Put the time format function into a separate file.

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

diff --git a/pv/view/ruler.cpp b/pv/view/ruler.cpp
index aec3de979cf5171062df6777e78a42aaf4c74b03..9e29ec294b76786ed3e3e22b7a824be056c71720 100644 (file)
--- a/pv/view/ruler.cpp
+++ b/pv/view/ruler.cpp
@@ -23,13 +23,10 @@
 #include "cursor.h"
 #include "view.h"
 #include "viewport.h"
+#include "pv/util.h"
 
 #include <extdef.h>
 
-#include <assert.h>
-#include <math.h>
-#include <limits.h>
-
 #include <QApplication>
 #include <QMouseEvent>
 #include <QPainter>
@@ -47,10 +44,6 @@ const int Ruler::RulerHeight = 30;
 const int Ruler::MinorTickSubdivision = 4;
 const int Ruler::ScaleUnits[3] = {1, 2, 5};
 
-const QString Ruler::SIPrefixes[9] =
-       {"f", "p", "n", QChar(0x03BC), "m", "", "k", "M", "G"};
-const int Ruler::FirstSIPrefixPower = -15;
-
 const int Ruler::HoverArrowSize = 5;
 
 Ruler::Ruler(View &parent) :
@@ -71,19 +64,6 @@ void Ruler::clear_selection()
        update();
 }
 
-QString Ruler::format_time(double t, unsigned int prefix,
-       unsigned int precision)
-{
-       const double multiplier = pow(10.0,
-               (int)- prefix * 3 - FirstSIPrefixPower);
-
-       QString s;
-       QTextStream ts(&s);
-       ts.setRealNumberPrecision(precision);
-       ts << fixed << forcesign << (t  * multiplier) <<
-               SIPrefixes[prefix] << "s";
-       return s;
-}
 
 QSize Ruler::sizeHint() const
 {
@@ -120,12 +100,10 @@ void Ruler::paintEvent(QPaintEvent*)
                        tick_period = order_decimal * ScaleUnits[unit++];
                } while (tick_period < min_period && unit < countof(ScaleUnits));
 
-               prefix = (order - FirstSIPrefixPower) / 3;
-               assert(prefix < countof(SIPrefixes));
-
+               prefix = (order - pv::util::FirstSIPrefixPower) / 3;
 
                typical_width = p.boundingRect(0, 0, INT_MAX, INT_MAX,
-                       AlignLeft | AlignTop, format_time(_view.offset(),
+                       AlignLeft | AlignTop, pv::util::format_time(_view.offset(),
                        prefix)).width() + MinValueSpacing;
 
                min_width += SpacingIncrement;
@@ -163,7 +141,7 @@ void Ruler::paintEvent(QPaintEvent*)
                        // Draw a major tick
                        p.drawText(x, ValueMargin, 0, text_height,
                                AlignCenter | AlignTop | TextDontClip,
-                               format_time(t, prefix));
+                               pv::util::format_time(t, prefix));
                        p.drawLine(QPointF(x, major_tick_y1),
                                QPointF(x, tick_y2));
                }