domain.cpp
296 lines
| 7.1 KiB
| text/x-c
|
CppLexer
/ src / domain.cpp
Jani Honkonen
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r794 | /**************************************************************************** | ||
| ** | ||||
| ** Copyright (C) 2012 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 Commercial Charts Add-on. | ||||
| ** | ||||
| ** $QT_BEGIN_LICENSE$ | ||||
| ** Licensees holding valid Qt Commercial licenses may use this file in | ||||
| ** accordance with the Qt Commercial 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 | ||||
| ** $QT_END_LICENSE$ | ||||
| ** | ||||
| ****************************************************************************/ | ||||
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r131 | #include "domain_p.h" | ||
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r1698 | #include "qabstractaxis_p.h" | ||
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r2273 | #include <qmath.h> | ||
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r131 | |||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
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r2104 | Domain::Domain(QObject *parent) | ||
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r2097 | : QObject(parent), | ||
| m_minX(0), | ||||
| m_maxX(0), | ||||
| m_minY(0), | ||||
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r2273 | m_maxY(0), | ||
| m_axisSignalsBlocked(false) | ||||
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r131 | { | ||
| } | ||||
| Domain::~Domain() | ||||
| { | ||||
| } | ||||
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r2273 | void Domain::setSize(const QSizeF& size) | ||
| { | ||||
| if(m_size!=size) | ||||
| { | ||||
| m_size=size; | ||||
| emit updated(); | ||||
| } | ||||
| } | ||||
| QSizeF Domain::size() const | ||||
| { | ||||
| return m_size; | ||||
| } | ||||
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r439 | void Domain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY) | ||
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r678 | { | ||
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r1078 | bool axisXChanged = false; | ||
| bool axisYChanged = false; | ||||
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r439 | |||
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r2242 | if (!qFuzzyCompare(m_minX, minX) || !qFuzzyCompare(m_maxX, maxX)) { | ||
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r2097 | m_minX = minX; | ||
| m_maxX = maxX; | ||||
| axisXChanged = true; | ||||
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r2273 | emit rangeHorizontalChanged(m_minX, m_maxX); | ||
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r678 | } | ||
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r2242 | if (!qFuzzyCompare(m_minY, minY) || !qFuzzyCompare(m_maxY, maxY)) { | ||
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r2097 | m_minY = minY; | ||
| m_maxY = maxY; | ||||
| axisYChanged = true; | ||||
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r2273 | emit rangeVerticalChanged(m_minY, m_maxY); | ||
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r678 | } | ||
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r2097 | if (axisXChanged || axisYChanged) | ||
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r1698 | emit updated(); | ||
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r439 | } | ||
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r678 | |||
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r439 | void Domain::setRangeX(qreal min, qreal max) | ||
| { | ||||
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r2097 | setRange(min, max, m_minY, m_maxY); | ||
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r439 | } | ||
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r679 | |||
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r439 | void Domain::setRangeY(qreal min, qreal max) | ||
| { | ||||
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r678 | setRange(m_minX, m_maxX, min, max); | ||
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r439 | } | ||
| void Domain::setMinX(qreal min) | ||||
| { | ||||
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r678 | setRange(min, m_maxX, m_minY, m_maxY); | ||
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r439 | } | ||
| void Domain::setMaxX(qreal max) | ||||
| { | ||||
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r678 | setRange(m_minX, max, m_minY, m_maxY); | ||
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r439 | } | ||
| void Domain::setMinY(qreal min) | ||||
| { | ||||
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r678 | setRange(m_minX, m_maxX, min, m_maxY); | ||
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r439 | } | ||
| void Domain::setMaxY(qreal max) | ||||
| { | ||||
| setRange(m_minX, m_maxX, m_minY, max); | ||||
| } | ||||
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r131 | qreal Domain::spanX() const | ||
| { | ||||
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r439 | Q_ASSERT(m_maxX >= m_minX); | ||
| return m_maxX - m_minX; | ||||
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r131 | } | ||
| qreal Domain::spanY() const | ||||
| { | ||||
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r439 | Q_ASSERT(m_maxY >= m_minY); | ||
| return m_maxY - m_minY; | ||||
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r131 | } | ||
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r388 | bool Domain::isEmpty() const | ||
| { | ||||
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r2273 | return qFuzzyCompare(spanX(),0) || qFuzzyCompare(spanY(),0) || m_size.isEmpty() ; | ||
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r388 | } | ||
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r2273 | void Domain::zoomIn(const QRectF &rect) | ||
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r131 | { | ||
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r2273 | qreal dx = spanX() / m_size.width(); | ||
| qreal dy = spanY() / m_size.height(); | ||||
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r131 | |||
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r1078 | qreal maxX = m_maxX; | ||
| qreal minX = m_minX; | ||||
| qreal minY = m_minY; | ||||
| qreal maxY = m_maxY; | ||||
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r439 | |||
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r1078 | maxX = minX + dx * rect.right(); | ||
| minX = minX + dx * rect.left(); | ||||
| minY = maxY - dy * rect.bottom(); | ||||
| maxY = maxY - dy * rect.top(); | ||||
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r678 | |||
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r2097 | setRange(minX, maxX, minY, maxY); | ||
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r439 | } | ||
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r2273 | void Domain::zoomOut(const QRectF &rect) | ||
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r439 | { | ||
| qreal dx = spanX() / rect.width(); | ||||
| qreal dy = spanY() / rect.height(); | ||||
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r131 | |||
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r1078 | qreal maxX = m_maxX; | ||
| qreal minX = m_minX; | ||||
| qreal minY = m_minY; | ||||
| qreal maxY = m_maxY; | ||||
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r131 | |||
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r1078 | minX = maxX - dx * rect.right(); | ||
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r2273 | maxX = minX + dx * m_size.width(); | ||
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r1078 | maxY = minY + dy * rect.bottom(); | ||
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r2273 | minY = maxY - dy * m_size.height(); | ||
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r1078 | |||
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r2097 | setRange(minX, maxX, minY, maxY); | ||
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r531 | } | ||
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r2273 | void Domain::move(qreal dx, qreal dy) | ||
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r531 | { | ||
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r2273 | qreal x = spanX() / m_size.width(); | ||
| qreal y = spanY() / m_size.height(); | ||||
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r531 | |||
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r1078 | qreal maxX = m_maxX; | ||
| qreal minX = m_minX; | ||||
| qreal minY = m_minY; | ||||
| qreal maxY = m_maxY; | ||||
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r2097 | if (dx != 0) { | ||
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r1078 | minX = minX + x * dx; | ||
| maxX = maxX + x * dx; | ||||
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r531 | } | ||
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r2097 | if (dy != 0) { | ||
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r1078 | minY = minY + y * dy; | ||
| maxY = maxY + y * dy; | ||||
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r531 | } | ||
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r2097 | setRange(minX, maxX, minY, maxY); | ||
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r439 | } | ||
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r2273 | QPointF Domain::calculateGeometryPoint(const QPointF &point) const | ||
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r678 | { | ||
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r2273 | const qreal deltaX = m_size.width() / (m_maxX - m_minX); | ||
| const qreal deltaY = m_size.height() / (m_maxY - m_minY); | ||||
| qreal x = (point.x() - m_minX) * deltaX; | ||||
| qreal y = (point.y() - m_minY) * -deltaY + m_size.height(); | ||||
| return QPointF(x, y); | ||||
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r678 | } | ||
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r2273 | QVector<QPointF> Domain::calculateGeometryPoints(const QList<QPointF>& vector) const | ||
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r554 | { | ||
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r2273 | const qreal deltaX = m_size.width() / (m_maxX - m_minX); | ||
| 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) { | ||||
| qreal x = (vector[i].x() - m_minX) * deltaX; | ||||
| qreal y = (vector[i].y() - m_minY) * -deltaY + m_size.height(); | ||||
| result[i].setX(x); | ||||
| result[i].setY(y); | ||||
| } | ||||
| return result; | ||||
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r554 | } | ||
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r2273 | QPointF Domain::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 Domain::handleVerticalAxisRangeChanged(qreal min, qreal max) | ||||
| { | ||||
| if(!m_axisSignalsBlocked) | ||||
| setRangeY(min, max); | ||||
| } | ||||
| void Domain::handleHorizontalAxisRangeChanged(qreal min, qreal max) | ||||
| { | ||||
| if(!m_axisSignalsBlocked) | ||||
| setRangeX(min, max); | ||||
| } | ||||
| void Domain::blockAxisSignals(bool block) | ||||
| { | ||||
| m_axisSignalsBlocked=block; | ||||
| } | ||||
| //algorithm defined by Paul S.Heckbert GraphicalGems I | ||||
| void Domain::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 Domain::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; | ||||
| } | ||||
| // operators | ||||
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r1066 | bool QTCOMMERCIALCHART_AUTOTEST_EXPORT operator== (const Domain &domain1, const Domain &domain2) | ||
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r220 | { | ||
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r2242 | return (qFuzzyCompare(domain1.m_maxX, domain2.m_maxX) && | ||
| qFuzzyCompare(domain1.m_maxY, domain2.m_maxY) && | ||||
| qFuzzyCompare(domain1.m_minX, domain2.m_minX) && | ||||
| qFuzzyCompare(domain1.m_minY, domain2.m_minY)); | ||||
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r220 | } | ||
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r1066 | |||
| bool QTCOMMERCIALCHART_AUTOTEST_EXPORT operator!= (const Domain &domain1, const Domain &domain2) | ||||
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r220 | { | ||
| return !(domain1 == domain2); | ||||
| } | ||||
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r1066 | |||
| QDebug QTCOMMERCIALCHART_AUTOTEST_EXPORT operator<<(QDebug dbg, const Domain &domain) | ||||
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r222 | { | ||
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r2273 | dbg.nospace() << "Domain(" << domain.m_minX << ',' << domain.m_maxX << ',' << domain.m_minY << ',' << domain.m_maxY << ')' << domain.m_size; | ||
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r222 | return dbg.maybeSpace(); | ||
| } | ||||
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r439 | #include "moc_domain_p.cpp" | ||
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Michal Klocek
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r131 | QTCOMMERCIALCHART_END_NAMESPACE | ||