Tied in my recent Android flick gesture addition to a Scroll() function. GameState now has a virtual function OnScroll() call that, by default is a no-op; each game state can choose to override how to respond to flick gestures. I've added one such override in the Deck Editor so that a flick up/down acts like the psp button up/down for scrolling between color filters.

projects/mtg/include/GameApp.h

@@ -89,6 +89,8 @@ public:
     virtual void Pause();
     virtual void Resume();
 
+    virtual void OnScroll(int inXVelocity, int inYVelocity);
+
     void LoadGameStates();
     void SetNextState(int state);
     void DoTransition(int trans, int tostate, float dur = -1, bool animonly = false);

projects/mtg/include/GameState.h

@@ -55,6 +55,10 @@ public:
     virtual void Start(){}
     virtual void End(){}
 
+    virtual void OnScroll(int inXVelocity, int inYVelocity)
+    {
+    }
+
     virtual void Update(float dt) = 0;
     virtual void Render() = 0;
 

projects/mtg/include/GameStateDeckViewer.h

@@ -141,6 +141,8 @@ public:
     int loadDeck(int deckid);
     void LoadDeckStatistics(int deckId);
 
+    void OnScroll(int inXVelocity, int inYVelocity);
+
     void buildEditorMenu();
     virtual void ButtonPressed(int controllerId, int controlId);
 };

projects/mtg/src/GameApp.cpp

@@ -424,6 +424,14 @@ void GameApp::Render()
 
 }
 
+void GameApp::OnScroll(int inXVelocity, int inYVelocity)
+{
+    if (mCurrentState != NULL)
+    {
+        mCurrentState->OnScroll(inXVelocity, inYVelocity);
+    }
+}
+
 void GameApp::SetNextState(int state)
 {
     mNextState = mGameStates[state];

projects/mtg/src/GameStateDeckViewer.cpp

@@ -1668,3 +1668,12 @@ void GameStateDeckViewer::ButtonPressed(int controllerId, int controlId)
     }
 }
 
+void GameStateDeckViewer::OnScroll(int inXVelocity, int inYVelocity)
+{
+    if (abs(inYVelocity) > 300)
+    {
+        bool flickUpwards = (inYVelocity < 0);
+        mEngine->HoldKey_NoRepeat(flickUpwards ? JGE_BTN_DOWN : JGE_BTN_UP);
+
+    }
+}