There is a blog that outlines how to do this with help of Douglas Davidson:
http://www.dejal.com/blog/2007/11/cocoa-custom-attachment-text-view
The suggestion here is to use a textStorage delegate to insert the custom
attachment cell into the text. It actually relies on what seems like a bug:
if ([attachment isKindOfClass:[NSTextAttachment class]] &&
![[attachment attachmentCell]
isKindOfClass:[TATextAttachmentCell class]])
{
This is happening in
- (void)textStorageWillProcessEditing:(NSNotification *)note
What I don't understand is that before it's a TATextAttachment with a
TATextAttachmentCell, being my subclasses, and afterwards when pasting/dropping
and looking at the debugger, the objects become NSTextAttachment and its cell
respectively. Why? And how can I make it stop it from turning my subclasses
into their superclasses?
Am 16.07.2012 um 23:51 schrieb Jens Alfke:
>
> On Jul 16, 2012, at 2:15 PM, Alexander Reichstadt <[email protected]> wrote:
>
>> Is there any way to have an NSTextView to hold text and custom data-widgets
>> that are unrelated to filewrappers? I don't want NSTextAttachmentCell I
>> think, because without a file it doesn't work
>
> I have used NSTextAttachmentCell for things that are not files. Note the
> comment in NSTextAttachment.h that says "An NSTextAttachment *usually* has a
> fileWrapper" (emphasis mine). It doesn't *have* to have one.
>
> Unfortunately it's been enough years that I don't remember the details. It
> may be that you can initialize an NSTextAttachment with a nil fileWrapper, or
> to set the fileWrapper property to nil after initialization. If not, you may
> just be able to pass in an arbitrary path to some file, and then the
> NSTextAttachmentCell methods such that they don't care what the file is.
>
> —Jens
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