Interfacing function
eng

##
M_SWITCH

### File content

    function [x,y,typ]=M_SWITCH(job,arg1,arg2)
    x=[];y=[];typ=[]
    select job
    case 'plot' then
      standard_draw(arg1)
    case 'getinputs' then
      [x,y,typ]=standard_inputs(arg1)
    case 'getoutputs' then
      [x,y,typ]=standard_outputs(arg1)
    case 'getorigin' then
      [x,y]=standard_origin(arg1)
    case 'set' then
      x=arg1;
      graphics=arg1.graphics;exprs=graphics.exprs
      model=arg1.model;
      while %t do
        [ok,nin,base,rule,exprs]=getvalue('Set parameters',..
    	['number of inputs';'zero base indexing (0), otherwise 1';..
    	 'rounding rule: int (0), round (1), ceil (2), floor (3)'],..
    	list('vec',1,'vec',1,'vec',1),exprs)
        if ~ok then break,end
        nin=int(nin);base=int(base);
        if nin<2 then
          message('Number of inputs must be >=2 ')
         elseif ~((base==1)|(base==0)) then
          message('base indexing must be 1 or 0')
        elseif ~((rule==1)|(rule==0)|(rule==2)|(rule==3)) then
          message('incorrect rounding rule')
        else
          [model,graphics,ok]=check_io(model,graphics,[1;-ones(nin,1)],-1,[],[])
          if ok then
    	graphics.exprs=exprs;
    	model.ipar=[base;rule],
    	x.graphics=graphics;x.model=model
    	break
          end
        end
      end
    case 'define' then
      in=[1;-1;-1]
      ipar=[1;3]
      nin=2

      model=scicos_model()
      model.sim=list('mswitch',4)
      model.in=in
      model.out=-1
      model.ipar=ipar
      model.blocktype='c'
      model.dep_ut=[%t %f]

      exprs=[string(nin);string(ipar)]

      gr_i=['d=sz(2)/(1+evstr(arg1.graphics.exprs(1)))';
       'xsegs([orig(1),orig(1)+sz(1)],[orig(2)+sz(2)-d,orig(2)+sz(2)-d])';
      'xstringb(orig(1),orig(2)+sz(2)-d,''control'',sz(1),d,''fill'')';
      'xstringb(orig(1),orig(2),[''M_Port'';''switch''],sz(1),sz(2)-d,''fill'');']
      x=standard_define([2 2],model,exprs,gr_i)
    end
    endfunction