feature/TT-12_datetime_picker_format #TT-12 fixed (#20)

Co-authored-by: Nils Burghardt <nilzbu@gmail.com>
Reviewed-on: #20

src/main/java/de/nilzbu/mytimetracker/ui/view/timeentry/TimeEntryFormConfigurer.java

@@ -13,12 +13,15 @@ import org.vaadin.crudui.crud.impl.GridCrud;
 import org.vaadin.crudui.form.CrudFormFactory;
 import org.vaadin.crudui.form.impl.form.factory.DefaultCrudFormFactory;
 
+import java.time.Duration;
 import java.time.LocalDate;
 import java.time.LocalTime;
+import java.util.Locale;
 
 final class TimeEntryFormConfigurer {
 
-    private TimeEntryFormConfigurer() {}
+    private TimeEntryFormConfigurer() {
+    }
 
     static void configure(GridCrud<TimeEntry> crud, SerializableSupplier<TimeEntry> newInstanceSupplier) {
         CrudFormFactory<TimeEntry> formFactory = new DefaultCrudFormFactory<>(TimeEntry.class);
@@ -44,15 +47,21 @@ final class TimeEntryFormConfigurer {
         formFactory.setFieldProvider("startTime", (TimeEntry bean) -> {
             TimePicker tp = new TimePicker("Start");
             tp.setRequiredIndicatorVisible(true);
+
+            tp.setLocale(Locale.of("de", "DE"));
             tp.setMin(LocalTime.of(5, 0));
             tp.setMax(LocalTime.of(23, 59));
+            tp.setStep(Duration.ofMinutes(15));
             return tp;
         });
         formFactory.setFieldProvider("endTime", (TimeEntry bean) -> {
             TimePicker tp = new TimePicker("End");
             tp.setRequiredIndicatorVisible(true);
+            tp.setLocale(Locale.of("de", "DE"));
             tp.setMin(LocalTime.of(5, 0));
             tp.setMax(LocalTime.of(23, 59));
+            tp.setStep(Duration.ofMinutes(15));
+
             return tp;
         });