/** Return the duration of this staff system. This is the start time
* difference between the first and last measure start time slices in the
* first staff plus the duration of the last measure. (It is assumed that all
* staves in the staff system have the same duration.)
* This is used to compute the screen hotspots of the measure starts.
*/
public Rational getDuration()
{
if (_duration != null)
{
return(_duration);
}
if (getStaffCount() == 0 || getStaff(0).getMeasureStartCount() == 0)
{
// There are no staffs or time slices! This is unexpected. Just return 0.
// DEBUG: maybe this should be handled more gracefully.
_duration = new Rational(0, 1);
return(_duration);
}
Staff staff = getStaff(0);
MeasureStartTimeSlice lastMeasureStart =
staff.getMeasureStart(staff.getMeasureStartCount() - 1);
IntRatio result = new IntRatio(lastMeasureStart.getStartTime());
result.sub(getStartTime());
result.add(lastMeasureStart.getDuration());
_duration = new Rational(result);
return(_duration);
}
/** Return the duration of this measure. If this MeasureStartTimeSlice has
* a following MeasureStartTimeSlice in the Staff, the duration is the start time
* difference of this measure start and the following measure start.
* If no following measure start, the duration of this measure is
* the start time of the last event TimeSlice. Note that this assumes
* the last event TimeSlice has zero duration, but this is reasonable
* since the last event TimeSlice usually just holds a bar line.
*/
public Rational getDuration()
{
if (_duration != null)
{
return(_duration);
}
if ((getIndex() + 1) >= getParentStaff().getMeasureStartCount())
{
// This is the last measure start
if (getTimeSliceCount() == 0)
{
// No time slices, just set duration to zero
_duration = new Rational(0, 1);
}
else
{
// DEBUG: This assumes the event time slices are ordered. Maybe check this.
_duration = getTimeSlice(getTimeSliceCount() - 1).getStartTime();
}
}
else
{
// Compute the start time difference between the next measure and this
// DEBUG: This assumes that the measure start time slices are ordered. Maybe check this.
IntRatio result = new IntRatio
(getParentStaff().getMeasureStart(getIndex() + 1).getStartTime());
result.sub(getStartTime());
_duration = new Rational(result);
}
return(_duration);
}
/** Return the duration of this measure. If this MeasureStartTimeSlice has
* a following MeasureStartTimeSlice in the Staff, the duration is the start time
* difference of this measure start and the following measure start.
* If no following measure start, the duration of this measure is
* the start time of the last event TimeSlice. Note that this assumes
* the last event TimeSlice has zero duration, but this is reasonable
* since the last event TimeSlice usually just holds a bar line.
*/
public Rational getDuration()
{
if (_duration != null)
return _duration;
if ((getIndex() + 1) >= getParentStaff().getMeasureStartCount()) {
// This is the last measure start
if (getTimeSliceCount() == 0)
// No time slices, just set duration to zero
_duration = new Rational(0, 1);
else
// DEBUG: This assumes the event time slices are ordered. Maybe check this.
_duration = getTimeSlice(getTimeSliceCount() - 1).getStartTime();
} else {
// Compute the start time difference between the next measure and this
// DEBUG: This assumes that the measure start time slices are ordered. Maybe check this.
IntRatio result = new IntRatio
(getParentStaff().getMeasureStart(getIndex() + 1).getStartTime());
result.sub(getStartTime());
_duration = new Rational(result);
}
return _duration;
}
/** Return the duration of this staff system. This is the start time
* difference between the first and last measure start time slices in the
* first staff plus the duration of the last measure. (It is assumed that all
* staves in the staff system have the same duration.)
* This is used to compute the screen hotspots of the measure starts.
*/
public Rational getDuration()
{
if (_duration != null)
return _duration;
if (getStaffCount() == 0 || getStaff(0).getMeasureStartCount() == 0) {
// There are no staffs or time slices! This is unexpected. Just return 0.
// DEBUG: maybe this should be handled more gracefully.
_duration = new Rational(0, 1);
return _duration;
}
Staff staff = getStaff(0);
MeasureStartTimeSlice lastMeasureStart =
staff.getMeasureStart(staff.getMeasureStartCount() - 1);
IntRatio result = new IntRatio(lastMeasureStart.getStartTime());
result.sub(getStartTime());
result.add(lastMeasureStart.getDuration());
_duration = new Rational(result);
return _duration;
}
