OSCAR-code/sleepyhead/oximetry.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=8 sts=4 et sw=4 tw=99:
 *
 * Oximetry
 *
 * Copyright (c) 2011-2014 Mark Watkins <jedimark@users.sourceforge.net>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file COPYING in the main directory of the Linux
 * distribution for more details. */

#include <QApplication>
#include <QDebug>
#include <QProgressBar>
#include <QFileDialog>
#include <QMessageBox>
#include <QLabel>
#include <QLocale>
#include <QTimer>
#include <QCalendarWidget>
#include <QTextCharFormat>

#include <qextserialenumerator.h>

#include "oximetry.h"
#include "ui_oximetry.h"
#include "common_gui.h"
#include "SleepLib/loader_plugins/cms50_loader.h"
#include "SleepLib/event.h"
#include "SleepLib/calcs.h"
#include "Graphs/gFooBar.h"
#include "Graphs/gXAxis.h"
#include "Graphs/gSummaryChart.h"
#include "Graphs/gLineChart.h"
#include "Graphs/gYAxis.h"
#include "Graphs/gLineOverlay.h"

#define SERIAL_DEBUG 1


extern QLabel *qstatus2;
#include "mainwindow.h"
extern MainWindow *mainwin;

int lastpulse;
ZSerialOximeter::ZSerialOximeter(QObject *parent, QString oxiname, QString portname,
                               BaudRateType baud, FlowType flow, ParityType parity, DataBitsType databits,
                               StopBitsType stopbits) :
    QObject(parent),
    session(nullptr), pulse(nullptr), spo2(nullptr), plethy(nullptr), m_port(nullptr),
    m_opened(false),
    m_oxiname(oxiname),
    m_portname(portname),
    m_baud(baud),
    m_flow(flow),
    m_parity(parity),
    m_databits(databits),
    m_stopbits(stopbits)
{
    machine = PROFILE.GetMachine(MT_OXIMETER);

    if (!machine) {
        // Create generic Serial Oximeter object..
        CMS50Loader *l = dynamic_cast<CMS50Loader *>(GetLoader("CMS50"));

        if (l) {
            machine = l->CreateMachine(p_profile);
        }

        qDebug() << "Create Oximeter device";
    }

    timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(Timeout()));
    import_mode = false;
    m_mode = SO_WAIT;
}

ZSerialOximeter::~ZSerialOximeter()
{
    if (m_opened) {
        if (m_port) { m_port->close(); }
    }

    disconnect(timer, SIGNAL(timeout()), this, SLOT(Timeout()));
    delete timer;
}

void ZSerialOximeter::Timeout()
{
    qDebug() << "Timeout!";

    if (!import_mode) { emit(liveStopped(session)); }
}

bool ZSerialOximeter::Open(QextSerialPort::QueryMode mode)
{
    if (m_portname.isEmpty()) {
        qDebug() << "Tried to open with empty portname";
        return false;
    }

    qDebug() << "Opening serial port" << m_portname << "in mode" << mode;

    if (m_opened) { // Open already?
        // Just close it
        if (m_port) { m_port->close(); }
    }

    m_portmode = mode;
    m_callbacks = 0;

    m_port = new QextSerialPort(m_portname, m_portmode);
    m_port->setBaudRate(m_baud);
    m_port->setFlowControl(m_flow);
    m_port->setParity(m_parity);
    m_port->setDataBits(m_databits);
    m_port->setStopBits(m_stopbits);

    if (m_port->open(QIODevice::ReadWrite) == true) {
        // if (m_mode==QextSerialPort::EventDriven)
        connect(m_port, SIGNAL(readyRead()), this, SLOT(ReadyRead()));

        //connect(port, SIGNAL(dsrChanged(bool)), this, SLOT(DsrChanged(bool)));
        if (!(m_port->lineStatus() & LS_DSR)) {
            qDebug() << "check device is turned on";
        }

        qDebug() << "listening for data on" << m_port->portName();
        return m_opened = true;
    } else {
        qDebug() << "device failed to open:" << m_port->errorString();
        return m_opened = false;
    }
}

void ZSerialOximeter::Close()
{
    qDebug() << "Closing serial port" << m_portname;

    if (!m_opened) {
        return;
    }

    m_port->flush();
    disconnect(m_port, 0, 0, 0); // SIGNAL(readyRead()), this, SLOT(ReadyRead()));

    if (m_port) {
        m_port->close();
    }

    //if (m_portmode==QextSerialPort::EventDriven)
    m_mode = SO_OFF;
    m_opened = false;
}

void ZSerialOximeter::setPortName(QString portname)
{
    if (m_opened) {
        qDebug() << "Can't change serial PortName settings while port is open!";
        return;
    }

    m_portname = portname;
}

void ZSerialOximeter::setBaudRate(BaudRateType baud)
{
    if (m_opened) {
        qDebug() << "Can't change serial BaudRate settings while port is open!";
        return;
    }

    m_baud = baud;
}

void ZSerialOximeter::setFlowControl(FlowType flow)
{
    if (m_opened) {
        qDebug() << "Can't change serial FlowControl settings while port is open!";
        return;
    }

    m_flow = flow;
}

void ZSerialOximeter::setParity(ParityType parity)
{
    if (m_opened) {
        qDebug() << "Can't change serial Parity settings while port is open!";
        return;
    }

    m_parity = parity;
}

void ZSerialOximeter::setDataBits(DataBitsType databits)
{
    if (m_opened) {
        qDebug() << "Can't change serial DataBit settings while port is open!";
        return;
    }

    m_databits = databits;
}

void ZSerialOximeter::setStopBits(StopBitsType stopbits)
{
    if (m_opened) {
        qDebug() << "Can't change serial StopBit settings while port is open!";
        return;
    }

    m_stopbits = stopbits;
}

void ZSerialOximeter::addPulse(qint64 time, EventDataType pr)
{
    //EventDataType min=0,max=0;
    if (pr > 0) {
        if (lastpr == 0) {
            if (pulse->count() == 0) {
                pulse->setFirst(time);

                if (session->eventlist[OXI_Pulse].size() <= 1) {
                    session->setFirst(OXI_Pulse, time);

                    if (session->first() == 0) {
                        session->set_first(time);
                    }
                }

            } else {
                qDebug() << "Shouldn't happen in addPulse()";
            }
        }

        pulse->AddEvent(time, pr);
        session->setCount(OXI_Pulse, session->count(OXI_Pulse) + 1);
        session->setLast(OXI_Pulse, time);
        session->set_last(time);
    } else {
        if (lastpr != 0) {
            if (pulse->count() > 0) {
                pulse->AddEvent(time, lastpr);
                this->compactToEvent(pulse);
                session->setLast(OXI_Pulse, time);
                pulse = session->AddEventList(OXI_Pulse, EVL_Event);
            }
        }
    }

    lastpr = pr;
    emit(updatePulse(pr));
}

void ZSerialOximeter::addSpO2(qint64 time, EventDataType o2)
{
    //EventDataType min=0,max=0;
    if (o2 > 0) {
        if (lasto2 == 0) {
            if (spo2->count() == 0) {
                spo2->setFirst(time);

                if (session->eventlist[OXI_SPO2].size() <= 1) {
                    session->setFirst(OXI_SPO2, time);

                    if (session->first() == 0) {
                        session->set_first(time);
                    }
                }
            } else {
                qDebug() << "Shouldn't happen in addSpO2()";
            }
        }

        spo2->AddEvent(time, o2);
        session->setCount(OXI_SPO2, session->count(OXI_SPO2) + 1);
        session->setLast(OXI_SPO2, time);
        session->set_last(time);
    } else {
        if (lasto2 != 0) {
            if (spo2->count() > 0) {
                spo2->AddEvent(time, lasto2);
                this->compactToEvent(spo2);
                session->setLast(OXI_SPO2, time);
                spo2 = session->AddEventList(OXI_SPO2, EVL_Event);
            }
        }
    }

    lasto2 = o2;
    emit(updateSpO2(o2));
}

void ZSerialOximeter::addPlethy(qint64 time, EventDataType pleth)
{
    if (!plethy) {
        plethy = new EventList(EVL_Event);
        session->eventlist[OXI_Plethy].push_back(plethy);
        session->setFirst(OXI_Plethy, lasttime);
        plethy->setFirst(lasttime);
    }

    plethy->AddEvent(time, pleth);
    session->setCount(OXI_Plethy, plethy->count()); // update the cache
    session->setMin(OXI_Plethy, plethy->Min());
    session->setMax(OXI_Plethy, plethy->Max());
    session->setLast(OXI_Plethy, time);
    session->set_last(time);
    plethy->setLast(time);
}
void ZSerialOximeter::compactToWaveform(EventList *el)
{
    double rate = double(el->duration()) / double(el->count());
    el->setType(EVL_Waveform);
    el->setRate(rate);
    el->getTime().clear();
}
void ZSerialOximeter::compactToEvent(EventList *el)
{
    if (el->count() < 2) { return; }

    EventList nel(EVL_Waveform);
    EventDataType t = 0, lastt = 0; //el->data(0);
    qint64 ti = 0; //=el->time(0);
    //nel.AddEvent(ti,lastt);
    bool f = false;
    qint64 lasttime = 0;
    EventDataType min = 999, max = 0;

    for (quint32 i = 0; i < el->count(); i++) {
        t = el->data(i);
        ti = el->time(i);
        f = false;

        if (t != 0) {
            if (t != lastt) {
                if (!lasttime) {
                    nel.setFirst(ti);
                }

                nel.AddEvent(ti, t);

                if (t < min) { min = t; }

                if (t > max) { max = t; }

                lasttime = ti;
                f = true;
            }
        } else {
            if (lastt != 0) {
                nel.AddEvent(ti, lastt);
                lasttime = ti;
                f = true;
            }
        }

        lastt = t;
    }

    if (!f) {
        if (t != 0) {
            nel.AddEvent(ti, t);
            lasttime = ti;
        }
    }

    el->setFirst(nel.first());
    el->setLast(nel.last());
    el->setMin(min);
    el->setMax(max);

    el->getData().clear();
    el->getTime().clear();
    el->setCount(nel.count());

    el->getData() = nel.getData();
    el->getTime() = nel.getTime();
}

void ZSerialOximeter::compactAll()
{
    if (!session) { return; }

    QHash<ChannelID, QVector<EventList *> >::iterator i;

    qint64 tminx = 0, tmaxx = 0, minx, maxx;
    EventDataType min, max;

    for (i = session->eventlist.begin(); i != session->eventlist.end(); i++) {
        const ChannelID &code = i.key();
        min = 999, max = 0;
        minx = maxx = 0;

        for (int j = 0; j < i.value().size(); j++) {
            EventList *e = i.value()[j];

            if ((code == OXI_SPO2) || (code == OXI_Pulse)) {
                compactToEvent(e);
            } else if (code == OXI_Plethy) {
                compactToWaveform(e);
            }

            if (min > e->Min()) {
                min = e->Min();
            }

            if (max < e->Max()) {
                max = e->Max();
            }

            if (!minx || (minx > e->first())) {
                minx = e->first();
            }

            if (!maxx || (maxx < e->last())) {
                maxx = e->last();
            }
        }

        if ((code == OXI_SPO2) || (code == OXI_Pulse) || (code == OXI_Plethy)) {
            session->setMin(code, min);
            session->setMax(code, max);

            if (minx != 0) {
                session->setFirst(code, minx);

                if (!tminx || tminx > minx) { tminx = minx; }
            }

            if (maxx != 0) {
                session->setLast(code, maxx);

                if (!tmaxx || tmaxx < max) { tmaxx = maxx; }
            }
        }
    }

    if (tminx > 0) { session->really_set_first(tminx); }

    if (tmaxx > 0) { session->really_set_last(tmaxx); }
}

Session *ZSerialOximeter::createSession(QDateTime date)
{
    if (session) {
        delete session;
    }

    int sid = date.toTime_t();
    lasttime = qint64(sid) * 1000L;
    lasto2 = lastpr = 0;

    session = new Session(machine, sid);
    session->SetChanged(true);

    session->set_first(lasttime);
    pulse = new EventList(EVL_Event);
    spo2 = new EventList(EVL_Event);
    plethy = nullptr;
    session->eventlist[OXI_Pulse].push_back(pulse);
    session->eventlist[OXI_SPO2].push_back(spo2);

    session->setFirst(OXI_Pulse, lasttime);
    session->setFirst(OXI_SPO2, lasttime);

    pulse->setFirst(lasttime);
    spo2->setFirst(lasttime);

    m_callbacks = 0;

    emit(sessionCreated(session));
    return session;
}

bool ZSerialOximeter::startLive()
{
    import_mode = false;
    killTimers();
    m_mode = SO_LIVE;

    lastpr = lasto2 = 0;
    buffer.clear();

    if (!m_opened && !Open(QextSerialPort::EventDriven)) { return false; }

    createSession();

    return true;
}

void ZSerialOximeter::stopLive()
{
    if (timer->isActive()) { timer->stop(); }

    m_mode = SO_WAIT;

    if (session) {
        compactAll();
        calcSPO2Drop(session);
        calcPulseChange(session);
    }
}

CMS50Serial::CMS50Serial(QObject *parent, QString portname = "") :
    ZSerialOximeter(parent, "CMS50", portname, BAUD19200, FLOW_OFF, PAR_ODD, DATA_8, STOP_1)
{
    cms50timer = new QTimer(this);
    cms50timer2 = new QTimer(this);
}

CMS50Serial::~CMS50Serial()
{
    delete cms50timer2;
    delete cms50timer;
}
void CMS50Serial::killTimers()
{
    if (cms50timer->isActive()) {
        cms50timer->stop();
    }

    if (cms50timer2->isActive()) {
        cms50timer2->stop();
    }
}

void CMS50Serial::import_process()
{
    if (!session) {
        qDebug() << "User pushing import too many times in a row?";
        return;
    }

    mainwin->getOximetry()->graphView()->setEmptyText(tr("Processing..."));
    mainwin->getOximetry()->graphView()->redraw();

    qDebug() << "CMS50 import complete. Processing" << data.size() << "bytes";
    unsigned short a, pl, o2, lastpl = 0, lasto2 = 0;
    int i = 0;
    int size = data.size();


    EventList *pulse = (session->eventlist[OXI_Pulse][0]);
    EventList *spo2 = (session->eventlist[OXI_SPO2][0]);

    //    int d=abs(oxitime.secsTo(cpaptime));

    QDateTime seltime = oxitime;

    if (!cpaptime.isNull()) {
        if (QMessageBox::question(mainwin, STR_MessageBox_Question,
                                  tr("Did you remember to start your oximeter recording at exactly the same time you started your CPAP machine?"),
                                  QMessageBox::Yes, QMessageBox::No) == QMessageBox::No) {
            if (!cms50dplus) {
                // Oximeter has a clock.. Hopefully the user remembered to set their clock on the device..
                QMessageBox::information(mainwin, STR_MessageBox_Information,
                                         tr("That's ok, I will use the time provided by your oximeter, however it will sync better next time if you start your oximeter recording at the same time your CPAP machine starts up.")+
                                         "\n\n"+
                                         STR_MessageBox_PleaseNote+": "+tr("If you haven't set your oximeter clock you will have to manually edit this time before saving this oximetry session."),
                                         QMessageBox::Ok);
            } else {
                //CMS50D+, and the user didn't start at the same time.. Kludge it because they likely turned it on around about the same time anyway.
                QMessageBox::information(mainwin, STR_MessageBox_Information,
                                         tr("It looks like your oximeter doesn't provide a valid start time, I'm going to set this oximetry session starting time to the CPAP starting time anyway.")+"\n\n"+
                                         tr("You may have to adjust it manually if you remember the real start time before saving this session.")+"\n\n"+
                                         tr("(Also, did you remember to import todays CPAP data first?)"),
                                         QMessageBox::Ok);
                seltime = cpaptime;
            }
        } else {
            // The best solution.. the user (hopefully) started both devices at the same time, so we pick the cpap sessions start time for optimal sync.
            QMessageBox::information(mainwin, STR_MessageBox_Information,
                                     tr("The most recent CPAP Session time has been selected as the start of your oximetry session.")+"\n\n"+
                                     tr("If you forgot to import todays CPAP data first, go and do that now, then import again from your oximeter."),
                                     QMessageBox::Ok);
            seltime = cpaptime;
        }
    } else {
        if (cms50dplus) {
            // Worst case, CMS50D+ and no CPAP data.. the time is basically set to midnight the current day.
            QMessageBox::information(mainwin, STR_MessageBox_Information,
                                     tr("No valid start time was provided for this oximeter session.")+"\n\n"+
                                     tr("You will likely have to adjust your oximeter sessions start time before saving."),
                                     QMessageBox::Ok);
        } else {
            // No point nagging the user at all in this case.. they don't have any CPAP data loaded, so they are just using SleepyHead with the oximeter
        }
    }

    lasttime = seltime.toTime_t();
    session->SetSessionID(lasttime);
    lasttime *= 1000;

    //spo2->setFirst(lasttime);

    EventDataType plmin = 999, plmax = 0;
    EventDataType o2min = 100, o2max = 0;
    int plcnt = 0, o2cnt = 0;
    qint64 lastpltime = 0, lasto2time = 0;
    bool first = true;

    while (i < (size - 3)) {
        a = data.at(i++); // low bits are supposedly the high bits of the heart rate? not here
        pl = ((data.at(i++) & 0x7f) | ((a & 1) << 7)) & 0xff;
        o2 = data.at(i++) & 0x7f;

        // Faulty data..?
        if (o2 < 50) {
            o2 = 0;
        }

        if (pl != 0) {
            if (lastpl != pl) {
                if (lastpl == 0 || !pulse) {
                    if (first) {
                        session->set_first(lasttime);
                        first = false;
                    }

                    if (plcnt == 0) {
                        session->setFirst(OXI_Pulse, lasttime);
                    }

                    if (pulse && pulse->count() == 0)  {

                    } else {
                        pulse = new EventList(EVL_Event);
                        session->eventlist[OXI_Pulse].push_back(pulse);
                    }
                }

                lastpltime = lasttime;
                pulse->AddEvent(lasttime, pl);

                if (pl < plmin) { plmin = pl; }

                if (pl > plmax) { plmax = pl; }

                plcnt++;
            }
        } else {
            if (lastpl != 0) {
                pulse->AddEvent(lasttime, pl);
                lastpltime = lasttime;
                plcnt++;
            }
        }

        if (o2 != 0) {
            if (lasto2 != o2) {
                if (lasto2 == 0  || !spo2) {
                    if (first) {
                        session->set_first(lasttime);
                        first = false;
                    }

                    if (o2cnt == 0) {
                        session->setFirst(OXI_SPO2, lasttime);
                    }

                    if (spo2 && spo2->count() == 0) {
                    } else {
                        spo2 = new EventList(EVL_Event);
                        session->eventlist[OXI_SPO2].push_back(spo2);
                    }
                }

                lasto2time = lasttime;
                spo2->AddEvent(lasttime, o2);

                if (o2 < o2min) { o2min = o2; }

                if (o2 > o2max) { o2max = o2; }

                o2cnt++;
            }
        } else {
            if (lasto2 != 0) {
                spo2->AddEvent(lasttime, o2);
                lasto2time = lasttime;
                o2cnt++;
            }
        }

        lasttime += 1000;
        //emit(updateProgress(float(i)/float(size)));

        lastpl = pl;
        lasto2 = o2;
    }

    /*if (pulse && (lastpltime!=lasttime) && (pl!=0)) {
        // lastpl==pl
        pulse->AddEvent(lasttime,pl);
        lastpltime=lastpltime;
        plcnt++;
    }
    if (spo2 && (lasto2time!=lasttime) && (o2!=0)) {
        spo2->AddEvent(lasttime,o2);
        lasto2time=lasttime;
        o2cnt++;
    }*/
    qint64 rlasttime = qMax(lastpltime, lasto2time);
    session->set_last(rlasttime);
    session->setLast(OXI_Pulse, lastpltime);
    session->setLast(OXI_SPO2, lasto2time);
    session->setMin(OXI_Pulse, plmin);
    session->setMax(OXI_Pulse, plmax);
    session->setMin(OXI_SPO2, o2min);
    session->setMax(OXI_SPO2, o2max);
    session->setCount(OXI_Pulse, plcnt);
    session->setCount(OXI_SPO2, o2cnt);
    session->UpdateSummaries();
    emit(importComplete(session));
    disconnect(this, SIGNAL(importProcess()), this, SLOT(import_process()));
}

void CMS50Serial::ReadyRead()
{
    if (m_mode == SO_OFF) {
        return;
    }

    static int lastbytesize = 0;

    QByteArray bytes;
    int available = m_port->bytesAvailable();
    bytes.resize(available);
    m_port->read(bytes.data(), bytes.size());

    if (m_mode == SO_WAIT) {
        killTimers();
        // Close();
        return;
    }

    m_callbacks++;

    if (!import_mode) {
        if (bytes.size() == 1) { // CMS50D+ transmits a single 0 when switching off from finger out..
            if (lastbytesize != 1) {
                if (timer->isActive()) {
                    timer->stop();
                }

                // Set the Shutdown timer
                timer->setSingleShot(true);
                timer->setInterval(10000);
                timer->start();
            }

            qDebug() << "Oximeter switched off.. wait for timeout?" << hex << bytes.at(0);
            return;
        } else {

            // Cancel any shutdown timer if running
            if (timer->isActive()) {
                timer->stop();
            }
        }
    }

    lastbytesize = available;

    unsigned char c, bc = import_mode ? 0xf0 : 0x80;
    int i = 0;


    while ((i < available) && (((c = (unsigned char)bytes.at(i)) & bc) != bc)) {
        if (buffer.length() > 0) {
            // If buffer is the start of a valid but short frame, add to it..
            buffer.append(c);
        }// otherwise dump these bytes, as they are corrupt.

        ++i;
    }

    // Copy the rest to the buffer.
    for (; i < available; ++i) {
        buffer.append(bytes.at(i));
    }

    unsigned char pulse, spo2, pwave, pbeat;

    available = buffer.length();

    bool pkt_short = false;
    i = 0;
    short hour, minute;
    bool updated = false;

    QString zdata = "";

    int precbytes = received_bytes;

    while (i < available) {
        c = (unsigned char)buffer.at(i);

        if ((c & 0xf0) == 0xf0) { // Record transmit trios all start with 0xf#
            if ((i + 3) >= available) {
                pkt_short = true;
                break;
            }

            if (!import_mode) { // Skip if live mode and the user bumped the upload button by mistake
                i += 3;
                continue;
            }

            imp_callbacks++;

            if (!started_import) {
                for (int j = 0; j < 3; j++) { zdata += QString().sprintf("%02X ", (unsigned char)buffer.at(i + j)); }

                qDebug() << "Recieved Rec Header:" << zdata;
                zdata = "";
            }

            if (c == 0xf2) { // Is this a 3 byte header trio? (there are 3 sets of these at start of record data)
                if (!started_import) {  // Is this a record block header? Only need the first one

                    hour = (unsigned char)buffer.at(i + 1) & 0x7f;
                    minute = (unsigned char)buffer.at(i + 2) & 0x7f;

                    qDebug() << QString("Receiving Oximeter transmission %1:%2").arg(hour).arg(minute);
                    // set importing to true or whatever..

                    finished_import = false;
                    started_import = true;
                    started_reading = false;

                    killTimers();
                    qDebug() << "Getting ready for import";

                    // Hide the connect message box
                    if (mainwin->getOximetry()->connectDeviceMsgBox) {
                        //mainwin->getOximetry()->connectDeviceMsgBox->setText("Transfering Oximetry data from device");
                        mainwin->getOximetry()->disconnect(mainwin->getOximetry()->connectDeviceMsgBox,
                                                           SIGNAL(buttonClicked(QAbstractButton *)), mainwin->getOximetry(), SLOT(cancel_CheckPorts()));
                        mainwin->getOximetry()->close();
                        delete mainwin->getOximetry()->connectDeviceMsgBox;
                        mainwin->getOximetry()->connectDeviceMsgBox = nullptr;
                    }

                    mainwin->getOximetry()->graphView()->setEmptyText(tr("Please Wait, Importing..."));
                    mainwin->getOximetry()->graphView()->timedRedraw(50);

                    QDate oda = QDate::currentDate();
                    QTime oti = QTime(hour,
                                      minute); // Only CMS50E/F's have a realtime clock. CMS50D+ will set this to midnight

                    cms50dplus = (hour == 0)
                                 && (minute == 0); // Either a CMS50D+ or it's really midnight, set a flag anyway for later to help choose the right sync time

                    // If the oximeter record time is more than the current time, then assume it was from the day before
                    // Or should I use split time preference instead??? Foggy Confusements..
                    if (oti > QTime::currentTime()) {
                        oda = oda.addDays(-1);
                    }

                    oxitime = QDateTime(oda, oti);

                    // Convert it to UTC
                    oxitime = oxitime.toTimeSpec(Qt::UTC);

                    qDebug() << "Session start (according to CMS50)" << oxitime << hex << buffer.at(
                                 i + 1) << buffer.at(i + 2) << ":" << dec << hour << minute ;

                    // As an alternative, pick the first session of the last days data..
                    Day *day = PROFILE.GetDay(PROFILE.LastDay(), MT_CPAP);

                    if (day) {
                        int ti = day->first() / 1000L;

                        cpaptime = QDateTime::fromTime_t(ti);

                        qDebug() << "Guessing session starting from CPAP data" << cpaptime;
                    } else { cpaptime = QDateTime(); } // null

                    qDebug() << "Record Import:" << oxitime << cpaptime;

                    cb_reset = 1;

                    // CMS50D+ needs an end timer because it just stops dead after uploading
                    cms50timer2->singleShot(2000, this, SLOT(resetImportTimeout()));
                }

                i += 3;
            } else {
                if (!started_import) {
                    // Crap.. Missed the 0xf2 headers..
                    m_mode = SO_WAIT;
                    killTimers();
                    emit(importAborted());
                    mainwin->getOximetry()->graphView()->setEmptyText(
                        tr("Import Failed. Wait for oximeter and try again."));
                    mainwin->Notify(tr("Something went wrong with reading from the Oximeter.")+"\n"+tr("Please wait for oximeter to finish tranmitting than try restarting import again."),
                                    tr("Import Failed"));
                    mainwin->getOximetry()->graphView()->timedRedraw(50);
                    break;
                }

                started_reading = true; // Sometimes errornous crap is sent after data rec header

                // Recording import
                if ((i + 2) >= available) {
                    pkt_short = true;
                    break;
                }

                pulse = (unsigned char)buffer.at(i + 1) & 0x7f;
                spo2 = (unsigned char)buffer.at(i + 2) & 0x7f;
                data.push_back(buffer.at(i));
                data.push_back(buffer.at(i + 1));
                data.push_back(buffer.at(i + 2));
                received_bytes += 3;

                i += 3;
            }

        } else if ((c & 0x80) == 0x80) {
            if (import_mode && started_reading) { // (Sometimes errornous bytes get transfered after header)
                qDebug() << "Stopped importing due to live data";
                // We were importing, but now are done

                killTimers();

                started_import = false;
                started_reading = false;
                finished_import = true;
                m_mode = SO_WAIT; // Temporarily pause until complete shutdown.

                emit(importProcess());
                break;
            }

            // Standard frame.. make sure theres the full 5 byte sequence
            if ((i + 4) > available) {
                pkt_short = true;
                break;
            }

            if (!import_mode) {
                pwave = (unsigned char)buffer.at(i + 1);
                pbeat = (unsigned char)buffer.at(i + 2);
                pulse = ((unsigned char)buffer.at(i + 3) & 0x7f) | ((pbeat & 0x40) << 1);
                spo2 = (unsigned char)buffer.at(i + 4) & 0x7f;

                addPlethy(lasttime, pwave);
                addPulse(lasttime, pulse);
                addSpO2(lasttime, spo2);
                lasttime += 20;
                updated = true;
            }

#if SERIAL_DEBUG
            //qDebug() << "Live: " << pulse << spo2 << pwave << pbeat;
#endif
            // whatever depending on mode..
            i += 5;
        } else { break; }
    }


#if SERIAL_DEBUG

    if ((import_mode) && (received_bytes > precbytes)) {
        qDebug() << "Received Bytes" << received_bytes - precbytes;    // << ":" << zdata;
    }

#endif

    if (i > 0) {
        // Trim any processed bytes from the buffer.
        buffer = buffer.mid(i);
        i = 0;
        // available should be < 5 or 3 here..
    }

    available = buffer.length();

    if (available > 0) {
        if ((buffer.at(0) & 0x80) != 0x80) {
            buffer.clear();
        }
    }

    if (updated) {
        emit(dataChanged());
    }
}
void CMS50Serial::resetDevice()
{
    qDebug() << "Sending reset code to CMS50 device";
    //m_port->flush();
    static unsigned char b1[3] = {0xf6, 0xf6, 0xf6};

    if (m_port->write((char *)b1, 3) == -1) {
        qDebug() << "Couldn't write data reset bytes to CMS50";
    }
}

void CMS50Serial::requestData()
{
    static unsigned char b1[2] = {0xf5, 0xf5};

    qDebug() << "Sending request code to CMS50 device";

    if (m_port->write((char *)b1, 2) == -1) {
        qDebug() << "Couldn't write data request bytes to CMS50";
    }
}

bool CMS50Serial::startImport()
{
    buffer.clear();
    data.clear();

    killTimers();

    m_mode = SO_IMPORT;
    import_mode = true;
    started_import = false;
    started_reading = false;
    finished_import = false;

    imptime.start();

    imp_callbacks = 0;
    m_callbacks = 0;

    cb_reset = 0;
    import_fails = 0;
    failcnt = 0;

    connect(this, SIGNAL(importProcess()), this, SLOT(import_process()));

    if (!m_opened && !Open(QextSerialPort::EventDriven)) {
        return false;
    }

    // doesn't need to happen until process..
    createSession();

#ifdef SERIAL_DEBUG
    qDebug() << "Starting startImportTimer";
#endif
    startImportTimeout();

    return true;
}

void CMS50Serial::stopImport()  // Silently stops import dead
{
    disconnect(this, SIGNAL(importProcess()), this, SLOT(import_process()));

    m_mode = SO_OFF;
    //    killTimers();
    started_import = false;
    import_mode = false;
    finished_import = false;
}

void CMS50Serial::startImportTimeout()
{
    if ((m_mode == SO_WAIT) || (m_mode == SO_OFF)
            || finished_import
            || started_import) {

        return;
    }

    // Wait until events really are jammed on the CMS50D+ before re-requesting data.
    if (imp_callbacks == 0) { // Frozen, but still hasn't started?
        int elapsed = imptime.elapsed() / 1000;

        if (elapsed > 30) { // Give up after ~20 seconds
            m_mode = SO_WAIT;
            killTimers();
            emit(importAborted());
            mainwin->getOximetry()->graphView()->setEmptyText(tr("Import Failed"));
            mainwin->getOximetry()->graphView()->timedRedraw(50);
            return;
        } else {
            QString a = tr("Set Oximeter to Upload");

            for (int j = 0; j < elapsed; j++) { a += "."; }

            mainwin->getOximetry()->graphView()->setEmptyText(a);
            mainwin->getOximetry()->graphView()->timedRedraw(50);
            // Note: Newer CMS50 devices transmit from user input
            requestData();
        }

        // Schedule another callback to make sure it's started
        cms50timer->singleShot(1000, this, SLOT(startImportTimeout()));
    }
}
void CMS50Serial::resetImportTimeout()
{
    if ((m_mode == SO_WAIT) || (finished_import)) {
        return;
    }

    if (imp_callbacks != cb_reset) {
        // Still receiving data.. reset timer
        qDebug() << "Still receiving data in resetImportTimeout()";

        if (cms50timer2->isActive()) {
            cms50timer2->stop();
        }

        cms50timer2->singleShot(2000, this, SLOT(resetImportTimeout()));
    } else {
        qDebug() << "Oximeter device stopped transmitting.. Transfer complete";

        // We were importing, but now are done
        if (!finished_import && (started_import && started_reading)) {
            qDebug() << "Switching CMS50 back to live mode and finalizing import";
            // Turn back on live streaming so the end of capture can be dealt with
            cms50timer2->stop();

            m_port->flush();
            resetDevice(); // Send Reset to CMS50D+
            //started_import=false;
            finished_import = true;
            m_mode = SO_WAIT; // Temporarily pause until complete shutdown.

            emit(importProcess());
            return;
        }

        qDebug() << "Should CMS50 resetImportTimeout reach here?";
        // else what???
    }

    cb_reset = imp_callbacks;
}


Oximetry::Oximetry(QWidget *parent, gGraphView *shared) :
    QWidget(parent),
    ui(new Ui::Oximetry)
{
    m_shared = shared;
    ui->setupUi(this);

    port = nullptr;
    portname = "";

    oximeter = new CMS50Serial(this);

    day = new Day(oximeter->getMachine());

    QVBoxLayout *framelayout = new QVBoxLayout(ui->graphArea);
    ui->graphArea->setLayout(framelayout);

    QFrame *border = new QFrame(ui->graphArea);

    framelayout->setMargin(1);
    border->setFrameShape(QFrame::StyledPanel);
    framelayout->addWidget(border,1);


    layout = new QHBoxLayout(ui->graphArea);
    layout->setSpacing(0);
    layout->setMargin(0);
    layout->setContentsMargins(0, 0, 0, 0);
    border->setLayout(layout);
    border->setAutoFillBackground(false);

    GraphView = new gGraphView(ui->graphArea, m_shared);
    GraphView->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);

    scrollbar = new MyScrollBar(ui->graphArea);
    scrollbar->setOrientation(Qt::Vertical);
    scrollbar->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Expanding);
    scrollbar->setMaximumWidth(20);

    GraphView->setScrollBar(scrollbar);
    layout->addWidget(GraphView, 1);
    layout->addWidget(scrollbar, 0);

    layout->layout();

    PLETHY = new gGraph(GraphView, schema::channel[OXI_Plethy].label(),
                        schema::channel[OXI_Plethy].units(), 120);
    CONTROL = new gGraph(GraphView, tr("Control"), "", 75);
    PULSE = new gGraph(GraphView, schema::channel[OXI_Pulse].label(),
                       schema::channel[OXI_Pulse].units(), 120);
    SPO2 = new gGraph(GraphView, schema::channel[OXI_SPO2].label(), schema::channel[OXI_SPO2].units(),
                      120);
    foobar = new gShadowArea();
    CONTROL->AddLayer(foobar);
    Layer *cl = new gLineChart(OXI_Plethy);
    CONTROL->AddLayer(cl);
    cl->SetDay(day);
    CONTROL->setBlockZoom(true);

    for (int i = 0; i < GraphView->size(); i++) {
        gGraph *g = (*GraphView)[i];
        g->AddLayer(new gXAxis(), LayerBottom, 0, gXAxis::Margin);
        g->AddLayer(new gYAxis(), LayerLeft, gYAxis::Margin);
        g->AddLayer(new gXGrid());
    }

    plethy = new gLineChart(OXI_Plethy, COLOR_Plethy, false, true);
    plethy->SetDay(day);

    CONTROL->AddLayer(plethy); //new gLineChart(OXI_Plethysomogram));


    pulse = new gLineChart(OXI_Pulse, COLOR_Pulse, true);
    //pulse->SetDay(day);

    spo2 = new gLineChart(OXI_SPO2, COLOR_SPO2, true);
    //spo2->SetDay(day);

    PLETHY->AddLayer(plethy);

    PULSE->AddLayer(lo1 = new gLineOverlayBar(OXI_PulseChange, COLOR_PulseChange, STR_TR_PC, FT_Span));
    SPO2->AddLayer(lo2 = new gLineOverlayBar(OXI_SPO2Drop, COLOR_SPO2Drop, STR_TR_O2, FT_Span));
    PULSE->AddLayer(pulse);
    SPO2->AddLayer(spo2);
    PULSE->setDay(day);
    SPO2->setDay(day);

    lo1->SetDay(day);
    lo2->SetDay(day);
    //go->SetDay(day);

    GraphView->setEmptyText(tr("No Oximetry Data"));
    GraphView->redraw();

    on_RefreshPortsButton_clicked();
    ui->RunButton->setChecked(false);

    ui->saveButton->setEnabled(false);
    GraphView->LoadSettings("Oximetry");

    QLocale locale = QLocale::system();
    QString shortformat = locale.dateFormat(QLocale::ShortFormat);

    if (!shortformat.toLower().contains("yyyy")) {
        shortformat.replace("yy", "yyyy");
    }

    ui->dateEdit->setDisplayFormat(shortformat + " HH:mm:ss");
    //Qt::DayOfWeek dow=firstDayOfWeekFromLocale();

    //ui->dateEdit->calendarWidget()->setFirstDayOfWeek(dow);


    // Stop both calendar drop downs highlighting weekends in red
    //QTextCharFormat format = ui->dateEdit->calendarWidget()->weekdayTextFormat(Qt::Saturday);
    //format.setForeground(QBrush(COLOR_Text, Qt::SolidPattern));
    //ui->dateEdit->calendarWidget()->setWeekdayTextFormat(Qt::Saturday, format);
    //ui->dateEdit->calendarWidget()->setWeekdayTextFormat(Qt::Sunday, format);
    dont_update_date = false;
}

Oximetry::~Oximetry()
{
    delete ui;
}

void Oximetry::closeEvent(QCloseEvent *event)
{
    delete oximeter;
    GraphView->SaveSettings("Oximetry");

    QWidget::closeEvent(event);
}

void Oximetry::on_RefreshPortsButton_clicked()
{
    QList<QextPortInfo> ports = QextSerialEnumerator::getPorts();

    ui->SerialPortsCombo->clear();
    int z = 0;
    QString firstport;
    bool current_found = false;
    const QString STR_USB = "USB";

    // Windows build mixes these up
#if defined(Q_OS_WIN32) || defined(Q_OS_MAC)
#define qesPORTNAME portName
#else
#define qesPORTNAME physName
#endif

    for (int i = 0; i < ports.size(); i++) {
        if (!ports.at(i).friendName.isEmpty()) {
            if (ports.at(i).friendName.toUpper().contains(STR_USB)) {
                if (firstport.isEmpty()) { firstport = ports.at(i). qesPORTNAME; }

                if (!portname.isEmpty() && ports.at(i).qesPORTNAME == portname) { current_found = true; }

                ui->SerialPortsCombo->addItem(ports.at(i).qesPORTNAME);
                z++;
            }
        } else { // Mac stuff.
            if (ports.at(i).portName.toUpper().contains(STR_USB)
                    || ports.at(i).portName.toUpper().contains("SPO2")) {
                if (firstport.isEmpty()) { firstport = ports.at(i).portName; }

                if (!portname.isEmpty() && ports.at(i).portName == portname) { current_found = true; }

                ui->SerialPortsCombo->addItem(ports.at(i).portName);
                z++;
            }
        }

        qDebug() << "Serial Port:" << ports.at(i).qesPORTNAME << ports.at(i).friendName;
        qDebug() << "port name:" << ports.at(i).portName;
        qDebug() << "phys name:" << ports.at(i).physName;
        qDebug() << "friendly name:" << ports.at(i).friendName;
        qDebug() << "enumerator name:" << ports.at(i).enumName;
    }

    if (z > 0) {
        ui->RunButton->setEnabled(true);
        ui->ImportButton->setEnabled(true);

        if (!current_found) { portname = firstport; }
    } else {
        ui->RunButton->setEnabled(false);
        ui->ImportButton->setEnabled(false);
        portname = "";
    }

    oximeter->setPortName(portname);
}
void Oximetry::serialImport()
{
    connect(oximeter, SIGNAL(importComplete(Session *)), this, SLOT(import_complete(Session *)));
    connect(oximeter, SIGNAL(importAborted()), this, SLOT(import_aborted()));
    connect(oximeter, SIGNAL(updateProgress(float)), this, SLOT(update_progress(float)));
    PLETHY->setVisible(false);
    day->getSessions().clear();
    GraphView->setDay(day);
    //GraphView->setEmptyText(tr("Make Sure Oximeter is Ready"));
    //GraphView->redraw();

    cancel_Import = false;
    QTimer::singleShot(100, this, SLOT(timeout_CheckPorts()));
    connectDeviceMsgBox = new QMessageBox(QMessageBox::Information, tr("Connect Oximeter"),
                                          tr("Please connect oximeter device"),
                                          QMessageBox::Cancel);
    connect(connectDeviceMsgBox, SIGNAL(buttonClicked(QAbstractButton *)), this,
            SLOT(cancel_CheckPorts(QAbstractButton *)));
    connectDeviceMsgBox->exec();
    //    QApplication::processEvents();
}

void Oximetry::cancel_CheckPorts(QAbstractButton *)
{
    qDebug() << "cancel_CheckPorts()";
    cancel_Import = true;

    disconnect(connectDeviceMsgBox, 0, 0,
               0); //SIGNAL(buttonClicked(QAbstractButton*)),this,SLOT(cancel_CheckPorts()));
    disconnect(oximeter, SIGNAL(importComplete(Session *)), this, SLOT(import_complete(Session *)));
    disconnect(oximeter, SIGNAL(importAborted()), this, SLOT(import_aborted()));
    disconnect(oximeter, SIGNAL(updateProgress(float)), this, SLOT(update_progress(float)));

    connectDeviceMsgBox->close();
    delete connectDeviceMsgBox;
    connectDeviceMsgBox = nullptr;


    if (oximeter->isImporting()) {
        oximeter->stopImport();
    }
}

void Oximetry::timeout_CheckPorts()
{
    if (cancel_Import) {
        return;
    }

    if (portname == "") {
        qDebug() << "restarting timeout_CheckPorts()";
        on_RefreshPortsButton_clicked();

        if (portname == "") {
            QTimer::singleShot(1000, this, SLOT(timeout_CheckPorts()));
            return;
        }
    }

    qDebug() << "Calling oximeter->startImport()";

    if (!oximeter->startImport()) {
        QTimer::singleShot(1000, this, SLOT(timeout_CheckPorts()));
        return;
    }

    qDebug() << "Success at oximeter->startImport()";

    disconnect(connectDeviceMsgBox, SIGNAL(buttonClicked(QAbstractButton *)), this,
               SLOT(cancel_CheckPorts(QAbstractButton *)));
    connectDeviceMsgBox->close();
    delete connectDeviceMsgBox;

    //connectDeviceMsgBox=nullptr;
    connectDeviceMsgBox = new QMessageBox(QMessageBox::Information, tr("Device Connected"),
                                          tr("Please make sure Oximeter device is in upload mode."),
                                          QMessageBox::Cancel);
    connect(connectDeviceMsgBox, SIGNAL(buttonClicked(QAbstractButton *)), this,
            SLOT(cancel_CheckPorts(QAbstractButton *)));
    connectDeviceMsgBox->exec();
    //mainwin->Notify(tr("Please make sure Oximeter device is in upload mode."),tr("Device Connected"));
}

void Oximetry::RedrawGraphs()
{
    GraphView->redraw();
}
void Oximetry::on_SerialPortsCombo_activated(const QString &arg1)
{
    portname = arg1;
    oximeter->setPortName(arg1);
}

void Oximetry::live_stopped(Session *session)
{
    Q_UNUSED(session);
    mainwin->Notify(tr("Oximetry live recording has been terminated due to timeout."));
    //qDebug () << "Live Stopped";
    on_RunButton_toggled(false);
}

void Oximetry::on_RunButton_toggled(bool checked)
{
    if (!checked) {
        oximeter->stopLive();
        ui->RunButton->setText(tr("&Start"));
        ui->SerialPortsCombo->setEnabled(true);
        disconnect(oximeter, SIGNAL(dataChanged()), this, SLOT(data_changed()));
        disconnect(oximeter, SIGNAL(updatePulse(float)), this, SLOT(pulse_changed(float)));
        disconnect(oximeter, SIGNAL(updateSpO2(float)), this, SLOT(spo2_changed(float)));
        disconnect(oximeter, SIGNAL(liveStopped(Session *)), this, SLOT(live_stopped(Session *)));
        ui->saveButton->setEnabled(true);
        ui->ImportButton->setEnabled(true);
        lo2->SetDay(day);
        lo1->SetDay(day);

        if (oximeter->getSession()) {
            saved_starttime = oximeter->getSession()->first();
        }



        //CONTROL->setVisible(true);
    } else {
        if (oximeter->getSession() && oximeter->getSession()->IsChanged()) {
            int res=askSaveSession();
            if (res == 0) {
                on_saveButton_clicked();
                return;
            } else if (res == 2) {
                return;
            }
        } // else it's already saved.

        GraphView->setEmptyText(tr("Please Wait"));
        GraphView->redraw();

        PLETHY->setVisible(true);
        SPO2->setVisible(true);
        PULSE->setVisible(true);

        PLETHY->setRecMinY(0);
        PLETHY->setRecMaxY(128);
        PULSE->setRecMinY(60);
        PULSE->setRecMaxY(100);
        SPO2->setRecMinY(90);
        SPO2->setRecMaxY(100);

        day->getSessions().clear();

        //QTimer::singleShot(10000,this,SLOT(oximeter_running_check()));
        if (!oximeter->startLive()) {
            mainwin->Notify(tr("Oximetry Error!\n\nSomething is wrong with the device connection."));
            return;
        }

        ui->saveButton->setEnabled(false);
        day->AddSession(oximeter->getSession());

        firstPulseUpdate = true;
        firstSPO2Update = true;
        secondPulseUpdate = true;
        secondSPO2Update = true;

        qint64 f = oximeter->getSession()->first();
        //day->setFirst(f);
        plethy->setMinX(f);
        pulse->setMinX(f);
        spo2->setMinX(f);
        PLETHY->SetMinX(f);
        CONTROL->SetMinX(f);
        PULSE->SetMinX(f);
        SPO2->SetMinX(f);

        //graphView()->updateScale();
        /*PLETHY->setForceMinY(0);
        PLETHY->setForceMaxY(128);
        PULSE->setForceMinY(30);
        PULSE->setForceMaxY(180);
        SPO2->setForceMinY(50);
        SPO2->setForceMaxY(100); */

        connect(oximeter, SIGNAL(dataChanged()), this, SLOT(data_changed()));
        connect(oximeter, SIGNAL(updatePulse(float)), this, SLOT(pulse_changed(float)));
        connect(oximeter, SIGNAL(updateSpO2(float)), this, SLOT(spo2_changed(float)));
        connect(oximeter, SIGNAL(liveStopped(Session *)), this, SLOT(live_stopped(Session *)));

        CONTROL->setVisible(false);
        // connect.
        ui->RunButton->setText(tr("&Stop"));
        ui->SerialPortsCombo->setEnabled(false);
        ui->ImportButton->setEnabled(false);
    }

}
void Oximetry::data_changed()
{

    qint64 last = oximeter->lastTime();
    qint64 first = last - 30000L;
    //day->setLast(last);

    plethy->setMinX(first);
    plethy->setMaxX(last);
    pulse->setMinX(first);
    pulse->setMaxX(last);
    spo2->setMinX(first);
    spo2->setMaxX(last);

    plethy->setMinY((oximeter->Plethy())->Min());
    plethy->setMaxY((oximeter->Plethy())->Max());
    pulse->setMinY((oximeter->Pulse())->Min());
    pulse->setMaxY((oximeter->Pulse())->Max());
    spo2->setMinY((oximeter->Spo2())->Min());
    spo2->setMaxY((oximeter->Spo2())->Max());

    PLETHY->SetMinY((oximeter->Plethy())->Min());
    PLETHY->SetMaxY((oximeter->Plethy())->Max());
    PULSE->SetMinY((oximeter->Pulse())->Min());
    PULSE->SetMaxY((oximeter->Pulse())->Max());
    SPO2->SetMinY((oximeter->Spo2())->Min());
    SPO2->SetMaxY((oximeter->Spo2())->Max());

    /*PLETHY->MinY();
    PLETHY->MaxY();
    PULSE->MinY();
    PULSE->MaxY();
    SPO2->MinY();
    SPO2->MaxY(); */

    PLETHY->SetMaxX(last);
    PULSE->SetMaxX(last);
    CONTROL->SetMaxX(last);
    SPO2->SetMaxX(last);

    for (int i = 0; i < GraphView->size(); i++) {
        (*GraphView)[i]->SetXBounds(first, last);
    }

    {
        int len = (last - first) / 1000L;
        int h = len / 3600;
        int m = (len / 60) % 60;
        int s = (len % 60);

        if (qstatus2) { qstatus2->setText(QString().sprintf("Rec %02i:%02i:%02i", h, m, s)); } // translation fix?
    }

    GraphView->updateScale();
    GraphView->timedRedraw(25);
}


extern QProgressBar *qprogress;
extern QLabel *qstatus;


void DumpBytes(int blocks, unsigned char *b, int len)
{
    QString a = QString::number(blocks, 16) + ": Bytes " + QString::number(len, 16) + ": ";

    for (int i = 0; i < len; i++) {
        a.append(QString::number(b[i], 16) + " ");
    }

    qDebug() << a;
}
void Oximetry::oximeter_running_check()
{
    if (!oximeter->isOpen()) {
        if (oximeter->callbacks() == 0) {
            qDebug() << "Not sure how oximeter_running_check gets called with a closed oximeter.. Restarting import process";
            //mainwin->Notify(tr("Oximeter Error\n\nThe device has not responded.. Make sure it's switched on2"));
            on_ImportButton_clicked();
            return;
        }
    }

    if (oximeter->callbacks() == 0) {
        mainwin->Notify(tr("Oximeter Error\n\nThe device has not responded.. Make sure it's switched on."));

        if (oximeter->mode() == SO_IMPORT) { oximeter->stopImport(); }

        if (oximeter->mode() == SO_LIVE) { oximeter->stopLive(); }

        oximeter->destroySession();
        day->getSessions().clear();
        ui->SerialPortsCombo->setEnabled(true);
        qstatus->setText(STR_TR_Ready);
        ui->ImportButton->setEnabled(true);
        ui->RunButton->setChecked(false);
        ui->saveButton->setEnabled(false);
        GraphView->setEmptyText(tr("Check Oximeter is Ready"));
        GraphView->redraw();

    }
}

// Move this code to CMS50 Importer??
void Oximetry::on_ImportButton_clicked()
{
    connect(oximeter, SIGNAL(importComplete(Session *)), this, SLOT(import_complete(Session *)));
    connect(oximeter, SIGNAL(importAborted()), this, SLOT(import_aborted()));
    connect(oximeter, SIGNAL(updateProgress(float)), this, SLOT(update_progress(float)));

    PLETHY->setVisible(false);
    day->getSessions().clear();
    GraphView->setDay(day);
    //GraphView->setEmptyText(tr("Make Sure Oximeter is Ready"));
    //GraphView->redraw();

    if (!oximeter->startImport()) {
        mainwin->Notify(tr("Oximeter Error\n\nThe device did not respond.. Make sure it's switched on."));
        import_finished();
        //        disconnect(oximeter,SIGNAL(importComplete(Session*)),this,SLOT(import_complete(Session*)));
        //        disconnect(oximeter,SIGNAL(importAborted()),this,SLOT(import_aborted()));
        //        disconnect(oximeter,SIGNAL(updateProgress(float)),this,SLOT(update_progress(float)));
        //qDebug() << "Error starting oximetry serial import process";
        return;
    }

    //QTimer::singleShot(1000,this,SLOT(oximeter_running_check()));

    if (qprogress) {
        qprogress->setValue(0);
        qprogress->setMaximum(100);
        qprogress->show();
    }

    ui->ImportButton->setDisabled(true);
    ui->SerialPortsCombo->setEnabled(false);
    ui->RunButton->setText(tr("&Start"));
    ui->RunButton->setChecked(false);
}

void Oximetry::import_finished()
{
    if (connectDeviceMsgBox) {
        connectDeviceMsgBox->close();
        disconnect(connectDeviceMsgBox, SIGNAL(buttonClicked(QAbstractButton *)), this,
                   SLOT(cancel_CheckPorts()));
        delete connectDeviceMsgBox;
        connectDeviceMsgBox = nullptr;
    }

    disconnect(oximeter, SIGNAL(importComplete(Session *)), this, SLOT(import_complete(Session *)));
    disconnect(oximeter, SIGNAL(importAborted()), this, SLOT(import_aborted()));
    disconnect(oximeter, SIGNAL(updateProgress(float)), this, SLOT(update_progress(float)));
    oximeter->disconnect(oximeter, SIGNAL(importProcess()), 0, 0);

    //    oximeter->Close();
    // Hanging here.. :(

    ui->SerialPortsCombo->setEnabled(true);
    qstatus->setText(STR_TR_Ready);
    ui->ImportButton->setDisabled(false);
    ui->saveButton->setEnabled(true);

    if (qprogress) {
        qprogress->setValue(100);
        qprogress->hide();
    }
}

void Oximetry::import_aborted()
{
    day->getSessions().clear();
    //QMessageBox::warning(mainwin,tr("Oximeter Error"),tr("Please make sure your oximeter is switched on, and able to transmit data.\n(You may need to enter the oximeters Settings screen for it to be able to transmit.)"),QMessageBox::Ok);
    mainwin->Notify(
        tr("Please make sure your oximeter is switched on, and in the right mode to transmit data."),
        tr("Oximeter Error!"), 5000);
    //qDebug() << "Oximetry import failed";

    import_finished();
}
void Oximetry::import_complete(Session *session)
{
    qDebug() << "Oximetry import complete";
    import_finished();
    day->AddSession(oximeter->getSession());

    if (!session) {
        qDebug() << "Shouldn't happen";
        return;
    }

    //calcSPO2Drop(session);
    //calcPulseChange(session);
    //PLETHY->setVisible(false);

    CONTROL->setVisible(false);

    saved_starttime = session->first();
    dont_update_date = true;
    ui->dateEdit->setDateTime(QDateTime::fromTime_t(saved_starttime / 1000L));
    dont_update_date = false;


    updateGraphs();
}

void Oximetry::pulse_changed(float p)
{
    ui->pulseLCD->display(p);
    return;

    if (firstPulseUpdate) {
        if (secondPulseUpdate) {
            secondPulseUpdate = false;
        } else {
            firstPulseUpdate = false;
            GraphView->updateScale();
        }
    }
}

// Only really need to do this once..
void Oximetry::spo2_changed(float o2)
{
    ui->spo2LCD->display(o2);
    return;

    if (firstSPO2Update) {
        if (secondSPO2Update) {
            secondSPO2Update = false;
        } else {
            firstSPO2Update = false;
            GraphView->updateScale();
        }
    }
}

void Oximetry::on_saveButton_clicked()
{
    if (QMessageBox::question(this, tr("Keep This Recording?"),
                              tr("Would you like to save this oximetery session?"),
                              QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes) {
        Session *session = oximeter->getSession();

        // Process???
        //session->UpdateSummaries();
        PROFILE.RemoveSession(session);
        Machine *m = oximeter->getMachine();

        if (m->SessionExists(session->session())) {
            m->sessionlist.erase(m->sessionlist.find(session->session()));
        }

        QString path = PROFILE.Get(m->properties[STR_PROP_Path]) + QString().sprintf("%08lx",
                       session->session());
        QString f1 = path + ".000";
        QString f2 = path + ".001";
        QFile::remove(f1);
        QFile::remove(f2);
        // Forgetting to reset the session ID sucks, as it will delete sessions you don't want to delete..
        session->SetSessionID(qint64(session->first()) / 1000L);

        m->AddSession(session, p_profile);

        oximeter->getMachine()->Save();
        day->getSessions().clear();

        mainwin->getDaily()->LoadDate(mainwin->getDaily()->getDate());
        mainwin->getOverview()->ReloadGraphs();
        GraphView->setEmptyText(tr("No Oximetry Data"));
        GraphView->redraw();
    }
}
void Oximetry::update_progress(float f)
{
    if (qprogress) {
        qprogress->setValue(f * 100.0);
        QApplication::processEvents();
    }
}

bool Oximetry::openSPOFile(QString filename)
{
    QFile f(filename);

    if (!f.open(QFile::ReadOnly)) { return false; }

    QByteArray data;

    data = f.readAll();
    long size = data.size();

    int pos = ((unsigned char)data.at(1) << 8) | (unsigned char)data.at(0);
    char dchr[20];
    int j = 0;

    for (int i = 0; i < 18 * 2; i += 2) {
        dchr[j++] = data.at(8 + i);
    }

    dchr[j] = 0;
    QString dstr(dchr);
    QDateTime date = QDateTime::fromString(dstr, "MM/dd/yy HH:mm:ss");

    if (date.date().year() < 2000) { date = date.addYears(100); }

    //ui->dateEdit->setDateTime(date);

    day->getSessions().clear();
    oximeter->createSession(date);
    Session *session = oximeter->getSession();
    day->AddSession(session);
    session->set_first(0);

    firstPulseUpdate = true;
    firstSPO2Update = true;
    secondPulseUpdate = true;
    secondSPO2Update = true;

    unsigned char o2, pr;
    //quint16 pl;
    qint64 tt = qint64(date.toTime_t()) * 1000L;

    for (int i = pos; i < size - 5;) {
        o2 = (unsigned char)(data.at(i + 4));
        pr = (unsigned char)(data.at(i + 3));
        //oximeter->setLastTime(tt);
        oximeter->addPulse(tt, pr);
        oximeter->addSpO2(tt, o2);
        //pl=(unsigned char)(data.at(i+1));


        //oximeter->addPlethy(tt,pl);
        //pl=(unsigned char)(data.at(i+1));
        //oximeter->addPlethy(tt,pl);
        //pl=(unsigned char)(data.at(i+2));
        //oximeter->addPlethy(tt,pl);
        i += 5;
        //data_changed();
        tt += 1000;
    }

    qint64 t1 = session->first(OXI_Pulse);
    qint64 t2 = session->first(OXI_SPO2);
    qint64 t3 = qMin(t1, t2);
    session->set_first(t3);
    //day->setFirst(t3);
    int zi = t3 / 1000L;
    session->SetSessionID(zi);
    date.fromTime_t(zi);
    dont_update_date = true;
    ui->dateEdit->setDateTime(date);
    dont_update_date = false;

    t1 = session->last(OXI_Pulse);
    t2 = session->last(OXI_SPO2);
    t3 = qMax(t1, t2);
    session->set_last(t3);
    //day->setLast(t3);
    CONTROL->setVisible(false);

    updateGraphs();

    f.close();
    ui->saveButton->setEnabled(true);
    return true;
}

bool Oximetry::openSPORFile(QString filename)
{
    //GraphView->setEmptyText(tr("Please Wait"));
    //GraphView->redraw();
    QFile f(filename);

    if (!f.open(QFile::ReadOnly)) { return false; }

    QByteArray data;

    data = f.readAll();
    long size = data.size();

    int pos = ((unsigned char)data.at(1) << 8) | (unsigned char)data.at(0);
    char dchr[20];
    int j = 0;

    for (int i = 0; i < 18 * 2; i += 2) {
        dchr[j++] = data.at(8 + i);
    }

    dchr[j] = 0;
    QString dstr(dchr);
    QDateTime date = QDateTime::fromString(dstr, "MM/dd/yy HH:mm:ss");

    if (date.date().year() < 2000) { date = date.addYears(100); }

    day->getSessions().clear();
    oximeter->createSession(date);
    Session *session = oximeter->getSession();
    day->AddSession(session);
    session->set_first(0);

    firstPulseUpdate = true;
    firstSPO2Update = true;
    secondPulseUpdate = true;
    secondSPO2Update = true;

    unsigned char o2, pr;
    //quint16 pl;
    qint64 tt = qint64(date.toTime_t()) * 1000L;

    for (int i = pos; i < size - 2;) {
        o2 = (unsigned char)(data.at(i + 1));
        pr = (unsigned char)(data.at(i + 0));
        oximeter->addPulse(tt, pr);
        oximeter->addSpO2(tt, o2);
        //pl=(unsigned char)(data.at(i+1));
        i += 2;
        tt += 1000;
    }

    qint64 t1 = session->first(OXI_Pulse);
    qint64 t2 = session->first(OXI_SPO2);
    qint64 t3 = qMin(t1, t2);
    session->set_first(t3);
    //day->setFirst(t3);
    int zi = t3 / 1000L;
    session->SetSessionID(zi);
    date.fromTime_t(zi);
    dont_update_date = true;
    ui->dateEdit->setDateTime(date);
    dont_update_date = false;


    t1 = session->last(OXI_Pulse);
    t2 = session->last(OXI_SPO2);
    t3 = qMax(t1, t2);
    session->set_last(t3);
    //day->setLast(t3);


    //PLETHY->setVisible(false);
    CONTROL->setVisible(false);

    updateGraphs();
    f.close();
    ui->saveButton->setEnabled(true);
    return true;
}

void Oximetry::on_openButton_clicked()
{
    if (oximeter->getSession() && oximeter->getSession()->IsChanged()) {
        int res=askSaveSession();
        if (res == 0) {
            on_saveButton_clicked();
            return;
        } else if (res == 2) {
            return;
        }
    } // else it's already saved.

    QString dir = "";
    QFileDialog fd(this, tr("Select an oximetry file"), dir, tr("Oximetry Files (*.spo *.spoR)"));
    fd.setAcceptMode(QFileDialog::AcceptOpen);
    fd.setFileMode(QFileDialog::ExistingFile);

    if (fd.exec() != QFileDialog::Accepted) { return; }

    QStringList filenames = fd.selectedFiles();

    if (filenames.size() > 1) {
        qDebug() << "Can only open one oximetry file at a time";
    }

    QString filename = filenames[0];
    bool r = false;

    if (filename.toLower().endsWith(".spo")) { r = openSPOFile(filename); }
    else if (filename.toLower().endsWith(".spor")) { r = openSPORFile(filename); }

    if (!r) {
        mainwin->Notify(tr("Couldn't open oximetry file \"") + filename + "\".");
    }

    qDebug() << "opening" << filename;
}

void Oximetry::on_dateEdit_dateTimeChanged(const QDateTime &date)
{
    Session *session = oximeter->getSession();

    if (!session) {
        return;
    }

    if (dont_update_date) {
        return;
    }

    qint64 first = session->first();
    //qint64 last=session->last();
    qint64 tt = qint64(date.toTime_t()) * 1000L;
    qint64 offset = tt - first;

    if (offset != 0) {
        session->SetChanged(true);
        ui->saveButton->setEnabled(true);
    }

    session->offsetSession(offset);

    updateGraphs();
}

int Oximetry::askSaveSession()
{
    return QMessageBox::question(this, STR_MessageBox_Question,
        tr("Current oximetry session still has unsaved data in it.")+"\n\n"+
        tr("Would you like to save it first?"),
        STR_MessageBox_Save, STR_MessageBox_Destroy, STR_MessageBox_Cancel, 0, 2);

}

void Oximetry::openSession(Session *session)
{
    if (oximeter->getSession() && oximeter->getSession()->IsChanged()) {
        int res=askSaveSession();
        if (res == 0) {
            on_saveButton_clicked();
            return;
        } else if (res == 2) {
            return;
        }
    } // else it's already saved.

    day->getSessions().clear();
    day->AddSession(session);

    oximeter->setSession(session);

    saved_starttime = session->first();
    oximeter->compactAll();

    QDateTime date = QDateTime::fromTime_t(saved_starttime / 1000L);
    dont_update_date = true;
    ui->dateEdit->setDateTime(date);
    dont_update_date = false;
    updateGraphs();

}
void Oximetry::updateGraphs()
{
    Session *session = oximeter->getSession();

    if (!session) { return; }

    qint64 first = session->first();
    qint64 last = session->last();

    ui->pulseLCD->display(session->Min(OXI_Pulse));
    ui->spo2LCD->display(session->Min(OXI_SPO2));

    pulse->setMinY(session->Min(OXI_Pulse));
    pulse->setMaxY(session->Max(OXI_Pulse));
    spo2->setMinY(session->Min(OXI_SPO2));
    spo2->setMaxY(session->Max(OXI_SPO2));

    PULSE->setRecMinY(60);
    PULSE->setRecMaxY(100);
    SPO2->setRecMinY(90);
    SPO2->setRecMaxY(100);

    //day->setFirst(first);
    //day->setLast(last);
    pulse->setMinY(session->Min(OXI_Pulse));
    pulse->setMaxY(session->Max(OXI_Pulse));
    spo2->setMinY(session->Min(OXI_SPO2));
    spo2->setMaxY(session->Max(OXI_SPO2));

    PULSE->setRecMinY(60);
    PULSE->setRecMaxY(100);
    SPO2->setRecMinY(90);
    SPO2->setRecMaxY(100);

    plethy->setMinX(first);
    pulse->setMinX(first);
    spo2->setMinX(first);
    PLETHY->SetMinX(first);
    CONTROL->SetMinX(first);
    PULSE->SetMinX(first);
    SPO2->SetMinX(first);

    plethy->setMaxX(last);
    pulse->setMaxX(last);
    spo2->setMaxX(last);
    PLETHY->SetMaxX(last);
    CONTROL->SetMaxX(last);
    PULSE->SetMaxX(last);
    SPO2->SetMaxX(last);

    PULSE->setDay(day);
    SPO2->setDay(day);

    for (int i = 0; i < GraphView->size(); i++) {
        (*GraphView)[i]->SetXBounds(first, last);
    }

    {
        int len = (last - first) / 1000L;
        int h = len / 3600;
        int m = (len / 60) % 60;
        int s = (len % 60);

        if (qstatus2) { qstatus2->setText(QString().sprintf("%02i:%02i:%02i", h, m, s)); }
    }

    GraphView->updateScale();
    GraphView->redraw();
}

void Oximetry::on_resetTimeButton_clicked() //revert to original session time
{
    if (oximeter->getSession()) {

        //qint64 tt=ui->dateEdit->dateTime().toTime_t()*1000;
        //qint64 offset=saved_starttime-tt;
        //oximeter->getSession()->offsetSession(offset);
        dont_update_date = false;
        //ui->dateEdit->setDateTime(QDateTime::fromTime_t(saved_starttime/1000L));
        ui->dateEdit->setDateTime(QDateTime::fromTime_t(saved_starttime / 1000L));
        dont_update_date = false;
    }
}