void draw_annotation(const pv::data::decode::Annotation &a, QPainter &p,
QColor text_colour, int text_height, int left, int right,
double samples_per_pixel, double pixels_offset, int y,
void draw_annotation(const pv::data::decode::Annotation &a, QPainter &p,
QColor text_colour, int text_height, int left, int right,
double samples_per_pixel, double pixels_offset, int y,