<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> Hi Hilaire, <div class="moz-cite-prefix">On 2026-01-27 1:53 PM, Hilaire Fernandes via Cuis-dev wrote: </div> <blockquote type="cite" cite="mid:7810acd5-7625-4838-9d1d-36182b3e729d@free.fr"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> Hi Juan, This issue is very special and most of the time unlikely. It occurs when editing by code an attribute which is normally set by GUI. As I don't want the user to be restricted by the GUI choice of color when editing by code, this issue will raise. </blockquote> And it needs to be fixed. <blockquote type="cite" cite="mid:7810acd5-7625-4838-9d1d-36182b3e729d@free.fr"> The question is do we want this kind of situation to be fixed downstream or upstream. Upstream it will be useful in other similar situation. Fixing downstream can help to make some smart things, as adding the a morph color to the dropdownlist, but it will not be a generic solution. </blockquote> In my opinion it is the drop down list who needs to know what to do in those cases. The current value is not one of the options. Adding it as an option would make sense to me. Fixing it "upstream" is a bit like modifying Array to accept out of range indexes. It will end hiding bugs. It is the kind of thing that make Perl or Javascript bad languages. <blockquote type="cite" cite="mid:7810acd5-7625-4838-9d1d-36182b3e729d@free.fr"> It can be handled in DropDownButtonMorph by catching the error, but I find this inelegant, but may be it is not the case. Hilaire <pre class="moz-signature" cols="72">-- <a class="moz-txt-link-freetext" href="http://mamot.fr/@drgeo" moz-do-not-send="true">http://mamot.fr/@drgeo</a></pre> </blockquote> That's to be decided by DropDownButtonMorph. I wouldn't call it "catching the error" but "handling absent values". <pre class="moz-signature" cols="72">-- Juan Vuletich <a class="moz-txt-link-abbreviated" href="http://www.cuis.st">www.cuis.st</a> github.com/jvuletich researchgate.net/profile/Juan-Vuletich independent.academia.edu/JuanVuletich patents.justia.com/inventor/juan-manuel-vuletich</pre> </body> </html>