Extra 5 | Handle default and null selection in grid

amahdy · Jun 1, 2017 · 27a5318 · 27a5318
1 parent f9308f4
commit 27a5318
Showing 1 changed file with 13 additions and 1 deletion.
diff --git a/src/main/java/org/vaadin/stepbystep/MyUI.java b/src/main/java/org/vaadin/stepbystep/MyUI.java
@@ -39,9 +39,15 @@ public class MyUI extends UI {
     protected void init(VaadinRequest vaadinRequest) {
 
         listPersons();
+        selectDefault();
 
         grid.asSingleSelect().addValueChangeListener(evt -> {
-           editorView.setPerson(evt.getValue());
+            Person value = evt.getValue();
+            if(value==null) {
+                selectDefault();
+            }else {
+                editorView.setPerson(value);
+            }
         });
 
         splitPanel.setSizeFull();
@@ -55,6 +61,12 @@ protected void init(VaadinRequest vaadinRequest) {
 
     }
 
+    private void selectDefault() {
+        Person first = service.getFirst();
+        grid.select(first);
+        editorView.setPerson(first);
+    }
+
     private void listPersons() {
         grid.setItems(service.getEntries());
     }