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sizeWithAttributes: maxWidth:...?
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Ghoser777
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Join Date: Dec 2000
Location: Chicago, Illinois
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Jun 12, 2004, 11:19 AM
 
Howdy all. I have a funny feeling this have been covered before, but it's early on a saturday and my data processing skills aren't the best right now I want to find out have big a String will be when I draw with a set of attibutes in an NSCell. sizeWithAttrubutes: works, except for that my NSCell subclass has a maxWidth, so if the String is too big, it begins to wrap. But sizeWithAttributes: doesn't take into account trying to draw the String in a boundede environment like that, so it never returns an NSSize with a height different between a 10 letter word and a 100 letter word.

I'm guesing I can have some fun String parsing ahead of me. Anyone got any code already written or posted somewhere? If not, I'll just get down an dirty with NSString again.

Anyone, this sounds like a good addition for Apple to add to the NSString class.

Thanks,
Matt Fahrenbacher
     
Ghoser777  (op)
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Join Date: Dec 2000
Location: Chicago, Illinois
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Jun 12, 2004, 01:21 PM
 
Here would be my solution (thought of after my morning run)

It seems to work so far...

Code:
- (NSSize)string: (NSString *)msg sizeWithAttributes: (NSDictionary *)dict maxWidth: (int)width { NSMutableString *str = [NSMutableString string]; NSSize strSize; int i; for(i=0; i<[msg length]; i++) { char c = [msg characterAtIndex:i]; [str appendFormat:@"%c",c]; strSize = [str sizeWithAttributes:textAttributes]; if(strSize.width > width) { //our problem depends on a couple of things... //no problem - just remove and re-add new line character if([[NSCharacterSet whitespaceAndNewlineCharacterSet] characterIsMember:c]) [str replaceCharactersInRange:NSMakeRange([str length]-1,1) withString:@"\n"]; else { //we either need to find the first white space on the current line (if applicable) int j; char d = 0; for(j=[str length]-1; j>=0; j--) { d = [str characterAtIndex:j]; if([[NSCharacterSet whitespaceAndNewlineCharacterSet] characterIsMember:d]) break; } if(d == '\n' || j < 0) //no white space found - time to just add a new line { [str replaceCharactersInRange:NSMakeRange([str length]-1,1) withString:@"\n"]; [str appendFormat:@"%c",c]; } else //white space located! { //replace the white space with a new line [str replaceCharactersInRange:NSMakeRange(j,1) withString:@"\n"]; } } } } return strSize; }
     
   
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