www.pudn.com > chap05.rar > main.cpp

#include  
 
#include "plotter.h" 
 
void readFlightCurves(Plotter *plotter, const QString &fileName) 
{ 
    QVector data[6]; 
    double factX = 0.0013; 
    double factY[6] = { 0.0008, 0.1, 0.2, 0.2, 0.1, 0.8 }; 
    double offsY[6] = { +500, -55, +309, +308, 0, 0 }; 
    int pos[6] = { 3, 6, 7, 8, 9, 10 }; 
    QFile file(fileName); 
    double offsX = 0.0; 
 
    if (file.open(QIODevice::ReadOnly)) { 
        QTextStream in(&file); 
        while (!in.atEnd()) { 
            QString line = in.readLine(); 
            QStringList coords = line.split(' ', 
                                            QString::SkipEmptyParts); 
            if (coords.count() >= 6) { 
                double x = factX * coords[0].toDouble(); 
                if (data[0].isEmpty()) 
                    offsX = x; 
                for (int i = 0; i < 6; ++i) { 
                    double y = coords[pos[i]].toDouble(); 
                    data[i].append(QPointF(x - offsX, 
                                           factY[i] * (y - offsY[i]))); 
                } 
            } 
        } 
    } 
 
    plotter->setCurveData(0, data[0]); 
    plotter->setCurveData(1, data[1]); 
    plotter->setCurveData(2, data[2]); 
    plotter->setCurveData(3, data[3]); 
    plotter->setCurveData(4, data[4]); 
    plotter->setCurveData(5, data[5]); 
} 
 
int main(int argc, char *argv[]) 
{ 
    QApplication app(argc, argv); 
    Plotter plotter; 
    plotter.setWindowTitle(QObject::tr("Plotter")); 
    readFlightCurves(&plotter, "in1.txt"); 
    plotter.show(); 
    return app.exec(); 
}