source: Evidence/Edd/Edd.cc@ 324

/* ============================================================ 

Edd - Evidence Data Display

Qt-based graphical user interface for the Evidence contron system

EddLineDisplay changes its background colour in case it display
a DIM status service

April 2010, Oliver Grimm

============================================================ */

#include "Edd.h"

Qt::GlobalColor LineColors[] = {Qt::black, Qt::blue, Qt::red, Qt::green, Qt::white,
        Qt::darkRed, Qt::darkGreen, Qt::darkBlue, Qt::cyan,
        Qt::darkCyan, Qt::magenta, Qt::darkMagenta,
        Qt::gray, Qt::darkGray, Qt::lightGray};


class EddDim *Handler;


// History chooser function (opens plot for numeric data, TextHist for all other)
QWidget *OpenHistory(char *Service, int Index) {

  QString Format;
  DimBrowser Browser;
  class EvidenceHistory *Hist = Handler->GetHistory(Service);

  // Check if history service available
  if (Hist == NULL || Hist->GetFormat() == NULL) {
        QMessageBox::warning(NULL, "Edd Message", QString("Could not retrieve history for service ") + Service ,QMessageBox::Ok);

        // If service currently available, take its format
        char *Name, *Fmt;

        Browser.getServices(Service);
        if (Browser.getNextService(Name, Fmt) != 0) Format = QString(Fmt);
        else {
          Handler->DropHistory(Service);
          return NULL;
        }
  }

  if (Format.isEmpty()) Format = Hist->GetFormat();
  Handler->DropHistory(Service);
  
  if (Format.size() == 1 && Format[0] != 'C') return new EddPlot(Service, Index);
  else return new EddText(Service);
}

// Set status tip (returns true if service was available)
bool SetStatus(QWidget *W, QString Name, int Time, QString Format, int Index) {

  QString Status;

  if (Index != -1) Name = Name + "(" + QString::number(Index) + ")";

  if (Time == -1) Status = QString("%1:  unavailable").arg(Name);
  else Status = QString("%1:  Last update %2   Format '%3'").arg(Name).arg(QDateTime::fromTime_t(Time).toString()).arg(Format); 

  W->setStatusTip(Status);
  
  return(Time != -1);
}


//////////////////////////////////////////
// Text display for arbitary DIM service//
//////////////////////////////////////////

EddLineDisplay::EddLineDisplay(QString Name, int Index, QWidget *P):
        QLineEdit(P), ServiceName(Name), Index(Index) {

  LastHist = NULL;
 
  // Widget properties
  setReadOnly(true);
  setMaximumWidth(100);
  ShowAsTime = false;
  setFrame(false);
  setAttribute(Qt::WA_DeleteOnClose);
  
  // Connect to DIM handler
  if (connect(Handler, SIGNAL(YEP(QString, int, QByteArray, QString, QString)), SLOT(Update(QString, int, QByteArray, QString, QString))) == false) {
    printf("Failed connection for %s\n", Name.toAscii().data());
  }

  // Context menu
  Menu = new QMenu(this);
  Menu->addAction("Open new history", this, SLOT(MenuOpenHistory()));
  Menu->addAction("Copy service", this, SLOT(MenuCopyService()));
  Menu->addAction("Copy data", this, SLOT(MenuCopyData()));

  // Subscribe to service
  Handler->Subscribe(Name);
}

// Destructor
EddLineDisplay::~EddLineDisplay() {

  Handler->Unsubscribe(ServiceName);
}

// Update widget
void EddLineDisplay::Update(QString Name, int Time, QByteArray, QString Format, QString Text) {

  if (ServiceName != Name) return;

  // Check if service available
  QPalette Pal = palette();  
  if (!SetStatus(this, Name, Time, Format, Index)) {
    setText("n/a");
    Pal.setColor(QPalette::Base, Qt::lightGray);
        setPalette(Pal);
        return;
  }
  else Pal.setColor(QPalette::Base, Qt::white);

  // Message service backgound colour determined by severity 
  if (Name.endsWith("/Message")) {
    switch (Text.section(' ', 0, 0).toInt()) {
      case 0:  Pal.setColor(QPalette::Base, Qt::white); break;
      case 1:  Pal.setColor(QPalette::Base, Qt::yellow); break;
      case 2:  Pal.setColor(QPalette::Base, Qt::red); break;
      case 3:  Pal.setColor(QPalette::Base, Qt::red); break;
      default: break;
    }
        Text = Text.section(' ', 1);
  }
  else if (Format[0].toUpper() != 'C' && Format != "I:1;C") Text = Text.section(' ', Index, Index);

  if (!ShowAsTime) setText(Text);
  else setText(QDateTime::fromTime_t(Text.toInt()).toString());

  setCursorPosition(0);  
  setPalette(Pal);
}

// Open plot if mouse release within widget
void EddLineDisplay::mouseReleaseEvent(QMouseEvent *Event) {

  if (Event->button()!=Qt::LeftButton || !contentsRect().contains(Event->pos())) return;

  // Check if last history plot still open, then raise
  foreach (QWidget *Widget, QApplication::allWidgets()) {
    if (Widget == LastHist) {
      Widget->activateWindow();
      Widget->raise();
      return;
    }
  }

  // If not, open new plot
  EddLineDisplay::MenuOpenHistory();
}

// Handling of mouse press event: Register start position for drag
void EddLineDisplay::mousePressEvent(QMouseEvent *Event) {

  if (Event->button() == Qt::LeftButton) dragStart = Event->pos();
}

// Handling of dragging (Drag and MimeData will be deleted by Qt)
void EddLineDisplay::mouseMoveEvent(QMouseEvent *Event) {

  if ((Event->buttons() & Qt::LeftButton) == 0) return;
  if ((Event->pos()-dragStart).manhattanLength() < QApplication::startDragDistance()) return;

  QDrag *Drag = new QDrag(this);
  QMimeData *MimeData = new QMimeData;
  QByteArray Data;
  MimeData->setData("Edd/Service", Data.append(ServiceName + " " + QString::number(Index)));
  Drag->setMimeData(MimeData);
  Drag->exec();
}

//
// Opening context menu
//
void EddLineDisplay::contextMenuEvent(QContextMenuEvent *Event) {

  Menu->exec(Event->globalPos());
}

// Menu: Open history plot
void EddLineDisplay::MenuOpenHistory() {
  
  LastHist = OpenHistory(ServiceName.toAscii().data(), Index);
  if (LastHist != NULL) LastHist->show();
}

// Menu: Copy service name
void EddLineDisplay::MenuCopyService() {
  
  QMimeData *MimeData = new QMimeData;
  QByteArray Data;
  MimeData->setData("Edd/Service", Data.append(ServiceName + " " + QString::number(Index)));
  QApplication::clipboard()->setMimeData(MimeData);
}

// Menu: Copy data
void EddLineDisplay::MenuCopyData() {

  QApplication::clipboard()->setText(text());
}


//////////////////////////////////////////
// Sending string command to DIM server //
//////////////////////////////////////////

EddCommand::EddCommand(QString Name, QWidget *P): QLineEdit(P), Name(Name) {

  setToolTip("Send command "+Name);  
  connect(this, SIGNAL(returnPressed()), SLOT(SendCommand()));
}

// Send command
void EddCommand::SendCommand() {

  DimClient::sendCommand(Name.toAscii().data(), text().toAscii().data());
  clear();
}


//////////////////////////////////
// History plot for DIM service //
//////////////////////////////////

EddPlot::EddPlot(QString Service, int Index, QWidget *P): EddBasePlot(P) {

  // Widget properties
  setAcceptDrops(true);
  setAxisScaleDraw(QwtPlot::xBottom, new EddTimeScale);
        
  // Update time range on plot when axis change (update() results in paintEvent())
  connect(axisWidget(QwtPlot::xBottom), SIGNAL(scaleDivChanged()), SLOT(update()));

  legend()->setItemMode(QwtLegend::ClickableItem);
  connect(this, SIGNAL(legendClicked (QwtPlotItem *)), SLOT(LegendClicked(QwtPlotItem *)));
  
  // Connect to DIM handler
  if (connect(Handler, SIGNAL(YEP(QString, int, QByteArray, QString, QString)), SLOT(Update(QString, int, QByteArray, QString, QString))) == false) {
    printf("Failed connection for %s\n", Service.toAscii().data());
  }

  // Additonal context menu items
  QAction* Action = Menu->addAction("Paste service", this, SLOT(MenuPasteService()));
  Menu->removeAction(Action);
  Menu->insertAction(Menu->actions().value(1), Action);
  
  // Maximum number if points in curve (will be increased in Update())
  SizeLimit = 0;

  // DIM client
  if (!Service.isEmpty()) AddService(Service, Index);
}

// Destructor (items with parent widget are automatically deleted)
EddPlot::~EddPlot() {

  while (!List.isEmpty()) DeleteCurve(List.last().Signal);
}

// Add history service to plot
void EddPlot::AddService(QString Name, int Index) {

  // Check if curve already present on plot
  for (int i=0; i<List.size(); i++) {
    if (Name == List[i].Name && Index == List[i].Index) {
      QMessageBox::warning(this, "Edd Message",Name+" ("+QString::number(Index)+") already present",QMessageBox::Ok);
      return;
    }
  }  
  
  // Generate new curve and subscribe to service
  struct ItemDetails N;

  N.Name = Name;
  N.Signal = NewCurve(Name+"("+QString::number(Index)+")");
  N.Index = Index;
  List.append(N);

  Handler->Subscribe(Name);
}

// Update widget (must happen in GUI thread)
void EddPlot::Update(QString Name, int Time, QByteArray, QString Format, QString Text) {

  // Determine which plot item this call belongs to
  int ItemNo;
  for (ItemNo=0; ItemNo<List.size(); ItemNo++) if (List[ItemNo].Name == Name) {

        // If size limit reached, clear buffer
    if (List[ItemNo].Signal->dataSize() > SizeLimit) List[ItemNo].Signal->setData(QPolygonF());

        // If buffer empty, request new history buffer
    if (List[ItemNo].Signal->dataSize() == 0) {
          int Count=0;
          const struct EvidenceHistory::Item *R;
          class EvidenceHistory *Hist;

          if ((Hist = Handler->GetHistory(List[ItemNo].Name)) != NULL) {
                double Number=0;
                while ((R=Hist->Next()) != NULL) {
                  switch (*(Hist->GetFormat())) {
                case 'I':
                        case 'L':  Number = *((int *) R->Data + List[ItemNo].Index);   break;
                case 'S':  Number = *((short *) R->Data + List[ItemNo].Index);   break;
                case 'F':  Number = *((float *) R->Data + List[ItemNo].Index);   break;
                case 'D':  Number = *((double *) R->Data + List[ItemNo].Index);   break;
                case 'X':  Number = *((long long *) R->Data + List[ItemNo].Index);   break;
                default: break;
                  }
                  AddPoint(ItemNo, R->Time, Number);
                  Count++;
                }

                // Local buffer at least twice as large as longest history
                if (SizeLimit < 2*Count) SizeLimit = 2*Count;
          }
          Handler->DropHistory(List[ItemNo].Name);
        }

        // Append data only if service available
        if (SetStatus(this, Name, Time, Format)) {
          QString Txt = Text;
          Txt = Txt.section(' ', List[ItemNo].Index, List[ItemNo].Index);
      AddPoint(ItemNo, Time, atof(Txt.toAscii().data()));
        }
  }

  UpdatePlot();
}


// Add text indicating time range to plot
void EddPlot::paintEvent(QPaintEvent *) {

  QString Text;
  QFont Font;
  QPainter Painter(this);
  
  Text = QDateTime::fromTime_t((int) axisScaleDiv(QwtPlot::xBottom)->lowerBound()).toString("d-MMM-yyyy hh:mm:ss") + " to " + QDateTime::fromTime_t((int) axisScaleDiv(QwtPlot::xBottom)->upperBound()).toString("d-MMM-yyyy hh:mm:ss");

  Font.setPointSize(6);  
  Painter.setFont(Font);
  Painter.drawText(0, height(), Text);
}

// Drag and drop methods
void EddPlot::dragEnterEvent(QDragEnterEvent *Event) {
    
  if (Event->mimeData()->hasFormat("Edd/Service")) Event->acceptProposedAction();
}

void EddPlot::dropEvent(QDropEvent *Event) {

  QByteArray D(Event->mimeData()->data("Edd/Service"));
  AddService(D.left(D.lastIndexOf(' ')), D.right(D.size()-D.lastIndexOf(' ')).toInt());
}

void EddPlot::LegendClicked(QwtPlotItem *Item) {

  QString D(Item->title().text());
  D.replace('(',' ').chop(1);
  
  QDrag *Drag = new QDrag(this);
  QMimeData *MimeData = new QMimeData;
  QByteArray Data;
  MimeData->setData("Edd/Service", Data.append(D));
  Drag->setMimeData(MimeData);
  Drag->exec();
}

// Add new service by pasting name
void EddPlot::MenuPasteService() {

  const QMimeData *D = QApplication::clipboard()->mimeData();
  if (!D->hasFormat("Edd/Service")) return;
  
  QByteArray E(D->data("Edd/Service"));
  AddService(E.left(E.lastIndexOf(' ')), E.right(E.size()-E.lastIndexOf(' ')).toInt());
}

// Remove list entry
void EddPlot::DeleteCurve(QwtPlotCurve *Curve) {

  for (int i=0; i<List.size(); i++) if (List[i].Signal == Curve) {
    Handler->Unsubscribe(List[i].Name);
    List.removeAt(i);
  }
}


//////////////////
// General plot //
//////////////////

// Constructor (all slots called in GUI thread, therefore no mutex necessary)
EddBasePlot::EddBasePlot(QWidget *P): QwtPlot(P) {

  // Widget properties
  setAttribute(Qt::WA_DeleteOnClose);
  setAutoReplot(false);
  setCanvasBackground(EddPlotBackgroundColor);
  setMargin(15);

  // Plot navigation
  Zoomer = new QwtPlotZoomer(QwtPlot::xBottom,QwtPlot::yLeft,canvas());
  connect(Zoomer, SIGNAL(zoomed(const QwtDoubleRect &)), this, SLOT(HandleZoom(const QwtDoubleRect &)));

  Magnifier = new QwtPlotMagnifier(canvas());
  Magnifier->setMouseButton(Qt::NoButton,Qt::NoButton);
  Magnifier->setZoomInKey(Qt::Key_M, Qt::NoModifier);
  Magnifier->setZoomOutKey(Qt::Key_M, Qt::ShiftModifier);

  Panner = new QwtPlotPanner(canvas());
  Panner->setMouseButton(Qt::LeftButton, Qt::ShiftModifier);

  Picker = new QwtPicker(QwtPicker::CornerToCorner|QwtPicker::RectSelection, QwtPicker::RectRubberBand, QwtPicker::AlwaysOff, this);
  connect(Picker, SIGNAL(selected(const QwtPolygon &)), SLOT(MouseSelection(const QwtPolygon &)));

  // Grid and legend
  Grid = new QwtPlotGrid;
  Grid->setMajPen(QPen(Qt::gray, 0, Qt::DotLine));
  Grid->attach(this);
  
  insertLegend(new QwtLegend(), QwtPlot::TopLegend, 0.3);

  // Context menu
  Menu = new QMenu(this);
  StripAction = Menu->addAction("Stripchart", this, SLOT(UpdatePlot()));
  StripAction->setCheckable(true);
  Menu->addSeparator();
  YLogAction = Menu->addAction("y scale log", this, SLOT(UpdatePlot()));
  YLogAction->setCheckable(true);
  NormAction = Menu->addAction("Normalize", this, SLOT(UpdatePlot()));
  NormAction->setCheckable(true);
  StyleAction = Menu->addAction("Draw dots", this, SLOT(UpdatePlot()));
  StyleAction->setCheckable(true);
  Menu->addAction("Zoom out", this, SLOT(MenuZoomOut()));
  Menu->addAction("Single trace", this, SLOT(MenuSingleTrace()));
  Menu->addSeparator();
  Menu->addAction("Save as ASCII", this, SLOT(MenuSaveASCII()));
  Menu->addAction("Save plot", this, SLOT(MenuSave()));
  Menu->addAction("Print plot", this, SLOT(MenuPrint()));
  Menu->addAction("Plot help", this, SLOT(MenuPlotHelp()));
}

// Destructor (items with parent widget are automatically deleted)
EddBasePlot::~EddBasePlot() {

  for (int i=0; i<Items.size(); i++) delete Items[i].Signal;
  delete Grid;
}

// Update all curves in plot
void EddBasePlot::UpdatePlot() {

  double Lower = axisScaleDiv(QwtPlot::xBottom)->lowerBound();
  double Upper = axisScaleDiv(QwtPlot::xBottom)->upperBound();
  double MaxTime = DBL_MIN;
  static QwtSymbol Symbol, Sym1;
  Symbol.setStyle(QwtSymbol::Ellipse);
  Symbol.setSize(4);

  // Select engine for linear or logarithmic scale
  if (!YLogAction->isChecked()) {
    setAxisScaleEngine(QwtPlot::yLeft, new QwtLinearScaleEngine);
  }
  else setAxisScaleEngine(QwtPlot::yLeft, new QwtLog10ScaleEngine);

  for (int ItemNo=0; ItemNo<Items.size(); ItemNo++) {
        // Determine current maximum value for strip chart plotting
        if (Items[ItemNo].Signal->boundingRect().right() > MaxTime) {
          MaxTime = Items[ItemNo].Signal->boundingRect().right();
        }

        // Set symbol if requested
    if (StyleAction->isChecked()) Items[ItemNo].Signal->setSymbol(Symbol);
    else Items[ItemNo].Signal->setSymbol(Sym1);

        // Determine number of data points
    int DataPoints = Items[ItemNo].x.size();    
        if (DataPoints == 0) continue;
 
    // Normalize y scale if requested
    double *y = new double [DataPoints];
    for (int i=0; i<DataPoints; i++) {
      y[i] = Items[ItemNo].y[i];

      if (NormAction->isChecked()) {
            if (Items[ItemNo].Smallest != Items[ItemNo].Largest) {
                  y[i] = (y[i] - Items[ItemNo].Smallest)/(Items[ItemNo].Largest-Items[ItemNo].Smallest);
                }
            else y[i] = 1;
      }  
    }

    // Plot data
    Items[ItemNo].Signal->setData(Items[ItemNo].x.data(), y, DataPoints);
    Items[ItemNo].Signal->show();
        delete[] y;

        // Generate bounding box of all curves for zoomer
        BBox = BBox.unite(Items[ItemNo].Signal->boundingRect());
  }

  // Reset zoom base to include all data
  Zoomer->setZoomBase(BBox);

  // If plot is strip char, only move axis but keep range
  if (StripAction->isChecked()) {
    setCanvasBackground(EddPlotBackgroundColor.lighter(90));
    setAxisScale(QwtPlot::xBottom, Lower+ BBox.right() - MaxTime, Upper + BBox.right() - MaxTime);
  }
  else setCanvasBackground(EddPlotBackgroundColor);

  replot();
}

// Append curve to plot
QwtPlotCurve *EddBasePlot::NewCurve(QwtText Title) {

  struct PlotItem N;

  N.Signal = new QwtPlotCurve;
  N.Signal->attach(this);
  N.Signal->setTitle(Title);
  N.Signal->setPen(QColor(LineColors[Items.size() % (sizeof(LineColors)/sizeof(Qt::GlobalColor))]));
  N.Largest = DBL_MIN;
  N.Smallest = DBL_MAX;  
  Items.append(N);
  
  return N.Signal;
}

// Clear curve data
void EddBasePlot::ClearCurve(unsigned int Item) {

  if (Item >= (unsigned int) Items.size()) return;
  
  Items[Item].x.clear();
  Items[Item].y.clear();
}

// Append data point
void EddBasePlot::AddPoint(unsigned int Item, double x, double y) {

  if (Item >= (unsigned int) Items.size()) return;
  
  Items[Item].x.append(x);
  Items[Item].y.append(y);

  if (y > Items[Item].Largest) Items[Item].Largest = y;
  if (y < Items[Item].Smallest) Items[Item].Smallest = y;    
}

// Rescale plot in case selection has been made outside the canvas
void EddBasePlot::MouseSelection(const QPolygon &P) {
 
  QwtDoubleInterval xPlot, xMouse, yPlot, yMouse; 

  // Shift selected rectangle so that upper left corner is 0/0 on canvas
  QRect R = P.boundingRect().translated(-plotLayout()->canvasRect().topLeft());

  // Current axis intervals
  xPlot = axisScaleDiv(QwtPlot::xBottom)->interval();
  yPlot = axisScaleDiv(QwtPlot::yLeft)->interval();
  
  // Selected axis intervals
  xMouse = QwtDoubleInterval(invTransform(QwtPlot::xBottom, R.left()),
                invTransform(QwtPlot::xBottom, R.right()));
  yMouse = QwtDoubleInterval(invTransform(QwtPlot::yLeft, R.bottom()),
                invTransform(QwtPlot::yLeft, R.top()));

  // Selection region outside all axis?
  if (R.right() < 0 && R.top() > plotLayout()->canvasRect().height()) return;
  
  // Rescale both axis if selected rectangle encompasses canvas completely
  if (P.boundingRect().contains(plotLayout()->canvasRect())) {
        yMouse.setMaxValue(yMouse.maxValue() + yPlot.width());
        yMouse.setMinValue(yMouse.minValue() - yPlot.width());
        xMouse.setMinValue(xMouse.minValue() - xPlot.width());
        xMouse.setMaxValue(xMouse.maxValue() + xPlot.width());

        setAxisScale(QwtPlot::xBottom, xMouse.minValue(), xMouse.maxValue());
        setAxisScale(QwtPlot::yLeft, yMouse.minValue(), yMouse.maxValue());
  }

  // Rescale y axis (increase range if selected rectangle larger than axis area)
  if (R.right() < 0) {
        if (yMouse.maxValue() > axisScaleDiv(QwtPlot::yLeft)->upperBound()) {
          yMouse.setMaxValue(yMouse.maxValue() + yPlot.width());
        }
        if (yMouse.minValue() < axisScaleDiv(QwtPlot::yLeft)->lowerBound()) {
          yMouse.setMinValue(yMouse.minValue() - yPlot.width());
        }
        
        setAxisScale(QwtPlot::yLeft, yMouse.minValue(), yMouse.maxValue());
  }

  // Rescale x axis (increase range if selected rectangle larger than axis area)
  if (R.top() > plotLayout()->canvasRect().height()) {
        if (xMouse.maxValue() > axisScaleDiv(QwtPlot::xBottom)->upperBound()) {
          xMouse.setMaxValue(xMouse.maxValue() + xPlot.width());
        }
        if (xMouse.minValue() < axisScaleDiv(QwtPlot::xBottom)->lowerBound()) {
          xMouse.setMinValue(xMouse.minValue() - xPlot.width());
        }

        setAxisScale(QwtPlot::xBottom, xMouse.minValue(), xMouse.maxValue());
  }

  // Draw new scales
  replot();
} 

// Reset graph axes to autoscale when fully unzoomed
void EddBasePlot::HandleZoom(const QwtDoubleRect &) {

  if(Zoomer->zoomRectIndex() == 0) {
    setAxisAutoScale(QwtPlot::xBottom);
    setAxisAutoScale(QwtPlot::yLeft);
  }
}
    
// Opening context menu
void EddBasePlot::contextMenuEvent(QContextMenuEvent *Event) {

  Menu->exec(Event->globalPos());
}

// Zoom completely out
void EddBasePlot::MenuZoomOut() {

  Zoomer->zoom(0);
  UpdatePlot();
}

// Remove all items except one
void EddBasePlot::MenuSingleTrace() {

  while (Items.size() > 1) {  
        DeleteCurve(Items.last().Signal);
    delete Items.last().Signal;
    Items.takeLast();
  }
  UpdatePlot();
}

// Save data of plot as test 
void EddBasePlot::MenuSaveASCII() {
  QString Filename = QFileDialog::getSaveFileName(this,
     "Filename", ".", "Text files (*.txt *.ascii *.asc);;All files (*)");
  if (Filename.length() <= 0) return;
  
  QFile File(Filename);
  if (!File.open(QFile::WriteOnly | QIODevice::Text | QFile::Truncate)) {
    QMessageBox::warning(this, "Edd Message","Could not open file for writing.",QMessageBox::Ok);
    return;
  }

   // Write x and y data for all signals to file
  QTextStream Stream(&File);

  for (int ItemNo=0; ItemNo<Items.size(); ItemNo++) {
    Stream << QString("# ") + Items[ItemNo].Signal->title().text() + ".hist" << endl;
    for (int i=0; i<Items[ItemNo].Signal->dataSize(); i++) {
      Stream << (int) Items[ItemNo].x.at(i) << " " << Items[ItemNo].Signal->y(i) << endl;
    }
  }
}

// Print plot
void EddBasePlot::MenuPrint() {

  QPrinter *Printer = new QPrinter;
  QPrintDialog *PrintDialog = new QPrintDialog(Printer, this);
  if (PrintDialog->exec() == QDialog::Accepted) {
    QPainter Painter(Printer);
    QPixmap Pixmap = QPixmap::grabWidget(this);
    Painter.drawPixmap(0, 0, Pixmap);
  }
  delete Printer;       delete PrintDialog;
}

// Save plot as image
void EddBasePlot::MenuSave() {

  QString Filename = QFileDialog::getSaveFileName(this,
     "Filename of image", "/home/ogrimm/ddd", "Image files (*.bmp *.jpg *.png *.ppm *.tiff *.xbm *.xpm);;All files (*)");
  if (Filename.length()>0) {
    QPixmap Pixmap = QPixmap::grabWidget(this);
    if(!Pixmap.save(Filename)) {
      QMessageBox::warning(this, "Edd Message","Could not write image file.",QMessageBox::Ok);
      remove(Filename.toAscii().data());
    }
  }
}

// Help text
void EddBasePlot::MenuPlotHelp() {

  QMessageBox::about(this, "Edd - Plot navigation",
    "Zoom\tMouse wheel\n"
        "\tKeys m and shift-m\n"
        "\tSelecting region with left mouse button\n"
        "\tMiddle button zooms out one level\n"
        "\tSelecting a range on an axis\n"
        "\tSelecting whole canvas\n\n"
    "Pan\tShift and left mouse button\n\n"
        "ESC cancels selection\n"
    "Cursor keys move mouse");
}

//////////////////////////////////////
// History text box for DIM service //
//////////////////////////////////////

// Constructor
EddText::EddText(QString Name, bool Pure, QWidget *P):
        QTextEdit(P), Name(Name), Pure(Pure) {
  
  // Widget properties
  setReadOnly(true);
  setAttribute(Qt::WA_DeleteOnClose);
  setAutoFillBackground(true);
  document()->setMaximumBlockCount(1000);
  Accumulate = true;
  
  // Connect to DIM handler
  if (connect(Handler, SIGNAL(YEP(QString, int, QByteArray, QString, QString)), SLOT(Update(QString, int, QByteArray, QString, QString))) == false) {
    printf("Failed connection for %s\n", Name.toAscii().data());
  }

  if (!Pure) {
        // Get history for this service
        const struct EvidenceHistory::Item *R;
        class EvidenceHistory *Hist;

        if ((Hist = Handler->GetHistory(Name)) != NULL) {
          while ((R=Hist->Next()) != NULL) {
                moveCursor (QTextCursor::Start);
                insertPlainText(QString("(")+QDateTime::fromTime_t(R->Time).toString()+") " +
                  QString::fromStdString(EvidenceServer::ToString(Hist->GetFormat(), (void *) R->Data, R->Size)) + "\n"); 
          }     
        }
        Handler->DropHistory(Name);
  }

  // DIM client
  Handler->Subscribe(Name);
}

// Destructor
EddText::~EddText() {

  Handler->Unsubscribe(Name);
}


// Update widget (must happen in GUI thread)
void EddText::Update(QString Name, int Time, QByteArray, QString Format, QString Text) {

  if (this->Name != Name) return;
  QPalette Pal = palette();  

  // Check if service available
  if (!SetStatus(this, Name, Time, Format)) {
    Pal.setColor(QPalette::Base, Qt::lightGray);
        setPalette(Pal);
        return;
  }

  Pal.setColor(QPalette::Base, Qt::white);
  setPalette(Pal);
  QDateTime Timex = QDateTime::fromTime_t(Time); 

  // Clear display in case text should not accumulate
  if (Accumulate == false) clear();

  if (!Pure) {
    moveCursor(QTextCursor::Start);
    insertPlainText(QString("(")+Timex.toString()+QString(") "));         
    insertPlainText(Text + "\n");         
  }
  else  if (Format == "C") insertPlainText(Text);
}


/////////////////////////////
// Interface to Dim system //
/////////////////////////////
EddDim::EddDim() {

  Mutex = new QMutex(QMutex::Recursive);
  Volume = 0;

  // Timer to calculate data rates
  QTimer *Timer = new QTimer(this);
  Timer->connect(Timer, SIGNAL(timeout()), this, SLOT(UpdateStatistics()));
  Timer->start(10000);

  // Connect to DIM handler
  if (connect(this, SIGNAL(INT(QString, int, QByteArray, QString, QString)), SLOT(Update(QString, int, QByteArray, QString, QString))) == false) {
    printf("Failed connection in EddDim()\n");
  }
}

// Destructor
EddDim::~EddDim() {

  QList<QString> L = HistoryList.keys();
  for(int i=0; i<L.size(); i++) delete HistoryList[L[i]].HistClass;

  delete Mutex;
}

// Subscribe to DIM service
void EddDim::Subscribe(QString Name) {

  // Lock before accessing list
  QMutexLocker Locker(Mutex);

  // If already subscribed to service, increase usage count and reemit data for new subscriber
  if (ServiceList.contains(Name)) {
        ServiceList[Name].Count++;
        YEP(Name, ServiceList[Name].TimeStamp, ServiceList[Name].ByteArray, ServiceList[Name].Format, ServiceList[Name].Text);
        return;
  }

  // Create new entry in service list
  ServiceList[Name].ByteArray = QByteArray();
  ServiceList[Name].TimeStamp = -1;
  ServiceList[Name].Count = 1;
  ServiceList[Name].DIMService = new DimStampedInfo(Name.toAscii().data(), INT_MAX, NO_LINK, this);
  return;
}

// Unsubsribe from DIM service
void EddDim::Unsubscribe(QString Name) {

  // Lock before accessing list
  QMutexLocker Locker(Mutex);

  if (ServiceList.contains(Name)) ServiceList[Name].Count--;

  if (ServiceList[Name].Count == 0) {
        delete ServiceList[Name].DIMService;
        ServiceList.remove(Name);
        return;
  }
}

// Get history buffer
class EvidenceHistory *EddDim::GetHistory(QString Name) {

  // History already available (only request again if too old)
  if (HistoryList.contains(Name)) {
        HistoryList[Name].Count++;

        if (time(NULL)-HistoryList[Name].LastUpdate < 5) {
          HistoryList[Name].HistClass->Rewind();
          return HistoryList[Name].HistClass;
        }
        HistoryList[Name].LastUpdate = time(NULL);
        if (HistoryList[Name].HistClass->GetHistory()) return HistoryList[Name].HistClass;
        else return NULL;
  }

  // Create new history class
  HistoryList[Name].HistClass = new EvidenceHistory(Name.toStdString());
  HistoryList[Name].Count = 1;
  HistoryList[Name].LastUpdate = time(NULL);

  if (HistoryList[Name].HistClass->GetHistory()) return HistoryList[Name].HistClass;
  else return NULL;
}

// Reduce history usage counter
void EddDim::DropHistory(QString Name) {

  if (HistoryList.contains(Name)) HistoryList[Name].Count--;
}

// Update throughput statistics and clear up history memory
void EddDim::UpdateStatistics() {

  // Lock before accessing internal variables
  QMutexLocker Locker(Mutex);

  // Remove unused histories after not less than 5 seconds
  QList<QString> L = HistoryList.keys();
  for(int i=0; i<L.size(); i++) {
        if ((HistoryList[L[i]].Count <= 0) && (time(NULL)-HistoryList[L[i]].LastUpdate) > 5) { 
          delete HistoryList[L[i]].HistClass;
          HistoryList.remove(L[i]);
        }
  }
  
  float Rate = Volume/1024.0/10;
  Volume = 0;
  YEP("Edd/Rate_kBSec", time(NULL), QByteArray::number(Rate), "F", QString::number(Rate));
}

// Store service information for usage by Subscribe(), update statistics and emit signal to widgets
void EddDim::Update(QString Name, int Time, QByteArray Data, QString Format, QString Text) {

  // Lock before accessing list
  QMutexLocker Locker(Mutex);

  // Store service data
  if (ServiceList.contains(Name)) {
          ServiceList[Name].TimeStamp = Time;
          ServiceList[Name].ByteArray = Data;
          ServiceList[Name].Format = Format;
          ServiceList[Name].Text = Text;
  }

  // Update statistics only for actual Dim services
  if (!Name.startsWith("Edd/")) Volume += Data.size();
  
  // Emit signal to all widgets
  YEP(Name, Time, Data, Format, Text);
}

// Handling of DIM service update
// No locking allowed. Signal triggers only EddDim::Update() when the main event loop is idle.
void EddDim::infoHandler() {

  if (!EvidenceServer::ServiceOK(getInfo())) INT(getInfo()->getName(), -1);
  else {
        INT(getInfo()->getName(), getInfo()->getTimestamp(), QByteArray((char *) getInfo()->getData(), 
                getInfo()->getSize()), getInfo()->getFormat(), QString::fromStdString(EvidenceServer::ToString(getInfo()->getFormat(), getInfo()->getData(), getInfo()->getSize())));
  }
}

//
//
// ====== FACT specific part ======
//
//

////////////////////////
// Event oscilloscope //
////////////////////////

// Constructor
EventScope::EventScope(QWidget *P): EddBasePlot(P), PixelMap("../../config/PixelMap.txt", false) {

  Name = "drsdaq/EventData";

  Tmpfile = tmpfile();
  if(Tmpfile == NULL) {
    QMessageBox::warning(this, "Edd Message", "Could not open temporary file.", QMessageBox::Ok);
  }

  // Open file with RawDataCTX
  RD = new RawDataCTX(true);
  ErrCode = CTX_NOTOPEN;

  // Context menu
  PhysPipeAction = new QAction("Plot physical pipeline", this);
  PhysPipeAction->setCheckable(true);
  connect(PhysPipeAction, SIGNAL(triggered()), SLOT(PlotTraces()));
  Menu->insertAction(StripAction, PhysPipeAction);
  Menu->removeAction(StripAction);

  // Initial trace
  AddTrace(0,0,0);

  // Connect to DIM handler
  if (connect(Handler, SIGNAL(YEP(QString, int, QByteArray, QString, QString)), SLOT(Update(QString, int, QByteArray, QString, QString))) == false) {
    printf("Failed connection for %s\n", Name.toAscii().data());
  }
  Handler->Subscribe(Name);
}

// Destructor (items with parent widget are automatically deleted)
EventScope::~EventScope() {

  Handler->Unsubscribe(Name);
  while (!List.isEmpty()) DeleteCurve(List.last().Signal);
  delete RD;
  if (Tmpfile != NULL) fclose(Tmpfile);
}  

// Add trace
void EventScope::AddTrace(int Board, int Chip, int Channel) {

  struct ItemDetails N;
  
  N.Signal = NewCurve(QString::number(Board)+","+QString::number(Chip)+","+ QString::number(Channel)+ " (" + DRS_to_Pixel(Board, Chip, Channel).c_str() + ")");
  N.Board = Board;
  N.Chip = Chip;
  N.Channel = Channel;
  N.Trigger = new QwtPlotMarker();
  N.Trigger->setSymbol(QwtSymbol(QwtSymbol::Diamond, QBrush(N.Signal->pen().color()), N.Signal->pen(), QSize(10,10)));
  N.Trigger->attach(this);

  if (List.isEmpty()) {
    QPen Pen = N.Signal->pen();
        Pen.setWidth(2);
        N.Signal->setPen(Pen);
  }
  List.append(N);
    
  PlotTraces();
}

// Update last trace (to reflect current setting of spin boxes in DAQ page)
void EventScope::UpdateFirst(int Board, int Chip, int Channel) {

  if (List.isEmpty()) return;
  
  List.first().Signal->setTitle(QString::number(Board)+","+QString::number(Chip)+","+ QString::number(Channel) + " (" + DRS_to_Pixel(Board, Chip, Channel).c_str() + ")");
  List.first().Board = Board;
  List.first().Chip = Chip;
  List.first().Channel = Channel;
    
  PlotTraces();
}
  
// Update event buffer
void EventScope::Update(QString Name, int Time, QByteArray Data, QString Format, QString) {

  if (Name != this->Name) return;

  // Check if service available
  if (!SetStatus(this, Name, Time, Format)) return;
  if (Data.size() < (int) sizeof(RunHeader)) return;
  
  // Open tempory file and write event data to this file
  QTemporaryFile File;
  if (!File.open()) {
        QMessageBox::warning(this, "Edd Message","Could not open temporary file.",QMessageBox::Ok);
        return;
  }
  if (File.write(Data) == -1) {
        QMessageBox::warning(this, "Edd Message","Could not write data to temporary file.",QMessageBox::Ok);
        return; 
  }

  // Prepare temporary file for run header  
  ftruncate(fileno(Tmpfile), 0);
  rewind(Tmpfile);

  // Open file with RawDataCTX
  switch (ErrCode = RD->OpenDataFile(File.fileName().toAscii().data(), Tmpfile)) {
    case CTX_FOPEN:             QMessageBox::warning(this, "Edd Message","Could not open file.",QMessageBox::Ok);
                                                return;
    case CTX_RHEADER:   QMessageBox::warning(this, "Edd Message","Could not read run header.",QMessageBox::Ok);
                                        return;
    case CTX_BSTRUCT:   QMessageBox::warning(this, "Edd Message","Could not read board structures.",QMessageBox::Ok);
                                                return;
        default: break;
  }

  // Emit signal containing run header
  rewind(Tmpfile);
  QTextStream Stream(Tmpfile);
  emit(RunHeaderChanged(Stream.readAll()));

  // Prepare temporary file for event header  
  ftruncate(fileno(Tmpfile), 0);
  rewind(Tmpfile);

  if (RD->ReadEvent(0, Tmpfile) != CTX_OK) {
    QMessageBox::warning(this, "Edd Warning","Could not read event.",QMessageBox::Ok);
    return;
  }

  // Emit signal containing run header
  rewind(Tmpfile);
  emit(EventHeaderChanged(Stream.readAll()));

  PlotTraces();
}

// Update curves
void EventScope::PlotTraces() {

  double x,y;
  unsigned int Cell, Trig;
  
  // Only process if valid data in RawDataCTX class
  if (ErrCode != CTX_OK) return;
  
  // Set x axis title
  if (PhysPipeAction->isChecked()) setAxisTitle(QwtPlot::xBottom, "Time from start of pipeline (ns)");
  else setAxisTitle(QwtPlot::xBottom, "Time from trigger minus one revolution (ns)");
  
  // Loop through event data to update event scope
  RunHeader *R = RD->RHeader;
  for (int i=0; i<List.size(); i++) {

        ClearCurve(i);

        // Check if current event contains requested trace
    if (List[i].Board>=R->NBoards || List[i].Chip>=R->NChips || List[i].Channel>=R->NChannels) continue;

        // Set trigger marker visibility
        List[i].Trigger->setVisible(PhysPipeAction->isChecked());
        
        // Determine trigger cell
        Trig = *((int *) RD->Data + List[i].Board*R->NChips + List[i].Chip);

        for (unsigned int j=0; j<R->Samples; j++) {

          if (PhysPipeAction->isChecked()) Cell = (j + Trig) % 1024;
          else Cell = j;

          x = j / RD->BStruct[List[i].Board].NomFreq;
          y = *((short *) (RD->Data + R->NBoards*R->NChips*sizeof(int)) +
                List[i].Board*R->NChips*R->NChannels*R->Samples + List[i].Chip*R->NChannels*R->Samples +
                List[i].Channel*R->Samples + Cell) * RD->BStruct[List[i].Board].ScaleFactor;

          AddPoint(i, x, y);
          
          // Set trigger point indicator
          if (Trig == j/*+R->Offset*/) List[i].Trigger->setValue(x, y); 
    }
  }

  UpdatePlot();

  // Loop through event data for pixel display
  QVector<double> Pixel(R->NBoards*R->NChips*R->NChannels);
  int Count = 0;

  for (unsigned int Board=0; Board<R->NBoards; Board++) {
  for (unsigned int Chip=0; Chip<R->NChips; Chip++) {
  for (unsigned int Channel=0; Channel<R->NChannels; Channel++) {
    Pixel[Count] = DBL_MIN;

        for (unsigned int i=0; i<R->Samples; i++) {
          y = *((short *) (RD->Data + R->NBoards*R->NChips*sizeof(int)) +
                Board*R->NChips*R->NChannels*R->Samples + Chip*R->NChannels*R->Samples +
                Channel*R->Samples + i) * RD->BStruct[Board].ScaleFactor;

          if (y > Pixel[Count]) Pixel[Count] = y;
    }
        Count++;          
  }}}
  
  emit(PixelData(Pixel));
}

// Remove list entry
void EventScope::DeleteCurve(QwtPlotCurve *Curve) {

  for (int i=0; i<List.size(); i++) if (List[i].Signal == Curve) {
        delete List[i].Trigger;
    List.removeAt(i);
  }
}

//------------------------------------------------------------------
//**************************** Tab pages ***************************
//------------------------------------------------------------------

//
// Environment page
//
TP_Environment::TP_Environment() {

  QGridLayout *Layout = new QGridLayout(this);
  setAttribute(Qt::WA_DeleteOnClose);

  // Status display
  EddLineDisplay *Line = new EddLineDisplay("ARDUINO/Message");
  Line->setMaximumWidth(200);
  Layout->addWidget(Line, 0, 0, 1, 2);      

  // Generate plot and data displays
  EddPlot *Plot = new EddPlot();
  for (int i=0; i<10; i++) {
    Line = new EddLineDisplay("ARDUINO/Data", i);
    Layout->addWidget(Line, i%5+1, i/5, 1, 1);
    Plot->AddService("ARDUINO/Data", i);
  }
  Layout->addWidget(Plot, 0, 2, 9, 7);      

  // Night sky monitor
  Line = new EddLineDisplay("SQM/Message");
  Line->setMaximumWidth(200);
  Layout->addWidget(Line, 6, 0, 1, 2);      

  Line = new EddLineDisplay("SQM/NSB");
  Layout->addWidget(Line, 7, 0, 1, 1);          
}

//
// Bias page
//
TP_Bias::TP_Bias() {

  QGridLayout *Layout = new QGridLayout(this);
  setAttribute(Qt::WA_DeleteOnClose);
  EddLineDisplay *Line;
  
  EddPlot *Plot = new EddPlot();
  Plot->setMinimumWidth(400);
  for (int i=0; i<18; i++) {
    Line = new EddLineDisplay("Bias/VOLT/ID00", i);
    Layout->addWidget(Line, i%9+1, 0+i/9, 1, 1);
    Plot->AddService("Bias/VOLT/ID00", i);

    Line = new EddLineDisplay("Bias/VOLT/ID00", i+32);
    Layout->addWidget(Line, i%9+1, 2+i/9, 1, 1);
    Plot->AddService("Bias/VOLT/ID00",i+32);
  }

  Layout->addWidget(Plot, 0, 4, 12, 3);
  Line = new EddLineDisplay("Bias/Message");
  Line->setMaximumWidth(200);
  Layout->addWidget(Line, 0, 0, 1, 3);      

  EddCommand *Command = new EddCommand("Bias/Command");
  Layout->addWidget(Command, 10, 0, 1, 4);    

  EddText *Text = new EddText("Bias/ConsoleOut", true);
  Text->setFixedWidth(400);
  Layout->addWidget(Text, 11, 0, 4, 4);
}

//
// Feedback page
//
TP_Feedback::TP_Feedback() {

  setAttribute(Qt::WA_DeleteOnClose);
  QGridLayout *Layout = new QGridLayout(this);
  EddLineDisplay *Line;

  EddPlot *Plot = new EddPlot();
  for (int i=0; i<36; i++) {
    Line = new EddLineDisplay("Feedback/Average", i);
        Line->setMaximumWidth(60);
    Layout->addWidget(Line, i%9+2, 0+i/9, 1, 1);
    Plot->AddService("Feedback/Average", i);
  }
  Layout->addWidget(Plot, 0, 4, 12, 10);

  Line = new EddLineDisplay("drsdaq/Message");
  Line->setMaximumWidth(200);
  Layout->addWidget(Line, 0, 0, 1, 2);      

  Line = new EddLineDisplay("Feedback/State");
  Line->setMaximumWidth(150);
  Layout->addWidget(Line, 1, 0, 1, 2);      
  Line = new EddLineDisplay("Feedback/Count");
  Line->setMaximumWidth(60);
  Layout->addWidget(Line, 1, 2);      

  QWidget *Button = new QPushButton("Details");
  Layout->addWidget(Button, 12, 0, 1, 1);      
  connect(Button, SIGNAL(pressed()), SLOT(FeedbackDetails()));

}

void TP_Feedback::FeedbackDetails() {

  QMainWindow *M = new QMainWindow;
  M->setCentralWidget(new QWidget);
  M->setStatusBar(new QStatusBar(M));
  M->setWindowTitle("Edd - Feedback Details");
  M->setAttribute(Qt::WA_DeleteOnClose);

  QGridLayout *Layout = new QGridLayout(M->centralWidget());
  EddLineDisplay *Line;
  EddPlot *Plot = new EddPlot();

  for (int i=0; i<36; i++) {
    Line = new EddLineDisplay("Feedback/Sigma", i);
        Line->setMaximumWidth(60);
    Layout->addWidget(Line, i%9, 0+i/9, 1, 1);
    Plot->AddService("Feedback/Sigma", i);
        
    Line = new EddLineDisplay("Feedback/Target", i);
        Line->setMaximumWidth(60);
    Layout->addWidget(Line, i%9+10, 0+i/9, 1, 1);
        
        Line = new EddLineDisplay("Feedback/Response", i);
        Line->setMaximumWidth(60);
    Layout->addWidget(Line, i%9+20, 0+i/9, 1, 1);
  }
  Layout->addWidget(Plot, 0, 4, 30, 12);
  
  M->show();
}

//
// Event scope page
//
TP_DAQ::TP_DAQ() {

  EddLineDisplay *Line;

  setAttribute(Qt::WA_DeleteOnClose);
  QGridLayout *Layout = new QGridLayout(this);

  // Run-related information 
  Line = new EddLineDisplay("drsdaq/RunNumber");
  Line->setMaximumWidth(100);
  Layout->addWidget(Line, 0, 1, 1, 1);      
  Line = new EddLineDisplay("drsdaq/EventNumber");
  Line->setMaximumWidth(100);
  Layout->addWidget(Line, 0, 2, 1, 1);      
  Line = new EddLineDisplay("drsdaq/RunSizeMB");
  Line->setMaximumWidth(100);
  Layout->addWidget(Line, 0, 3, 1, 1);      
  Line = new EddLineDisplay("drsdaq/FileSizeMB");
  Line->setMaximumWidth(100);
  Layout->addWidget(Line, 0, 4, 1, 1);      
  Line = new EddLineDisplay("drsdaq/FileName");
  Line->setMaximumWidth(200);
  Layout->addWidget(Line, 0, 5, 1, 1);      

  // Event scope
  Scope = new EventScope;
  Scope->setMinimumWidth(700);

  // Text boxes for run and event header
  RunHeaderDisplay = new QPlainTextEdit();
  EventHeaderDisplay = new QPlainTextEdit();
  RunHeaderDisplay->setReadOnly(true);
  EventHeaderDisplay->setReadOnly(true);

  // Tab widget
  QTabWidget *TabWidget = new QTabWidget();
  TabWidget->addTab(Scope, "&Signals");
  TabWidget->addTab(RunHeaderDisplay, "&Run Header");
  TabWidget->addTab(EventHeaderDisplay, "&Event Header");
  Layout->addWidget(TabWidget, 1, 1, 5, 5);

  connect(Scope, SIGNAL(RunHeaderChanged(QString)), RunHeaderDisplay, SLOT(setPlainText(QString)));
  connect(Scope, SIGNAL(EventHeaderChanged(QString)), EventHeaderDisplay, SLOT(setPlainText(QString)));

  // Channel number 
  Channel = new QSpinBox;
  connect(Channel, SIGNAL(valueChanged(int)), SLOT(UpdateScope(int)));
  Channel->setToolTip("DRS channel number");

  // Chip number 
  Chip = new QSpinBox;
  connect(Chip, SIGNAL(valueChanged(int)), SLOT(UpdateScope(int)));
  Chip->setToolTip("DRS chip number");

  // Board number 
  Board = new QSpinBox;
  connect(Board, SIGNAL(valueChanged(int)), SLOT(UpdateScope(int)));
  Board->setToolTip("DRS board number");

  // Pixel ID
  PixelID = new QLineEdit;
  PixelID->setMaximumWidth(60);
  connect(PixelID, SIGNAL(returnPressed()), SLOT(TranslatePixelID()));
  PixelID->setToolTip("Pixel identification");
  
  // Layout of pixel addressing widgets
  QFormLayout *FormLayout = new QFormLayout();
  FormLayout->setRowWrapPolicy(QFormLayout::WrapAllRows);
  FormLayout->addRow("Channel", Channel);
  FormLayout->addRow("Chip", Chip);
  FormLayout->addRow("Board", Board);
  FormLayout->addRow("Pixel ID", PixelID);
  Layout->addLayout(FormLayout, 0, 0, 2, 1);
  
  // Add trace permanently
  QPushButton *Button = new QPushButton("Keep trace");
  Button->setToolTip("Keep trace in display");
  Button->setMaximumWidth(80);
  Layout->addWidget(Button, 2, 0);
  connect(Button, SIGNAL(clicked()), SLOT(KeepCurrent()));

  // Button to show event display
  QPushButton *PixDisplay = new QPushButton("Pixel display");
  PixDisplay->setFont(QFont("Times", 10, QFont::Bold));
  PixDisplay->setToolTip("Show event display window");
  PixDisplay->setMaximumWidth(80);
  Layout->addWidget(PixDisplay, 4, 0);
  connect(PixDisplay, SIGNAL(clicked()), SLOT(ShowPixelDisplay()));

  // Event display window
  Display = new QWidget();
  Display->setWindowTitle("Edd - Event display");
  
  Pixel = new QPushButton *[MAXPIXEL];
  int Count = 0;
  double x,y;
  
  for (int ix=-22; ix<=22; ix++) for (int iy=-19; iy<=20; iy++) {  
    if (Count == MAXPIXEL) break;
        
        x = ix*0.866;
        y = iy - (ix%2==0 ? 0.5:0);
    if ((pow(x,2)+pow(y,2) >= 395) && !(abs(ix)==22 && iy==7)) continue;
        
    Pixel[Count] = new QPushButton(Display);
        Pixel[Count]->setAutoFillBackground(true);
        Pixel[Count]->setGeometry((int) (x*12.5 + 250), (int) (y*12.5 + 250), 10, 10);
        Pixel[Count]->show();
        Count++;
  }

  connect(Scope, SIGNAL(PixelData(QVector<double>)), SLOT(SetPixelData(QVector<double>)));
}

TP_DAQ::~TP_DAQ() {

  delete[] Pixel;
}

// Translate pixel ID to board, chip, channel
void TP_DAQ::TranslatePixelID() {
  
  if (Scope->Pixel_to_DRSboard(PixelID->text().toStdString()) == 999999999) {
        QMessageBox::warning(this, "Edd Message","Pixel ID unknown.",QMessageBox::Ok);
  }
  else {
    Board->setValue(Scope->Pixel_to_DRSboard(PixelID->text().toStdString()));
    Chip->setValue(Scope->Pixel_to_DRSchip(PixelID->text().toStdString()));
    Channel->setValue(Scope->Pixel_to_DRSchannel(PixelID->text().toStdString()));
  }
}

// Update event scope
void TP_DAQ::KeepCurrent() {

  Scope->AddTrace(Board->value(), Chip->value(), Channel->value());
}

// Update event scope
void TP_DAQ::UpdateScope(int) {

  // Update pixel ID
  PixelID->setText(Scope->DRS_to_Pixel(Board->value(), Chip->value(), Channel->value()).c_str());
  // Update first trace
  Scope->UpdateFirst(Board->value(), Chip->value(), Channel->value());
}

// Show/hide pixel display
void TP_DAQ::ShowPixelDisplay() {

  Display->show();
  Display->raise();
}

void TP_DAQ::SetPixelData(QVector<double> Data) {

  QwtLinearColorMap Map;

  for (int i=0; i<Data.size(); i++) {
        Pixel[i]->setPalette(QPalette(Map.color(QwtDoubleInterval(300, 400), Data[i])));
  }
}


//
// Evidence page
//
TP_Evidence::TP_Evidence() {

  setAttribute(Qt::WA_DeleteOnClose);
  QGridLayout *Layout = new QGridLayout(this);
  EddLineDisplay *Line;
  EddText *Text;
  
  Line = new EddLineDisplay("Alarm/Message");
  Line->setMaximumWidth(200);
  Layout->addWidget(Line, 0, 0, 1, 2);      

  Line = new EddLineDisplay("Alarm/MasterAlarm");
  Layout->addWidget(Line, 0, 1, 1, 1);

  Text = new EddText("Alarm/Summary", true);
  Text->Accumulate = false;
  Text->setMaximumWidth(200);
  Text->setMaximumHeight(150);
  Layout->addWidget(Text, 1, 0, 1, 2);

  Line = new EddLineDisplay("DColl/Message");
  Line->setMaximumWidth(200);
  Layout->addWidget(Line, 3, 0, 1, 2);      

  Line = new EddLineDisplay("DColl/DataSizeMB");
  Layout->addWidget(Line, 4, 0, 1, 1);

  Line = new EddLineDisplay("DColl/LogSizeMB");
  Layout->addWidget(Line, 4, 1, 1, 1);

  Line = new EddLineDisplay("DColl/CurrentFile");
  Line->setMaximumWidth(400);
  Layout->addWidget(Line, 5, 0, 1, 3);

  Line = new EddLineDisplay("Config/Message");
  Line->setMaximumWidth(200);
  Layout->addWidget(Line, 6, 0, 1, 2);      

  Line = new EddLineDisplay("Config/ModifyTime");
  Line->setMaximumWidth(200);
  Line->ShowAsTime = true;
  Layout->addWidget(Line, 7, 0, 1, 1);

  QPushButton *Button = new QPushButton();
  Button->setText("eLogBook");
  connect(Button, SIGNAL(released()), SLOT(StartELog()));
  Layout->addWidget(Button, 6, 1, 1, 1);

  Button = new QPushButton();
  Button->setText("Start DIM browser");
  connect(Button, SIGNAL(released()), SLOT(StartDIMBrowser()));
  Layout->addWidget(Button, 7, 1, 1, 1);

  Line = new EddLineDisplay("Edd/Rate_kBSec");
  Layout->addWidget(Line, 8, 0, 1, 1);
}
 
// Start DIM Browser
void TP_Evidence::StartDIMBrowser() {

  QProcess::startDetached("did", QStringList(), QString(getenv("DIMDIR"))+"/linux/");
}

// Start eLogBook
void TP_Evidence::StartELog() {

  QProcess::startDetached("firefox http://fact.ethz.ch/FACTelog/index.jsp");
}

 
//--------------------------------------------------------------------
//*************************** Main GUI *******************************
//--------------------------------------------------------------------
//
// All widgets have ultimately Central as parent.
//
GUI::GUI() {

  Handler = new EddDim();
  
  // Set features of main window
  Central = new QWidget(this);
  setCentralWidget(Central);
  setStatusBar(new QStatusBar(this));
  setWindowTitle("Edd - Evidence Data Display");

  // Arrangement in tabs
  TabWidget = new QTabWidget(Central);
  TabWidget->setTabsClosable(true);
  connect(TabWidget, SIGNAL(tabCloseRequested(int)), SLOT(DetachTab(int)));
  TabWidget->addTab(new TP_DAQ, "Event scope");
  TabWidget->addTab(new TP_Bias, "Bias");
  TabWidget->addTab(new TP_Feedback, "Feedback");
  TabWidget->addTab(new TP_Environment, "Environment");
  TabWidget->addTab(new TP_Evidence, "Evidence");

  // Menu bar
  QMenu* Menu = menuBar()->addMenu("&Menu");
  Menu->addAction("New history plot", this, SLOT(MenuNewHistory()));
  Menu->addSeparator();
  Menu->addAction("About", this, SLOT(MenuAbout()));
  Menu->addSeparator();
  QAction* QuitAction = Menu->addAction("Quit", qApp, SLOT(quit()));
  QuitAction->setShortcut(Qt::CTRL + Qt::Key_Q);

  // Show main window
  resize(TabWidget->sizeHint()*1.1);
  show();
}  
    
GUI::~GUI() {
  delete Central;
}


void GUI::MenuAbout() {
  QString Rev(SVN_REVISION);
  Rev.remove(0,1).chop(2);
  
  QMessageBox::about(this, "About Edd","Evidence Data Display\n\n"
    "Written by Oliver Grimm, IPP, ETH Zurich\n"
    "This version compiled "__DATE__" ("+Rev+")\n\n"
    "Graphical user interface implemented with Qt and Qwt.\n"
    "Evidence control system based on DIM (http://dim.web.cern.ch).\n\n"
    "Comments to oliver.grimm@phys.ethz.ch.");
}

// Open request for new history plot
void GUI::MenuNewHistory() {

  QStringList List;
  char *Name, *Format;
  int Type;
  bool OK;

  // Find all DIM services and sort
  getServices("*");
  while ((Type = getNextService(Name, Format)) != 0) {
    if (Type==DimSERVICE) List.append(Name);
  }
  List.sort();

  // Open dialog and open history window
  QString Result = QInputDialog::getItem(this, "Edd Request",
    "Enter DIM service name", List, 0, true, &OK);
  if (OK && !Result.isEmpty()) {
    Result = Result.trimmed();
    QWidget *Hist = OpenHistory(Result.toAscii().data(), 0);
    if (Hist != NULL) Hist->show();
  }
}

// Open tab as separate window
void GUI::DetachTab(int Tab) {

  QWidget *W = NULL;
  QMainWindow *M = new QMainWindow;

  M->setCentralWidget(new QWidget(M));
  M->setStatusBar(new QStatusBar(M));

  switch(Tab) {
        case 0: W = new TP_DAQ; break;
        case 1: W = new TP_Bias; break;
        case 2: W = new TP_Feedback; break;
        case 3: W = new TP_Environment; break;
        case 4: W = new TP_Evidence; break;
        default: break;
  }

  if (W == NULL) {
    delete M->centralWidget();
        delete M;
        return;
  }

  W->setParent(M);
  M->resize(size());
  M->setWindowTitle("Edd - " + TabWidget->tabText(Tab));
  M->show();
}

// Quit application when clicking close button on window
void GUI::closeEvent(QCloseEvent *) {
  qApp->quit();
}


//**************************** Main program ***************************
int main(int argc, char *argv[]) {

  QApplication app(argc, argv); 
  GUI MainWindow;

  return app.exec();
}