Fix - mark missed expand in item

If expand do not produce childs - behaves by click as before

Author: linev

modules/gui/HierarchyPainter.mjs

@@ -1615,7 +1615,8 @@ class HierarchyPainter extends BasePainter {
       }
 
       // special feature - all items with '_expand' function are not drawn by click
-      if ((place === 'item') && ('_expand' in hitem) && !evnt.ctrlKey && !evnt.shiftKey) place = kPM;
+      if ((place === 'item') && ('_expand' in hitem) && !hitem._expand_miss && !evnt.ctrlKey && !evnt.shiftKey)
+         place = kPM;
 
       // special case - one should expand item
       if (((place === kPM) && !('_childs' in hitem) && hitem._more) ||
@@ -2615,7 +2616,24 @@ class HierarchyPainter extends BasePainter {
       if (!hitem && d3cont)
          return;
 
+      function doneExpandItem(_item) {
+         if (_item._childs === undefined)
+            _item._expand_miss = true;
+         else {
+            _item._isopen = true;
+            if (_item._parent && !_item._parent._isopen) {
+               _item._parent._isopen = true; // also show parent
+               if (!silent)
+                  hpainter.updateTreeNode(_item._parent);
+            } else if (!silent)
+               hpainter.updateTreeNode(_item, d3cont);
+         }
+         return _item;
+      }
+
       async function doExpandItem(_item, _obj) {
+         delete _item._expand_miss;
+
          if (isStr(_item._expand))
             _item._expand = findFunction(_item._expand);
 
@@ -2646,28 +2664,15 @@ class HierarchyPainter extends BasePainter {
 
          // try to use expand function
          if (_obj && isFunc(_item._expand)) {
-            if (_item._expand(_item, _obj)) {
-               _item._isopen = true;
-               if (_item._parent && !_item._parent._isopen) {
-                  _item._parent._isopen = true; // also show parent
-                  if (!silent)
-                     hpainter.updateTreeNode(_item._parent);
-               } else if (!silent)
-                  hpainter.updateTreeNode(_item, d3cont);
-               return _item;
-            }
+            if (_item._expand(_item, _obj))
+               return doneExpandItem(_item);
          }
 
-         if (_obj && objectHierarchy(_item, _obj)) {
-            _item._isopen = true;
-            if (_item._parent && !_item._parent._isopen) {
-               _item._parent._isopen = true; // also show parent
-               if (!silent) hpainter.updateTreeNode(_item._parent);
-            } else if (!silent)
-               hpainter.updateTreeNode(_item, d3cont);
-            return _item;
-         }
+         if (_obj && objectHierarchy(_item, _obj))
+            return doneExpandItem(_item);
 
+         // mark as expand miss - behaves as normal object
+         _item._expand_miss = true;
          return -1;
       }