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domain.cpp
257 lines | 6.1 KiB | text/x-c | CppLexer
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r131 #include "domain_p.h"
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r678 #include <cmath>
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r131
QTCOMMERCIALCHART_BEGIN_NAMESPACE
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r439 Domain::Domain(QObject* parent):QObject(parent),
m_minX(0),
m_maxX(0),
m_minY(0),
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r531 m_maxY(0),
m_tickXCount(5),
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r678 m_tickYCount(5),
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r687 m_niceNumbers(false)
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r131 {
}
Domain::~Domain()
{
}
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r439 void Domain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY)
{
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r678 setRange(minX, maxX, minY, maxY,m_tickXCount,m_tickYCount);
}
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r439
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r678 void Domain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY,int tickXCount,int tickYCount)
{
bool domainChanged = false;
bool tickXChanged = false;
bool tickYChanged = false;
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r439
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r678 if(m_tickXCount!=tickXCount) {
m_tickXCount=tickXCount;
tickXChanged=true;
}
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r439
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Bugfix extra signal emited when scroling verticaly in domain.cpp
r695 if(m_tickYCount!=tickYCount) {
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r679 m_tickYCount=tickYCount;
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r678 tickYChanged=true;
}
if(m_minX!=minX || m_maxX!=maxX) {
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r687 if(m_niceNumbers) looseNiceNumbers(minX, maxX, m_tickXCount);
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r678 m_minX=minX;
m_maxX=maxX;
domainChanged=true;
tickXChanged=false;
emit rangeXChanged(minX,maxX, m_tickXCount);
}
if(m_minY!=minY || m_maxY!=maxY) {
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r687 if(m_niceNumbers) looseNiceNumbers(minY, maxY, m_tickYCount);
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r678 m_minY=minY;
m_maxY=maxY;
domainChanged=true;
tickYChanged=false;
emit rangeYChanged(minY,maxY, m_tickYCount);
}
if(domainChanged) {
emit this->domainChanged(m_minX, m_maxX, m_minY, m_maxY);
}
if(tickXChanged) {
emit rangeXChanged(minX,maxX, m_tickXCount);
}
if(tickYChanged) {
emit rangeYChanged(minY,maxY, m_tickYCount);
}
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r439 }
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r678
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r439 void Domain::setRangeX(qreal min, qreal max)
{
setRange(min,max,m_minY, m_maxY);
}
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r679
void Domain::setRangeX(qreal min, qreal max, int tickCount)
{
setRange(min,max,m_minY, m_maxY,tickCount,m_tickYCount);
}
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r439 void Domain::setRangeY(qreal min, qreal max)
{
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r678 setRange(m_minX, m_maxX, min, max);
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r439 }
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r679 void Domain::setRangeY(qreal min, qreal max,int tickCount)
{
setRange(m_minX, m_maxX, min, max,m_tickXCount,tickCount);
}
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r439 void Domain::setMinX(qreal min)
{
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r678 setRange(min, m_maxX, m_minY, m_maxY);
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r439 }
void Domain::setMaxX(qreal max)
{
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r678 setRange(m_minX, max, m_minY, m_maxY);
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r439 }
void Domain::setMinY(qreal min)
{
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r678 setRange(m_minX, m_maxX, min, m_maxY);
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r439 }
void Domain::setMaxY(qreal max)
{
setRange(m_minX, m_maxX, m_minY, max);
}
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r131 qreal Domain::spanX() const
{
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r439 Q_ASSERT(m_maxX >= m_minX);
return m_maxX - m_minX;
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r131 }
qreal Domain::spanY() const
{
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r439 Q_ASSERT(m_maxY >= m_minY);
return m_maxY - m_minY;
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r131 }
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Adds isEmpty to domain
r388 bool Domain::isEmpty() const
{
return spanX()==0 || spanY()==0;
}
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r439 void Domain::zoomIn(const QRectF& rect, const QSizeF& size)
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r131 {
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r439 qreal dx = spanX() / size.width();
qreal dy = spanY() / size.height();
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r131
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r439 m_maxX = m_minX + dx * rect.right();
m_minX = m_minX + dx * rect.left();
m_minY = m_maxY - dy * rect.bottom();
m_maxY = m_maxY - dy * rect.top();
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Changes public API for nice nuumbers -> setNiceNumbers(bool enabled)
r687 if(m_niceNumbers) {
looseNiceNumbers(m_minX, m_maxX, m_tickXCount);
looseNiceNumbers(m_minY, m_maxY, m_tickYCount);
}
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r678
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r439 emit domainChanged(m_minX, m_maxX, m_minY, m_maxY);
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r531 emit rangeXChanged(m_minX, m_maxX, m_tickXCount);
emit rangeYChanged(m_minY, m_maxY, m_tickYCount);
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r439 }
void Domain::zoomOut(const QRectF& rect, const QSizeF& size)
{
qreal dx = spanX() / rect.width();
qreal dy = spanY() / rect.height();
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r131
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r439 m_minX = m_maxX - dx * rect.right();
m_maxX = m_minX + dx * size.width();
m_maxY = m_minY + dy * rect.bottom();
m_minY = m_maxY - dy * size.height();
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r131
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Changes public API for nice nuumbers -> setNiceNumbers(bool enabled)
r687 if(m_niceNumbers) {
looseNiceNumbers(m_minX, m_maxX, m_tickXCount);
looseNiceNumbers(m_minY, m_maxY, m_tickYCount);
}
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r678
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r439 emit domainChanged(m_minX, m_maxX, m_minY, m_maxY);
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r531 emit rangeXChanged(m_minX, m_maxX, m_tickXCount);
emit rangeYChanged(m_minY, m_maxY, m_tickYCount);
}
void Domain::move(int dx,int dy,const QSizeF& size)
{
qreal x = spanX() / size.width();
qreal y = spanY() / size.height();
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r678 if(dx!=0) {
m_minX = m_minX + x * dx;
m_maxX = m_maxX + x * dx;
emit rangeXChanged(m_minX, m_maxX, m_tickXCount);
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r531 }
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r678 if(dy!=0) {
m_minY = m_minY + y * dy;
m_maxY = m_maxY + y * dy;
emit rangeYChanged(m_minY, m_maxY, m_tickYCount);
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r531 }
emit domainChanged(m_minX, m_maxX, m_minY, m_maxY);
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r439 }
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r687 void Domain::handleAxisXChanged(qreal min,qreal max,int tickXCount,bool niceNumbers)
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r678 {
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r687 m_niceNumbers=niceNumbers;
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r678 setRange(min,max,m_minY, m_maxY,tickXCount,m_tickYCount);
}
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r687 void Domain::handleAxisYChanged(qreal min,qreal max,int tickYCount,bool niceNumbers)
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r554 {
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r687 m_niceNumbers=niceNumbers;
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r678 setRange(m_minX, m_maxX, min, max,m_tickXCount,tickYCount);
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r554 }
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r678 //algorithm defined by Paul S.Heckbert GraphicalGems I
void Domain::looseNiceNumbers(qreal &min, qreal &max, int &ticksCount)
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r439 {
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r678 qreal range = niceNumber(max-min,true); //range with ceiling
qreal step = niceNumber(range/(ticksCount-1),false);
min = floor(min/step);
max = ceil(max/step);
ticksCount = int(max-min) +1;
min*=step;
max*=step;
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r554 }
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r678 //nice numbers can be expressed as form of 1*10^n, 2* 10^n or 5*10^n
qreal Domain::niceNumber(qreal x,bool ceiling)
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r554 {
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r678 qreal z = pow(10,floor(log10(x))); //find corresponding number of the form of 10^n than is smaller than x
qreal q = x/z;//q<10 && q>=1;
if(ceiling) {
if(q <= 1.0) q=1;
else if(q <= 2.0) q=2;
else if(q <= 5.0) q=5;
else q=10;
}
else {
if(q < 1.5) q=1;
else if(q < 3.0) q=2;
else if(q < 7.0) q=5;
else q=10;
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r554 }
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r678 return q*z;
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r131 }
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r220
bool operator== (const Domain &domain1, const Domain &domain2)
{
return (domain1.m_maxX == domain2.m_maxX &&
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r439 domain1.m_maxY == domain2.m_maxY &&
domain1.m_minX == domain2.m_minX &&
domain1.m_minY == domain2.m_minY);
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r220 }
bool operator!= (const Domain &domain1, const Domain &domain2)
{
return !(domain1 == domain2);
}
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Adds debug operator to domain
r222 QDebug operator<<(QDebug dbg, const Domain &domain)
{
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r679 dbg.nospace() << "Domain("<<domain.m_minX<<','<<domain.m_maxX<<','<<domain.m_minY<<','<<domain.m_maxY<<')' << domain.m_tickXCount << "," << domain.m_tickYCount ;
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r222 return dbg.maybeSpace();
}
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r439 #include "moc_domain_p.cpp"
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r131 QTCOMMERCIALCHART_END_NAMESPACE