1 files changed, 245 insertions, 0 deletions
diff --git a/src/charts/domain/logxydomain.cpp b/src/charts/domain/logxydomain.cpp
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+++ b/src/charts/domain/logxydomain.cpp
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+/****************************************************************************
+**
+** 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 "logxydomain_p.h"
+#include "qabstractaxis_p.h"
+#include "qlogvalueaxis.h"
+#include <qmath.h>
+
+QT_CHARTS_BEGIN_NAMESPACE
+
+LogXYDomain::LogXYDomain(QObject *parent)
+    : AbstractDomain(parent),
+      m_logLeftX(0),
+      m_logRightX(1),
+      m_logBaseX(10)
+{
+}
+
+LogXYDomain::~LogXYDomain()
+{
+}
+
+void LogXYDomain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY)
+{
+    bool axisXChanged = false;
+    bool axisYChanged = false;
+
+    adjustLogDomainRanges(minX, maxX);
+
+    if (!qFuzzyCompare(m_minX, minX) || !qFuzzyCompare(m_maxX, maxX)) {
+        m_minX = minX;
+        m_maxX = maxX;
+        axisXChanged = true;
+        qreal logMinX = log10(m_minX) / log10(m_logBaseX);
+        qreal logMaxX = log10(m_maxX) / log10(m_logBaseX);
+        m_logLeftX = logMinX < logMaxX ? logMinX : logMaxX;
+        m_logRightX = logMinX > logMaxX ? logMinX : logMaxX;
+        if(!m_signalsBlocked)
+            emit rangeHorizontalChanged(m_minX, m_maxX);
+    }
+
+    if (!qFuzzyIsNull(m_minY - minY) || !qFuzzyIsNull(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 LogXYDomain::zoomIn(const QRectF &rect)
+{
+    storeZoomReset();
+    qreal logLeftX = rect.left() * (m_logRightX - m_logLeftX) / m_size.width() + m_logLeftX;
+    qreal logRightX = rect.right() * (m_logRightX - m_logLeftX) / m_size.width() + m_logLeftX;
+    qreal leftX = qPow(m_logBaseX, logLeftX);
+    qreal rightX = qPow(m_logBaseX, logRightX);
+    qreal minX = leftX < rightX ? leftX : rightX;
+    qreal maxX = leftX > rightX ? leftX : rightX;
+
+    qreal dy = spanY() / m_size.height();
+    qreal minY = m_minY;
+    qreal maxY = m_maxY;
+
+    minY = maxY - dy * rect.bottom();
+    maxY = maxY - dy * rect.top();
+
+    setRange(minX, maxX, minY, maxY);
+}
+
+void LogXYDomain::zoomOut(const QRectF &rect)
+{
+    storeZoomReset();
+    const qreal factorX = m_size.width() / rect.width();
+
+    qreal logLeftX = m_logLeftX + (m_logRightX - m_logLeftX) / 2 * (1 - factorX);
+    qreal logRIghtX = m_logLeftX + (m_logRightX - m_logLeftX) / 2 * (1 + factorX);
+    qreal leftX = qPow(m_logBaseX, logLeftX);
+    qreal rightX = qPow(m_logBaseX, logRIghtX);
+    qreal minX = leftX < rightX ? leftX : rightX;
+    qreal maxX = leftX > rightX ? leftX : rightX;
+
+    qreal dy = spanY() / rect.height();
+    qreal minY = m_minY;
+    qreal maxY = m_maxY;
+
+    maxY = minY + dy * rect.bottom();
+    minY = maxY - dy * m_size.height();
+
+    setRange(minX, maxX, minY, maxY);
+}
+
+void LogXYDomain::move(qreal dx, qreal dy)
+{
+    qreal stepX = dx * (m_logRightX - m_logLeftX) / m_size.width();
+    qreal leftX = qPow(m_logBaseX, m_logLeftX + stepX);
+    qreal rightX = qPow(m_logBaseX, m_logRightX + stepX);
+    qreal minX = leftX < rightX ? leftX : rightX;
+    qreal maxX = leftX > rightX ? leftX : rightX;
+
+    qreal y = spanY() / m_size.height();
+    qreal minY = m_minY;
+    qreal maxY = m_maxY;
+
+    if (dy != 0) {
+        minY = minY + y * dy;
+        maxY = maxY + y * dy;
+    }
+    setRange(minX, maxX, minY, maxY);
+}
+
+QPointF LogXYDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const
+{
+    const qreal deltaX = m_size.width() / (m_logRightX - m_logLeftX);
+    const qreal deltaY = m_size.height() / (m_maxY - m_minY);
+
+    qreal x(0);
+    qreal y = (point.y() - m_minY) * -deltaY + m_size.height();
+    if (point.x() > 0) {
+        x = (log10(point.x()) / log10(m_logBaseX)) * deltaX - m_logLeftX * deltaX;
+        ok = true;
+    } else {
+        x = 0;
+        qWarning() << "Logarithms of zero and negative values are undefined.";
+        ok = false;
+    }
+    return QPointF(x, y);
+}
+
+QVector<QPointF> LogXYDomain::calculateGeometryPoints(const QList<QPointF> &vector) const
+{
+    const qreal deltaX = m_size.width() / (m_logRightX - m_logLeftX);
+    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) {
+        if (vector[i].x() > 0) {
+            qreal x = (log10(vector[i].x()) / log10(m_logBaseX)) * deltaX - m_logLeftX * deltaX;
+            qreal y = (vector[i].y() - m_minY) * -deltaY + m_size.height();
+            result[i].setX(x);
+            result[i].setY(y);
+        } else {
+            qWarning() << "Logarithms of zero and negative values are undefined.";
+            return QVector<QPointF>();
+        }
+
+    }
+    return result;
+}
+
+QPointF LogXYDomain::calculateDomainPoint(const QPointF &point) const
+{
+    const qreal deltaX = m_size.width() / (m_logRightX - m_logLeftX);
+    const qreal deltaY = m_size.height() / (m_maxY - m_minY);
+    qreal x = qPow(m_logBaseX, m_logLeftX + point.x() / deltaX);
+    qreal y = (point.y() - m_size.height()) / (-deltaY) + m_minY;
+    return QPointF(x, y);
+}
+
+bool LogXYDomain::attachAxis(QAbstractAxis *axis)
+{
+    AbstractDomain::attachAxis(axis);
+    QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis);
+
+    if (logAxis && logAxis->orientation() == Qt::Horizontal) {
+        QObject::connect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal)));
+        handleHorizontalAxisBaseChanged(logAxis->base());
+    }
+
+    return true;
+}
+
+bool LogXYDomain::detachAxis(QAbstractAxis *axis)
+{
+    AbstractDomain::detachAxis(axis);
+    QLogValueAxis *logAxis = qobject_cast<QLogValueAxis *>(axis);
+
+    if (logAxis && logAxis->orientation() == Qt::Horizontal)
+        QObject::disconnect(logAxis, SIGNAL(baseChanged(qreal)), this, SLOT(handleHorizontalAxisBaseChanged(qreal)));
+
+    return true;
+}
+
+void LogXYDomain::handleHorizontalAxisBaseChanged(qreal baseX)
+{
+    m_logBaseX = baseX;
+    qreal logMinX = log10(m_minX) / log10(m_logBaseX);
+    qreal logMaxX = log10(m_maxX) / log10(m_logBaseX);
+    m_logLeftX = logMinX < logMaxX ? logMinX : logMaxX;
+    m_logRightX = logMinX > logMaxX ? logMinX : logMaxX;
+    emit updated();
+}
+
+// operators
+
+bool QT_CHARTS_AUTOTEST_EXPORT operator== (const LogXYDomain &domain1, const LogXYDomain &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 LogXYDomain &domain1, const LogXYDomain &domain2)
+{
+    return !(domain1 == domain2);
+}
+
+
+QDebug QT_CHARTS_AUTOTEST_EXPORT operator<<(QDebug dbg, const LogXYDomain &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_logxydomain_p.cpp"
+
+QT_CHARTS_END_NAMESPACE