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Re: Document dirty state during field edit
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Re: Document dirty state during field edit


  • Subject: Re: Document dirty state during field edit
  • From: Ashley Clark <email@hidden>
  • Date: Fri, 31 Oct 2008 12:41:50 -0500

On Oct 31, 2008, at 1:19 AM, Ashley Clark wrote:

I'm pretty sure I've seen someone ask this before but I just can't find it in Google. So I'll ask again.

I have undo/redo working throughout my program but I seem to remember earlier that upon opening a document and immediately after beginning to change the state of a text field that the document dirty status would be changed, before an actual undo was registered on the undo stack. (As a result of -objectDidBeginEditing:?)

Somehow I've disabled this behavior and for the life of me I can't determine what I've done wrong or how to get that behavior back.

Does anyone have any clues?

After a lot of stepping through the debugger I've seen that in new NSDocument based projects that edits happening through a controller send an -objectDidBeginEditing: to the NSDocument object via [NSValueBinder _startChanging].


In my project though, for some reason I have yet to uncover, NSValueBinder's _startChanging method checks to see if my NSWindowController subclass responds to objectDidBeginEditing: when that returns NO it stops looking and never checks my document subclass. If I implement objectDidBeginEditing and objectDidEndEditing: and have them forward those messages on to my document the document dirty state is represented correctly as it is in a new project.

So, this suggests that somehow I've mucked up the responder chain between my window controller and my document but I don't see anywhere where I might have done something like that. To be honest though, I'm not sure that I'd know how to without reading up a lot more on the responder chain anyway. Before I read up on the responder chain to see what I might have done, does anyone know if I'm on the right track here?


Ashley

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References: 
 >Document dirty state during field edit (From: Ashley Clark <email@hidden>)

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