| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the Qt Charts module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:GPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
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| ** GNU General Public License Usage |
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| ** General Public License version 3 or (at your option) any later version |
| ** approved by the KDE Free Qt Foundation. The licenses are as published by |
| ** the Free Software Foundation and appearing in the file LICENSE.GPL3 |
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| ****************************************************************************/ |
| |
| #include <QtCharts/qlogvalueaxis.h> |
| #include <QtCore/qmath.h> |
| #include <private/abstractchartlayout_p.h> |
| #include <private/chartpresenter_p.h> |
| #include <private/polarchartlogvalueaxisangular_p.h> |
| |
| QT_CHARTS_BEGIN_NAMESPACE |
| |
| PolarChartLogValueAxisAngular::PolarChartLogValueAxisAngular(QLogValueAxis *axis, |
| QGraphicsItem *item) |
| : PolarChartAxisAngular(axis, item) |
| { |
| QObject::connect(axis, SIGNAL(baseChanged(qreal)), this, SLOT(handleBaseChanged(qreal))); |
| QObject::connect(axis, SIGNAL(labelFormatChanged(QString)), |
| this, SLOT(handleLabelFormatChanged(QString))); |
| } |
| |
| PolarChartLogValueAxisAngular::~PolarChartLogValueAxisAngular() |
| { |
| } |
| |
| QVector<qreal> PolarChartLogValueAxisAngular::calculateLayout() const |
| { |
| QLogValueAxis *logValueAxis = qobject_cast<QLogValueAxis *>(axis()); |
| |
| QVector<qreal> points; |
| points.resize(logValueAxis->tickCount()); |
| |
| const qreal logMax = std::log10(logValueAxis->max()) / std::log10(logValueAxis->base()); |
| const qreal logMin = std::log10(logValueAxis->min()) / std::log10(logValueAxis->base()); |
| const qreal startEdge = qMin(logMin, logMax); |
| const qreal delta = 360.0 / qAbs(logMax - logMin); |
| const qreal initialSpan = (qCeil(startEdge) - startEdge) * delta; |
| |
| for (int i = 0; i < logValueAxis->tickCount(); ++i) |
| points[i] = initialSpan + (delta * qreal(i)); |
| |
| return points; |
| } |
| |
| void PolarChartLogValueAxisAngular::createAxisLabels(const QVector<qreal> &layout) |
| { |
| QLogValueAxis *logValueAxis = static_cast<QLogValueAxis *>(axis()); |
| setLabels(createLogValueLabels(logValueAxis->min(), |
| logValueAxis->max(), |
| logValueAxis->base(), |
| layout.size(), |
| logValueAxis->labelFormat())); |
| } |
| |
| void PolarChartLogValueAxisAngular::handleBaseChanged(qreal base) |
| { |
| Q_UNUSED(base); |
| QGraphicsLayoutItem::updateGeometry(); |
| if (presenter()) |
| presenter()->layout()->invalidate(); |
| } |
| |
| void PolarChartLogValueAxisAngular::handleLabelFormatChanged(const QString &format) |
| { |
| Q_UNUSED(format); |
| QGraphicsLayoutItem::updateGeometry(); |
| if (presenter()) |
| presenter()->layout()->invalidate(); |
| } |
| |
| QT_CHARTS_END_NAMESPACE |
| |
| #include "moc_polarchartlogvalueaxisangular_p.cpp" |