void QHistogram::realPaintEvent(QPaintEvent *)
{
QPainter painter(this);
painter.drawImage(rect(),*m_panelImage);
Histogram* histogram = m_pTFEditor->getHistogram();
if(histogram != NULL)
{
if(m_histogramType == 2) //bar
{
painter.setBrush(QColor(255,255,0,150));//Qt::yellow);
painter.setPen(Qt::blue);
for(unsigned int x=0;x<(unsigned int)histogram->getLength();++x)
{
float binheight = 1;
if(m_yTransform == 1)
binheight = 1e-5 + (log10((float)(*histogram)[x] + 1)/m_histogramMax) * m_binMaxHeight;
else
binheight = ((float)(*histogram)[x])/m_histogramMax * m_binMaxHeight;
float xpos = (float)(m_panelLMargin + 1)+ (float)x * m_binWidth;
float ypos = m_panelUMargin + m_panelHeight - binheight;
QRect binobj(xpos,ypos,m_binWidth,binheight);
painter.drawRect(binobj);
}
}
else if(m_histogramType == 1) // curve
{
if(!m_histogramMax)
return;
painter.setBrush(QColor(255,255,0,150));
painter.setPen(Qt::blue);
QPainterPath path;
path.moveTo(m_panelLMargin,m_panelUMargin+m_panelHeight);
for(unsigned int x=0;x<(unsigned int)histogram->getLength();++x)
{
float binheight = 1;
if(m_yTransform == 1)
binheight = 1e-5 + (log10((float)(*histogram)[x] + 1)/m_histogramMax) * m_binMaxHeight;
else
binheight = ((float)(*histogram)[x])/m_histogramMax * m_binMaxHeight;
float xpos = (float)(m_panelLMargin)+ (float)x * m_binWidth + 0.5*m_binWidth;
float ypos = m_panelUMargin + m_panelHeight - binheight;
path.lineTo(xpos,ypos);
}
path.lineTo(rect().width()-m_panelRMargin,m_panelUMargin+m_panelHeight);
painter.drawPath(path);
}
}
}
void QHistogram::updateHistogram()
{
Histogram* histogram = m_pTFEditor->getHistogram();
if(histogram != NULL)
{
m_histogramMax = -1e10;
m_histogramMin = 1e10;
m_binWidth = (float)(m_panelWidth - 2)/ histogram->getLength();
m_binMaxHeight = 0.98*m_panelHeight;
if(m_yTransform == 0) // linear
{
for(unsigned int x=0;x<histogram->getLength();++x)
{
if(m_histogramMax < (*histogram)[x])
m_histogramMax = (*histogram)[x];
if(m_histogramMin > (*histogram)[x])
m_histogramMin = (*histogram)[x];
}
}
else if(m_yTransform == 1) // log
{
for(unsigned int x=0;x<histogram->getLength();++x)
{
if(m_histogramMax < log10((float)(*histogram)[x] + 1))
m_histogramMax = log10((float)(*histogram)[x] + 1)+1e-10;
if(m_histogramMin > log10((float)(*histogram)[x] + 1))
m_histogramMin = log10((float)(*histogram)[x] + 1)+1e-10;
if(fabs(m_histogramMin) < 1e-10f)
m_histogramMin = 1e-10f;
}
}
repaint();
}
}
