#4117 Improve time step names for Grid Cross plot categorisation

ApplicationCode/Application/Tools/RiaQDateTimeTools.cpp

@@ -338,3 +338,58 @@ QString RiaQDateTimeTools::toStringUsingApplicationLocale(const QDateTime& dt, c
 
     return defaultApplicationLocale.toString(dt, format);
 }
+
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+QString RiaQDateTimeTools::createTimeFormatStringFromDates(const std::vector<QDateTime>& dates)
+{
+    bool hasHoursAndMinutesInTimesteps = false;
+    bool hasSecondsInTimesteps         = false;
+    bool hasMillisecondsInTimesteps    = false;
+
+    for (size_t i = 0; i < dates.size(); i++)
+    {
+        if (dates[i].time().msec() != 0.0)
+        {
+            hasMillisecondsInTimesteps    = true;
+            hasSecondsInTimesteps         = true;
+            hasHoursAndMinutesInTimesteps = true;
+            break;
+        }
+        else if (dates[i].time().second() != 0.0)
+        {
+            hasHoursAndMinutesInTimesteps = true;
+            hasSecondsInTimesteps         = true;
+        }
+        else if (dates[i].time().hour() != 0.0 || dates[i].time().minute() != 0.0)
+        {
+            hasHoursAndMinutesInTimesteps = true;
+        }
+    }
+
+    QString formatString = dateFormatString();
+    if (hasHoursAndMinutesInTimesteps)
+    {
+        formatString += " - hh:mm";
+        if (hasSecondsInTimesteps)
+        {
+            formatString += ":ss";
+            if (hasMillisecondsInTimesteps)
+            {
+                formatString += ".zzz";
+            }
+        }
+    }
+
+    return formatString;
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+QString RiaQDateTimeTools::dateFormatString()
+{
+    return "dd.MMM yyyy";
+}

ApplicationCode/Application/Tools/RiaQDateTimeTools.h

@@ -101,6 +101,9 @@ public:
     // settings on local machine. Required for stable regression testing.
     static QString toStringUsingApplicationLocale(const QDateTime& dt, const QString& format);
 
+    static QString createTimeFormatStringFromDates(const std::vector<QDateTime>& dates);
+    static QString dateFormatString();
+
 private:
     static quint64  secondsInDay();
     static quint64  secondsInYear();