C++ QwtInterval::maxValue方法代码示例

static inline long double qwtIntervalWidthL( const QwtInterval &interval )
{
    if ( !interval.isValid() )
        return 0.0;

    return static_cast<long double>( interval.maxValue() )
        - static_cast<long double>( interval.minValue() );
}

/*!
   \brief Calculate a scale division for an interval

   \param x1 First interval limit
   \param x2 Second interval limit
   \param maxMajorSteps Maximum for the number of major steps
   \param maxMinorSteps Maximum number of minor steps
   \param stepSize Step size. If stepSize == 0, the engine
                   calculates one.

   \return Calculated scale division
*/
QwtScaleDiv QwtLogScaleEngine::divideScale( double x1, double x2,
    int maxMajorSteps, int maxMinorSteps, double stepSize ) const
{
    QwtInterval interval = QwtInterval( x1, x2 ).normalized();
    interval = interval.limited( LOG_MIN, LOG_MAX );

    if ( interval.width() <= 0 )
        return QwtScaleDiv();

    const double logBase = base();

    if ( interval.maxValue() / interval.minValue() < logBase )
    {
        // scale width is less than one decade -> build linear scale

        QwtLinearScaleEngine linearScaler;
        linearScaler.setAttributes( attributes() );
        linearScaler.setReference( reference() );
        linearScaler.setMargins( lowerMargin(), upperMargin() );

        if ( stepSize != 0.0 )
        {
            if ( stepSize < 0.0 )
                stepSize = -qPow( logBase, -stepSize );
            else
                stepSize = qPow( logBase, stepSize );
        }

        return linearScaler.divideScale( x1, x2,
            maxMajorSteps, maxMinorSteps, stepSize );
    }

    stepSize = qAbs( stepSize );
    if ( stepSize == 0.0 )
    {
        if ( maxMajorSteps < 1 )
            maxMajorSteps = 1;

        stepSize = divideInterval( 
            qwtLogInterval( logBase, interval ).width(), maxMajorSteps );
        if ( stepSize < 1.0 )
            stepSize = 1.0; // major step must be >= 1 decade
    }

    QwtScaleDiv scaleDiv;
    if ( stepSize != 0.0 )
    {
        QList<double> ticks[QwtScaleDiv::NTickTypes];
        buildTicks( interval, stepSize, maxMinorSteps, ticks );

        scaleDiv = QwtScaleDiv( interval, ticks );
    }

    if ( x1 > x2 )
        scaleDiv.invert();

    return scaleDiv;
}

Plot::Plot( QWidget *parent ):
    QwtPlot( parent ),
    d_formatType( 0 ),
    d_alpha(255)
{
    d_spectrogram = new QwtPlotSpectrogram();
    d_spectrogram->setRenderThreadCount( 0 ); // use system specific thread count
    d_spectrogram->setCachePolicy( QwtPlotRasterItem::PaintCache );

    QList<double> contourLevels;
    for ( double level = 0.5; level < 10.0; level += 1.0 )
        contourLevels += level;
    d_spectrogram->setContourLevels( contourLevels );

    d_spectrogram->setData( new SpectrogramData() );
    d_spectrogram->attach( this );

    const QwtInterval zInterval = d_spectrogram->data()->interval( Qt::ZAxis );

    // A color bar on the right axis
    QwtScaleWidget *rightAxis = axisWidget( QwtPlot::yRight );
    rightAxis->setTitle( "Intensity" );
    rightAxis->setColorBarEnabled( true );

    setAxisScale( QwtPlot::yRight, zInterval.minValue(), zInterval.maxValue() );
    enableAxis( QwtPlot::yRight );

    plotLayout()->setAlignCanvasToScales( true );

    setColorMap( Plot::RGBMap );

    // LeftButton for the zooming
    // MidButton for the panning
    // RightButton: zoom out by 1
    // Ctrl+RighButton: zoom out to full size

    QwtPlotZoomer* zoomer = new MyZoomer( canvas() );
    zoomer->setMousePattern( QwtEventPattern::MouseSelect2,
        Qt::RightButton, Qt::ControlModifier );
    zoomer->setMousePattern( QwtEventPattern::MouseSelect3,
        Qt::RightButton );

    QwtPlotPanner *panner = new QwtPlotPanner( canvas() );
    panner->setAxisEnabled( QwtPlot::yRight, false );
    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 );
}

static inline bool qwtIsSampleInside( const QwtOHLCSample &sample,
    double tMin, double tMax, double vMin, double vMax )
{
    const double t = sample.time;
    const QwtInterval interval = sample.boundingInterval();

    const bool isOffScreen = ( t < tMin ) || ( t > tMax )
        || ( interval.maxValue() < vMin ) || ( interval.minValue() > vMax );

    return !isOffScreen;
}

void matrixofpixels::PixPlotSpect(int TypeOfSpec,QwtMatrixRasterData *rasterpixdata)
{
    changeitems();
    MapPlot->setData(rasterpixdata);
    MapPlot->setRenderThreadCount(0);
    setAxisAutoScale(this->xTop);
    setAxisAutoScale(this->xBottom);



    switch (TypeOfSpec)
    {
    case 1:
        MapPlot->setColorMap(new ColorMap(BLUERED));
        break;
    case 2:
        MapPlot->setColorMap(new ColorMap(BLACKWHITE));
        break;
    default:
        MapPlot->setColorMap(new ColorMap(BLUERED));
    }

    MapPlot->attach(/*MainPlot*/this);

    const QwtInterval zInterval = MapPlot->data()->interval(Qt::ZAxis);

    setAxisScale(QwtPlot::xBottom, 0, Npix);
    setAxisMaxMinor(QwtPlot::xBottom, 0);
    setAxisScale(QwtPlot::yLeft, 0, Npix);
    setAxisMaxMinor(QwtPlot::yLeft, 0);

    //rightAxis = new QwtScaleWidget();
    QwtScaleWidget *rightAxis = axisWidget(QwtPlot::yRight);

    //rightAxis = axisWidget(QwtPlot::yRight);
    rightAxis->setColorBarEnabled(true);
    rightAxis->setColorBarWidth(20);
    rightAxis->setColorMap(zInterval, new ColorMap(TypeOfSpec) );
    //ColorMap(TypeOfSpec);

    plotLayout()->setAlignCanvasToScales(true);

    setAxisScale(QwtPlot::yRight,zInterval.minValue(),zInterval.maxValue());
    enableAxis(QwtPlot::yRight);
    replot();
    setAutoFillBackground(true);

    /**
      setAutoFillBackground(true); - autozapolnenie, ctobi isklyuchit'
    nalozjeniya graphikov
    */

}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void RiuSummaryQwtPlot::setZoomWindow(const QwtInterval& leftAxis, const QwtInterval& rightAxis, const QwtInterval& timeAxis)
{
    {
        QRectF zoomWindow;
        zoomWindow.setLeft(timeAxis.minValue());
        zoomWindow.setRight(timeAxis.maxValue());
        zoomWindow.setTop(leftAxis.maxValue());
        zoomWindow.setBottom(leftAxis.minValue());

        m_zoomerLeft->zoom(zoomWindow);
    }

    {
        QRectF zoomWindow;
        zoomWindow.setLeft(timeAxis.minValue());
        zoomWindow.setRight(timeAxis.maxValue());
        zoomWindow.setTop(rightAxis.maxValue());
        zoomWindow.setBottom(rightAxis.minValue());

        m_zoomerRight->zoom(zoomWindow);
    }
}

/*!
   \return Bounding rectangle of the data
   \sa QwtPlotRasterItem::interval()
*/
QRectF QwtPlotRasterItem::boundingRect() const
{
    const QwtInterval intervalX = interval( Qt::XAxis );
    const QwtInterval intervalY = interval( Qt::YAxis );

    if ( !intervalX.isValid() && !intervalY.isValid() )
        return QRectF(); // no bounding rect

    QRectF r;

    if ( intervalX.isValid() )
    {
        r.setLeft( intervalX.minValue() );
        r.setRight( intervalX.maxValue() );
    }
    else
    {
        const float max = std::numeric_limits<float>::max();

        r.setLeft( -0.5 * max );
        r.setWidth( max );
    }

    if ( intervalY.isValid() )
    {
        r.setTop( intervalY.minValue() );
        r.setBottom( intervalY.maxValue() );
    }
    else
    {
        const float max = std::numeric_limits<float>::max();

        r.setTop( -0.5 * max );
        r.setHeight( max );
    }

    return r.normalized();
}

/*!
  Check if an interval "contains" a value

  \param interval Interval
  \param value Value

  \return True, when the value is inside the interval
*/
bool QwtScaleEngine::contains(
    const QwtInterval &interval, double value ) const
{
    if ( !interval.isValid() )
        return false;

    if ( qwtFuzzyCompare( value, interval.minValue(), interval.width() ) < 0 )
        return false;

    if ( qwtFuzzyCompare( value, interval.maxValue(), interval.width() ) > 0 )
        return false;

    return true;
}

void QwtPolarPlot::updateScale( int scaleId )
{
    if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
        return;

    ScaleData &d = d_data->scaleData[scaleId];

    double minValue = d.minValue;
    double maxValue = d.maxValue;
    double stepSize = d.stepSize;

    if ( scaleId == QwtPolar::ScaleRadius && d.doAutoScale )
    {
        QwtInterval interval;

        const QwtPolarItemList& itmList = itemList();
        for ( QwtPolarItemIterator it = itmList.begin();
                it != itmList.end(); ++it )
        {
            const QwtPolarItem *item = *it;
            if ( item->testItemAttribute( QwtPolarItem::AutoScale ) )
                interval |= item->boundingInterval( scaleId );
        }

        minValue = interval.minValue();
        maxValue = interval.maxValue();

        d.scaleEngine->autoScale( d.maxMajor,
                                  minValue, maxValue, stepSize );
        d.scaleDiv.invalidate();
    }

    if ( !d.scaleDiv.isValid() )
    {
        d.scaleDiv = d.scaleEngine->divideScale(
            minValue, maxValue, d.maxMajor, d.maxMinor, stepSize );
    }

    const QwtInterval interval = visibleInterval();

    const QwtPolarItemList& itmList = itemList();
    for ( QwtPolarItemIterator it = itmList.begin();
            it != itmList.end(); ++it )
    {
        QwtPolarItem *item = *it;
        item->updateScaleDiv( *scaleDiv( QwtPolar::Azimuth ),
            *scaleDiv( QwtPolar::Radius ), interval );
    }
}

/*!
   \brief Calculate major ticks for an interval

   \param interval Interval
   \param stepSize Step size

   \return Calculated ticks
*/
QList<double> QwtLogScaleEngine::buildMajorTicks(
    const QwtInterval &interval, double stepSize ) const
{
    double width = qwtLogInterval( base(), interval ).width();

    int numTicks = qRound( width / stepSize ) + 1;
    if ( numTicks > 10000 )
        numTicks = 10000;

    const double lxmin = ::log( interval.minValue() );
    const double lxmax = ::log( interval.maxValue() );
    const double lstep = ( lxmax - lxmin ) / double( numTicks - 1 );

    QList<double> ticks;

    ticks += interval.minValue();

    for ( int i = 1; i < numTicks - 1; i++ )
        ticks += qExp( lxmin + double( i ) * lstep );

    ticks += interval.maxValue();

    return ticks;
}

/*!
   \brief Calculate major ticks for an interval

   \param interval Interval
   \param stepSize Step size

   \return Calculated ticks
*/
QList<double> QwtLinearScaleEngine::buildMajorTicks(
    const QwtInterval &interval, double stepSize ) const
{
    int numTicks = qRound( interval.width() / stepSize ) + 1;
    if ( numTicks > 10000 )
        numTicks = 10000;

    QList<double> ticks;

    ticks += interval.minValue();
    for ( int i = 1; i < numTicks - 1; i++ )
        ticks += interval.minValue() + i * stepSize;
    ticks += interval.maxValue();

    return ticks;
}

Plot::Plot( QWidget *parent, const QwtInterval &interval ):
    QwtPlot( parent )
{
    for ( int axis = 0; axis < QwtPlot::axisCnt; axis ++ )
        setAxisScale( axis, interval.minValue(), interval.maxValue() );

    setCanvasBackground( QColor( Qt::darkBlue ) );
    plotLayout()->setAlignCanvasToScales( true );

    // grid
    QwtPlotGrid *grid = new QwtPlotGrid;
    //grid->enableXMin(true);
    grid->setMajorPen( Qt::white, 0, Qt::DotLine );
    grid->setMinorPen( Qt::gray, 0 , Qt::DotLine );
    grid->attach( this );

    const int numEllipses = 10;

    for ( int i = 0; i < numEllipses; i++ )
    {
        const double x = interval.minValue() +
            qrand() % qRound( interval.width() );
        const double y = interval.minValue() +
            qrand() % qRound( interval.width() );
        const double r = interval.minValue() +
            qrand() % qRound( interval.width() / 6 );

        const QRectF area( x - r, y - r , 2 * r, 2 * r );

        RectItem *item = new RectItem( RectItem::Ellipse );
        item->setRenderHint( QwtPlotItem::RenderAntialiased, true );
        item->setRect( area );
        item->setPen( QPen( Qt::yellow ) );
        item->attach( this );
    }

    TextItem *textItem = new TextItem();
    textItem->setText( "Navigation Example" );
    textItem->attach( this );

    d_rectOfInterest = new RectItem( RectItem::Rect );
    d_rectOfInterest->setPen( Qt::NoPen );
    QColor c = Qt::gray;
    c.setAlpha( 100 );
    d_rectOfInterest->setBrush( QBrush( c ) );
    d_rectOfInterest->attach( this );
}

void Spectrogramplot::setZAxisScale(double zMin, double zMax)
{
  zMin_ = zMin;
  zMax_ = zMax;
  data_->setInterval( Qt::ZAxis, QwtInterval( zMin_, zMax_ ) );

  //Set up the intensity bar on the right
  const QwtInterval zInterval = spectrogram_->data()->interval( Qt::ZAxis );
  QwtScaleWidget *rightAxis = axisWidget(QwtPlot::yRight);
  rightAxis->setColorBarEnabled(true);
  rightAxis->setColorMap( zInterval, new ColorMap());
  setAxisScale(QwtPlot::yRight, zInterval.minValue(), zInterval.maxValue() );
  enableAxis(QwtPlot::yRight);

  plotLayout()->setAlignCanvasToScales(true);
  replot();
}

static inline bool isCombinable( const QwtInterval &d1,
    const QwtInterval &d2 )
{
    if ( d1.isValid() && d2.isValid() )
    {
        if ( d1.maxValue() == d2.minValue() )
        {
            if ( !( d1.borderFlags() & QwtInterval::ExcludeMaximum
                && d2.borderFlags() & QwtInterval::ExcludeMinimum ) )
            {
                return true;
            }
        }
    }

    return false;
}

void SaxsviewImage::setFrame(SaxsviewFrame *frame) {
  if (p->frame)
    p->frame->detach();

  p->frame = frame;
  frame->attach(this);

  if (frame->data()) {
    const QwtInterval range = p->frame->data()->interval(Qt::ZAxis);
    axisWidget(QwtPlot::yRight)->setColorBarInterval(range);
    setAxisScale(QwtPlot::yRight, range.minValue(), range.maxValue());
  }

  setZoomBase(p->frame->boundingRect());

  replot();
}