Don't detach and reattach VAbstractSplitPanel child widgets unnecessarily (#11628)

Change-Id: I84da9b786706410b42ae4116be0b0a3da896538b

diff --git a/client/src/com/vaadin/client/ui/VAbstractSplitPanel.java b/client/src/com/vaadin/client/ui/VAbstractSplitPanel.java
index 45c5cb6453311e3d50d44aa2abe26784c5fc3d3e..1cc25c741e8d45b4b97ad39f82619087b04bcf0d 100644 (file)
--- a/client/src/com/vaadin/client/ui/VAbstractSplitPanel.java
+++ b/client/src/com/vaadin/client/ui/VAbstractSplitPanel.java
@@ -499,6 +499,9 @@ public class VAbstractSplitPanel extends ComplexPanel {
 
     /** For internal use only. May be removed or replaced in the future. */
     public void setFirstWidget(Widget w) {
+        if (firstChild == w) {
+            return;
+        }
         if (firstChild != null) {
             firstChild.removeFromParent();
         }
@@ -510,6 +513,9 @@ public class VAbstractSplitPanel extends ComplexPanel {
 
     /** For internal use only. May be removed or replaced in the future. */
     public void setSecondWidget(Widget w) {
+        if (secondChild == w) {
+            return;
+        }
         if (secondChild != null) {
             secondChild.removeFromParent();
         }