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" <g...@ed4u.com> 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 (Cocoa-dev@lists.apple.com) 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
