static inline bool apply(Ratio const& lhs, Ratio const& rhs)
{
BOOST_ASSERT(lhs.denominator() != 0);
BOOST_ASSERT(rhs.denominator() != 0);
return lhs.numerator() * rhs.denominator()
< rhs.numerator() * lhs.denominator();
}
static inline bool apply(Ratio const& lhs, Ratio const& rhs)
{
BOOST_ASSERT(lhs.denominator() != 0);
BOOST_ASSERT(rhs.denominator() != 0);
return geometry::math::equals
(
lhs.numerator() * rhs.denominator(),
rhs.numerator() * lhs.denominator()
);
}
void FractionBaseWidget::paintRatio(QPainter & paint, Ratio tmp_ratio, int & x_pos, int & y_pos, QFontMetrics & fm, bool show_mixed, bool addMargin, bool show_center)
{
QPen pen = paint.pen(); // get the pen
int fontHeight = fm.lineSpacing(); // get the font height
int int_numerator, int_denominator, int_mixed;
QString str_numerator, str_denominator;
QString str_mixed;
int fontWidth; // to store the width of the last thing painted
int tmp_int;
// check if we have to show the ratio as mixed number
// 11 1
// if yes, -- becomes 2 -
// 5 5
int_numerator = tmp_ratio.numerator();
int_denominator = tmp_ratio.denominator();
if (show_mixed == true && qAbs(int_numerator) >= qAbs(int_denominator)) {
// calculate the mixed number
int_mixed = int (int_numerator / int_denominator);
// the negative sign is in front of the mixed number
int_numerator = qAbs(int_numerator);
int_denominator = qAbs(int_denominator);
// we have to reduce the numerator by the mixed number * denominator
int_numerator = int_numerator % int_denominator;
// now we can convert the numbers into strings for painting
str_mixed.setNum(int_mixed);
str_numerator.setNum(int_numerator);
str_denominator.setNum(int_denominator);
// paint the front part of the mixed number
paintMiddle(paint, str_mixed, x_pos, y_pos, fm, m_colorNumber);
} else {
// don't show the ratio as mixed number
str_numerator.setNum(int_numerator);
str_denominator.setNum(int_denominator);
} // if (show_mixed == true && qAbs(int_numerator) > qAbs(int_denominator))
// get the text width of the current ratio
fontWidth = fm.width(str_numerator);
tmp_int = fm.width(str_denominator);
if (tmp_int > fontWidth)
fontWidth = tmp_int;
// show numerator and denominator in m_colorNumber
pen.setColor(m_colorNumber);
paint.setPen(pen);
// make sure we don't display something like: 0
// 7 -
// 3
if (!(show_mixed == true && int_numerator == 0)) {
if (show_center == true)
x_pos = 80 - fontWidth / 2;
if (!(int_denominator == 1 && show_mixed == false)) {
// paint the numerator
paint.drawText(x_pos, y_pos, fontWidth, fontHeight, Qt::AlignCenter, str_numerator);
// paint the fraction line between numerator and denominator
paint.fillRect(x_pos, y_pos + fontHeight + 4, fontWidth, 2, m_colorLine);
// paint the denominator
paint.drawText(x_pos, y_pos + fontHeight + 10, fontWidth, fontHeight, Qt::AlignCenter, str_denominator);
} else {
// paint the numerator and move the y position down to align with the + signal
paint.drawText(x_pos, y_pos + fontHeight - fontHeight / 2, fontWidth,
fontHeight, Qt::AlignCenter, str_numerator);
}
// move the x position to the right by adding the width used for painting
// the ratio and a margin
x_pos += fontWidth;
if (addMargin == true)
x_pos += _MARGIN_X;
}
return;
}
static inline bool apply(Ratio const& lhs, Ratio const& rhs)
{
return boost::rational<Type>(lhs.numerator(), lhs.denominator())
== boost::rational<Type>(rhs.numerator(), rhs.denominator());
}