timeline hierarchical length signalling

app/widget/timelineview/timelinescaledobject.cpp

@@ -0,0 +1,12 @@
+#include "timelinescaledobject.h"
+
+TimelineScaledObject::TimelineScaledObject() :
+  scale_(1.0)
+{
+
+}
+
+double TimelineScaledObject::TimeToScreenCoord(const rational &time)
+{
+  return time.toDouble() * scale_;
+}