如何在不使用 QCustomPlot 的情况下在 Qt 中创建实时散点图?
How to create a real-time scatter plot in Qt without using QCustomPlot?
我正在尝试使用 QtCharts 将随机生成的数据实时绘制成散点图。我想使用 QtCharts 来做到这一点,甚至尝试将 Qt Audio Example 重新用于解决方案,但没有成功。关于如何正确执行此操作的任何建议?
我为您更改了 Qt 散点图示例:
您只需要使用 QTimer
和 QRandomGenerator
。
chartview.h :
#ifndef CHARTVIEW_H
#define CHARTVIEW_H
#include <QtCharts/QChartView>
QT_CHARTS_USE_NAMESPACE
class ChartView: public QChartView
{
Q_OBJECT
public:
explicit ChartView(QWidget *parent = 0);
private:
QTimer *_timer;
int _x = 0;
};
#endif // CHARTVIEW_H
chartview.cpp :
#include "chartview.h"
#include <QtCharts/QScatterSeries>
#include <QtCharts/QLegendMarker>
#include <QTimer>
#include <QtMath>
#include <QtCore/QRandomGenerator>
ChartView::ChartView(QWidget *parent):
QChartView(new QChart(), parent)
{
QScatterSeries *series0 = new QScatterSeries();
series0->setName("scatter1");
series0->setMarkerShape(QScatterSeries::MarkerShapeCircle);
series0->setMarkerSize(15.0);
QScatterSeries *series2 = new QScatterSeries();
series2->setName("scatter2");
series2->setMarkerShape(QScatterSeries::MarkerShapeCircle);
series2->setMarkerSize(15.0);
_timer = new QTimer();
connect(_timer, &QTimer::timeout, this, [series0, this]()
{
series0->append(_x++, QRandomGenerator::global()->bounded(10));
});
_timer->start(1000);
*series2 << QPointF(1, 5) << QPointF(4, 6) << QPointF(6, 3) << QPointF(9, 5);
setRenderHint(QPainter::Antialiasing);
chart()->addSeries(series0);
chart()->addSeries(series2);
chart()->setTitle("Simple scatterchart example");
chart()->createDefaultAxes();
chart()->setDropShadowEnabled(false);
chart()->legend()->setMarkerShape(QLegend::MarkerShapeFromSeries);
}
输出为:
我正在尝试使用 QtCharts 将随机生成的数据实时绘制成散点图。我想使用 QtCharts 来做到这一点,甚至尝试将 Qt Audio Example 重新用于解决方案,但没有成功。关于如何正确执行此操作的任何建议?
我为您更改了 Qt 散点图示例:
您只需要使用 QTimer
和 QRandomGenerator
。
chartview.h :
#ifndef CHARTVIEW_H
#define CHARTVIEW_H
#include <QtCharts/QChartView>
QT_CHARTS_USE_NAMESPACE
class ChartView: public QChartView
{
Q_OBJECT
public:
explicit ChartView(QWidget *parent = 0);
private:
QTimer *_timer;
int _x = 0;
};
#endif // CHARTVIEW_H
chartview.cpp :
#include "chartview.h"
#include <QtCharts/QScatterSeries>
#include <QtCharts/QLegendMarker>
#include <QTimer>
#include <QtMath>
#include <QtCore/QRandomGenerator>
ChartView::ChartView(QWidget *parent):
QChartView(new QChart(), parent)
{
QScatterSeries *series0 = new QScatterSeries();
series0->setName("scatter1");
series0->setMarkerShape(QScatterSeries::MarkerShapeCircle);
series0->setMarkerSize(15.0);
QScatterSeries *series2 = new QScatterSeries();
series2->setName("scatter2");
series2->setMarkerShape(QScatterSeries::MarkerShapeCircle);
series2->setMarkerSize(15.0);
_timer = new QTimer();
connect(_timer, &QTimer::timeout, this, [series0, this]()
{
series0->append(_x++, QRandomGenerator::global()->bounded(10));
});
_timer->start(1000);
*series2 << QPointF(1, 5) << QPointF(4, 6) << QPointF(6, 3) << QPointF(9, 5);
setRenderHint(QPainter::Antialiasing);
chart()->addSeries(series0);
chart()->addSeries(series2);
chart()->setTitle("Simple scatterchart example");
chart()->createDefaultAxes();
chart()->setDropShadowEnabled(false);
chart()->legend()->setMarkerShape(QLegend::MarkerShapeFromSeries);
}
输出为: