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Diffstat (limited to 'src/charts/domain/xypolardomain.cpp')
| -rw-r--r-- | src/charts/domain/xypolardomain.cpp | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/charts/domain/xypolardomain.cpp b/src/charts/domain/xypolardomain.cpp new file mode 100644 index 00000000..30fdacd3 --- /dev/null +++ b/src/charts/domain/xypolardomain.cpp @@ -0,0 +1,184 @@ +/**************************************************************************** +** +** 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 "xypolardomain_p.h" +#include "qabstractaxis_p.h" +#include <qmath.h> + +QT_CHARTS_BEGIN_NAMESPACE + +XYPolarDomain::XYPolarDomain(QObject *parent) + : PolarDomain(parent) +{ +} + +XYPolarDomain::~XYPolarDomain() +{ +} + +void XYPolarDomain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY) +{ + bool axisXChanged = false; + bool axisYChanged = false; + + if (!qFuzzyCompare(m_minX, minX) || !qFuzzyCompare(m_maxX, maxX)) { + m_minX = minX; + m_maxX = maxX; + axisXChanged = true; + if (!m_signalsBlocked) + emit rangeHorizontalChanged(m_minX, m_maxX); + } + + if (!qFuzzyCompare(m_minY, minY) || !qFuzzyCompare(m_maxY, maxY)) { + m_minY = minY; + m_maxY = maxY; + axisYChanged = true; + if (!m_signalsBlocked) + emit rangeVerticalChanged(m_minY, m_maxY); + } + + if (axisXChanged || axisYChanged) + emit updated(); +} + + +void XYPolarDomain::zoomIn(const QRectF &rect) +{ + storeZoomReset(); + qreal dx = spanX() / m_size.width(); + qreal dy = spanY() / m_size.height(); + + qreal maxX = m_maxX; + qreal minX = m_minX; + qreal minY = m_minY; + qreal maxY = m_maxY; + + maxX = minX + dx * rect.right(); + minX = minX + dx * rect.left(); + minY = maxY - dy * rect.bottom(); + maxY = maxY - dy * rect.top(); + + setRange(minX, maxX, minY, maxY); +} + +void XYPolarDomain::zoomOut(const QRectF &rect) +{ + storeZoomReset(); + qreal dx = spanX() / rect.width(); + qreal dy = spanY() / rect.height(); + + qreal maxX = m_maxX; + qreal minX = m_minX; + qreal minY = m_minY; + qreal maxY = m_maxY; + + minX = maxX - dx * rect.right(); + maxX = minX + dx * m_size.width(); + maxY = minY + dy * rect.bottom(); + minY = maxY - dy * m_size.height(); + + setRange(minX, maxX, minY, maxY); +} + +void XYPolarDomain::move(qreal dx, qreal dy) +{ + // One unit scrolls one degree angular and one pixel radial + qreal x = spanX() / 360.0; + qreal y = spanY() / m_radius; + + qreal maxX = m_maxX; + qreal minX = m_minX; + qreal minY = m_minY; + qreal maxY = m_maxY; + + if (dx != 0) { + minX = minX + x * dx; + maxX = maxX + x * dx; + } + if (dy != 0) { + minY = minY + y * dy; + maxY = maxY + y * dy; + } + setRange(minX, maxX, minY, maxY); +} + +QPointF XYPolarDomain::calculateDomainPoint(const QPointF &point) const +{ + if (point == m_center) + return QPointF(0.0, m_minX); + + QLineF line(m_center, point); + qreal a = 90.0 - line.angle(); + if (a < 0.0) + a += 360.0; + a = ((a / 360.0) * (m_maxX - m_minX)) + m_minX; + qreal r = m_minY + ((m_maxY - m_minY) * (line.length() / m_radius)); + return QPointF(a, r); +} + +qreal XYPolarDomain::toAngularCoordinate(qreal value, bool &ok) const +{ + ok = true; + qreal f = (value - m_minX) / (m_maxX - m_minX); + return f * 360.0; +} + +qreal XYPolarDomain::toRadialCoordinate(qreal value, bool &ok) const +{ + ok = true; + if (value < m_minY) + value = m_minY; + + // Dont limit the max. The drawing should clip the stuff that goes out of the grid + qreal f = (value - m_minY) / (m_maxY - m_minY); + + return f * m_radius; +} + +// operators + +bool QT_CHARTS_AUTOTEST_EXPORT operator== (const XYPolarDomain &domain1, const XYPolarDomain &domain2) +{ + 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)); +} + + +bool QT_CHARTS_AUTOTEST_EXPORT operator!= (const XYPolarDomain &domain1, const XYPolarDomain &domain2) +{ + return !(domain1 == domain2); +} + + +QDebug QT_CHARTS_AUTOTEST_EXPORT operator<<(QDebug dbg, const XYPolarDomain &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(); +} + +#include "moc_xypolardomain_p.cpp" + +QT_CHARTS_END_NAMESPACE |