CaRMtl/rene/zirkel/constructors/MidpointConstructor.java
2018-09-04 22:51:42 -04:00

118 lines
3.5 KiB
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: MidpointConstructor.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.MidpointObject;
import rene.zirkel.objects.PointObject;
public class MidpointConstructor extends LineConstructor {
@Override
public ConstructionObject create(final Construction c,
final PointObject p1, final PointObject p2) {
return new MidpointObject(c, p1, p2);
}
@Override
public void showStatus(final ZirkelCanvas zc) {
if (P1 == null)
zc.showStatus(Global.name("message.midpoint.first",
"Midpoint: Set the first point!"));
else
zc.showStatus(Global.name("message.midpoint.second",
"Midpoint: Set the second point!"));
}
@Override
public boolean construct(final XmlTree tree, final Construction c)
throws ConstructionException {
if (!testTree(tree, "Midpoint"))
return false;
final XmlTag tag = tree.getTag();
if (!tag.hasParam("first") || !tag.hasParam("second"))
throw new ConstructionException("Line points missing!");
try {
final PointObject p1 = (PointObject) c.find(tag.getValue("first"));
final PointObject p2 = (PointObject) c.find(tag.getValue("second"));
final MidpointObject p = new MidpointObject(c, p1, p2);
PointConstructor.setType(tag, p);
setName(tag, p);
set(tree, p);
c.add(p);
setConditionals(tree, c, p);
} catch (final ConstructionException e) {
throw e;
} catch (final Exception e) {
throw new ConstructionException("Midpoint points illegal!");
}
return true;
}
@Override
public String getPrompt() {
return Global.name("prompt.midpoint");
}
@Override
public String getTag() {
return "Midpoint";
}
@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]);
if (!(P1 instanceof PointObject))
throw new ConstructionException(Global.name("exception.type") + " "
+ params[0]);
final ConstructionObject P2 = c.find(params[1]);
if (P2 == null)
throw new ConstructionException(Global.name("exception.notfound")
+ " " + params[1]);
if (!(P2 instanceof PointObject))
throw new ConstructionException(Global.name("exception.type") + " "
+ params[1]);
final MidpointObject s = new MidpointObject(c, (PointObject) P1,
(PointObject) P2);
if (!name.equals(""))
s.setNameCheck(name);
c.add(s);
s.setDefaults();
}
}