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Diffstat (limited to 'src/charts/domain/abstractdomain.cpp')
| -rw-r--r-- | src/charts/domain/abstractdomain.cpp | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/src/charts/domain/abstractdomain.cpp b/src/charts/domain/abstractdomain.cpp new file mode 100644 index 00000000..c16e46d5 --- /dev/null +++ b/src/charts/domain/abstractdomain.cpp @@ -0,0 +1,265 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc +** All rights reserved. +** For any questions to Digia, please use contact form at http://qt.digia.com +** +** This file is part of the Qt Enterprise Charts Add-on. +** +** $QT_BEGIN_LICENSE$ +** Licensees holding valid Qt Enterprise licenses may use this file in +** accordance with the Qt Enterprise License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. +** +** If you have questions regarding the use of this file, please use +** contact form at http://qt.digia.com +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "abstractdomain_p.h" +#include "qabstractaxis_p.h" +#include <qmath.h> + +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) + +{ +} + +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(); +} + +QPointF AbstractDomain::calculateDomainPoint(const QPointF &point) const +{ + const qreal deltaX = m_size.width() / (m_maxX - m_minX); + const qreal deltaY = m_size.height() / (m_maxY - m_minY); + qreal x = point.x() / deltaX + m_minX; + qreal y = (point.y() - m_size.height()) / (-deltaY) + m_minY; + return QPointF(x, y); +} + +// handlers + +void AbstractDomain::handleVerticalAxisRangeChanged(qreal min, qreal max) +{ + setRangeY(min, max); +} + +void AbstractDomain::handleHorizontalAxisRangeChanged(qreal min, qreal max) +{ + setRangeX(min, max); +} + +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(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))); + } + + 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))); + } + + 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))); + } + + 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))); + } + + return true; +} + +// operators + +bool QT_CHARTS_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 QT_CHARTS_AUTOTEST_EXPORT operator!= (const AbstractDomain &domain1, const AbstractDomain &domain2) +{ + return !(domain1 == domain2); +} + + +QDebug QT_CHARTS_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; + } +} + + +#include "moc_abstractdomain_p.cpp" + +QT_CHARTS_END_NAMESPACE |