CB: typo: on “Show” the .and( ) basically makes the .es = to the .es_Selected [but they are not the same entity selection].
— > On Sep 23, 2019, at 4:35 AM, Chris Belanger <[email protected]> wrote: > > I have a listBox with an Entity Selection as its dataSource. > I want to support standard ‘set manipulations’ such as HIDE, SHOW, SHOW > ALL, SELECT ALL [yes, I realize these are not 4D sets, but > collections…terminology…] > > Given that: > Form.es = entity selection displayed in the ListBox > Form.es_Selection = “Selected Items” in the listbox > > I am able to easily HIDE or SHOW the "Selected Items” > : ($1.parameter="Hide") > Form.es:=Form.es.minus(Form.es_Selected) // remove the > selection > Form.es_Selected:=Form.es.getDataClass().newSelection() // > change this to a NEW BLANK selection > > : ($1.parameter="Show") > Form.es:=Form.es.and(Form.es_Selected) // remove the selection > Form.es_Selected:=Form.es.getDataClass().newSelection() // > change this to a NEW BLANK selection > > > but “SELECT ALL” is giving me issues. > I can easily set the ‘Selected Items’ to be the same as the Entity Selection > Form.es_Selected:=Form.es.or(Form.es_Selected) // select all the records > > > but even though this makes the ‘Selected Items’ the same as the entity > selection. It is not reflected in the appearance of the listBox (i.e. all > rows are NOT selected as desired) > I also tried: > INVOKE ACTION(ak select all) — no affect > > also tried: > Form.es_Selected:=Form.es.or(Form.es_Selected) // select all the records > > Form.es:=Form.es // cause a re-draw — BUT IT DOESN’T! > > ---- > So does anyone know how to simulate SELECT ALL in a listbox that has an > entity Selection as a datasource? > > thanks, > Chris ********************************************************************** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:[email protected] **********************************************************************
