Fixed ruler scale units

[pulseview.git] / pv / view / ruler.cpp

diff --git a/pv/view/ruler.cpp b/pv/view/ruler.cpp
index 27db2f4e844e2398320f9a944026ec084687c59a..743a11fcb9e5e3e40afdfb782adbad7e85eb8708 100644 (file)
--- a/pv/view/ruler.cpp
+++ b/pv/view/ruler.cpp
@@ -68,6 +68,8 @@ void Ruler::paintEvent(QPaintEvent *event)
        assert(prefix >= 0);
        assert(prefix < countof(SIPrefixes));
 
+       const double multiplier = pow(0.1, prefix * 3 + FirstSIPrefixPower);
+
        const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX,
                Qt::AlignLeft | Qt::AlignTop, "8").height();
 
@@ -96,7 +98,7 @@ void Ruler::paintEvent(QPaintEvent *event)
                        // Draw a major tick
                        QString s;
                        QTextStream ts(&s);
-                       ts << (t / order_decimal) << SIPrefixes[prefix] << "s";
+                       ts << (t * multiplier) << SIPrefixes[prefix] << "s";
                        p.drawText(x, 0, 0, text_height, Qt::AlignCenter |
                                Qt::AlignTop | Qt::TextDontClip, s);
                        p.drawLine(x, text_height, x, height());