How to save spinbox or sliders value into a text file ?

[Amine Djeddi]

hi Qties !!
i have 6 spinboxes in my Qt designer i want to save it's values into text file !!

any idea ?

thank you :p

[mrjj]

Hi
Well just open file and write the values ?
You can use QString::number to go from int to text version.
Did you have something more fancy in mind ?
Also samples just writes each value after each other.
Maybe you had some format in mind ?

QString filename="Data.txt";
QFile file( filename );
if ( file.open(QIODevice::ReadWrite | QIODevice::Text)  )
{
    QTextStream stream( &file );
    stream << QString::number(ui->spin1->value()) << QString::number(ui->spin2->value()) ... << endl;
}

[Amine Djeddi]

@mrjj
yes that is what i was thinking about , creating a file , and write into them ,
but i did better to ask before programming it , because i did not though about Qstring:: number

thank you so much , i will do it , if i get into trouble i ask again xD

[mrjj]

@Amine-Djeddi
Hi
Ok super.
Do you plan to read them in again ?

[Amine Djeddi]

@mrjj
yes i did it before ((you adviced me to use Plain text Edit)) so i have managed to write en read into file

[mrjj]

@Amine-Djeddi
Ok. just asking as then you want to separate the values with newline or something like that
as as sample will look messy :)
I meant, if you wanted to read them back into the spinboxes.
If just for reading the complete text files, its not so important but might be need to be
human readable.

[Amine Djeddi]

@mrjj
yeees , i want to to separate the values with a comma

[mrjj]

@Amine-Djeddi
ok.
you can just do that directly

 stream << QString::number(ui->spin1->value()) <<"," << QString::number(ui->spin2->value()) <<"," .... << endl;

[Amine Djeddi]

@mrjj
ahh yes sorry my english is little bit bad ..... ,
yeees i want to read them back into spinbox it's good idea !!
can you help me

[mrjj]

@Amine-Djeddi
Well something like
(disclaimer, didnt try compile it so there will by errors. My win qt died )

QFile file("Data.txt");
if(!file.open(QIODevice::ReadOnly)) {
    QMessageBox::information(0, "error", file.errorString());
}
QTextStream in(&file);
while(!in.atEnd()) {
    QString line = in.readLine();    
    QStringList fields = line.split(",");        
}
file.close();
Now each entry in fields will be a value ( in text format)
so you can do 
if ( ! fields.size() )  { // this is sanity check that we did get something in list
  QMessageBox::information(0, "error happened", "error");
return;
}
// assign back
ui->spin1->setValue( fields[0].toInt());
ui->spin1->setValue( fields[1].toInt());