SF.net SVN: openvrml:[4183] trunk

[<br...@us...>]

Revision: 4183
          http://openvrml.svn.sourceforge.net/openvrml/?rev=4183&view=rev
Author:   braden
Date:     2010-08-20 03:58:26 +0000 (Fri, 20 Aug 2010)

Log Message:
-----------
Added an accessor to get the set of listeners listening to an event emitter.

Modified Paths:
--------------
    trunk/ChangeLog
    trunk/src/libopenvrml/openvrml/event.cpp
    trunk/src/libopenvrml/openvrml/event.h

Modified: trunk/ChangeLog
===================================================================
--- trunk/ChangeLog	2010-08-15 05:29:25 UTC (rev 4182)
+++ trunk/ChangeLog	2010-08-20 03:58:26 UTC (rev 4183)
@@ -1,3 +1,16 @@
+2010-08-19 Braden McDaniel  <br...@en...>
+
+	Added an accessor to get the set of listeners listening to an
+	event emitter.
+
+	* src/libopenvrml/openvrml/event.cpp: Added doc-comments for
+	listener accessors.
+	* src/libopenvrml/openvrml/event.h
+	(openvrml::event_emitter::listeners<FieldValue>() const): Added
+	member function template to get (a copy of) the set of listeners.
+	(openvrml::field_value_emitter<FieldValue>::listeners() const):
+	Added member function template to get the set of listeners.
+
 2010-08-15 Braden McDaniel  <br...@en...>
 
 	* configure.ac: Removed reference to ide-projects/Makefile.

Modified: trunk/src/libopenvrml/openvrml/event.cpp
===================================================================
--- trunk/src/libopenvrml/openvrml/event.cpp	2010-08-15 05:29:25 UTC (rev 4182)
+++ trunk/src/libopenvrml/openvrml/event.cpp	2010-08-20 03:58:26 UTC (rev 4183)
@@ -545,6 +545,16 @@
  */
 
 /**
+ * @fn const std::set<field_value_listener<FieldValue> *> event_emitter::listeners() const
+ *
+ * @brief The event listeners currently listening to the emitter.
+ *
+ * @tparam FieldValue   a @link FieldValueConcept Field Value@endlink.
+ *
+ * @return the event listeners currently listening to the emitter.
+ */
+
+/**
  * @fn void openvrml::event_emitter::emit_event<FieldValue>(double timestamp)
  *
  * @brief Emit an event.
@@ -636,6 +646,16 @@
  */
 
 /**
+ * @fn const std::set<field_value_listener<FieldValue> *> field_value_emitter<FieldValue>::listeners() const
+ *
+ * @brief The event listeners currently listening to the emitter.
+ *
+ * @tparam FieldValue   a @link FieldValueConcept Field Value@endlink.
+ *
+ * @return the event listeners currently listening to the emitter.
+ */
+
+/**
  * @typedef openvrml::sfbool_emitter
  *
  * @brief @c sfbool event emitter.

Modified: trunk/src/libopenvrml/openvrml/event.h
===================================================================
--- trunk/src/libopenvrml/openvrml/event.h	2010-08-15 05:29:25 UTC (rev 4182)
+++ trunk/src/libopenvrml/openvrml/event.h	2010-08-20 03:58:26 UTC (rev 4183)
@@ -188,6 +188,10 @@
         explicit event_emitter(const field_value & value) OPENVRML_NOTHROW;
 
         template <typename FieldValue>
+        const std::set<field_value_listener<FieldValue> *> listeners() const
+            OPENVRML_THROW1(std::bad_alloc);
+
+        template <typename FieldValue>
         void emit_event(double timestamp) OPENVRML_THROW1(std::bad_alloc);
 
     private:
@@ -217,6 +221,27 @@
     }
 
     template <typename FieldValue>
+    const std::set<field_value_listener<FieldValue> *>
+    event_emitter::listeners() const
+        OPENVRML_THROW1(std::bad_alloc)
+    {
+        struct cast {
+            field_value_listener<FieldValue> *
+            operator()(event_listener * listener) const OPENVRML_NOTHROW
+            {
+                return boost::polymorphic_downcast<
+                    field_value_listener<FieldValue> *>(listener);
+            }
+        };
+        boost::shared_lock<boost::shared_mutex> lock(this->listeners_mutex_);
+        std::set<field_value_listener<FieldValue> *> result;
+        std::transform(this->listeners_.begin(), this->listeners_.end(),
+                       inserter(result, result.begin()),
+                       cast());
+        return result;
+    }
+
+    template <typename FieldValue>
     void event_emitter::emit_event(const double timestamp)
         OPENVRML_THROW1(std::bad_alloc)
     {
@@ -253,6 +278,9 @@
         bool remove(field_value_listener<FieldValue> & listener)
             OPENVRML_NOTHROW;
 
+        const std::set<field_value_listener<FieldValue> *> listeners() const
+            OPENVRML_THROW1(std::bad_alloc);
+
     private:
         virtual void emit_event(double timestamp)
             OPENVRML_THROW1(std::bad_alloc);
@@ -295,6 +323,14 @@
         return this->event_emitter::template remove<FieldValue>(listener);
     }
 
+    template <typename FieldValue>
+    const std::set<field_value_listener<FieldValue> *>
+    field_value_emitter<FieldValue>::listeners() const
+        OPENVRML_THROW1(std::bad_alloc)
+    {
+        return this->event_emitter::template listeners<FieldValue>();
+    }
+
     typedef field_value_emitter<sfbool> sfbool_emitter;
     typedef field_value_emitter<sfcolor> sfcolor_emitter;
     typedef field_value_emitter<sfcolorrgba> sfcolorrgba_emitter;


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