Esempio n. 1
0
void RangeHistogram::mouseMoveEvent(QMouseEvent *e)
{
  QPoint pos = e->pos();
  if(ValidRange() && (e->buttons() & Qt::LeftButton) && pos != m_MousePrev)
  {
    if(m_DragMode == DraggingMode::White)
    {
      float newWhite = (float)(pos.x() - totalSpace()) / (float)regionWidth();

      setWhiteDelta(qBound(blackDelta() + m_MinRangeSize, newWhite, 1.0f));
    }
    else if(m_DragMode == DraggingMode::Black)
    {
      float newBlack = (float)(pos.x() - totalSpace()) / (float)regionWidth();

      setBlackDelta(qBound(0.0f, newBlack, whiteDelta() - m_MinRangeSize));
    }

    emit rangeUpdated();

    if(m_DragMode != DraggingMode::None)
      update();

    m_MousePrev = pos;
  }
}
//--------------------------------------------------------------------------------------------------
/// Sets the max and min level of the legend. If the levels previously has been set with setLevelsFromValues() 
/// only the values between the new max min range becomes visible.
//--------------------------------------------------------------------------------------------------
void ScalarMapperRangeBased::setRange(double min, double max)
{
    m_rangeMin = min;
    m_rangeMax = max;
    updateSortedLevels();
    rangeUpdated();
}
Esempio n. 3
0
void RangeHistogram::setWhitePoint(float val)
{
  if(val >= m_RangeMax)
    m_WhitePoint = m_RangeMax = val;
  else
    m_WhitePoint = val;

  update();
  emit rangeUpdated();
}
Esempio n. 4
0
void RangeHistogram::setBlackPoint(float val)
{
  if(val <= m_RangeMin)
    m_BlackPoint = m_RangeMin = val;
  else
    m_BlackPoint = val;

  update();
  emit rangeUpdated();
}
Esempio n. 5
0
// sets the minimum and maximum as well as the black and white points
void RangeHistogram::setRange(float min, float max)
{
  m_RangeMin = min;
  if(min < 0.0f)
    m_RangeMax = qMax((min - FLT_EPSILON) * (1.0f - m_MinRangeSize), max);
  else
    m_RangeMax = qMax((min + FLT_EPSILON) * (1.0f + m_MinRangeSize), max);

  m_BlackPoint = m_RangeMin;
  m_WhitePoint = m_RangeMax;

  update();
  emit rangeUpdated();
}
Esempio n. 6
0
void RangeHistogram::mousePressEvent(QMouseEvent *e)
{
  if(e->button() != Qt::LeftButton || !ValidRange())
    return;

  QRect r = rect();

  r.marginsRemoved(QMargins(totalSpace(), totalSpace(), totalSpace(), totalSpace()));

  int whiteX = (int)(whiteDelta() * r.width());
  int blackX = (int)(blackDelta() * r.width());

  QPointF whiteVec(whiteX - e->pos().x(), rect().height() - e->pos().y());
  QPointF blackVec(blackX - e->pos().x(), e->pos().y());

  float whitedist = (float)sqrt(whiteVec.x() * whiteVec.x() + whiteVec.y() * whiteVec.y());
  float blackdist = (float)sqrt(blackVec.x() * blackVec.x() + blackVec.y() * blackVec.y());

  if(whitedist < blackdist && whitedist < 18.0f)
    m_DragMode = DraggingMode::White;
  else if(blackdist < whitedist && blackdist < 18.0f)
    m_DragMode = DraggingMode::Black;
  else if(e->pos().x() > whiteX)
    m_DragMode = DraggingMode::White;
  else if(e->pos().x() < blackX)
    m_DragMode = DraggingMode::Black;

  if(m_DragMode == DraggingMode::White)
  {
    float newWhite = (float)(e->pos().x() - totalSpace()) / (float)regionWidth();

    setWhiteDelta(qBound(blackDelta() + m_MinRangeSize, newWhite, 1.0f));
  }
  else if(m_DragMode == DraggingMode::Black)
  {
    float newBlack = (float)(e->pos().x() - totalSpace()) / (float)regionWidth();

    setBlackDelta(qBound(0.0f, newBlack, whiteDelta() - m_MinRangeSize));
  }

  emit rangeUpdated();

  if(m_DragMode != DraggingMode::None)
    update();

  m_MousePrev = e->pos();
}