diff options
Diffstat (limited to 'src/charts/axis/logvalueaxis/polarchartlogvalueaxisradial.cpp')
-rw-r--r-- | src/charts/axis/logvalueaxis/polarchartlogvalueaxisradial.cpp | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/charts/axis/logvalueaxis/polarchartlogvalueaxisradial.cpp b/src/charts/axis/logvalueaxis/polarchartlogvalueaxisradial.cpp new file mode 100644 index 00000000..3c0d01b3 --- /dev/null +++ b/src/charts/axis/logvalueaxis/polarchartlogvalueaxisradial.cpp @@ -0,0 +1,95 @@ +/**************************************************************************** +** +** 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 "polarchartlogvalueaxisradial_p.h" +#include "abstractchartlayout_p.h" +#include "chartpresenter_p.h" +#include "qlogvalueaxis.h" +#include <qmath.h> +#include <QDebug> + +QT_CHARTS_BEGIN_NAMESPACE + +PolarChartLogValueAxisRadial::PolarChartLogValueAxisRadial(QLogValueAxis *axis, QGraphicsItem *item) + : PolarChartAxisRadial(axis, item) +{ + QObject::connect(axis, SIGNAL(baseChanged(qreal)), this, SLOT(handleBaseChanged(qreal))); + QObject::connect(axis, SIGNAL(labelFormatChanged(QString)), this, SLOT(handleLabelFormatChanged(QString))); +} + +PolarChartLogValueAxisRadial::~PolarChartLogValueAxisRadial() +{ +} + +QVector<qreal> PolarChartLogValueAxisRadial::calculateLayout() const +{ + QLogValueAxis *logValueAxis = static_cast<QLogValueAxis *>(axis()); + const qreal logMax = log10(logValueAxis->max()) / log10(logValueAxis->base()); + const qreal logMin = log10(logValueAxis->min()) / log10(logValueAxis->base()); + const qreal innerEdge = logMin < logMax ? logMin : logMax; + const qreal outerEdge = logMin > logMax ? logMin : logMax; + const qreal delta = (axisGeometry().width() / 2.0) / qAbs(logMax - logMin); + const qreal initialSpan = (ceil(innerEdge) - innerEdge) * delta; + int tickCount = qAbs(ceil(logMax) - ceil(logMin)); + + // Extra tick if outer edge is exactly at the tick + if (outerEdge == ceil(outerEdge)) + tickCount++; + + QVector<qreal> points; + points.resize(tickCount); + + for (int i = 0; i < tickCount; ++i) { + qreal radialCoordinate = initialSpan + (delta * qreal(i)); + points[i] = radialCoordinate; + } + + return points; +} + +void PolarChartLogValueAxisRadial::createAxisLabels(const QVector<qreal> &layout) +{ + QLogValueAxis *logValueAxis = static_cast<QLogValueAxis *>(axis()); + setLabels(createLogValueLabels(logValueAxis->min(), + logValueAxis->max(), + logValueAxis->base(), + layout.size(), + logValueAxis->labelFormat())); +} + +void PolarChartLogValueAxisRadial::handleBaseChanged(qreal base) +{ + Q_UNUSED(base); + QGraphicsLayoutItem::updateGeometry(); + if (presenter()) + presenter()->layout()->invalidate(); +} + +void PolarChartLogValueAxisRadial::handleLabelFormatChanged(const QString &format) +{ + Q_UNUSED(format); + QGraphicsLayoutItem::updateGeometry(); + if (presenter()) + presenter()->layout()->invalidate(); +} + +#include "moc_polarchartlogvalueaxisradial_p.cpp" + +QT_CHARTS_END_NAMESPACE |