+ if (hours || days) {
+ ts << pad_number(hours, use_padding ? 2 : 0) << ":";
+ use_padding = true;
+ }
+
+ if (minutes || hours || days) {
+ ts << pad_number(minutes, use_padding ? 2 : 0);
+ use_padding = true;
+
+ // We're not showing any seconds with a negative precision
+ if (precision >= 0)
+ ts << ":";
+ }
+
+ // precision < 0: Use DD:HH:MM format
+ // precision = 0: Use DD:HH:MM:SS format
+ // precision > 0: Use DD:HH:MM:SS.mmm nnn ppp fff format
+ if (precision >= 0) {
+ ts << pad_number(seconds, use_padding ? 2 : 0);
+
+ const double fraction = fabs(t) - whole_seconds;
+
+ if (precision > 0 && precision < 1000) {
+ QString fs = QString("%1").arg(fraction, -(2 + precision), 'f',
+ precision, QChar('0'));
+
+ ts << ".";
+
+ // Copy all digits, inserting spaces as unit separators
+ for (int i = 1; i <= precision; i++) {
+ // Start at index 2 to skip the "0." at the beginning
+ ts << fs[1 + i];
+
+ if ((i > 0) && (i % 3 == 0))
+ ts << " ";
+ }
+ }
+ }
+
+ return s;
+}
+
+static QString format_time_with_si(double t, QString unit, int prefix,
+ unsigned int precision, bool sign)
+{
+ // The precision is always given without taking the prefix into account
+ // so we need to deduct the number of decimals the prefix might imply
+ const int prefix_order =
+ -(prefix * 3 + pv::util::FirstSIPrefixPower);
+
+ const unsigned int relative_prec =
+ (prefix >= pv::util::FirstSIPrefix) ? precision :
+ std::max((int)(precision - prefix_order), 0);
+
+ return format_si_value(t, unit, prefix, relative_prec, sign);
+}
+
+QString format_time(double t, int prefix, TimeUnit unit,
+ unsigned int precision, double step_size, bool sign)
+{
+ // Make 0 appear as 0, not random +0 or -0
+ if (fabs(t) < MinTimeDelta)
+ return "0";
+
+ // If we have to use samples then we have no alternative formats
+ if (unit == Samples)
+ return format_time_with_si(t, "sa", prefix, precision, sign);
+
+ // View zoomed way out -> low precision (0), high step size (>=60s)
+ // -> DD:HH:MM
+ if ((precision == 0) && (step_size >= 60))
+ return format_time_in_full(t, -1, sign);
+
+ // View in "normal" range -> medium precision, medium step size
+ // -> HH:MM:SS.mmm... or xxxx (si unit) if less than 60 seconds
+ // View zoomed way in -> high precision (>3), low step size (<1s)
+ // -> HH:MM:SS.mmm... or xxxx (si unit) if less than 60 seconds
+ if (abs(t) < 60)
+ return format_time_with_si(t, "s", prefix, precision, sign);
+ else
+ return format_time_in_full(t, precision, sign);
+}
+
+QString format_second(double second)
+{
+ return format_si_value(second, "s", -1, 0, false);