C++ QwtDoubleInterval::minValue方法代码示例

/**
 * Normalize the value to the range[0,1]
 * @param interval :: The data range
 * @param value :: The data value
 * @returns The fraction along the given interval using the current scale type
 */
double MantidColorMap::normalize(const QwtDoubleInterval &interval,
                                 double value) const {
  // nan numbers have the property that nan != nan, treat nan as being invalid
  if (interval.isNull() || m_num_colors == 0 || boost::math::isnan(value))
    return m_nan;

  const double width = interval.width();
  if (width <= 0.0 || value <= interval.minValue())
    return 0.0;

  if (value >= interval.maxValue())
    return 1.0;

  double ratio(0.0);
  if (m_scale_type == GraphOptions::Linear) {
    ratio = (value - interval.minValue()) / width;
  } else if (m_scale_type == GraphOptions::Power) {
    ratio = (pow(value, m_nth_power) - pow(interval.minValue(), m_nth_power)) /
            (pow(interval.maxValue(), m_nth_power) -
             pow(interval.minValue(), m_nth_power));
  } else {
    // Assume log10 type
    // Have to deal with the possibility that a user has entered 0 as a minimum
    double minValue = interval.minValue();
    if (minValue < LOG_ZERO_CUTOFF) {
      minValue = 1.0;
    }
    ratio = std::log10(value / minValue) /
            std::log10(interval.maxValue() / minValue);
  }
  return ratio;
}

void ContourLinesEditor::insertLevel()
{
	if (!d_spectrogram)
		return;

	int row = table->currentRow();
	DoubleSpinBox *sb = (DoubleSpinBox*)table->cellWidget(row, 0);
	if (!sb)
		return;

	QwtDoubleInterval range = d_spectrogram->data().range();
	double current_value = sb->value();
	double previous_value = range.minValue ();
	sb = (DoubleSpinBox*)table->cellWidget(row - 1, 0);
	if (sb)
		previous_value = sb->value();

	double val = 0.5*(current_value + previous_value);

	table->blockSignals(true);
	table->insertRow(row);

	sb = new DoubleSpinBox();
	sb->setLocale(d_locale);
	sb->setDecimals(d_precision);
	sb->setValue(val);
	sb->setRange(range.minValue (), range.maxValue ());
	connect(sb, SIGNAL(activated(DoubleSpinBox *)), this, SLOT(spinBoxActivated(DoubleSpinBox *)));
    table->setCellWidget(row, 0, sb);

	QPen pen = d_spectrogram->defaultContourPen();
	if (pen.style() == Qt::NoPen)
		pen = d_spectrogram->contourPen (val);

	int width = 80;
	int height = 20;
	QPixmap pix(width, height);
	pix.fill(Qt::white);
	QPainter paint(&pix);
	paint.setRenderHint(QPainter::Antialiasing);
	paint.setPen(pen);
	paint.drawLine(0, height/2, width, height/2);
	paint.end();

	QLabel *lbl = new QLabel();
	lbl->setPixmap(pix);

	table->setCellWidget(row, 1, lbl);
	table->blockSignals(false);

	enableButtons(table->currentRow());
	d_pen_list.insert(row, pen);
}

/*!
  \brief Align an interval to a step size

  The limits of an interval are aligned that both are integer
  multiples of the step size.

  \param interval Interval
  \param stepSize Step size

  \return Aligned interval
*/
QwtDoubleInterval QwtLinearScaleEngine::align(
    const QwtDoubleInterval &interval, double stepSize) const
{
    double x1 = QwtScaleArithmetic::floorEps(interval.minValue(), stepSize);
    if ( QwtScaleArithmetic::compareEps(interval.minValue(), x1, stepSize) == 0 )
        x1 = interval.minValue();

    double x2 = QwtScaleArithmetic::ceilEps(interval.maxValue(), stepSize);
    if ( QwtScaleArithmetic::compareEps(interval.maxValue(), x2, stepSize) == 0 )
        x2 = interval.maxValue();

    return QwtDoubleInterval(x1, x2);
}

/**
 Executes any meta-data loading required.
*/
void MDHWInMemoryLoadingPresenter::executeLoadMetadata() {
  using namespace Mantid::API;

  Workspace_sptr ws = m_repository->fetchWorkspace(m_wsName);
  IMDHistoWorkspace_sptr histoWs =
      boost::dynamic_pointer_cast<Mantid::API::IMDHistoWorkspace>(ws);
  m_wsTypeName = histoWs->id();
  m_specialCoords = histoWs->getSpecialCoordinateSystem();

  MDHWLoadingPresenter::transposeWs(histoWs, m_cachedVisualHistoWs);

  // Set the minimum and maximum of the workspace data.
  QwtDoubleInterval minMaxContainer =
      m_metaDataExtractor->getMinAndMax(histoWs);
  m_metadataJsonManager->setMinValue(minMaxContainer.minValue());
  m_metadataJsonManager->setMaxValue(minMaxContainer.maxValue());

  // Set the instrument which is associated with the workspace.
  m_metadataJsonManager->setInstrument(
      m_metaDataExtractor->extractInstrument(m_cachedVisualHistoWs));

  // Set the special coordinates
  m_metadataJsonManager->setSpecialCoordinates(m_specialCoords);

  // Call base-class extraction method.
  this->extractMetadata(m_cachedVisualHistoWs);
}

QwtValueList QwtLinearScaleEngine::buildMajorTicks(
    const QwtDoubleInterval &interval, double stepSize) const
{
    int numTicks = qRound(interval.width() / stepSize) + 1;
    if ( numTicks > 10000 )
        numTicks = 10000;

    QwtValueList ticks;

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

    return ticks;
}

/*!
  \brief Align an interval to a step size

  The limits of an interval are aligned that both are integer
  multiples of the step size.

  \param interval Interval
  \param stepSize Step size

  \return Aligned interval
*/
QwtDoubleInterval QwtLog10ScaleEngine::align(
    const QwtDoubleInterval &interval, double stepSize) const
{
    const QwtDoubleInterval intv = log10(interval);

    const double x1 = QwtScaleArithmetic::floorEps(intv.minValue(), stepSize);
    const double x2 = QwtScaleArithmetic::ceilEps(intv.maxValue(), stepSize);

    return pow10(QwtDoubleInterval(x1, x2));
}

/*!
  \brief Align an interval to a step size

  The limits of an interval are aligned that both are integer
  multiples of the step size.

  \param interval Interval
  \param stepSize Step size

  \return Aligned interval
*/
QwtDoubleInterval QwtLinearScaleEngine::align(
    const QwtDoubleInterval &interval, double stepSize) const
{
    const double x1 = 
        QwtScaleArithmetic::floorEps(interval.minValue(), stepSize);
    const double x2 = 
        QwtScaleArithmetic::ceilEps(interval.maxValue(), stepSize);

    return QwtDoubleInterval(x1, x2);
}

/*! 
  Construct QwtScaleDiv instance.

  \param interval Interval
  \param ticks List of major, medium and minor ticks
*/
QwtScaleDiv::QwtScaleDiv(
        const QwtDoubleInterval &interval, 
        QwtTickList ticks[NTickTypes]):
    d_lBound(interval.minValue()),
    d_hBound(interval.maxValue()),
    d_isValid(true)
{
    for ( int i = 0; i < NTickTypes; i++ )
        d_ticks[i] = ticks[i];
}

/*!
  \brief Align an interval to a step size

  The limits of an interval are aligned that both are integer
  multiples of the step size.

  \param interval Interval
  \param stepSize Step size

  \return Aligned interval
*/
QwtDoubleInterval Log2ScaleEngine::align(
    const QwtDoubleInterval &interval, double stepSize) const
{
    const QwtDoubleInterval intv = log2(interval);

    const double x1 = QwtScaleArithmetic::floorEps(intv.minValue(), stepSize);
    const double x2 = QwtScaleArithmetic::ceilEps(intv.maxValue(), stepSize);

    return QwtDoubleInterval(pow(2, x1), pow(2, x2));
}

QwtDoubleRect QwtIntervalData::boundingRect() const
{
    double minX, maxX, minY, maxY;
    minX = maxX = minY = maxY = 0.0;

    bool isValid = false;

    const size_t sz = size();
    for ( size_t i = 0; i < sz; i++ )
    {
        const QwtDoubleInterval intv = interval(i);
        if ( !intv.isValid() )
            continue;

        const double v = value(i);

        if ( !isValid )
        {
            minX = intv.minValue();
            maxX = intv.maxValue();
            minY = maxY = v;

            isValid = true;
        }
        else
        {
            if ( intv.minValue() < minX )
                minX = intv.minValue();
            if ( intv.maxValue() > maxX )
                maxX = intv.maxValue();

            if ( v < minY )
                minY = v;
            if ( v > maxY )
                maxY = v;
        }
    }
    if ( !isValid )
        return QwtDoubleRect(1.0, 1.0, -2.0, -2.0); // invalid

    return QwtDoubleRect(minX, minY, maxX - minX, maxY - minY);
}

void EditColorMap::SetData (
    const QwtIntervalData& intervalData, double maxValue,
    const ColorBarModel& colorBarModel, bool gridEnabled)
{
    m_colorMap = colorBarModel;
    setCombos (m_colorMap.GetPalette ());
    widgetHistogram->SetDataAllBinsSelected (
	intervalData, maxValue, 
	m_colorMap.GetTitle ().c_str ());
    widgetHistogram->SetColorTransferFunction (
	m_colorMap.GetInterval (), m_colorMap.GetQwtColorMap ());
    widgetHistogram->SetGridEnabled (gridEnabled);
    QwtDoubleInterval interval = m_colorMap.GetInterval ();
    QwtDoubleInterval clampValues = m_colorMap.GetClampInterval ();
    if (clampValues.minValue () > interval.minValue ())
	widgetHistogram->SetItemsSelectionLow (false, clampValues.minValue ());
    if (clampValues.maxValue () < interval.maxValue ())
	widgetHistogram->SetItemsSelectionHigh (false, clampValues.maxValue ());
    setHighlightColors ();
 }

/*!
  Map a value of a given interval into a rgb value

  \param interval Range for all values
  \param value Value to map into a rgb value
*/
QRgb QwtLinearColorMap::rgb(
    const QwtDoubleInterval &interval, double value) const
{
    const double width = interval.width();

    double ratio = 0.0;
    if ( width > 0.0 )
        ratio = (value - interval.minValue()) / width;

    return d_data->colorStops.rgb(d_data->mode, ratio);
}

/*!
  Map a value of a given interval into a rgb value

  \param interval Range for all values
  \param value Value to map into a rgb value
*/
QRgb LinearTransparentColorMap::rgb(
    const QwtDoubleInterval& interval, double value) const
{
    const double width = interval.width();

    double ratio = 0.0;
    if (width > 0.0)
        ratio = (value - interval.minValue()) / width;
    if (ratio < 0)
        return qRgba(0, 0, 0, 0);
    return d_data->colorStops.rgb(d_data->mode, ratio);
}

/*!
   \brief Calculate a scale division

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

   \sa QwtScaleEngine::stepSize, LogTimeScaleEngine::subDivide
*/
QwtScaleDiv LogTimeScaleEngine::divideScale(double x1, double x2,
    int maxMajSteps, int maxMinSteps, double stepSize) const
{
    QwtDoubleInterval interval = QwtDoubleInterval(x1, x2).normalized();
    interval = interval.limited(LOG_MIN, LOG_MAX);

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

    if (interval.maxValue() / interval.minValue() < 10.0)
    {
        // scale width is less than one decade -> build linear scale
    
        QwtLinearScaleEngine linearScaler;
        linearScaler.setAttributes(attributes());
        linearScaler.setReference(reference());
        linearScaler.setMargins(
                                #if (QWT_VERSION >= 0x050200)
				lowerMargin(), upperMargin()
				#else
				loMargin(), hiMargin()
				#endif
				);

        return linearScaler.divideScale(x1, x2, 
            maxMajSteps, maxMinSteps, stepSize);
    }

    stepSize = qwtAbs(stepSize);
    if ( stepSize == 0.0 )
    {
        if ( maxMajSteps < 1 )
            maxMajSteps = 1;

        stepSize = divideInterval(log10(interval).width(), maxMajSteps);
        if ( stepSize < 1.0 )
            stepSize = 1.0; // major step must be >= 1 decade
    }

    QwtScaleDiv scaleDiv;
    if ( stepSize != 0.0 )
    {
        QwtValueList ticks[QwtScaleDiv::NTickTypes];
        buildTicks(interval, stepSize, maxMinSteps, ticks);

        scaleDiv = QwtScaleDiv(interval, ticks);
    }

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

    return scaleDiv;
}

/*!
  Map a value of a given interval into a color index, between 0 and 255

  \param interval Range for all values
  \param value Value to map into a color index
*/
unsigned char QwtLinearColorMap::colorIndex(
    const QwtDoubleInterval &interval, double value) const
{
    const double width = interval.width();

    if ( width <= 0.0 || value <= interval.minValue() )
        return 0;

    if ( value >= interval.maxValue() )
        return (unsigned char)255;

    const double ratio = (value - interval.minValue()) / width;

    unsigned char index;
    if ( d_data->mode == FixedColors )
        index = (unsigned char)(ratio * 255); // always floor
    else
        index = (unsigned char)qRound(ratio * 255);

    return index;
}