Retentive variable value

[Damian7546]

Hi,

I would like to retentive my bool variable. Restore it value after restart app.
Please tell my if below example is properly to retain input1 value :

MyApp::MyApp()
{
    readSettings();
}

void MyApp::writeSettings()
{
    QSettings setting("RetVal", "values" );
    setting.setValue("input1", input1);
}

void MyApp::readSettings()
{
     QSettings setting("RetVal", "values" );
     input1 = setting.value("input1").toBool();

}
void MyApp:input1Changed(bool state)
{
     input1 = state;
     writeSettings();
}

[ChrisW67]

Apart from "RetVal" and "values" not being obviously good choices for organisation and application name respectively, I do not see anything wrong here.

I would generally set the organisation and application names on the application object (i.e. one place only) and use the parameter-free QSettings constructor elsewhere. See Basic Usage in the docs.

There is rarely a need to call QSettings::sync() directly. It will be called internally when the stack-based QSettings instances are destroyed anyway.

[ollarch]

@Damian7546 just call "settings.sync()" after setting the value.

[ChrisW67]

Apart from "RetVal" and "values" not being obviously good choices for organisation and application name respectively, I do not see anything wrong here.

I would generally set the organisation and application names on the application object (i.e. one place only) and use the parameter-free QSettings constructor elsewhere. See Basic Usage in the docs.

There is rarely a need to call QSettings::sync() directly. It will be called internally when the stack-based QSettings instances are destroyed anyway.