Neuro/gui/NeuroUI/errorplotter.cpp

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#include "errorplotter.h"
#include <QPainter>
ErrorPlotter::ErrorPlotter(QWidget *parent)
: QWidget(parent)
, m_maxErrorValue(0.0)
{
}
QSize ErrorPlotter::minimumSizeHint() const
{
return QSize(100, 100);
}
QSize ErrorPlotter::sizeHint() const
{
return QSize(400, 200);
}
void ErrorPlotter::clear()
{
m_errorValues.clear();
m_maxErrorValue = 0.0;
update();
}
void ErrorPlotter::addErrorValue(double errorValue)
{
m_errorValues.push_back(errorValue);
m_maxErrorValue = std::max<double>(m_maxErrorValue, errorValue);
update();
}
void ErrorPlotter::paintEvent(QPaintEvent *)
{
if (m_errorValues.empty() || m_maxErrorValue == 0)
{
return;
}
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing, true);
painter.translate(0.0, height());
painter.scale(1.0, -1.0);
double errorValueScale = height() / m_maxErrorValue;
auto errorValueIt = m_errorValues.crbegin();
double prevErrorValue = *errorValueIt;
errorValueIt++;
int xPos = width() - 2;
while(errorValueIt != m_errorValues.crend() && xPos >= 0)
{
double currentErrorValue = *errorValueIt;
painter.drawLine(xPos + 1, prevErrorValue * errorValueScale,
xPos, currentErrorValue * errorValueScale);
prevErrorValue = currentErrorValue;
errorValueIt++;
xPos--;
}
}