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