406740c2dc67f2bb8e217627dcbbe00a204fd594
kate
  Mon Dec 4 15:37:32 2017 -0800
Add support for item color, using Ensembl extension (RGB instead of value).  http://www.ensembl.org/info/website/upload/pairwise.html

diff --git src/hg/hgTracks/longRangeTrack.c src/hg/hgTracks/longRangeTrack.c
index 35b3be1..383c7d0 100644
--- src/hg/hgTracks/longRangeTrack.c
+++ src/hg/hgTracks/longRangeTrack.c
@@ -3,72 +3,86 @@
 #include "hgTracks.h"
 #include "longRange.h"
 
 
 static int longRangeHeight(struct track *tg, enum trackVisibility vis)
 /* calculate height of all the snakes being displayed */
 {
 if ( tg->visibility == tvDense)
     return  tl.fontHeight;
 int min, max, deflt, current; 
 cartTdbFetchMinMaxPixels(cart, tg->tdb, LONG_MINHEIGHT, LONG_MAXHEIGHT, atoi(LONG_DEFHEIGHT),
                                 &min, &max, &deflt, &current);
 return tg->height = current;
 }
 
+static Color longRangeItemColor(struct track *tg, void *item, struct hvGfx *hvg)
+/* Return color to draw a long range item */
+{
+struct longRange *lr = item;
+if (lr->hasColor)
+    {
+    struct rgbColor itemRgb;
+    itemRgb.r = (lr->rgb & 0xff0000) >> 16;
+    itemRgb.g = (lr->rgb & 0xff00) >> 8;
+    itemRgb.b = lr->rgb & 0xff;
+    return hvGfxFindColorIx(hvg, itemRgb.r, itemRgb.g, itemRgb.b);
+    }
+return tg->ixColor;
+}
 
 static void longRangeDraw(struct track *tg, int seqStart, int seqEnd,
         struct hvGfx *hvg, int xOff, int yOff, int width, 
         MgFont *font, Color color, enum trackVisibility vis)
 /* Draw a list of longTabix structures. */
 {
 double scale = scaleForWindow(width, seqStart, seqEnd);
 struct bed *beds = tg->items;
 unsigned int maxWidth;
 struct longRange *longRange;
 char buffer[1024];
 char itemBuf[2048];
 char statusBuf[2048];
 
 safef(buffer, sizeof buffer, "%s.%s", tg->tdb->track, LONG_MINSCORE);
 double minScore = sqlDouble(cartUsualString(cart, buffer, LONG_DEFMINSCORE));
 struct longRange *longRangeList = parseLongTabix(beds, &maxWidth, minScore);
 
 for(longRange=longRangeList; longRange; longRange=longRange->next)
     {
     safef(itemBuf, sizeof itemBuf, "%d", longRange->id);
     safef(statusBuf, sizeof statusBuf, "%g %s:%d %s:%d", longRange->score, longRange->sChrom, longRange->s, longRange->eChrom, longRange->e);
-
+    color = longRangeItemColor(tg, longRange, hvg);
     boolean sOnScreen = (longRange->s >= seqStart) && (longRange->s < seqEnd);
     unsigned sx = 0, ex = 0;
     if (sOnScreen)
         sx = (longRange->s - seqStart) * scale + xOff;
 
     if (differentString(longRange->sChrom, longRange->eChrom))
         {
         if (!sOnScreen)
             continue;
 
         // draw the foot
         int footWidth = scale * (longRange->sw / 2);
-        hvGfxLine(hvg, sx - footWidth, yOff, sx + footWidth, yOff, MG_BLUE);
+        hvGfxLine(hvg, sx - footWidth, yOff, sx + footWidth, yOff, color);
 
         int height = tg->height/2;
         if (tg->visibility == tvDense)
             height = tg->height;
         unsigned yPos = yOff + height;
-        hvGfxLine(hvg, sx, yOff, sx, yPos, MG_BLUE);
+        hvGfxLine(hvg, sx, yOff, sx, yPos, color);
         if (tg->visibility == tvFull)
             {
             mapBoxHgcOrHgGene(hvg, longRange->s, longRange->s, sx - 2, yOff, 4, tg->height/2,
                                    tg->track, itemBuf, statusBuf, NULL, TRUE, NULL);
 
             safef(buffer, sizeof buffer, "%s:%d",  longRange->eChrom, longRange->e);
             hvGfxTextCentered(hvg, sx, yPos + 2, 4, 4, MG_BLUE, font, buffer);
             int width = vgGetFontStringWidth(hvg->vg, font, buffer);
             int height = vgGetFontPixelHeight(hvg->vg, font);
             mapBoxHgcOrHgGene(hvg, longRange->s, longRange->s, sx - width/2, yPos, width, height,
                                    tg->track, itemBuf, statusBuf, NULL, TRUE, NULL);
             }
         }
     else 
         {