Re: Initializing NSDecimalTabStopType returns NSRightTabStopType

FROM : Aki Inoue
DATE : Thu Feb 21 23:48:49 2008

Ross,

Thank you for filing the bug.

Indeed there is a bug in NSTextTab.

Fortunately, it only affects -tabStopType method.  The actual instance 
created works as a decimal tab.

Aki

On 2008/02/21, at 14:30, Ross Carter wrote:
> I've filed a bug on this (5757951) but I hope there's a workaround. 
> The initializer for creating a NSTextTab of type 
> NSDecimalTabStopType is initWithAlignment:(NSTextAlignment)alignment 
> location:(CGFloat)location options:(NSDictionary *)options. There is 
> no NSTextAlignment for dec tabs, so you use NSRightTextAlignment, 
> and the initializer apparently figures out that you want a decimal 
> tab by looking in the options dictionary.
>
> But usually I get a right-aligned textTab even though I've requested 
> a decimal-aligned textTab. Sometimes an incantation can help:
>
>     // Create an options dictionary to be used in creating a decimal 
> NSTextTab:
>     NSCharacterSet *charSet = [NSCharacterSet 
> characterSetWithCharactersInString:@"."];
>     NSDictionary *optionsDict = [NSDictionary 
> dictionaryWithObject:charSet 
> forKey:NSTabColumnTerminatorsAttributeName];
>     
>     // try to create a decimal NSTextTab using that options dict:
>     NSTextTab *textTab1 = [[NSTextTab alloc] 
> initWithTextAlignment:NSRightTextAlignment
>                                                           location:location
>                                                           options:optionsDict];
>     NSLog(@"tabStopType is %i", [textTab1 tabStopType]);
>     // Doesn't work; tabStopType is 1 (right)
>     
>     // Create and release a default decimal NSTextTab:
>     NSTextTab *dummyTab = [[NSTextTab alloc] 
> initWithType:NSDecimalTabStopType location:location];
>     [dummyTab release];
>     
>     // Now try again to create the decimal NSTextTab using the same 
> options dict:
>     NSTextTab *textTab2 = [[NSTextTab alloc] 
> initWithTextAlignment:NSRightTextAlignment
>                                                           location:location
>                                                           options:optionsDict];
>     NSLog(@"tabStopType is %i", [textTab2 tabStopType]);
>     // It works; tabStopType is 3 (decimal)
>
> but sometimes I get the right-aligned textTab no matter what.
>
> Any ideas on a sure-fire way to initialize a decimal NSTextTab?
>
> Ross
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