NetNews Usenet Archive 1992 #16/NN_1992_16.iso/spool/comp/sys/mac/programm/12748

Text File | 1992-07-20 | 3.2 KB | 103 lines

Newsgroups: comp.sys.mac.programmer
Path: sparky!uunet!mcsun!ub4b!info-sparc1.info.ucl.ac.be!NewsWatcher
From: [e-mail]  (Christophe Meessen)
Subject: Re: Q: DrawString only draws 8 characters of my string
Message-ID: <Meessen-210792094221@130.104.58.6>
Followup-To: comp.sys.mac.programmer
Sender: [e-mail] (News Administrator)
Nntp-Posting-Host: 130.104.58.6
Organization: Universite Catholique de Louvain (Belgium)
References: <[e-mail]> <[e-mail]>
Date: Tue, 21 Jul 1992 08:04:11 GMT
Lines: 89

In article <[e-mail]>, [e-mail] (Matthias
Neeracher) wrote:
>
> In article <[e-mail]> [e-mail] (Russ Poldrack) writes:
> >I'm trying to print some strings using DrawString() and it refuses to
> >print more than 8 characters of the string.  The variables are intact
> >and the entire string is there is the watch window, but it doesn't
> >come out on the screen.  The variables being printed are declared as
> >char[20], so pointer checking is off to make it run.
>            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> Aargh! Did you ever work in the nuclear power industry? The compiler is your
> *friend*. It was trying to *tell* you something.
>
> >Does the
> >variable HAVE to be an Str255?  Thanks.
>
> It doesn't have to be a Str255. It does, however, have to be a *Pascal* string.
> Pascal Strings start with a count byte, as opposed to C strings, which are
> terminated with a 0 byte.
>
> You have 2 alternatives:
>
> - use drawstring instead of DrawString or
> - Declare your variables as Str31 or Str255 and write your string literals with
> a "\p" at the beginning, as in "\pHello World"
>
> Personally, I prefer #2, but for small programs, #1 might be easier.
>
...
> Matthias

I would suggest to avoid literal strings in a Macintosh program. Better use
resource strings for constant strings. It's not that hard to implement.

To draw a C string I would then suggest to use
void DrawText( Ptr textBuf, short firstByte, short byteCount )

suppose your variable is

char theString[20];

use

DrawText( (Ptr)theString, 0, strlen( theString ) );


To load and draw constant string from a 'STR ' resource. To access such a
string you only need the resource ID.

// declare the string handle
Handle theString;

// load the string from 'STR ' resource with ID kStringID
theString = (Handle)GetResource( 'STR ', kStringID );

// remove handle from resource map
DetachResource( theString );

// draw the resource
DrawText( *theString, 0, GetHandleSize( theString ) );

// free's space used by the string
DisposHandle( theString);



You may also load the string from a 'STR#' resource. Each resource may
contain more than one resource. To access such a string you need the
resource ID and the index number (1 - ... ) of the string.

// declare the string buffer
Str255 theString;

// load the string from 'STR#' resource with ID kStringID and index
kStringIdx
GetIndString( &theString, kStringID, kStringIdx );

// draw the resource
DrawString( theString );

equivalent to

DrawText( theString + 1, 0, theString[0] );


Bien cordialement,

                           Christophe MEESSEN