CaRMtl/rene/zirkel/constructors/SegmentConstructor.java

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/*
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: SegmentConstructor.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.expression.Expression;
import rene.zirkel.objects.ConstructionObject;
import rene.zirkel.objects.PointObject;
import rene.zirkel.objects.SegmentObject;
public class SegmentConstructor extends LineConstructor {
boolean Fixed = false;
public SegmentConstructor() {
this(false);
}
public SegmentConstructor(final boolean fixed) {
Fixed = fixed;
}
@Override
public ConstructionObject create(final Construction c,
final PointObject p1, final PointObject p2) {
return new SegmentObject(c, p1, p2);
}
@Override
public boolean isFixed() {
return Fixed;
}
@Override
public void setFixed(final ZirkelCanvas zc, final ConstructionObject o) {
if (o instanceof SegmentObject) {
final SegmentObject s = (SegmentObject) o;
if (s.canFix())
try {
s.validate();
s.setFixed(true, "" + s.getLength());
s.edit(zc, true, true);
s.validate();
zc.repaint();
} catch (final Exception e) {
}
else {
zc.warning(Global.name("error.fixedsegment"));
}
}
}
@Override
public void showStatus(final ZirkelCanvas zc) {
if (!Fixed) {
if (P1 == null)
zc.showStatus(Global.name("message.segment.first"));
else
zc.showStatus(Global.name("message.segment.second"));
} else {
if (P1 == null)
zc.showStatus(Global.name("message.fixedsegment.first"));
else
zc.showStatus(Global.name("message.fixedsegment.second"));
}
}
@Override
public boolean construct(final XmlTree tree, final Construction c)
throws ConstructionException {
if (!testTree(tree, "Segment"))
return false;
final XmlTag tag = tree.getTag();
if(tag.hasParam("arrow"))
return false; //parceque VectorConstructor est appelé après dans l'ordre chronologique
if (!tag.hasParam("from") || !tag.hasParam("to"))
throw new ConstructionException("Segment endpoints missing!");
try {
final PointObject p1 = (PointObject) c.find(tag.getValue("from"));
final PointObject p2 = (PointObject) c.find(tag.getValue("to"));
final SegmentObject o = new SegmentObject(c, p1, p2);
setName(tag, o);
set(tree, o);
c.add(o);
setConditionals(tree, c, o);
//o.setArrow(tag.hasParam("arrow")); plus nécessaire
if (tag.hasParam("fixed")) {
try {
o.setFixed(true, tag.getValue("fixed"));
} catch (final Exception e) {
throw new ConstructionException("Fixed value illegal!");
}
}
if (tag.hasParam("code_symbol"))
o.setSegmentCode(Integer.parseInt(tag.getValue("code_symbol")));
} catch (final ConstructionException e) {
throw e;
} catch (final Exception e) {
throw new ConstructionException("Segment endpoints illegal!");
}
return true;
}
@Override
public String getPrompt() {
return Global.name("prompt.segment");
}
@Override
public String getTag() {
return "Segment";
}
@Override
public void construct(final Construction c, final String name,
final String params[], final int nparams)
throws ConstructionException {
if (nparams != 2 && nparams != 3)
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]);
ConstructionObject P2 = c.find(params[1]);
if (P2 == null) {
final Expression ex = new Expression(params[1], c, null);
if (!ex.isValid())
throw new ConstructionException(Global.name("exception.expression"));
final double x = ex.getValue();
P2 = new PointObject(c, ((PointObject) P1).getX() + x,
((PointObject) P1).getY());
c.add(P2);
P2.setDefaults();
final SegmentObject s = new SegmentObject(c, (PointObject) P1,
(PointObject) P2);
s.setDefaults();
s.setFixed(true, params[1]);
c.add(s);
if (!name.equals(""))
s.setNameCheck(name);
return;
}
if (!(P2 instanceof PointObject))
throw new ConstructionException(Global.name("exception.type") + " "
+ params[1]);
final SegmentObject s = new SegmentObject(c, (PointObject) P1,
(PointObject) P2);
if (nparams == 3) {
if (!s.canFix())
throw new ConstructionException(Global.name("exception.canfix"));
s.setFixed(true, params[2]);
if (!s.isValidFix())
throw new ConstructionException(Global.name("exception.fix")
+ " " + params[2]);
s.validate();
}
c.add(s);
s.setDefaults();
// s.setArrow(c.isVector());
if (!name.equals(""))
s.setNameCheck(name);
}
}