remotelaboratory/clients/tde/src/part/scope/part.cpp

//Author:    Timothy Pearson <kb9vqf@pearsoncomputing.net>, (C) 2012
//Copyright: See COPYING file that comes with this distribution

#include "define.h"
#include "part.h"

#include <kaboutdata.h>   //::createAboutData()
#include <kaction.h>
#include <klocale.h>
#include <kmessagebox.h>  //::start()
#include <kfiledialog.h>
#include <kparts/genericfactory.h>
#include <kstatusbar.h>
#include <kstdaction.h>
#include <tqfile.h>        //encodeName()
#include <tqtimer.h>
#include <tqvbox.h>
#include <tqsocket.h>
#include <tqmutex.h>
#include <tqgroupbox.h>
#include <tqpushbutton.h>
#include <tqeventloop.h>
#include <tqapplication.h>
#include <unistd.h>       //access()
#include <stdint.h>
#include <cmath>

#include "tracewidget.h"
#include "floatspinbox.h"
#include "layout.h"

#define NETWORK_COMM_TIMEOUT_MS 15000

/* exception handling */
struct exit_exception {
	int c;
	exit_exception(int c):c(c) { }
};

enum connectionStates {
	ScopeState_InitialRequest		= 0,
	ScopeState_ResetRequest			= 2,
	ScopeState_HorizontalDivCountRequest	= 4,
	ScopeState_VerticalDivCountRequest	= 6,
	ScopeState_ChannelCountRequest		= 8,
	ScopeState_ChannelActiveStateRequest	= 10,
	ScopeState_TraceSampleCountRequest	= 12,
	ScopeState_TraceVoltsDivRequest		= 14,
	ScopeState_TraceSecondsDivRequest	= 16,
	ScopeState_TriggerChannelRequest	= 18,
	ScopeState_TriggerLevelRequest		= 20,
	ScopeState_TraceRequest			= 50,
	ScopeState_ExternalCommandRequest	= 255
};

namespace RemoteLab {

typedef KParts::GenericFactory<RemoteLab::ScopePart> Factory;
#define CLIENT_LIBRARY "libremotelab_scope"
K_EXPORT_COMPONENT_FACTORY( libremotelab_scope, RemoteLab::Factory )


ScopePart::ScopePart( TQWidget *parentWidget, const char *widgetName, TQObject *parent, const char *name, const TQStringList& )
	: RemoteInstrumentPart( parent, name ), m_traceWidget(0), m_commHandlerState(-1), m_commHandlerMode(0), m_commHandlerCommandState(0), m_connectionActiveAndValid(false),
	m_base(0), stopTraceUpdate(false)
{
	// Initialize important base class variables
	m_clientLibraryName = CLIENT_LIBRARY;

	// Initialize mutex
	m_instrumentMutex = new TQMutex(false);

	// Initialize kpart
	setInstance(Factory::instance());
	setWidget(new TQVBox(parentWidget, widgetName));

	// Create timers
	m_forcedUpdateTimer = new TQTimer(this);
	connect(m_forcedUpdateTimer, SIGNAL(timeout()), this, SLOT(mainEventLoop()));
	m_updateTimeoutTimer = new TQTimer(this);
	connect(m_updateTimeoutTimer, SIGNAL(timeout()), this, SLOT(mainEventLoop()));

	// Initialize data
	m_hdivs = 0;
	m_vdivs = 0;
	for (int traceno=0; traceno<=MAXTRACES; traceno++) {
		m_samplesInTrace[traceno] = 0;
		m_channelActive[traceno] = false;
		m_voltsDiv[traceno] = 0;
		m_secsDiv[traceno] = 0;
	}

	// Create widgets
	m_base = new ScopeBase(widget());
	m_traceWidget = m_base->traceWidget;
	m_traceWidget->setSizePolicy(TQSizePolicy(TQSizePolicy::MinimumExpanding, TQSizePolicy::MinimumExpanding));
	m_traceWidget->setNumberOfCursors(5);
	m_traceWidget->setZoomCursorStartIndex(1);
	m_traceWidget->setCursorColor(0, TQColor(64, 255, 255));
	m_traceWidget->setCursorHighlightColor(0, TQColor(192, 255, 255));
	m_traceWidget->setCursorOrientation(0, TQt::Horizontal);
	m_traceWidget->setCursorOrientation(1, TQt::Horizontal);
	m_traceWidget->setCursorOrientation(2, TQt::Horizontal);
	m_traceWidget->setCursorOrientation(3, TQt::Vertical);
	m_traceWidget->setCursorOrientation(4, TQt::Vertical);
	m_traceWidget->setCursorEnabled(0, true);
	m_traceWidget->setCursorEnabled(1, true);
	m_traceWidget->setCursorEnabled(2, true);
	m_traceWidget->setCursorEnabled(3, true);
	m_traceWidget->setCursorEnabled(4, true);
	m_traceWidget->setCursorName(0, "Trigger");
	m_traceWidget->setCursorName(1, "Cursor H1");
	m_traceWidget->setCursorName(2, "Cursor H2");
	m_traceWidget->setCursorName(3, "Cursor V1");
	m_traceWidget->setCursorName(4, "Cursor V2");
	m_traceWidget->setCursorPosition(0, 40);
	m_traceWidget->setCursorPosition(1, 25);
	m_traceWidget->setCursorPosition(2, 75);
	m_traceWidget->setCursorPosition(3, 25);
	m_traceWidget->setCursorPosition(4, 75);
	TraceNumberList activeTraces;
	for (uint trace=0; trace<MAXTRACES; trace++) {
		activeTraces.append(trace);
	}
	m_traceWidget->setCursorActiveTraceList(1, activeTraces);
	m_traceWidget->setCursorActiveTraceList(2, activeTraces);
	m_traceWidget->setCursorActiveTraceList(3, activeTraces);
	m_traceWidget->setCursorActiveTraceList(4, activeTraces);
	m_traceWidget->setZoomBoxEnabled(true);

	m_base->traceZoomWidget->setSizePolicy(TQSizePolicy(TQSizePolicy::MinimumExpanding, TQSizePolicy::MinimumExpanding));
	connect(m_traceWidget, SIGNAL(zoomBoxChanged(const TQRectF&)), this, SLOT(updateZoomWidgetLimits(const TQRectF&)));
	connect(m_traceWidget, SIGNAL(offsetChanged(uint, double)), m_base->traceZoomWidget, SLOT(setTraceOffset(uint, double)));

	m_base->saRefLevel->setSizePolicy(TQSizePolicy(TQSizePolicy::Fixed, TQSizePolicy::Fixed));
	m_base->saRefLevel->setFloatMin(-128);
	m_base->saRefLevel->setFloatMax(128);
	m_base->saRefLevel->setLineStep(1);

	connect(m_base->acqStart, SIGNAL(clicked()), this, SLOT(startDAQ()));
	connect(m_base->acqStop, SIGNAL(clicked()), this, SLOT(stopDAQ()));

	connect(m_base->waveformSave, SIGNAL(clicked()), this, SLOT(saveWaveforms()));
	connect(m_base->waveformRecall, SIGNAL(clicked()), this, SLOT(recallWaveforms()));

	connect(m_base->saRefLevel, SIGNAL(floatValueChanged(double)), this, SLOT(saRefLevelChanged(double)));

	TQTimer::singleShot(0, this, TQT_SLOT(postInit()));
}

ScopePart::~ScopePart() {
	if (m_instrumentMutex->locked()) {
		printf("[WARNING] Exiting when data transfer still in progress!\n\r"); fflush(stdout);
	}

	disconnectFromServer();
	delete m_instrumentMutex;
}

void ScopePart::postInit() {
	setUsingFixedSize(false);
}

bool ScopePart::openURL(const KURL &url) {
	int ret;
	m_connectionActiveAndValid = false;
	ret = connectToServer(url.url());
	processLockouts();
	return (ret != 0);
}

bool ScopePart::closeURL() {
	disconnectFromServer();
	m_url = KURL();
	return true;
}

void ScopePart::processLockouts() {
	// Largest area
	if (m_connectionActiveAndValid) {
		if ((m_commHandlerMode < 2) && (m_commHandlerState < 2)) {
			m_base->setEnabled(false);
		}
		else {
			m_base->setEnabled(true);
		}
	}
	else {
		m_base->setEnabled(false);
	}

	// Middle area
	if ((m_commHandlerMode < 2) && (m_commHandlerState < 50)) {
		m_base->groupOscilloscopeTraceControls->setEnabled(false);
	}
	else {
		m_base->groupOscilloscopeTraceControls->setEnabled(true);
	}

	// Least area
	if (stopTraceUpdate) {
		m_base->acqStop->setEnabled(false);
		m_base->acqStart->setEnabled(true);
		m_base->waveformSave->setEnabled(true);
		m_base->waveformRecall->setEnabled(true);
	}
	else {
		m_base->acqStop->setEnabled(true);
		m_base->acqStart->setEnabled(false);
		m_base->waveformSave->setEnabled(false);
		m_base->waveformRecall->setEnabled(false);
	}
}

void ScopePart::disconnectFromServerCallback() {
	m_forcedUpdateTimer->stop();
	m_updateTimeoutTimer->stop();
	m_connectionActiveAndValid = false;
}

void ScopePart::connectionFinishedCallback() {
	connect(m_socket, SIGNAL(readyRead()), m_socket, SLOT(processPendingData()));
	m_socket->processPendingData();
	connect(m_socket, SIGNAL(newDataReceived()), this, SLOT(mainEventLoop()));
	m_tickerState = 0;
	m_commHandlerState = 0;
	m_commHandlerMode = 0;
	m_socket->setDataTimeout(NETWORK_COMM_TIMEOUT_MS);
	m_updateTimeoutTimer->start(NETWORK_COMM_TIMEOUT_MS, TRUE);
	processLockouts();
	mainEventLoop();
	return;
}

void ScopePart::connectionStatusChangedCallback() {
	processLockouts();
}

void ScopePart::setTickerMessage(TQString message) {
	m_connectionActiveAndValid = true;
	TQString tickerChar;
	switch (m_tickerState) {
		case 0:
			tickerChar = "-";
			break;
		case 1:
			tickerChar = "\\";
			break;
		case 2:
			tickerChar = "|";
			break;
		case 3:
			tickerChar = "/";
			break;
	}
	setStatusMessage(message + TQString("... %1").arg(tickerChar));
	m_tickerState++;
	if (m_tickerState > 3) {
		m_tickerState = 0;
	}
}

#define UPDATEDISPLAY_TIMEOUT		m_connectionActiveAndValid = false;														\
					m_tickerState = 0;																\
					m_commHandlerState = ScopeState_ResetRequest;													\
					m_commHandlerMode = 0;																\
					m_socket->clearIncomingData();															\
					setStatusMessage(i18n("Server ping timeout.  Please verify the status of your network connection."));						\
					m_updateTimeoutTimer->start(NETWORK_COMM_TIMEOUT_MS, TRUE);											\
					m_instrumentMutex->unlock();															\
					return;

#define COMMUNICATIONS_FAILED		m_connectionActiveAndValid = false;														\
					m_tickerState = 0;																\
					m_commHandlerState = ScopeState_ResetRequest;													\
					m_commHandlerMode = 0;																\
					m_socket->clearIncomingData();															\
					setStatusMessage(i18n("Instrument communication failure.  Please verify the status of your network connection."));				\
					m_updateTimeoutTimer->start(NETWORK_COMM_TIMEOUT_MS, TRUE);											\
					m_instrumentMutex->unlock();															\
					return;

#define SET_WATCHDOG_TIMER		if (!m_updateTimeoutTimer->isActive()) m_updateTimeoutTimer->start(NETWORK_COMM_TIMEOUT_MS, TRUE);
#define PAT_WATCHDOG_TIMER		m_updateTimeoutTimer->stop(); m_updateTimeoutTimer->start(NETWORK_COMM_TIMEOUT_MS, TRUE);

#define SET_NEXT_STATE(x)		if (m_commHandlerMode == 0) {															\
						m_commHandlerState = x;															\
					}																		\
					else {																		\
						m_commHandlerState = ScopeState_ExternalCommandRequest;											\
					}

#define EXEC_NEXT_STATE_IMMEDIATELY	m_forcedUpdateTimer->start(0, TRUE);

int getNextActiveChannel(int current, bool* activity, int maxtracenumber) {
	int ret = -1;
	for (int i=current+1; i<=maxtracenumber; i++) {
		if (activity[i]) {
			ret = i;
			break;
		}
	}
	return ret;
}

void ScopePart::mainEventLoop() {
	TQDataStream ds(m_socket);
	ds.setPrintableData(true);

	if (!m_instrumentMutex->tryLock()) {
		EXEC_NEXT_STATE_IMMEDIATELY
		return;
	}

	if (m_socket) {
		if ((m_commHandlerMode == 0) || (m_commHandlerMode == 1)) {
			if (m_commHandlerState == ScopeState_InitialRequest) {
				// Request scope access
				ds << TQString("OSCILLOSCOPE");
				m_socket->writeEndOfFrame();

				m_commHandlerState = ScopeState_InitialRequest+1;
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerState == ScopeState_InitialRequest+1) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Connected"));
	
					// Get command status
					TQString result;
					ds >> result;
					m_socket->clearFrameTail();
	
					if (result == "ACK") {
						SET_NEXT_STATE(ScopeState_ResetRequest)
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerState == ScopeState_ResetRequest) {
				// Reset scope
				ds << TQString("RESET");
				m_socket->writeEndOfFrame();

				SET_NEXT_STATE(ScopeState_ResetRequest+1)
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerState == ScopeState_ResetRequest+1) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Loading [Reset complete]"));
	
					// Get command status
					TQString result;
					ds >> result;
					m_socket->clearFrameTail();
	
					if (result == "ACK") {
						SET_NEXT_STATE(ScopeState_HorizontalDivCountRequest)
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerState == ScopeState_HorizontalDivCountRequest) {
				// Get number of horizontal divisions, step 1
				ds << TQString("GETHORIZONTALDIVCOUNT");
				m_socket->writeEndOfFrame();

				SET_NEXT_STATE(ScopeState_HorizontalDivCountRequest+1)
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerState == ScopeState_HorizontalDivCountRequest+1) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Loading [Received horizontal division count]"));

					// Get number of horizontal divisions, step 2
					TQString result;
					ds >> result;
					if (result == "ACK") {
						ds >> m_hdivs;
					}
					m_socket->clearFrameTail();

					if (result == "ACK") {
						SET_NEXT_STATE(ScopeState_VerticalDivCountRequest)
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerState == ScopeState_VerticalDivCountRequest) {
				// Get number of vertical divisions, step 1
				ds << TQString("GETVERTICALDIVCOUNT");
				m_socket->writeEndOfFrame();

				SET_NEXT_STATE(ScopeState_VerticalDivCountRequest+1)
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerState == ScopeState_VerticalDivCountRequest+1) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Loading [Received vertical division count]"));

					// Get number of vertical divisions, step 2
					TQString result;
					ds >> result;
					if (result == "ACK") {
						ds >> m_vdivs;
					}
					m_socket->clearFrameTail();
	
					if (result == "ACK") {
						SET_NEXT_STATE(ScopeState_ChannelCountRequest)
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerState == ScopeState_ChannelCountRequest) {
				// Get number of channels, step 1
				ds << TQString("GETNUMBEROFCHANNELS");
				m_socket->writeEndOfFrame();

				SET_NEXT_STATE(ScopeState_ChannelCountRequest+1)
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerState == ScopeState_ChannelCountRequest+1) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Loading [Received number of channels]"));
	
					// Get number of channels, step 2
					TQString result;
					ds >> result;
					if (result == "ACK") {
						ds >> m_maxNumberOfTraces;
						if (m_maxNumberOfTraces > MAXTRACES) {
							m_maxNumberOfTraces = MAXTRACES;
						}
					}
					m_socket->clearFrameTail();
	
					if (result == "ACK") {
						m_currentOpChannel = 1;
						SET_NEXT_STATE(ScopeState_ChannelActiveStateRequest)
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerState == ScopeState_ChannelActiveStateRequest) {
				// Get channel status, step 1
				ds << TQString("GETCHANNELACTIVE");
				ds << m_currentOpChannel;
				m_socket->writeEndOfFrame();

				SET_NEXT_STATE(ScopeState_ChannelActiveStateRequest+1)
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerState == ScopeState_ChannelActiveStateRequest+1) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Loading [Received channel %1 activity status]").arg(m_currentOpChannel));

					// Get channel status, step 2
					TQString result;
					ds >> result;
					if (result == "ACK") {
						TQ_INT16 active;
						ds >> active;
						m_channelActive[m_currentOpChannel] = (active != 0);
					}
					m_socket->clearFrameTail();
	
					if (result == "ACK") {
						if (m_currentOpChannel < m_maxNumberOfTraces) {
							m_currentOpChannel++;
							SET_NEXT_STATE(ScopeState_ChannelActiveStateRequest)
						}
						else {
							m_currentOpChannel = getNextActiveChannel(0, m_channelActive, m_maxNumberOfTraces);
							if (m_currentOpChannel > 0) {
								SET_NEXT_STATE(ScopeState_TraceSampleCountRequest)
							}
							else {
								m_currentOpChannel = 1;
								SET_NEXT_STATE(ScopeState_ChannelCountRequest)
							}
						}
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerState == ScopeState_TraceSampleCountRequest) {
				// Get number of samples in trace, step 1
				ds << TQString("GETTRACESAMPLECOUNT");
				ds << m_currentOpChannel;
				m_socket->writeEndOfFrame();

				SET_NEXT_STATE(ScopeState_TraceSampleCountRequest+1)
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerState == ScopeState_TraceSampleCountRequest+1) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Loading [Received trace sample count for channel %1]").arg(m_currentOpChannel));
	
					// Get number of samples in trace, step 2
					TQString result;
					ds >> result;
					if (result == "ACK") {
						ds >> m_samplesInTrace[m_currentOpChannel];
					}
					m_socket->clearFrameTail();
	
					if (result == "ACK") {
						m_currentOpChannel = getNextActiveChannel(m_currentOpChannel, m_channelActive, m_maxNumberOfTraces);
						if (m_currentOpChannel > 0) {
							SET_NEXT_STATE(ScopeState_TraceSampleCountRequest)
						}
						else {
							m_currentOpChannel = getNextActiveChannel(0, m_channelActive, m_maxNumberOfTraces);
							SET_NEXT_STATE(ScopeState_TraceVoltsDivRequest)
						}
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerState == ScopeState_TraceVoltsDivRequest) {
				// Get volts per division, step 1
				ds << TQString("GETVOLTSDIV");
				ds << m_currentOpChannel;
				m_socket->writeEndOfFrame();

				SET_NEXT_STATE(ScopeState_TraceVoltsDivRequest+1)
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerState == ScopeState_TraceVoltsDivRequest+1) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Loading [Received volts/div for channel %1]").arg(m_currentOpChannel));
	
					// Get volts per division, step 2
					TQString result;
					ds >> result;
					if (result == "ACK") {
						ds >> m_voltsDiv[m_currentOpChannel];
					}
					m_socket->clearFrameTail();
	
					if (result == "ACK") {
						m_currentOpChannel = getNextActiveChannel(m_currentOpChannel, m_channelActive, m_maxNumberOfTraces);
						if (m_currentOpChannel > 0) {
							SET_NEXT_STATE(ScopeState_TraceVoltsDivRequest)
						}
						else {
							m_currentOpChannel = getNextActiveChannel(0, m_channelActive, m_maxNumberOfTraces);
							SET_NEXT_STATE(ScopeState_TraceSecondsDivRequest)
						}
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerState == ScopeState_TraceSecondsDivRequest) {
				// Get seconds per division, step 1
				ds << TQString("GETSECONDSSDIV");
				ds << m_currentOpChannel;
				m_socket->writeEndOfFrame();

				SET_NEXT_STATE(ScopeState_TraceSecondsDivRequest+1)
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerState == ScopeState_TraceSecondsDivRequest+1) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Loading [Received seconds/div]"));

					// Get seconds per division, step 2
					TQString result;
					ds >> result;
					if (result == "ACK") {
						ds >> m_secsDiv[m_currentOpChannel];
					}
					m_socket->clearFrameTail();

					if (result == "ACK") {
						m_currentOpChannel = getNextActiveChannel(m_currentOpChannel, m_channelActive, m_maxNumberOfTraces);
						if (m_currentOpChannel > 0) {
							SET_NEXT_STATE(ScopeState_TraceSecondsDivRequest)
						}
						else {
							SET_NEXT_STATE(ScopeState_TriggerChannelRequest)
						}
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerState == ScopeState_TriggerChannelRequest) {
				// Get trigger channel, step 1
				ds << TQString("GETTRIGGERCHANNEL");
				ds << m_currentOpChannel;
				m_socket->writeEndOfFrame();

				SET_NEXT_STATE(ScopeState_TriggerChannelRequest+1)
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerState == ScopeState_TriggerChannelRequest+1) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Loading [Received trigger channel]"));

					// Get trigger channel, step 2
					TQString result;
					ds >> result;
					if (result == "ACK") {
						ds >> m_triggerChannel;
					}
					m_socket->clearFrameTail();
	
					if (result == "ACK") {
						SET_NEXT_STATE(ScopeState_TriggerLevelRequest)
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerState == ScopeState_TriggerLevelRequest) {
				// Get trigger level, step 1
				ds << TQString("GETTRIGGERLEVEL");
				ds << m_currentOpChannel;
				m_socket->writeEndOfFrame();

				SET_NEXT_STATE(ScopeState_TriggerLevelRequest+1)
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerState == ScopeState_TriggerLevelRequest+1) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Loading [Received trigger level]"));

					// Get trigger level, step 2
					TQString result;
					ds >> result;
					if (result == "ACK") {
						ds >> m_triggerLevel;
					}
					m_socket->clearFrameTail();
	
					if (result == "ACK") {
						// Update display widget(s)
						updateGraticule();
						// HACK
						// Force resize of parent frame
						emit(resizeToHintRequested());
					}

					if (result == "ACK") {
						m_currentOpChannel = getNextActiveChannel(0, m_channelActive, m_maxNumberOfTraces);
						SET_NEXT_STATE(ScopeState_TraceRequest)
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerState == ScopeState_TraceRequest) {
				// Get trace, step 1
				ds << TQString("GETCHANNELTRACE");
				ds << m_currentOpChannel;
				m_socket->writeEndOfFrame();

				SET_NEXT_STATE(ScopeState_TraceRequest+1)
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerState == ScopeState_TraceRequest+1) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Running [Received trace for channel %1]").arg(m_currentOpChannel));

					// Get trace, step 2
					TQDoubleArray trace;
					TQDoubleArray positions;
					TQString result;
					ds >> result;
					if (result == "ACK") {
						ds >> trace;
						ds >> positions;
					}
					m_socket->clearFrameTail();

					if (result == "ACK") {
						// Update display widget(s)
						m_traceWidget->setSamples(m_currentOpChannel-1, trace);
						m_traceWidget->setPositions(m_currentOpChannel-1, positions);
						m_base->traceZoomWidget->setSamples(m_currentOpChannel-1, trace);
						m_base->traceZoomWidget->setPositions(m_currentOpChannel-1, positions);
						postProcessTrace();
						m_traceWidget->repaint(false);
						m_base->traceZoomWidget->repaint(false);
					}

					if (result == "ACK") {
						m_currentOpChannel = getNextActiveChannel(m_currentOpChannel, m_channelActive, m_maxNumberOfTraces);
						if (m_currentOpChannel > 0) {
							SET_NEXT_STATE(ScopeState_TraceRequest)
						}
						else {
							m_currentOpChannel = getNextActiveChannel(0, m_channelActive, m_maxNumberOfTraces);
							SET_NEXT_STATE(ScopeState_TraceRequest)
						}
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerState == ScopeState_ExternalCommandRequest) {
				// Execute pending command
				m_commHandlerMode = 2;
				m_socket->clearIncomingData();
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			SET_WATCHDOG_TIMER
		}
		else if (m_commHandlerMode == 2) {
			if (m_commHandlerCommandState == 0) {
				m_commHandlerMode = 0;
				m_commHandlerState = ScopeState_ChannelActiveStateRequest;
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerCommandState == 1) {
				// Set channel active
				ds << TQString("SETCHANNELACTIVE");
				ds << m_nextOpChannel;
				ds << m_nextOpParameter16;
				m_socket->writeEndOfFrame();

				m_commHandlerCommandState = 2;
				EXEC_NEXT_STATE_IMMEDIATELY
			}
			else if (m_commHandlerCommandState == 2) {
				// Get response data
				if (m_socket->canReadFrame()) {
					PAT_WATCHDOG_TIMER
					setTickerMessage(i18n("Connected"));

					// Set channel active, step 2
					TQString result;
					ds >> result;
					m_socket->clearFrameTail();
	
					if (result == "ACK") {
						m_commHandlerCommandState = 0;
						EXEC_NEXT_STATE_IMMEDIATELY
					}
					else {
						COMMUNICATIONS_FAILED
					}
				}
				else {
					if (!m_updateTimeoutTimer->isActive()) {
						UPDATEDISPLAY_TIMEOUT
					}
				}
			}
			else if (m_commHandlerCommandState == 3) {
				if (stopTraceUpdate == false) {
					m_commHandlerCommandState = 0;
					EXEC_NEXT_STATE_IMMEDIATELY
				}
				else {
					setTickerMessage(i18n("Data acquisition stopped"));
				}
			}
		}
	}
	else {
		m_commHandlerState = ScopeState_ResetRequest;
		m_commHandlerCommandState = 0;
	}

	processLockouts();

	m_instrumentMutex->unlock();
}

void ScopePart::postProcessTrace() {
	return;
}

void ScopePart::startDAQ() {
	stopTraceUpdate = false;
	EXEC_NEXT_STATE_IMMEDIATELY
}

void ScopePart::stopDAQ() {
	if (m_commHandlerMode < 2) {
		stopTraceUpdate = true;
		m_commHandlerMode = 1;
		m_commHandlerCommandState = 3;
		mainEventLoop();
	}
}

#define WAVEFORM_MAGIC_NUMBER 1
#define WAVEFORM_FILE_VERSION 1

void ScopePart::saveWaveforms() {
	TQString saveFileName = KFileDialog::getSaveFileName(TQString::null, "*.wfm|Waveform Files (*.wfm)", 0, i18n("Save waveforms..."));
	if (saveFileName != "") {
		TQFile file(saveFileName);
		file.open(IO_WriteOnly);
		TQDataStream ds(&file);
		TQ_INT32 magicNumber = WAVEFORM_MAGIC_NUMBER;
		TQ_INT32 version = WAVEFORM_FILE_VERSION;
		ds << magicNumber;
		ds << version;
		ds << m_hdivs;
		ds << m_vdivs;
		ds << m_maxNumberOfTraces;
		for (int traceno=1; traceno<=m_maxNumberOfTraces; traceno++) {
			TQ_UINT8 boolValue;
			boolValue = m_channelActive[traceno];
			ds << boolValue;
			ds << m_samplesInTrace[traceno];
			ds << m_voltsDiv[traceno];
			ds << m_secsDiv[traceno];
			ds << m_traceWidget->samples(traceno-1);
			ds << m_traceWidget->positions(traceno-1);
		}
		for (int cursorno=0; cursorno<4; cursorno++) {
			ds << m_traceWidget->cursorPosition(cursorno);
		}
	}
}

void ScopePart::recallWaveforms() {
	TQString openFileName = KFileDialog::getOpenFileName(TQString::null, "*.wfm|Waveform Files (*.wfm)", 0, i18n("Open waveforms..."));
	if (openFileName != "") {
		TQFile file(openFileName);
		file.open(IO_ReadOnly);
		TQDataStream ds(&file);
		TQ_INT32 magicNumber;
		TQ_INT32 version;
		ds >> magicNumber;
		if (magicNumber == WAVEFORM_MAGIC_NUMBER) {
			ds >> version;
			if (version == WAVEFORM_FILE_VERSION) {
				ds >> m_hdivs;
				ds >> m_vdivs;
				ds >> m_maxNumberOfTraces;
				for (int traceno=1; traceno<=m_maxNumberOfTraces; traceno++) {
					TQ_UINT8 boolValue;
					ds >> boolValue;
					m_channelActive[traceno] = (boolValue!=0)?true:false;
					ds >> m_samplesInTrace[traceno];
					ds >> m_voltsDiv[traceno];
					ds >> m_secsDiv[traceno];
					TQDoubleArray values;
					TQDoubleArray positions;
					ds >> values;
					ds >> positions;
					m_traceWidget->setSamples(traceno-1, values);
					m_traceWidget->setPositions(traceno-1, positions);
					m_base->traceZoomWidget->setSamples(traceno-1, values);
					m_base->traceZoomWidget->setPositions(traceno-1, positions);
				}
				for (int cursorno=0; cursorno<4; cursorno++) {
					double cursorPos;
					ds >> cursorPos;
					m_traceWidget->setCursorPosition(cursorno, cursorPos);
				}
				updateGraticule();
				postProcessTrace();
				// HACK
				// Force resize of parent frame
				emit(resizeToHintRequested());
				m_traceWidget->repaint(false);
				m_base->traceZoomWidget->repaint(false);
			}
			else {
				KMessageBox::error(0, i18n("<qt>The selected waveform file version does not match this client</qt>"), i18n("Invalid File"));
			}
		}
		else {
			KMessageBox::error(0, i18n("<qt>Invalid waveform file selected</qt>"), i18n("Invalid File"));
		}
	}
}

void ScopePart::updateZoomWidgetLimits(const TQRectF& zoomRect) {
	for (int traceno=0; traceno<m_maxNumberOfTraces; traceno++) {
		TQRectF fullZoomRect = m_traceWidget->displayLimits(traceno);
		double widthSpan = fullZoomRect.width()-fullZoomRect.x();
		double heightSpan = fullZoomRect.height()-fullZoomRect.y();

		TQRectF zoomLimitsRect((fullZoomRect.x()+(widthSpan*(zoomRect.x()/100.0))), (fullZoomRect.y()+(heightSpan*(zoomRect.y()/100.0))), (fullZoomRect.x()+(widthSpan*((zoomRect.x()/100.0)+(zoomRect.width()/100.0)))), (fullZoomRect.y()+(heightSpan*((zoomRect.y()/100.0)+(zoomRect.height()/100.0)))));

		m_base->traceZoomWidget->setDisplayLimits(traceno, zoomLimitsRect);
	}
}

void ScopePart::updateGraticule() {
	m_traceWidget->setNumberOfHorizontalDivisions(m_hdivs);
	m_traceWidget->setNumberOfVerticalDivisions(m_vdivs);
	m_base->traceZoomWidget->setNumberOfHorizontalDivisions(m_hdivs);
	m_base->traceZoomWidget->setNumberOfVerticalDivisions(m_vdivs);

	TraceNumberList activeTraces;
	activeTraces.append(m_triggerChannel-1);
	m_traceWidget->setCursorActiveTraceList(0, activeTraces);
	m_traceWidget->setCursorPosition(0, (50.0-((m_triggerLevel*100.0)/(m_voltsDiv[m_triggerChannel]*m_vdivs))));

	m_traceWidget->setTraceColor(0, TQColor(255, 255, 255));
	m_traceWidget->setTraceColor(1, TQColor(128, 255, 128));
	m_traceWidget->setTraceColor(2, TQColor(255, 255, 128));
	m_traceWidget->setTraceColor(3, TQColor(128, 128, 255));

	m_base->traceZoomWidget->setTraceColor(0, TQColor(255, 255, 255));
	m_base->traceZoomWidget->setTraceColor(1, TQColor(128, 255, 128));
	m_base->traceZoomWidget->setTraceColor(2, TQColor(255, 255, 128));
	m_base->traceZoomWidget->setTraceColor(3, TQColor(128, 128, 255));

	for (int traceno=1; traceno<=m_maxNumberOfTraces; traceno++) {
		m_traceWidget->setTraceEnabled(traceno-1, m_channelActive[traceno]);
		m_traceWidget->setTraceName(traceno-1, TQString("Channel %1").arg(traceno));
		m_traceWidget->setTraceHorizontalUnits(traceno-1, "s");
		m_traceWidget->setTraceVerticalUnits(traceno-1, "V");

		m_base->traceZoomWidget->setTraceEnabled(traceno-1, m_channelActive[traceno], false);
		m_base->traceZoomWidget->setTraceName(traceno-1, TQString("Channel %1").arg(traceno));
		m_base->traceZoomWidget->setTraceHorizontalUnits(traceno-1, "s");
		m_base->traceZoomWidget->setTraceVerticalUnits(traceno-1, "V");

		m_traceWidget->setNumberOfSamples(traceno-1, m_samplesInTrace[traceno]);
		m_base->traceZoomWidget->setNumberOfSamples(traceno-1, m_samplesInTrace[traceno]);

		m_traceWidget->setDisplayLimits(traceno-1, TQRectF(0.0, (m_voltsDiv[traceno]*m_vdivs)/2.0, (m_secsDiv[traceno]*m_hdivs), (m_voltsDiv[traceno]*m_vdivs)/-2.0));
	}
	updateZoomWidgetLimits(m_traceWidget->zoomBox());

// 	// Also update controls
// 	m_base->saRefLevel->blockSignals(true);
// 	m_base->saRefLevel->setFloatValue(m_voltsDiv);
// 	m_base->saRefLevel->blockSignals(false);
}

void ScopePart::saRefLevelChanged(double newval) {
// 	if (m_commHandlerMode < 2) {
// 		m_voltsDiv = newval;
// 		m_commHandlerMode = 1;
// 		m_commHandlerCommandState = 1;
// 		mainEventLoop();
// 	}
}

KAboutData* ScopePart::createAboutData() {
	return new KAboutData( APP_NAME, I18N_NOOP( APP_PRETTYNAME ), APP_VERSION );
}

} //namespace RemoteLab

#include "part.moc"