XPost: alt.comp.lang.vb, comp.lang.basic.visual.misc   
   From: dean.earley@icode.co.uk   
      
   Dean Earley wrote:   
   > Jim Mack wrote:   
   >> Dean Earley wrote:   
   >>   
   >>> I read it as a filter.   
   >>> Include all those that like football, baseball, THEN exclude people   
   >>>   that like snooker.   
   >>> I presume from the request that people can be members of multiple   
   >>> groups.   
   >>>   
   >>> If they don't select any, they get all of them.   
   >>> If they select all of them, they get none.   
   >>   
   >> That might matter if the gamut is wider than the number of selections   
   >> listed. But if all the possibilities are shown, then not-checking   
   >> snooker is the equivalent of checking not-snooker. Anything not   
   >> included can be excluded by implication.   
   >   
   > No it's not.   
   >   
   > Person A likes football, and snooker.   
   > Person B just likes football.   
   > Person C likes snooker.   
   >   
   > With the include, then exclude, as I understand it, you will get just B   
   > because it has explicitly excluded any snooker players, but you could   
   > include A by unchecking "exclude snooker"   
   >   
   > With what you propose, you will get B, but there will be no way at all   
   > to get A and B (all football plays regardless of other sports)   
   >   
   > You would need either an "exclude X" tickbox as the OP asked or an   
   > inversion of that "I don't care about X"   
   >   
   >   
   > Having said all that, a tri state checkbox may work...   
   >   
   > Gray meaning I don't care (include ticked)   
   > Ticked meaning anyone who plays the sport (include and exclude ticked)   
   > Unticked meaning exclude anyone who plays the sport (just exclude ticked)   
      
   Sorry, those should have been:   
   Gray meaning I don't care (neither ticked)   
   Ticked meaning anyone who plays the sport (include ticked)   
   Unticked meaning exclude anyone who plays the sport (just exclude ticked)   
      
   --   
   Dean Earley (dean.earley@icode.co.uk)   
   i-Catcher Development Team   
      
   iCode Systems   
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)