| /**************************************************************************** |
| ** |
| ** 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); |
| } |