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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd
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** All rights reserved.
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** For any questions to The Qt Company, please use contact form at http://qt.io
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**
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** This file is part of the Qt Charts module.
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**
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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** agreement between you and The Qt Company.
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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.io
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**
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****************************************************************************/
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#include <private/xlogydomain_p.h>
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#include <private/qabstractaxis_p.h>
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#include <QtCharts/QLogValueAxis>
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#include <QtCore/QtMath>
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#include <cmath>
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QT_CHARTS_BEGIN_NAMESPACE
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XLogYDomain::XLogYDomain(QObject *parent)
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: AbstractDomain(parent),
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m_logLeftY(0),
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m_logRightY(1),
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m_logBaseY(10)
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{
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}
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XLogYDomain::~XLogYDomain()
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{
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}
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void XLogYDomain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY)
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{
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bool axisXChanged = false;
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bool axisYChanged = false;
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adjustLogDomainRanges(minY, maxY);
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if (!qFuzzyIsNull(m_minX - minX) || !qFuzzyIsNull(m_maxX - maxX)) {
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m_minX = minX;
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m_maxX = maxX;
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axisXChanged = true;
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if(!m_signalsBlocked)
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emit rangeHorizontalChanged(m_minX, m_maxX);
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}
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if (!qFuzzyIsNull(m_minY - minY) || !qFuzzyIsNull(m_maxY - maxY)) {
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m_minY = minY;
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m_maxY = maxY;
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axisYChanged = true;
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qreal logMinY = std::log10(m_minY) / std::log10(m_logBaseY);
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qreal logMaxY = std::log10(m_maxY) / std::log10(m_logBaseY);
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m_logLeftY = logMinY < logMaxY ? logMinY : logMaxY;
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m_logRightY = logMinY > logMaxY ? logMinY : logMaxY;
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if (!m_signalsBlocked)
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emit rangeVerticalChanged(m_minY, m_maxY);
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}
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if (axisXChanged || axisYChanged)
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emit updated();
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}
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void XLogYDomain::zoomIn(const QRectF &rect)
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{
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storeZoomReset();
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qreal dx = spanX() / m_size.width();
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qreal maxX = m_maxX;
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qreal minX = m_minX;
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maxX = minX + dx * rect.right();
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minX = minX + dx * rect.left();
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qreal logLeftY = m_logRightY - rect.bottom() * (m_logRightY - m_logLeftY) / m_size.height();
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qreal logRightY = m_logRightY - rect.top() * (m_logRightY - m_logLeftY) / m_size.height();
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qreal leftY = qPow(m_logBaseY, logLeftY);
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qreal rightY = qPow(m_logBaseY, logRightY);
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qreal minY = leftY < rightY ? leftY : rightY;
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qreal maxY = leftY > rightY ? leftY : rightY;
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setRange(minX, maxX, minY, maxY);
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}
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void XLogYDomain::zoomOut(const QRectF &rect)
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{
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storeZoomReset();
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qreal dx = spanX() / rect.width();
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qreal maxX = m_maxX;
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qreal minX = m_minX;
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minX = maxX - dx * rect.right();
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maxX = minX + dx * m_size.width();
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const qreal factorY = m_size.height() / rect.height();
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qreal newLogMinY = m_logLeftY + (m_logRightY - m_logLeftY) / 2 * (1 - factorY);
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qreal newLogMaxY = m_logLeftY + (m_logRightY - m_logLeftY) / 2 * (1 + factorY);
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qreal leftY = qPow(m_logBaseY, newLogMinY);
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qreal rightY = qPow(m_logBaseY, newLogMaxY);
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qreal minY = leftY < rightY ? leftY : rightY;
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qreal maxY = leftY > rightY ? leftY : rightY;
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setRange(minX, maxX, minY, maxY);
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}
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void XLogYDomain::move(qreal dx, qreal dy)
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{
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qreal x = spanX() / m_size.width();
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qreal maxX = m_maxX;
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qreal minX = m_minX;
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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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qreal stepY = dy * (m_logRightY - m_logLeftY) / m_size.height();
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qreal leftY = qPow(m_logBaseY, m_logLeftY + stepY);
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qreal rightY = qPow(m_logBaseY, m_logRightY + stepY);
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qreal minY = leftY < rightY ? leftY : rightY;
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qreal maxY = leftY > rightY ? leftY : rightY;
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setRange(minX, maxX, minY, maxY);
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}
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QPointF XLogYDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const
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{
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const qreal deltaX = m_size.width() / (m_maxX - m_minX);
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const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY);
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qreal x = (point.x() - m_minX) * deltaX;
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qreal y(0);
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if (point.y() > 0) {
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y = (std::log10(point.y()) / std::log10(m_logBaseY)) * -deltaY - m_logLeftY * -deltaY + m_size.height();
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ok = true;
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} else {
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y = m_size.height();
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qWarning() << "Logarithms of zero and negative values are undefined.";
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ok = false;
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}
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return QPointF(x, y);
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}
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QVector<QPointF> XLogYDomain::calculateGeometryPoints(const QList<QPointF> &vector) const
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{
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const qreal deltaX = m_size.width() / (m_maxX - m_minX);
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const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY);
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QVector<QPointF> result;
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result.resize(vector.count());
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for (int i = 0; i < vector.count(); ++i) {
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if (vector[i].y() > 0) {
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qreal x = (vector[i].x() - m_minX) * deltaX;
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qreal y = (std::log10(vector[i].y()) / std::log10(m_logBaseY)) * -deltaY - m_logLeftY * -deltaY + m_size.height();
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result[i].setX(x);
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result[i].setY(y);
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} else {
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qWarning() << "Logarithms of zero and negative values are undefined.";
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return QVector<QPointF>();
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}
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}
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return result;
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}
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QPointF XLogYDomain::calculateDomainPoint(const QPointF &point) const
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{
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const qreal deltaX = m_size.width() / (m_maxX - m_minX);
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const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY);
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qreal x = point.x() / deltaX + m_minX;
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qreal y = qPow(m_logBaseY, m_logLeftY + (m_size.height() - point.y()) / deltaY);
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return QPointF(x, y);
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}
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bool XLogYDomain::attachAxis(QAbstractAxis *axis)
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{
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QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis);
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if (logAxis && logAxis->orientation() == Qt::Vertical) {
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QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal)));
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handleVerticalAxisBaseChanged(logAxis->base());
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}
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return AbstractDomain::attachAxis(axis);
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}
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bool XLogYDomain::detachAxis(QAbstractAxis *axis)
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{
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QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis);
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if (logAxis && logAxis->orientation() == Qt::Vertical)
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QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal)));
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return AbstractDomain::detachAxis(axis);
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}
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void XLogYDomain::handleVerticalAxisBaseChanged(qreal baseY)
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{
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m_logBaseY = baseY;
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qreal logMinY = std::log10(m_minY) / std::log10(m_logBaseY);
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qreal logMaxY = std::log10(m_maxY) / std::log10(m_logBaseY);
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m_logLeftY = logMinY < logMaxY ? logMinY : logMaxY;
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m_logRightY = logMinY > logMaxY ? logMinY : logMaxY;
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emit updated();
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}
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// operators
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bool QT_CHARTS_AUTOTEST_EXPORT operator== (const XLogYDomain &domain1, const XLogYDomain &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 QT_CHARTS_AUTOTEST_EXPORT operator!= (const XLogYDomain &domain1, const XLogYDomain &domain2)
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{
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return !(domain1 == domain2);
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}
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QDebug QT_CHARTS_AUTOTEST_EXPORT operator<<(QDebug dbg, const XLogYDomain &domain)
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{
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#ifdef QT_NO_TEXTSTREAM
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Q_UNUSED(domain)
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#else
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dbg.nospace() << "AbstractDomain(" << domain.m_minX << ',' << domain.m_maxX << ',' << domain.m_minY << ',' << domain.m_maxY << ')' << domain.m_size;
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#endif
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return dbg.maybeSpace();
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}
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#include "moc_xlogydomain_p.cpp"
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QT_CHARTS_END_NAMESPACE
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