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/****************************************************************************
**
** Copyright (C) 2013 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 Commercial Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial 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 "chartcategoryaxisx_p.h"
#include "qcategoryaxis.h"
#include "qabstractaxis.h"
#include "chartpresenter_p.h"
#include <QGraphicsLayout>
#include <QFontMetrics>
#include <qmath.h>
QTCOMMERCIALCHART_BEGIN_NAMESPACE
ChartCategoryAxisX::ChartCategoryAxisX(QCategoryAxis *axis, QGraphicsItem* item)
: HorizontalAxis(axis, item, true),
m_axis(axis)
{
}
ChartCategoryAxisX::~ChartCategoryAxisX()
{
}
QVector<qreal> ChartCategoryAxisX::calculateLayout() const
{
int tickCount = m_axis->categoriesLabels().count() + 1;
QVector<qreal> points;
if (tickCount < 2)
return points;
const QRectF &gridRect = gridGeometry();
qreal range = max() - min();
if (range > 0) {
points.resize(tickCount);
qreal scale = gridRect.width() / range;
for (int i = 0; i < tickCount; ++i) {
if (i < tickCount - 1) {
qreal x = (m_axis->startValue(m_axis->categoriesLabels().at(i)) - min()) * scale + gridRect.left();
points[i] = x;
} else {
qreal x = (m_axis->endValue(m_axis->categoriesLabels().at(i - 1)) - min()) * scale + gridRect.left();
points[i] = x;
}
}
}
return points;
}
void ChartCategoryAxisX::updateGeometry()
{
setLabels(m_axis->categoriesLabels() << "");
HorizontalAxis::updateGeometry();
}
void ChartCategoryAxisX::handleAxisUpdated()
{
updateGeometry();
}
QSizeF ChartCategoryAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
Q_UNUSED(constraint)
QFontMetrics fn(font());
QSizeF sh;
QSizeF base = HorizontalAxis::sizeHint(which, constraint);
QStringList ticksList = m_axis->categoriesLabels();
qreal width = 0; // Width is irrelevant for X axes with interval labels
qreal height = 0;
switch (which) {
case Qt::MinimumSize: {
QRectF boundingRect = labelBoundingRect(fn, "...");
height = boundingRect.height() + labelPadding();
height += base.height();
sh = QSizeF(width, height);
break;
}
case Qt::PreferredSize: {
int labelHeight = 0;
foreach (const QString& s, ticksList) {
QRect rect = labelBoundingRect(fn, s);
labelHeight = qMax(rect.height(), labelHeight);
}
height = labelHeight + labelPadding();
height += base.height();
sh = QSizeF(width, height);
break;
}
default:
break;
}
return sh;
}
QTCOMMERCIALCHART_END_NAMESPACE
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