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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Charts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "chartview.h"
#include <QtCore/QtMath>
#include <QtCore/QDebug>
QT_CHARTS_USE_NAMESPACE
ChartView::ChartView(QWidget *parent)
: QChartView(new QChart(), parent),
m_scatter(0),
m_scatter2(0)
{
setRenderHint(QPainter::Antialiasing);
chart()->setTitle("Click to interact with scatter points");
m_scatter = new QScatterSeries();
m_scatter->setName("scatter1");
for (qreal x(0.5); x <= 4.0; x += 0.5) {
for (qreal y(0.5); y <= 4.0; y += 0.5)
*m_scatter << QPointF(x, y);
}
m_scatter2 = new QScatterSeries();
m_scatter2->setName("scatter2");
chart()->addSeries(m_scatter2);
chart()->addSeries(m_scatter);
chart()->createDefaultAxes();
chart()->axes(Qt::Horizontal).first()->setRange(0, 4.5);
chart()->axes(Qt::Vertical).first()->setRange(0, 4.5);
connect(m_scatter, &QScatterSeries::clicked, this, &ChartView::handleClickedPoint);
}
ChartView::~ChartView()
{
}
void ChartView::handleClickedPoint(const QPointF &point)
{
QPointF clickedPoint = point;
// Find the closest point from series 1
QPointF closest(INT_MAX, INT_MAX);
qreal distance(INT_MAX);
const auto points = m_scatter->points();
for (const QPointF ¤tPoint : points) {
qreal currentDistance = qSqrt((currentPoint.x() - clickedPoint.x())
* (currentPoint.x() - clickedPoint.x())
+ (currentPoint.y() - clickedPoint.y())
* (currentPoint.y() - clickedPoint.y()));
if (currentDistance < distance) {
distance = currentDistance;
closest = currentPoint;
}
}
// Remove the closes point from series 1 and append it to series 2
m_scatter->remove(closest);
m_scatter2->append(closest);
}
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