C++ (Cpp) plotUpdate Examples

Example #1

File: mainwindow.cpp Project: glocklueng/Qt-Serial-PID-Host

//读串口
void MainWindow::readMyCom()
{
    static unsigned char buffer[BUFFER_SIZE] = {0};
    static unsigned  char counter = 0;
    char ch;
    double _x1, _x2, _pwm;
    while(myCom->bytesAvailable()){
        myCom->getChar(&ch);
        buffer[counter] = ch;
        if(buffer[0] != BUFFER_HEAD1 && counter == 0){
            return;
        }
        counter++;
        if(counter == 2 && buffer[1] != BUFFER_HEAD2){
            counter = 0;
            return;
        }
        if(counter == BUFFER_SIZE){
            counter = 0;
            _x1 = (double)((buffer[2]<<24)|(buffer[3]<<16)|(buffer[4]<<8)|buffer[5])/1000.0f-180;
            _x2 = (double)((buffer[6]<<24)|(buffer[7]<<16)|(buffer[8]<<8)|buffer[9])/1000.0f-180;
            _pwm = (double)((buffer[10]<<24)|(buffer[11]<<16)|(buffer[12]<<8)|buffer[13])/1000.0f-100;
            plotUpdate(ui->customPlot, _x1, _x2, _pwm);
        }
    }
}

Example #2

File: mainwindow.cpp Project: OwenBrotherwood/vag-blocks

void MainWindow::setupPlot()
{
    plotTimer.setInterval(1000/settingsDialog->rate);
    connect(&plotTimer, SIGNAL(timeout()), this, SLOT(plotUpdate()));
    plotTimer.start();

    if (!ui->plot->legend()) {
        QwtLegend* legend = new QwtLegend;
        legend->setItemMode(QwtLegend::CheckableItem);
        ui->plot->insertLegend(legend, QwtPlot::RightLegend);
    }

    ui->plot->setAxisTitle(QwtPlot::xBottom, "seconds");
    ui->plot->setCanvasBackground(Qt::white);

    QColor gridColor;
    gridColor.setNamedColor("grey");
    QPen gridPen(gridColor);
    gridPen.setStyle(Qt::DotLine);
    QwtPlotGrid* grid = new QwtPlotGrid;
    grid->setMajPen(gridPen);
    grid->attach(ui->plot);

    connect(ui->plot, SIGNAL(legendChecked(QwtPlotItem*,bool)), this, SLOT(showCurve(QwtPlotItem*,bool)));
}