//set cur pos in sequence to a specific tick, only if stoppped
public void setCurrentPos(int _ticknum)
{
if (!isPlaying)
{
tickNum = _ticknum;
Tempo tempo = tempoMap.findTempo(tickNum, out tempoPos);
setTempo(tempo);
int tickOfs = _ticknum - curTempo.tick; //num of ticks from prev tempo msg to now
tickTime = (curTempo.time * 10L) + (tickOfs * tickLen); //prev tempo's time (in usec/10) + time of ticks to now
startOffset = tickTime; //the elapsed time since seq start
startTime = DateTime.Now.Ticks - startOffset; //start time is when we would have started playing up to now
Meter meter = meterMap.findMeter(tickNum, out meterPos);
setMeter(meter);
//set cur pos in each track
//find and send most recent patch change message for each track
for (int trackNum = 0; trackNum < trackCount; trackNum++)
{
Track track = seq.tracks[trackNum];
List <Event> events = seq.tracks[trackNum].events;
trackPos[trackNum] = 0;
PatchChangeMessage patchmsg = null;
for (int i = 0; i < events.Count; i++)
{
Event evt = events[i];
if (evt is MessageEvent && (((MessageEvent)evt).msg is PatchChangeMessage))
{
patchmsg = (PatchChangeMessage)((MessageEvent)evt).msg;
}
if (events[i].tick >= _ticknum)
{
break;
}
trackPos[trackNum]++;
}
if (patchmsg != null)
{
track.sendMessage(patchmsg);
}
}
}
}