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/****************************************************************************
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**
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** Copyright (C) 2014 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.io
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**
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** This file is part of the Qt Charts module.
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**
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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** agreement between you and Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.io
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**
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****************************************************************************/
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#include <private/abstractdomain_p.h>
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#include <private/qabstractaxis_p.h>
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#include <QtCore/QtMath>
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QT_CHARTS_BEGIN_NAMESPACE
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AbstractDomain::AbstractDomain(QObject *parent)
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: QObject(parent),
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m_minX(0),
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m_maxX(0),
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m_minY(0),
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m_maxY(0),
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m_signalsBlocked(false),
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m_zoomed(false),
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m_zoomResetMinX(0),
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m_zoomResetMaxX(0),
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m_zoomResetMinY(0),
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m_zoomResetMaxY(0)
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{
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}
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AbstractDomain::~AbstractDomain()
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{
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}
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void AbstractDomain::setSize(const QSizeF &size)
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{
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if (m_size != size) {
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m_size=size;
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emit updated();
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}
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}
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QSizeF AbstractDomain::size() const
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{
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return m_size;
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}
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void AbstractDomain::setRangeX(qreal min, qreal max)
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{
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setRange(min, max, m_minY, m_maxY);
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}
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void AbstractDomain::setRangeY(qreal min, qreal max)
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{
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setRange(m_minX, m_maxX, min, max);
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}
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void AbstractDomain::setMinX(qreal min)
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{
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setRange(min, m_maxX, m_minY, m_maxY);
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}
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void AbstractDomain::setMaxX(qreal max)
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{
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setRange(m_minX, max, m_minY, m_maxY);
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}
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void AbstractDomain::setMinY(qreal min)
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{
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setRange(m_minX, m_maxX, min, m_maxY);
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}
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void AbstractDomain::setMaxY(qreal max)
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{
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setRange(m_minX, m_maxX, m_minY, max);
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}
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qreal AbstractDomain::spanX() const
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{
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Q_ASSERT(m_maxX >= m_minX);
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return m_maxX - m_minX;
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}
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qreal AbstractDomain::spanY() const
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{
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Q_ASSERT(m_maxY >= m_minY);
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return m_maxY - m_minY;
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}
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bool AbstractDomain::isEmpty() const
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{
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return qFuzzyCompare(spanX(), 0) || qFuzzyCompare(spanY(), 0) || m_size.isEmpty();
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}
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QPointF AbstractDomain::calculateDomainPoint(const QPointF &point) const
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{
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const qreal deltaX = m_size.width() / (m_maxX - m_minX);
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const qreal deltaY = m_size.height() / (m_maxY - m_minY);
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qreal x = point.x() / deltaX + m_minX;
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qreal y = (point.y() - m_size.height()) / (-deltaY) + m_minY;
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return QPointF(x, y);
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}
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// handlers
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void AbstractDomain::handleVerticalAxisRangeChanged(qreal min, qreal max)
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{
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setRangeY(min, max);
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}
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void AbstractDomain::handleHorizontalAxisRangeChanged(qreal min, qreal max)
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{
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setRangeX(min, max);
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}
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void AbstractDomain::blockRangeSignals(bool block)
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{
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if (m_signalsBlocked!=block) {
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m_signalsBlocked=block;
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if (!block) {
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emit rangeHorizontalChanged(m_minX,m_maxX);
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emit rangeVerticalChanged(m_minY,m_maxY);
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}
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}
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}
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void AbstractDomain::zoomReset()
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{
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if (m_zoomed) {
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setRange(m_zoomResetMinX,
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m_zoomResetMaxX,
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m_zoomResetMinY,
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m_zoomResetMaxY);
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m_zoomed = false;
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}
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}
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void AbstractDomain::storeZoomReset()
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{
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if (!m_zoomed) {
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m_zoomed = true;
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m_zoomResetMinX = m_minX;
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m_zoomResetMaxX = m_maxX;
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m_zoomResetMinY = m_minY;
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m_zoomResetMaxY = m_maxY;
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}
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}
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//algorithm defined by Paul S.Heckbert GraphicalGems I
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void AbstractDomain::looseNiceNumbers(qreal &min, qreal &max, int &ticksCount)
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{
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qreal range = niceNumber(max - min, true); //range with ceiling
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qreal step = niceNumber(range / (ticksCount - 1), false);
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min = qFloor(min / step);
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max = qCeil(max / step);
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ticksCount = int(max - min) + 1;
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min *= step;
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max *= step;
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}
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//nice numbers can be expressed as form of 1*10^n, 2* 10^n or 5*10^n
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qreal AbstractDomain::niceNumber(qreal x, bool ceiling)
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{
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qreal z = qPow(10, qFloor(log10(x))); //find corresponding number of the form of 10^n than is smaller than x
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qreal q = x / z; //q<10 && q>=1;
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if (ceiling) {
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if (q <= 1.0) q = 1;
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else if (q <= 2.0) q = 2;
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else if (q <= 5.0) q = 5;
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else q = 10;
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} else {
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if (q < 1.5) q = 1;
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else if (q < 3.0) q = 2;
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else if (q < 7.0) q = 5;
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else q = 10;
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}
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return q * z;
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}
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bool AbstractDomain::attachAxis(QAbstractAxis *axis)
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{
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if (axis->orientation() == Qt::Vertical) {
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QObject::connect(axis->d_ptr.data(), SIGNAL(rangeChanged(qreal,qreal)), this, SLOT(handleVerticalAxisRangeChanged(qreal,qreal)));
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QObject::connect(this, SIGNAL(rangeVerticalChanged(qreal,qreal)), axis->d_ptr.data(), SLOT(handleRangeChanged(qreal,qreal)));
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}
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if (axis->orientation() == Qt::Horizontal) {
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QObject::connect(axis->d_ptr.data(), SIGNAL(rangeChanged(qreal,qreal)), this, SLOT(handleHorizontalAxisRangeChanged(qreal,qreal)));
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QObject::connect(this, SIGNAL(rangeHorizontalChanged(qreal,qreal)), axis->d_ptr.data(), SLOT(handleRangeChanged(qreal,qreal)));
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}
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return true;
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}
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bool AbstractDomain::detachAxis(QAbstractAxis *axis)
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{
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if (axis->orientation() == Qt::Vertical) {
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QObject::disconnect(axis->d_ptr.data(), SIGNAL(rangeChanged(qreal,qreal)), this, SLOT(handleVerticalAxisRangeChanged(qreal,qreal)));
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QObject::disconnect(this, SIGNAL(rangeVerticalChanged(qreal,qreal)), axis->d_ptr.data(), SLOT(handleRangeChanged(qreal,qreal)));
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}
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if (axis->orientation() == Qt::Horizontal) {
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QObject::disconnect(axis->d_ptr.data(), SIGNAL(rangeChanged(qreal,qreal)), this, SLOT(handleHorizontalAxisRangeChanged(qreal,qreal)));
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QObject::disconnect(this, SIGNAL(rangeHorizontalChanged(qreal,qreal)), axis->d_ptr.data(), SLOT(handleRangeChanged(qreal,qreal)));
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}
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return true;
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}
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// operators
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bool QT_CHARTS_AUTOTEST_EXPORT operator== (const AbstractDomain &domain1, const AbstractDomain &domain2)
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{
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return (qFuzzyIsNull(domain1.m_maxX - domain2.m_maxX)
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&& qFuzzyIsNull(domain1.m_maxY - domain2.m_maxY)
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&& qFuzzyIsNull(domain1.m_minX - domain2.m_minX)
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&& qFuzzyIsNull(domain1.m_minY - domain2.m_minY));
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}
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bool QT_CHARTS_AUTOTEST_EXPORT operator!= (const AbstractDomain &domain1, const AbstractDomain &domain2)
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{
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return !(domain1 == domain2);
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}
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QDebug QT_CHARTS_AUTOTEST_EXPORT operator<<(QDebug dbg, const AbstractDomain &domain)
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{
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#ifdef QT_NO_TEXTSTREAM
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Q_UNUSED(domain)
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#else
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dbg.nospace() << "AbstractDomain(" << domain.m_minX << ',' << domain.m_maxX << ',' << domain.m_minY << ',' << domain.m_maxY << ')' << domain.m_size;
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#endif
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return dbg.maybeSpace();
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}
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// This function adjusts min/max ranges to failsafe values if negative/zero values are attempted.
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void AbstractDomain::adjustLogDomainRanges(qreal &min, qreal &max)
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{
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if (min <= 0) {
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min = 1.0;
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if (max <= min)
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max = min + 1.0;
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}
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}
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#include "moc_abstractdomain_p.cpp"
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QT_CHARTS_END_NAMESPACE
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