C++ QwtPlotMarker::setValue方法代码示例

void Grid::enableZeroLineY(bool enable) {
  Plot *d_plot = dynamic_cast<Plot *>(plot());
  if (!d_plot)
    return;

  if (mrkY < 0 && enable) {
    QwtPlotMarker *m = new QwtPlotMarker();
    mrkY = d_plot->insertMarker(m);
    m->setRenderHint(QwtPlotItem::RenderAntialiased, false);
    m->setAxis(xAxis(), yAxis());
    m->setLineStyle(QwtPlotMarker::HLine);
    m->setValue(0.0, 0.0);

    double width = 1;
    if (d_plot->canvas()->lineWidth())
      width = d_plot->canvas()->lineWidth();
    else if (d_plot->axisEnabled(QwtPlot::xBottom) ||
             d_plot->axisEnabled(QwtPlot::xTop))
      width = d_plot->axesLinewidth();

    m->setLinePen(QPen(Qt::black, width, Qt::SolidLine));
  } else if (mrkY >= 0 && !enable) {
    d_plot->removeMarker(mrkY);
    mrkY = -1;
  }
}

void Grid::enableZeroLineX(bool enable)
{
    Plot *d_plot = (Plot *)plot();
    if (!d_plot)
        return;

    if (mrkX<0 && enable) {
        QwtPlotMarker *m = new QwtPlotMarker();
        mrkX = d_plot->insertMarker(m);
        m->setRenderHint(QwtPlotItem::RenderAntialiased, false);
        m->setAxis(xAxis(), yAxis());
        m->setLineStyle(QwtPlotMarker::VLine);
        m->setValue(0.0, 0.0);

        double width = 1;
        if (d_plot->canvas()->lineWidth())
            width = d_plot->canvas()->lineWidth();
        else if (d_plot->axisEnabled (QwtPlot::yLeft) || d_plot->axisEnabled (QwtPlot::yRight))
            width =  d_plot->axesLinewidth();

        m->setLinePen(QPen(Qt::black, width, Qt::SolidLine));
    } else if (mrkX >= 0 && !enable) {
        d_plot->removeMarker(mrkX);
        mrkX=-1;
    }
}

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();
}

void SweepInspector::loadSweep(int index) {
  //load in new sweep values from data
  if (data == NULL) return;
  if ( (index < 0)  || (index >= data->getNumSweeps())) return;

  //remove old data and get new
  if (d_curve) d_curve->attach(NULL);
  detachItems();
  fsweep sweep = data->getSweep(index);

  d_curve = new QwtPlotCurve( data->timestampFromIndex(index) ); //Qwt will delete() this when its done with it
  d_curve->setRenderHint( QwtPlotItem::RenderAntialiased );
  d_curve->setStyle( QwtPlotCurve::Lines );
  d_curve->setPen( QColor( Qt::yellow ), 2, Qt::SolidLine );
  d_curve->setSamples( sweep );
  d_curve->attach(this);

  QwtInterval frange = data->limits(FREQ);
  //setAxisScale(QwtPlot::xBottom, frange.minValue(), frange.maxValue(), (frange.maxValue() - frange.minValue())/ 5.0);
  //setAxisScale(QwtPlot::yLeft, -135, 20, 10.0);
  setTitle( QString("RF Sweep @ %1").arg(data->timestampFromIndex(index)) );
  //set maximum zoom out
  zoomer->setZoomBase(QRectF(QPointF(frange.minValue(), 40), QPointF(frange.maxValue(), -135)));
  zoomer->zoomBase();

  //find max, min, and average values and drop it on plot as well
  double max = sweep.first().y(), min = sweep.first().y(), avg=0;
  for(int i=0; i < sweep.size(); i++) {
    max = std::max(max, sweep.at(i).y());
    min = std::min(min, sweep.at(i).y());
    avg += sweep.at(i).y();
  } avg /= sweep.size();

  //add markers onto the plot
  QwtPlotMarker *one = new QwtPlotMarker(), *two = new QwtPlotMarker();
  one->attach(this); one->setAxes(QwtPlot::xTop, QwtPlot::yRight);
  two->attach(this); two->setAxes(QwtPlot::xTop, QwtPlot::yRight);

  QwtText tone = QwtText(QString("Max: %1 dBm\nMin: %2 dBm\nAvg: %3 dBm").arg(max).arg(min).arg(avg));
  tone.setFont( QFont( "Helvetica", 10, QFont::Bold ) );
  tone.setColor( Qt::green );
  tone.setRenderFlags(Qt::AlignTop | Qt::AlignLeft);

  one->setLabel(tone);
  one->setValue(0, 10);
  one->setLabelAlignment(Qt::AlignBottom | Qt::AlignRight);

  QwtText ttwo(data->plotText());
  ttwo.setFont( QFont( "Helvetica", 10, QFont::Bold ) );
  ttwo.setColor( Qt::white );
  ttwo.setRenderFlags(Qt::AlignBottom | Qt::AlignRight);

  two->setLabel(ttwo);
  two->setValue(10, 10);
  two->setLabelAlignment(Qt::AlignBottom | Qt::AlignLeft);

  replot();
  repaint();
}

/**
 * Dodaje dodatkowy opis wykresu.
 *
 * @param caption opis wykresu
 * @param x pozycja na wykresie w skali czasu
 * @param y pozycja na wykresie w skali pionowej (np. częstotliwości)
 */
void SpectrogramPlot::setExtraCaption(QString caption, double x, double y)
{
    QwtPlotMarker* marker = new QwtPlotMarker();
    QwtText label(caption);
    label.setColor(QColor::fromRgba(0x88FFFFFF));
    label.setFont(QFont("Arial", 10, QFont::Bold));
    marker->setLabel(label);
    marker->setLineStyle(QwtPlotMarker::NoLine);
    marker->setValue(x, y);
    marker->setLabelAlignment(Qt::AlignRight | Qt::AlignBottom);
    marker->attach(this);
}

void QgsCurveEditorWidget::addPlotMarker( double x, double y, bool isSelected )
{
  QColor borderColor( 0, 0, 0 );

  QColor brushColor = isSelected ? borderColor : QColor( 255, 255, 255, 0 );

  QwtPlotMarker *marker = new QwtPlotMarker();
  marker->setSymbol( new QwtSymbol( QwtSymbol::Ellipse,  QBrush( brushColor ), QPen( borderColor, isSelected ? 2 : 1 ), QSize( 8, 8 ) ) );
  marker->setValue( x, y );
  marker->attach( mPlot );
  marker->setRenderHint( QwtPlotItem::RenderAntialiased, true );
  mMarkers << marker;
}

void QgsGradientColorRampDialog::addPlotMarker( double x, double y, const QColor &color, bool isSelected )
{
  QColor borderColor = color.darker( 200 );
  borderColor.setAlpha( 255 );

  QColor brushColor = color;
  brushColor.setAlpha( 255 );

  QwtPlotMarker *marker = new QwtPlotMarker();
  marker->setSymbol( new QwtSymbol( QwtSymbol::Ellipse,  QBrush( brushColor ), QPen( borderColor, isSelected ? 2 : 1 ), QSize( 8, 8 ) ) );
  marker->setValue( x, y );
  marker->attach( mPlot );
  marker->setRenderHint( QwtPlotItem::RenderAntialiased, true );
  mMarkers << marker;
}

void Graph::addMarker(double val, const QColor &color, int axis)
{
    QwtPlotMarker *m = new QwtPlotMarker();
    m->setLineStyle(axis == QwtPlot::xBottom ? QwtPlotMarker::VLine : QwtPlotMarker::HLine);
    m->setLinePen(QPen(color));
    m->setYAxis(axis);
    m->setValue(val, val);
    m->attach(this);
    m->setLabel(QString::number(val));

    if(axis == QwtPlot::xBottom)
        m->setLabelAlignment(Qt::AlignLeft | Qt::AlignVCenter);
    else
        m->setLabelAlignment(Qt::AlignTop | Qt::AlignHCenter);

    getMarkers(axis).push_back(m);
}

void QgsVectorGradientColorRampV2Dialog::addPlotMarker( double x, double y, const QColor& color, bool isSelected )
{
  QColor borderColor = color.darker( 200 );
  borderColor.setAlpha( 255 );

  QColor brushColor = color;
  brushColor.setAlpha( 255 );

  QwtPlotMarker *marker = new QwtPlotMarker();
#if defined(QWT_VERSION) && QWT_VERSION>=0x060000
  marker->setSymbol( new QwtSymbol( QwtSymbol::Ellipse,  QBrush( brushColor ), QPen( borderColor, isSelected ? 2 : 1 ), QSize( 10, 10 ) ) );
#else
  marker->setSymbol( QwtSymbol( QwtSymbol::Ellipse,  QBrush( brushColor ), QPen( borderColor, isSelected ? 2 : 1 ), QSize( 10, 10 ) ) );
#endif
  marker->setValue( x, y );
  marker->attach( mPlot );
  marker->setRenderHint( QwtPlotItem::RenderAntialiased, true );
  mMarkers << marker;
}

void Plot::populate()
{
    GridItem *gridItem = new GridItem();
#if 0
    gridItem->setOrientations( Qt::Horizontal );
#endif
    gridItem->attach( this );

    const Qt::GlobalColor colors[] =
    {
        Qt::red,
        Qt::blue,
        Qt::darkCyan,
        Qt::darkMagenta,
        Qt::darkYellow
    };

    const int numColors = sizeof( colors ) / sizeof( colors[0] );

    for ( int i = 0; i < QuoteFactory::NumStocks; i++ )
    {
        QuoteFactory::Stock stock = static_cast<QuoteFactory::Stock>( i );

        QwtPlotTradingCurve *curve = new QwtPlotTradingCurve();
        curve->setTitle( QuoteFactory::title( stock ) );
        curve->setOrientation( Qt::Vertical );
        curve->setSamples( QuoteFactory::samples2010( stock ) );

        // as we have one sample per day a symbol width of
        // 12h avoids overlapping symbols. We also bound
        // the width, so that is is not scaled below 3 and
        // above 15 pixels.

        curve->setSymbolExtent( 12 * 3600 * 1000.0 );
        curve->setMinSymbolWidth( 3 );
        curve->setMaxSymbolWidth( 15 );

        const Qt::GlobalColor color = colors[ i % numColors ];

        curve->setSymbolPen( color );
        curve->setSymbolBrush( QwtPlotTradingCurve::Decreasing, color );
        curve->setSymbolBrush( QwtPlotTradingCurve::Increasing, Qt::white );
        curve->attach( this );

        showItem( curve, true );
    }

    for ( int i = 0; i < 2; i++ )
    {
        QwtPlotMarker *marker = new QwtPlotMarker();

        marker->setTitle( QString( "Event %1" ).arg( i + 1 ) );
        marker->setLineStyle( QwtPlotMarker::VLine );
        marker->setLinePen( colors[ i % numColors ], 0, Qt::DashLine );
        marker->setVisible( false );

        QDateTime dt( QDate( 2010, 1, 1 ) );
        dt = dt.addDays( 77 * ( i + 1 ) );
        
        marker->setValue( QwtDate::toDouble( dt ), 0.0 );

        marker->setItemAttribute( QwtPlotItem::Legend, true );

        marker->attach( this );
    }

    // to show how QwtPlotZoneItem works

    ZoneItem *zone1 = new ZoneItem( "Zone 1");
    zone1->setColor( Qt::darkBlue );
    zone1->setInterval( QDate( 2010, 3, 10 ), QDate( 2010, 3, 27 ) );
    zone1->setVisible( false );
    zone1->attach( this );

    ZoneItem *zone2 = new ZoneItem( "Zone 2");
    zone2->setColor( Qt::darkMagenta );
    zone2->setInterval( QDate( 2010, 8, 1 ), QDate( 2010, 8, 24 ) );
    zone2->setVisible( false );
    zone2->attach( this );

}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void RiuPvtPlotWidget::plotCurves(RiaEclipseUnitTools::UnitSystem unitSystem, const std::vector<RigFlowDiagSolverInterface::PvtCurve>& curveArr, double pressure, double pointMarkerYValue, QString pointMarkerLabel, QString plotTitle, QString yAxisTitle)
{
    m_qwtPlot->detachItems(QwtPlotItem::Rtti_PlotCurve);
    m_qwtPlot->detachItems(QwtPlotItem::Rtti_PlotMarker);
    m_qwtCurveArr.clear();
    m_pvtCurveArr.clear();
    m_trackerPlotMarker = nullptr;


    // Construct an auxiliary curve that connects the first point in all the input curves as a visual aid
    // This should only be shown when the phase being plotted is oil
    // Will not be added to our array of qwt curves since we do not expect the user to interact with it
    {
        std::vector<double> xVals;
        std::vector<double> yVals;
        for (size_t i = 0; i < curveArr.size(); i++)
        {
            const RigFlowDiagSolverInterface::PvtCurve& curve = curveArr[i];
            if (curve.phase == RigFlowDiagSolverInterface::PvtCurve::OIL && curve.pressureVals.size() > 0 && curve.yVals.size() > 0)
            {
                xVals.push_back(curve.pressureVals[0]);
                yVals.push_back(curve.yVals[0]);
            }
        }

        if (xVals.size() > 1)
        {
            QwtPlotCurve* qwtCurve = new QwtPlotCurve();
            qwtCurve->setSamples(xVals.data(), yVals.data(), static_cast<int>(xVals.size()));

            qwtCurve->setStyle(QwtPlotCurve::Lines);
            qwtCurve->setRenderHint(QwtPlotItem::RenderAntialiased, true);

            QColor curveClr = Qt::darkGreen;
            const QPen curvePen(curveClr);
            qwtCurve->setPen(curvePen);

            qwtCurve->attach(m_qwtPlot);
        }
    }


    // Add the primary curves
    for (size_t i = 0; i < curveArr.size(); i++)
    {
        const RigFlowDiagSolverInterface::PvtCurve& curve = curveArr[i];
        QwtPlotCurve* qwtCurve = new QwtPlotCurve();

        CVF_ASSERT(curve.pressureVals.size() == curve.yVals.size());
        qwtCurve->setSamples(curve.pressureVals.data(), curve.yVals.data(), static_cast<int>(curve.pressureVals.size()));

        qwtCurve->setStyle(QwtPlotCurve::Lines);

        QColor curveClr = Qt::magenta;
        if      (curve.phase == RigFlowDiagSolverInterface::PvtCurve::GAS)   curveClr = QColor(Qt::red);
        else if (curve.phase == RigFlowDiagSolverInterface::PvtCurve::OIL)   curveClr = QColor(Qt::green);
        const QPen curvePen(curveClr);
        qwtCurve->setPen(curvePen);

        qwtCurve->setRenderHint(QwtPlotItem::RenderAntialiased, true);

        QwtSymbol* curveSymbol = new QwtSymbol(QwtSymbol::Ellipse);
        curveSymbol->setSize(6, 6);
        curveSymbol->setPen(curvePen);
        curveSymbol->setBrush(Qt::NoBrush);
        qwtCurve->setSymbol(curveSymbol);

        qwtCurve->attach(m_qwtPlot);

        m_qwtCurveArr.push_back(qwtCurve);
    }

    m_pvtCurveArr = curveArr;
    CVF_ASSERT(m_pvtCurveArr.size() == m_qwtCurveArr.size());


    // Add vertical marker line to indicate cell pressure
    if (pressure != HUGE_VAL)
    {
        QwtPlotMarker* lineMarker = new QwtPlotMarker;
        lineMarker->setXValue(pressure);
        lineMarker->setLineStyle(QwtPlotMarker::VLine);
        lineMarker->setLinePen(QPen(QColor(128, 128, 255), 1, Qt::DashLine));
        lineMarker->setLabel(QString("PRESSURE"));
        lineMarker->setLabelAlignment(Qt::AlignTop | Qt::AlignRight);
        lineMarker->setLabelOrientation(Qt::Vertical);
        lineMarker->attach(m_qwtPlot);
    }

    // Then point marker
    if (pressure != HUGE_VAL && pointMarkerYValue != HUGE_VAL)
    {
        QwtPlotMarker* pointMarker = new QwtPlotMarker;
        pointMarker->setValue(pressure, pointMarkerYValue);

        QColor markerClr(128, 0, 255);
        QwtSymbol* symbol = new QwtSymbol(QwtSymbol::Ellipse);
//.........这里部分代码省略.........