preparation for postgresql database storage, some workflow corrections

.gitignore

@@ -14,3 +14,5 @@ frontend/
 node_modules/
 
 data/
+
+images/

pom.xml

@@ -99,6 +99,10 @@
 			<artifactId>h2</artifactId>
 			<scope>runtime</scope>
 		</dependency>
+		<dependency>
+		    <groupId>org.postgresql</groupId>
+		    <artifactId>postgresql</artifactId>
+		</dependency>
 
 		<dependency>
 			<groupId>org.springframework.boot</groupId>

sql/create_tables_postgresql.sql

@@ -0,0 +1,104 @@
+CREATE DATABASE trainer_abrechnungen
+    WITH
+    ENCODING = 'UTF8'
+    LC_COLLATE = 'German_Germany.1252'
+    LC_CTYPE = 'German_Germany.1252'
+    CONNECTION LIMIT = -1;
+
+CREATE TABLE public.USERDATA
+(
+    id bigint NOT NULL,
+    principal_id character varying(255) NOT NULL,
+    email character varying(255) NOT NULL,
+    family_name character varying(255) NOT NULL,
+    given_name character varying(255) NOT NULL,
+    updated timestamp without time zone,
+    created timestamp without time zone,
+    CONSTRAINT user_pkey PRIMARY KEY (id)
+);
+
+CREATE TABLE public.adress
+(
+    user_id bigint NOT NULL,
+    adress1 character varying(255) NOT NULL,
+    adress2 character varying(255),
+    updated timestamp without time zone,
+    city character varying(155),
+    created timestamp without time zone,
+    zip character varying(45),
+    CONSTRAINT adress_pkey PRIMARY KEY (user_id),
+    CONSTRAINT adress_user_fk FOREIGN KEY (user_id) REFERENCES public.USERDATA(id)
+);
+
+CREATE TABLE public.article
+(
+    id bigint NOT NULL,
+    updated timestamp without time zone,
+    created timestamp without time zone,
+    description character varying(255),
+    price numeric(19,2),
+    report_ressource character varying(255),
+    title character varying(50) NOT NULL,
+    user_id bigint NOT NULL,
+    CONSTRAINT article_pkey PRIMARY KEY (id),
+    CONSTRAINT article_user_fk FOREIGN KEY (user_id) REFERENCES public.USERDATA(id)
+);
+
+CREATE TABLE public.banking_connection
+(
+    user_id bigint NOT NULL,
+    bank_name character varying(150) NOT NULL,
+    bic character varying(150),
+    updated timestamp without time zone,
+    created timestamp without time zone,
+    iban character varying(150) NOT NULL,
+    CONSTRAINT banking_connection_pkey PRIMARY KEY (user_id),
+    CONSTRAINT banking_connection_user_fk FOREIGN KEY (user_id) REFERENCES public.USERDATA(id)
+);
+
+CREATE TABLE public.invoice
+(
+    id bigint NOT NULL,
+    updated timestamp without time zone,
+    created timestamp without time zone,
+    invoice_date timestamp without time zone,
+    invoiceid character varying(150) NOT NULL,
+    report_ressource character varying(255),
+    sign_image_path character varying(255),
+    user_id bigint NOT NULL,
+    CONSTRAINT invoice_pkey PRIMARY KEY (id),
+    CONSTRAINT invoice_user_fk FOREIGN KEY (user_id) REFERENCES public.USERDATA(id),
+	CONSTRAINT invoiceid_unique UNIQUE (user_id, invoiceid)
+);
+
+CREATE TABLE public.invoice_item
+(
+    id bigint NOT NULL,
+    description character varying(255) NULL,
+    start_time timestamp without time zone,
+    end_time timestamp without time zone,
+    participants character varying(15),
+    price_per_hour numeric(19,2),
+    sum_price numeric(19,2),
+    article_id bigint NOT NULL,
+    invoice_id bigint NULL,
+    created timestamp without time zone,
+    updated timestamp without time zone,
+    CONSTRAINT invoice_item_pkey PRIMARY KEY (id),
+    CONSTRAINT invoice_item_article_fk FOREIGN KEY (article_id) REFERENCES public.article(id),
+    CONSTRAINT invoice_item_invoice_fk FOREIGN KEY (invoice_id) REFERENCES public.invoice(id)
+);
+
+ALTER TABLE IF EXISTS public.USERDATA
+    OWNER TO trainer;
+ALTER TABLE IF EXISTS public.adress
+    OWNER TO trainer;
+ALTER TABLE IF EXISTS public.article
+    OWNER TO trainer;
+ALTER TABLE IF EXISTS public.banking_connection
+    OWNER TO trainer;
+ALTER TABLE IF EXISTS public.invoice
+    OWNER TO trainer;
+ALTER TABLE IF EXISTS public.invoice_item
+    OWNER TO trainer;
+

sql/drop_tables_postgresql.sql

@@ -0,0 +1,6 @@
+DROP TABLE IF EXISTS public.invoice_item;
+DROP TABLE IF EXISTS public.invoice;
+DROP TABLE IF EXISTS public.adress;
+DROP TABLE IF EXISTS public.banking_connection;
+DROP TABLE IF EXISTS public.article;
+DROP TABLE IF EXISTS public.USERDATA;

src/main/java/de/kreth/invoice/business/InvoiceBusiness.java

@@ -38,6 +38,16 @@ public class InvoiceBusiness extends AbstractBusiness<Invoice> {
 	return save;
     }
 
+    @Override
+    public boolean delete(Invoice obj) {
+
+	for (InvoiceItem i : obj.getItems()) {
+	    i.setInvoice(null);
+	    itemRepository.save(i);
+	}
+	return super.delete(obj);
+    }
+
     public String createNextInvoiceId(List<Invoice> invoices, String pattern) {
 
 	Optional<Invoice> latest = invoices.stream()

src/main/java/de/kreth/invoice/data/InvoiceItem.java

@@ -19,8 +19,8 @@ public class InvoiceItem extends BaseEntity {
 
     private static final long serialVersionUID = 3142997452876778041L;
 
-    private LocalDateTime start;
-    private LocalDateTime end;
+    private LocalDateTime startTime;
+    private LocalDateTime endTime;
     @Column(nullable = true, length = 15)
     private String participants;
     @Column(nullable = true, length = 255)
@@ -44,20 +44,20 @@ public class InvoiceItem extends BaseEntity {
     }
 
     public LocalDateTime getStart() {
-	return start;
+	return startTime;
     }
 
-    public void setStart(LocalDateTime start) {
-	this.start = start;
+    public void setStart(LocalDateTime startTime) {
+	this.startTime = startTime;
 	getSumPrice();
     }
 
     public LocalDateTime getEnd() {
-	return end;
+	return endTime;
     }
 
-    public void setEnd(LocalDateTime end) {
-	this.end = end;
+    public void setEnd(LocalDateTime endTime) {
+	this.endTime = endTime;
 	getSumPrice();
     }
 
@@ -82,9 +82,9 @@ public class InvoiceItem extends BaseEntity {
     }
 
     public BigDecimal getSumPrice() {
-	if (article == null || start == null || end == null) {
+	if (article == null || startTime == null || endTime == null) {
 	    sumPrice = null;
-	    return null;
+	    return BigDecimal.ZERO;
 	}
 
 	sumPrice = BigDecimal.valueOf(getDurationInMinutes())
@@ -104,10 +104,10 @@ public class InvoiceItem extends BaseEntity {
     }
 
     public long getDurationInMinutes() {
-	if (start == null || end == null) {
+	if (startTime == null || endTime == null) {
 	    return -1L;
 	}
-	return start.until(end, ChronoUnit.MINUTES);
+	return startTime.until(endTime, ChronoUnit.MINUTES);
     }
 
     public String getDescription() {
@@ -123,13 +123,13 @@ public class InvoiceItem extends BaseEntity {
 
     @Override
     protected String getMediumRepresentation() {
-	return DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM, FormatStyle.SHORT).format(start);
+	return DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM, FormatStyle.SHORT).format(endTime);
     }
 
     @Override
     public String toString() {
-	return "InvoiceItem [id=" + getId() + ", start=" + start + ", end="
-		+ end + ", article=" + article + "]";
+	return "InvoiceItem [id=" + getId() + ", start=" + startTime + ", end="
+		+ endTime + ", article=" + article + "]";
     }
 
     @Override
@@ -137,8 +137,8 @@ public class InvoiceItem extends BaseEntity {
 	final int prime = 31;
 	int result = 1;
 	result = prime * result + ((article == null) ? 0 : article.hashCode());
-	result = prime * result + ((end == null) ? 0 : end.hashCode());
-	result = prime * result + ((start == null) ? 0 : start.hashCode());
+	result = prime * result + ((endTime == null) ? 0 : endTime.hashCode());
+	result = prime * result + ((startTime == null) ? 0 : endTime.hashCode());
 	return result;
     }
 
@@ -161,18 +161,18 @@ public class InvoiceItem extends BaseEntity {
 	} else if (!article.equals(other.article)) {
 	    return false;
 	}
-	if (end == null) {
-	    if (other.end != null) {
+	if (endTime == null) {
+	    if (other.endTime != null) {
 		return false;
 	    }
-	} else if (!end.equals(other.end)) {
+	} else if (!endTime.equals(other.endTime)) {
 	    return false;
 	}
-	if (start == null) {
-	    if (other.start != null) {
+	if (startTime == null) {
+	    if (other.startTime != null) {
 		return false;
 	    }
-	} else if (!start.equals(other.start)) {
+	} else if (!endTime.equals(other.endTime)) {
 	    return false;
 	}
 	return true;

src/main/java/de/kreth/invoice/data/User.java

@@ -14,7 +14,7 @@ import javax.persistence.Table;
 import org.keycloak.representations.AccessToken;
 
 @Entity
-@Table(name = "USER")
+@Table(name = "USERDATA")
 @Inheritance(strategy = InheritanceType.SINGLE_TABLE)
 public class User extends BaseEntity {
 

src/main/java/de/kreth/invoice/views/View.java

@@ -165,7 +165,7 @@ public class View extends VerticalLayout implements BeforeEnterObserver {
 	    }
 	});
 	invoiceCompoent = new InvoiceOverviewComponent(invoiceRepository, user, itemsForInvoice);
-	invoiceCompoent.addInvoiceCreationListener(() -> invoiceItems.refreshData());
+	invoiceCompoent.addInvoiceCountChangeListener(() -> invoiceItems.refreshData());
 
 	layout.add(invoiceItems);
 	layout.add(invoiceCompoent);

src/main/java/de/kreth/invoice/views/article/ArticleDialog.java

@@ -60,7 +60,7 @@ public class ArticleDialog extends Dialog {
 	description = new TextField();
 	description.setLabel("Beschreibung");
 
-	isTrainer = new Checkbox("als Trainer", false);
+	isTrainer = new Checkbox("mit Trainerlizenz", false);
 
 	FormLayout contentValues = new FormLayout();
 	contentValues.add(title, pricePerHour, description, isTrainer);
@@ -229,7 +229,7 @@ public class ArticleDialog extends Dialog {
 	articleGrid.addColumn(Article::getDescription)
 		.setHeader("Beschreibung");
 	articleGrid.addColumn(this::reportToCheckbox)
-		.setHeader("Report");
+		.setHeader("Trainer Vorlage");
 
 	articleGrid.addSelectionListener(sel -> {
 	    if (!binder.hasChanges()) {

src/main/java/de/kreth/invoice/views/invoice/InvoiceDialog.java

@@ -3,6 +3,7 @@ package de.kreth.invoice.views.invoice;
 import static de.kreth.invoice.Application.getString;
 import static de.kreth.invoice.Localization_Properties.CAPTION_INVOICE_PRINTSIGNATURE;
 import static de.kreth.invoice.Localization_Properties.LABEL_CANCEL;
+import static de.kreth.invoice.Localization_Properties.LABEL_CLOSE;
 import static de.kreth.invoice.Localization_Properties.LABEL_OPEN;
 import static de.kreth.invoice.Localization_Properties.LABEL_PREVIEW;
 import static de.kreth.invoice.Localization_Properties.LABEL_STORE;
@@ -14,7 +15,10 @@ import java.io.OutputStream;
 import java.io.PipedInputStream;
 import java.io.PipedOutputStream;
 import java.nio.file.Files;
+import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
+import java.util.Objects;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
@@ -78,6 +82,10 @@ public class InvoiceDialog extends Dialog {
 
     private Checkbox printSignature;
 
+    private final List<String> existingInvoiceNumbers = new ArrayList<>();
+
+    private Button deleteButton;
+
     /**
      * Initializes the Dialog with an empty {@link Invoice}.
      * <p>
@@ -118,18 +126,24 @@ public class InvoiceDialog extends Dialog {
 	    }
 	});
 	okButton = new Button(getString(LABEL_STORE), ev -> close());
-	Button cancel = new Button(getString(LABEL_CANCEL), ev -> close());
+	deleteButton = new Button("Löschen");
 
-	String caption;
+	String previewCaption;
+	String closeCaption;
 	if (pdfOpenLabel == InvoiceMode.VIEW_ONLY) {
-	    caption = getString(LABEL_OPEN);
+	    previewCaption = getString(LABEL_OPEN);
+	    closeCaption = getString(LABEL_CLOSE);
+	    okButton.setVisible(false);
 	} else {
-	    caption = getString(LABEL_PREVIEW);
+	    previewCaption = getString(LABEL_PREVIEW);
+	    closeCaption = getString(LABEL_CANCEL);
+	    deleteButton.setVisible(false);
 	}
-	Button previewButton = new Button(caption, this::showPdf);
+	Button cancel = new Button(closeCaption, ev -> close());
+	Button previewButton = new Button(previewCaption, this::showPdf);
 
 	HorizontalLayout btnLayout = new HorizontalLayout();
-	btnLayout.add(okButton, cancel, previewButton);
+	btnLayout.add(okButton, cancel, previewButton, deleteButton);
 
 	VerticalLayout vLayout = new VerticalLayout();
 
@@ -144,6 +158,14 @@ public class InvoiceDialog extends Dialog {
     private void updateInvoiceNo(ValueChangeEvent<String> ev) {
 	if (invoice != null) {
 	    invoice.setInvoiceId(ev.getValue());
+	    if (existingInvoiceNumbers.contains(invoice.getInvoiceId())) {
+		invoiceNo.setErrorMessage("Die Rechnungsnummer existiert bereits. Sie muss eindeutig sein.");
+		invoiceNo.setInvalid(true);
+		okButton.setEnabled(false);
+	    } else {
+		invoiceNo.setInvalid(false);
+		okButton.setEnabled(true);
+	    }
 	}
     }
 
@@ -209,9 +231,9 @@ public class InvoiceDialog extends Dialog {
 		}
 	    }
 	};
+
 	new StreamResource("invoice.pdf", inStream);
 	Anchor link = new Anchor(resourceFrame, "Download PDF");
-	// r("Download PDF", new FileResource(outFile));
 
 	link.addFocusListener(ev -> LOGGER.debug("Download link clicked."));
 	link.addAttachListener(ev -> LOGGER.debug("Download link attached."));
@@ -234,8 +256,14 @@ public class InvoiceDialog extends Dialog {
 	return okButton.addClickListener(listener);
     }
 
-    public void setInvoice(Invoice invoice) {
-	this.invoice = invoice;
+    public Registration addDeleteClickListener(ComponentEventListener<ClickEvent<Button>> listener) {
+	return deleteButton.addClickListener(listener);
+    }
+
+    public void setInvoice(Invoice invoice, List<String> existingInvoiceNumbers) {
+	this.invoice = Objects.requireNonNull(invoice);
+	this.existingInvoiceNumbers.clear();
+	this.existingInvoiceNumbers.addAll(existingInvoiceNumbers);
 	signature = new Signature(invoice.getUser());
 	invoiceNo.setValue(invoice.getInvoiceId());
 	invoiceDate.setValue(invoice.getInvoiceDate().toLocalDate());

src/main/java/de/kreth/invoice/views/invoice/InvoiceGrid.java

@@ -8,6 +8,7 @@ import java.util.List;
 
 import com.vaadin.flow.component.grid.Grid;
 import com.vaadin.flow.data.provider.DataProvider;
+import com.vaadin.flow.data.provider.ListDataProvider;
 import com.vaadin.flow.data.renderer.LocalDateTimeRenderer;
 import com.vaadin.flow.data.renderer.NumberRenderer;
 
@@ -41,4 +42,10 @@ public class InvoiceGrid extends Grid<Invoice> {
 	this.items.addAll(items);
 	getDataProvider().refreshAll();
     }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public ListDataProvider<Invoice> getDataProvider() {
+	return (ListDataProvider<Invoice>) super.getDataProvider();
+    }
 }

src/main/java/de/kreth/invoice/views/invoiceitem/InvoiceItemDialog.java

@@ -110,7 +110,7 @@ public class InvoiceItemDialog {
 	item.setStart(LocalDateTime.of(startDate.getValue(), startTime.getValue()));
 	item.setEnd(LocalDateTime.of(startDate.getValue(), endTime.getValue()));
 	item.setParticipants(participants.getValue());
-
+	item.getSumPrice();
     }
 
     public interface DialogCloseListener {

src/main/java/de/kreth/invoice/views/invoiceitem/InvoiceItemOverviewComponent.java

@@ -105,7 +105,9 @@ public class InvoiceItemOverviewComponent extends VerticalLayout {
     }
 
     public void refreshData() {
-	grid.setItems(invoiceItemRepository.findByInvoiceIsNull(user));
+	List<InvoiceItem> findByInvoiceIsNull = invoiceItemRepository.findByInvoiceIsNull(user);
+	findByInvoiceIsNull.sort((i1, i2) -> i1.getStart().compareTo(i2.getStart()));
+	grid.setItems(findByInvoiceIsNull);
 	grid.deselectAll();
 	grid.getDataProvider().refreshAll();
 	ItemSelectionChangeEvent evt = new ItemSelectionChangeEvent(getAllItems());

src/main/java/de/kreth/invoice/views/invoiceitem/InvoiceOverviewComponent.java

@@ -13,8 +13,6 @@ import com.vaadin.flow.component.ClickEvent;
 import com.vaadin.flow.component.button.Button;
 import com.vaadin.flow.component.confirmdialog.ConfirmDialog;
 import com.vaadin.flow.component.formlayout.FormLayout;
-import com.vaadin.flow.component.grid.contextmenu.GridContextMenu;
-import com.vaadin.flow.component.grid.contextmenu.GridContextMenu.GridContextMenuItemClickEvent;
 import com.vaadin.flow.component.html.H3;
 import com.vaadin.flow.component.notification.Notification;
 import com.vaadin.flow.component.orderedlayout.VerticalLayout;
@@ -35,7 +33,8 @@ public class InvoiceOverviewComponent extends VerticalLayout {
     private final InvoiceBusiness business;
     private final User user;
     private final List<InvoiceItem> itemsForInvoice;
-    private final List<InvoiceCreationListener> creationListener;
+    private final List<InvoiceCountChangeListener> creationListener;
+    private InvoiceDialog invoiceDialog;
 
     public InvoiceOverviewComponent(InvoiceBusiness business, User user, List<InvoiceItem> itemsForInvoice) {
 	super();
@@ -51,31 +50,34 @@ public class InvoiceOverviewComponent extends VerticalLayout {
 		addButton);
 	add(new VerticalLayout(titleComponent, grid));
 	grid.addItemClickListener(ev -> openDialog(ev.getItem(), InvoiceMode.VIEW_ONLY));
-	GridContextMenu<Invoice> menu = grid.addContextMenu();
-	menu.addItem("Löschen", this::delete);
 
     }
 
-    private void delete(GridContextMenuItemClickEvent<Invoice> event) {
-	if (event.getItem().isPresent()) {
+    private void confirmAndExecuteDelete(Invoice item) {
 	ConfirmDialog dlg = new ConfirmDialog();
 	dlg.setHeader(getString(Localization_Properties.MESSAGE_DELETE_TITLE));
 	dlg.setText(MessageFormat.format(getString(Localization_Properties.MESSAGE_DELETE_TEXT),
-		    event.getItem().get()));
+		item));
 	dlg.setCancelable(true);
 	dlg.setCancelText("Nicht " + getString(Localization_Properties.LABEL_DELETE));
 	dlg.setConfirmText(getString(Localization_Properties.LABEL_DELETE));
 	dlg.addConfirmListener(ev -> {
-		business.delete(event.getItem().get());
+	    business.delete(item);
+	    if (invoiceDialog != null) {
+		invoiceDialog.close();
+	    }
 	    refreshData();
+	    for (InvoiceCountChangeListener invoiceCreationListener : creationListener) {
+		invoiceCreationListener.invoiceCreated();
+	    }
 	});
 	dlg.open();
     }
-    }
 
     public void refreshData() {
 
 	List<Invoice> loadAll = business.loadAll(invoice -> user.equals(invoice.getUser()));
+	loadAll.sort((i1, i2) -> i1.getInvoiceDate().compareTo(i2.getInvoiceDate()));
 	grid.setItems(loadAll);
 	grid.getDataProvider().refreshAll();
     }
@@ -97,24 +99,35 @@ public class InvoiceOverviewComponent extends VerticalLayout {
     }
 
     private void openDialog(Invoice invoice, InvoiceMode mode) {
-	InvoiceDialog dlg = new InvoiceDialog(mode);
-	dlg.setInvoice(invoice);
-	dlg.addOkClickListener(evt -> {
+	invoiceDialog = new InvoiceDialog(mode);
+	List<String> invoiceIds = new ArrayList<>();
+
+	grid.getDataProvider().getItems().forEach(inv -> invoiceIds.add(inv.getInvoiceId().strip()));
+	invoiceDialog.setInvoice(invoice, invoiceIds);
+	invoiceDialog.addOkClickListener(evt -> {
 	    business.save(invoice);
 	    refreshData();
-	    for (InvoiceCreationListener invoiceCreationListener : creationListener) {
+	    for (InvoiceCountChangeListener invoiceCreationListener : creationListener) {
 		invoiceCreationListener.invoiceCreated();
 	    }
 	});
-	dlg.open();
-	dlg.addOpenedChangeListener(evt -> refreshData());
+	invoiceDialog.addDeleteClickListener(evt -> {
+	    confirmAndExecuteDelete(invoice);
+	});
+	invoiceDialog.open();
+	invoiceDialog.addOpenedChangeListener(evt -> refreshData());
+	invoiceDialog.addOpenedChangeListener(ev -> {
+	    if (ev.isOpened() == false) {
+		invoiceDialog = null;
+	    }
+	});
     }
 
-    public void addInvoiceCreationListener(InvoiceCreationListener listener) {
+    public void addInvoiceCountChangeListener(InvoiceCountChangeListener listener) {
 	this.creationListener.add(listener);
     }
 
-    public static interface InvoiceCreationListener {
+    public static interface InvoiceCountChangeListener {
 	void invoiceCreated();
     }
 }

src/main/java/de/kreth/invoice/views/user/UserDetailsDialog.java

@@ -14,6 +14,7 @@ import org.slf4j.LoggerFactory;
 
 import com.vaadin.flow.component.button.Button;
 import com.vaadin.flow.component.dialog.Dialog;
+import com.vaadin.flow.component.formlayout.FormLayout;
 import com.vaadin.flow.component.html.Hr;
 import com.vaadin.flow.component.html.Image;
 import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
@@ -62,9 +63,7 @@ public class UserDetailsDialog extends Dialog {
     private final Button okButton;
 
     private final Image signatureImage;
-//
-//    private final UserBankRepository bankRepository;
-//    private final UserAdressRepository adressRepository;
+    private final Upload upload;
 
     private User user;
 
@@ -127,11 +126,9 @@ public class UserDetailsDialog extends Dialog {
 		.bind(UserAdress::getCity, UserAdress::setCity);
 
 	signatureImage = new Image();
-	signatureImage.setWidth("192px");
-	signatureImage.setHeight("62px");
 	signatureImage.setAlt("Keine Unterschrift konfiguriert");
 
-	Upload upload = new Upload(this::receiveUpload);
+	upload = new Upload(this::receiveUpload);
 	upload.addFinishedListener(ev -> updateSignatureImage());
 
 	VerticalLayout layout = new VerticalLayout();
@@ -142,7 +139,7 @@ public class UserDetailsDialog extends Dialog {
 	HorizontalLayout cityLayout = new HorizontalLayout();
 	cityLayout.add(zipCode, city);
 
-	layout.add(adress1, adress2, cityLayout, new HorizontalLayout(signatureImage, upload));
+	layout.add(adress1, adress2, cityLayout, new FormLayout(signatureImage, upload));
 
 	okButton = new Button("OK", ev -> {
 	    BinderValidationStatus<UserBank> bankValidation = bankBinder.validate();
@@ -191,7 +188,8 @@ public class UserDetailsDialog extends Dialog {
     }
 
     private void updateSignatureImage() {
-	if (user != null) {
+	if (user != null && user.getId() != null) {
+	    upload.setUploadButton(null);
 	    Signature signature = new Signature(user);
 	    if (signature.isSignatureImageExists()) {
 		File signatureUrl = signature.getSignatureUrl();
@@ -210,8 +208,16 @@ public class UserDetailsDialog extends Dialog {
 			}
 		    }
 		});
+		signatureImage.setWidth("192px");
+		signatureImage.setHeight("62px");
 		signatureImage.setSrc(resource);
 	    }
+	} else {
+	    signatureImage.setWidth(null);
+	    signatureImage.setHeight(null);
+	    upload.setVisible(false);
+	    signatureImage.setAlt(
+		    "Eine Unterschrift kann konfiguriert werden, nachdem die Benutzerdaten gespeichert wurden.");
 	}
     }
 

src/main/resources/localization.properties

@@ -62,7 +62,7 @@ label.logout        = Abmelden
 label.ok            = OK
 label.store         = Speichern
 label.preview       = Vorschau
-label.open          = \u00D6ffnen
+label.open          = PDF \u00D6ffnen
 label.user.register = Registrieren
 
 message.article.priceerror             = Bitte legen Sie den Preis fest.