Use Will's scrolling support to add next phase (scroll up) and interrupt (scroll down) in the duel state.

projects/mtg/include/GameStateDuel.h

@@ -59,6 +59,8 @@ public:
     virtual void Render();
     void initRand(unsigned seed = 0);
 
+    void OnScroll(int inXVelocity, int inYVelocity);
+
     enum ENUM_DUEL_STATE_MENU_ITEM
     {
         MENUITEM_CANCEL = kCancelMenuID,

projects/mtg/src/GameStateDuel.cpp

@@ -855,3 +855,13 @@ void GameStateDuel::ButtonPressed(int controllerId, int controlId)
 
     }
 }
+
+void GameStateDuel::OnScroll(int inXVelocity, int inYVelocity)
+{
+    if (abs(inYVelocity) > 300)
+    {
+        bool flickUpwards = (inYVelocity < 0);
+        mEngine->HoldKey_NoRepeat(flickUpwards ? JGE_BTN_PREV : JGE_BTN_SEC);
+    }
+}
+