Add Minute Mile Pace metric

Runners tend to measure speed in minute mile pace and
this is common even if they use metric units.

src/BasicRideMetrics.cpp

@@ -267,6 +267,48 @@ static bool avgSpeedAdded =
     RideMetricFactory::instance().addMetric(
         AvgSpeed(), &(QVector<QString>() << "total_distance"));
 
+//////////////////////////////////////////////////////////////////////////////
+class Pace : public RideMetric {
+    double pace;
+
+    public:
+
+    Pace() : pace(0.0)
+    {
+        setSymbol("pace");
+        setName(tr("Minute Mile Pace"));
+        setType(RideMetric::Average);
+        setMetricUnits(tr("min/mile"));
+        setImperialUnits(tr("min/mile"));
+        setPrecision(1);
+    }
+
+    void compute(const RideFile *, const Zones *, int,
+                 const HrZones *, int,
+                 const QHash<QString,RideMetric*> &deps,
+                 const MainWindow *) {
+
+        AvgSpeed *as = dynamic_cast<AvgSpeed*>(deps.value("average_speed"));
+
+        // divide by zero or stupidly low pace
+        if (as->value(true) > 0.00f) pace = 60.0f / (as->value(true) * MILES_PER_KM); // kph to minutes per mile
+        else pace = 0;
+
+        setValue(pace);
+        setCount(as->count());
+    }
+    RideMetric *clone() const { return new Pace(*this); }
+};
+
+static bool addPace()
+{
+    QVector<QString> deps;
+    deps.append("average_speed");
+    RideMetricFactory::instance().addMetric(Pace(), &deps);
+    return true;
+}
+static bool paceAdded = addPace();
+
 //////////////////////////////////////////////////////////////////////////////
 
 struct AvgPower : public RideMetric {

src/DBAccess.cpp

@@ -45,6 +45,9 @@
 // Revision History
 // Rev Date         Who                What Changed
 //-----------------------------------------------------------------------
+//
+// ******* Prior to version 29 no revision history was maintained *******
+//
 // 29  5th Sep 2011 Mark Liversedge    Added color to the ride fields
 // 30  8th Sep 2011 Mark Liversedge    Metadata 'data' field for data present string
 // 31  22  Nov 2011 Mark Liversedge    Added Average WPK metric
@@ -52,8 +55,9 @@
 // 33  17  Dec 2011 Damien Grauser     Added ResponseIndex and EfficiencyFactor
 // 34  15  Jan 2012 Mark Liversedge    Added Average and Max Temperature and Metric->conversionSum()
 // 35  13  Feb 2012 Mark Liversedge    Max/Avg Cadence adjusted conversion
+// 36  18  Feb 2012 Mark Liversedge    Added Pace (min/mile) and 250m, 500m Pace metrics
 
-static int DBSchemaVersion = 35;
+static int DBSchemaVersion = 36;
 
 DBAccess::DBAccess(MainWindow* main, QDir home) : main(main), home(home)
 {

src/Units.h

@@ -20,15 +20,15 @@
 #define _GC_Units_h 1
 #include "GoldenCheetah.h"
 
-#define KM_PER_MILE 1.609344
-#define MILES_PER_KM 0.62137119
-#define FEET_PER_METER 3.2808399
-#define METERS_PER_FOOT 0.3047999
-#define LB_PER_KG 2.20462262
-#define KG_PER_LB 0.45359237
-#define FEET_LB_PER_NM 0.73756214837
-#define FAHRENHEIT_PER_CENTIGRADE 1.8
-#define FAHRENHEIT_ADD_CENTIGRADE 32
+#define KM_PER_MILE 1.609344f
+#define MILES_PER_KM 0.62137119f
+#define FEET_PER_METER 3.2808399f
+#define METERS_PER_FOOT 0.3047999f
+#define LB_PER_KG 2.20462262f
+#define KG_PER_LB 0.45359237f
+#define FEET_LB_PER_NM 0.73756214837f
+#define FAHRENHEIT_PER_CENTIGRADE 1.8f
+#define FAHRENHEIT_ADD_CENTIGRADE 32.0f
 #define GPS_COORD_TO_STRING 8
 
 #endif // _GC_Units_h