add sort by genre

stepmania/Themes/default/metrics.ini

@@ -2303,6 +2303,7 @@ ChoiceBpm=name,BPM;sort,BPM
 ChoicePopularity=name,PLAYERS' BEST;sort,Popularity
 ChoiceTopGrade=name,TOP GRADE;sort,TopGrade
 ChoiceArtist=name,ARTIST;sort,Artist
+ChoiceGenre=name,GENRE;sort,Genre
 ChoiceEasyMeter=name,EASY METER;sort,EasyMeter
 ChoiceMediumMeter=name,MEDIUM METER;sort,MediumMeter
 ChoiceHardMeter=name,HARD METER;sort,HardMeter

stepmania/src/GameConstantsAndTypes.cpp

@@ -106,6 +106,7 @@ static const CString SortOrderNames[NUM_SORT_ORDERS] = {
 	"Popularity",
 	"TopGrade",
 	"Artist",
+	"Genre",
 	"EasyMeter",
 	"MediumMeter",
 	"HardMeter",

stepmania/src/GameConstantsAndTypes.h

@@ -100,6 +100,7 @@ enum SortOrder {
 	SORT_MOST_PLAYED, 
 	SORT_GRADE,
 	SORT_ARTIST,
+	SORT_GENRE,
 	SORT_EASY_METER,
 	SORT_MEDIUM_METER,
 	SORT_HARD_METER,

stepmania/src/MusicWheel.cpp

@@ -62,17 +62,17 @@ ThemeMetric<float>	NUM_WHEEL_ITEMS_TO_DRAW	("MusicWheel","NumWheelItems");
 const int MAX_WHEEL_SOUND_SPEED = 15;
 
 
-static const SortOrder SORT_ORDERS[] =
+static const SortOrder g_SongSortOrders[] =
 {
 	SORT_GROUP, 
 	SORT_TITLE, 
 	SORT_BPM, 
 	SORT_MOST_PLAYED, 
 	SORT_ARTIST,
+	SORT_GENRE,
 };
-// use ARRAYSIZE(SortOrder)
-// Why? -Chris
-
+vector<SortOrder> SONG_SORT_ORDERS( g_SongSortOrders, g_SongSortOrders + ARRAYSIZE(g_SongSortOrders) );
+	
 MusicWheel::MusicWheel() 
 {
 }
@@ -497,6 +497,7 @@ void MusicWheel::BuildWheelItemDatas( vector<WheelItemData> &arrayWheelItemDatas
 	case SORT_MOST_PLAYED:
 	case SORT_GRADE:
 	case SORT_ARTIST:
+	case SORT_GENRE:
 	case SORT_EASY_METER:
 	case SORT_MEDIUM_METER:
 	case SORT_HARD_METER:
@@ -540,6 +541,9 @@ void MusicWheel::BuildWheelItemDatas( vector<WheelItemData> &arrayWheelItemDatas
 		case SORT_ARTIST:
 			SongUtil::SortSongPointerArrayByArtist( arraySongs );
 			break;
+		case SORT_GENRE:
+			SongUtil::SortSongPointerArrayByGenre( arraySongs );
+			break;
 		case SORT_EASY_METER:
 			SongUtil::SortSongPointerArrayByMeter( arraySongs, DIFFICULTY_EASY );
 			break;
@@ -1201,15 +1205,15 @@ bool MusicWheel::NextSort()		// return true if change successful
 
 	// find the index of the current sort
 	int cur = 0;
-	while( cur < int(ARRAYSIZE(SORT_ORDERS)) && SORT_ORDERS[cur] != m_SortOrder )
+	while( cur < int(SONG_SORT_ORDERS.size()) && SONG_SORT_ORDERS[cur] != m_SortOrder )
 		++cur;
 
 	// move to the next sort with wrapping
 	++cur;
-	wrap( cur, ARRAYSIZE(SORT_ORDERS) );
+	wrap( cur, SONG_SORT_ORDERS.size() );
 
 	// apply new sort
-	SortOrder soNew = SORT_ORDERS[cur];
+	SortOrder soNew = SONG_SORT_ORDERS[cur];
 	return ChangeSort( soNew );
 }
 

stepmania/src/SongUtil.cpp

@@ -151,6 +151,16 @@ void SongUtil::SortSongPointerArrayByDisplayArtist( vector<Song*> &arraySongPoin
 	stable_sort( arraySongPointers.begin(), arraySongPointers.end(), CompareSongPointersBySortValueAscending );
 }
 
+static int CompareSongPointersByGenre(const Song *pSong1, const Song *pSong2)
+{
+	return pSong1->m_sGenre < pSong2->m_sGenre;
+}
+
+void SongUtil::SortSongPointerArrayByGenre( vector<Song*> &arraySongPointers )
+{
+	stable_sort( arraySongPointers.begin(), arraySongPointers.end(), CompareSongPointersByGenre );
+}
+
 static int CompareSongPointersByGroup(const Song *pSong1, const Song *pSong2)
 {
 	return pSong1->m_sGroupName < pSong2->m_sGroupName;
@@ -207,7 +217,8 @@ CString SongUtil::GetSectionNameFromSongAndSort( const Song* pSong, SortOrder so
 	{
 	case SORT_PREFERRED:
 		return "";
-	case SORT_GROUP:	
+	case SORT_GROUP:
+		// guaranteed not empty	
 		return pSong->m_sGroupName;
 	case SORT_TITLE:
 	case SORT_ARTIST:	
@@ -230,6 +241,10 @@ CString SongUtil::GetSectionNameFromSongAndSort( const Song* pSong, SortOrder so
 			else
 				return s.Left(1);
 		}
+	case SORT_GENRE:
+		if( !pSong->m_sGenre.empty() )
+			return pSong->m_sGenre;
+		return "N/A";
 	case SORT_BPM:
 		{
 			const int iBPMGroupSize = 20;

stepmania/src/SongUtil.h

@@ -18,6 +18,7 @@ namespace SongUtil
 	void SortSongPointerArrayByGrade( vector<Song*> &arraySongPointers );
 	void SortSongPointerArrayByArtist( vector<Song*> &arraySongPointers );
 	void SortSongPointerArrayByDisplayArtist( vector<Song*> &arraySongPointers );
+	void SortSongPointerArrayByGenre( vector<Song*> &arraySongPointers );
 	void SortSongPointerArrayByGroupAndDifficulty( vector<Song*> &arraySongPointers );
 	void SortSongPointerArrayByGroupAndTitle( vector<Song*> &arraySongPointers );
 	void SortSongPointerArrayByNumPlays( vector<Song*> &arraySongPointers, ProfileSlot slot, bool bDescending );