add ranking manual scroll sound

fix weird scrolling if num songs < num lines shown

stepmania/src/ScreenRanking.cpp

@@ -201,6 +201,16 @@ float ScreenRanking::SetPage( const PageToShow &pts )
 	return 0;
 }
 
+void ScreenRankingScroller::DoScroll( int iDir )
+{
+	if( m_ListScoreRowItems.Scroll(iDir) )
+		m_soundChange.Play();
+	else
+		SCREENMAN->PlayInvalidSound();
+}
+
+/////////////////////////////////////////////
+
 ScoreScroller::ScoreScroller()
 {
 	this->DeleteChildrenWhenDone();
@@ -221,17 +231,25 @@ void ScoreScroller::SetStepsType( StepsType st, RageColor color )
 	ShiftSubActors( INT_MAX );
 }
 
-void ScoreScroller::Scroll( int iDir )
+bool ScoreScroller::Scroll( int iDir )
 {
+	if( m_vScoreRowItemData.size() <= m_metricSongScoreRowsToDraw )
+		return false;
+
 	float fDest = GetDestinationItem();
 	float fOldDest = fDest;
 	fDest += iDir;
-	CLAMP( fDest, (m_metricSongScoreRowsToDraw-1)/2.0f, m_vScoreRowItemData.size()-(m_metricSongScoreRowsToDraw-1)/2.0f-1 );
+	float fLowClamp = (m_metricSongScoreRowsToDraw-1)/2.0f;
+	float fHighClamp = m_vScoreRowItemData.size()-(m_metricSongScoreRowsToDraw-1)/2.0f-1;
+	CLAMP( fDest, fLowClamp, fHighClamp );
 	if( fOldDest != fDest )
 	{
-		// TODO: play sound
-		SetDestinationItem( fDest );
 		SetDestinationItem( fDest );
+		return true;
+	}
+	else
+	{
+		return false();
 	}
 }
 
@@ -425,6 +443,8 @@ void ScreenRankingScroller::Init()
 		pts.st = STEPS_TYPES_TO_SHOW.GetValue()[i];
 		m_vPagesToShow.push_back( pts );
 	}
+
+	m_soundChange.Load( THEME->GetPathS(m_sName,"change") );
 }
 
 void ScreenRankingScroller::BeginScreen()

stepmania/src/ScreenRanking.h

@@ -12,6 +12,7 @@
 #include "Difficulty.h"
 #include "ThemeMetric.h"
 #include "CommonMetrics.h"
+#include "RageSound.h"
 
 class Course;
 class Song;
@@ -98,7 +99,7 @@ public:
 		const vector<Difficulty> &DifficultiesToShow,
 		float fItemHeight );
 	void SetStepsType( StepsType st, RageColor color );
-	void Scroll( int iDir );
+	bool Scroll( int iDir );
 	void ScrollTop();
 
 protected:
@@ -140,12 +141,13 @@ public:
 	virtual void Init();
 	virtual void BeginScreen();
 
-	virtual void MenuLeft( const InputEventPlus &input )		{ m_ListScoreRowItems.Scroll(-1); }
-	virtual void MenuRight( const InputEventPlus &input )		{ m_ListScoreRowItems.Scroll(+1); }
-	virtual void MenuUp( const InputEventPlus &input )			{ m_ListScoreRowItems.Scroll(-1); }
-	virtual void MenuDown( const InputEventPlus &input )		{ m_ListScoreRowItems.Scroll(+1); }
+	virtual void MenuLeft( const InputEventPlus &input )	{ DoScroll(-1); }
+	virtual void MenuRight( const InputEventPlus &input )	{ DoScroll(+1); }
+	virtual void MenuUp( const InputEventPlus &input )	{ DoScroll(-1); }
+	virtual void MenuDown( const InputEventPlus &input )	{ DoScroll(+1); }
 
 private:
+	void DoScroll( int iDir );
 	virtual float SetPage( const PageToShow &pts );
 
 	ScoreScroller m_ListScoreRowItems;
@@ -159,6 +161,8 @@ private:
 	ThemeMetric<float>			DIFFICULTY_START_X;
 	ThemeMetric<float>			DIFFICULTY_Y;
 	ThemeMetric<int>			NUM_MOST_RECENT_SCORES_TO_SHOW;
+
+	RageSound	m_soundChange;
 };
 
 static const int NUM_RANKING_LINES = 5;