JarCastingSignatureField
A Vaadin Field<String> to capture signatures. Its value is the data url from the html canvas as simple String. signature_pad by Szymon Nowak is used to capture the signature at the client-side.
Requirements
- Vaadin 7.4+
Demo
http://maxschuster.jelastic.servint.net/SignatureField/
Usage
Simple
FormLayout layout = new FormLayout();
SignatureField signatureField = new SignatureField();
signatureField.setWidth("350px");
signatureField.setHeight("150px");
layout.addComponent(signatureField);
signatureField.addValueChangeListener(new ValueChangeListener() {
@Override
public void valueChange(ValueChangeEvent event) {
String signature = (String) event.getProperty().getValue();
// do something with the string
}
});
Using DataURL
ObjectProperty<DataURL> dataUrlProperty =
new ObjectProperty<DataURL>(null, DataURL.class);
FormLayout layout = new FormLayout();
SignatureField signatureField = new SignatureField();
signatureField.setWidth("350px");
signatureField.setHeight("150px");
signatureField.setConverter(new StringToDataURLConverter());
signatureField.setPropertyDataSource(dataUrlProperty);
layout.addComponent(signatureField);
dataUrlProperty.addValueChangeListener(new ValueChangeListener() {
@Override
public void valueChange(ValueChangeEvent event) {
final DataURL signature = (DataURL) event.getProperty().getValue();
String mimeType = signature.getAppliedMimeType();
byte[] data = signature.getData();
// do something with the data
}
});
Licence
- SignatureField Add-on: Apache License Version 2.0
- signature_pad: MIT License