[Octave-bug-tracker] [bug #57212] Figure import should map field name "ApplicationData" to "__appdata__" for Matlab compatibility.

[Kai Torben Ohlhus]

Update of bug #57212 (project octave):

                 Summary: getappdata should search for the struct fieldname
"ApplicationData" within figure objects for Matlab compatibility => Figure
import should map field name "ApplicationData" to "__appdata__" for Matlab
compatibility.

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Follow-up Comment #11:

> I'm not sure we can save .fig files in Octave that can be opened in Matlab.
Please, correct me if I'm wrong.

No correction is necessary.  At work, I just tried again without success. 
When using


>> h = openfig ("TestGUI.fig");
>> savefig (h, "TestGUI_octave.fig");


the latter one cannot be opened with MATLAB R2019a.  Same holds for
hgsave-hgload with the options "-binary", "-text", "-v7", and "-v6".

You are right, Markus.  Doing the mapping in the import functions seems
smarter to me too.  The error in getappdata is just a result of an
incompatible naming convention.  The interface between Matlab and Octave are
the import functions in this case.

Pantxo also touched this struct field recently in bug #57211 basically to hide
it.

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