First implementation of game logic and control

gamecore.h

@@ -11,6 +11,7 @@
 
 #include <SDL/SDL.h>
 #include "mainevent.h"
+#include "graph.h"
 
 class GameCore : public MainEvent
 {
@@ -21,7 +22,7 @@ class GameCore : public MainEvent
  protected:
     // event handlers
     void on_exit();
-
+    void on_lbutton_down(int x, int y);
 
  private:
     bool init();
@@ -37,6 +38,9 @@ class GameCore : public MainEvent
     // textures to draw
     SDL_Surface* background;
     SDL_Surface* node;
+
+    // data
+    Graph graph;
 };
 
 #endif