载入数据（一行一个）

来源：互联网发布：php 魔术引号编辑：程序博客网时间：2024/06/05 18:11

void Widget::on_pushButton_3_clicked()                       //载入数据

    QFileDialog *fileDialog=new QFileDialog(this);

    fileDialog->setWindowTitle(tr("open many days light data"));

    fileDialog->setDirectory(".");

    fileDialog->setFilter(tr("data Files(*.txt)"));

    if(fileDialog->exec()==QDialog::Accepted)

        QString path=fileDialog->selectedFiles()[0];

        QFile file(path);

        if(!file.open(QIODevice::ReadOnly | QIODevice::Text))

            return;

        QTextStream in(&file);

        dayLData.clear();

        while(!in.atEnd())

            QString strLine=in.readLine();

            dayLData.append(strLine.toFloat());

        file.close();

......

    p3->setCorrds(1000,0,100,74000);

    p3->setCurveData(3,adayLpCurData);

    return;

0 0