DataRealTimeDisplay/realTimeDataDisplay/realTimeDataDisplay.cpp

#include "realTimeDataDisplay.h"

realTimeDataDisplay::realTimeDataDisplay(QWidget* parent)
	: QMainWindow(parent)
{
	ui.setupUi(this);

	mPlot = new QCustomPlot(this);
	setCentralWidget(mPlot);

	//mPlot->yAxis->setTickLabels(false);
	mPlot->axisRect()->axis(QCPAxis::atRight, 0)->setPadding(54);

	mGraph1 = mPlot->addGraph(mPlot->xAxis, mPlot->axisRect()->axis(QCPAxis::atRight, 0));

	QColor color1(100, 140, 180);
	QPen pen;
	pen.setStyle(Qt::PenStyle::SolidLine);
	pen.setColor(color1);
	mGraph1->setPen(pen);
	color1.setAlpha(100);
	mPlot->graph(0)->setBrush(QBrush(color1));
	mPlot->graph(0)->setName("sin(t)+sin(t/0.38)");

	mGraph2 = mPlot->addGraph(mPlot->xAxis, mPlot->axisRect()->axis(QCPAxis::atRight, 0));
	QColor color2(166, 77, 157);
	pen.setStyle(Qt::PenStyle::SolidLine);
	pen.setColor(color2);
	mGraph2->setPen(pen);
	color2.setAlpha(100);
	mPlot->graph(1)->setBrush(QBrush(color2));
	mPlot->graph(1)->setName("sin(t)");

	QSharedPointer<QCPAxisTickerTime> timeTicker(new QCPAxisTickerTime);
	timeTicker->setTimeFormat("%h:%m:%s");
	mPlot->xAxis->setTicker(timeTicker);
	mPlot->xAxis->setRange(0, 16);
	mPlot->yAxis->setRange(-2.2, 2.2);
	mPlot->xAxis->setLabel("time");
	mPlot->yAxis->setLabel("value");
	mPlot->plotLayout()->insertRow(0);
	QCPTextElement* title = new QCPTextElement(mPlot, "Realtime Data Display");
	mPlot->plotLayout()->addElement(0, 0, title);

	connect(mPlot, &QCustomPlot::mousePress, this, [=] { xAxisAutoChange = false; });
	connect(mPlot, &QCustomPlot::mouseRelease, this, [=] { xAxisAutoChange = true; });

	mPlot->setInteractions(QCP::iRangeDrag);
	QList<QCPAxis*>list;
	list.append(mPlot->xAxis);
	mPlot->axisRect()->setRangeDragAxes(list);
	mPlot->axisRect()->setupFullAxesBox();

	mTimerThread = new QThread(this);
	mDataTimer = new QTimer();
	connect(mDataTimer, SIGNAL(timeout()), this, SLOT(timerSlot()), Qt::DirectConnection);
	connect(mTimerThread, &QThread::finished, mDataTimer, &QObject::deleteLater);
	connect(mTimerThread, &QThread::finished, mTimerThread, &QObject::deleteLater);
	connect(this, &realTimeDataDisplay::updateUICustomPlot, this, &realTimeDataDisplay::onUpdateUICustomPlot);
	mTimerThread->start();
	mDataTimer->start(16);
	mDataTimer->moveToThread(mTimerThread);
	qDebug() << "this Thread:" << QThread::currentThreadId() << QThread::currentThread();

	mTag1 = new AxisTag(mGraph1->valueAxis());
	mTag1->setPen(mGraph1->pen());
	mTag2 = new AxisTag(mGraph2->valueAxis());
	mTag2->setPen(mGraph2->pen());

	mPlot->legend->setVisible(true);
	mPlot->legend->setBrush(QColor(255, 255, 255, 150));
}

realTimeDataDisplay::~realTimeDataDisplay()
{
	if (mDataTimer)
	{
		mTimerThread->quit();
		mTimerThread->wait();
		//connect: &QObject::deleteLater，不需要delete
		mTimerThread = nullptr;
		mDataTimer = nullptr;
	}
}

void realTimeDataDisplay::onUpdateUICustomPlot(double key, double v1, double v2)
{
	if (xAxisAutoChange)
		mPlot->xAxis->setRange(key, 16, Qt::AlignRight);

	mTag1->updatePosition(v1);
	mTag2->updatePosition(v2);
	if (v1 > 0)
		mTag1->setText("+" + QString::number(v1, 'f', 2));
	else
		mTag1->setText(QString::number(v1, 'f', 2));
	if (v2 > 0)
		mTag2->setText("+" + QString::number(v2, 'f', 2));
	else
		mTag2->setText(QString::number(v2, 'f', 2));
	mPlot->replot();
}

void realTimeDataDisplay::timerSlot()
{
	//qDebug() << "timerSlot Thread:" << QThread::currentThreadId() << QThread::currentThread();

	static QTime timeStart = QTime::currentTime();
	double key = timeStart.msecsTo(QTime::currentTime()) / 1000.0;
	static double lastFpsKey;
	static int frameCount;
	++frameCount;
	if (key - lastFpsKey > 2) // average fps over 2 seconds
	{
		ui.statusBar->showMessage(QString("%1 FPS").arg(frameCount / (key - lastFpsKey), 0, 'f', 0), 0);
		lastFpsKey = key;
		frameCount = 0;
	}
	mPlot->graph(0)->addData(key, qSin(key) + qSin(key / 0.3843));
	mPlot->graph(1)->addData(key, qSin(key));

	double graph1Value = mGraph1->dataMainValue(mGraph1->dataCount() - 1);
	double graph2Value = mGraph2->dataMainValue(mGraph2->dataCount() - 1);

	emit updateUICustomPlot(key, graph1Value, graph2Value);
	//mTag1->updatePosition(graph1Value);
	//mTag2->updatePosition(graph2Value);
	//if (graph1Value > 0)
	//	mTag1->setText("+" + QString::number(graph1Value, 'f', 2));
	//else
	//	mTag1->setText(QString::number(graph1Value, 'f', 2));
	//if (graph2Value > 0)
	//	mTag2->setText("+" + QString::number(graph2Value, 'f', 2));
	//else
	//	mTag2->setText(QString::number(graph2Value, 'f', 2));
	//mPlot->replot();
}