kontor-spring/src/main/java/de/thpeetz/kontor/comics/views/IssueForm.java

@@ -1,7 +1,5 @@
 package de.thpeetz.kontor.comics.views;
 
-import java.time.*;
-import java.time.format.*;
 import java.util.List;
 
 import com.vaadin.flow.component.ComponentEvent;
@@ -11,14 +9,16 @@ import com.vaadin.flow.component.button.Button;
 import com.vaadin.flow.component.button.ButtonVariant;
 import com.vaadin.flow.component.checkbox.Checkbox;
 import com.vaadin.flow.component.combobox.ComboBox;
-import com.vaadin.flow.component.datepicker.*;
 import com.vaadin.flow.component.formlayout.FormLayout;
 import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
 import com.vaadin.flow.component.textfield.TextField;
-import com.vaadin.flow.data.binder.*;
 
-import com.vaadin.flow.data.converter.*;
-import de.thpeetz.kontor.comics.data.*;
+import com.vaadin.flow.data.binder.BeanValidationBinder;
+import com.vaadin.flow.data.binder.Binder;
+import de.thpeetz.kontor.comics.data.Comic;
+import de.thpeetz.kontor.comics.data.Issue;
+import de.thpeetz.kontor.comics.data.Volume;
+import de.thpeetz.kontor.common.views.*;
 import lombok.extern.slf4j.Slf4j;
 
 @Slf4j
@@ -28,7 +28,7 @@ public class IssueForm extends FormLayout {
     ComboBox<Volume> volume = new ComboBox<>("Volume");
     TextField issueNumber = new TextField("Issue number");
     TextField title = new TextField("Full Title");
-    TextField publishedOn = new TextField("Published");
+    YearMonthField publishedOn = new YearMonthField();
     Checkbox isRead = new Checkbox("Read");
     Checkbox inStock = new Checkbox("In stock");
 
@@ -40,23 +40,6 @@ public class IssueForm extends FormLayout {
 
     public IssueForm(List<Comic> comics) {
         addClassName("issue-form");
-        binder.forField(publishedOn).withConverter(new Converter<String, YearMonth>() {
-            @Override
-            public Result<YearMonth> convertToModel(String value, ValueContext context) {
-                try {
-                    YearMonth result = YearMonth.parse(value);
-                    return Result.ok(result);
-                } catch (DateTimeParseException e) {
-                    return Result.error("invalid year-month format");
-                }
-            }
-
-            @Override
-            public String convertToPresentation(YearMonth value, ValueContext context) {
-                if (value == null) return "";
-                return value.format(DateTimeFormatter.ofPattern("yyyy-MM"));
-            }
-        }).bind(Issue::getPublishedOn, Issue::setPublishedOn);
         binder.bindInstanceFields(this);
 
         comic.setItems(comics);

kontor-spring/src/main/java/de/thpeetz/kontor/common/views/YearMonthField.java

@@ -0,0 +1,54 @@
+package de.thpeetz.kontor.common.views;
+
+import com.vaadin.flow.component.Unit;
+import com.vaadin.flow.component.customfield.CustomField;
+import com.vaadin.flow.component.select.Select;
+import lombok.extern.slf4j.Slf4j;
+
+import java.time.LocalDate;
+import java.time.Month;
+import java.time.YearMonth;
+import java.time.ZoneId;
+import java.time.format.TextStyle;
+import java.util.List;
+import java.util.Locale;
+import java.util.stream.IntStream;
+
+@Slf4j
+public class YearMonthField extends CustomField<YearMonth> {
+
+    private final Select<Integer> year = new Select<>();;
+    private final Select<Month> month = new Select<>();
+
+    public YearMonthField() {
+        LocalDate now = LocalDate.now(ZoneId.systemDefault());
+        List<Integer> selectableYears = IntStream.range(1970, now.getYear()).boxed().toList();
+        year.setItems(selectableYears);
+        year.setWidth(6, Unit.EM);
+        month.setItems(Month.values());
+        month.setItemLabelGenerator(m -> m.getDisplayName(TextStyle.FULL, Locale.getDefault()));
+        month.setWidth(9, Unit.EM);
+        add(year, month);
+    }
+
+    @Override
+    protected YearMonth generateModelValue() {
+        if (year.getValue() != null && month.getValue() != null) {
+            int yearValue = year.getValue();
+            int monthValue = month.getValue().getValue();
+            YearMonth result = YearMonth.of(yearValue, monthValue);
+            log.debug("YearMonthField.generateModelValue() = {}", result);
+            return result;
+        } else {
+            log.debug("YearMonthField.generateModelValue() = null");
+            return null;
+        }
+    }
+
+    @Override
+    protected void setPresentationValue(YearMonth yearMonth) {
+        if (yearMonth == null) return;
+        year.setValue(yearMonth.getYear());
+        month.setValue(yearMonth.getMonth());
+    }
+}