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[PATCH #8316] Variable Editor

From: Rüdiger Sonderfeld
Subject: [PATCH #8316] Variable Editor
Date: Thu, 13 Feb 2014 22:20:46 +0100
User-agent: KMail/4.11.5 (Linux/3.11.0-15-generic; KDE/4.11.5; x86_64; ; )


I've started writing a Variable Editor for the new GNU Octave GUI.  I have an 
initial patch ready and submitted here:


(Quoted from above)

It is not finished but I wanted some input before continuing with it.

The biggest issue right now is that the editor does not detect changes 
happening to the variable inside Octave. It will continue displaying the old 
value. I don't know if there is a way in Octave to intercept changes to 
certain variables or how this could be implemented. The simplest way would be 
to update the display completely once `octave_link::set_workspace' gets 
called. But this would only update the view when Octave has finished and is 
waiting for new input. Maybe that would be good enough at least for an initial 

There are some other issues

    Paste not working
    Inserting/removing rows/cols not working
    No support for structure arrays (completely untested)
    No subeditor opens for internal structures (but the input is eval'd so it 
is somewhat usable at the moment)
    Plotting doesn't work for cell arrays.
    Delete does not support shifting and always inserts 0 (should be [] for 
cell arrays)
    No variable from selection or transpose feature
    No window splitting
    No data brush
    No printing
    No undo support
    No sort

And a potential thread safety issue. I call `symbol_table::varval' in 
`main_window' from the GUI thread to get the `octave_value'. It could be 
safely passed via signal but that would require registering `octave_value' as 
Qt metatype and I don't know what implications that would have (See 

Please give it a try and comment.


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