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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 "xlogydomain_p.h"
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#include "qabstractaxis_p.h"
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#include "qlogvalueaxis.h"
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#include <qmath.h>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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XLogYDomain::XLogYDomain(QObject *parent)
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: AbstractDomain(parent),
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m_logMinY(0),
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m_logMaxY(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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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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m_logMinY = log10(m_minY) / log10(m_logBaseY);
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m_logMaxY = log10(m_maxY) / log10(m_logBaseY);
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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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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 newLogMinY = m_logMaxY - rect.bottom() * (m_logMaxY - m_logMinY) / m_size.height();
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qreal newLogMaxY = m_logMaxY - rect.top() * (m_logMaxY - m_logMinY) / m_size.height();
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qreal minY = qPow(m_logBaseY, newLogMinY);
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qreal maxY = qPow(m_logBaseY, newLogMaxY);
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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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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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qreal ratioY = m_size.height()/rect.height();
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qreal newLogMinY = m_logMinY - (m_logMaxY - m_logMinY) / ratioY;
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qreal newLogMaxY = m_logMaxY + (m_logMaxY - m_logMinY) / ratioY;
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qreal minY = qPow(m_logBaseY, newLogMinY);
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qreal maxY = qPow(m_logBaseY, newLogMaxY);
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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 * qAbs(m_logMaxY - m_logMinY) / m_size.height();
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qreal minY = qPow(m_logBaseY, m_logMinY + stepY);
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qreal maxY = qPow(m_logBaseY, m_logMaxY + stepY);
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setRange(minX, maxX, minY, maxY);
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}
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QPointF XLogYDomain::calculateGeometryPoint(const QPointF &point) const
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{
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const qreal leftEdge = m_logMinY < m_logMaxY ? m_logMinY : m_logMaxY;
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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_logMaxY - m_logMinY);
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qreal x = (point.x() - m_minX) * deltaX;
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qreal y = (log10(point.y()) / log10(m_logBaseY)) * -deltaY - leftEdge * -deltaY + m_size.height();
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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 leftEdge = m_logMinY < m_logMaxY ? m_logMinY : m_logMaxY;
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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_logMaxY - m_logMinY);
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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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qreal x = (vector[i].x() - m_minX) * deltaX;
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qreal y = (log10(vector[i].y()) / log10(m_logBaseY)) * -deltaY - leftEdge * -deltaY + m_size.height();
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result[i].setX(x);
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result[i].setY(y);
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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 leftEdgeY = m_logMinY < m_logMaxY ? m_logMinY : m_logMaxY;
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const qreal deltaY = m_size.height() / qAbs(m_logMaxY - m_logMinY);
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qreal x = point.x() / deltaX + m_minX;
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qreal y = qPow(m_logBaseY, leftEdgeY + (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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m_logMinY = log10(m_minY) / log10(m_logBaseY);
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m_logMaxY = log10(m_maxY) / log10(m_logBaseY);
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}
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// operators
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bool QTCOMMERCIALCHART_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 QTCOMMERCIALCHART_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 QTCOMMERCIALCHART_AUTOTEST_EXPORT operator<<(QDebug dbg, const XLogYDomain &domain)
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{
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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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return dbg.maybeSpace();
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}
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#include "moc_xlogydomain_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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