fix #1092 Calendar MonthPicker YearPicker interactions not correct

Author: vegegoku

domino-ui/src/main/java/org/dominokit/domino/ui/datepicker/Calendar.java

@@ -293,6 +293,11 @@ public Date getDate() {
     return this.date;
   }
 
+  @Override
+  public Date getActiveSelection() {
+    return selectors.getDate() != null ? selectors.getDate() : getDate();
+  }
+
   /**
    * Change the selected date.
    *

domino-ui/src/main/java/org/dominokit/domino/ui/datepicker/CalendarSelectors.java

@@ -232,4 +232,8 @@ public HTMLDivElement element() {
   public void onUpdateCalendarView(Date date) {
     setDate(date);
   }
+
+  public Date getDate() {
+    return this.date;
+  }
 }

domino-ui/src/main/java/org/dominokit/domino/ui/datepicker/IsCalendar.java

@@ -82,4 +82,6 @@ public interface IsCalendar {
    * @return The calendar initialization configuration.
    */
   CalendarInitConfig getConfig();
+
+  Date getActiveSelection();
 }

domino-ui/src/main/java/org/dominokit/domino/ui/datepicker/MonthsPicker.java

@@ -92,7 +92,7 @@ MonthsPicker updateView() {
                 .textContent(months[counter])
                 .addClickListener(
                     evt -> {
-                      Date calendarDate = calendar.getDate();
+                      Date calendarDate = calendar.getActiveSelection();
                       Date date = new Date(calendarDate.getTime());
                       date.setDate(1);
                       date.setMonth(month);

domino-ui/src/main/java/org/dominokit/domino/ui/datepicker/YearPicker.java

@@ -72,7 +72,7 @@ public YearPicker(IsCalendar calendar, int referenceYear) {
                 .textContent(String.valueOf(counter + 1900))
                 .addClickListener(
                     evt -> {
-                      Date date = new Date(calendar.getDate().getTime());
+                      Date date = new Date(calendar.getActiveSelection().getTime());
                       date.setYear(year);
                       dispatchEvent(CalendarCustomEvents.dateNavigationChanged(date.getTime()));
                     }));