Re: drop location feedback in NSTextView
Re: drop location feedback in NSTextView
- Subject: Re: drop location feedback in NSTextView
- From: Ken Victor <email@hidden>
- Date: Fri, 4 Nov 2005 12:42:35 -0800
works like a charm!
only change i made to your suggestion was to keep track of my flag
via draggingEntered/draggingExited instead of draggingUpdated.
bug id: 4329982.
thank you very much.
ken
At 9:49 AM -0800 11/4/05, Douglas Davidson wrote:
On Nov 3, 2005, at 2:31 PM, Ken Victor wrote:
i have a custom subclass of NSTextView. i have this because i have
some strings that i wish to be treated as if they are a single
character for purposes of selection, deletion, etc. its all working
the way i want in all cases but one. the one problematic situation
is the drop point feedback when dragging into my custom view. when
dragging into my view, the drop location feedback cursor "happily"
appears between characters of my special string when i don't want
this.
i don't see how to change this and would appreciate some help.
I don't have a good solution for you--you could file a bug on
this--but I do have a possible workaround. In your NSTextView
subclass, you could override draggingEntered: and draggingUpdated:,
and in each case set a flag noting that you are within a dragging
method. You could then subclass NSLayoutManager and make sure that
your custom text view uses your custom layout manager.
In your NSLayoutManager subclass, override
rectArrayForGlyphRange:withinSelectedGlyphRange:inTextContainer:rectCount:.
If the flag noting that you are within a dragging method is not set,
just call the super method. If the flag is set, however, check and
see whether the two glyph range arguments describe a zero-length
range inside one of your forbidden regions. If so, pick a different
zero-length glyph range in the same text container, and call the
super method with that for the two glyph range arguments instead.
Douglas Davidson
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