[solved] using QSettings

Robbin

Yes, it IS zero size, that's expected behaviour. You have error in your syntax. From the documentation:
@
QSettings settings;
int size = settings.beginReadArray("logins");
for (int i = 0; i < size; ++i) {
@

and you do:
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settings.beginReadArray("notesList");
qDebug()<<"text "<<notesList.size();
for(int i = 0; i < notesList.size() ;++i)
@

Get the size in integer variable and use that for the loop.

alfah

ahhh k :)

mercii :D :D

alfah

one more question,

an applications can have as many settings as possible right?

Robbin

Well you have groups. Just divide your settings in appropriate groups. You can have many settings, and QSettings retrieves the data for you. I don't know about limitation in size.

alfah

ok,
somethin else, its said tht qsettings can hold all sort of settings right?
I have entered stored a date like this
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noteSettings.setValue("setDate",notesList.at(i).setNoteDate);
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reg.setNoteDate is of QDate type
while reading it back, do we need it to use .toDate()
like this??
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QDate checkDate=noteSettings.value("setNoteDate").toDate();
@

thank you.

Robbin

yes, there is .toDate() method for QVariant (that's what gets returned by settings.value() method).

The only trouble you could get with QSettings is if you use GUI types like QColor.
Read "here":http://doc.qt.nokia.com/stable/qsettings.html for more info

lgeyer

[quote author="alfah" date="1314021081"]lukas,
Could you explain to me how both are different and under which situations these are used???[/quote]

The main differences are

sequential access for QDataStream vs random access for QSettings
(efficient) binary storage for QDataStream vs text storage for QSettings
non-human-readable storage for QDataStream vs human-readable storage for QSettings

There is no generally accepted rule on usage, but there is a good rule of thumb. QSettings is used to store the state of an application (opened windows, geometry) and settings (credentials, color schemes), whereas the data of an application itself is serialized using QDataStream (or another data storage like QSqlDatabase, QXmlStreamWriter).

[quote author="alfah" date="1314021081"]The module of mine requires notes to be attached to each date of a custom made calender. So when i click the button, i get another form with a line edit askin the user to input any notes if ...[/quote]

Have you considered storing the data using the "iCal standard":http://tools.ietf.org/html/rfc5545? This way your data will be interchangeable with many other applications processing calendar data.

alfah

does QdataStream provide persistent storage?

Robbin

Of course, you "stream" the data into a file.

lgeyer

Or any other QIODevice.

alfah

will the following lines of code ensure tht Where ever i use the Qsettings, it will open up the same settings files?
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QSettings noteSettings("Plackal","Seecycles");
noteSettings.setDefaultFormat(QSettings::IniFormat);
noteSettings.setPath(QSettings::IniFormat,QSettings::UserScope,QCoreApplication::applicationDirPath());

@

alfah

lgeyer

Unless your applicationDirPath() doesn't change, yes.

Keep in mind that you possibliy have no permission to write to the application directory. This is why you should prefer a user scope directory (like %APPDATA%) over the application directory.