Hi, excuse me for my poor english. Exist some type of collection for bind to widgets like a listView or grid? I want say a special collection than allow know, externally, when a object is added, removed, changed the "current" etc for represent changes on a GUI. For example, I have a collection connected on a grid. When I add or remove a element on collection I have refresh the grid set again the collection like datasource, and select the same object of before. That is hard for the widget when I have very items. I want "capture", with events or others, and remove only the row of grid, and not refresh all again. I don´t know if I do the question correctly. Regards -- View this message in context: http://forum.world.st/Bindable-or-Observable-collections-on-Pharo-Smalltalk-... Sent from the Pharo Smalltalk mailing list archive at Nabble.com.