polarchartlogvalueaxisangular.cpp
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CppLexer
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r0 | /**************************************************************************** | ||
** | ||||
** 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 | ||||
** Software or, alternatively, in accordance with the terms contained in | ||||
** a written agreement between you and The Qt Company. For licensing terms | ||||
** and conditions see https://www.qt.io/terms-conditions. For further | ||||
** information use the contact form at https://www.qt.io/contact-us. | ||||
** | ||||
** GNU General Public License Usage | ||||
** Alternatively, this file may be used under the terms of the GNU | ||||
** 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 | ||||
** included in the packaging of this file. Please review the following | ||||
** information to ensure the GNU General Public License requirements will | ||||
** be met: https://www.gnu.org/licenses/gpl-3.0.html. | ||||
** | ||||
** $QT_END_LICENSE$ | ||||
** | ||||
****************************************************************************/ | ||||
#include <private/polarchartlogvalueaxisangular_p.h> | ||||
#include <private/abstractchartlayout_p.h> | ||||
#include <private/chartpresenter_p.h> | ||||
#include <QtCharts/QLogValueAxis> | ||||
#include <QtCore/QtMath> | ||||
#include <QtCore/QDebug> | ||||
#include <cmath> | ||||
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 = static_cast<QLogValueAxis *>(axis()); | ||||
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 = logMin < logMax ? logMin : logMax; | ||||
const qreal delta = 360.0 / qAbs(logMax - logMin); | ||||
const qreal initialSpan = (qCeil(startEdge) - startEdge) * delta; | ||||
int tickCount = qAbs(qCeil(logMax) - qCeil(logMin)); | ||||
QVector<qreal> points; | ||||
points.resize(tickCount); | ||||
for (int i = 0; i < tickCount; ++i) { | ||||
qreal angularCoordinate = initialSpan + (delta * qreal(i)); | ||||
points[i] = angularCoordinate; | ||||
} | ||||
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(); | ||||
} | ||||
#include "moc_polarchartlogvalueaxisangular_p.cpp" | ||||
QT_CHARTS_END_NAMESPACE | ||||