Re: please explain me that:

[Nicolas SANCHEZ]

reuss wrote:
> I would like to limit the number of characters to input in my textfield
>
> I posed my question about it, and I got responses, but it is too concise
> for me. Could someone help me by examples to understand the following:
>
>
> > When using an NSTextView, you would implement
> > -textView:shouldChangeTextInRange:replacementString: in the delegate and
> > rejecting the change (by returning NO) if it would cause the string to
> > become too long. In an NSTextField, the text field instance sets itself
> > as the delegate for the NSTextView field editor, so you could write a
> > custom subclass of NSTextField that implemented
> > -textView:shouldChangeTextInRange:replacementString: and use that
> > instead of a plain NSTextField.
> >
> > (An alternative would be to use formatters, but that isn't implemented
> > yet.)
> >
> > - Alexander Malmberg
>
>
> thanks
> andras

that's ok, i've the solution, get the files in attachement, it's a 
subclass of NSTextField.
#ifndef _MYTEXTFIELD_H_
#define _MYTEXTFIELD_H_

#include <AppKit/AppKit.h>

@interface myTextField: NSTextField

- (id)initWithFrame: (NSRect)aFrame;
- (BOOL)textView:(NSTextView *)aTextView 
shouldChangeTextInRange:(NSRange)affectedCharRange replacementString:(NSString 
*)replacementString;

@end

#endif

#include "myTextField.h"

@implementation myTextField

- (id)initWithFrame: (NSRect)aFrame
{
  [super initWithFrame: aFrame];

  [self setDelegate: self];

  return self;
}

- (BOOL)textView:(NSTextView *)aTextView 
shouldChangeTextInRange:(NSRange)affectedCharRange replacementString:(NSString 
*)replacementString
{
  if ([[self stringValue] length] > 10)
    return NO;
  else
    return YES;
}

@end