patch to fix issue on comment https://github.com/libyui/libyui/pull/70#issuecomment-33688895

Add-SelectedYTreeItems.patch

diff --git a/examples/ManyWidgets.cc b/examples/ManyWidgets.cc
index 252cd3a..3069b0c 100644
--- a/examples/ManyWidgets.cc
+++ b/examples/ManyWidgets.cc
@@ -392,7 +392,6 @@ int main( int argc, char **argv )
     }
   }
 
-  std::string TEST = "Test string";
   frame			= YUI::widgetFactory()->createCheckBoxFrame( hbox, "Tree", false );
   {
     frame->setWeight( YD_HORIZ, 1 );
@@ -424,10 +423,12 @@ int main( int argc, char **argv )
       new YTreeItem( t, "Item 2" );
       new YTreeItem( t, "Item 3" );
       t = new YTreeItem( t, "Item 4" );
+      t->setSelected(true); // selected item
       new YTreeItem( t, "Item 1" );
       auto t2 = new YTreeItem( t, "Item 2" );
-      t2->setSelected(true);
-      new YTreeItem( t, "Item 3" );
+      t2->setSelected(true); // this selection is discarded as it is a children of a selected item
+      t2 = new YTreeItem( t, "Item 3" );
+      t2->setSelected(true); // this selection is discarded as it is a children of a selected item
       
       items.push_back( (t = new YTreeItem( "Item 123456" )) );
       new YTreeItem( t, "Item 1" );
diff --git a/src/YSelectionWidget.cc b/src/YSelectionWidget.cc
index 4d5c5f6..dfd0179 100644
--- a/src/YSelectionWidget.cc
+++ b/src/YSelectionWidget.cc
@@ -188,32 +188,26 @@ void YSelectionWidget::addItem( YItem * item )
 
     if ( priv->enforceSingleSelection )
     {
-        YItem * selectedChild = findSelectedItem( item->childrenBegin(),
-                                                 item->childrenEnd() );
+        YItem* newItemSelected = NULL;
+        if ( item->selected() )
+        {
+           newItemSelected = item;
+        }
+        else 
+        {
+           newItemSelected = findSelectedItem( item->childrenBegin(),
+                                               item->childrenEnd() );
+        }
         
-	if ( item->selected() || selectedChild )
+	if ( newItemSelected )
 	{
-	    YItem * oldSelectedItem = selectedItem();
-
-	    // This looks expensive, but it is not: Even though selectedItem()
-	    // searches the complete item list until it finds a selected item,
-	    // this happens only if a new item is to be inserted that has the
-	    // "selected" flag on. In the normal case, this will only be one
-	    // item.
-	    //
-	    // Only if the calling application does this systematically wrong
-	    // and sets the "selected" flag for ALL items it inserts this will
-	    // be more expensive. But then, this is a bug in that application
-	    // that needs to be fixed.
-
-	    if ( oldSelectedItem)
-	    {
-                if ((selectedChild && oldSelectedItem != selectedChild) || 
-                    (item->selected() && oldSelectedItem != item ) )
-                {
-                  oldSelectedItem->setSelected( false );
-                }
-	    }
+            // This looks expensive, but it is not: Even though deselectAllItems()
+            // searches the complete item list and de select all.
+            //
+            // This prevents the calling application does this systematically wrong
+            // and sets the "selected" flag for more items or children
+            deselectAllItems();
+            newItemSelected->setSelected( true );
 	}