Check file is modified?

[mamyte03@gmail.com]

I have this type of problem. On printWidget with printDialog inserting file in database. Opening (putting on QDir::tempPatch() )it I can it edit and so on. On save I am checkink modified date. But now I need to open file (for example *doc) , close my printWidget, open for example serviceOrderWidget, close it, go to my opened *doc file, editing it, and saving. When the my program need to ask me want i to save edited file.
How can i check is this program(file with *.doc) closed? Now i opening it

void FileWidget::on_openButton_clicked()
{
    QString id=lineEdit->text();
    QString failas=lineEdit_2->text()+"."+typeEdit->text();
    QString tempFile=QDir::tempPath()+"/"+id+failas;
 
    QFile f(tempFile);
    f.open(QIODevice::WriteOnly);
    f.write(record->getValue("file", "content").toByteArray());
    f.close();
 
    QFileInfo info(tempFile);
    firstDate=info.lastModified();
 
    QDesktopServices::openUrl(QUrl::fromLocalFile(tempFile));
 
 
    //qDebug()<<firstDate;

void FileWidget::on_openButton_clicked()
{
    QString id=lineEdit->text();
    QString failas=lineEdit_2->text()+"."+typeEdit->text();
    QString tempFile=QDir::tempPath()+"/"+id+failas;
    
    QFile f(tempFile);
    f.open(QIODevice::WriteOnly);
    f.write(record->getValue("file", "content").toByteArray());
    f.close();

    QFileInfo info(tempFile);
    firstDate=info.lastModified();
    
    QDesktopServices::openUrl(QUrl::fromLocalFile(tempFile));

   
    //qDebug()<<firstDate;

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