domain.cpp
257 lines
| 6.1 KiB
| text/x-c
|
CppLexer
/ src / domain.cpp
Michal Klocek
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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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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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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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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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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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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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Michal Klocek
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r131 | QTCOMMERCIALCHART_END_NAMESPACE | ||