I would like to save screenshots from my program (as an image), with
additional text data underneath, in the same file.
Using the OS-X 'screencapture' utility I can either create a PNG or
PDF file, or send one of these to the clipboard.
I found several classes to import data from the clipboard
(NSPasteBoard), and the NSAttributedString class which can write an
RTFD file. That would be OK for this purpose. However, currently I
can't get it to work.
Question: how can I store an image and some text in one file in the
most convenient (simple) way? Which file format should it be, PDF or
RTFD, or something else?
The following code extracts the (pdf) data from the pasteboard, and
then attempts to create an RTFD file wrapper out of it.
NSMutableAttributedString's initWithData call gives 'plain text'
back in the documentAttributes dict, meaning it didn't recognize the
PDF type. The rest does not produce a sensible RTFD file.
What you're doing in this code doesn't make sense. You can't turn a
PDF into an RTFD just by throwing the raw PDF data at
[NSMutableAttributedString initWithData:] and shouting
"Catch!" (metaphorically). I haven't used the text system enough to be
exactly sure of the details, but I believe you'll have to create a
text attachment for the image to go into.
Also, I'm not sure why you're using the screencapture utility here.
You can ask a window's contentView to render itself to an image, which
is a lot "friendlier" than overwriting the user's pasteboard with your
screenshot. Alternatively, if you're on 10.5, there are some new APIs
(CGWindowListCreateImage) that'll let you capture a window directly to
an image.
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