<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body text="#000000" bgcolor="#FFFFFF"> Hi, I can't make sense of the situation. From the preference browser: <ul> <li>when visiting the #gui category, action map for the drop down list is fine.</li> <li>when visiting the #programming category, action map for the same drop down lists of other preferences is corrupted (missing arguments).</li> </ul> The used code is the same when browsing these categories. I commited the code in ui/tools/preferenceBrowser repo with an inspect to observe this difference of behavior: <pre>visitArrayPreference: aPref | list listMorph | aPref isTypeAClass ifTrue: [^ self visitArrayClassPreference: aPref]. listMorph _ DropDownListMorph model: (list _ ListModel with: aPref type) listGetter: #list indexGetter: #listIndex indexSetter: #listIndex: :: autoDeselect: false; setBalloonText: aPref description. list listIndex: (aPref type indexOf: aPref value). list when: #listSelectionChanged send: #changedList:for: to: self withArguments: {list. aPref}. list actionMap inspect. views at: aPref name capitalized put: listMorph </pre> aPref (missing in some actionMap) is a preference instance, therefore stored in the PreferenceNG class. I tried to debug, actionmap build up code not easy to understand and then actionMap is not corrupted when executing step by step :-o Hilaire <div class="moz-cite-prefix">Le 21/05/2022 à 17:26, Juan Vuletich a écrit : </div> <blockquote type="cite" cite="mid:628904A4.6020002@zoho.com">The event system holds receiver and arguments weakly. If there is no other reference to them, they get garbage collected. </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>