+ const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX,
+ Qt::AlignLeft | Qt::AlignTop, "8").height();
+
+ // Draw the tick marks
+ p.setPen(Qt::black);
+
+ const double minor_tick_period = tick_period / MinorTickSubdivision;
+ const double first_major_division = floor(_offset / tick_period);
+ const double first_minor_division = ceil(_offset / minor_tick_period);
+ const double t0 = first_major_division * tick_period;
+
+ int division = (int)round(first_minor_division -
+ first_major_division * MinorTickSubdivision);
+ while(1)
+ {
+ const double t = t0 + division * minor_tick_period;
+ const double x = (t - _offset) / _scale + LabelMarginWidth;
+
+ if(x >= width())
+ break;
+
+ if(division % MinorTickSubdivision == 0)
+ {
+ // Draw a major tick
+ QString s;
+ QTextStream ts(&s);
+ ts << (t / order_decimal) << SIPrefixes[prefix] << "s";
+ p.drawText(x, 0, 0, text_height, Qt::AlignCenter | Qt::AlignTop |
+ Qt::TextDontClip, s);
+ p.drawLine(x, text_height, x, RulerHeight);
+ }
+ else
+ {
+ // Draw a minor tick
+ p.drawLine(x, (text_height + RulerHeight) / 2, x, RulerHeight);
+ }
+
+ division++;
+ }