6d78a8e2d7230272d15508db74169ad20cd76f3f
braney
  Thu Apr 16 12:06:50 2026 -0700
Restrict color override to supported track types; add palette icon; deduplicate type check, refs #20460

Note: palette.png must be installed to htdocs/images/ (new file).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

diff --git src/hg/inc/hui.h src/hg/inc/hui.h
index d0bcad2f7c7..ad891259b38 100644
--- src/hg/inc/hui.h
+++ src/hg/inc/hui.h
@@ -1287,30 +1287,33 @@
 // Filters are expected to follow
 //      {fiterName}: trackDb min or min:max - default value(s);
 //      {filterName}Min or {filterName}: min (user supplied) cart variable;
 //      {filterName}Max: max (user supplied) cart variable;
 //      {filterName}Limits: trackDb allowed range "0.0:10.0" Optional
 //          uses:  defaultLimits: function param if no tdb limits settings found)
 // The 'and' param and dyString in/out allows stringing multiple where clauses together
 
 boolean encodePeakHasCfgUi(struct trackDb *tdb);
 // Confirms that this track has encode Peak cfgUI
 
 void encodePeakCfgUi(struct cart *cart, struct trackDb *tdb, char *name, char *title,
                      boolean boxed);
 // Put up UI for filtering wgEnocde peaks based on score, Pval and Qval
 
+boolean tdbSupportsColorOverride(struct trackDb *tdb);
+/* Return TRUE if this track type supports the color override feature. */
+
 void colorTrackOption(struct cart *cart, char *name, struct trackDb *tdb);
 /* color picker for overriding track color */
 
 void bedScoreCfgUi(char *db, struct cart *cart, struct trackDb *tdb, char *name, char *title, boolean boxed);
 /* Put up bed-specific score controls */
 
 void genePredCfgUi(char *db, struct cart *cart, struct trackDb *tdb, char *name, char *title, boolean boxed);
 // Put up genePred-specific controls
 
 void wigMafCfgUi(struct cart *cart, struct trackDb *tdb,char *name, char *title, boolean boxed, char *db);
 /* UI for maf/wiggle track */
 
 void bamCfgUi(struct cart *cart, struct trackDb *tdb, char *name, char *title, boolean boxed);
 /* BAM: short-read-oriented alignment file format. */