CaRMtl/rene/zirkel/constructors/Circle3Constructor.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: Cicle3Constructor.java
import java.awt.event.MouseEvent;
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.Circle3Object;
import rene.zirkel.objects.PointObject;
public class Circle3Constructor extends ObjectConstructor {
PointObject P1 = null, P2 = null, P3 = null;
@Override
public void mousePressed(final MouseEvent e, final ZirkelCanvas zc) {
if (!zc.Visual)
return;
if (P1 == null) {
P1 = select(e.getX(), e.getY(), zc, e.isAltDown());
if (P1 != null) {
P1.setSelected(true);
zc.repaint();
}
showStatus(zc);
} else if (P2 == null) {
P2 = select(e.getX(), e.getY(), zc, e.isAltDown());
if (P2 != null && P2 != P1) {
P2.setSelected(true);
zc.repaint();
}
showStatus(zc);
} else {
P3 = select(e.getX(), e.getY(), zc, e.isAltDown());
if (P3 != null) {
final Circle3Object c = new Circle3Object(zc.getConstruction(),
P1, P2, P3);
zc.addObject(c);
c.setDefaults();
c.updateCircleDep();
P1 = P2 = P3 = null;
zc.clearSelected();
showStatus(zc);
}
}
}
@Override
public boolean waitForLastPoint() {
return P1 != null && P2 != null;
}
@Override
public void finishConstruction(final MouseEvent e, final ZirkelCanvas zc) {
P3 = select(e.getX(), e.getY(), zc, e.isAltDown());
if (P3 != null) {
final Circle3Object c = new Circle3Object(zc.getConstruction(), P1,
P2, P3);
zc.addObject(c);
c.setDefaults();
zc.validate();
zc.repaint();
P3 = null;
}
}
public PointObject select(final int x, final int y, final ZirkelCanvas zc, boolean altdown) {
return zc.selectCreatePoint(x, y, altdown);
}
@Override
public void reset(final ZirkelCanvas zc) {
super.reset(zc);
if (zc.Visual) {
P1 = P2 = P3 = null;
showStatus(zc);
} else {
zc.setPrompt(Global.name("prompt.circle3"));
}
}
@Override
public void showStatus(final ZirkelCanvas zc) {
if (P1 == null)
zc.showStatus(Global.name("message.circle3.first",
"Circle: Choose the first radius point!"));
else if (P2 == null)
zc.showStatus(Global.name("message.circle3.second",
"Circle: Choose the second radius point!"));
else
zc.showStatus(Global.name("message.circle3.midpoint",
"Circle: Choose the midpoint!"));
}
@Override
public boolean construct(final XmlTree tree, final Construction c)
throws ConstructionException {
if (!testTree(tree, "Circle3"))
return false;
final XmlTag tag = tree.getTag();
if (!tag.hasParam("midpoint") || !tag.hasParam("from")
|| !tag.hasParam("to"))
throw new ConstructionException("Circle3 parameters missing!");
try {
final PointObject p1 = (PointObject) c.find(tag
.getValue("midpoint"));
final PointObject p2 = (PointObject) c.find(tag.getValue("from"));
final PointObject p3 = (PointObject) c.find(tag.getValue("to"));
final Circle3Object o = new Circle3Object(c, p2, p3, p1);
if (tag.hasParam("partial"))
o.setPartial(true);
if (tag.hasParam("start") && tag.hasParam("end"))
o.setRange(tag.getValue("start"), tag.getValue("end"));
setName(tag, o);
set(tree, o);
c.add(o);
setConditionals(tree, c, o);
} catch (final ConstructionException e) {
throw e;
} catch (final Exception e) {
throw new ConstructionException("Circle3 parameters illegal!");
}
return true;
}
}