C++ QwtPlotMarker类代码示例

void Variog_plot::mouseReleaseEvent(QMouseEvent * event)
{
  std::cerr << "show_pairs_count() called " << std::endl;
  if( event->button() != Qt::RightButton ) return;

  const float offset=1.02;
  QFont font;
  font.setPointSize( 7 );

  if( !pairs_shown_ ) {
    for( unsigned int i=0; i < pairs_.size(); i++ ) {
      QString label;
      label.setNum( pairs_[i] );
      QwtText T(label);
      
      QwtPlotMarker * marker = new QwtPlotMarker();
      marker->attach(this);

      T.setFont(font);
      marker->setValue(pairs_coord_x_[i], pairs_coord_y_[i]*offset);
      marker->setLabel(T);
    }
    pairs_shown_ = true;
  }
  else {
    detachItems(QwtPlotItem::Rtti_PlotMarker);
    pairs_shown_ = false;
  }
  replot();
}

/*!
  This function is a shortcut to insert a horizontal or vertical
  line marker, dependent on the specified axis.
  \param label Label
  \param axis Axis to be attached
  \return New key if the marker could be inserted, 0 if not.
*/
long QwtPlot::insertLineMarker(const QString &label, int axis)
{
    QwtMarker::LineStyle lineStyle = QwtMarker::NoLine;
    int xAxis = QwtPlot::xBottom;
    int yAxis = QwtPlot::yLeft;

    switch(axis)
    {
        case yLeft:
        case yRight:
            yAxis = axis;
            lineStyle = QwtMarker::HLine;
            break;
        case xTop:
        case xBottom:
            xAxis = axis;
            lineStyle = QwtMarker::VLine;
            break;
    }

    QwtPlotMarker *marker = new QwtPlotMarker(this);
    if ( marker == 0 )
        return 0;

    marker->setAxis(xAxis, yAxis);
    marker->setLabel(label);
    marker->setLineStyle(lineStyle);
    marker->setLabelAlignment(Qt::AlignRight|Qt::AlignTop);

    long key = insertMarker(marker);
    if ( key == 0 )
        delete marker;

    return key;
}

// Select the point at a position.
void XtalOptPlot::select(const QPoint& pos)
{
  QwtPlotMarker* selection = nullptr;

  // Must be within 10 pixels at least
  double dist = 10.0;

  const QwtPlotItemList& itmList = itemList();
  for (QwtPlotItemIterator it = itmList.begin(); it != itmList.end(); ++it) {
    if ((*it)->rtti() == QwtPlotItem::Rtti_PlotMarker) {
      QwtPlotMarker* m = static_cast<QwtPlotMarker*>(*it);
      // We have to map the plot coordinates onto widget coordinates before
      // comparing
      const QwtScaleMap& xMap = canvasMap(m->xAxis());
      const QwtScaleMap& yMap = canvasMap(m->yAxis());
      double mx = xMap.transform(m->xValue());
      double my = yMap.transform(m->yValue());
      double d = distance(QPointF(mx, my), pos);
      if (d < dist) {
        selection = m;
        dist = d;
      }
    }
  }

  selectMarker(selection);
}

SimDialog::SimDialog( QWidget * parent, Qt::WFlags f) 
	: QDialog(parent, f)
{
  setupUi(this);

  // setup the plot ...
  m_plot->setTitle("Comparing Similarity Measures");
  m_plot->insertLegend(new QwtLegend(), QwtPlot::BottomLegend);

  // set up the axes ...
  m_plot->setAxisTitle(QwtPlot::xBottom, "Variations");
  m_plot->setAxisScale(QwtPlot::xBottom, -10, 10);

  m_plot->setAxisTitle(QwtPlot::yLeft, "Similarity");
  m_plot->setAxisScale(QwtPlot::yLeft, -1.5, 1.5);

  // enable grid ...
  QwtPlotGrid *grid = new QwtPlotGrid;
  grid->enableXMin(true);
  grid->enableYMin(true);
  grid->setMajPen(QPen(Qt::black, 0, Qt::DotLine));
  grid->setMinPen(QPen(Qt::gray, 0 , Qt::DotLine));
  grid->attach(m_plot);

  //  Insert zero line at y = 0
  QwtPlotMarker *mY = new QwtPlotMarker();
  mY->setLabelAlignment(Qt::AlignRight|Qt::AlignTop);
  mY->setLineStyle(QwtPlotMarker::HLine);
  mY->setYValue(0.0);
  mY->attach(m_plot);

  //  Insert zero line at x = 0
  QwtPlotMarker *mX = new QwtPlotMarker();
  mX->setLabelAlignment(Qt::AlignRight|Qt::AlignTop);
  mX->setLineStyle(QwtPlotMarker::VLine);
  mX->setXValue(0.0);
  mX->attach(m_plot);

  // Insert new curves
  cReg = new QwtPlotCurve("Regular Similarity Measure");
  cReg->attach(m_plot);

  cOct = new QwtPlotCurve("Octree based Similarity Measure");
  cOct->attach(m_plot);

  // Set curve styles
  cReg->setPen(QPen(Qt::red, 2));
  cOct->setPen(QPen(Qt::blue, 2));

  // Populate the volume combos ...
  MainWindow* _win  = (MainWindow *)this->parent();
  viewer3d *  _view = (viewer3d *) _win->getViewer();
  QList<Volume*> _vols = _view->getVolumes();

  // append Volume names to combo boxes ...
  // Need to modify Volume class so that it stored patient name ...
  // More importantly modify PatientBrowser so that the data can be directly
  // loaded.
}

DataPlot::DataPlot(QWidget *parent, TelemetryStateReceiver* collector, OdometryStateReceiver* odometryReceiver,QMap<QString, QStringList> *list) :
    QwtPlot(parent),
    d_interval(0),
    d_timerId(-1)
{
    node=collector;
    odom_receiver=odometryReceiver;
    connect_status=false;
    QObject::connect( node, SIGNAL( parameterReceived( )), this, SLOT( onParameterReceived( )));

    data_count=0;
    posicionBuffer=PLOT_SIZE;
    colors_list <<"red"<<"blue"<<"green"<<"black"<<"yellow"<<"magenta"<<"cyan"<<"gray"<<"darkCyan"<<"darkMagenta"<<"darkYellow"<<"darkGray"<<"darkRed"<<"darkBlue"<<"darkGreen"<<"lightGray" <<"red"<<"blue"<<"green"<<"black"<<"yellow"<<"magenta"<<"cyan"<<"gray"<<"darkCyan"<<"darkMagenta"<<"darkYellow"<<"darkGray"<<"darkRed"<<"darkBlue"<<"darkGreen"<<"lightGray" <<"red"<<"blue"<<"green"<<"black"<<"yellow"<<"magenta"<<"cyan"<<"gray"<<"darkCyan"<<"darkMagenta"<<"darkYellow"<<"darkGray"<<"darkRed"<<"darkBlue"<<"darkGreen"<<"lightGray" <<"red"<<"blue"<<"green"<<"black"<<"yellow"<<"magenta"<<"cyan"<<"gray"<<"darkCyan"<<"darkMagenta"<<"darkYellow"<<"darkGray"<<"darkRed"<<"darkBlue"<<"darkGreen"<<"lightGray";

    iterator_colors=0;
    is_stop_pressed=false;
    alignScales();
    setAutoReplot(false);

    parameters_list = setCurveLabels(*list);
    current_min_limit=0;
    current_max_limit=0;


    QwtPlotZoomer* zoomer = new MyZoomer(canvas());


    QwtPlotPanner *panner = new QwtPlotPanner(canvas());
    panner->setAxisEnabled(QwtPlot::yRight, true);
    panner->setMouseButton(Qt::MidButton);

    // Avoid jumping when labels with more/less digits
    // appear/disappear when scrolling vertically
    const QFontMetrics fm(axisWidget(QwtPlot::yLeft)->font());
    QwtScaleDraw *sd = axisScaleDraw(QwtPlot::yLeft);
    sd->setMinimumExtent( fm.width("100.00") );

    const QColor c(Qt::darkBlue);
    zoomer->setRubberBandPen(c);
    zoomer->setTrackerPen(c);

    setGridPlot();
    initTimeData();

#if 0
    //  Insert zero line at y = 0
    QwtPlotMarker *mY = new QwtPlotMarker();
    mY->setLabelAlignment(Qt::AlignRight|Qt::AlignTop);
    mY->setLineStyle(QwtPlotMarker::HLine);
    mY->setYValue(0.0);
    mY->attach(this);
#endif

    initAxisX();
    initAxisY();
    initCurves();

    setTimerInterval(1000);// 1 second = 1000
}

/*!
  \return a marker's symbol
  \param key Marker key
*/
QwtSymbol QwtPlot::markerSymbol(long key) const
{
    QwtPlotMarker *m = d_markers->find(key);
    if (m)
        return m->symbol();
    else
        return QwtSymbol();
}

/*!
  \return a marker's line style
  \param key Marker key
*/
QwtMarker::LineStyle QwtPlot::markerLineStyle(long key) const
{
    QwtPlotMarker *m = d_markers->find(key);
    if (m)
        return m->lineStyle();
    else
        return QwtMarker::NoLine;
}

/*!
  \return a marker's label
  \param key Marker key
*/
const QString QwtPlot::markerLabel(long key) const
{
    QwtPlotMarker *m = d_markers->find(key);
    if (m)
        return m->label();
    else
        return QString::null;
}

/*!
  \return a marker's label alignment
  \param key Marker key
*/
int QwtPlot::markerLabelAlign(long key) const
{
    QwtPlotMarker *m = d_markers->find(key);
    if (m)
        return m->labelAlignment();
    else
        return 0;
}

/*!
  \return the font of a marker
*/
QFont QwtPlot::markerFont(long key) const
{
    QwtPlotMarker *m = d_markers->find(key);
    if (m)
        return m->font();
    else
        return QFont();
}

void Plot::removeMarker(int index)
{
	QwtPlotMarker *m = d_markers[index];
	if(!m)
		return;
	m->detach();
	d_markers.remove (index);
}

void Plot_AddHLine(QwtPlot* plot, double value , double r , double g, double b)
{
    QwtPlotMarker *marker = new QwtPlotMarker();
    marker->setLineStyle ( QwtPlotMarker::HLine );
    marker->setLinePen(QPen(QColor(r, g, b, 128), 1, Qt::DashDotLine));
    marker->attach( plot );
    marker->setYValue( value );
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
QwtPlotMarker* RicGridStatisticsDialog::createVerticalPlotMarker(const QColor& color, double xValue)
{
    QwtPlotMarker* marker = new QwtPlotMarker();
    marker->setXValue(xValue);
    marker->setLineStyle(QwtPlotMarker::VLine);
    marker->setLinePen(color, 2, Qt::SolidLine);
    return marker;
}

/*!
  \return a marker's line pen
  \param key Marker key
*/
QPen QwtPlot::markerLinePen(long key) const 
{
    QwtPlotMarker *m = d_markers->find(key);
    if (m)
        return m->linePen();
    else
        return QPen();
    
}

/*!
  \return the y axis to which a marker is attached
  \param key Marker key
*/
int QwtPlot::markerYAxis(long key) const
{
    QwtPlotMarker *m = d_markers->find(key);
    if (m)
        return m->yAxis();
    else
        return -1;
    
}