99 lines
3.0 KiB
Java
99 lines
3.0 KiB
Java
//This file is part of SECONDO.
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//Copyright (C) 2004, University in Hagen, Department of Computer Science,
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//Database Systems for New Applications.
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//SECONDO is 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; either version 2 of the License, or
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//(at your option) any later version.
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//SECONDO 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 SECONDO; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package viewer.hoese.algebras;
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import java.awt.geom.*;
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import java.awt.*;
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import sj.lang.ListExpr;
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import java.util.*;
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import viewer.*;
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import viewer.hoese.*;
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import tools.Reporter;
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/**
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* The displayclass of the PointRectangle algebras rectangle datatype.
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*/
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public class Dsplrectangle extends DisplayGraph {
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/** The internal datatype representation */
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Rectangle2D.Double rect;
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/**
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* Scans the numeric representation of a point datatype
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* @param v the numeric value of the x- and y-coordinate
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* @see sj.lang.ListExpr
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* @see <a href="Dsplpointsrc.html#ScanValue">Source</a>
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*/
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private void ScanValue (ListExpr v) {
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double koord[] = new double[2];
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if (v.listLength() != 4) {
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Reporter.writeError("Error: No correct rectangle expression: 4 elements needed");
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err = true;
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return;
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}
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if ((v.first().atomType() != ListExpr.INT_ATOM) || (v.second().atomType()
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!= ListExpr.INT_ATOM) || (v.third().atomType() != ListExpr.INT_ATOM)
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|| (v.fourth().atomType() != ListExpr.INT_ATOM)) {
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Reporter.writeError("Error: No correct rectangle : 4 INTs needed");
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err = true;
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return;
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}
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if (!err) {
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rect = new Rectangle2D.Double(v.first().intValue(),v.third().intValue(),v.second().intValue()-v.first().intValue(),
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v.fourth().intValue()-v.third().intValue());
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}
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}
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/**
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* Init. the Dsplrectangle instance.
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* @param type The symbol rectangle
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* @param value The 4 INTs of a rectangle left,right,top,bottom.
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* @param qr queryresult to display output.
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* @see generic.QueryResult
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* @see sj.lang.ListExpr
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* @see <a href="Dsplrectanglesrc.html#init">Source</a>
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*/
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public void init (String name, int nameWidth, int indent, ListExpr type, ListExpr value, QueryResult qr) {
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AttrName = extendString(name, nameWidth, indent);
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ScanValue(value);
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if (err) {
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Reporter.writeError("Error in ListExpr :parsing aborted");
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qr.addEntry(new String("(" + AttrName + ": GA(rectangle))"));
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return;
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}
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else
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qr.addEntry(this);
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}
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public int numberOfShapes(){
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return 1;
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}
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public Shape getRenderObject(int num, AffineTransform at){
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if(num!=0){
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return null;
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}
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return rect;
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}
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}
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