consider null delay and null refresh rate as no change

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/leaderboard/LeaderboardPanel.java

@@ -254,12 +254,18 @@ public class LeaderboardPanel extends FormPanel implements TimeListener, PlaySta
                 }
             }
         }
-        selectedManeuverDetails.clear();
-        selectedManeuverDetails.addAll(newSettings.getManeuverDetailsToShow());
-        selectedLegDetails.clear();
-        selectedLegDetails.addAll(newSettings.getLegDetailsToShow());
-        selectedRaceDetails.clear();
-        selectedRaceDetails.addAll(newSettings.getRaceDetailsToShow());
+        if (newSettings.getManeuverDetailsToShow() != null) {
+            selectedManeuverDetails.clear();
+            selectedManeuverDetails.addAll(newSettings.getManeuverDetailsToShow());
+        }
+        if (newSettings.getLegDetailsToShow() != null) {
+            selectedLegDetails.clear();
+            selectedLegDetails.addAll(newSettings.getLegDetailsToShow());
+        }
+        if (newSettings.getRaceDetailsToShow() != null) {
+            selectedRaceDetails.clear();
+            selectedRaceDetails.addAll(newSettings.getRaceDetailsToShow());
+        }
         if (newSettings.getRaceColumnsToShow() != null) {
             selectedRaceColumns.clear();
             selectedRaceColumns.addAll(newSettings.getRaceColumnsToShow());
@@ -269,8 +275,12 @@ public class LeaderboardPanel extends FormPanel implements TimeListener, PlaySta
         updateLeaderboard(leaderboard);
         setAutoExpandFirstRace(newSettings.isAutoExpandFirstRace());
 
-        timer.setRefreshInterval(newSettings.getDelayBetweenAutoAdvancesInMilliseconds());
-        setDelayInMilliseconds(newSettings.getDelayInMilliseconds());
+        if (newSettings.getDelayBetweenAutoAdvancesInMilliseconds() != null) {
+            timer.setRefreshInterval(newSettings.getDelayBetweenAutoAdvancesInMilliseconds());
+        }
+        if (newSettings.getDelayInMilliseconds() != null) {
+            setDelayInMilliseconds(newSettings.getDelayInMilliseconds());
+        }
         for (ExpandableSortableColumn<?> expandableSortableColumn : columnsToExpandAgain) {
             expandableSortableColumn.toggleExpansion();
         }

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/leaderboard/LeaderboardSettings.java

@@ -12,8 +12,8 @@ public class LeaderboardSettings {
     private final List<DetailType> legDetailsToShow;
     private final List<DetailType> raceDetailsToShow;
     private final boolean autoExpandFirstRace;
-    private final long delayBetweenAutoAdvancesInMilliseconds;
-    private final long delayInMilliseconds;
+    private final Long delayBetweenAutoAdvancesInMilliseconds;
+    private final Long delayInMilliseconds;
     
     /**
      * An optional sort column; if <code>null</code>, the leaderboard sorting won't be touched when updating the settings.
@@ -24,7 +24,7 @@ public class LeaderboardSettings {
     
     public LeaderboardSettings(List<DetailType> meneuverDetailsToShow, List<DetailType> legDetailsToShow,
             List<DetailType> raceDetailsToShow, List<RaceInLeaderboardDTO> raceColumnsToShow,
-            boolean autoExpandFirstRace, long delayBetweenAutoAdvancesInMilliseconds, long delayInMilliseconds,
+            boolean autoExpandFirstRace, Long delayBetweenAutoAdvancesInMilliseconds, Long delayInMilliseconds,
             SortableColumn<LeaderboardRowDTO, ?> sortByColumn, boolean sortAscending) {
         this.legDetailsToShow = legDetailsToShow;
         this.raceDetailsToShow = raceDetailsToShow;
@@ -61,11 +61,18 @@ public class LeaderboardSettings {
         return autoExpandFirstRace;
     }
 
-    public long getDelayBetweenAutoAdvancesInMilliseconds() {
+    /**
+     * @return if <code>null</code>, leave refresh interval alone (don't change in
+     *         {@link LeaderboardPanel#updateSettings(LeaderboardSettings)}
+     */
+    public Long getDelayBetweenAutoAdvancesInMilliseconds() {
         return delayBetweenAutoAdvancesInMilliseconds;
     }
 
-    public long getDelayInMilliseconds() {
+    /**
+     * @return if <code>null</code>, leave delay alone (don't change in {@link LeaderboardPanel#updateSettings(LeaderboardSettings)}
+     */
+    public Long getDelayInMilliseconds() {
         return delayInMilliseconds;
     }
 

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/leaderboard/LeaderboardSettingsFactory.java

@@ -36,7 +36,7 @@ public class LeaderboardSettingsFactory {
                 raceDetails.add(DetailType.NUMBER_OF_MANEUVERS);
                 settings = new LeaderboardSettings(maneuverDetails, legDetails, raceDetails,
                         /* don't change raceColumns */ null, true,
-                        /* refresh interval */ 3000l, /* delay to live */ 5000l,
+                        /* refresh interval */ null, /* delay to live */ null,
                         /* sort by column */ null, /* ascending */ true);
                 break;
             case Replay: