> If your UI is based on multi selection (and Nautilus definitely is) you > should not register to whenSelectedIndexChanged:/whenSelectedItemChanged:, > but only the plural version. >
Ok, I get that. Still, when you create a NewList you have to provide a setIndexSelector, for example in the CategoryWidget I am doing: categoriesList := NewList on: self getItemsSelector: #getCategories setIndexSelector: #selectedCategoryIndex: getDisplaySelector: #categoryWrapper:. So, every time you click on the categories list (both selecting multiple categories or not) the CategoryWidget receives the #selectedCategoryIndex: message. The current selectedCategoryIndex: message reads like this: selectedCategoryIndex: anInteger | anObject | anObject := self getCategories at: anInteger ifAbsent: [ nil ]. self model selectedCategory: anObject. self changed: #selectedCategoryIndex. self model categorySelectionChanged. self model changed: #currentHistoryIndex. Also the NewList is in the list of dependents of the CategoryWidget, so it also gets the #update: message Is this right?
