chartview.cpp
79 lines
| 2.5 KiB
| text/x-c
|
CppLexer
Jani Honkonen
|
r830 | /**************************************************************************** | ||
** | ||||
Titta Heikkala
|
r2688 | ** Copyright (C) 2014 Digia Plc | ||
Jani Honkonen
|
r830 | ** All rights reserved. | ||
** For any questions to Digia, please use contact form at http://qt.digia.com | ||||
** | ||||
Miikka Heikkinen
|
r2574 | ** This file is part of the Qt Enterprise Charts Add-on. | ||
Jani Honkonen
|
r830 | ** | ||
** $QT_BEGIN_LICENSE$ | ||||
Miikka Heikkinen
|
r2574 | ** Licensees holding valid Qt Enterprise licenses may use this file in | ||
** accordance with the Qt Enterprise License Agreement provided with the | ||||
Jani Honkonen
|
r830 | ** Software or, alternatively, in accordance with the terms contained in | ||
** a written agreement between you and Digia. | ||||
** | ||||
** If you have questions regarding the use of this file, please use | ||||
** contact form at http://qt.digia.com | ||||
** $QT_END_LICENSE$ | ||||
** | ||||
****************************************************************************/ | ||||
Tero Ahola
|
r1026 | #include "chartview.h" | ||
Titta Heikkala
|
r2714 | #include <QtCore/QtMath> | ||
#include <QtCore/QDebug> | ||||
Tero Ahola
|
r394 | |||
Titta Heikkala
|
r2712 | QT_CHARTS_USE_NAMESPACE | ||
Tero Ahola
|
r394 | |||
Tero Ahola
|
r1026 | ChartView::ChartView(QWidget *parent) | ||
: QChartView(new QChart(), parent), | ||||
m_scatter(0), | ||||
m_scatter2(0) | ||||
Tero Ahola
|
r394 | { | ||
Tero Ahola
|
r1026 | setRenderHint(QPainter::Antialiasing); | ||
chart()->setTitle("Click to interact with scatter points"); | ||||
Tero Ahola
|
r394 | |||
m_scatter = new QScatterSeries(); | ||||
Tero Ahola
|
r1226 | m_scatter->setName("scatter1"); | ||
Jani Honkonen
|
r2098 | for (qreal x(0.5); x <= 4.0; x += 0.5) { | ||
for (qreal y(0.5); y <= 4.0; y += 0.5) { | ||||
Tero Ahola
|
r394 | *m_scatter << QPointF(x, y); | ||
} | ||||
} | ||||
Tero Ahola
|
r1026 | m_scatter2 = new QScatterSeries(); | ||
Tero Ahola
|
r1226 | m_scatter2->setName("scatter2"); | ||
Tero Ahola
|
r394 | |||
Tero Ahola
|
r1026 | chart()->addSeries(m_scatter2); | ||
chart()->addSeries(m_scatter); | ||||
Marek Rosa
|
r1620 | chart()->createDefaultAxes(); | ||
Tero Ahola
|
r1026 | chart()->axisX()->setRange(0, 4.5); | ||
chart()->axisY()->setRange(0, 4.5); | ||||
Tero Ahola
|
r394 | |||
Michal Klocek
|
r967 | connect(m_scatter, SIGNAL(clicked(QPointF)), this, SLOT(handleClickedPoint(QPointF))); | ||
Tero Ahola
|
r394 | } | ||
Tero Ahola
|
r1026 | ChartView::~ChartView() | ||
Tero Ahola
|
r394 | { | ||
} | ||||
Jani Honkonen
|
r2102 | void ChartView::handleClickedPoint(const QPointF &point) | ||
Tero Ahola
|
r394 | { | ||
Tero Ahola
|
r1410 | QPointF clickedPoint = point; | ||
// Find the closest point from series 1 | ||||
Tero Ahola
|
r1412 | QPointF closest(INT_MAX, INT_MAX); | ||
qreal distance(INT_MAX); | ||||
Jani Honkonen
|
r2100 | foreach (QPointF currentPoint, m_scatter->points()) { | ||
Titta Heikkala
|
r2613 | qreal currentDistance = qSqrt((currentPoint.x() - clickedPoint.x()) | ||
* (currentPoint.x() - clickedPoint.x()) | ||||
+ (currentPoint.y() - clickedPoint.y()) | ||||
* (currentPoint.y() - clickedPoint.y())); | ||||
Tero Ahola
|
r1410 | 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); | ||||
Tero Ahola
|
r394 | } | ||