|
|
/****************************************************************************
|
|
|
**
|
|
|
** Copyright (C) 2014 Digia Plc
|
|
|
** All rights reserved.
|
|
|
** For any questions to Digia, please use contact form at http://qt.io
|
|
|
**
|
|
|
** This file is part of the Qt Charts module.
|
|
|
**
|
|
|
** Licensees holding valid commercial license for Qt may use this file in
|
|
|
** accordance with the Qt 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.io
|
|
|
**
|
|
|
****************************************************************************/
|
|
|
|
|
|
#include <private/chartlogvalueaxisx_p.h>
|
|
|
#include <private/chartpresenter_p.h>
|
|
|
#include <QtCharts/QLogValueAxis>
|
|
|
#include <private/abstractchartlayout_p.h>
|
|
|
#include <QtWidgets/QGraphicsLayout>
|
|
|
#include <QtCore/QtMath>
|
|
|
#include <QtCore/QDebug>
|
|
|
|
|
|
QT_CHARTS_BEGIN_NAMESPACE
|
|
|
|
|
|
ChartLogValueAxisX::ChartLogValueAxisX(QLogValueAxis *axis, QGraphicsItem *item)
|
|
|
: HorizontalAxis(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)));
|
|
|
}
|
|
|
|
|
|
ChartLogValueAxisX::~ChartLogValueAxisX()
|
|
|
{
|
|
|
}
|
|
|
|
|
|
QVector<qreal> ChartLogValueAxisX::calculateLayout() const
|
|
|
{
|
|
|
QVector<qreal> points;
|
|
|
|
|
|
qreal logMax = log10(m_axis->max()) / log10(m_axis->base());
|
|
|
qreal logMin = log10(m_axis->min()) / log10(m_axis->base());
|
|
|
qreal leftEdge = logMin < logMax ? logMin : logMax;
|
|
|
qreal ceilEdge = ceil(leftEdge);
|
|
|
int tickCount = qAbs(ceil(logMax) - ceil(logMin));
|
|
|
|
|
|
points.resize(tickCount + 1);
|
|
|
const QRectF &gridRect = gridGeometry();
|
|
|
const qreal deltaX = gridRect.width() / qAbs(logMax - logMin);
|
|
|
for (int i = 0; i <= tickCount; ++i)
|
|
|
points[i] = (ceilEdge + qreal(i)) * deltaX - leftEdge * deltaX + gridRect.left();
|
|
|
|
|
|
return points;
|
|
|
}
|
|
|
|
|
|
void ChartLogValueAxisX::updateGeometry()
|
|
|
{
|
|
|
const QVector<qreal>& layout = ChartAxisElement::layout();
|
|
|
if (layout.isEmpty())
|
|
|
return;
|
|
|
setLabels(createLogValueLabels(m_axis->min(), m_axis->max(), m_axis->base(), layout.size(), m_axis->labelFormat()));
|
|
|
HorizontalAxis::updateGeometry();
|
|
|
}
|
|
|
|
|
|
void ChartLogValueAxisX::handleBaseChanged(qreal base)
|
|
|
{
|
|
|
Q_UNUSED(base);
|
|
|
QGraphicsLayoutItem::updateGeometry();
|
|
|
if(presenter()) presenter()->layout()->invalidate();
|
|
|
}
|
|
|
|
|
|
void ChartLogValueAxisX::handleLabelFormatChanged(const QString &format)
|
|
|
{
|
|
|
Q_UNUSED(format);
|
|
|
QGraphicsLayoutItem::updateGeometry();
|
|
|
if(presenter()) presenter()->layout()->invalidate();
|
|
|
}
|
|
|
|
|
|
QSizeF ChartLogValueAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
|
|
|
{
|
|
|
Q_UNUSED(constraint)
|
|
|
|
|
|
QSizeF sh;
|
|
|
|
|
|
QSizeF base = HorizontalAxis::sizeHint(which, constraint);
|
|
|
QStringList ticksList;
|
|
|
qreal logMax = log10(m_axis->max()) / log10(m_axis->base());
|
|
|
qreal logMin = log10(m_axis->min()) / log10(m_axis->base());
|
|
|
int tickCount = qAbs(ceil(logMax) - ceil(logMin));
|
|
|
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(" "));
|
|
|
// Width of horizontal axis sizeHint indicates the maximum distance labels can extend past
|
|
|
// first and last ticks. Base width is irrelevant.
|
|
|
qreal width = 0;
|
|
|
qreal height = 0;
|
|
|
|
|
|
switch (which) {
|
|
|
case Qt::MinimumSize:{
|
|
|
QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(),
|
|
|
QStringLiteral("..."),
|
|
|
axis()->labelsAngle());
|
|
|
width = boundingRect.width() / 2.0;
|
|
|
height = boundingRect.height() + labelPadding() + base.height() + 1.0;
|
|
|
sh = QSizeF(width, height);
|
|
|
break;
|
|
|
}
|
|
|
case Qt::PreferredSize: {
|
|
|
qreal labelHeight = 0.0;
|
|
|
qreal firstWidth = -1.0;
|
|
|
foreach (const QString& s, ticksList) {
|
|
|
QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle());
|
|
|
labelHeight = qMax(rect.height(), labelHeight);
|
|
|
width = rect.width();
|
|
|
if (firstWidth < 0.0)
|
|
|
firstWidth = width;
|
|
|
}
|
|
|
height = labelHeight + labelPadding() + base.height() + 1.0;
|
|
|
width = qMax(width, firstWidth) / 2.0;
|
|
|
sh = QSizeF(width, height);
|
|
|
break;
|
|
|
}
|
|
|
default:
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
return sh;
|
|
|
}
|
|
|
|
|
|
#include "moc_chartlogvalueaxisx_p.cpp"
|
|
|
|
|
|
QT_CHARTS_END_NAMESPACE
|
|
|
|
