491395482b817cfe82cbdef4dd7f8ee0723c1a4a
angie
  Wed Mar 23 21:01:49 2011 -0700
Feature #2822, #2823 (VCF customFactory + track handler):Added a new track type, vcfTabix, with handlers in hgTracks and hgc
and a customFactory.  It is a new bigDataUrl type of track; the
remote VCF file must be compressed and indexed by tabix, so like
BAM a separate index file is required.  If the VCF file has
genotypes, then each sample's two haplotypes are graphed in a
line, with one line per sample.  Otherwise, alleles and counts
(if available) are drawn using Belinda's pgSnp methods.
The source code has to be compiled with USE_TABIX=1 (which is
automatically set for us by common.mk when it finds the local
installation) in order for the CGIs to recognize the track type.

diff --git src/hg/lib/trackDbCustom.c src/hg/lib/trackDbCustom.c
index 5d6fcf3..d1e4436 100644
--- src/hg/lib/trackDbCustom.c
+++ src/hg/lib/trackDbCustom.c
@@ -199,31 +199,32 @@
     }
 }
 
 static boolean packableType(char *type)
 /* Return TRUE if we can pack this type. */
 {
 char *t = cloneString(type);
 char *s = firstWordInLine(t);
 boolean canPack = (sameString("psl", s) || sameString("chain", s) ||
                    sameString("bed", s) || sameString("genePred", s) ||
 		   sameString("bigBed", s) || sameString("makeItems", s) ||
                    sameString("expRatio", s) || sameString("wigMaf", s) ||
 		   sameString("factorSource", s) || sameString("bed5FloatScore", s) ||
 		   sameString("bed6FloatScore", s) || sameString("altGraphX", s) ||
 		   sameString("bam", s) || sameString("bedDetail", s) ||
-		   sameString("bed8Attrs", s) || sameString("gvf", s));
+		   sameString("bed8Attrs", s) || sameString("gvf", s) ||
+		   sameString("vcfTabix", s));
 freeMem(t);
 return canPack;
 }
 
 
 
 void trackDbPolish(struct trackDb *bt)
 /* Fill in missing values with defaults. */
 {
 if (bt->shortLabel == NULL)
     bt->shortLabel = cloneString(bt->track);
 if (bt->longLabel == NULL)
     bt->longLabel = cloneString(bt->shortLabel);
 if (bt->altColorR == 0 && bt->altColorG == 0 && bt->altColorB == 0)
     {