ViewItem: Make drag_release virtual

diff --git a/pv/view/viewitem.hpp b/pv/view/viewitem.hpp
index 82851e5c2685571b0b063d1c2c816a98299f5234..b408ec2f5fbcf5a740b65900003e4329b91a8499 100644 (file)
--- a/pv/view/viewitem.hpp
+++ b/pv/view/viewitem.hpp
@@ -81,7 +81,7 @@ public:
        /**
         * Sets this item into the un-dragged state.
         */
-       void drag_release();
+       virtual void drag_release();
 
        /**
         * Drags the item to a delta relative to the drag point.