xlogydomain.cpp
240 lines
| 7.6 KiB
| text/x-c
|
CppLexer
Marek Rosa
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r2275 | /**************************************************************************** | ||
| ** | ||||
Titta Heikkala
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r2776 | ** Copyright (C) 2015 The Qt Company Ltd | ||
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Marek Rosa
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r2275 | ** All rights reserved. | ||
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Titta Heikkala
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r2776 | ** For any questions to The Qt Company, please use contact form at http://qt.io | ||
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Marek Rosa
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r2275 | ** | ||
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Titta Heikkala
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r2740 | ** This file is part of the Qt Charts module. | ||
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Marek Rosa
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r2275 | ** | ||
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r2740 | ** Licensees holding valid commercial license for Qt may use this file in | ||
| ** accordance with the Qt License Agreement provided with the Software | ||||
| ** or, alternatively, in accordance with the terms contained in a written | ||||
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Titta Heikkala
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r2776 | ** agreement between you and The Qt Company. | ||
|
Marek Rosa
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r2275 | ** | ||
| ** If you have questions regarding the use of this file, please use | ||||
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Titta Heikkala
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r2740 | ** contact form at http://qt.io | ||
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Marek Rosa
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r2275 | ** | ||
| ****************************************************************************/ | ||||
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Titta Heikkala
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r2714 | #include <private/xlogydomain_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 | |||
| XLogYDomain::XLogYDomain(QObject *parent) | ||||
| : AbstractDomain(parent), | ||||
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r2351 | m_logLeftY(0), | ||
| m_logRightY(1), | ||||
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r2275 | m_logBaseY(10) | ||
| { | ||||
| } | ||||
| XLogYDomain::~XLogYDomain() | ||||
| { | ||||
| } | ||||
| void XLogYDomain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY) | ||||
| { | ||||
| bool axisXChanged = false; | ||||
| bool axisYChanged = false; | ||||
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r2483 | adjustLogDomainRanges(minY, maxY); | ||
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r2275 | if (!qFuzzyIsNull(m_minX - minX) || !qFuzzyIsNull(m_maxX - maxX)) { | ||
| m_minX = minX; | ||||
| m_maxX = maxX; | ||||
| axisXChanged = true; | ||||
Michal Klocek
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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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r2775 | qreal logMinY = std::log10(m_minY) / std::log10(m_logBaseY); | ||
| qreal logMaxY = std::log10(m_maxY) / std::log10(m_logBaseY); | ||||
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r2351 | m_logLeftY = logMinY < logMaxY ? logMinY : logMaxY; | ||
| m_logRightY = logMinY > logMaxY ? logMinY : logMaxY; | ||||
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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 XLogYDomain::zoomIn(const QRectF &rect) | ||||
| { | ||||
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r2545 | storeZoomReset(); | ||
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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(); | ||||
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r2280 | |||
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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; | ||||
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r2275 | |||
| setRange(minX, maxX, minY, maxY); | ||||
| } | ||||
| void XLogYDomain::zoomOut(const QRectF &rect) | ||||
| { | ||||
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r2545 | storeZoomReset(); | ||
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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(); | ||||
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r2280 | |||
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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; | ||||
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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; | ||||
| } | ||||
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r2280 | |||
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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; | ||||
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r2280 | |||
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r2275 | setRange(minX, maxX, minY, maxY); | ||
| } | ||||
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r2356 | QPointF XLogYDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const | ||
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r2275 | { | ||
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r2611 | const qreal deltaX = m_size.width() / (m_maxX - m_minX); | ||
| const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY); | ||||
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r2356 | |||
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r2611 | qreal x = (point.x() - m_minX) * deltaX; | ||
| qreal y(0); | ||||
| if (point.y() > 0) { | ||||
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r2775 | y = (std::log10(point.y()) / std::log10(m_logBaseY)) * -deltaY - m_logLeftY * -deltaY + m_size.height(); | ||
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r2356 | ok = true; | ||
| } else { | ||||
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r2611 | y = m_size.height(); | ||
| 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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r2483 | QVector<QPointF> XLogYDomain::calculateGeometryPoints(const QList<QPointF> &vector) const | ||
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r2275 | { | ||
| const qreal deltaX = m_size.width() / (m_maxX - m_minX); | ||||
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r2351 | const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY); | ||
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r2275 | |||
| QVector<QPointF> result; | ||||
| result.resize(vector.count()); | ||||
| for (int i = 0; i < vector.count(); ++i) { | ||||
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r2356 | if (vector[i].y() > 0) { | ||
| qreal x = (vector[i].x() - m_minX) * deltaX; | ||||
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r2775 | qreal y = (std::log10(vector[i].y()) / std::log10(m_logBaseY)) * -deltaY - m_logLeftY * -deltaY + m_size.height(); | ||
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r2356 | 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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r2275 | } | ||
| return result; | ||||
| } | ||||
| QPointF XLogYDomain::calculateDomainPoint(const QPointF &point) const | ||||
| { | ||||
| const qreal deltaX = m_size.width() / (m_maxX - m_minX); | ||||
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r2351 | const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY); | ||
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r2275 | qreal x = point.x() / deltaX + m_minX; | ||
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r2351 | qreal y = qPow(m_logBaseY, m_logLeftY + (m_size.height() - point.y()) / deltaY); | ||
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r2275 | return QPointF(x, y); | ||
| } | ||||
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r2483 | bool XLogYDomain::attachAxis(QAbstractAxis *axis) | ||
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r2290 | { | ||
| QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); | ||||
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r2483 | if (logAxis && logAxis->orientation() == Qt::Vertical) { | ||
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r2290 | QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal))); | ||
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r2295 | handleVerticalAxisBaseChanged(logAxis->base()); | ||
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r2356 | } | ||
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r2292 | return AbstractDomain::attachAxis(axis); | ||
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r2290 | } | ||
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r2483 | bool XLogYDomain::detachAxis(QAbstractAxis *axis) | ||
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r2290 | { | ||
| QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); | ||||
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r2483 | if (logAxis && logAxis->orientation() == Qt::Vertical) | ||
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r2290 | QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal))); | ||
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r2292 | return AbstractDomain::detachAxis(axis); | ||
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r2290 | } | ||
| void XLogYDomain::handleVerticalAxisBaseChanged(qreal baseY) | ||||
| { | ||||
| m_logBaseY = baseY; | ||||
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r2775 | qreal logMinY = std::log10(m_minY) / std::log10(m_logBaseY); | ||
| qreal logMaxY = std::log10(m_maxY) / std::log10(m_logBaseY); | ||||
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r2351 | m_logLeftY = logMinY < logMaxY ? logMinY : logMaxY; | ||
| m_logRightY = logMinY > logMaxY ? logMinY : logMaxY; | ||||
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r2322 | emit updated(); | ||
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r2290 | } | ||
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r2275 | // operators | ||
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r2712 | bool QT_CHARTS_AUTOTEST_EXPORT operator== (const XLogYDomain &domain1, const XLogYDomain &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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r2712 | bool QT_CHARTS_AUTOTEST_EXPORT operator!= (const XLogYDomain &domain1, const XLogYDomain &domain2) | ||
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r2275 | { | ||
| return !(domain1 == domain2); | ||||
| } | ||||
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r2712 | QDebug QT_CHARTS_AUTOTEST_EXPORT operator<<(QDebug dbg, const XLogYDomain &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_xlogydomain_p.cpp" | ||||
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r2712 | QT_CHARTS_END_NAMESPACE | ||