118 lines
3.5 KiB
Java
118 lines
3.5 KiB
Java
/*
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Copyright 2006 Rene Grothmann, modified by Eric Hakenholz
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This file is part of C.a.R. software.
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C.a.R. is a free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, version 3 of the License.
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C.a.R. is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package rene.zirkel.constructors;
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// file: MidpointConstructor.java
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import rene.util.xml.XmlTag;
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import rene.util.xml.XmlTree;
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import rene.gui.Global;
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import rene.zirkel.ZirkelCanvas;
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import rene.zirkel.construction.Construction;
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import rene.zirkel.construction.ConstructionException;
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import rene.zirkel.objects.ConstructionObject;
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import rene.zirkel.objects.MidpointObject;
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import rene.zirkel.objects.PointObject;
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public class MidpointConstructor extends LineConstructor {
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@Override
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public ConstructionObject create(final Construction c,
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final PointObject p1, final PointObject p2) {
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return new MidpointObject(c, p1, p2);
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}
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@Override
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public void showStatus(final ZirkelCanvas zc) {
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if (P1 == null)
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zc.showStatus(Global.name("message.midpoint.first",
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"Midpoint: Set the first point!"));
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else
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zc.showStatus(Global.name("message.midpoint.second",
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"Midpoint: Set the second point!"));
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}
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@Override
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public boolean construct(final XmlTree tree, final Construction c)
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throws ConstructionException {
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if (!testTree(tree, "Midpoint"))
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return false;
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final XmlTag tag = tree.getTag();
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if (!tag.hasParam("first") || !tag.hasParam("second"))
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throw new ConstructionException("Line points missing!");
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try {
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final PointObject p1 = (PointObject) c.find(tag.getValue("first"));
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final PointObject p2 = (PointObject) c.find(tag.getValue("second"));
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final MidpointObject p = new MidpointObject(c, p1, p2);
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PointConstructor.setType(tag, p);
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setName(tag, p);
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set(tree, p);
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c.add(p);
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setConditionals(tree, c, p);
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} catch (final ConstructionException e) {
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throw e;
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} catch (final Exception e) {
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throw new ConstructionException("Midpoint points illegal!");
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}
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return true;
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}
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@Override
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public String getPrompt() {
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return Global.name("prompt.midpoint");
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}
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@Override
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public String getTag() {
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return "Midpoint";
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}
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@Override
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public void construct(final Construction c, final String name,
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final String params[], final int nparams)
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throws ConstructionException {
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if (nparams != 2)
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throw new ConstructionException(Global.name("exception.nparams"));
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final ConstructionObject P1 = c.find(params[0]);
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if (P1 == null)
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throw new ConstructionException(Global.name("exception.notfound")
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+ " " + params[0]);
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if (!(P1 instanceof PointObject))
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throw new ConstructionException(Global.name("exception.type") + " "
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+ params[0]);
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final ConstructionObject P2 = c.find(params[1]);
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if (P2 == null)
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throw new ConstructionException(Global.name("exception.notfound")
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+ " " + params[1]);
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if (!(P2 instanceof PointObject))
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throw new ConstructionException(Global.name("exception.type") + " "
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+ params[1]);
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final MidpointObject s = new MidpointObject(c, (PointObject) P1,
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(PointObject) P2);
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if (!name.equals(""))
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s.setNameCheck(name);
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c.add(s);
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s.setDefaults();
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}
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}
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