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Code: Alles auswählen

// Die Variablen
int sx=0;
const int Size=27;
double xval[Size];
double yval[Size];

//Die plotfunktion
void tpopt::plot1()
{
xval[sx]=sx;
yval[sx]=thread1.ywertplot1; 

curve1->setSymbol(new QwtSymbol(QwtSymbol::Cross, Qt::NoBrush,
        QPen(Qt::black), QSize(5, 5) ) ); 
curve1->setPen(QColor(Qt::darkGreen));
curve1->setStyle(QwtPlotCurve::Lines);
curve1->setRawSamples(xval, yval, Size);
sx++; 
}

Code: Alles auswählen

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <qwt_plot_curve.h>

const int MAX_VALUE = 10;
namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private:
    Ui::MainWindow *ui;
    double xValue[MAX_VALUE];
    double yValue[MAX_VALUE];
    QwtPlotCurve *curve;
};

#endif // MAINWINDOW_H

Code: Alles auswählen

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow),
    curve(new QwtPlotCurve)
{
    ui->setupUi(this);
    for (int i=0; i<MAX_VALUE; ++i){
        xValue[i]=i;
        yValue[i]=i;
    }

    curve->setSymbol(new QwtSymbol(QwtSymbol::Cross, Qt::NoBrush,
            QPen(Qt::black), QSize(5, 5) ) );
    curve->setPen(QColor(Qt::darkGreen));
    curve->setStyle(QwtPlotCurve::Lines);

    curve->attach(ui->qwtPlot);
    curve->setRawSamples(xValue, yValue, MAX_VALUE);
    ui->qwtPlot->replot();

}

MainWindow::~MainWindow()
{
    delete ui;
}

Code: Alles auswählen

#include <QtGui/QApplication>
#include "mainwindow.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}