<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body text="#000000" bgcolor="#FFFFFF"> Hi Paul, Thinking again about the topic I think the UI-Mold package (A helper tool to describe dialog panel for user input and validation) presents a situation where it could be a big advantage for simplicity to rebuild the whole UI. Indeed the field checking required hacking in the existing morph tree (see validateInput) and rebuilding the whole UI depending on the validity of the data could simplify code a a little. You may want to see how you can adapt Mold to the paradigm you are working one. Incidentally, the Mold package came from Seaside folks[2]. I adapted it for field input and validation in Cuis Morph GUI. I am planning to use it in my forthcoming revisite of the Dynabook concept, in its administrative part of school related data. Hilaire [1] <a class="moz-txt-link-freetext" href="https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-UI">https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-UI</a> [2] <a class="moz-txt-link-freetext" href="https://kentreis.wordpress.com/2008/08/27/mold-form-validation-for-seaside/">https://kentreis.wordpress.com/2008/08/27/mold-form-validation-for-seaside/</a> <div class="moz-cite-prefix">Le 13/05/2023 à 21:05, Paul D. Fernhout via Cuis-dev a écrit : </div> <blockquote type="cite" cite="mid:36e4fb16-01f1-73d1-8213-25eb6fe28481@kurtz-fernhout.com">Even with bugs and limitations, this code does show that in theory this rebuild-the-UI-on-events approach is possible in Cuis. Whether any Smalltalkers used to the conventional observer/dependency approach might eventually prefer this alternative approach for some UI development is still an open question. </blockquote> <pre class="moz-signature" cols="72">-- GNU Dr. Geo <a class="moz-txt-link-freetext" href="http://drgeo.eu">http://drgeo.eu</a> <a class="moz-txt-link-freetext" href="http://blog.drgeo.eu">http://blog.drgeo.eu</a></pre> </body> </html>