logxydomain.cpp
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| text/x-c
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CppLexer
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r2854 | /**************************************************************************** | ||
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r2275 | ** | ||
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r2854 | ** Copyright (C) 2016 The Qt Company Ltd. | ||
** Contact: https://www.qt.io/licensing/ | ||||
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r2275 | ** | ||
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r2854 | ** This file is part of the Qt Charts module of the Qt Toolkit. | ||
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r2275 | ** | ||
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r2854 | ** $QT_BEGIN_LICENSE:GPL$ | ||
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r2845 | ** Commercial License Usage | ||
** Licensees holding valid commercial Qt licenses may use this file in | ||||
** accordance with the commercial license agreement provided with the | ||||
** Software or, alternatively, in accordance with the terms contained in | ||||
** a written agreement between you and The Qt Company. For licensing terms | ||||
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r2854 | ** and conditions see https://www.qt.io/terms-conditions. For further | ||
** information use the contact form at https://www.qt.io/contact-us. | ||||
** | ||||
** GNU General Public License Usage | ||||
** Alternatively, this file may be used under the terms of the GNU | ||||
** General Public License version 3 or (at your option) any later version | ||||
** approved by the KDE Free Qt Foundation. The licenses are as published by | ||||
** the Free Software Foundation and appearing in the file LICENSE.GPL3 | ||||
** included in the packaging of this file. Please review the following | ||||
** information to ensure the GNU General Public License requirements will | ||||
** be met: https://www.gnu.org/licenses/gpl-3.0.html. | ||||
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r2275 | ** | ||
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r2845 | ** $QT_END_LICENSE$ | ||
** | ||||
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r2854 | ****************************************************************************/ | ||
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r2275 | |||
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r2714 | #include <private/logxydomain_p.h> | ||
#include <private/qabstractaxis_p.h> | ||||
#include <QtCharts/QLogValueAxis> | ||||
#include <QtCore/QtMath> | ||||
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r2775 | #include <cmath> | ||
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r2275 | |||
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r2712 | QT_CHARTS_BEGIN_NAMESPACE | ||
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r2275 | |||
LogXYDomain::LogXYDomain(QObject *parent) | ||||
: AbstractDomain(parent), | ||||
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r2351 | m_logLeftX(0), | ||
m_logRightX(1), | ||||
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r2275 | m_logBaseX(10) | ||
{ | ||||
} | ||||
LogXYDomain::~LogXYDomain() | ||||
{ | ||||
} | ||||
void LogXYDomain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY) | ||||
{ | ||||
bool axisXChanged = false; | ||||
bool axisYChanged = false; | ||||
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r2483 | adjustLogDomainRanges(minX, maxX); | ||
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r2275 | if (!qFuzzyCompare(m_minX, minX) || !qFuzzyCompare(m_maxX, maxX)) { | ||
m_minX = minX; | ||||
m_maxX = maxX; | ||||
axisXChanged = true; | ||||
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r2775 | qreal logMinX = std::log10(m_minX) / std::log10(m_logBaseX); | ||
qreal logMaxX = std::log10(m_maxX) / std::log10(m_logBaseX); | ||||
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r2351 | m_logLeftX = logMinX < logMaxX ? logMinX : logMaxX; | ||
m_logRightX = logMinX > logMaxX ? logMinX : logMaxX; | ||||
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r2288 | if(!m_signalsBlocked) | ||
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r2356 | emit rangeHorizontalChanged(m_minX, m_maxX); | ||
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r2275 | } | ||
if (!qFuzzyIsNull(m_minY - minY) || !qFuzzyIsNull(m_maxY - maxY)) { | ||||
m_minY = minY; | ||||
m_maxY = maxY; | ||||
axisYChanged = true; | ||||
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r2483 | if (!m_signalsBlocked) | ||
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r2356 | emit rangeVerticalChanged(m_minY, m_maxY); | ||
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r2275 | } | ||
if (axisXChanged || axisYChanged) | ||||
emit updated(); | ||||
} | ||||
void LogXYDomain::zoomIn(const QRectF &rect) | ||||
{ | ||||
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r2545 | storeZoomReset(); | ||
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r2351 | qreal logLeftX = rect.left() * (m_logRightX - m_logLeftX) / m_size.width() + m_logLeftX; | ||
qreal logRightX = rect.right() * (m_logRightX - m_logLeftX) / m_size.width() + m_logLeftX; | ||||
qreal leftX = qPow(m_logBaseX, logLeftX); | ||||
qreal rightX = qPow(m_logBaseX, logRightX); | ||||
qreal minX = leftX < rightX ? leftX : rightX; | ||||
qreal maxX = leftX > rightX ? leftX : rightX; | ||||
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r2275 | |||
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r2280 | qreal dy = spanY() / m_size.height(); | ||
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r2275 | qreal minY = m_minY; | ||
qreal maxY = m_maxY; | ||||
minY = maxY - dy * rect.bottom(); | ||||
maxY = maxY - dy * rect.top(); | ||||
setRange(minX, maxX, minY, maxY); | ||||
} | ||||
void LogXYDomain::zoomOut(const QRectF &rect) | ||||
{ | ||||
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r2545 | storeZoomReset(); | ||
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r2351 | const qreal factorX = m_size.width() / rect.width(); | ||
qreal logLeftX = m_logLeftX + (m_logRightX - m_logLeftX) / 2 * (1 - factorX); | ||||
qreal logRIghtX = m_logLeftX + (m_logRightX - m_logLeftX) / 2 * (1 + factorX); | ||||
qreal leftX = qPow(m_logBaseX, logLeftX); | ||||
qreal rightX = qPow(m_logBaseX, logRIghtX); | ||||
qreal minX = leftX < rightX ? leftX : rightX; | ||||
qreal maxX = leftX > rightX ? leftX : rightX; | ||||
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r2275 | |||
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r2280 | qreal dy = spanY() / rect.height(); | ||
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r2275 | qreal minY = m_minY; | ||
qreal maxY = m_maxY; | ||||
maxY = minY + dy * rect.bottom(); | ||||
minY = maxY - dy * m_size.height(); | ||||
setRange(minX, maxX, minY, maxY); | ||||
} | ||||
void LogXYDomain::move(qreal dx, qreal dy) | ||||
{ | ||||
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r2351 | qreal stepX = dx * (m_logRightX - m_logLeftX) / m_size.width(); | ||
qreal leftX = qPow(m_logBaseX, m_logLeftX + stepX); | ||||
qreal rightX = qPow(m_logBaseX, m_logRightX + stepX); | ||||
qreal minX = leftX < rightX ? leftX : rightX; | ||||
qreal maxX = leftX > rightX ? leftX : rightX; | ||||
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r2275 | |||
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r2280 | qreal y = spanY() / m_size.height(); | ||
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r2275 | qreal minY = m_minY; | ||
qreal maxY = m_maxY; | ||||
if (dy != 0) { | ||||
minY = minY + y * dy; | ||||
maxY = maxY + y * dy; | ||||
} | ||||
setRange(minX, maxX, minY, maxY); | ||||
} | ||||
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r2356 | QPointF LogXYDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const | ||
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r2275 | { | ||
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r2611 | const qreal deltaX = m_size.width() / (m_logRightX - m_logLeftX); | ||
const qreal deltaY = m_size.height() / (m_maxY - m_minY); | ||||
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r2275 | |||
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r2611 | qreal x(0); | ||
qreal y = (point.y() - m_minY) * -deltaY + m_size.height(); | ||||
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r2356 | if (point.x() > 0) { | ||
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r2775 | x = (std::log10(point.x()) / std::log10(m_logBaseX)) * deltaX - m_logLeftX * deltaX; | ||
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r2356 | ok = true; | ||
} else { | ||||
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r2611 | x = 0; | ||
qWarning() << "Logarithms of zero and negative values are undefined."; | ||||
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r2356 | ok = false; | ||
} | ||||
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r2611 | return QPointF(x, y); | ||
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r2275 | } | ||
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r2820 | QVector<QPointF> LogXYDomain::calculateGeometryPoints(const QVector<QPointF> &vector) const | ||
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r2275 | { | ||
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r2351 | const qreal deltaX = m_size.width() / (m_logRightX - m_logLeftX); | ||
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r2275 | const qreal deltaY = m_size.height() / (m_maxY - m_minY); | ||
QVector<QPointF> result; | ||||
result.resize(vector.count()); | ||||
for (int i = 0; i < vector.count(); ++i) { | ||||
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r2356 | if (vector[i].x() > 0) { | ||
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r2775 | qreal x = (std::log10(vector[i].x()) / std::log10(m_logBaseX)) * deltaX - m_logLeftX * deltaX; | ||
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r2356 | qreal y = (vector[i].y() - m_minY) * -deltaY + m_size.height(); | ||
result[i].setX(x); | ||||
result[i].setY(y); | ||||
} else { | ||||
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r2611 | qWarning() << "Logarithms of zero and negative values are undefined."; | ||
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r2356 | return QVector<QPointF>(); | ||
} | ||||
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r2611 | |||
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r2275 | } | ||
return result; | ||||
} | ||||
QPointF LogXYDomain::calculateDomainPoint(const QPointF &point) const | ||||
{ | ||||
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r2351 | const qreal deltaX = m_size.width() / (m_logRightX - m_logLeftX); | ||
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r2275 | const qreal deltaY = m_size.height() / (m_maxY - m_minY); | ||
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r2351 | qreal x = qPow(m_logBaseX, m_logLeftX + point.x() / deltaX); | ||
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r2275 | qreal y = (point.y() - m_size.height()) / (-deltaY) + m_minY; | ||
return QPointF(x, y); | ||||
} | ||||
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r2483 | bool LogXYDomain::attachAxis(QAbstractAxis *axis) | ||
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r2290 | { | ||
AbstractDomain::attachAxis(axis); | ||||
QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); | ||||
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r2483 | if (logAxis && logAxis->orientation() == Qt::Horizontal) { | ||
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r2290 | QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal))); | ||
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r2295 | handleHorizontalAxisBaseChanged(logAxis->base()); | ||
} | ||||
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r2290 | |||
return true; | ||||
} | ||||
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r2483 | bool LogXYDomain::detachAxis(QAbstractAxis *axis) | ||
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r2290 | { | ||
AbstractDomain::detachAxis(axis); | ||||
QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); | ||||
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r2483 | if (logAxis && logAxis->orientation() == Qt::Horizontal) | ||
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r2290 | QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal))); | ||
return true; | ||||
} | ||||
void LogXYDomain::handleHorizontalAxisBaseChanged(qreal baseX) | ||||
{ | ||||
m_logBaseX = baseX; | ||||
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r2775 | qreal logMinX = std::log10(m_minX) / std::log10(m_logBaseX); | ||
qreal logMaxX = std::log10(m_maxX) / std::log10(m_logBaseX); | ||||
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r2351 | m_logLeftX = logMinX < logMaxX ? logMinX : logMaxX; | ||
m_logRightX = logMinX > logMaxX ? logMinX : logMaxX; | ||||
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r2322 | emit updated(); | ||
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r2290 | } | ||
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r2275 | // operators | ||
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r2855 | bool Q_AUTOTEST_EXPORT operator== (const LogXYDomain &domain1, const LogXYDomain &domain2) | ||
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r2275 | { | ||
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r2483 | return (qFuzzyIsNull(domain1.m_maxX - domain2.m_maxX) | ||
&& qFuzzyIsNull(domain1.m_maxY - domain2.m_maxY) | ||||
&& qFuzzyIsNull(domain1.m_minX - domain2.m_minX) | ||||
&& qFuzzyIsNull(domain1.m_minY - domain2.m_minY)); | ||||
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r2275 | } | ||
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r2855 | bool Q_AUTOTEST_EXPORT operator!= (const LogXYDomain &domain1, const LogXYDomain &domain2) | ||
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r2275 | { | ||
return !(domain1 == domain2); | ||||
} | ||||
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r2855 | QDebug Q_AUTOTEST_EXPORT operator<<(QDebug dbg, const LogXYDomain &domain) | ||
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r2275 | { | ||
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r2620 | #ifdef QT_NO_TEXTSTREAM | ||
Q_UNUSED(domain) | ||||
#else | ||||
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r2275 | dbg.nospace() << "AbstractDomain(" << domain.m_minX << ',' << domain.m_maxX << ',' << domain.m_minY << ',' << domain.m_maxY << ')' << domain.m_size; | ||
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r2620 | #endif | ||
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r2275 | return dbg.maybeSpace(); | ||
} | ||||
#include "moc_logxydomain_p.cpp" | ||||
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r2712 | QT_CHARTS_END_NAMESPACE | ||