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PlumbConstructor.java

package rene.zirkel.constructors;

// file: PlumbConstructor.java

import rene.util.xml.XmlTag;
import rene.util.xml.XmlTree;
import rene.zirkel.*;
import rene.zirkel.construction.*;
import rene.zirkel.objects.*;

public class PlumbConstructor extends ParallelConstructor
{     public PrimitiveLineObject create (Construction c, PrimitiveLineObject l, PointObject p)
      {     return new PlumbObject(c,l,p);
      }
      public void showStatus (ZirkelCanvas zc)
      {     if (L==null) zc.showStatus(
                  Zirkel.name("message.plumb.first","Plumb Line: Choose a line!"));
            else zc.showStatus(
                  Zirkel.name("message.plumb.second","Plumb Line: Choose a Point!"));
      }
      public boolean construct (XmlTree tree, Construction c)
            throws ConstructionException
      {     if (!testTree(tree,"Plumb")) return false;
            XmlTag tag=tree.getTag();
            if (!tag.hasParam("point") || !tag.hasParam("line"))
                  throw new ConstructionException("Plumb parameters missing!");
            try
            {     PointObject p1=(PointObject)c.find(tag.getValue("point"));
                  PrimitiveLineObject p2=(PrimitiveLineObject)c.find(tag.getValue("line"));
                  PlumbObject o=new PlumbObject(c,p2,p1);
                  if (tag.hasParam("valid"))
                              o.setRestricted(false);
                  setName(tag,o);
                  set(tree,o);
                  if (tag.hasParam("partial")) o.setPartial(true);
                  c.add(o);
                  setConditionals(tree,c,o);
            }
            catch (ConstructionException e)
            {     throw e;
            }
            catch (Exception e)
            {     throw new ConstructionException("Plumb parameters illegal!");
            }
            return true;
      }
      public String getPrompt ()
      {     return Zirkel.name("prompt.plumb");
      }

      public String getTag () { return "Plumb"; }
      public void construct (Construction c, 
            String name, String params[], int nparams)
            throws ConstructionException
      {     if (nparams!=2)
                  throw new ConstructionException(Zirkel.name("exception.nparams"));
            ConstructionObject
                  P1=c.find(params[0]);
            if (P1==null)
                  throw new ConstructionException(Zirkel.name("exception.notfound")+" "+
                        params[0]);
            ConstructionObject
                  P2=c.find(params[1]);
            if (P2==null)
                  throw new ConstructionException(Zirkel.name("exception.notfound")+" "+
                        params[1]);
            if (!(P1 instanceof PrimitiveLineObject))
                  throw new ConstructionException(Zirkel.name("exception.type")+" "+
                        params[0]);
            if (!(P2 instanceof PointObject))
                  throw new ConstructionException(Zirkel.name("exception.type")+" "+
                        params[1]);
            PlumbObject s=new PlumbObject(c,
                  (PrimitiveLineObject)P1,(PointObject)P2);
            if (!name.equals("")) s.setNameCheck(name);
            c.add(s);
            s.setDefaults();
      }

}

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