider, which is available in the “Properties” option in context menu. The following screenshots are the pictorial representation of this.

    Signature properties

    Select the desired color from the color palette and then click OK button.

    Signature color palette

    The selected color will be updated on the signature.

    Signature color

    You can also change the opacity of the added signature in the “properties” option.

    Signature opacity

    When a property of the handwritten signature is changed in the PDF viewer control, the signaturePropertiesChange event will be triggered in the control. The event method can be defined using the SignaturePropertiesChange property of the control.

  • javascript
  • <ej:pdfviewer id="PdfViewer1" Height="800"  
                ServiceUrl="../api/PdfViewer" SignaturePropertiesChange="signaturePropertiesChanged"
                runat="server">
            </ej:pdfviewer>
    <script type="text/javascript">
            function signaturePropertiesChanged(args) {
                alert("A property of the hand written signature is changed in the PDF viewer control);
            }
    </script>

    Saving the Signature

    The added signature can be saved to the PDF document and can be downloaded by clicking the download button in the toolbar. This action will not affect the original document.

    Signature save

    Printing the Signature

    When the print button is clicked in the toolbar, the PDF document will be printed along with the signature added to the pages. This action will not affect the original document.