Locating signature with different alignments Leave feedback

GroupDocs.Signature provides ability to align signature on page with horizontal and vertical alignment settings. Signature options that implement interface IAlignment contain following properties:

• getHorizontalAlignment - property of enumeration type HorizontalAlignment to specify horizontal alignment of signature. Values are None, Left, Center, Right
• getVerticalAlignment - property of enumeration type VerticalAlignment to specify vertical alignment of signature. Values are None, Top, Center, Bottom
• getMargin- property of class Padding to specify offset for signature alignment. Fields of class are Left, Top, Right, Bottom to specify offset in measure units from alignment area.
• getMarginMeasureType - property of enumeration type MeasureType with values (Pixels, Millimeters, Percents). See more details in this example Locating signature on page with different measure units

Here are the steps to align signature on page with GroupDocs.Signature:

• Create a new instance of Signature class and pass source document path or stream as a constructor parameter.
• Instantiate signature options (ImageSignOptions for example) with all required properties.
• Set  setHorizontalAlignment with one of enumeration value to align signature along page width
• Set  setVerticalAlignment with one of enumeration value to align signature along page height
• Set  setMargin property with required offsetfrom page border
• Set  setMarginMeasureType property with non default value if there is need to specify offset from page border in another measure units like millimeters and page percents (from 100% width and 100% height)
• Call sign method of Signature class instance and pass the instance of signature options (ImageSignOptions for example) to it.

This example shows how to locate signature with different alignments.

// instantiating the signature object
final Signature signature = new Signature("sample.pdf");
 
// define qr-code size
int qrWidth = 100;
int qrHeight = 100;
// define list of options        
List<SignOptions> listOptions = new ArrayList<SignOptions>();
// walk through all alignment values to locate signature at all page alignment areas
for(int horizontalAlignment : HorizontalAlignment.getValues())
{
    for (int verticalAlignment : VerticalAlignment.getValues())
    {
        if (verticalAlignment != VerticalAlignment.None && horizontalAlignment != HorizontalAlignment.None)
        {
 
            QrCodeSignOptions options =  new QrCodeSignOptions("Left-Top");
            options.setWidth(qrWidth);
            options.setHeight(qrHeight);
            // set signature alignment
            options.setHorizontalAlignment(horizontalAlignment);
            options.setVerticalAlignment(verticalAlignment);
            options.setMargin(new Padding(5));
            listOptions.add(options);
        }
    }
}
// sign document to file
SignResult signResult = signature.sign("signed.pdf", listOptions);
// analyzing result
System.out.print("List of newly created signatures:");
int number = 1;
for(BaseSignature temp : signResult.getSucceeded())
{
    System.out.print("Signature #"+ number++ +": Type: "+temp.getSignatureType()+" Id:"+temp.getSignatureId()+
            ",Location: "+temp.getLeft()+"x"+temp.getTop()+". Size: "+temp.getWidth()+"x"+temp.getHeight());
}

You may easily run the code above and see the feature in action in our GitHub examples:

• GroupDocs.Signature for .NET examples, plugins, and showcase
• GroupDocs.Signature for Java examples, plugins, and showcase
• Document Signature for .NET MVC UI Example
• Document Signature for .NET App WebForms UI Example
• Document Signature for Java App Dropwizard UI Example
• Document Signature for Java Spring UI Example

Along with full-featured .NET library we provide simple, but powerful free Apps.
You are welcome to eSign PDF, Word, Excel, PowerPoint documents with free to use online GroupDocs Signature App.