hide widgets to make sure they don't get events when they are removed from the...

hide widgets to make sure they don't get events when they are removed from the tree, but have not yet been deleted

Fltk/onelabGroup.cpp

@@ -529,6 +529,7 @@ void onelabGroup::_addParameter(T &p)
 void onelabGroup::_addMenu(const std::string &path, Fl_Callback *callback, void *data)
 {
   Fl_Tree_Item *n = _tree->add(path.c_str());
+  //n->labelsize(FL_NORMAL_SIZE + 4);
   _tree->begin();
   int ww = _baseWidth - (n->depth() + 1) * _indent;
   int hh = n->labelsize() + 4;
@@ -1019,6 +1020,11 @@ void onelabGroup::rebuildTree(bool deleteWidgets)
   _tree->sortorder(FL_TREE_SORT_ASCENDING);
   _tree->selectmode(FL_TREE_SELECT_NONE);
 
+  // hide all the widgets we have added in the tree to make sure they don't get
+  // spurious events (until they are deleted)
+  for(unsigned int i = 0; i < _treeWidgets.size(); i++)
+    _treeWidgets[i]->hide();
+
   // we don't delete widgets everytime the tree is rebuilt to minimize potential
   // race conditions (e.g. during heavy user interaction with autoCheck, with
   // risks to call handle() or focus() on deleted widgets)