Re: Centering an NSAttributedString in a line in a view

FROM : delanoy
DATE : Wed Jul 19 19:50:34 2006

>Put an NSLog on your "parsty" as soon as it is set (i.e. before you change
>it, as it comes from super). I think you'll see right away that you've made
>an unwarranted and incorrect assumption.


  I don't quite follow you ? Before sending my original post, I analized this
problem with the debugger ( I redid that after your last post, to be sure)
and it seems that everything goes as planned during the compilation phase.

To quote the debugger :

(gdb) po parsty (*just before the line [parsty setAlignment:
NSCenterTextAlignment] gets called*)
Alignment 4, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0,
HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 0/0,
LineHeightMultiple 0, LineBreakMode 0, Tabs (288C, 576R),
DefaultTabInterval 0, Blocks (null), Lists (null), BaseWritingDirection
-1, HyphenationFactor 0, TighteningFactor 0.05, HeaderLevel 0

(gdb) po parsty (* just after that line has been executed *)
Alignment 2, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0,
HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 0/0,
LineHeightMultiple 0, LineBreakMode 0, Tabs (288C, 576R),
DefaultTabInterval 0, Blocks (null), Lists (null), BaseWritingDirection
-1, HyphenationFactor 0, TighteningFactor 0.05, HeaderLevel 0

  All I understand here is that the Alignement parameter has been
modified in parsty, exactly as I wanted.
  What am I supposed to ``see right away" here ? Is there some parameter
that should be nonzero ?

                                              Ewan



> On or about 7/19/06 2:14 AM, thus spake "<email_removed>"

>>
>> -(NSAttributedString*) pageFooter
>> {
>>      NSAttributedString* oldFooter;
>>      NSMutableAttributedString* newFooter;
>>      unsigned footerLength;
>>      NSRange range;
>>      NSDictionary* attributes;
>>      NSMutableParagraphStyle* parsty;
>>
>>      oldFooter=[super pageFooter];
>> footerLength=[oldFooter length];
>> range.location=0;
>> range.length=footerLength;
>> attributes=[oldFooter
>>                            attributesAtIndex: 0
>> longestEffectiveRange: NULL
>>              inRange: range];
>> parsty=[attributes objectForKey : NSParagraphStyleAttributeName];
>> [parsty setAlignment: NSCenterTextAlignment];
>> newFooter=
>>                [[NSMutableAttributedString alloc]
>>                    initWithAttributedString: oldFooter];
>> [newFooter
>>                  addAttribute: NSParagraphStyleAttributeName
>>                          value: parsty
>>                          range: range];
>> return newFooter;
>> }