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/****************************************************************************
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**
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** Copyright (C) 2014 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.digia.com
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**
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** This file is part of the Qt Enterprise Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Enterprise licenses may use this file in
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** accordance with the Qt Enterprise License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.digia.com
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "chartview.h"
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#include <QtCore/QtMath>
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#include <QtCore/QDebug>
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QT_CHARTS_USE_NAMESPACE
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ChartView::ChartView(QWidget *parent)
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: QChartView(new QChart(), parent),
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m_scatter(0),
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m_scatter2(0)
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{
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setRenderHint(QPainter::Antialiasing);
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chart()->setTitle("Click to interact with scatter points");
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m_scatter = new QScatterSeries();
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m_scatter->setName("scatter1");
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for (qreal x(0.5); x <= 4.0; x += 0.5) {
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for (qreal y(0.5); y <= 4.0; y += 0.5) {
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*m_scatter << QPointF(x, y);
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}
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}
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m_scatter2 = new QScatterSeries();
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m_scatter2->setName("scatter2");
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chart()->addSeries(m_scatter2);
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chart()->addSeries(m_scatter);
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chart()->createDefaultAxes();
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chart()->axisX()->setRange(0, 4.5);
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chart()->axisY()->setRange(0, 4.5);
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connect(m_scatter, SIGNAL(clicked(QPointF)), this, SLOT(handleClickedPoint(QPointF)));
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}
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ChartView::~ChartView()
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{
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}
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void ChartView::handleClickedPoint(const QPointF &point)
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{
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QPointF clickedPoint = point;
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// Find the closest point from series 1
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QPointF closest(INT_MAX, INT_MAX);
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qreal distance(INT_MAX);
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foreach (QPointF currentPoint, m_scatter->points()) {
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qreal currentDistance = qSqrt((currentPoint.x() - clickedPoint.x())
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* (currentPoint.x() - clickedPoint.x())
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+ (currentPoint.y() - clickedPoint.y())
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* (currentPoint.y() - clickedPoint.y()));
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if (currentDistance < distance) {
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distance = currentDistance;
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closest = currentPoint;
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}
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}
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// Remove the closes point from series 1 and append it to series 2
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m_scatter->remove(closest);
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m_scatter2->append(closest);
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}
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