import com.adms.core.signaturefield.SignatureField;
import com.vaadin.ui.Button;
import com.vaadin.ui.VerticalLayout;

public class TestSignatureField extends VerticalLayout {
    private final SignatureField sign;
    private String currentSign = null;

    public TestSignatureField() {
        sign = new SignatureField();
        sign.setWidth(300, Unit.PIXELS);
        sign.setHeight(200, Unit.PIXELS);
        sign.setCaption("New signature");
        sign.addValueChangeListener(event -> currentSign = event.getValue());
        Button clear = new Button("refresh");
        clear.addClickListener(onClick -> sign.clear());
        addComponents(sign, clear);
    }
}