> Should I be using Action to detect is an existing item is selected? Yes. You use the callback parameters to identify the newly selected item.
action = function(text, item, state) Check if state == 1, to identify if the item is being selected > (does it fire if a new item is added? No Best, Scuri Em seg, 14 de jan de 2019 às 23:12, Ranier VF <[email protected]> escreveu: > Hi, > I'm using callback VALUECHANGED_CB with list control, to populate > another list control, when user selects one item. Inside function, I use > VALUE attribute to know what item was selected. > But, my list controls don´t allow edition, or, EDITBOX=NO. > > If this can help you, I use too AttributeHandle to link one list control > with another list control, in C: > Ihandle * ih = IupGetAttributeHandle(list, "list_city_uid"); > > ih will be populated according user selection. > > Best regards, > Ranier Vilela > > ________________________________________ > De: [email protected] <[email protected]> > Enviado: segunda-feira, 14 de janeiro de 2019 12:55 > Para: [email protected] > Assunto: [Iup-users] Dropdown plus editbox -- how best to get value > > I have a list control (Place) with both dropdown and editbox true. The > user can either select an existing value or enter a new one. Using IUP 3.5 > with Lua under windows. > > If they select an existing value, I need to populate a second list control > (Address) – also dropdown and editbox – with the known addresses for the > selected Place. > > If they enter a new Place via the editbox, I need to eliminate duplicate > spaces and check if it is still a new Place. If it’s not new, I need to > select the ‘duplicate’ Place (the one they should have selected) and > populate the Address list; if it is new, I need to update a lookup table > and clear the Address list. > > I’m trying to determine the best call backs to use to implement this. > > Should I be using Action to detect is an existing item is selected? If I’m > reading the documentation correctly, because it’s an editbox, Place.VALUE > won’t tell me what the selected item is if it’s an existing item, but the > text and parameters for the Action callback will? > > Or Valuechanged? Again, Place.VALUE won’t help for an existing item. > > Or should I be using a combination – if Action fires, then an existing > item has been selected (does it fire if a new item is added?); and if > Valuechanged fires, it’s a new item? Or might they both fire, in which case > what would be the order. > > And if so, how do I define two callbacks within this (parameterised) > structure: > > function MakeList(options) > local l = iup.list{} > if options.callback ~= nil then > local callback = options.callback > local ebox = (options.editbox or "NO") == "YES" > if ebox then > l = iup.list{valuechanged_cb = function(self) callback() > end} > else > l =iup.list{killfocus_cb = function(self) callback() end } > end > end > l.editbox = options.editbox or "NO" > l.dropdown=options.dropdown or "YES" > return l > end > > > > > > > > > _______________________________________________ > Iup-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/iup-users >
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