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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <private/chartbarcategoryaxisx_p.h>
#include <private/chartpresenter_p.h>
#include <private/qbarcategoryaxis_p.h>
#include <private/abstractchartlayout_p.h>
#include <QtCore/QDebug>
#include <QtCore/QtMath>
QT_BEGIN_NAMESPACE
ChartBarCategoryAxisX::ChartBarCategoryAxisX(QBarCategoryAxis *axis, QGraphicsItem* item)
: HorizontalAxis(axis, item, true),
m_categoriesAxis(axis)
{
QObject::connect(m_categoriesAxis,SIGNAL(categoriesChanged()),this, SLOT(handleCategoriesChanged()));
handleCategoriesChanged();
}
ChartBarCategoryAxisX::~ChartBarCategoryAxisX()
{
}
QList<qreal> ChartBarCategoryAxisX::calculateLayout() const
{
QList<qreal> points;
const QRectF& gridRect = gridGeometry();
qreal range = max() - min();
const qreal delta = gridRect.width() / range;
if (delta < 2)
return points;
qreal adjustedMin = min() + 0.5;
qreal offset = (qRound(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] = offset + (qreal(i) * delta) + gridRect.left();
return points;
}
QStringList ChartBarCategoryAxisX::createCategoryLabels(const QList<qreal> &layout) const
{
QStringList result ;
const QRectF &gridRect = gridGeometry();
const qreal d = (max() - min()) / gridRect.width();
for (int i = 0; i < layout.size() - 1; ++i) {
int x = qFloor((((layout[i] + layout[i + 1]) / 2 - gridRect.left()) * d + min() + 0.5));
if (x < max() && (x >= 0) && x < m_categoriesAxis->categories().size()) {
result << m_categoriesAxis->categories().at(x);
} else {
// No label for x coordinate
result << QString();
}
}
result << QString();
return result;
}
void ChartBarCategoryAxisX::updateGeometry()
{
const QList<qreal> &layout = ChartAxisElement::layout();
if (layout.isEmpty())
return;
setLabels(createCategoryLabels(layout));
HorizontalAxis::updateGeometry();
}
void ChartBarCategoryAxisX::handleCategoriesChanged()
{
QGraphicsLayoutItem::updateGeometry();
if(presenter()) presenter()->layout()->invalidate();
}
QSizeF ChartBarCategoryAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
Q_UNUSED(constraint);
QSizeF sh;
QSizeF base = HorizontalAxis::sizeHint(which, constraint);
const QStringList ticksList = m_categoriesAxis->categories();
qreal width = 0; // Width is irrelevant for X axes with interval labels
qreal height = 0;
switch (which) {
case Qt::MinimumSize: {
if (labelsVisible()) {
QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(),
QStringLiteral("..."),
axis()->labelsAngle());
height = boundingRect.height() + labelPadding() + base.height() + 1.0;
} else {
height = base.height() + 1.0;
}
sh = QSizeF(width, height);
break;
}
case Qt::PreferredSize:{
if (labelsVisible()) {
qreal labelHeight = 0.0;
for (const QString &s : ticksList) {
QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle());
labelHeight = qMax(rect.height(), labelHeight);
}
height = labelHeight + labelPadding() + base.height() + 1.0;
} else {
height = base.height() + 1.0;
}
sh = QSizeF(width, height);
break;
}
default:
break;
}
return sh;
}
QT_END_NAMESPACE
#include "moc_chartbarcategoryaxisx_p.cpp"
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