Hi Christian, OK, I see. Yes, it's quite easy to add in a way you suggested. Be done asap. Regards. Valeriy > Dear Valeriy > > Your example is a TGComboBox, but I mean TGListBox. > Assume, that the vertical size of TGListBox has space for > ten entries, but it does only contain 4 entries. Clicking on > one entry selects this entry, but clicking in the empty space > below the entries deselects the selected entry. In this case > Selected() should emit -1. > > Best regards > Christian > > Valeriy Onuchin wrote: > > > Hi Christian, > >this question is not clear for me. Check HTML listbox > >("Modified within the last:") in > >http://carrot.cern.ch/CarrotExamples/FormTest.C > >it has an empty entry for deselecting items. Is this effect what > >you talking about? > > > >Thanks. Regards. Valeriy > > > > > > > > > >>Dear Rooters > >> > >>I would like to enable a button only, when I select an item in > >>TGListBox, but disable the button when deselecting all items > >>by clicking in the white space. > >>Sorrowly, the signal TGListBox::Selected() is only emitted, > >>when an item is selected. Is there a way to deselect the button? > >> > >>I am not sure but maybe adding the following in TGListBox:: > >>ProcessMessage() could help: > >> if(entry) > >> ...... > >> Selected((Int_t) parm1); > >> else > >> Selected((Int_t) -1); > >> > >>Thank you in advance > >>Best regards > >>Christian > >>_._._._._._._._._._._._._._._._ > >>C.h.i.s.t.i.a.n S.t.r.a.t.o.w.a > >>V.i.e.n.n.a A.u.s.t.r.i.a > >>_._._._._._._._._._._._._._._._ > >> > >> > >> > >> > >> > > > > > > > > > > > > >
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