| /**************************************************************************** |
| ** |
| ** 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/abstractdomain_p.h> |
| #include <private/qabstractaxis_p.h> |
| #include <QtCore/QtMath> |
| #include <cmath> |
| |
| QT_CHARTS_BEGIN_NAMESPACE |
| |
| AbstractDomain::AbstractDomain(QObject *parent) |
| : QObject(parent), |
| m_minX(0), |
| m_maxX(0), |
| m_minY(0), |
| m_maxY(0), |
| m_signalsBlocked(false), |
| m_zoomed(false), |
| m_zoomResetMinX(0), |
| m_zoomResetMaxX(0), |
| m_zoomResetMinY(0), |
| m_zoomResetMaxY(0), |
| m_reverseX(false), |
| m_reverseY(false) |
| |
| { |
| } |
| |
| AbstractDomain::~AbstractDomain() |
| { |
| } |
| |
| void AbstractDomain::setSize(const QSizeF &size) |
| { |
| if (m_size != size) { |
| m_size=size; |
| emit updated(); |
| } |
| } |
| |
| QSizeF AbstractDomain::size() const |
| { |
| return m_size; |
| } |
| |
| void AbstractDomain::setRangeX(qreal min, qreal max) |
| { |
| setRange(min, max, m_minY, m_maxY); |
| } |
| |
| void AbstractDomain::setRangeY(qreal min, qreal max) |
| { |
| setRange(m_minX, m_maxX, min, max); |
| } |
| |
| void AbstractDomain::setMinX(qreal min) |
| { |
| setRange(min, m_maxX, m_minY, m_maxY); |
| } |
| |
| void AbstractDomain::setMaxX(qreal max) |
| { |
| setRange(m_minX, max, m_minY, m_maxY); |
| } |
| |
| void AbstractDomain::setMinY(qreal min) |
| { |
| setRange(m_minX, m_maxX, min, m_maxY); |
| } |
| |
| void AbstractDomain::setMaxY(qreal max) |
| { |
| setRange(m_minX, m_maxX, m_minY, max); |
| } |
| |
| qreal AbstractDomain::spanX() const |
| { |
| Q_ASSERT(m_maxX >= m_minX); |
| return m_maxX - m_minX; |
| } |
| |
| qreal AbstractDomain::spanY() const |
| { |
| Q_ASSERT(m_maxY >= m_minY); |
| return m_maxY - m_minY; |
| } |
| |
| bool AbstractDomain::isEmpty() const |
| { |
| return qFuzzyCompare(spanX(), 0) || qFuzzyCompare(spanY(), 0) || m_size.isEmpty(); |
| } |
| |
| // handlers |
| |
| void AbstractDomain::handleVerticalAxisRangeChanged(qreal min, qreal max) |
| { |
| setRangeY(min, max); |
| } |
| |
| void AbstractDomain::handleHorizontalAxisRangeChanged(qreal min, qreal max) |
| { |
| setRangeX(min, max); |
| } |
| |
| void AbstractDomain::handleReverseXChanged(bool reverse) |
| { |
| m_reverseX = reverse; |
| emit updated(); |
| } |
| |
| void AbstractDomain::handleReverseYChanged(bool reverse) |
| { |
| m_reverseY = reverse; |
| emit updated(); |
| } |
| |
| void AbstractDomain::blockRangeSignals(bool block) |
| { |
| if (m_signalsBlocked!=block) { |
| m_signalsBlocked=block; |
| if (!block) { |
| emit rangeHorizontalChanged(m_minX,m_maxX); |
| emit rangeVerticalChanged(m_minY,m_maxY); |
| } |
| } |
| } |
| |
| void AbstractDomain::zoomReset() |
| { |
| if (m_zoomed) { |
| setRange(m_zoomResetMinX, |
| m_zoomResetMaxX, |
| m_zoomResetMinY, |
| m_zoomResetMaxY); |
| m_zoomed = false; |
| } |
| } |
| |
| void AbstractDomain::storeZoomReset() |
| { |
| if (!m_zoomed) { |
| m_zoomed = true; |
| m_zoomResetMinX = m_minX; |
| m_zoomResetMaxX = m_maxX; |
| m_zoomResetMinY = m_minY; |
| m_zoomResetMaxY = m_maxY; |
| } |
| } |
| |
| //algorithm defined by Paul S.Heckbert GraphicalGems I |
| |
| void AbstractDomain::looseNiceNumbers(qreal &min, qreal &max, int &ticksCount) |
| { |
| qreal range = niceNumber(max - min, true); //range with ceiling |
| qreal step = niceNumber(range / (ticksCount - 1), false); |
| min = qFloor(min / step); |
| max = qCeil(max / step); |
| ticksCount = int(max - min) + 1; |
| min *= step; |
| max *= step; |
| } |
| |
| //nice numbers can be expressed as form of 1*10^n, 2* 10^n or 5*10^n |
| |
| qreal AbstractDomain::niceNumber(qreal x, bool ceiling) |
| { |
| qreal z = qPow(10, qFloor(std::log10(x))); //find corresponding number of the form of 10^n than is smaller than x |
| qreal q = x / z; //q<10 && q>=1; |
| |
| if (ceiling) { |
| if (q <= 1.0) q = 1; |
| else if (q <= 2.0) q = 2; |
| else if (q <= 5.0) q = 5; |
| else q = 10; |
| } else { |
| if (q < 1.5) q = 1; |
| else if (q < 3.0) q = 2; |
| else if (q < 7.0) q = 5; |
| else q = 10; |
| } |
| return q * z; |
| } |
| |
| bool AbstractDomain::attachAxis(QAbstractAxis *axis) |
| { |
| if (axis->orientation() == Qt::Vertical) { |
| QObject::connect(axis->d_ptr.data(), SIGNAL(rangeChanged(qreal,qreal)), this, SLOT(handleVerticalAxisRangeChanged(qreal,qreal))); |
| QObject::connect(this, SIGNAL(rangeVerticalChanged(qreal,qreal)), axis->d_ptr.data(), SLOT(handleRangeChanged(qreal,qreal))); |
| QObject::connect(axis, &QAbstractAxis::reverseChanged, |
| this, &AbstractDomain::handleReverseYChanged); |
| m_reverseY = axis->isReverse(); |
| } |
| |
| if (axis->orientation() == Qt::Horizontal) { |
| QObject::connect(axis->d_ptr.data(), SIGNAL(rangeChanged(qreal,qreal)), this, SLOT(handleHorizontalAxisRangeChanged(qreal,qreal))); |
| QObject::connect(this, SIGNAL(rangeHorizontalChanged(qreal,qreal)), axis->d_ptr.data(), SLOT(handleRangeChanged(qreal,qreal))); |
| QObject::connect(axis, &QAbstractAxis::reverseChanged, |
| this, &AbstractDomain::handleReverseXChanged); |
| m_reverseX = axis->isReverse(); |
| } |
| |
| return true; |
| } |
| |
| bool AbstractDomain::detachAxis(QAbstractAxis *axis) |
| { |
| if (axis->orientation() == Qt::Vertical) { |
| QObject::disconnect(axis->d_ptr.data(), SIGNAL(rangeChanged(qreal,qreal)), this, SLOT(handleVerticalAxisRangeChanged(qreal,qreal))); |
| QObject::disconnect(this, SIGNAL(rangeVerticalChanged(qreal,qreal)), axis->d_ptr.data(), SLOT(handleRangeChanged(qreal,qreal))); |
| QObject::disconnect(axis, &QAbstractAxis::reverseChanged, |
| this, &AbstractDomain::handleReverseYChanged); |
| } |
| |
| if (axis->orientation() == Qt::Horizontal) { |
| QObject::disconnect(axis->d_ptr.data(), SIGNAL(rangeChanged(qreal,qreal)), this, SLOT(handleHorizontalAxisRangeChanged(qreal,qreal))); |
| QObject::disconnect(this, SIGNAL(rangeHorizontalChanged(qreal,qreal)), axis->d_ptr.data(), SLOT(handleRangeChanged(qreal,qreal))); |
| QObject::disconnect(axis, &QAbstractAxis::reverseChanged, |
| this, &AbstractDomain::handleReverseXChanged); |
| } |
| |
| return true; |
| } |
| |
| // operators |
| |
| bool Q_AUTOTEST_EXPORT operator== (const AbstractDomain &domain1, const AbstractDomain &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 AbstractDomain &domain1, const AbstractDomain &domain2) |
| { |
| return !(domain1 == domain2); |
| } |
| |
| |
| QDebug Q_AUTOTEST_EXPORT operator<<(QDebug dbg, const AbstractDomain &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(); |
| } |
| |
| // This function adjusts min/max ranges to failsafe values if negative/zero values are attempted. |
| void AbstractDomain::adjustLogDomainRanges(qreal &min, qreal &max) |
| { |
| if (min <= 0) { |
| min = 1.0; |
| if (max <= min) |
| max = min + 1.0; |
| } |
| } |
| |
| // This function fixes the zoom rect based on axis reversals |
| QRectF AbstractDomain::fixZoomRect(const QRectF &rect) |
| { |
| QRectF fixRect = rect; |
| if (m_reverseX || m_reverseY) { |
| QPointF center = rect.center(); |
| if (m_reverseX) |
| center.setX(m_size.width() - center.x()); |
| if (m_reverseY) |
| center.setY(m_size.height() - center.y()); |
| fixRect.moveCenter(QPointF(center.x(), center.y())); |
| } |
| |
| return fixRect; |
| } |
| |
| QT_CHARTS_END_NAMESPACE |
| |
| #include "moc_abstractdomain_p.cpp" |