Bug 580698 - [HierarchicalTreeLayer] click on non-collapsible row throws

exception

Signed-off-by: Dirk Fauth <dirk.fauth@googlemail.com>

Change-Id: I81462eee805aa02db225113ed29fb81b99fec694

1 files changed, 6 insertions, 1 deletions

diff --git a/org.eclipse.nebula.widgets.nattable.core/src/org/eclipse/nebula/widgets/nattable/hierarchical/HierarchicalTreeLayer.java b/org.eclipse.nebula.widgets.nattable.core/src/org/eclipse/nebula/widgets/nattable/hierarchical/HierarchicalTreeLayer.java
index 0422332b..e98dd06e 100644
--- a/org.eclipse.nebula.widgets.nattable.core/src/org/eclipse/nebula/widgets/nattable/hierarchical/HierarchicalTreeLayer.java
+++ b/org.eclipse.nebula.widgets.nattable.core/src/org/eclipse/nebula/widgets/nattable/hierarchical/HierarchicalTreeLayer.java
@@ -1,5 +1,5 @@
 /*****************************************************************************
- * Copyright (c) 2018, 2020 Dirk Fauth.
+ * Copyright (c) 2018, 2022 Dirk Fauth.
  *
  * This program and the accompanying materials are made
  * available under the terms of the Eclipse Public License 2.0
@@ -1025,6 +1025,11 @@ public class HierarchicalTreeLayer extends AbstractRowHideShowLayer {
     public void expandOrCollapse(int columnIndex, int rowIndex, int toLevel) {
         MutableIntList toProcess = IntLists.mutable.of(getChildIndexes(columnIndex, rowIndex)).sortThis();
 
+        if (toProcess.isEmpty()) {
+            // if there are no children there is nothing to do here
+            return;
+        }
+
         HierarchicalTreeNode coord = new HierarchicalTreeNode(columnIndex, rowIndex, null);
         if (this.collapsedNodes.contains(coord)) {
             this.collapsedNodes.remove(coord);