TrainCamp_lipengpeng_Modbus/communicationhistory.cpp

#include "communicationhistory.h"

bool SaveDate(QWidget *parent, QTextEdit *edit)
{
    QString fileName = QFileDialog::getSaveFileName(
        parent,
        "保存文本",
        QDir::homePath() + "/note.txt",
        "文本文件 (*.txt);;所有文件 (*)");

    if (fileName.isEmpty())
        return false;

    QFile file(fileName);
    if (!file.open(QIODevice::Append | QIODevice::Text))
    {
        QMessageBox::warning(parent, "错误", "无法打开文件");
        return false;
    }

    if (file.size() > 0)
        file.write("\n");

    QTextStream out(&file);
    out.setCodec("UTF-8");
    out << edit->toPlainText();
    file.close();
    return true;
}

bool ReadDate(QWidget *parent, QTextEdit *edit)
{
    QString fileName = QFileDialog::getOpenFileName(
        parent,
        "打开文本",
        QDir::homePath(),
        "文本文件 (*.txt);;所有文件 (*)");

    if (fileName.isEmpty())
        return false;

    QFile file(fileName);
    if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        QMessageBox::warning(parent, "错误", "无法读取文件");
        return false;
    }

    QTextStream in(&file);
    in.setCodec("UTF-8");
    edit->setPlainText(in.readAll());
    file.close();
    return true;
}