Re: Issues with NSTextView Attachments
Re: Issues with NSTextView Attachments
- Subject: Re: Issues with NSTextView Attachments
- From: Gordon Apple <email@hidden>
- Date: Thu, 22 Aug 2013 13:48:15 -0500
- Thread-topic: Issues with NSTextView Attachments
I¹ve successfully managed to override Paste and PerformDrag to embed images
which are resizable and with specified fractional (fraction of
height)baseline offsets. They also archive and unarchive properly. I¹m
using a custom TextAttachmentextCell which archives the size and the
fractional baseline offset, and returns the appropriate values to draw
properly. Undo/redo even works. However, it¹s still not right. I cannot
copy/pasts or drag/drop a text segment containing the attachment without
losing the attachment. NSTextView¹s handling of images, without my
enhancements, does this correctly. So what am I missing?
I don¹t really understand the various ³fix² methods. When I did my own text
editor (pre-OSX), which was uses in some Mayo Clinic multimedia CDs, I
handled all this automatically when pasting, etc. I did put in a
fixAttachmentAttributeInRange call after insertion. That didn¹t help.
On 8/10/13 12:31 PM, "Gordon Apple" <email@hidden> wrote:
> Using NSTextView¹s native ability to embed image attachments, we have
> successfully implemented resizing of the image by using a resizable frame with
> a drag handle, and using setSize on the NSImage. Works great. Only one
> problem, re-archiving the NSAttributableString loses the image size change.
> Any way to fix this? Internally, in a CoreData auxiliary file folder, we
> archive NSAttributableString. Would we be better off storing it as RTFD?
>
> I also see allusions to subclasses of NSTextAttachment, but I see no way to
> tell NSTextView, or its associates, to use such a subclass.
> NSTextAttachmentCell is a protocol. But who adopts this protocol? For an
> image, is this really a NSImageCell adopting this protocol? Or is it the
> NSTextAttachment? Confusion here. Documentation on attachments is sparse.
>
> We would also like to have the ability to set the baseline when an image is
> inserted, and change it when the image is resized. Certain NSPDFImageReps
> contain baseline info in private dictionaries, which we would like to use,
> when available. In view of the above, should we abandon NSTextView¹s
> paste/drag-in capabilities for images and override all the relevant methods to
> do our own attachment inserts using a custom NSAttachment class?
>
> Related question about NSImage. I¹ve never understood setSize in NSImage.
> Does this just affect the cached image, or does it have any impact on the
> underlying imageRep, such as resizing and remapping a bitmap?
>
> One more: I¹ve never found a straightforward way to make a textView re-layout
> all or a portion of the text. The best way I¹ve found is to call
> textContainerChangedGeometry. Works, but seems rather obtuse.
>
> Inquiring minds need to know.
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden