Method PaintHistogram

Modules/QtWidgetsExt/src/QmitkTransferFunctionCanvas.cpp:151–184

}

void QmitkTransferFunctionCanvas::PaintHistogram(QPainter &p)
{
  if (m_Histogram)
  {
    p.save();

    p.setPen(Qt::gray);

    int displayWidth = contentsRect().width();
    int displayHeight = contentsRect().height();

    double windowLeft = m_Lower;
    double windowRight = m_Upper;

    double step = (windowRight - windowLeft) / double(displayWidth);

    double pos = windowLeft;

    for (int x = 0; x < displayWidth; x++)
    {
      double left = pos;
      double right = pos + step;

      float height = m_Histogram->GetRelativeBin(left, right);

      if (height >= 0)
        p.drawLine(x, displayHeight * (1 - height), x, displayHeight);

      pos += step;
    }

    p.restore();
  }
}

void QmitkTransferFunctionCanvas::keyPressEvent(QKeyEvent *e)
{