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/****************************************************************************
**
** 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 <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);
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
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