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-rw-r--r--ingen/Resource.hpp9
1 files changed, 9 insertions, 0 deletions
diff --git a/ingen/Resource.hpp b/ingen/Resource.hpp
index 756419d8..3d6d6cd2 100644
--- a/ingen/Resource.hpp
+++ b/ingen/Resource.hpp
@@ -152,6 +152,15 @@ public:
*/
virtual void on_property(const Raul::URI& uri, const Atom& value) {}
+ /** Hook called whenever a property value is removed.
+ *
+ * If all values of a given key are removed, then value will be the wildcard.
+ *
+ * This can be used by derived classes to implement special behaviour for
+ * particular properties (e.g. ingen:value for ports).
+ */
+ virtual void on_property_removed(const Raul::URI& uri, const Atom& value) {}
+
/** Get the ingen type from a set of Properties.
*
* If some coherent ingen type is found, true is returned and the appropriate