| /**************************************************************************** |
| ** |
| ** 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 |
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| ** |
| ** 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/xlogydomain_p.h> |
| #include <private/qabstractaxis_p.h> |
| #include <QtCharts/QLogValueAxis> |
| #include <QtCore/QtMath> |
| #include <cmath> |
| |
| QT_CHARTS_BEGIN_NAMESPACE |
| |
| XLogYDomain::XLogYDomain(QObject *parent) |
| : AbstractDomain(parent), |
| m_logLeftY(0), |
| m_logRightY(1), |
| m_logBaseY(10) |
| { |
| } |
| |
| XLogYDomain::~XLogYDomain() |
| { |
| } |
| |
| void XLogYDomain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY) |
| { |
| bool axisXChanged = false; |
| bool axisYChanged = false; |
| |
| adjustLogDomainRanges(minY, maxY); |
| |
| if (!qFuzzyIsNull(m_minX - minX) || !qFuzzyIsNull(m_maxX - maxX)) { |
| m_minX = minX; |
| m_maxX = maxX; |
| axisXChanged = true; |
| 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; |
| qreal logMinY = std::log10(m_minY) / std::log10(m_logBaseY); |
| qreal logMaxY = std::log10(m_maxY) / std::log10(m_logBaseY); |
| m_logLeftY = logMinY < logMaxY ? logMinY : logMaxY; |
| m_logRightY = logMinY > logMaxY ? logMinY : logMaxY; |
| if (!m_signalsBlocked) |
| emit rangeVerticalChanged(m_minY, m_maxY); |
| } |
| |
| if (axisXChanged || axisYChanged) |
| emit updated(); |
| } |
| |
| void XLogYDomain::zoomIn(const QRectF &rect) |
| { |
| storeZoomReset(); |
| QRectF fixedRect = fixZoomRect(rect); |
| qreal dx = spanX() / m_size.width(); |
| qreal maxX = m_maxX; |
| qreal minX = m_minX; |
| |
| maxX = minX + dx * fixedRect.right(); |
| minX = minX + dx * fixedRect.left(); |
| |
| qreal logLeftY = m_logRightY - fixedRect.bottom() * (m_logRightY - m_logLeftY) / m_size.height(); |
| qreal logRightY = m_logRightY - fixedRect.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; |
| |
| setRange(minX, maxX, minY, maxY); |
| } |
| |
| void XLogYDomain::zoomOut(const QRectF &rect) |
| { |
| storeZoomReset(); |
| QRectF fixedRect = fixZoomRect(rect); |
| qreal dx = spanX() / fixedRect.width(); |
| qreal maxX = m_maxX; |
| qreal minX = m_minX; |
| |
| minX = maxX - dx * fixedRect.right(); |
| maxX = minX + dx * m_size.width(); |
| |
| const qreal factorY = m_size.height() / fixedRect.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; |
| |
| setRange(minX, maxX, minY, maxY); |
| } |
| |
| void XLogYDomain::move(qreal dx, qreal dy) |
| { |
| if (m_reverseX) |
| dx = -dx; |
| if (m_reverseY) |
| dy = -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; |
| } |
| |
| 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; |
| |
| setRange(minX, maxX, minY, maxY); |
| } |
| |
| QPointF XLogYDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const |
| { |
| const qreal deltaX = m_size.width() / (m_maxX - m_minX); |
| const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY); |
| |
| qreal x = (point.x() - m_minX) * deltaX; |
| if (m_reverseX) |
| x = m_size.width() - x; |
| qreal y(0); |
| if (point.y() > 0) { |
| y = ((std::log10(point.y()) / std::log10(m_logBaseY)) - m_logLeftY) * deltaY; |
| if (!m_reverseY) |
| y = m_size.height() - y; |
| ok = true; |
| } else { |
| y = m_size.height(); |
| qWarning() << "Logarithms of zero and negative values are undefined."; |
| ok = false; |
| } |
| return QPointF(x, y); |
| } |
| |
| QVector<QPointF> XLogYDomain::calculateGeometryPoints(const QVector<QPointF> &vector) const |
| { |
| const qreal deltaX = m_size.width() / (m_maxX - m_minX); |
| const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY); |
| |
| QVector<QPointF> result; |
| result.resize(vector.count()); |
| |
| for (int i = 0; i < vector.count(); ++i) { |
| if (vector[i].y() > 0) { |
| qreal x = (vector[i].x() - m_minX) * deltaX; |
| if (m_reverseX) |
| x = m_size.width() - x; |
| qreal y = ((std::log10(vector[i].y()) / std::log10(m_logBaseY)) - m_logLeftY) * 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 XLogYDomain::calculateDomainPoint(const QPointF &point) const |
| { |
| const qreal deltaX = m_size.width() / (m_maxX - m_minX); |
| const qreal deltaY = m_size.height() / qAbs(m_logRightY - m_logLeftY); |
| qreal x = m_reverseX ? (m_size.width() - point.x()) : point.x(); |
| x /= deltaX; |
| x += m_minX; |
| qreal y = m_reverseY ? point.y() : (m_size.height() - point.y()); |
| y = qPow(m_logBaseY, m_logLeftY + y / deltaY); |
| return QPointF(x, y); |
| } |
| |
| bool XLogYDomain::attachAxis(QAbstractAxis *axis) |
| { |
| QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); |
| |
| if (logAxis && logAxis->orientation() == Qt::Vertical) { |
| QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal))); |
| handleVerticalAxisBaseChanged(logAxis->base()); |
| } |
| return AbstractDomain::attachAxis(axis); |
| } |
| |
| bool XLogYDomain::detachAxis(QAbstractAxis *axis) |
| { |
| QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); |
| |
| if (logAxis && logAxis->orientation() == Qt::Vertical) |
| QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleVerticalAxisBaseChanged(qreal))); |
| |
| return AbstractDomain::detachAxis(axis); |
| } |
| |
| void XLogYDomain::handleVerticalAxisBaseChanged(qreal baseY) |
| { |
| m_logBaseY = baseY; |
| qreal logMinY = std::log10(m_minY) / std::log10(m_logBaseY); |
| qreal logMaxY = std::log10(m_maxY) / std::log10(m_logBaseY); |
| m_logLeftY = logMinY < logMaxY ? logMinY : logMaxY; |
| m_logRightY = logMinY > logMaxY ? logMinY : logMaxY; |
| emit updated(); |
| } |
| |
| // operators |
| |
| bool Q_AUTOTEST_EXPORT operator== (const XLogYDomain &domain1, const XLogYDomain &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 XLogYDomain &domain1, const XLogYDomain &domain2) |
| { |
| return !(domain1 == domain2); |
| } |
| |
| |
| QDebug Q_AUTOTEST_EXPORT operator<<(QDebug dbg, const XLogYDomain &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_xlogydomain_p.cpp" |