CaRMtl/rene/zirkel/constructors/RayConstructor.java

/* 

Copyright 2006 Rene Grothmann, modified by Eric Hakenholz

This file is part of C.a.R. software.

C.a.R. is a free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 3 of the License.

C.a.R. is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */
package rene.zirkel.constructors;

// file: RayConstructor.java
import rene.util.xml.XmlTag;
import rene.util.xml.XmlTree;
import rene.gui.Global;
import rene.zirkel.ZirkelCanvas;
import rene.zirkel.construction.Construction;
import rene.zirkel.construction.ConstructionException;
import rene.zirkel.objects.ConstructionObject;
import rene.zirkel.objects.PointObject;
import rene.zirkel.objects.RayObject;

public class RayConstructor extends LineConstructor {


    @Override
    public ConstructionObject create(final Construction c,
            final PointObject p1, final PointObject p2) {
        return new RayObject(c, p1, p2);
    }

    @Override
    public void showStatus(final ZirkelCanvas zc) {
        if (P1==null) {
            zc.showStatus(Global.name("message.ray.first",
                    "Ray: Set the root point!"));
        } else {
            zc.showStatus(Global.name("message.ray.second",
                    "Ray: Set the second point!"));
        }
    }

    @Override
    public boolean construct(final XmlTree tree, final Construction c)
            throws ConstructionException {
        if (!testTree(tree, "Ray")) {
            return false;
        }
        final XmlTag tag=tree.getTag();
        if (!tag.hasParam("from")||!tag.hasParam("to")) {
            throw new ConstructionException("Ray points missing!");
        }
        try {
            final PointObject p1=(PointObject) c.find(tag.getValue("from"));
            final PointObject p2=(PointObject) c.find(tag.getValue("to"));
            final RayObject o=new RayObject(c, p1, p2);
            if (tag.hasParam("partial")) {
                o.setPartial(true);
            }
            setName(tag, o);
            set(tree, o);
            c.add(o);
            setConditionals(tree, c, o);
        } catch (final ConstructionException e) {
            throw e;
        } catch (final Exception e) {
            e.printStackTrace();
            throw new ConstructionException("Ray points illegal!");
        }
        return true;
    }

    @Override
    public String getPrompt() {
        return Global.name("prompt.ray");
    }

    @Override
    public String getTag() {
        return "Ray";
    }

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