logxydomain.cpp
255 lines
| 8.2 KiB
| text/x-c
|
CppLexer
Miikka Heikkinen
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r2854 | /**************************************************************************** | ||
Marek Rosa
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r2275 | ** | ||
|
Miikka Heikkinen
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r2854 | ** Copyright (C) 2016 The Qt Company Ltd. | ||
| ** Contact: https://www.qt.io/licensing/ | ||||
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Marek Rosa
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r2275 | ** | ||
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Miikka Heikkinen
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r2854 | ** This file is part of the Qt Charts module of the Qt Toolkit. | ||
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Marek Rosa
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r2275 | ** | ||
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Miikka Heikkinen
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r2854 | ** $QT_BEGIN_LICENSE:GPL$ | ||
Titta Heikkala
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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 | ||||
|
Miikka Heikkinen
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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. | ||||
|
Marek Rosa
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r2275 | ** | ||
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Titta Heikkala
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r2845 | ** $QT_END_LICENSE$ | ||
| ** | ||||
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Miikka Heikkinen
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r2854 | ****************************************************************************/ | ||
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Marek Rosa
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r2275 | |||
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Titta Heikkala
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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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Titta Heikkala
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r2775 | #include <cmath> | ||
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Marek Rosa
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r2275 | |||
Titta Heikkala
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r2712 | QT_CHARTS_BEGIN_NAMESPACE | ||
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Marek Rosa
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r2275 | |||
| LogXYDomain::LogXYDomain(QObject *parent) | ||||
| : AbstractDomain(parent), | ||||
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Marek Rosa
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r2351 | m_logLeftX(0), | ||
| m_logRightX(1), | ||||
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Marek Rosa
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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; | ||||
Miikka Heikkinen
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r2483 | adjustLogDomainRanges(minX, maxX); | ||
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Marek Rosa
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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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Titta Heikkala
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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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Marek Rosa
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r2351 | m_logLeftX = logMinX < logMaxX ? logMinX : logMaxX; | ||
| m_logRightX = logMinX > logMaxX ? logMinX : logMaxX; | ||||
Michal Klocek
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r2288 | if(!m_signalsBlocked) | ||
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Marek Rosa
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r2356 | emit rangeHorizontalChanged(m_minX, m_maxX); | ||
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Marek Rosa
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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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Miikka Heikkinen
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r2483 | if (!m_signalsBlocked) | ||
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Marek Rosa
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r2356 | emit rangeVerticalChanged(m_minY, m_maxY); | ||
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Marek Rosa
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r2275 | } | ||
| if (axisXChanged || axisYChanged) | ||||
| emit updated(); | ||||
| } | ||||
| void LogXYDomain::zoomIn(const QRectF &rect) | ||||
| { | ||||
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Miikka Heikkinen
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r2545 | storeZoomReset(); | ||
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Marek Rosa
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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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Marek Rosa
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r2275 | |||
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Marek Rosa
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r2280 | qreal dy = spanY() / m_size.height(); | ||
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Marek Rosa
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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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Miikka Heikkinen
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r2545 | storeZoomReset(); | ||
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Marek Rosa
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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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Marek Rosa
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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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Marek Rosa
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r2275 | |||
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Marek Rosa
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r2280 | qreal y = spanY() / m_size.height(); | ||
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Marek Rosa
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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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Marek Rosa
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r2356 | QPointF LogXYDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const | ||
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Marek Rosa
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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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Marek Rosa
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r2275 | |||
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Titta Heikkala
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r2611 | qreal x(0); | ||
| qreal y = (point.y() - m_minY) * -deltaY + m_size.height(); | ||||
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Marek Rosa
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r2356 | if (point.x() > 0) { | ||
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Titta Heikkala
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r2775 | x = (std::log10(point.x()) / std::log10(m_logBaseX)) * deltaX - m_logLeftX * deltaX; | ||
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Marek Rosa
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r2356 | ok = true; | ||
| } else { | ||||
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Titta Heikkala
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r2611 | x = 0; | ||
| qWarning() << "Logarithms of zero and negative values are undefined."; | ||||
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Marek Rosa
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r2356 | ok = false; | ||
| } | ||||
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Titta Heikkala
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r2611 | return QPointF(x, y); | ||
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Marek Rosa
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r2275 | } | ||
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Miikka Heikkinen
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r2820 | QVector<QPointF> LogXYDomain::calculateGeometryPoints(const QVector<QPointF> &vector) const | ||
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Marek Rosa
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r2275 | { | ||
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Marek Rosa
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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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Marek Rosa
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r2356 | if (vector[i].x() > 0) { | ||
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Titta Heikkala
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r2775 | qreal x = (std::log10(vector[i].x()) / std::log10(m_logBaseX)) * deltaX - m_logLeftX * deltaX; | ||
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Marek Rosa
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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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Titta Heikkala
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r2611 | qWarning() << "Logarithms of zero and negative values are undefined."; | ||
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Marek Rosa
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r2356 | return QVector<QPointF>(); | ||
| } | ||||
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r2611 | |||
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Marek Rosa
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r2275 | } | ||
| return result; | ||||
| } | ||||
| QPointF LogXYDomain::calculateDomainPoint(const QPointF &point) const | ||||
| { | ||||
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Marek Rosa
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r2351 | const qreal deltaX = m_size.width() / (m_logRightX - m_logLeftX); | ||
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Marek Rosa
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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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Marek Rosa
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r2275 | qreal y = (point.y() - m_size.height()) / (-deltaY) + m_minY; | ||
| return QPointF(x, y); | ||||
| } | ||||
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Miikka Heikkinen
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r2483 | bool LogXYDomain::attachAxis(QAbstractAxis *axis) | ||
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Marek Rosa
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r2290 | { | ||
| AbstractDomain::attachAxis(axis); | ||||
| QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); | ||||
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Miikka Heikkinen
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r2483 | if (logAxis && logAxis->orientation() == Qt::Horizontal) { | ||
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Marek Rosa
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r2290 | QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal))); | ||
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Marek Rosa
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r2295 | handleHorizontalAxisBaseChanged(logAxis->base()); | ||
| } | ||||
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Marek Rosa
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r2290 | |||
| return true; | ||||
| } | ||||
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Miikka Heikkinen
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r2483 | bool LogXYDomain::detachAxis(QAbstractAxis *axis) | ||
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Marek Rosa
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r2290 | { | ||
| AbstractDomain::detachAxis(axis); | ||||
| QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis); | ||||
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Miikka Heikkinen
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r2483 | if (logAxis && logAxis->orientation() == Qt::Horizontal) | ||
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Marek Rosa
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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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Titta Heikkala
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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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Marek Rosa
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r2351 | m_logLeftX = logMinX < logMaxX ? logMinX : logMaxX; | ||
| m_logRightX = logMinX > logMaxX ? logMinX : logMaxX; | ||||
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Marek Rosa
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r2322 | emit updated(); | ||
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Marek Rosa
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r2290 | } | ||
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Marek Rosa
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r2275 | // operators | ||
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Titta Heikkala
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r2712 | bool QT_CHARTS_AUTOTEST_EXPORT operator== (const LogXYDomain &domain1, const LogXYDomain &domain2) | ||
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Marek Rosa
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r2275 | { | ||
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Miikka Heikkinen
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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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Marek Rosa
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r2275 | } | ||
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Titta Heikkala
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r2712 | bool QT_CHARTS_AUTOTEST_EXPORT operator!= (const LogXYDomain &domain1, const LogXYDomain &domain2) | ||
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Marek Rosa
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r2275 | { | ||
| return !(domain1 == domain2); | ||||
| } | ||||
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Titta Heikkala
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r2712 | QDebug QT_CHARTS_AUTOTEST_EXPORT operator<<(QDebug dbg, const LogXYDomain &domain) | ||
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Marek Rosa
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r2275 | { | ||
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Titta Heikkala
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r2620 | #ifdef QT_NO_TEXTSTREAM | ||
| Q_UNUSED(domain) | ||||
| #else | ||||
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Marek Rosa
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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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Titta Heikkala
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r2620 | #endif | ||
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r2275 | return dbg.maybeSpace(); | ||
| } | ||||
| #include "moc_logxydomain_p.cpp" | ||||
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Titta Heikkala
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r2712 | QT_CHARTS_END_NAMESPACE | ||