First working implementation of Inputs Mapping

Management of inputs in Control, Management of callbacks creator per input in Source, Saving and Loading in Session, Unified renaming of SourceCallbacks, User interface window for creating and editing input mapping from Keyboard and Numerical keypad, with appropriate Settings.

Source.h

@@ -147,10 +147,12 @@ public:
 
     // add callback to each update
     void call(SourceCallback *callback, bool override = false);
-    void setKeyCallback(int key, SourceCallback *callback);
-    SourceCallback *keyCallback(int key);
-    std::vector<int> callbackKeys();
-    void updateCallbacks(bool *keys_status);
+
+    // callbacks associated to keys
+    void addInputCallback(uint input, SourceCallback *callback);
+    void removeInputCallback(SourceCallback *callback);
+    std::list<SourceCallback *> inputCallbacks(uint input);
+    std::list<uint> callbackInputs();
 
     // update mode
     inline  bool active () const { return active_; }
@@ -321,17 +323,18 @@ protected:
     // callbacks
     std::list<SourceCallback *> update_callbacks_;
     std::mutex access_callbacks_;
-    struct CallbackListener {
-        bool was_pressed_;
+    struct InputCallback {
+        bool active_;
         SourceCallback *model_;
         SourceCallback *reverse_;
-        CallbackListener() {
-            was_pressed_ = false;
+        InputCallback() {
+            active_ = false;
             model_   = nullptr;
             reverse_ = nullptr;
         }
     };
-    std::map<int, CallbackListener> key_callbacks_;
+    std::multimap<uint, InputCallback> input_callbacks_;
+    void updateCallbacks(float dt);
 
     // clones
     CloneList clones_;