[Octave-bug-tracker] [bug #57212] getappdata should search for the struct fieldname "ApplicationData" within figure objects for Matlab compatibility

[Kai Torben Ohlhus]

Update of bug #57212 (project octave):

                 Summary: Matlab incompatibility in getappdata() when opening
GUIDE-built .fig files => getappdata should search for the struct fieldname
"ApplicationData" within figure objects for Matlab compatibility

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Follow-up Comment #9:

Agree to both of you Guillaume comment #6 and Markus comment #8.  Octave is
far from full GUIDE support and I don't want to address bug #44282 here. 
Neither we should aim to support Matlab/Octave "mishmash".  Matlab
compatibility is a moving target of Octave, which should *not* come at any
price.

While figuring out the problem of this item, the very small Matlab detail of
comment #5 became apparent and I see two ways to handle the difference between
fiendname "ApplicationData" (Matlab) and "__appdata__" (Octave):

1. Won't fix.  Octave decided for another name.
2. Let getappdata look for both fields.  Mishmash, when saving this figure and
opening in Matlab again.
3. Break downwards compatibility with older Octave versions and rename that
field according to Matlab.

I was fine with 1. or 2.

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