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-rw-r--r--Swiften/Base/Listenable.h52
1 files changed, 52 insertions, 0 deletions
diff --git a/Swiften/Base/Listenable.h b/Swiften/Base/Listenable.h
new file mode 100644
index 0000000..445dfd7
--- /dev/null
+++ b/Swiften/Base/Listenable.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2013 Remko Tronçon
+ * Licensed under the GNU General Public License.
+ * See the COPYING file for more information.
+ */
+
+#pragma once
+
+#include <Swiften/Base/API.h>
+#include <boost/bind.hpp>
+#include <algorithm>
+
+namespace Swift {
+ template<typename T>
+ class SWIFTEN_API Listenable {
+ public:
+ void addListener(T* listener) {
+ listeners.push_back(listener);
+ }
+
+ void removeListener(T* listener) {
+ listeners.erase(std::remove(listeners.begin(), listeners.end(), listener), listeners.end());
+ }
+
+ protected:
+ template<typename F>
+ void notifyListeners(F event) {
+ for (typename std::vector<T*>::iterator i = listeners.begin(); i != listeners.end(); ++i) {
+ event(*i);
+ }
+ }
+
+ template<typename F, typename A1>
+ void notifyListeners(F f, const A1& a1) {
+ notifyListeners(boost::bind(f, _1, a1));
+ }
+
+ template<typename F, typename A1, typename A2>
+ void notifyListeners(F f, const A1& a1, const A2& a2) {
+ notifyListeners(boost::bind(f, _1, a1, a2));
+ }
+
+ template<typename F, typename A1, typename A2, typename A3>
+ void notifyListeners(F f, const A1& a1, const A2& a2, const A3& a3) {
+ notifyListeners(boost::bind(f, _1, a1, a2, a3));
+ }
+
+ private:
+ std::vector<T*> listeners;
+ };
+}
+