Re: How is "Apple + Ctrl + D" implemented?

FROM : Graham Cox
DATE : Mon Apr 28 12:42:45 2008

NSTextView has this:

- (NSRange)selectionRangeForProposedRange:(NSRange)proposedSelRange 
granularity:(NSSelectionGranularity)granularity

So if the proposedSelRange is a zero-length range at the character 
index determined before, and granularity is NSSelectByWord, it should 
return the range of the word.

hth,

G. (still guessing ;-)


On 28 Apr 2008, at 8:06 pm, Ying Bian wrote:
> Graham,
>
> Thanks for your reply! But how can I "find the range of the word" 
> given
> the glyph index?  I just can not find an API doing so.
>
> So I don't think this is the underlying implementation.  Any comments
> from others?
>
> On Mon, Apr 28, 2008 at 2:51 PM, Graham Cox <graham.<email_removed>> 
> wrote:

>> I imagine it uses some API such as NSLayoutManager's:
>>
>> - (NSUInteger)glyphIndexForPoint:(NSPoint)point
>> inTextContainer:(NSTextContainer *)container
>> fractionOfDistanceThroughGlyph:(CGFloat *)partialFraction
>>
>>
>> One you have the glyph index you can find the range of the word it 
>> belongs
>> to.
>>
>> One you have the string of the word it belongs to, you can look it 
>> up in
>> dictionary.app using the Application Services API.
>>
>>
>> hth, though I am guessing to some extent.
>>
>>
>>
>> G.
>>

>
> --
> B.Y.
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