timeline: implemented in/out points

app/timeline/timelineworkarea.cpp

@@ -0,0 +1,41 @@
+#include "timelineworkarea.h"
+
+const rational TimelineWorkArea::kResetIn = 0;
+const rational TimelineWorkArea::kResetOut = RATIONAL_MAX;
+
+TimelineWorkArea::TimelineWorkArea(QObject *parent) :
+  QObject(parent)
+{
+}
+
+bool TimelineWorkArea::enabled() const
+{
+  return workarea_enabled_;
+}
+
+void TimelineWorkArea::set_enabled(bool e)
+{
+  workarea_enabled_ = e;
+  emit EnabledChanged(workarea_enabled_);
+}
+
+const TimeRange &TimelineWorkArea::range() const
+{
+  return workarea_range_;
+}
+
+void TimelineWorkArea::set_range(const TimeRange &range)
+{
+  workarea_range_ = range;
+  emit RangeChanged(workarea_range_);
+}
+
+const rational &TimelineWorkArea::in() const
+{
+  return workarea_range_.in();
+}
+
+const rational &TimelineWorkArea::out() const
+{
+  return workarea_range_.out();
+}