QT之QCustomPlot的使用（二）--实时曲线

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我是靠谱客的博主落寞宝马，这篇文章主要介绍QT之QCustomPlot的使用（二）--实时曲线，现在分享给大家，希望可以做个参考。

首先，我们先进行的是以时间为依据来进行动态展示，下面的代码是完整的可以进行使用；

复制代码

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//动态显示的功能
for (int i = 0; i < 10; i++)
{
num[i] = 0;
}
n = 0;
QTimer *timer = new QTimer;
timer->start(500);
connect(timer, SIGNAL(timeout()), this, SLOT(Graph_Show()));

复制代码

void Graph_Show()
{
QTime t;
t = QTime::currentTime();
qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
n = qrand() % 50;
for (int i = 0; i < 9; i++)
{
num[i] = num[i + 1];
}
num[9] = n;
for (int i = 0; i < 10; i++)
{
temp[i] = i;
temp1[i] = num[i];
}
m_pCustomPlot = new QCustomPlot(this);//初始化曲线图
m_pCustomPlot->setGeometry(1, 1, 400, 300);//初始化曲线图坐标
m_pCustomPlot->setLocale(QLocale(QLocale::Chinese, QLocale::China));
m_pCustomPlot->addGraph();
m_pCustomPlot->graph(0)->setLineStyle(QCPGraph::lsLine);
m_pCustomPlot->graph(0)->setPen(QPen(QColor(0, 0, 255, 200)));
m_pCustomPlot->graph(0)->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssDisc, 5));
m_pCustomPlot->graph(0)->setData(temp, temp1);
m_pCustomPlot->addGraph();
m_pCustomPlot->graph(1)->setPen(QPen(Qt::red));
m_pCustomPlot->graph(1)->setLineStyle(QCPGraph::lsNone);
m_pCustomPlot->graph(1)->setScatterStyle(QCPScatterStyle::ssDisc);
m_pCustomPlot->graph(1)->setData(temp, temp1);
m_pCustomPlot->xAxis->setTickLabelFont(QFont(QFont().family(), 8));
m_pCustomPlot->yAxis->setTickLabelFont(QFont(QFont().family(), 8));
m_pCustomPlot->xAxis->setLabel(“v”);
m_pCustomPlot->yAxis->setLabel(“mV”);
m_pCustomPlot->xAxis->setRange(0, 10);
m_pCustomPlot->yAxis->setRange(-50, 50);
m_pCustomPlot->xAxis2->setVisible(false);
m_pCustomPlot->yAxis2->setVisible(false);
m_pCustomPlot->xAxis2->setTicks(false);
m_pCustomPlot->yAxis2->setTicks(false);
m_pCustomPlot->xAxis2->setTickLabels(false);
m_pCustomPlot->yAxis2->setTickLabels(false);
m_pCustomPlot->replot();
}

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void Graph_Show()
{
QTime t;
t = QTime::currentTime();
qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
n = qrand() % 50;
for (int i = 0; i < 9; i++)
{
num[i] = num[i + 1];
}
num[9] = n;
for (int i = 0; i < 10; i++)
{
temp[i] = i;
temp1[i] = num[i];
}
m_pCustomPlot = new QCustomPlot(this);//初始化曲线图
m_pCustomPlot->setGeometry(1, 1, 400, 300);//初始化曲线图坐标
m_pCustomPlot->setLocale(QLocale(QLocale::Chinese, QLocale::China));
m_pCustomPlot->addGraph();
m_pCustomPlot->graph(0)->setLineStyle(QCPGraph::lsLine);
m_pCustomPlot->graph(0)->setPen(QPen(QColor(0, 0, 255, 200)));
m_pCustomPlot->graph(0)->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssDisc, 5));
m_pCustomPlot->graph(0)->setData(temp, temp1);
m_pCustomPlot->addGraph();
m_pCustomPlot->graph(1)->setPen(QPen(Qt::red));
m_pCustomPlot->graph(1)->setLineStyle(QCPGraph::lsNone);
m_pCustomPlot->graph(1)->setScatterStyle(QCPScatterStyle::ssDisc);
m_pCustomPlot->graph(1)->setData(temp, temp1);
m_pCustomPlot->xAxis->setTickLabelFont(QFont(QFont().family(), 8));
m_pCustomPlot->yAxis->setTickLabelFont(QFont(QFont().family(), 8));
m_pCustomPlot->xAxis->setLabel(“v”);
m_pCustomPlot->yAxis->setLabel(“mV”);
m_pCustomPlot->xAxis->setRange(0, 10);
m_pCustomPlot->yAxis->setRange(-50, 50);
m_pCustomPlot->xAxis2->setVisible(false);
m_pCustomPlot->yAxis2->setVisible(false);
m_pCustomPlot->xAxis2->setTicks(false);
m_pCustomPlot->yAxis2->setTicks(false);
m_pCustomPlot->xAxis2->setTickLabels(false);
m_pCustomPlot->yAxis2->setTickLabels(false);
m_pCustomPlot->replot();
}