static ColorRef default_gene_color();
//! return default track color
static ColorRef default_track_color();
static ColorRef default_gene_color();
//! return default track color
static ColorRef default_track_color();
void draw_summarized_track(SeqSpanRef ref, float left, float right);
//! draw a 1/4 width centered track
void draw_narrow_track(SeqSpanRef ref, float left, float right);
void draw_summarized_track(SeqSpanRef ref, float left, float right);
//! draw a 1/4 width centered track
void draw_narrow_track(SeqSpanRef ref, float left, float right);