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function temp_conversion_callback( action ) 
 
% Callback function for the temp_conversion program. 
% This function uses a switch structure to route the 
% callbacks to the proper section of code.  Note the  
% code to limit each temperature to its valid range. 
 
switch action  
case 'Edit1' 
   deg_f = eval( get(gcbo,'String') ); 
   deg_f = max( [ 32 deg_f] ); 
   deg_f = min( [212 deg_f] ); 
   deg_c = to_c(deg_f); 
 
case 'Edit2' 
   deg_c = eval( get(gcbo,'String') ); 
   deg_c = max( [  0 deg_c] ); 
   deg_c = min( [100 deg_c] ); 
   deg_f = to_f(deg_c); 
 
case 'Slider1' 
   deg_c = get(gcbo,'Value'); 
   deg_f = to_f(deg_c); 
end 
    
% Now update all fields. 
Hndl = findobj(gcbf,'Tag','Edit1'); 
set (Hndl,'String',sprintf('%.1f',deg_f)); 
Hndl = findobj(gcbf,'Tag','Edit2'); 
set (Hndl,'String',sprintf('%.1f',deg_c)); 
Hndl = findobj(gcbf,'Tag','Slider1'); 
set (Hndl,'Value',deg_c);