Interfacing function
eng

##
CLKINV_f

### File content

    function [x,y,typ]=CLKINV_f(job,arg1,arg2)
    // Copyright INRIA
    x=[];y=[];typ=[]
    select job
    case 'plot' then
      orig=arg1.graphics.orig;
      sz=arg1.graphics.sz;
      gr_i=arg1.graphics.gr_i;

      prt=arg1.model.ipar
      pat=xget('pattern');xset('pattern',default_color(-1))
      thick=xget('thickness');xset('thickness',2)
      x=orig(1)+sz(1)*[1/2;1;  1;0;0  ]
      y=orig(2)+sz(2)*[0;  1/3;1;1;1/3]
      xo=orig(1);yo=orig(2)+sz(2)/3

      if type(gr_i)==15 then
        coli=gr_i(2);
        xfpolys(x,y,coli);
        pcoli=xget('pattern');xset('pattern',coli)
        xstringb(xo,yo,string(prt),sz(1),sz(2)/1.5)
        xset('pattern',pcoli)
        xstringb(xo,yo,string(prt),sz(1),sz(2)/1.5)
      else
        xstringb(xo,yo,string(prt),sz(1),sz(2)/1.5)
        xpoly(x,y,'lines',1)
      end

      xset('thickness',thick)
      xset('pattern',pat)
      //identification
      ident = arg1.graphics.id
      if ident <> [] & ident <> '' then
        font=xget('font')
        xset('font', options.ID(1)(1), options.ID(1)(2))
        rectangle = xstringl(orig(1), orig(2)+3/2*sz(2), ident)
        w = rectangle(3)
        h = rectangle(4)
        xstringb(orig(1) + sz(1)/2 -w/2, orig(2)+sz(2)+h/2 , ident , w, h)
        xset('font', font(1), font(2))
      end
    case 'getinputs' then
      x=[];y=[];typ=[]
    case 'getoutputs' then
      orig=arg1.graphics.orig
      sz=arg1.graphics.sz
      x=orig(1)+sz(1)/2
      y=orig(2)
      typ=-ones(x)
    case 'getorigin' then
      [x,y]=standard_origin(arg1)
    case 'set' then
      x=arg1;
      graphics=arg1.graphics
      model=arg1.model

      exprs=graphics.exprs
      exprs=exprs(1) // compatibility
      while %t do
        [ok,prt,exprs]=getvalue('Set Event Input block parameters',..
    	'Port number',list('vec',1),exprs)
        prt=int(prt)
        if ~ok then break,end
        if prt<=0 then
          message('Port number must be a positive integer')
        else
          model.ipar=prt
          model.evtout=1
          model.firing=-1//compatibility
          graphics.exprs=exprs
          x.graphics=graphics
          x.model=model
          break
        end
      end
    case 'define' then
      prt=1
      model=scicos_model()
      model.sim='input'
      model.evtout=1
      model.ipar=prt
      model.blocktype='d'
      model.firing=-1
      model.dep_ut=[%f %f]

      exprs=string(prt)
      gr_i=['xo=orig(1);yo=orig(2)+sz(2)/3';
            'xstringb(xo,yo,string(prt),sz(1),sz(2)/1.5)']
      x=standard_define([1 1.5],model,exprs,gr_i)
    end
    endfunction