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Add min max constuctor to domain
Add min max constuctor to domain

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r221:ce059d3667fe
r221:ce059d3667fe
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domain.cpp
57 lines | 1.1 KiB | text/x-c | CppLexer
#include "domain_p.h"
QTCOMMERCIALCHART_BEGIN_NAMESPACE
Domain::Domain(qreal minX, qreal maxX, qreal minY, qreal maxY):
m_minX(minX),
m_maxX(maxX),
m_minY(minY),
m_maxY(maxY)
{
}
Domain::~Domain()
{
}
qreal Domain::spanX() const
{
Q_ASSERT(m_maxX >= m_minX);
return m_maxX - m_minX;
}
qreal Domain::spanY() const
{
Q_ASSERT(m_maxY >= m_minY);
return m_maxY - m_minY;
}
Domain Domain::subDomain(const QRectF& rect, qreal maxWidth,qreal maxHeight) const
{
Domain domain;
qreal dx = spanX() / maxWidth;
qreal dy = spanY() / maxHeight;
domain.m_minX = m_minX + dx * rect.left();
domain.m_maxX = m_minX + dx * rect.right();
domain.m_minY = m_maxY - dy * rect.bottom();
domain.m_maxY = m_maxY - dy * rect.top();
return domain;
}
bool operator== (const Domain &domain1, const Domain &domain2)
{
return (domain1.m_maxX == domain2.m_maxX &&
domain1.m_maxY == domain2.m_maxY &&
domain1.m_minX == domain2.m_minX &&
domain1.m_minY == domain2.m_minY);
}
bool operator!= (const Domain &domain1, const Domain &domain2)
{
return !(domain1 == domain2);
}
QTCOMMERCIALCHART_END_NAMESPACE