Smart groove preview

Sources/VLDocument.h

@@ -21,7 +21,8 @@ enum {
 	kVLPlayAccompaniment = 1,
 	kVLPlayMelody		 = 2,
 	kVLPlayMetronome	 = 4,
-	kVLPlayCountIn		 = 8
+	kVLPlayCountIn		 = 8,
+	kVLPlayGroovePreview = 32768
 };
 
 @interface VLDocument : NSDocument
@@ -46,6 +47,7 @@ enum {
 	VLPDFWindow *		pdfWin;
 	VLKeyValueUndo*		undo;
 	PDFDocument *		printDoc;
+	NSRange				previewRange;
 }
 
 - (VLSong *)	song;
@@ -59,6 +61,7 @@ enum {
 - (void) setTimeNum:(int)num denom:(int)denom inSections:(NSRange)sections;
 - (void) setDivisions:(int)divisions inSections:(NSRange)sections;
 - (void) setGroove:(NSString *)groove inSections:(NSRange)sections; 
+- (void) playWithGroove:(NSString *)groove inSections:(NSRange)sections; 
 
 - (void) setRepeatVolta:(int)repeatVolta;
 
@@ -81,7 +84,6 @@ enum {
 - (void)	   didChangeSong;
 - (void)	   addObserver:(id)observer;
 - (VLLogWindow *)logWin;
-- (void)	   playWithGroove:(NSString *)groove;
 
 @end
 

Sources/VLDocument.mm

@@ -448,13 +448,16 @@
 							[self fileURLWithExtension:@"mid"]]));
 }
 
-- (void) playWithGroove:(NSString *)groove
+- (void) playWithGroove:(NSString *)groove inSections:(NSRange)sections
 {
 	NSString * savedGroove	= songGroove;
-	songGroove				= groove;
 	[validTmpFiles removeObjectForKey:@"mma"]; 
 	[validTmpFiles removeObjectForKey:@"mid"]; 
+	songGroove	   	 = groove;
+	previewRange	 = sections;
+	playElements	|= kVLPlayGroovePreview;
 	[self play:groove];
+	playElements	&= ~kVLPlayGroovePreview;
 	songGroove		 = savedGroove;
 	[validTmpFiles removeObjectForKey:@"mma"]; 
 	[validTmpFiles removeObjectForKey:@"mid"]; 

Sources/VLGrooveController.h

@@ -23,6 +23,7 @@
 	NSDictionary *			fSubStyles;
 	NSArray *				fSubStyleList;
 	NSPredicate *			fSubStyleFilter;
+	VLSheetView *			fView;
 	VLDocument *			fDocument;
 }
 

Sources/VLGrooveController.mm

@@ -23,6 +23,7 @@
 		[[NSPredicate predicateWithFormat:
 			@"!(SELF matches[c] '.*(Intro|End)\\\\d*$')"]
 			retain];
+	fView		= view;
 	fDocument	= [view document];
 
 	[NSApp beginSheet: [self window]
@@ -43,7 +44,7 @@
 - (IBAction) togglePlay:(id)sender
 {
 	if ([sender state])
-		[fDocument playWithGroove:[[fBrowser selectedCellInColumn:1] stringValue]];
+		[fView playWithGroove:[[fBrowser selectedCellInColumn:1] stringValue]];
 	else
 		[fDocument stop:sender];
 }
@@ -57,7 +58,7 @@
 {
 	[fDocument stop:self];
 	if (returnCode == NSAlertFirstButtonReturn)
-		[(VLSheetView *)contextInfo setGroove:[[fBrowser selectedCellInColumn:1] stringValue]];
+		[fView setGroove:[[fBrowser selectedCellInColumn:1] stringValue]];
 		
 	[[self window] orderOut:self];
 }

Sources/VLMMADocument.mm

@@ -17,18 +17,25 @@
 {
 	char		buf[32];
 	NSBundle *	bndl = [NSBundle mainBundle];
-	VLMMAWriter				writer;
-	writer.Visit(*song);
-	const VLProperties & 	prop = song->fProperties.front();
+	VLMMAWriter	writer(playElements & kVLPlayGroovePreview, 
+					   previewRange.location, 
+					   previewRange.location+previewRange.length);
 
+	writer.Visit(*song);
 	std::string	mmaFile = std::string("// Generated by VocalEasel ")
 		+ (const char *)[[bndl objectForInfoDictionaryKey:@"CFBundleVersion"]
 							UTF8String]
-		+ "\n\n"
-		+ "Solo Voice AltoSax\n"
-		+ "Solo Volume fff\n";
+		+ "\n\n";
 	sprintf(buf, "Tempo %d\n", [songTempo intValue]);
 	mmaFile	+= buf;
+	if (playElements & kVLPlayGroovePreview) {
+		//
+		// Override all other flags
+		//
+		mmaFile += "Groove ";
+		mmaFile += [songGroove UTF8String];
+		mmaFile += "\nSolo Off\n";
+	} else {
 		if (playElements & kVLPlayCountIn)
 			switch ([[self songTime] intValue]) {
 			case 0x404:
@@ -44,8 +51,11 @@
 			}
 		if (!(playElements & kVLPlayAccompaniment))
 			mmaFile += "AllTracks Off\nSolo On\n";
-	if (!(playElements & kVLPlayMelody))
+		if (playElements & kVLPlayMelody) 
+			mmaFile += "Solo Voice AltoSax\nSolo Volume fff\n";
+		else 
 			mmaFile += "Solo Off\n";
+	}
 	mmaFile += '\n'+writer.Measures();	
 
 	return [[NSString stringWithUTF8String:mmaFile.c_str()] 

Sources/VLMMAWriter.cpp

@@ -24,6 +24,10 @@ void VLMMAWriter::Visit(VLSong & song)
 
 void VLMMAWriter::VisitMeasure(size_t m, VLProperties & p, VLMeasure & meas) 
 {
+	if (fPreview)
+		if (meas.fPropIdx < fBeginSection || meas.fPropIdx >= fEndSection)
+			return; // Skip this measure
+
 	char buf[64];
 
 	if (p.fKey != fKey) {
@@ -31,7 +35,7 @@ void VLMMAWriter::VisitMeasure(size_t m, VLProperties & p, VLMeasure & meas)
 		sprintf(buf, "KeySig %d%c\n", labs(fKey), fKey>=0 ? '#' : '&');
 		fMeasures += buf;
 	}
-	if (p.fGroove != fGroove) {
+	if (!fPreview && p.fGroove != fGroove) {
 		fGroove    = p.fGroove;
 		fMeasures += "Groove " + fGroove + '\n';
 	}

Sources/VLMMAWriter.h

@@ -12,7 +12,9 @@
 
 class VLMMAWriter: public VLSongVisitor {
 public:
-	VLMMAWriter() {}
+	VLMMAWriter(bool preview, int beginSection, int endSection) 
+		: fPreview(preview), fBeginSection(beginSection), fEndSection(endSection)
+	{}
 
 	virtual void Visit(VLSong & song);
 	virtual void VisitMeasure(size_t m, VLProperties & p, VLMeasure & meas);
@@ -24,6 +26,7 @@ private:
 	std::string		fMeasures;
 
 	VLSong *		fSong;
+	bool			fPreview;
 	bool			fUseSharps;
 	bool			fTied;
 	bool			fInitial;
@@ -32,6 +35,8 @@ private:
 	std::string		fAccum;
 	int				fKey;
 	std::string		fGroove;
+	int				fBeginSection;
+	int				fEndSection;
 };
 
 // Local Variables:

Sources/VLSheetView.h

@@ -128,7 +128,7 @@ enum VLRecalc {
 - (VLRegion) findRegionForEvent:(NSEvent *) event;
 
 - (void) setGroove:(NSString *)groove;
-- (void) setGrooveMenu:(NSString *)groove;
+- (void) playWithGroove:(NSString *)groove;
 
 @end
 

Sources/VLSheetView.mm

@@ -1054,6 +1054,11 @@ static int8_t sSharpAcc[] = {
 	[[self document] setGroove:groove inSections:[self sectionsInSelection]];
 }
 
+- (void)playWithGroove:(NSString *)groove
+{
+	[[self document] playWithGroove:groove inSections:[self sectionsInSelection]];
+}
+
 - (IBAction)editDisplayOptions:(id)sender
 {
 	VLSheetWindow * wc = [[self window] windowController];