void QPaintWidget::drawCircle(QPainter *ppainter)
{
if (circle.radius !=0)
{
ppainter->save();
double posXCenter = scalePointX(circle.pos.x());
double posYCenter = scalePointY(circle.pos.y());
int sizeX = static_cast<int>(circle.radius/((maxX - minX) / canvasWidth()));
int sizeY = static_cast<int>(circle.radius/((maxY - minY) / canvasHeight()));
int size = kmin(sizeX, sizeY);
ppainter->setPen(QPen(Qt::darkGreen, kDrawPenWidth));
ppainter->setBrush(QBrush(Qt::transparent));
ppainter->drawEllipse(
posXCenter-size,
posYCenter-size,
2*size+1,
2*size+1
);
ppainter->restore();
}
}
/**
* Initialize coordinate conversion. To be used before paint anything.
*/
void Plot2D::initPainterCoordinates() {
const double dx = m_upperLeftCorner.x() - m_lowerRightCorner.x();
const double dy = m_lowerRightCorner.y() - m_upperLeftCorner.y();
m_padding.setSize(static_cast<double>(width()), static_cast<double>(height()));
const Padding::Values paddingValues = m_padding.getPaddingValues(Padding::PIXELS);
m_scaleX = (static_cast<double>(width()) * (1.0 - paddingValues.left - paddingValues.right)) / -dx;
m_scaleY = (static_cast<double>(height()) * (1.0 - paddingValues.bottom - paddingValues.top)) / -dy;
m_screenOriginX = scalePointX(0.0);
m_screenOriginY = scalePointY(0.0);
}
/**
* Retrieve the scaled point from plot coordinates to widget coordinates.
*
* @param[in] x \f$X\f$ coordinate.
* @param[in] y \f$Y\f$ coordinate.
*
* @return Point in widget coordinates.
*/
QPointF Plot2D::scalePoint(const double &x, const double &y) const {
const double sx = scalePointX(x);
const double sy = scalePointY(y);
return QPointF(sx, sy);
}
QPointF QPaintWidget::scalePoint(QPointF point)
{
return QPointF(scalePointX(point.x()) , scalePointY(point.y()));
}