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/* TurboTextField.m
*
* TurboTextField is a subclass of TextField which installs
* the TurboTFCell class as it's Cell class. It also overrides
* textDidGetKeys:isEmpty: in order to support "length watching"
* and the ability to restore the previous text after a paste has
* failed because it is too long.
*
*
* You may freely copy, distribute, and reuse the code in this example.
* NeXT disclaims any warranty of any kind, expressed or implied, as to its
* fitness for any particular use.
*
* Written by: Sharon Zakhour
* Created: Oct/91
*/
#import "TurboTextField.h"
#import "TurboTFCell.h"
@implementation TurboTextField
// See the README.rtf file (change history -- 4/27/92) for more information
// as to why the cell class is set in -initFrame as opposed to +initialize.
- initFrame:(const NXRect *)frameRect
{
id newTextField;
[[self class] setCellClass: [TurboTFCell class]];
newTextField = [super initFrame:frameRect];
[[self class] setCellClass: [TextFieldCell class]];
return newTextField;
}
- setMaxLength: (int) length
{
return [cell setMaxLength: length];
}
- setAutoJump: (BOOL) flag forLength: (int)length
{
return [cell setAutoJump: flag forLength: length];
}
- setAcceptsReturn: (BOOL) flag
{
return [cell setAcceptsReturn: flag];
}
- setCustomFilter: (NXTextFilterFunc)aFilter
{
return [cell setCustomFilter: aFilter];
}
#define TOO_LONG 1
#define ILLEGAL_STRING 2
- textDidGetKeys:sender isEmpty:(BOOL)flag
{
int oldLen, error = 0;
char *temp;
if (!flag)
{
temp = malloc([cell maxLength] + 1);
[sender getSubstring:temp start:0 length:[cell maxLength]];
temp[[cell maxLength]] = '\0';
// First check to see if the string is too long. This will only
// occur when pasting since the text and character filters
// handle keyboard entry.
if ([cell maxLength] && [sender textLength] > [cell maxLength])
{
error = TOO_LONG;
}
// Next, run this text through the filter. This will
// catch any illegally formatted paste.
if ([cell checkString: temp] == NO)
{
error = ILLEGAL_STRING;
}
switch (error)
{
case 0:
// No error -- so save current input text and return
[cell setOriginalText: temp];
return self;
case TOO_LONG:
NXBeep();
NXRunAlertPanel (NULL, "String too long...","OK", NULL, NULL);
break;
case ILLEGAL_STRING:
NXBeep();
NXRunAlertPanel (NULL, "Illegally formatted string...","OK", NULL, NULL);
break;
}
// Now replace the original text (because an error was encountered)
[sender setSel: 0 : [sender textLength]];
oldLen = strlen([cell originalText]);
if (oldLen)
[sender replaceSel : [cell originalText]];
else
[sender replaceSel: ""];
[sender setSel: oldLen: oldLen];
}
// If a delegate has been installed, let it have a crack at this...
[super textDidGetKeys: sender isEmpty: flag];
return self;
}
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.