I am new to Linux and QT, recently installed Red-hat 9 and am having problems with QString. Ive been through the QT Designer - Quick start - tutorials everything compiles and working fine but can only find examples of making QString variables with a string set when declared that doesn't change.

I wanted to read a string in from a file then displays it in a QLineedit, then turn the string round, so it is back to front and displays it in another line QLineedit.

I have got a simple c program to do this but displays the string at the command line instead, using ( char ) arrays and ( FILE ).

I hadn’t used QT before and tried to use the equivalent of:

char string[50] = "a string";

myLineedit->setText(string);

and I got an error saying it needs a ( const QString* ) or something like that, so I tried:

QString string[50] = "a string";

I got more errors, but it let me do:

QString string = "a string";

I compiled and it worked, but once I’d done that. I couldn’t find a way to swap the string round so it was back to front i.e. "gnirts a", except by a separate ( char ), is there a way?

I tried:

char temp[50] = "my string";
QString string = temp;

But again I got errors, so I looked on the Internet an found I could use the

mylineedit->setText(QString("%1").arg( temp ) ):

That worked as long as temp wasn’t an array.

Is there any way you can use QString like a ( char ) array?
Or sending an array to setText?
Or any other way of changing a string round char by char you could think of? All suggestions and help are welcome.

Thanks for any help

Hello,

you have told us what you want to
do ... what is your QString related
problem?

Cheers,
Tink

all messages are welcome

That's rather generous but won't help
us in trying to help you....



Cheers,
Tink

i solved half the problem and found a way of shortening my problem to a line:

i can convert from char[] to QString by:

char string[] = "hi";

MyLineEdit->setText( QString( "%s" ).arg( string ) );

ill i want to do now is convert from QString back to char[], So i can put back in that array whatever is in a QLineedit, i found the .ascii() and .latin1() functions but they dont seem to work on char arrays through:

MyLineEdit->text();

can any one help now, please?

I Solved the problem.

with QByteArray and QCString:

QString qstring = "solved";

QByteArray qarray = QCString( qstring );

or

QByteArray qarray = QCString( mylineedit->Text().Latin1() );

then as before on the other end.

mylineedit->setText("%1").args(qarray);

Thanks anyway.

P.S if anyone wants more information on QString / QCString / QByteArray go here