Re: First-responder action in TextEdit

FROM : Todd Ransom
DATE : Fri Jul 21 19:11:06 2006

MultiplePageView is just a container for a series of NSTextViews. The 
copy action is implemented in NSTextView.

Todd Ransom
Return Self Software
http://returnself.com



On Jul 21, 2006, at 4:27 AM, <email_removed> wrote:

>          Hello all,
>
>              As I'm trying to understand how TextEdit works, I'm 
> stuck on the
> following question :
>
>          -How does the "-copy:" first-responder action  get 
> executed in
> "Wrap to Page" mode ?
> Which object in the responder chain eventually carries it out ?
>
>    From experimenting with the source code (from /Developer/
> Examples/AppKit)
> I gathered the following :
>
>  -In "Wrap to Page" mode, the main active view is 
> MultiplePageView, whose
> superclass
> is NSView (so it does not implement a -copy: method).
>
>  -When a copy operation is performed in this mode, the "Document" 
> object
> gets
> modified along with the NSTextStorage and NSLayoutManager 
> associated to it,
> but neither of these have a -copy: method.
>
>      Perhaps I don't know how to use the debugger well enough to 
> visualize
> how the "-copy" action is performed.
>
>
>                                                                       
>          Ewan
>
>
>
>
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