|
|
/******************************************************************************
|
|
|
**
|
|
|
** Copyright (C) 2015 The Qt Company Ltd.
|
|
|
** Contact: http://www.qt.io/licensing/
|
|
|
**
|
|
|
** This file is part of the Qt Charts module.
|
|
|
**
|
|
|
** $QT_BEGIN_LICENSE:COMM$
|
|
|
**
|
|
|
** 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 http://www.qt.io/terms-conditions. For further
|
|
|
** information use the contact form at http://www.qt.io/contact-us.
|
|
|
**
|
|
|
** $QT_END_LICENSE$
|
|
|
**
|
|
|
******************************************************************************/
|
|
|
|
|
|
#include <private/chartlogvalueaxisy_p.h>
|
|
|
#include <private/chartpresenter_p.h>
|
|
|
#include <QtCharts/QLogValueAxis>
|
|
|
#include <private/abstractchartlayout_p.h>
|
|
|
#include <QtWidgets/QGraphicsLayout>
|
|
|
#include <QtCore/QtMath>
|
|
|
#include <QtCore/QDebug>
|
|
|
#include <cmath>
|
|
|
|
|
|
QT_CHARTS_BEGIN_NAMESPACE
|
|
|
|
|
|
ChartLogValueAxisY::ChartLogValueAxisY(QLogValueAxis *axis, QGraphicsItem *item)
|
|
|
: VerticalAxis(axis, item),
|
|
|
m_axis(axis)
|
|
|
{
|
|
|
QObject::connect(m_axis, SIGNAL(baseChanged(qreal)), this, SLOT(handleBaseChanged(qreal)));
|
|
|
QObject::connect(m_axis, SIGNAL(labelFormatChanged(QString)), this, SLOT(handleLabelFormatChanged(QString)));
|
|
|
}
|
|
|
|
|
|
ChartLogValueAxisY::~ChartLogValueAxisY()
|
|
|
{
|
|
|
}
|
|
|
|
|
|
QVector<qreal> ChartLogValueAxisY::calculateLayout() const
|
|
|
{
|
|
|
QVector<qreal> points;
|
|
|
qreal logMax = std::log10(m_axis->max()) / std::log10(m_axis->base());
|
|
|
qreal logMin = std::log10(m_axis->min()) / std::log10(m_axis->base());
|
|
|
qreal leftEdge = logMin < logMax ? logMin : logMax;
|
|
|
qreal ceilEdge = qCeil(leftEdge);
|
|
|
int tickCount = qAbs(qCeil(logMax) - qCeil(logMin));
|
|
|
|
|
|
// If the high edge sits exactly on the tick value, add a tick
|
|
|
qreal highValue = logMin < logMax ? logMax : logMin;
|
|
|
if (qFuzzyCompare(highValue, qreal(qCeil(highValue))))
|
|
|
tickCount++;
|
|
|
|
|
|
points.resize(tickCount);
|
|
|
const QRectF &gridRect = gridGeometry();
|
|
|
const qreal deltaY = gridRect.height() / qAbs(logMax - logMin);
|
|
|
for (int i = 0; i < tickCount; ++i)
|
|
|
points[i] = (ceilEdge + qreal(i)) * -deltaY - leftEdge * -deltaY + gridRect.bottom();
|
|
|
|
|
|
return points;
|
|
|
}
|
|
|
|
|
|
|
|
|
void ChartLogValueAxisY::updateGeometry()
|
|
|
{
|
|
|
const QVector<qreal> &layout = ChartAxisElement::layout();
|
|
|
setLabels(createLogValueLabels(m_axis->min(), m_axis->max(), m_axis->base(), layout.size(), m_axis->labelFormat()));
|
|
|
VerticalAxis::updateGeometry();
|
|
|
}
|
|
|
|
|
|
void ChartLogValueAxisY::handleBaseChanged(qreal base)
|
|
|
{
|
|
|
Q_UNUSED(base);
|
|
|
QGraphicsLayoutItem::updateGeometry();
|
|
|
if(presenter()) presenter()->layout()->invalidate();
|
|
|
}
|
|
|
|
|
|
void ChartLogValueAxisY::handleLabelFormatChanged(const QString &format)
|
|
|
{
|
|
|
Q_UNUSED(format);
|
|
|
QGraphicsLayoutItem::updateGeometry();
|
|
|
if(presenter()) presenter()->layout()->invalidate();
|
|
|
}
|
|
|
|
|
|
QSizeF ChartLogValueAxisY::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
|
|
|
{
|
|
|
Q_UNUSED(constraint)
|
|
|
|
|
|
QSizeF sh;
|
|
|
|
|
|
QSizeF base = VerticalAxis::sizeHint(which, constraint);
|
|
|
QStringList ticksList;
|
|
|
qreal logMax = std::log10(m_axis->max()) / std::log10(m_axis->base());
|
|
|
qreal logMin = std::log10(m_axis->min()) / std::log10(m_axis->base());
|
|
|
int tickCount = qAbs(qCeil(logMax) - qCeil(logMin));
|
|
|
|
|
|
// If the high edge sits exactly on the tick value, add a tick
|
|
|
qreal highValue = logMin < logMax ? logMax : logMin;
|
|
|
if (qFuzzyCompare(highValue, qreal(qCeil(highValue))))
|
|
|
tickCount++;
|
|
|
|
|
|
if (m_axis->max() > m_axis->min() && tickCount > 0)
|
|
|
ticksList = createLogValueLabels(m_axis->min(), m_axis->max(), m_axis->base(), tickCount, m_axis->labelFormat());
|
|
|
else
|
|
|
ticksList.append(QStringLiteral(" "));
|
|
|
qreal width = 0;
|
|
|
// Height of vertical axis sizeHint indicates the maximum distance labels can extend past
|
|
|
// first and last ticks. Base height is irrelevant.
|
|
|
qreal height = 0;
|
|
|
|
|
|
switch (which) {
|
|
|
case Qt::MinimumSize: {
|
|
|
QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(),
|
|
|
QStringLiteral("..."),
|
|
|
axis()->labelsAngle());
|
|
|
width = boundingRect.width() + labelPadding() + base.width() + 1.0;
|
|
|
height = boundingRect.height() / 2.0;
|
|
|
sh = QSizeF(width, height);
|
|
|
break;
|
|
|
}
|
|
|
case Qt::PreferredSize: {
|
|
|
qreal labelWidth = 0.0;
|
|
|
qreal firstHeight = -1.0;
|
|
|
foreach (const QString& s, ticksList) {
|
|
|
QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle());
|
|
|
labelWidth = qMax(rect.width(), labelWidth);
|
|
|
height = rect.height();
|
|
|
if (firstHeight < 0.0)
|
|
|
firstHeight = height;
|
|
|
}
|
|
|
width = labelWidth + labelPadding() + base.width() + 2.0; //two pixels of tolerance
|
|
|
height = qMax(height, firstHeight) / 2.0;
|
|
|
sh = QSizeF(width, height);
|
|
|
break;
|
|
|
}
|
|
|
default:
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
return sh;
|
|
|
}
|
|
|
|
|
|
#include "moc_chartlogvalueaxisy_p.cpp"
|
|
|
|
|
|
QT_CHARTS_END_NAMESPACE
|
|
|
|