Re: Correct usage of NSTextView and NSFindBar
Re: Correct usage of NSTextView and NSFindBar
- Subject: Re: Correct usage of NSTextView and NSFindBar
- From: Kevin Perry <email@hidden>
- Date: Fri, 20 Sep 2013 10:37:18 -0700
On Sep 20, 2013, at 10:00 AM, Martin Hewitson <email@hidden> wrote:
> Dear list,
>
> I have an editor app which presents a list of files that can be edited. Selecting a file displays the text contents in an NSTextView subclass. On 10.7 and later the app supports using the FindBar. Searching the currently displayed text works fine the first time the find bar is used. But if another file is selected (so that the text in the textview changes) then the find bar shows nonsensical results, as if subsequent uses are still looking at the contents of the file that where displayed when the find bar was first invoked.
>
> Is there something I can/should do to 'reset' the find bar when the file being edited changes? I couldn't find anything in the documentation, and I couldn't figure out how to get the NSTextFinder instance that the textview is using, and even if I could, I don't see anything in the documentation to 'reset' its state, or set the string it should search.
How are you replacing the NSTextView contents when switching files? The 'reset' call for NSTextFinder when the client's content changes is -noteClientStringWillChange. NSTextView is supposed to invoke this during -shouldChangeTextInRanges:replacementStrings:. It's also invoked during -[NSLayoutManager setTextStorage:], so when you switch your NSTextView contents, you could load the new file's contents into a new NSTextStorage instance, then invoke [[textStorage layoutManager] replaceTextStorage:newTextStorage].
-KP
> Am I going about this all the wrong way? I thought this is one of those 'it just works' cases....
>
> Many thanks,
>
> Martin
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