Merge pull request SORMAS-Foundation#2962 from hzi-braunschweig/2938-Link_event_error_when_no_event_exists_for_case_disease

SORMAS-Foundation#2938 - Link event error when no event exists for case disease

Author: sergiupacurariu

sormas-ui/src/main/java/de/symeda/sormas/ui/caze/eventLink/EventSelectionField.java

@@ -219,7 +219,8 @@ public HorizontalLayout buildWeekAndDateFilter() {
 
 		Button applyButton = ButtonHelper.createButton(Captions.actionApplyDateFilter, null);
 
-		EpiWeekAndDateFilterComponent<DateFilterOption> weekAndDateFilter = new EpiWeekAndDateFilterComponent<>(applyButton, false, false, null, null);
+		EpiWeekAndDateFilterComponent<DateFilterOption> weekAndDateFilter =
+			new EpiWeekAndDateFilterComponent<>(applyButton, false, false, null, null);
 
 		weekAndDateFilter.getWeekFromFilter().setInputPrompt(I18nProperties.getString(Strings.promptEventEpiWeekFrom));
 		weekAndDateFilter.getWeekToFilter().setInputPrompt(I18nProperties.getString(Strings.promptEventEpiWeekTo));
@@ -287,4 +288,8 @@ public HorizontalLayout buildWeekAndDateFilter() {
 
 		return dateFilterRowLayout;
 	}
+
+	public EventSelectionGrid getEventGrid() {
+		return eventGrid;
+	}
 }

sormas-ui/src/main/java/de/symeda/sormas/ui/caze/eventLink/EventSelectionGrid.java

@@ -103,7 +103,11 @@ public void setLazyDataProvider() {
 
 		EventSelectionGrid tempGrid = this;
 		dataProvider.addDataProviderListener((DataProviderListener<EventIndexDto>) dataChangeEvent -> {
-			tempGrid.setHeightByRows(Math.min(tempGrid.getItemCount(), 5));
+			if (tempGrid.getItemCount() > 0) {
+				tempGrid.setHeightByRows(Math.min(tempGrid.getItemCount(), 5));
+			} else {
+				tempGrid.setHeightByRows(1);
+			}
 		});
 	}