d562eec11447d84b898860e0387ceb52e8652e3f
Merge parents 9a387b5 74b78fd
galt
  Wed Apr 6 12:14:04 2016 -0700
resolved merge conflict

diff --cc src/hg/hgTracks/gtexTracks.c
index ba4d152,391a68c..fedd694
--- src/hg/hgTracks/gtexTracks.c
+++ src/hg/hgTracks/gtexTracks.c
@@@ -1,1112 -1,1119 +1,1123 @@@
  /* GTEx (Genotype Tissue Expression) tracks  */
  
  /* Copyright (C) 2015 The Regents of the University of California 
   * See README in this or parent directory for licensing information. */
  
  #include "common.h"
  #include "hgTracks.h"
  #include "hvGfx.h"
  #include "rainbow.h"
  #include "gtexInfo.h"
  #include "gtexGeneBed.h"
  #include "gtexTissue.h"
  #include "gtexTissueData.h"
  #include "gtexUi.h"
  #include "spaceSaver.h"
  
  struct gtexGeneExtras 
  /* Track info */
      {
      char *version;              /* Suffix to table name, e.g. 'V6' */
      boolean codingOnly;         /* User filter to limit display to coding genes */
      boolean showExons;          /* Show gene model exons */
      double maxMedian;           /* Maximum median rpkm for all tissues */
      boolean isComparison;       /* Comparison of two sample sets (e.g. male/female). */
      boolean isDifference;       /* True if comparison is shown as a single difference graph. 
                                     False if displayed as two graphs, one oriented downward */
      char *graphType;            /* Additional info about graph (e.g. type of comparison graph */
      struct rgbColor *colors;    /* Color palette for tissues */
      boolean doLogTransform;     /* Log10(x+1) */
      struct gtexTissue *tissues; /* Cache tissue names, descriptions */
      struct hash *tissueFilter;  /* For filter. NULL out excluded tissues */
      };
  
  struct gtexGeneInfo
  /* GTEx gene model, names, and expression medians */
      {
      struct gtexGeneInfo *next;  /* Next in singly linked list */
      struct gtexGeneBed *geneBed;/* Gene name, id, type, exp count and medians 
                                          from BED table */
      struct genePred *geneModel; /* Gene structure from model table */
      char *description;          /* Gene description */
      double *medians1;            /* Computed medians */
      double *medians2;            /* Computed medians for comparison (inverse) graph */
      int height;                  /* Item height in pixels */
      };
  
  
  #define MAX_DESC  200
  /***********************************************/
  /* Color gene models using GENCODE conventions */
  
  static struct rgbColor codingColor = {12, 12, 120}; // #0C0C78
  static struct rgbColor nonCodingColor = {0, 100, 0}; // #006400
  static struct rgbColor pseudoColor = {255,51,255}; // #FF33FF
  static struct rgbColor problemColor = {254, 0, 0}; // #FE0000
  static struct rgbColor unknownColor = {1, 1, 1};
  
  static struct statusColors
  /* Color values for gene models */
      {
      Color coding;
      Color nonCoding;
      Color pseudo;
      Color problem;
      Color unknown;
      } statusColors = {0,0,0,0};
  
  
  static void initGeneColors(struct hvGfx *hvg)
  /* Get and cache indexes for color values */
  {
  if (statusColors.coding != 0)
      return;
  statusColors.coding = hvGfxFindColorIx(hvg, codingColor.r, codingColor.g, codingColor.b);
  statusColors.nonCoding = hvGfxFindColorIx(hvg, nonCodingColor.r, nonCodingColor.g, nonCodingColor.b);
  statusColors.pseudo = hvGfxFindColorIx(hvg, pseudoColor.r, pseudoColor.g, pseudoColor.b);
  statusColors.problem = hvGfxFindColorIx(hvg, problemColor.r, problemColor.g, problemColor.b);
  statusColors.unknown = hvGfxFindColorIx(hvg, unknownColor.r, unknownColor.g, unknownColor.b);
  }
  
  static Color getGeneClassColor(struct hvGfx *hvg, struct gtexGeneBed *geneBed)
  /* Find GENCODE color for gene type. */
  {
  initGeneColors(hvg);
  char *geneClass = gtexGeneClass(geneBed);
  if (geneClass == NULL)
      return statusColors.unknown;
  if (sameString(geneClass, "coding"))
      return statusColors.coding;
  if (sameString(geneClass, "nonCoding"))
      return statusColors.nonCoding;
  if (sameString(geneClass, "pseudo"))
      return statusColors.pseudo;
  return statusColors.unknown;
  }
  
  /***********************************************/
  /* Cache tissue info */
  
  struct gtexTissue *getTissues(char *version)
  /* Get and cache tissue metadata from database */
  {
  static struct gtexTissue *gtexTissues = NULL;
  
  if (!gtexTissues)
      gtexTissues = gtexGetTissues(version);
  return gtexTissues;
  }
  
  int getTissueCount(char *version)
  /* Get and cache the number of tissues in GTEx tissue table */
  {
  static int tissueCount = 0;
  
  if (!tissueCount)
      tissueCount = slCount(getTissues(version));
  return tissueCount;
  }
  
  char *getTissueName(int id, char *version)
  /* Get tissue name from id, cacheing */
  {
  static char **tissueNames = NULL;
  struct gtexTissue *tissue;
  int count = getTissueCount(version);
  if (!tissueNames)
      {
      struct gtexTissue *tissues = getTissues(version);
      AllocArray(tissueNames, count);
      for (tissue = tissues; tissue != NULL; tissue = tissue->next)
          tissueNames[tissue->id] = cloneString(tissue->name);
      }
  if (id >= count)
      errAbort("GTEx tissue table problem: can't find id %d\n", id);
  return tissueNames[id];
  }
  
  char *getTissueDescription(int id, char *version)
  /* Get tissue description from id, cacheing */
  {
  static char **tissueDescriptions = NULL;
  struct gtexTissue *tissue;
  int count = getTissueCount(version);
  if (!tissueDescriptions)
      {
      struct gtexTissue *tissues = getTissues(version);
      AllocArray(tissueDescriptions, count);
      for (tissue = tissues; tissue != NULL; tissue = tissue->next)
          tissueDescriptions[tissue->id] = cloneString(tissue->description);
      }
  if (id >= count)
      errAbort("GTEx tissue table problem: can't find id %d\n", id);
  return tissueDescriptions[id];
  }
  
  struct rgbColor *getGtexTissueColors(char *version)
  /* Get RGB colors from tissue table */
  {
  struct gtexTissue *tissues = getTissues(version);
  struct gtexTissue *tissue = NULL;
  int count = slCount(tissues);
  struct rgbColor *colors;
  AllocArray(colors, count);
  int i = 0;
  for (tissue = tissues; tissue != NULL; tissue = tissue->next)
      {
      // TODO: reconcile 
      colors[i] = (struct rgbColor){.r=COLOR_32_BLUE(tissue->color), .g=COLOR_32_GREEN(tissue->color), .b=COLOR_32_RED(tissue->color)};
      //colors[i] = mgColorIxToRgb(NULL, tissue->color);
      i++;
      }
  return colors;
  }
  
  /*****************************************************************/
  /* Load sample data, gene info, and anything else needed to draw */
  
  static struct hash *loadGeneModels(char *table)
  /* Load gene models from table */
  {
  struct sqlConnection *conn = hAllocConn(database);
  struct sqlResult *sr;
  char **row;
  int rowOffset;
  sr = hRangeQuery(conn, table, chromName, winStart, winEnd, NULL, &rowOffset);
  
  struct hash *modelHash = newHash(0);
  struct genePred *model = NULL;
  while ((row = sqlNextRow(sr)) != NULL)
      {
      model = genePredLoad(row+rowOffset);
      hashAdd(modelHash, model->name, model);
      }
  sqlFreeResult(&sr);
  hFreeConn(&conn);
  return modelHash;
  }
  
  static void loadComputedMedians(struct gtexGeneInfo *geneInfo, struct gtexGeneExtras *extras)
  /* Compute medians based on graph type.  Returns a list of 2 for comparison graph types */
  {
  struct gtexGeneBed *geneBed = geneInfo->geneBed;
  int expCount = geneBed->expCount;
  if (extras->isComparison)
      {
      // create two score hashes, one for each sample subset
      struct hash *scoreHash1 = hashNew(0), *scoreHash2 = hashNew(0);
      struct sqlConnection *conn = hAllocConn("hgFixed");
      char query[1024];
      char **row;
      sqlSafef(query, sizeof(query), "select gtexSampleData.sample, gtexDonor.gender, gtexSampleData.tissue, gtexSampleData.score from gtexSampleData, gtexSample, gtexDonor where gtexSampleData.geneId='%s' and gtexSampleData.sample=gtexSample.sampleId and gtexSample.donor=gtexDonor.name", geneBed->geneId);
      struct sqlResult *sr = sqlGetResult(conn, query);
      while ((row = sqlNextRow(sr)) != NULL)
          {
          char gender = *row[1];
          // TODO: generalize for other comparison graphs (this code just for M/F comparison)
          struct hash *scoreHash = ((gender == 'F') ? scoreHash1 : scoreHash2);
          char *tissue = cloneString(row[2]);
          struct slDouble *score = slDoubleNew(sqlDouble(row[3]));
  
          // create hash of lists of scores, keyed by tissue name
          double *tissueScores = hashFindVal(scoreHash, tissue);
          if (tissueScores)
              slAddHead(tissueScores, score);
          else
              hashAdd(scoreHash, tissue, score);
          }
      sqlFreeResult(&sr);
      hFreeConn(&conn);
  
      // get tissue medians for each sample subset
      double *medians1;
      double *medians2;
      AllocArray(medians1, expCount);
      AllocArray(medians2, expCount);
      int i;
      for (i=0; i<geneBed->expCount; i++)
          {
          //medians1[i] = -1, medians2[i] = -1;       // mark missing tissues ?
          struct slDouble *scores;
          scores = hashFindVal(scoreHash1, getTissueName(i, extras->version));
          if (scores)
              medians1[i] = slDoubleMedian(scores);
          scores = hashFindVal(scoreHash2, getTissueName(i, extras->version));
          if (scores)
              medians2[i] = slDoubleMedian(scores);
          }
      if (extras->isDifference)
          {
          for (i=0; i<geneBed->expCount; i++)
              {
              if (medians1[i] >= medians2[i])
                  {
                  medians1[i] -= medians2[i];
                  medians2[i] = 0;
                  }
              else
                  {
                  medians2[i] -= medians1[i];
                  medians1[i] = 0;
                  }
              }
          }
      geneInfo->medians1 = medians1;
      geneInfo->medians2 = medians2;
      }
  }
  
  static int gtexSquishItemHeight()
  /* Height of squished item (request to have it larger than usual) */
  {
  return tl.fontHeight - tl.fontHeight/2;
  }
  
  static int gtexGeneBoxModelHeight()
  /* Height of indicator box drawn under graph to show gene extent */
  {
  long winSize = virtWinBaseCount;
  //FIXME: dupes!!
  #define WIN_MAX_GRAPH 50000
  #define WIN_MED_GRAPH 500000
  
  #define MAX_GENE_BOX_HEIGHT     2
  #define MED_GENE_BOX_HEIGHT     2
  #define MIN_GENE_BOX_HEIGHT     1
  
  if (winSize < WIN_MAX_GRAPH)
      return MAX_GENE_BOX_HEIGHT;
  else if (winSize < WIN_MED_GRAPH)
      return MED_GENE_BOX_HEIGHT;
  else
      return MIN_GENE_BOX_HEIGHT;
  }
  
  static int gtexGeneItemHeight(struct track *tg, void *item);
  
  static void filterTissues(struct track *tg)
  /* Check cart for tissue selection.  NULL out unselected tissues in tissue list */
  {
  struct gtexGeneExtras *extras = (struct gtexGeneExtras *)tg->extraUiData;
  struct gtexTissue *tis = NULL;
  extras->tissues = getTissues(extras->version);
  extras->tissueFilter = hashNew(0);
  if (cartListVarExistsAnyLevel(cart, tg->tdb, FALSE, GTEX_TISSUE_SELECT))
      {
      struct slName *selectedValues = cartOptionalSlNameListClosestToHome(cart, tg->tdb, 
                                                          FALSE, GTEX_TISSUE_SELECT);
      if (selectedValues != NULL)
          {
          struct slName *name;
          for (name = selectedValues; name != NULL; name = name->next)
              hashAdd(extras->tissueFilter, name->name, name->name);
          return;
          }
      }
  /* no filter */
  for (tis = extras->tissues; tis != NULL; tis = tis->next)
      hashAdd(extras->tissueFilter, tis->name, tis->name);
  }
  
  static int filteredTissueCount(struct track *tg)
  /* Count of tissues to display */
  {
  struct gtexGeneExtras *extras = (struct gtexGeneExtras *)tg->extraUiData;
  return hashNumEntries(extras->tissueFilter);
  }
  
  static boolean filterTissue(struct track *tg, char *name)
  /* Does tissue pass filter */
  {
  struct gtexGeneExtras *extras = (struct gtexGeneExtras *)tg->extraUiData;
  return (hashLookup(extras->tissueFilter, name) != NULL);
  }
  
  static int maxTissueForGene(struct gtexGeneBed *geneBed)
  /* Return id of highest expressed tissue for gene, if significantly higher than median.
   * If none are over threshold, return -1 */
  {
  double maxScore = 0.0, expScore;
  double totalScore = 0.0;
  int maxNum = 0, i;
  int expCount = geneBed->expCount;
  for (i=0; i<expCount; i++)
      {
      expScore = geneBed->expScores[i];
      if (expScore > maxScore)
          {
          maxScore = max(maxScore, expScore);
          maxNum = i;
          }
      totalScore += expScore;
      }
  // threshold to consider this gene tissue specific -- a tissue contributes > 10% to 
  // total expression level
  if (totalScore < 1 || maxScore <= totalScore * .1)
      return -1;
  return maxNum;
  }
  
  static Color gtexGeneItemColor(struct track *tg, void *item, struct hvGfx *hvg)
  /* A bit of tissue-specific coloring in squish mode only, on geneBed item */
  {
  struct gtexGeneBed *geneBed = (struct gtexGeneBed *)item;
  int id = maxTissueForGene(geneBed);
  if (id < 0)
      return MG_BLACK;
  struct gtexGeneExtras *extras = (struct gtexGeneExtras *)tg->extraUiData;
  struct rgbColor color = extras->colors[id];
  return hvGfxFindColorIx(hvg, color.r, color.g, color.b);
  }
  
  static void gtexGeneLoadItems(struct track *tg)
  /* Load method for track items */
  {
  if (tg->visibility == tvSquish || tg->limitedVis == tvSquish)
      tg->itemColor = gtexGeneItemColor;
  
  /* Get track UI info */
  struct gtexGeneExtras *extras;
  AllocVar(extras);
  tg->extraUiData = extras;
  
  /* Get version info from track table name */
  extras->version = gtexVersionSuffix(tg->table);
  extras->doLogTransform = cartUsualBooleanClosestToHome(cart, tg->tdb, FALSE, GTEX_LOG_TRANSFORM, 
                                                  GTEX_LOG_TRANSFORM_DEFAULT);
  char *samples = cartUsualStringClosestToHome(cart, tg->tdb, FALSE, 
                                                  GTEX_SAMPLES, GTEX_SAMPLES_DEFAULT);
  extras->graphType = cloneString(samples);
  if (sameString(samples, GTEX_SAMPLES_COMPARE_SEX))
      extras->isComparison = TRUE;
  char *comparison = cartUsualStringClosestToHome(cart, tg->tdb, FALSE, GTEX_COMPARISON_DISPLAY,
                          GTEX_COMPARISON_DEFAULT);
  extras->isDifference = sameString(comparison, GTEX_COMPARISON_DIFF) ? TRUE : FALSE;
  extras->maxMedian = gtexMaxMedianScore(extras->version);
  extras->codingOnly = cartUsualBooleanClosestToHome(cart, tg->tdb, FALSE, GTEX_CODING_GENE_FILTER,
                                                          GTEX_CODING_GENE_FILTER_DEFAULT);
  extras->showExons = cartUsualBooleanClosestToHome(cart, tg->tdb, FALSE, GTEX_SHOW_EXONS,
                                                          GTEX_SHOW_EXONS_DEFAULT);
  /* Get geneModels in range */
  char buf[256];
  char *modelTable = "gtexGeneModel";
  safef(buf, sizeof(buf), "%s%s", modelTable, extras->version ? extras->version: "");
  struct hash *modelHash = loadGeneModels(buf);
  
  /* Get geneBeds (names and all-sample tissue median scores) in range */
  char *filter = getScoreFilterClause(cart, tg->tdb, NULL);
  bedLoadItemWhere(tg, tg->table, filter, (ItemLoader)gtexGeneBedLoad);
  
  /* Create geneInfo items with BED and geneModels */
  struct gtexGeneInfo *geneInfo = NULL, *list = NULL;
  struct gtexGeneBed *geneBed = (struct gtexGeneBed *)tg->items;
  
  /* Load tissue colors: GTEx or rainbow */
  #ifdef COLOR_SCHEME
  char *colorScheme = cartUsualStringClosestToHome(cart, tg->tdb, FALSE, GTEX_COLORS, 
                          GTEX_COLORS_DEFAULT);
  #else
  char *colorScheme = GTEX_COLORS_DEFAULT;
  #endif
  if (sameString(colorScheme, GTEX_COLORS_GTEX))
      {
      extras->colors = getGtexTissueColors(extras->version);
      }
  else
      {
      if (geneBed)
  	{
  	int expCount = geneBed->expCount;
  	extras->colors = getRainbow(&saturatedRainbowAtPos, expCount);
  	}
      }
  filterTissues(tg);
  
  while (geneBed != NULL)
      {
      if (extras->codingOnly && !gtexGeneIsCoding(geneBed))
          {
          // apologies for messy short-circuit
          geneBed = geneBed->next;
          continue;
          }
      AllocVar(geneInfo);
      geneInfo->geneBed = geneBed;
      geneInfo->geneModel = hashFindVal(modelHash, geneBed->geneId); // sometimes this is missing, hash returns NULL. do we check?
      // NOTE: Consider loading all gene descriptions to save queries
      char query[256];
      sqlSafef(query, sizeof(query),
              "select kgXref.description from kgXref where geneSymbol='%s'", geneBed->name);
      struct sqlConnection *conn = hAllocConn(database);
      char *desc = sqlQuickString(conn, query);
      hFreeConn(&conn);
      if (desc)
          {
          // hg38 known genes has extra detail about source; strip it
          char *fromDetail = strstrNoCase(desc, "(from");
          if (fromDetail)
              *fromDetail = 0;
          if (strlen(desc) > MAX_DESC)
              strcpy(desc+MAX_DESC, "...");
          // also strip 'homo sapiens' prefix
          #define SPECIES_PREFIX  "Homo sapiens "
          if (startsWith(SPECIES_PREFIX, desc))
              desc += strlen(SPECIES_PREFIX);
          geneInfo->description = desc;
          }
+     else
+         geneInfo->description = geneInfo->geneBed->name;
      slAddHead(&list, geneInfo);
      geneBed = geneBed->next;
      geneInfo->geneBed->next = NULL;
      if (extras->isComparison && (tg->visibility == tvFull || tg->visibility == tvPack))
          // compute medians based on configuration (comparisons, and later, filters)
          loadComputedMedians(geneInfo, extras);
      geneInfo->height = gtexGeneItemHeight(tg, geneInfo);
      }
  slReverse(&list);
  tg->items = list;
  }
  
  /***********************************************/
  /* Draw */
  
  /* Bargraph layouts for three window sizes */
  #define WIN_MAX_GRAPH 50000
  #define MAX_GRAPH_HEIGHT 175
  #define MAX_BAR_WIDTH 5
  #define MAX_GRAPH_PADDING 2
  
  #define WIN_MED_GRAPH 500000
  #define MED_GRAPH_HEIGHT 100
  #define MED_BAR_WIDTH 3
  #define MED_GRAPH_PADDING 1
  
  #define MIN_GRAPH_HEIGHT 35
  #define MIN_BAR_WIDTH 1
  #define MIN_GRAPH_PADDING 0
  
  #define MARGIN_WIDTH 1
  
  
  static int gtexBarWidth()
  {
  long winSize = virtWinBaseCount;
  if (winSize < WIN_MAX_GRAPH)
      return MAX_BAR_WIDTH;
  else if (winSize < WIN_MED_GRAPH)
      return MED_BAR_WIDTH;
  else
      return MIN_BAR_WIDTH;
  }
  
  static enum trackVisibility gtexGeneModelVis(struct gtexGeneExtras *extras)
  {
  if (!extras->showExons)
      return tvSquish;
  long winSize = virtWinBaseCount;
  if (winSize < WIN_MED_GRAPH && !extras->isComparison)
      return tvPack;
  return tvSquish;
  }
  
  static int gtexGeneModelHeight(struct gtexGeneExtras *extras)
  {
  if (!extras->showExons)
      return gtexGeneBoxModelHeight()+3;
  enum trackVisibility vis = gtexGeneModelVis(extras);
  if (vis == tvSquish)
      return trunc(tl.fontHeight/2) + 1;
  return tl.fontHeight;
  }
  
  static int gtexGraphPadding()
  {
  long winSize = virtWinBaseCount;
  
  if (winSize < WIN_MAX_GRAPH)
      return MAX_GRAPH_PADDING;
  else if (winSize < WIN_MED_GRAPH)
      return MED_GRAPH_PADDING;
  else
      return MIN_GRAPH_PADDING;
  }
  
  static int gtexMaxGraphHeight()
  {
  long winSize = virtWinBaseCount;
  if (winSize < WIN_MAX_GRAPH)
      return MAX_GRAPH_HEIGHT;
  else if (winSize < WIN_MED_GRAPH)
      return MED_GRAPH_HEIGHT;
  else
      return MIN_GRAPH_HEIGHT;
  }
  
  static int gtexGraphWidth(struct track *tg, struct gtexGeneInfo *geneInfo)
  /* Width of GTEx graph in pixels */
  {
  int barWidth = gtexBarWidth();
  int padding = gtexGraphPadding();
  int count = filteredTissueCount(tg);
  int labelWidth = geneInfo->medians2 ? tl.mWidth : 0;
  return (barWidth * count) + (padding * (count-1)) + labelWidth + 2;
  }
  
  static int gtexGraphX(struct gtexGeneBed *gtex)
  /* Locate graph on X, relative to viewport. */
  {
  int start = max(gtex->chromStart, winStart);
  double scale = scaleForWindow(insideWidth, winStart, winEnd);
  int x1 = round((start - winStart) * scale);
  return x1;
  }
  
  static int gtexGeneMargin()
  {
      return 1;
  }
  
  static int valToHeight(double val, double maxVal, int maxHeight, boolean doLogTransform)
  /* Log-scale and convert a value from 0 to maxVal to 0 to maxHeight-1 */
  {
  if (val == 0.0)
      return 0;
  double scaled = 0.0;
  if (doLogTransform)
      scaled = log10(val+1.0) / log10(maxVal+1.0);
  else
      scaled = val/maxVal;
  if (scaled < 0)
      warn("scaled=%f\n", scaled);
  return (scaled * (maxHeight-1));
  }
  
  static int valToClippedHeight(double val, double maxVal, int maxView, int maxHeight, 
                                          boolean doLogTransform)
  /* Convert a value from 0 to maxVal to 0 to maxHeight-1, with clipping, or log transform the value */
  {
  double useVal = val;
  double useMax = maxVal;
  if (!doLogTransform)
      {
      useMax = maxView;
      if (val > maxView)
          useVal = maxView;
      }
  return valToHeight(useVal, useMax, gtexMaxGraphHeight(), doLogTransform);
  }
  
  static int gtexGeneGraphHeight(struct track *tg, struct gtexGeneInfo *geneInfo, boolean doTop)
  /* Determine height in pixels of graph.  This will be the box for tissue with highest expression
     If doTop is false, compute height of bottom graph of comparison */
  {
  struct gtexGeneBed *geneBed = geneInfo->geneBed;
  struct gtexGeneExtras *extras = (struct gtexGeneExtras *)tg->extraUiData;
  int i;
  double maxExp = 0.0;
  int expCount = geneBed->expCount;
  double expScore;
  for (i=0; i<expCount; i++)
      {
      if (!filterTissue(tg, getTissueName(i, extras->version)))
          continue;
      if (doTop)
          expScore = (geneInfo->medians1 ? geneInfo->medians1[i] : geneBed->expScores[i]);
      else
          expScore = geneInfo->medians2[i];
      maxExp = max(maxExp, expScore);
      }
  double viewMax = (double)cartUsualIntClosestToHome(cart, tg->tdb, FALSE, 
                                  GTEX_MAX_LIMIT, GTEX_MAX_LIMIT_DEFAULT);
  double maxMedian = ((struct gtexGeneExtras *)tg->extraUiData)->maxMedian;
  return valToClippedHeight(maxExp, maxMedian, viewMax, gtexMaxGraphHeight(), extras->doLogTransform);
  }
  
  static void drawGraphBox(struct track *tg, struct gtexGeneInfo *geneInfo, struct hvGfx *hvg, int x, int y)
  /* Draw white background for graph */
  {
  Color lighterGray = MAKECOLOR_32(0xF3, 0xF3, 0xF3);
  int width = gtexGraphWidth(tg, geneInfo);
  int height = gtexGeneGraphHeight(tg, geneInfo, TRUE);
  hvGfxOutlinedBox(hvg, x, y-height, width, height, MG_WHITE, lighterGray);
  }
  
  static void drawGraphBase(struct track *tg, struct gtexGeneInfo *geneInfo, struct hvGfx *hvg, int x, int y)
  /* Draw faint line under graph to delineate extent when bars are missing (tissue w/ 0 expression) */
  {
  Color lightGray = MAKECOLOR_32(0xD1, 0xD1, 0xD1);
  int graphWidth = gtexGraphWidth(tg, geneInfo);
  hvGfxBox(hvg, x, y, graphWidth, 1, lightGray);
  }
  
- static void getItemX(int start, int end, int *x1, int *x2)
- /* Return startX, endX based on item coordinates and current window */
- // TODO: Should be using simpleTracks.c scaledBoxToPixelCoords
- {
- int s = max(start, winStart);
- int e = min(end, winEnd);
- double scale = scaleForWindow(insideWidth, winStart, winEnd);
- assert(x1);
- *x1 = round((double)((int)s-winStart)*scale + insideX);
- assert(x2);
- *x2 = round((double)((int)e-winStart)*scale + insideX);
- }
- 
  static void gtexGeneDrawAt(struct track *tg, void *item, struct hvGfx *hvg, int xOff, int y, 
                  double scale, MgFont *font, Color color, enum trackVisibility vis)
  /* Draw tissue expression bar graph over gene model. 
     Optionally, draw a second graph under gene, to compare sample sets */
  {
  struct gtexGeneExtras *extras = (struct gtexGeneExtras *)tg->extraUiData;
  struct gtexGeneInfo *geneInfo = (struct gtexGeneInfo *)item;
  struct gtexGeneBed *geneBed = geneInfo->geneBed;
  if (vis == tvDense)
      {
      bedDrawSimpleAt(tg, geneBed, hvg, xOff, y, scale, font, MG_WHITE, vis);     // color ignored (using grayscale)
      return;
      }
  if (vis == tvSquish)
      {
      Color color = gtexGeneItemColor(tg, geneBed, hvg);
      int height = gtexSquishItemHeight();
      drawScaledBox(hvg, geneBed->chromStart, geneBed->chromEnd, scale, xOff, y, height, color);
      return;
      }
  
  int graphX = gtexGraphX(geneBed);
  if (graphX < 0)
      return;
  
  // draw gene model
  int topGraphHeight = gtexGeneGraphHeight(tg, geneInfo, TRUE);
  topGraphHeight = max(topGraphHeight, tl.fontHeight);
  int yZero = topGraphHeight + y - 1;  // yZero is bottom of graph
- int yGene = yZero + gtexGeneMargin() - 1;
+ int yGene = yZero + gtexGeneMargin();
  int heightPer = tg->heightPer;
- tg->heightPer = gtexGeneModelHeight(extras) + 1;
+ tg->heightPer = gtexGeneModelHeight(extras);
  Color statusColor = getGeneClassColor(hvg, geneBed);
  if (geneInfo->geneModel && extras->showExons)
      {
      struct linkedFeatures *lf = linkedFeaturesFromGenePred(tg, geneInfo->geneModel, FALSE);
      lf->filterColor = statusColor;
-     linkedFeaturesDrawAt(tg, lf, hvg, xOff, yGene, scale, font, color, gtexGeneModelVis(extras));
+     linkedFeaturesDrawAt(tg, lf, hvg, xOff, yGene-1, scale, font, color, gtexGeneModelVis(extras));
      }
  else
      {
      int height = gtexGeneBoxModelHeight();
-     drawScaledBox(hvg, geneBed->chromStart, geneBed->chromEnd, scale, xOff, yGene+2, height, statusColor);
+     drawScaledBox(hvg, geneBed->chromStart, geneBed->chromEnd, scale, xOff, yGene+1, height, statusColor);
      }
  tg->heightPer = heightPer;
  }
  
  static int gtexGeneNonPropPixelWidth(struct track *tg, void *item)
  /* Return end chromosome coordinate of item, including graph */
  {
  struct gtexGeneInfo *geneInfo = (struct gtexGeneInfo *)item;
  int graphWidth = gtexGraphWidth(tg, geneInfo);
  return graphWidth;
  }
  
  static void gtexGeneNonPropDrawAt(struct track *tg, void *item, struct hvGfx *hvg, int xOff, int y,
                  double scale, MgFont *font, Color color, enum trackVisibility vis)
  {
  if (vis != tvFull && vis != tvPack)
      return;
  struct gtexGeneExtras *extras = (struct gtexGeneExtras *)tg->extraUiData;
  struct gtexGeneInfo *geneInfo = (struct gtexGeneInfo *)item;
  struct gtexGeneBed *geneBed = geneInfo->geneBed;
  int topGraphHeight = gtexGeneGraphHeight(tg, geneInfo, TRUE);
  topGraphHeight = max(topGraphHeight, tl.fontHeight);
  int yZero = topGraphHeight + y - 1;  // yZero is bottom of graph
  int yGene = yZero + gtexGeneMargin()-1;
  
  int graphX = gtexGraphX(geneBed);
  int x1 = xOff + graphX;         // x1 is at left of graph
  int keepX = x1;
  drawGraphBase(tg, geneInfo, hvg, keepX, yZero+1);
  drawGraphBox(tg, geneInfo, hvg, keepX, yZero+1);
  
  int startX = x1;
  struct rgbColor lineColor = {.r=0};
  int lineColorIx = hvGfxFindColorIx(hvg, lineColor.r, lineColor.g, lineColor.b);
  int barWidth = gtexBarWidth();
  int graphPadding = gtexGraphPadding();
  char *colorScheme = cartUsualStringClosestToHome(cart, tg->tdb, FALSE, GTEX_COLORS, 
                          GTEX_COLORS_DEFAULT);
  Color labelColor = MG_GRAY;
  Color clipColor = MG_MAGENTA;
  
  // add labels to comparison graphs
  if (geneInfo->medians2)
      {
      hvGfxText(hvg, x1, yZero - tl.fontHeight + 2, labelColor, font, "F");
      hvGfxText(hvg, x1, yZero + gtexGeneModelHeight(extras) + gtexGeneMargin() + 1, 
                  labelColor, font, "M");
      startX = startX + tl.mWidth+2;
      x1 = startX;
      }
  
  // draw bar graph
  double viewMax = (double)cartUsualIntClosestToHome(cart, tg->tdb, FALSE, 
                                  GTEX_MAX_LIMIT, GTEX_MAX_LIMIT_DEFAULT);
  double maxMedian = ((struct gtexGeneExtras *)tg->extraUiData)->maxMedian;
  int i;
  int expCount = geneBed->expCount;
  struct gtexTissue *tis;
  for (i=0, tis=extras->tissues; i<expCount; i++, tis=tis->next)
      {
      if (!filterTissue(tg, tis->name))
          continue;
      struct rgbColor fillColor = extras->colors[i];
      if (barWidth == 1 && sameString(colorScheme, GTEX_COLORS_GTEX))
          {
          // brighten colors a bit so they'll be more visible at this scale
          fillColor = gtexTissueBrightenColor(fillColor);
          }
      int fillColorIx = hvGfxFindColorIx(hvg, fillColor.r, fillColor.g, fillColor.b);
      double expScore = (geneInfo->medians1 ? geneInfo->medians1[i] : geneBed->expScores[i]);
      int height = valToClippedHeight(expScore, maxMedian, viewMax, 
                                          gtexMaxGraphHeight(), extras->doLogTransform);
      if (graphPadding == 0 || sameString(colorScheme, GTEX_COLORS_GTEX))
          hvGfxBox(hvg, x1, yZero-height+1, barWidth, height, fillColorIx);
      else
          hvGfxOutlinedBox(hvg, x1, yZero-height+1, barWidth, height, fillColorIx, lineColorIx);
      // mark clipped bar with magenta tip
      if (!extras->doLogTransform && expScore > viewMax)
          hvGfxBox(hvg, x1, yZero-height+1, barWidth, 2, clipColor);
      x1 = x1 + barWidth + graphPadding;
      }
  
  if (!geneInfo->medians2)
      return;
  
  // draw comparison bar graph (upside down)
  x1 = startX;
  yZero = yGene + gtexGeneModelHeight(extras) + 1; // yZero is at top of graph
  drawGraphBase(tg, geneInfo, hvg, keepX, yZero-1);
  
  for (i=0, tis=extras->tissues; i<expCount; i++, tis=tis->next)
      {
      if (!filterTissue(tg, tis->name))
          continue;
      struct rgbColor fillColor = extras->colors[i];
      if (barWidth == 1 && sameString(colorScheme, GTEX_COLORS_GTEX))
          {
          // brighten colors a bit so they'll be more visible at this scale
          struct hslColor hsl = mgRgbToHsl(fillColor);
          hsl.s = min(1000, hsl.s + 200);
          fillColor = mgHslToRgb(hsl);
          }
      int fillColorIx = hvGfxFindColorIx(hvg, fillColor.r, fillColor.g, fillColor.b);
      double expScore = geneInfo->medians2[i];
      int height = valToClippedHeight(expScore, maxMedian, viewMax, gtexMaxGraphHeight(), 
                                          extras->doLogTransform);
      if (graphPadding == 0 || sameString(colorScheme, GTEX_COLORS_GTEX))
          hvGfxBox(hvg, x1, yZero, barWidth, height, fillColorIx);
      else
          hvGfxOutlinedBox(hvg, x1, yZero, barWidth, height, fillColorIx, lineColorIx);
      // mark clipped bar with magenta tip
      if (!extras->doLogTransform && expScore > viewMax)
          hvGfxBox(hvg, x1, yZero + height-1, barWidth, 2, clipColor);
      x1 = x1 + barWidth + graphPadding;
      }
  }
  
  static int gtexGeneItemHeightOptionalMax(struct track *tg, void *item, boolean isMax)
  {
 +// It seems that this can be called early or late
 +enum trackVisibility vis = tg->visibility;
 +if (tg->limitedVisSet)
 +    vis = tg->limitedVis;
 +
  int height;
 -if (tg->visibility == tvSquish || tg->visibility == tvDense)
 +if (vis == tvSquish || vis == tvDense)
      {
 -    if (tg->visibility == tvSquish)
 +    if (vis == tvSquish)
          {
          tg->lineHeight = gtexSquishItemHeight();
          tg->heightPer = tg->lineHeight;
          }
      height = tgFixedItemHeight(tg, item);
      return height;
      }
  struct gtexGeneExtras *extras = (struct gtexGeneExtras *)tg->extraUiData;
  if (isMax)
      {
      int extra = 0;
      if (((struct gtexGeneExtras *)tg->extraUiData)->isComparison)
          extra = gtexMaxGraphHeight() + 2;
      height= gtexMaxGraphHeight() + gtexGeneMargin() + gtexGeneModelHeight(extras) + extra;
      return height;
      }
  if (item == NULL)
      return 0;
  struct gtexGeneInfo *geneInfo = (struct gtexGeneInfo *)item;
  
  if (geneInfo->height != 0)
      {
      return geneInfo->height;
      }
      int topGraphHeight = gtexGeneGraphHeight(tg, geneInfo, TRUE);
  topGraphHeight = max(topGraphHeight, tl.fontHeight);
  int bottomGraphHeight = 0;
  boolean isComparison = ((struct gtexGeneExtras *)tg->extraUiData)->isComparison;
  if (isComparison)
      {
      bottomGraphHeight = max(gtexGeneGraphHeight(tg, geneInfo, FALSE),
                                  tl.fontHeight) + gtexGeneMargin();
      }
  height = topGraphHeight + bottomGraphHeight + gtexGeneMargin() + 
                  gtexGeneModelHeight(extras);
  return height;
  }
  
  static int gtexGeneMaxHeight(struct track *tg)
  /* Maximum height in pixels of a gene graph */
  {
  return gtexGeneItemHeightOptionalMax(tg, NULL, TRUE);
  }
  
  static int gtexGeneItemHeight(struct track *tg, void *item)
  {
  int height = gtexGeneItemHeightOptionalMax(tg, item, FALSE);
  return height;
  }
  
  static char *tissueExpressionText(struct gtexTissue *tissue, double expScore, 
                                          boolean doLogTransform, char *qualifier)
  /* Construct mouseover text for tissue graph */
  {
  static char buf[128];
  safef(buf, sizeof(buf), "%s (%.1f %s%s%sRPKM)", tissue->description, 
                                  doLogTransform ? log10(expScore+1.0) : expScore,
                                  qualifier != NULL ? qualifier : "",
                                  qualifier != NULL ? " " : "",
                                  doLogTransform ? "log " : "");
  return buf;
  }
  
+ static void getItemX(int start, int end, int *x1, int *x2)
+ /* Return startX, endX based on item coordinates and current window */
+ // Residual (largely replaced by drawScaledBox -- still used by gene model bmap box
+ {
+ int s = max(start, winStart);
+ int e = min(end, winEnd);
+ double scale = scaleForWindow(insideWidth, winStart, winEnd);
+ assert(x1);
+ *x1 = round((double)((int)s-winStart)*scale + insideX);
+ assert(x2);
+ *x2 = round((double)((int)e-winStart)*scale + insideX);
+ }
+ 
+ static int gtexGeneItemStart(struct track *tg, void *item)
+ /* Return end chromosome coordinate of item, including graph */
+ {
+ struct gtexGeneInfo *geneInfo = (struct gtexGeneInfo *)item;
+ struct gtexGeneBed *geneBed = geneInfo->geneBed;
+ return geneBed->chromStart;
+ }
+ 
+ static int gtexGeneItemEnd(struct track *tg, void *item)
+ /* Return end chromosome coordinate of item, including graph */
+ {
+ struct gtexGeneInfo *geneInfo = (struct gtexGeneInfo *)item;
+ struct gtexGeneBed *geneBed = geneInfo->geneBed;
+ double scale = scaleForWindow(insideWidth, winStart, winEnd);
+ int graphWidth = gtexGraphWidth(tg, geneInfo);
+ return max(geneBed->chromEnd, max(winStart, geneBed->chromStart) + graphWidth/scale);
+ }
+ 
  static void gtexGeneMapItem(struct track *tg, struct hvGfx *hvg, void *item, char *itemName, 
                          char *mapItemName, int start, int end, int x, int y, int width, int height)
  /* Create a map box on gene model and label, and one for each tissue (bar in the graph) in
   * pack or full mode.  Just single map for squish/dense modes */
  {
 -if (tg->visibility == tvDense)
 +if (tg->limitedVis == tvDense)
      {
      genericMapItem(tg, hvg, item, itemName, itemName, start, end, x, y, width, height);
      return;
      }
  struct gtexGeneInfo *geneInfo = item;
  struct gtexGeneBed *geneBed = geneInfo->geneBed;
  struct gtexGeneExtras *extras = (struct gtexGeneExtras *)tg->extraUiData;
+ int geneStart = geneBed->chromStart;
+ int geneEnd = geneBed->chromEnd;
 -if (tg->visibility == tvSquish)
 +if (tg->limitedVis == tvSquish)
      {
      int tisId = maxTissueForGene(geneBed);
      char *maxTissue = "";
      if (tisId > 1)
          maxTissue = getTissueDescription(tisId, extras->version);
      char buf[128];
      safef(buf, sizeof buf, "%s %s", geneBed->name, maxTissue);
      int x1, x2;
-     getItemX(geneBed->chromStart, geneBed->chromEnd, &x1, &x2);
-     int width = x2-x1;
-     mapBoxHc(hvg, geneBed->chromStart, geneBed->chromEnd, x1, y, width, height, 
-                 tg->track, mapItemName, buf);
+     getItemX(geneStart, geneEnd, &x1, &x2);
+     int width = max(1, x2-x1);
+     mapBoxHc(hvg, geneStart, geneEnd, x1, y, width, height, 
+                  tg->track, mapItemName, buf);
      return;
      }
  int topGraphHeight = gtexGeneGraphHeight(tg, geneInfo, TRUE);
  topGraphHeight = max(topGraphHeight, tl.fontHeight);        // label
  int yZero = topGraphHeight + y - 1;  // yZero is bottom of graph
- //int yGene = yZero + gtexGeneMargin() - 1;
  int x1 = insideX;
  
  
  // add maps to tissue bars in expresion graph
  struct gtexTissue *tissues = getTissues(extras->version);
  struct gtexTissue *tissue = NULL;
  int barWidth = gtexBarWidth();
  int padding = gtexGraphPadding();
  double maxMedian = ((struct gtexGeneExtras *)tg->extraUiData)->maxMedian;
  
  int graphX = gtexGraphX(geneBed);
  if (graphX < 0)
      return;
  
  // x1 is at left of graph
  x1 = insideX + graphX;
  
  if (geneInfo->medians2)
      {
      // skip over labels in comparison graphs
      x1 = x1 + tl.mWidth+ 2;
      }
  int i = 0;
  
  double viewMax = (double)cartUsualIntClosestToHome(cart, tg->tdb, FALSE, 
                                  GTEX_MAX_LIMIT, GTEX_MAX_LIMIT_DEFAULT);
  for (tissue = tissues; tissue != NULL; tissue = tissue->next, i++)
      {
      if (!filterTissue(tg, tissue->name))
          continue;
      double expScore =  (geneInfo->medians1 ? geneInfo->medians1[i] : geneBed->expScores[i]);
      int height = valToClippedHeight(expScore, maxMedian, viewMax, 
                                          gtexMaxGraphHeight(), extras->doLogTransform);
      char *qualifier = NULL;
      if (extras->isComparison && extras->isDifference)
          qualifier = "F-M";
-     mapBoxHc(hvg, start, end, x1, yZero-height, barWidth, height, tg->track, mapItemName,  
+     mapBoxHc(hvg, geneStart, geneEnd, x1, yZero-height, barWidth, height, tg->track, mapItemName,  
                  tissueExpressionText(tissue, expScore, extras->doLogTransform, qualifier));
      // add map box to comparison graph
      if (geneInfo->medians2)
          {
          double expScore = geneInfo->medians2[i];
          int height = valToClippedHeight(expScore, maxMedian, viewMax, 
                                          gtexMaxGraphHeight(), extras->doLogTransform);
          int y = yZero + gtexGeneModelHeight(extras) + gtexGeneMargin();  // y is top of bottom graph
          if (extras->isComparison && extras->isDifference)
              qualifier = "M-F";
-         mapBoxHc(hvg, start, end, x1, y, barWidth, height, tg->track, mapItemName,
+         mapBoxHc(hvg, geneStart, geneEnd, x1, y, barWidth, height, tg->track, mapItemName,
                  tissueExpressionText(tissue, expScore, extras->doLogTransform, qualifier));
          }
      x1 = x1 + barWidth + padding;
      }
  
- // add map box with description to gene model
- // NOTE: this is "under" the tissue map boxes
+ // add map boxes with description to gene model
  if (geneInfo->geneModel && geneInfo->description)
      {
+     // perhaps these are just start, end ?
+     int itemStart = geneInfo->geneModel->txStart;
+     int itemEnd = gtexGeneItemEnd(tg, item);
      int x1, x2;
-     getItemX(geneInfo->geneModel->txStart, geneInfo->geneModel->txEnd, &x1, &x2);
+     getItemX(itemStart, itemEnd, &x1, &x2);
      int w = x2-x1;
      int labelWidth = mgFontStringWidth(tl.font, itemName);
      if (x1-labelWidth <= insideX)
          labelWidth = 0;
-     mapBoxHc(hvg, start, end, x1-labelWidth, y, w+labelWidth, geneInfo->height-3, tg->track, 
-                     mapItemName, geneInfo->description);
-     }
+     // map over label
+     int itemHeight = geneInfo->height;
+     mapBoxHc(hvg, geneStart, geneEnd, x1-labelWidth, y, labelWidth, itemHeight-3, 
+                         tg->track, mapItemName, geneInfo->description);
+     // map over gene model (extending to end of item)
+     int geneModelHeight = gtexGeneModelHeight(extras);
+     mapBoxHc(hvg, geneStart, geneEnd, x1, y+itemHeight-geneModelHeight-3, w, geneModelHeight,
+                         tg->track, mapItemName, geneInfo->description);
+     } 
  }
  
  static char *gtexGeneItemName(struct track *tg, void *item)
  /* Return gene name */
  {
  struct gtexGeneInfo *geneInfo = (struct gtexGeneInfo *)item;
  struct gtexGeneBed *geneBed = geneInfo->geneBed;
  return geneBed->name;
  }
  
  static int gtexGeneHeight(void *item)
  {
  struct gtexGeneInfo *geneInfo = (struct gtexGeneInfo *)item;
  assert(geneInfo->height != 0);
  return geneInfo->height;
  }
  
  static int gtexGeneTotalHeight(struct track *tg, enum trackVisibility vis)
  /* Figure out total height of track. Set in track and also return it */
  {
  int height = 0;
  
 -if (tg->visibility == tvDense)
 +if (vis == tvDense)
      { 
      height = tgFixedTotalHeightOptionalOverflow(tg, vis, tl.fontHeight+1, tl.fontHeight, FALSE);
      }
 -else if (tg->visibility == tvSquish)
 +else if (vis == tvSquish)
      {
      // for visibility, set larger than the usual squish, which is half font height
      height = gtexSquishItemHeight() * 2;  // the squish packer halves this
      height = tgFixedTotalHeightOptionalOverflow(tg, vis, height+1, height, FALSE);
      }
 -else if ((tg->visibility == tvPack) || (tg->visibility == tvFull))
 +else if ((vis == tvPack) || (vis == tvFull))
      {
 -    if (!tg->ss)
 -        {
 -        // layout -- initially as fixed height
 -        int height = gtexGeneMaxHeight(tg);
 -        tgFixedTotalHeightOptionalOverflow(tg, vis, height, height, FALSE); // TODO: allow oflow ?
 -        }
 +    // layout -- initially as fixed height
 +    //int height = gtexGeneMaxHeight(tg);  // TODO KATE
 +    int height = tl.fontHeight;
 +    tgFixedTotalHeightOptionalOverflow(tg, vis, height, height, FALSE);
 +
      // set variable height rows
      if (tg->ss->rowCount != 0)
          {
          if (!tg->ss->rowSizes)
  	    {
  	    // collect the rowSizes data across all windows
  	    assert(currentWindow==windows); // first window
  	    assert(tg->ss->vis == vis); // viz matches, we have the right one
  	    struct spaceSaver *ssHold; 
  	    AllocVar(ssHold);
  	    struct track *tgSave = tg;
  	    for(tg=tgSave; tg; tg=tg->nextWindow)
  		{
  		assert(tgSave->ss->vis == tg->ss->vis); // viz matches, we have the right one
  		spaceSaverSetRowHeights(tg->ss, ssHold, gtexGeneHeight);
  		}
  	    // share the rowSizes data across all windows
  	    for(tg=tgSave; tg; tg=tg->nextWindow)
  		{
  		tg->ss->rowSizes = ssHold->rowSizes;
  		}
  	    tg = tgSave;
  	    }
  	height = spaceSaverGetRowHeightsTotal(tg->ss);
          }
      }
  tg->height = height;
  
  return height;
  }
  
- static int gtexGeneItemStart(struct track *tg, void *item)
- /* Return end chromosome coordinate of item, including graph */
- {
- struct gtexGeneInfo *geneInfo = (struct gtexGeneInfo *)item;
- struct gtexGeneBed *geneBed = geneInfo->geneBed;
- return geneBed->chromStart;
- }
- 
- static int gtexGeneItemEnd(struct track *tg, void *item)
- /* Return end chromosome coordinate of item, including graph */
- {
- struct gtexGeneInfo *geneInfo = (struct gtexGeneInfo *)item;
- struct gtexGeneBed *geneBed = geneInfo->geneBed;
- double scale = scaleForWindow(insideWidth, winStart, winEnd);
- int graphWidth = gtexGraphWidth(tg, geneInfo);
- return max(geneBed->chromEnd, max(winStart, geneBed->chromStart) + graphWidth/scale);
- }
- 
  static void gtexGenePreDrawItems(struct track *tg, int seqStart, int seqEnd,
                                  struct hvGfx *hvg, int xOff, int yOff, int width,
                                  MgFont *font, Color color, enum trackVisibility vis)
  {
  if (vis == tvSquish || vis == tvDense)
      {
      // NonProp routines not relevant to these modes, and they interfere
      // NOTE: they must be installed by gtexGeneMethods() for pack mode
      tg->nonPropDrawItemAt = NULL;
      tg->nonPropPixelWidth = NULL;
      }
  }
  
  void gtexGeneMethods(struct track *tg)
  {
  tg->drawItemAt = gtexGeneDrawAt;
  tg->preDrawItems = gtexGenePreDrawItems;
  tg->loadItems = gtexGeneLoadItems;
  tg->mapItem = gtexGeneMapItem;
  tg->itemName = gtexGeneItemName;
  tg->mapItemName = gtexGeneItemName;
  tg->itemHeight = gtexGeneItemHeight;
  tg->itemStart = gtexGeneItemStart;
  tg->itemEnd = gtexGeneItemEnd;
  tg->totalHeight = gtexGeneTotalHeight;
  tg->nonPropDrawItemAt = gtexGeneNonPropDrawAt;
  tg->nonPropPixelWidth = gtexGeneNonPropPixelWidth;
  }