xlogydomain.cpp
251 lines
| 8.2 KiB
| text/x-c
|
CppLexer
|
r2854 | /**************************************************************************** | ||
|
r2275 | ** | ||
|
r2854 | ** Copyright (C) 2016 The Qt Company Ltd. | ||
** Contact: https://www.qt.io/licensing/ | ||||
|
r2275 | ** | ||
|
r2854 | ** This file is part of the Qt Charts module of the Qt Toolkit. | ||
|
r2275 | ** | ||
|
r2854 | ** $QT_BEGIN_LICENSE:GPL$ | ||
|
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 | ||||
|
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. | ||||
|
r2275 | ** | ||
|
r2845 | ** $QT_END_LICENSE$ | ||
** | ||||
|
r2854 | ****************************************************************************/ | ||
|
r2275 | |||
|
r2714 | #include <private/xlogydomain_p.h> | ||
#include <private/qabstractaxis_p.h> | ||||
#include <QtCharts/QLogValueAxis> | ||||
#include <QtCore/QtMath> | ||||
|
r2775 | #include <cmath> | ||
|
r2275 | |||
|
r2712 | QT_CHARTS_BEGIN_NAMESPACE | ||
|
r2275 | |||
XLogYDomain::XLogYDomain(QObject *parent) | ||||
: AbstractDomain(parent), | ||||
|
r2351 | m_logLeftY(0), | ||
m_logRightY(1), | ||||
|
r2275 | m_logBaseY(10) | ||
{ | ||||
} | ||||
XLogYDomain::~XLogYDomain() | ||||
{ | ||||
} | ||||
void XLogYDomain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY) | ||||
{ | ||||
bool axisXChanged = false; | ||||
bool axisYChanged = false; | ||||
|
r2483 | adjustLogDomainRanges(minY, maxY); | ||
|
r2275 | if (!qFuzzyIsNull(m_minX - minX) || !qFuzzyIsNull(m_maxX - maxX)) { | ||
m_minX = minX; | ||||
m_maxX = maxX; | ||||
axisXChanged = true; | ||||
|
r2288 | if(!m_signalsBlocked) | ||
|
r2356 | emit rangeHorizontalChanged(m_minX, m_maxX); | ||
|
r2275 | } | ||
if (!qFuzzyIsNull(m_minY - minY) || !qFuzzyIsNull(m_maxY - maxY)) { | ||||
m_minY = minY; | ||||
m_maxY = maxY; | ||||
axisYChanged = true; | ||||
|
r2775 | qreal logMinY = std::log10(m_minY) / std::log10(m_logBaseY); | ||
qreal logMaxY = std::log10(m_maxY) / std::log10(m_logBaseY); | ||||
|
r2351 | m_logLeftY = logMinY < logMaxY ? logMinY : logMaxY; | ||
m_logRightY = logMinY > logMaxY ? logMinY : logMaxY; | ||||
|
r2483 | if (!m_signalsBlocked) | ||
|
r2356 | emit rangeVerticalChanged(m_minY, m_maxY); | ||
|
r2275 | } | ||
if (axisXChanged || axisYChanged) | ||||
emit updated(); | ||||
} | ||||
void XLogYDomain::zoomIn(const QRectF &rect) | ||||
{ | ||||
|
r2545 | storeZoomReset(); | ||
|
r2275 | qreal dx = spanX() / m_size.width(); | ||
qreal maxX = m_maxX; | ||||
qreal minX = m_minX; | ||||
maxX = minX + dx * rect.right(); | ||||
minX = minX + dx * rect.left(); | ||||
|
r2280 | |||
|
r2351 | qreal logLeftY = m_logRightY - rect.bottom() * (m_logRightY - m_logLeftY) / m_size.height(); | ||
qreal logRightY = m_logRightY - rect.top() * (m_logRightY - m_logLeftY) / m_size.height(); | ||||
qreal leftY = qPow(m_logBaseY, logLeftY); | ||||
qreal rightY = qPow(m_logBaseY, logRightY); | ||||
qreal minY = leftY < rightY ? leftY : rightY; | ||||
qreal maxY = leftY > rightY ? leftY : rightY; | ||||
|
r2275 | |||
setRange(minX, maxX, minY, maxY); | ||||
} | ||||
void XLogYDomain::zoomOut(const QRectF &rect) | ||||
{ | ||||
|
r2545 | storeZoomReset(); | ||
|
r2275 | qreal dx = spanX() / rect.width(); | ||
qreal maxX = m_maxX; | ||||
qreal minX = m_minX; | ||||
minX = maxX - dx * rect.right(); | ||||
maxX = minX + dx * m_size.width(); | ||||
|
r2280 | |||
|
r2351 | const qreal factorY = m_size.height() / rect.height(); | ||
qreal newLogMinY = m_logLeftY + (m_logRightY - m_logLeftY) / 2 * (1 - factorY); | ||||
qreal newLogMaxY = m_logLeftY + (m_logRightY - m_logLeftY) / 2 * (1 + factorY); | ||||
qreal leftY = qPow(m_logBaseY, newLogMinY); | ||||
qreal rightY = qPow(m_logBaseY, newLogMaxY); | ||||
qreal minY = leftY < rightY ? leftY : rightY; | ||||
qreal maxY = leftY > rightY ? leftY : rightY; | ||||
|
r2275 | |||
setRange(minX, maxX, minY, maxY); | ||||
} | ||||
void XLogYDomain::move(qreal dx, qreal dy) | ||||
{ | ||||
qreal x = spanX() / m_size.width(); | ||||
qreal maxX = m_maxX; | ||||
qreal minX = m_minX; | ||||
if (dx != 0) { | ||||
minX = minX + x * dx; | ||||
maxX = maxX + x * dx; | ||||
} | ||||
|
r2280 | |||
|
r2351 | qreal stepY = dy * (m_logRightY - m_logLeftY) / m_size.height(); | ||
qreal leftY = qPow(m_logBaseY, m_logLeftY + stepY); | ||||
qreal rightY = qPow(m_logBaseY, m_logRightY + stepY); | ||||
qreal minY = leftY < rightY ? leftY : rightY; | ||||
qreal maxY = leftY > rightY ? leftY : rightY; | ||||
|
r2280 | |||
|
r2275 | setRange(minX, maxX, minY, maxY); | ||
} | ||||
|
r2356 | QPointF XLogYDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const | ||
|
r2275 | { | ||
|
r2611 | const qreal deltaX = m_size.width() / (m_maxX - m_minX); | ||
const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY); | ||||
|
r2356 | |||
|
r2611 | qreal x = (point.x() - m_minX) * deltaX; | ||
qreal y(0); | ||||
if (point.y() > 0) { | ||||
|
r2775 | y = (std::log10(point.y()) / std::log10(m_logBaseY)) * -deltaY - m_logLeftY * -deltaY + m_size.height(); | ||
|
r2356 | ok = true; | ||
} else { | ||||
|
r2611 | y = m_size.height(); | ||
qWarning() << "Logarithms of zero and negative values are undefined."; | ||||
|
r2356 | ok = false; | ||
} | ||||
|
r2611 | return QPointF(x, y); | ||
|
r2275 | } | ||
|
r2820 | QVector<QPointF> XLogYDomain::calculateGeometryPoints(const QVector<QPointF> &vector) const | ||
|
r2275 | { | ||
const qreal deltaX = m_size.width() / (m_maxX - m_minX); | ||||
|
r2351 | const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY); | ||
|
r2275 | |||
QVector<QPointF> result; | ||||
result.resize(vector.count()); | ||||
for (int i = 0; i < vector.count(); ++i) { | ||||
|
r2356 | if (vector[i].y() > 0) { | ||
qreal x = (vector[i].x() - m_minX) * deltaX; | ||||
|
r2775 | qreal y = (std::log10(vector[i].y()) / std::log10(m_logBaseY)) * -deltaY - m_logLeftY * -deltaY + m_size.height(); | ||
|
r2356 | result[i].setX(x); | ||
result[i].setY(y); | ||||
} else { | ||||
|
r2611 | qWarning() << "Logarithms of zero and negative values are undefined."; | ||
|
r2356 | return QVector<QPointF>(); | ||
} | ||||
|
r2275 | } | ||
return result; | ||||
} | ||||
QPointF XLogYDomain::calculateDomainPoint(const QPointF &point) const | ||||
{ | ||||
const qreal deltaX = m_size.width() / (m_maxX - m_minX); | ||||
|
r2351 | const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY); | ||
|
r2275 | qreal x = point.x() / deltaX + m_minX; | ||
|
r2351 | qreal y = qPow(m_logBaseY, m_logLeftY + (m_size.height() - point.y()) / deltaY); | ||
|
r2275 | return QPointF(x, y); | ||
} | ||||
|
r2483 | bool XLogYDomain::attachAxis(QAbstractAxis *axis) | ||
|
r2290 | { | ||
QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); | ||||
|
r2483 | if (logAxis && logAxis->orientation() == Qt::Vertical) { | ||
|
r2290 | QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal))); | ||
|
r2295 | handleVerticalAxisBaseChanged(logAxis->base()); | ||
|
r2356 | } | ||
|
r2292 | return AbstractDomain::attachAxis(axis); | ||
|
r2290 | } | ||
|
r2483 | bool XLogYDomain::detachAxis(QAbstractAxis *axis) | ||
|
r2290 | { | ||
QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); | ||||
|
r2483 | if (logAxis && logAxis->orientation() == Qt::Vertical) | ||
|
r2290 | QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal))); | ||
|
r2292 | return AbstractDomain::detachAxis(axis); | ||
|
r2290 | } | ||
void XLogYDomain::handleVerticalAxisBaseChanged(qreal baseY) | ||||
{ | ||||
m_logBaseY = baseY; | ||||
|
r2775 | qreal logMinY = std::log10(m_minY) / std::log10(m_logBaseY); | ||
qreal logMaxY = std::log10(m_maxY) / std::log10(m_logBaseY); | ||||
|
r2351 | m_logLeftY = logMinY < logMaxY ? logMinY : logMaxY; | ||
m_logRightY = logMinY > logMaxY ? logMinY : logMaxY; | ||||
|
r2322 | emit updated(); | ||
|
r2290 | } | ||
|
r2275 | // operators | ||
|
r2712 | bool QT_CHARTS_AUTOTEST_EXPORT operator== (const XLogYDomain &domain1, const XLogYDomain &domain2) | ||
|
r2275 | { | ||
|
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)); | ||||
|
r2275 | } | ||
|
r2712 | bool QT_CHARTS_AUTOTEST_EXPORT operator!= (const XLogYDomain &domain1, const XLogYDomain &domain2) | ||
|
r2275 | { | ||
return !(domain1 == domain2); | ||||
} | ||||
|
r2712 | QDebug QT_CHARTS_AUTOTEST_EXPORT operator<<(QDebug dbg, const XLogYDomain &domain) | ||
|
r2275 | { | ||
|
r2620 | #ifdef QT_NO_TEXTSTREAM | ||
Q_UNUSED(domain) | ||||
#else | ||||
|
r2275 | dbg.nospace() << "AbstractDomain(" << domain.m_minX << ',' << domain.m_maxX << ',' << domain.m_minY << ',' << domain.m_maxY << ')' << domain.m_size; | ||
|
r2620 | #endif | ||
|
r2275 | return dbg.maybeSpace(); | ||
} | ||||
#include "moc_xlogydomain_p.cpp" | ||||
|
r2712 | QT_CHARTS_END_NAMESPACE | ||