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/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.digia.com
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**
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** This file is part of the Qt Commercial Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.digia.com
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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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_niceXNumbers(false),
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m_niceYNumbers(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 axisXChanged = false;
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bool axisYChanged = false;
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if(m_tickXCount!=tickXCount) {
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m_tickXCount=tickXCount;
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axisXChanged=true;
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}
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if(m_tickYCount!=tickYCount) {
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m_tickYCount=tickYCount;
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axisYChanged=true;
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}
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if (!qFuzzyIsNull(m_minX - minX) || !qFuzzyIsNull(m_maxX - maxX)) {
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if(m_niceXNumbers) looseNiceNumbers(minX, maxX, m_tickXCount);
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m_minX=minX;
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m_maxX=maxX;
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axisXChanged=true;
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}
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if (!qFuzzyIsNull(m_minY - minY) || !qFuzzyIsNull(m_maxY - maxY)) {
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if(m_niceYNumbers) looseNiceNumbers(minY, maxY, m_tickYCount);
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m_minY=minY;
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m_maxY=maxY;
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axisYChanged=true;
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}
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if(axisXChanged || axisYChanged) {
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emit this->domainChanged(m_minX, m_maxX, m_minY, m_maxY);
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}
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if(axisXChanged) {
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emit rangeXChanged(minX,maxX, m_tickXCount);
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}
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if(axisYChanged) {
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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 qFuzzyIsNull(spanX()) || qFuzzyIsNull(spanY());
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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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qreal maxX = m_maxX;
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qreal minX = m_minX;
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qreal minY = m_minY;
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qreal maxY = m_maxY;
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maxX = minX + dx * rect.right();
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minX = minX + dx * rect.left();
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minY = maxY - dy * rect.bottom();
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maxY = maxY - dy * rect.top();
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int tickXCount = m_tickXCount;
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int tickYCount = m_tickYCount;
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if(m_niceXNumbers) {
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looseNiceNumbers(minX, maxX, tickXCount);
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}
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if(m_niceYNumbers) {
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looseNiceNumbers(minY, maxY, tickYCount);
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}
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setRange(minX,maxX,minY,maxY,tickXCount,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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qreal maxX = m_maxX;
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qreal minX = m_minX;
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qreal minY = m_minY;
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qreal maxY = m_maxY;
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minX = maxX - dx * rect.right();
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maxX = minX + dx * size.width();
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maxY = minY + dy * rect.bottom();
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minY = maxY - dy * size.height();
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int tickXCount = m_tickXCount;
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int tickYCount = m_tickYCount;
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if(m_niceXNumbers) {
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looseNiceNumbers(minX, maxX, tickXCount);
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}
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if(m_niceYNumbers) {
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looseNiceNumbers(minY, maxY, tickYCount);
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}
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setRange(minX,maxX,minY,maxY,tickXCount,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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qreal maxX = m_maxX;
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qreal minX = m_minX;
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qreal minY = m_minY;
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qreal maxY = m_maxY;
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if(dx!=0) {
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minX = minX + x * dx;
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maxX = maxX + x * dx;
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}
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if(dy!=0) {
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minY = minY + y * dy;
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maxY = maxY + y * dy;
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}
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setRange(minX,maxX,minY,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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if (m_niceXNumbers != niceNumbers) {
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m_niceXNumbers = niceNumbers;
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//force recalculation
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m_minX = 0;
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m_maxX = 0;
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}
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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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if (m_niceYNumbers != niceNumbers) {
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m_niceYNumbers = niceNumbers;
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//force recalculation
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m_minY = 0;
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m_maxY = 0;
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}
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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) const
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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) const
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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 QTCOMMERCIALCHART_AUTOTEST_EXPORT operator== (const Domain &domain1, const Domain &domain2)
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{
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return (qFuzzyIsNull(domain1.m_maxX - domain2.m_maxX) &&
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qFuzzyIsNull(domain1.m_maxY - domain2.m_maxY) &&
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qFuzzyIsNull(domain1.m_minX - domain2.m_minX) &&
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qFuzzyIsNull(domain1.m_minY - domain2.m_minY));
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}
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bool QTCOMMERCIALCHART_AUTOTEST_EXPORT 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 QTCOMMERCIALCHART_AUTOTEST_EXPORT 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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