[Biococoa-dev] Re: Re : Strange Selection Behavior when using a custom NSTextContainer

[Koen van der Drift]

On Mar 28, 2006, at 7:21 PM, Koen van der Drift wrote:

>
> On Mar 27, 2006, at 8:03 AM, Alexander Griekspoor wrote:
>
>> But the problem seems to be in the selection, not in drawing...
>
> That's true, but I think the selection gets it wrong because of  
> whatever happens in lineFragmentRectForProposedRect. If you let  
> that method return the value of the super instead of proposedRect,  
> you will just get one column, but the selection is fine.
>
> BTW, I am amazed how little info and knowledge is available about  
> this method. Do you want me to post it on the omni list as well?

Some more debugging (and that's it for today ;-) makes the  
NSLayoutManager's functions boundingRectForGlyphRange: and  
glyphIndexForPoint: also very suspicious. These functions return the  
wrong value for the the charindex, thus resulting in a wrong value to  
be shown (or not at all).

- Koen.