time ruler interactivity

app/common/CMakeLists.txt

@@ -24,5 +24,7 @@ set(OLIVE_SOURCES
   common/qobjectlistcast.h
   common/qtversionabstraction.h
   common/qtversionabstraction.cpp
+  common/timecodefunctions.h
+  common/timecodefunctions.cpp
   PARENT_SCOPE
 )

app/common/timecodefunctions.cpp

@@ -1,2 +1,24 @@
 #include "timecodefunctions.h"
 
+#include <QtMath>
+
+QString padded(int arg, int padding) {
+  return QString("%1").arg(arg, padding, 10, QChar('0'));
+}
+
+QString olive::timestamp_to_timecode(const rational &timestamp)
+{
+  double timestamp_dbl = timestamp.ToDouble();
+
+  int total_seconds = qFloor(timestamp_dbl);
+
+  int hours = total_seconds / 3600;
+  int mins = total_seconds / 60 - hours * 60;
+  int secs = total_seconds - mins * 60;
+  int fraction = qRound((timestamp_dbl - total_seconds) * 1000);
+
+  return QString("%1:%2:%3.%4").arg(padded(hours, 2),
+                                    padded(mins, 2),
+                                    padded(secs, 2),
+                                    padded(fraction, 3));
+}

app/common/timecodefunctions.h

@@ -1,6 +1,14 @@
 #ifndef TIMECODEFUNCTIONS_H
 #define TIMECODEFUNCTIONS_H
 
+#include <QString>
 
+#include "common/rational.h"
+
+namespace olive {
+
+QString timestamp_to_timecode(const rational& timestamp);
+
+}
 
 #endif // TIMECODEFUNCTIONS_H