Problem:
--------
Let's say I have 2 windows:
+-------------------+ +-------------------+
+-------------------+ +-------------------+
| | | |
| +-----+ | | |
| | A | | | |
| +-----+ | | |
| | | |
+-------------------+ +-------------------+
When I drag item A from the window on the left to the window on the
right, I want to do this:
When the drop is validated in the right window (type of item
accepted), I would like to either display a window above the right
window or change the right window content to give the user a list of
more detailed possible drop locations.
Something like this:
+-------------------+ +-------------------+
+-------------------+ +--------+----------+
| | | | |
| +-----+ | | | |
| | A | | | Left | Right |
| +-----+ | | | |
| | | | |
+-------------------+ +--------+----------+
There's something like this in Final Cut Pro (http://www.geniusdv.com/
news_and_tutorials/assets_c/2009/04/superimpose3-
thumb-394x397-2264.gif).
Question:
---------
How could this be achieved in Cocoa?
I have tried with a window but the target of the drop does not get
changed.
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