source: flair-src/trunk/tools/FlairGCS/src/UsSensorPlot.cpp@ 443

// %flair:license{
// This file is part of the Flair framework distributed under the
// CECILL-C License, Version 1.0.
// %flair:license}
#include "UsSensorPlot.h"
#include "Layout.h"
#include <qwt_plot.h>
#include <qwt_plot_curve.h>
#include <qwt_plot_grid.h>
#include <qwt_plot_magnifier.h>
#include <qwt_plot_canvas.h>
#include <qwt_scale_widget.h>
#include <qwt_legend_label.h>
#include <qwt_legend.h>
#include <qwt_plot_panner.h>
#include <qwt_plot_marker.h>
#include <QMouseEvent>
#include <QMenu>
#include <QInputDialog>
#include <QVBoxLayout>
#include <QScrollBar>
#include <qendian.h>
#include <qwt_symbol.h>

UsSensorPlot::UsSensorPlot(Layout *parent, int row, int col, QString plot_name,
                       QString y_name, float ymin, float ymax, uint32_t nbSamples,QString datasType,bool enabled, uint16_t period)
    : DataRemote(plot_name, "UsSensorPlot", parent, enabled, period) {
  visible_widget = new QWidget();

  parent->addWidget(visible_widget, row, col);
  QVBoxLayout* layout = new QVBoxLayout(visible_widget);
      
  plot = new QwtPlot(NULL);
  plot->setEnabled(enabled);
  
  this->nbSamples=nbSamples;
  this->datasType=datasType;

#if QT_VERSION >= 0x040000
#ifdef Q_WS_X11
  /*
     Qt::WA_PaintOnScreen is only supported for X11, but leads
     to substantial bugs with Qt 4.2.x/Windows
   */
  plot->canvas()->setAttribute(Qt::WA_PaintOnScreen, true);
#endif
#endif

  //scroll bar
  scrollbar=new QScrollBar(Qt::Horizontal);
  scrollbar->setSingleStep(1);
  scrollbar->setRange(0,0);
  scrolling=true;
  connect(scrollbar,SIGNAL(valueChanged(int)),this,SLOT(scrollBarMoved(int)));
  layout->addWidget(scrollbar);
  layout->addWidget(plot);

  alignScales();

  // Assign a title
  plot->setTitle(plot_name);
  
  // Axis
  plot->setAxisTitle(QwtPlot::xBottom, "samples");
  setXAxisScale(0, nbSamples-1);
  
  plot->setAxisTitle(QwtPlot::yLeft, y_name);
  setYAxisScale(ymin, ymax);

  // grid
  QwtPlotGrid *grid = new QwtPlotGrid;
  grid->setPen(QPen(Qt::black, 0, Qt::DotLine));
  grid->attach(plot);

  // zoomer
  QwtPlotMagnifier *zoomer = new QwtPlotMagnifier(plot->canvas());
  zoomer->setMouseButton(Qt::RightButton, Qt::ControlModifier);

  // scroller
  QwtPlotPanner *scroller = new QwtPlotPanner(plot->canvas());

  plot->canvas()->installEventFilter(this);
  
  dx = (double *)malloc(nbSamples* sizeof(double));
  for (int i = 0; i < nbSamples; i++) dx[i] = i;
  
  // Insert new curve
  datas = new QwtPlotCurve();
  datas->attach(plot);
  datas->setPen(QPen(QColor(255, 0, 0, 255)));

  datas->setVisible(true);

  if (datasType == "float") {
    receivesize += sizeof(float);
  } else if (datasType == "int8_t" || datasType == "uint8_t") {
    receivesize += sizeof(int8_t);
  } else if (datasType == "int16_t" || datasType == "uint16_t") {
    receivesize += sizeof(int16_t);
  } else {
    fprintf(stderr,"UsSensorPlot::unknown type %s\n",
           datasType.toLocal8Bit().constData());
  }
  
  firstPeakStart = new QwtPlotMarker();
  QwtSymbol* s1=new QwtSymbol( QwtSymbol::Diamond, Qt::blue, Qt::NoPen, QSize( 10, 10 ) );
  firstPeakStart->setSymbol(s1);
  firstPeakStart->attach( plot );
  
  firstPeakEnd = new QwtPlotMarker();
  QwtSymbol* s2=new QwtSymbol( QwtSymbol::Diamond, Qt::blue, Qt::NoPen, QSize( 10, 10 ) );
  firstPeakEnd->setSymbol(s2);
  firstPeakEnd->attach( plot );
  
  secondPeakStart = new QwtPlotMarker();
  QwtSymbol* s3=new QwtSymbol( QwtSymbol::Diamond, Qt::black, Qt::NoPen, QSize( 10, 10 ) );
  secondPeakStart->setSymbol(s3);
  secondPeakStart->attach( plot );
  
  secondPeakEnd = new QwtPlotMarker();
  QwtSymbol* s4=new QwtSymbol( QwtSymbol::Diamond, Qt::black, Qt::NoPen, QSize( 10, 10 ) );
  secondPeakEnd->setSymbol(s4);
  secondPeakEnd->attach( plot );
}

UsSensorPlot::~UsSensorPlot() {
  free(dx);
  for(int i=0;i<measures.count();i++) {
    free(measures.at(i).dy);
  }
}

void UsSensorPlot::XmlEvent(QDomElement *dom) {
  XmlSetup(dom);
}

bool UsSensorPlot::eventFilter(QObject *o, QEvent *e) {
  if (o == plot->canvas()) {
    switch (e->type()) {
    case QEvent::MouseButtonPress: {
      mousePressEvent((QMouseEvent *)e);
      break;
    }

    default:
      break;
    }
  }
  return plot->eventFilter(o, e);
}

void UsSensorPlot::setXAxisScale(float xmin, float xmax) {
  xmin_orig = xmin;
  xmax_orig = xmax;
  plot->setAxisScale(QwtPlot::xBottom, xmin_orig, xmax_orig);
}

void UsSensorPlot::setYAxisScale(float ymin, float ymax) {
  ymin_orig = ymin;
  ymax_orig = ymax;
  plot->setAxisScale(QwtPlot::yLeft, ymin_orig, ymax_orig);
}

//
//  Set a plain canvas frame and align the scales to it
//
void UsSensorPlot::alignScales(void) {
  // The code below shows how to align the scales to
  // the canvas frame, but is also a good example demonstrating
  // why the spreaded API needs polishing.
  /*
      plot->canvas()->setFrameStyle(QFrame::Box | QFrame::Plain );
      plot->canvas()->setLineWidth(1);
  */
  for (int i = 0; i < QwtPlot::axisCnt; i++) {
    QwtScaleWidget *scaleWidget = (QwtScaleWidget *)plot->axisWidget(i);
    if (scaleWidget)
      scaleWidget->setMargin(0);

    QwtScaleDraw *scaleDraw = (QwtScaleDraw *)plot->axisScaleDraw(i);
    if (scaleDraw)
      scaleDraw->enableComponent(QwtAbstractScaleDraw::Backbone, false);
  }
}

void UsSensorPlot::BufEvent(char **buf, int *buf_size, uint16_t period,uint16_t nb_buffering,bool big_endian) {
  plot->setEnabled(IsEnabled());
  if (IsEnabled() == false || RefreshRate_ms() != period)
    return;
   
  measure_t measure;
  measure.dy = (double *)malloc(nbSamples* sizeof(double));

  if (datasType == "float") {
    float *data=(float*)*buf;
    for (int i = 0; i < nbSamples; i++) {
      measure.dy[i]=data[i];
    }
    *buf += nbSamples*sizeof(float);
  } else if (datasType == "int8_t") {
    int8_t *data=(int8_t*)*buf;
    for (int i = 0; i < nbSamples; i++) {
      measure.dy[i]=data[i];
    }
    *buf += nbSamples*sizeof(int8_t);
   } else if (datasType == "uint8_t") {
    uint8_t *data=(uint8_t*)*buf;
    for (int i = 0; i < nbSamples; i++) {
      measure.dy[i]=data[i];
    }
    *buf += nbSamples*sizeof(uint8_t);
  } else if (datasType == "int16_t") {
    int16_t *data=(int16_t*)*buf;
    for (int i = 0; i < nbSamples; i++) {
      measure.dy[i]=data[i];
    }
    *buf += nbSamples*sizeof(int16_t);
  } else if (datasType == "uint16_t") {
    uint16_t *data=(uint16_t*)*buf;
    for (int i = 0; i < nbSamples; i++) {
      measure.dy[i]=data[i];
    }
    *buf += nbSamples*sizeof(uint16_t);
  } else {
    fprintf(stderr,"UsSensorPlot::DrawDatas type non connu %s\n",datasType.toLocal8Bit().constData());
  }
  uint16_t *data=(uint16_t*)*buf;
  *buf += 4*sizeof(uint16_t);
  
  measure.firstPeakStartIndex=data[0];
  measure.firstPeakEndIndex=data[1];
  measure.secondPeakStartIndex=data[2];
  measure.secondPeakEndIndex=data[3];
  measures.append(measure);

  scrollbar->setRange(0,measures.count()-1);
  if(scrolling) {
    scrollbar->blockSignals(true);//block valuechanged signal 
    scrollbar->setValue(measures.count()-1);
    scrollbar->blockSignals(false);
    
    plotMeasure(measures.count()-1);
  }
}

void UsSensorPlot::plotMeasure(int index) {
  firstPeakStart->setValue( QPointF(measures.at(index).firstPeakStartIndex,measures.at(index).dy[measures.at(index).firstPeakStartIndex] ) );
  firstPeakEnd->setValue( QPointF(measures.at(index).firstPeakEndIndex,measures.at(index).dy[measures.at(index).firstPeakEndIndex] ) );
  secondPeakStart->setValue( QPointF(measures.at(index).secondPeakStartIndex,measures.at(index).dy[measures.at(index).secondPeakStartIndex] ) );
  secondPeakEnd->setValue( QPointF(measures.at(index).secondPeakEndIndex,measures.at(index).dy[measures.at(index).secondPeakEndIndex] ) );
  
  // Attach (don't copy) data
  datas->setRawSamples(dx,measures.at(index).dy, nbSamples);
  
  plot->replot();
}
// context menu
void UsSensorPlot::mousePressEvent(QMouseEvent *event) {
  if (event->button() == Qt::RightButton) {

    QMenu *menu = new QMenu("nom", plot);
    // ajout des actions
    QAction *a, *z;

    a = menu->addAction("reset zoom");
    menu->addSeparator();

    appendmenu(menu);
    z = execmenu(plot, menu, event->globalPos());
    delete menu;

    if (z == a) {
      // zoom to original size
      plot->setAxisScale(QwtPlot::yLeft, ymin_orig, ymax_orig);
      plot->setAxisScale(QwtPlot::xBottom, xmin_orig, xmax_orig);
    }
  }
}

void UsSensorPlot::scrollBarMoved(int value) {
  if(value==scrollbar->maximum()) {
    scrolling=true;
  } else {
    scrolling=false;
  }
  plotMeasure(value);
}