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());