bugGNU Octave - Bugs: bug #54918, uicontrol: validation of cdata...


bug #54918: uicontrol: validation of cdata property

Submitted by:  Guillaume <gyom>
Submitted on:  Tue 30 Oct 2018 03:10:57 PM UTC  
Category:  Plotting with OpenGL Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Unexpected Error
Status:  Fixed Assigned to:  Rik <rik5>
Originator Name:  Guillaume Open/Closed:  Closed
Release:  dev Operating System:  Any

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Tue 30 Oct 2018 06:50:38 PM UTC, comment #4: 

I checked in a better and more complete fix here (https://hg.savannah.gnu.org/hgweb/octave/rev/d7e2fd922288).  The problem with only adding "dim_vector (0,0)" is that this disabled any 2-D checking.  It was then possible to set cdata to ones (1,2) which was meant to be excluded since only RGB data can be used for the "cdata" property of a uicontrol object.

I think this is fixed now, although we can re-open it if you encounter further errors.

Rik <rik5>
Project AdministratorIn charge of this item.
Tue 30 Oct 2018 06:11:19 PM UTC, comment #3: 

I was also about to suggest adding a dim_vector (0, 0) constraint for cdata.  That seems to be what other array properties have.  Is some other trouble caused by doing that?

John W. Eaton <jwe>
Project Administrator
Tue 30 Oct 2018 06:07:22 PM UTC, comment #2: 

Thanks for looking into this, Rik.
Your change below fixes the problem for me:
but I guess you find the checks too lenient now?

Guillaume <gyom>
Tue 30 Oct 2018 05:46:53 PM UTC, comment #1: 

This is way trickier than it first appeared.  I have some idea of how to fix it, but it means larger changes for how constraints are processed.

Rik <rik5>
Project AdministratorIn charge of this item.
Tue 30 Oct 2018 03:10:57 PM UTC, original submission:  

It seems that the validation of an uicontrol cdata property is a bit too tight as it doesn't allow an empty array []:

>> figure, h = uicontrol ();
>> get (h, "cdata")
ans = [](0x0)
>> set (h, "cdata", [])
error: invalid value for array property "cdata"
>> set (h, "cdata", zeros(0,0,0))

i.e. it does not allow its own default value.

I assume the fix is about changing this line:
but am not sure exactly how.

Guillaume <gyom>


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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2018-10-30 rik5 StatusIn Progress => Fixed
        Open/ClosedOpen => Closed
    2018-10-30 rik5 StatusNone => In Progress
        Assigned toNone => rik5

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