| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the Qt Charts module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:GPL$ |
| ** 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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| ** 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. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include <private/logxydomain_p.h> |
| #include <private/qabstractaxis_p.h> |
| #include <QtCharts/QLogValueAxis> |
| #include <QtCore/QtMath> |
| #include <cmath> |
| |
| QT_CHARTS_BEGIN_NAMESPACE |
| |
| LogXYDomain::LogXYDomain(QObject *parent) |
| : AbstractDomain(parent), |
| m_logLeftX(0), |
| m_logRightX(1), |
| m_logBaseX(10) |
| { |
| } |
| |
| LogXYDomain::~LogXYDomain() |
| { |
| } |
| |
| void LogXYDomain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY) |
| { |
| bool axisXChanged = false; |
| bool axisYChanged = false; |
| |
| adjustLogDomainRanges(minX, maxX); |
| |
| if (!qFuzzyCompare(m_minX, minX) || !qFuzzyCompare(m_maxX, maxX)) { |
| m_minX = minX; |
| m_maxX = maxX; |
| axisXChanged = true; |
| qreal logMinX = std::log10(m_minX) / std::log10(m_logBaseX); |
| qreal logMaxX = std::log10(m_maxX) / std::log10(m_logBaseX); |
| m_logLeftX = logMinX < logMaxX ? logMinX : logMaxX; |
| m_logRightX = logMinX > logMaxX ? logMinX : logMaxX; |
| if(!m_signalsBlocked) |
| emit rangeHorizontalChanged(m_minX, m_maxX); |
| } |
| |
| if (!qFuzzyIsNull(m_minY - minY) || !qFuzzyIsNull(m_maxY - maxY)) { |
| m_minY = minY; |
| m_maxY = maxY; |
| axisYChanged = true; |
| if (!m_signalsBlocked) |
| emit rangeVerticalChanged(m_minY, m_maxY); |
| } |
| |
| if (axisXChanged || axisYChanged) |
| emit updated(); |
| } |
| |
| void LogXYDomain::zoomIn(const QRectF &rect) |
| { |
| storeZoomReset(); |
| QRectF fixedRect = fixZoomRect(rect); |
| qreal logLeftX = fixedRect.left() * (m_logRightX - m_logLeftX) / m_size.width() + m_logLeftX; |
| qreal logRightX = fixedRect.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; |
| |
| qreal dy = spanY() / m_size.height(); |
| qreal minY = m_minY; |
| qreal maxY = m_maxY; |
| |
| minY = maxY - dy * fixedRect.bottom(); |
| maxY = maxY - dy * fixedRect.top(); |
| |
| setRange(minX, maxX, minY, maxY); |
| } |
| |
| void LogXYDomain::zoomOut(const QRectF &rect) |
| { |
| storeZoomReset(); |
| QRectF fixedRect = fixZoomRect(rect); |
| const qreal factorX = m_size.width() / fixedRect.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; |
| |
| qreal dy = spanY() / fixedRect.height(); |
| qreal minY = m_minY; |
| qreal maxY = m_maxY; |
| |
| maxY = minY + dy * fixedRect.bottom(); |
| minY = maxY - dy * m_size.height(); |
| |
| setRange(minX, maxX, minY, maxY); |
| } |
| |
| void LogXYDomain::move(qreal dx, qreal dy) |
| { |
| if (m_reverseX) |
| dx = -dx; |
| if (m_reverseY) |
| dy = -dy; |
| |
| 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; |
| |
| qreal y = spanY() / m_size.height(); |
| qreal minY = m_minY; |
| qreal maxY = m_maxY; |
| |
| if (dy != 0) { |
| minY = minY + y * dy; |
| maxY = maxY + y * dy; |
| } |
| setRange(minX, maxX, minY, maxY); |
| } |
| |
| QPointF LogXYDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const |
| { |
| const qreal deltaX = m_size.width() / (m_logRightX - m_logLeftX); |
| const qreal deltaY = m_size.height() / (m_maxY - m_minY); |
| |
| qreal x(0); |
| qreal y = (point.y() - m_minY) * deltaY; |
| if (!m_reverseY) |
| y = m_size.height() - y; |
| if (point.x() > 0) { |
| x = ((std::log10(point.x()) / std::log10(m_logBaseX)) - m_logLeftX) * deltaX; |
| if (m_reverseX) |
| x = m_size.width() - x; |
| ok = true; |
| } else { |
| x = 0; |
| qWarning() << "Logarithms of zero and negative values are undefined."; |
| ok = false; |
| } |
| return QPointF(x, y); |
| } |
| |
| QVector<QPointF> LogXYDomain::calculateGeometryPoints(const QVector<QPointF> &vector) const |
| { |
| const qreal deltaX = m_size.width() / (m_logRightX - m_logLeftX); |
| 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) { |
| if (vector[i].x() > 0) { |
| qreal x = ((std::log10(vector[i].x()) / std::log10(m_logBaseX)) - m_logLeftX) * deltaX; |
| if (m_reverseX) |
| x = m_size.width() - x; |
| qreal y = (vector[i].y() - m_minY) * deltaY; |
| if (!m_reverseY) |
| y = m_size.height() - y; |
| result[i].setX(x); |
| result[i].setY(y); |
| } else { |
| qWarning() << "Logarithms of zero and negative values are undefined."; |
| return QVector<QPointF>(); |
| } |
| |
| } |
| return result; |
| } |
| |
| QPointF LogXYDomain::calculateDomainPoint(const QPointF &point) const |
| { |
| const qreal deltaX = m_size.width() / (m_logRightX - m_logLeftX); |
| const qreal deltaY = m_size.height() / (m_maxY - m_minY); |
| qreal x = m_reverseX ? (m_size.width() - point.x()) : point.x(); |
| x = qPow(m_logBaseX, m_logLeftX + x / deltaX); |
| qreal y = m_reverseY ? point.y() : (m_size.height() - point.y()); |
| y /= deltaY; |
| y += m_minY; |
| return QPointF(x, y); |
| } |
| |
| bool LogXYDomain::attachAxis(QAbstractAxis *axis) |
| { |
| AbstractDomain::attachAxis(axis); |
| QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); |
| |
| if (logAxis && logAxis->orientation() == Qt::Horizontal) { |
| QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal))); |
| handleHorizontalAxisBaseChanged(logAxis->base()); |
| } |
| |
| return true; |
| } |
| |
| bool LogXYDomain::detachAxis(QAbstractAxis *axis) |
| { |
| AbstractDomain::detachAxis(axis); |
| QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); |
| |
| if (logAxis && logAxis->orientation() == Qt::Horizontal) |
| QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal))); |
| |
| return true; |
| } |
| |
| void LogXYDomain::handleHorizontalAxisBaseChanged(qreal baseX) |
| { |
| m_logBaseX = baseX; |
| qreal logMinX = std::log10(m_minX) / std::log10(m_logBaseX); |
| qreal logMaxX = std::log10(m_maxX) / std::log10(m_logBaseX); |
| m_logLeftX = logMinX < logMaxX ? logMinX : logMaxX; |
| m_logRightX = logMinX > logMaxX ? logMinX : logMaxX; |
| emit updated(); |
| } |
| |
| // operators |
| |
| bool Q_AUTOTEST_EXPORT operator== (const LogXYDomain &domain1, const LogXYDomain &domain2) |
| { |
| 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)); |
| } |
| |
| |
| bool Q_AUTOTEST_EXPORT operator!= (const LogXYDomain &domain1, const LogXYDomain &domain2) |
| { |
| return !(domain1 == domain2); |
| } |
| |
| |
| QDebug Q_AUTOTEST_EXPORT operator<<(QDebug dbg, const LogXYDomain &domain) |
| { |
| #ifdef QT_NO_TEXTSTREAM |
| Q_UNUSED(domain) |
| #else |
| dbg.nospace() << "AbstractDomain(" << domain.m_minX << ',' << domain.m_maxX << ',' << domain.m_minY << ',' << domain.m_maxY << ')' << domain.m_size; |
| #endif |
| return dbg.maybeSpace(); |
| } |
| |
| QT_CHARTS_END_NAMESPACE |
| |
| #include "moc_logxydomain_p.cpp" |