mirror of
https://gitee.com/drabel/LibQQt.git
synced 2025-01-04 10:18:44 +08:00
130 lines
3.6 KiB
C++
130 lines
3.6 KiB
C++
#include "mainwindow.h"
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#include "ui_mainwindow.h"
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#include <qqttcpclient.h>
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MainWindow::MainWindow ( QWidget* parent ) :
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QMainWindow ( parent ),
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ui ( new Ui::MainWindow )
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{
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ui->setupUi ( this );
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QQtTcpClient t;
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setupRealtimeDataDemo ( ui->qwtPlot );
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}
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MainWindow::~MainWindow()
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{
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delete ui;
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}
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void MainWindow::setupRealtimeDataDemo ( QwtPlot* qwtplot )
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{
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//初始化xdata,x对应长度为5的坐标，y初始全为0
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for ( int i = 1; i < 5001; i++ )
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{
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xdata.append ( double ( i ) / 1000 - 5 );
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ydata.append ( 0 );
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}
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demoName = "Real Time Data Demo";
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qwtplot->setTitle ( demoName );
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qwtplot->setCanvasBackground ( Qt::gray ); //背景
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qwtplot->insertLegend ( new QwtLegend(), QwtPlot::RightLegend ); //标签
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curve = new QwtPlotCurve();
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curve->setTitle ( "肌电信号" ); //曲线名字
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curve->setPen ( Qt::yellow, 1 ); //曲线的颜色 宽度;
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QTime curtime;
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curtime = curtime.currentTime();
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qwtplot->setAxisTitle ( QwtPlot::xBottom, " System Uptime" );
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qwtplot->setAxisTitle ( QwtPlot::yLeft, "EMG" );
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qwtplot->setAxisScale ( QwtPlot::yLeft, -2, 2, 1 );
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qwtplot->setAxisScale ( QwtPlot::xBottom, -5, 0, 1 );
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QwtPlotZoomer* zoomer = new QwtPlotZoomer ( qwtplot->canvas() );
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zoomer->setRubberBandPen ( QColor ( Qt::blue ) );
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zoomer->setTrackerPen ( QColor ( Qt::black ) );
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zoomer->setMousePattern ( QwtEventPattern::MouseSelect2, Qt::RightButton, Qt::ControlModifier );
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zoomer->setMousePattern ( QwtEventPattern::MouseSelect3, Qt::RightButton );
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QwtPlotMagnifier* magnifier = new QwtPlotMagnifier (
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qwtplot->canvas() ); //默认的滑轮及右键缩放功能 图形的整体缩放
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// magnifier->setMouseButton(Qt::LeftButton); //设置哪个按钮与滑轮为缩放画布 如果不设置(注册掉当前行)按钮默认为滑轮以及右键为缩放
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QwtPlotGrid* grid = new QwtPlotGrid();
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grid->enableX ( true ); //设置网格线
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grid->enableY ( true );
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grid->setMajorPen ( Qt::black, 0, Qt::DotLine );
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grid->attach ( qwtplot );
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connect ( &updateTimer, SIGNAL ( timeout() ), this, SLOT ( updatedataSlot() ) );
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updateTimer.start ( 0 );
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}
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/**
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* @brief getData
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* @param inteval
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* @return
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* 获取一个值 模拟串口接收到的值
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*/
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double MainWindow::getData ( double time )
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{
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double s = qCos ( time * M_PI * 2 ) ;
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return s;
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}
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//用于更新ydata,实际情况就是read数据
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void MainWindow::updatedataSlot()
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{
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static QTime dataTime ( QTime::currentTime() );
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long int eltime = dataTime.elapsed();
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static int lastpointtime = 0;
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int size = ( eltime - lastpointtime );
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if ( size > 0 ) //有数据传入
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{
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ydata.erase ( ydata.begin(), ydata.begin() + size ); //擦除多余的数据
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for ( int i = 1; i < size + 1; i++ )
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{
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ydata.append ( getData ( ( ( ( double ) lastpointtime + i ) / 1000 ) ) );
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}
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lastpointtime = eltime;
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}
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curve->setSamples ( xdata, ydata );
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curve->attach ( ui->qwtPlot );
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ui->qwtPlot->replot();
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static double lastFpsKey;
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static int frameCount;
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++frameCount;
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double fpstime = ( double ) eltime / 1000.0 - lastFpsKey;
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if ( fpstime > 2 ) // average fps over 2 seconds
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{
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ui->statusBar->showMessage (
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QString ( "%1 FPS" )
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.arg ( frameCount / fpstime, 0, 'f', 0 )
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, 0 );
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lastFpsKey = ( double ) eltime / 1000.0;
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frameCount = 0;
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}
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}
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