X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fview%2Fruler.cpp;h=5dea19474c84714a3f653e8449ff099f0f700625;hp=a2e280b6f2291cd57ac11ce65403fb1dac9fd99b;hb=397c9541a50d9fe88a9877d58e1d149df31eee04;hpb=cef18fc6160f8f5055f2617fbe06eb082c2a7bd5

diff --git a/pv/view/ruler.cpp b/pv/view/ruler.cpp
index a2e280b6..5dea1947 100644
--- a/pv/view/ruler.cpp
+++ b/pv/view/ruler.cpp
@@ -56,7 +56,7 @@ void Ruler::paintEvent(QPaintEvent *event)
 	const int order = (int)floorf(log10f(min_period));
 	const double order_decimal = pow(10, order);
 
-	int unit = 0;
+	unsigned int unit = 0;
 	double tick_period = 0.0f;
 
 	do
@@ -64,11 +64,11 @@ void Ruler::paintEvent(QPaintEvent *event)
 		tick_period = order_decimal * ScaleUnits[unit++];
 	} while(tick_period < min_period && unit < countof(ScaleUnits));
 
-	const int prefix = (order - FirstSIPrefixPower) / 3;
+	const unsigned int prefix = (order - FirstSIPrefixPower) / 3;
 	assert(prefix >= 0);
 	assert(prefix < countof(SIPrefixes));
 
-	const double multiplier = pow(0.1, prefix * 3 + FirstSIPrefixPower);
+	const double multiplier = pow(10.0, - prefix * 3 - FirstSIPrefixPower);
 
 	const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX,
 		Qt::AlignLeft | Qt::AlignTop, "8").height();