Add Observable template.

src/observable.h

@@ -0,0 +1,59 @@
+/* ASEPRITE
+ * Copyright (C) 2001-2012  David Capello
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef OBSERVABLE_H_INCLUDED
+#define OBSERVABLE_H_INCLUDED
+
+#include "observers.h"
+
+template<typename Observer>
+class Observable {
+public:
+
+  void addObserver(Observer* observer) {
+    m_observers.addObserver(observer);
+  }
+
+  void removeObserver(Observer* observer) {
+    m_observers.removeObserver(observer);
+  }
+
+  void notifyObservers(void (Observer::*method)()) {
+    m_observers.notifyObservers(method);
+  }
+
+  template<typename A1>
+  void notifyObservers(void (Observer::*method)(A1), A1 a1) {
+    m_observers.notifyObservers(method, a1);
+  }
+
+  template<typename A1, typename A2>
+  void notifyObservers(void (Observer::*method)(A1, A2), A1 a1, A2 a2) {
+    m_observers.notifyObservers(method, a1, a2);
+  }
+
+  template<typename A1, typename A2, typename A3>
+  void notifyObservers(void (Observer::*method)(A1, A2, A3), A1 a1, A2 a2, A3 a3) {
+    m_observers.notifyObservers(method, a1, a2, a3);
+  }
+
+private:
+  Observers<Observer> m_observers;
+};
+
+#endif  // OBSERVERS_H_INCLUDED

src/observers.h

@@ -41,23 +41,20 @@ public:
 
   Observers() { }
 
-  ~Observers()
-  {
+  ~Observers() {
     disposeAllObservers();
   }
 
   // Adds the observer in the collection. The observer is owned by the
   // collection and will be destroyed calling the T::dispose() member
   // function.
-  void addObserver(observer_type* observer)
-  {
+  void addObserver(observer_type* observer) {
     m_observers.push_back(observer);
   }
 
   // Removes the observer from the collection. After calling this
   // function you own the observer so you have to dispose it.
-  void removeObserver(observer_type* observer)
-  {
+  void removeObserver(observer_type* observer) {
     iterator it = std::find(m_observers.begin(), m_observers.end(), observer);
     if (it != end())
       m_observers.erase(it);
@@ -65,16 +62,14 @@ public:
 
   // Disposes all observers. It's called automatically in the
   // Observers dtor.
-  void disposeAllObservers()
-  {
+  void disposeAllObservers() {
     while (!empty())
       (*begin())->dispose();
 
     m_observers.clear();
   }
 
-  void notifyObservers(void (observer_type::*method)())
-  {
+  void notifyObservers(void (observer_type::*method)()) {
     for (iterator
            it = this->begin(),
            end = this->end(); it != end; ++it) {
@@ -82,13 +77,30 @@ public:
     }
   }
 
-  template<typename Arg1>
-  void notifyObservers(void (observer_type::*method)(Arg1), Arg1 arg1)
-  {
+  template<typename A1>
+  void notifyObservers(void (observer_type::*method)(A1), A1 a1) {
     for (iterator
            it = this->begin(),
            end = this->end(); it != end; ++it) {
-      ((*it)->*method)(arg1);
+      ((*it)->*method)(a1);
+    }
+  }
+
+  template<typename A1, typename A2>
+  void notifyObservers(void (observer_type::*method)(A1, A2), A1 a1, A2 a2) {
+    for (iterator
+           it = this->begin(),
+           end = this->end(); it != end; ++it) {
+      ((*it)->*method)(a1, a2);
+    }
+  }
+
+  template<typename A1, typename A2, typename A3>
+  void notifyObservers(void (observer_type::*method)(A1, A2, A3), A1 a1, A2 a2, A3 a3) {
+    for (iterator
+           it = this->begin(),
+           end = this->end(); it != end; ++it) {
+      ((*it)->*method)(a1, a2, a3);
     }
   }