Matlab update popmenu string - matlab

Question

I have a GUI which has a lot of menus associated with radiobuttons. Menus or popmenus will be available to edit or select only if the radiobuttons next to them is selected.
Among these menus I have 2 popmenus associated to a radiobutton. In the first popmenu I have set up in the string 3 different choices and if I take choice 1 and 2 the second popmenu will propose a string with 5 choice. But if I select choice 3 in the second popmenu I have only it will change the string of the popmenu 2 and all the proposition will be different.
To do that I have a function which works but the only problem is that to see the change of string in the popmenu 2 I need to unselect and select again the radiobutton. Is there a way to refresh the popmenu 2 choices when I change the selection in popmenu 1?
function h0=exemple
%KGUI4N construction de la boite de dialogue pour KGEXEC4N
%CAVIAR2, © ALSTOM + OL 1999/12-2003/03
blanc=[1 1 1];
gris=blanc*0.75;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%figure
h0=figure(...
'Units','characters',...
'DefaultUicontrolUnits','characters',...
'Color',gris,...
'IntegerHandle','off',...
'MenuBar','none',...
'Name','Norme harmonique',...
'NumberTitle','off',...
'Position',[100 30 110 25],...
'Resize','on',...
'Tag','NormeDlg',...
'WindowStyle','modal',...
'ToolBar','none');
%titre
uicontrol(h0,'Style','text',...
'BackgroundColor',gris,...
'HorizontalAlignment','center',...
'Position',[10 22 85 1],...
'String','Choix du gabarit à tracer en superposition sur les spectres');
%bouton OK
uicontrol(h0,...
'BackgroundColor',gris,...
'Callback','close(gcbf)',...
'Position',[27 0.5 16 2],...
'String','OK',...
'Tag','NormeOK');
%bouton annuler
uicontrol(h0,...
'BackgroundColor',gris,...
'Callback','close(gcbf)',...
'Position',[51 0.5 16 2],...
'String','Annuler');
%bouton aide
uicontrol(h0,...
'BackgroundColor',gris,...
'Position',[75 0.5 7 2],...
'String','?');
%Buttongroup1
bg = uibuttongroup('Visible','on',...
'BackgroundColor',gris);
%Aucune
ra(1) = uicontrol(bg,'Style','radiobutton',...
'BackgroundColor',gris,...
'Position',[5 19 30 1.7],...
'String','Aucun',...
'Tag','Norme0');
uicontrol(h0,'Style','text',...
'HorizontalAlignment','left',...
'BackgroundColor',gris,...
'Position',[35 19.35 7 1],...
'String','--',...
'Tag','Param0');
%IEEE519
ra(2) = uicontrol(bg,'Style','radiobutton',...
'BackgroundColor',gris,...
'Position',[5 17 30 1.7],...
'String','IEEE519 (2014)',...
'Tag','Norme519',...
'TooltipString','Param519-1');
prmsA{2} = uicontrol(h0,'Style','popupmenu',...
'BackgroundColor',blanc,...
'Position',[35 17 17 1.7],...
'String',['120V-69kV|70-161kV|162kV & +'],...
'Tag','Param519-1',...
'TooltipString','Niveau de tension considéré',...
'Value',1,...
'Enable','off');
prmsA{2}(2)=uicontrol(h0,'Style','popupmenu',...
'BackgroundColor',blanc,...
'Position',[53 17 18 1.7],...
'String','???',...
'Tag','Param519-2',...
'TooltipString','ISC/IL = courant de court-circuit sur courant maximum',...
'Value',1,...
'Enable','off');
set(bg,'SelectionChangeFcn',#(o,e)bgChangeFcn(o,e,prmsA))
movegui(h0,'center')
function bgChangeFcn(src,event,prms)
allprms = [prms{:}];
set(allprms,'Enable','off');
lbl=get(event.NewValue,'TooltipString');
if strcmp(lbl, 'Param519-1')
hno=[findobj(allprms,'Tag','Param519-1')
findobj(allprms,'Tag','Param519-2')];
Scr519(hno(1:2));
else
set(findobj(allprms,'Tag',lbl),'Enable','on');
end
function enable(h)
set(h,'Enable','on')
%%%%%%%%%%%%
function Scr519(h)
enable(h)
x=get(h(2),'Value');%n° ISC/IL en cours
switch get(h(1),'Value')
case {1,2}
if (x<1)||(x>5),x=1;end
ch='Iscr<20|20<Iscr<50|50<Iscr<100|100<Iscr<1k|1000<Iscr';
drawnow
case 3
if (x<1)||(x>3),x=1;end
ch='Iscr<25|25<Iscr>50|Iscr>=50';
drawnow
otherwise
error(kverranorm(6))
end
set(h(2),'String',ch,'Value',x)
The function that allow to update the popmenu string is the last one. It works but I would like to see the update without having to unselect and select the radiobutton.