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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd
** All rights reserved.
** For any questions to The Qt Company, 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 The Qt Company.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.io
**
****************************************************************************/
#include <private/chartbarcategoryaxisy_p.h>
#include <private/chartpresenter_p.h>
#include <private/qbarcategoryaxis_p.h>
#include <private/abstractchartlayout_p.h>
#include <QtCore/QtMath>
#include <QtCore/QDebug>
QT_CHARTS_BEGIN_NAMESPACE
ChartBarCategoryAxisY::ChartBarCategoryAxisY(QBarCategoryAxis *axis, QGraphicsItem* item)
: VerticalAxis(axis, item, true),
m_categoriesAxis(axis)
{
QObject::connect( m_categoriesAxis,SIGNAL(categoriesChanged()),this, SLOT(handleCategoriesChanged()));
handleCategoriesChanged();
}
ChartBarCategoryAxisY::~ChartBarCategoryAxisY()
{
}
QVector<qreal> ChartBarCategoryAxisY::calculateLayout() const
{
QVector<qreal> points;
const QRectF& gridRect = gridGeometry();
qreal range = max() - min();
const qreal delta = gridRect.height() / range;
if (delta < 2)
return points;
qreal adjustedMin = min() + 0.5;
qreal offset = (qCeil(adjustedMin) - adjustedMin) * delta;
int count = qFloor(range);
if (count < 1)
return points;
points.resize(count + 2);
for (int i = 0; i < count + 2; ++i)
points[i] = gridRect.bottom() - (qreal(i) * delta) - offset;
return points;
}
QStringList ChartBarCategoryAxisY::createCategoryLabels(const QVector<qreal>& layout) const
{
QStringList result;
const QRectF &gridRect = gridGeometry();
qreal d = (max() - min()) / gridRect.height();
for (int i = 0; i < layout.count() - 1; ++i) {
qreal x = qFloor(((gridRect.height() - (layout[i + 1] + layout[i]) / 2 + gridRect.top()) * d + min() + 0.5));
if ((x < m_categoriesAxis->categories().count()) && (x >= 0)) {
result << m_categoriesAxis->categories().at(x);
} else {
// No label for x coordinate
result << QString();
}
}
result << QString();
return result;
}
void ChartBarCategoryAxisY::updateGeometry()
{
const QVector<qreal>& layout = ChartAxisElement::layout();
if (layout.isEmpty())
return;
setLabels(createCategoryLabels(layout));
VerticalAxis::updateGeometry();
}
void ChartBarCategoryAxisY::handleCategoriesChanged()
{
QGraphicsLayoutItem::updateGeometry();
if(presenter()) presenter()->layout()->invalidate();
}
QSizeF ChartBarCategoryAxisY::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
Q_UNUSED(constraint)
QSizeF sh;
QSizeF base = VerticalAxis::sizeHint(which, constraint);
QStringList ticksList = m_categoriesAxis->categories();
qreal width = 0;
qreal height = 0; // Height is irrelevant for Y axes with interval labels
switch (which) {
case Qt::MinimumSize: {
QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(),
QStringLiteral("..."),
axis()->labelsAngle());
width = boundingRect.width() + labelPadding() + base.width() + 1.0;
if (base.width() > 0.0)
width += labelPadding();
sh = QSizeF(width, height);
break;
}
case Qt::PreferredSize:{
qreal labelWidth = 0.0;
foreach (const QString& s, ticksList) {
QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle());
labelWidth = qMax(rect.width(), labelWidth);
}
width = labelWidth + labelPadding() + base.width() + 1.0;
if (base.width() > 0.0)
width += labelPadding();
sh = QSizeF(width, height);
break;
}
default:
break;
}
return sh;
}
#include "moc_chartbarcategoryaxisy_p.cpp"
QT_CHARTS_END_NAMESPACE
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