277 lines
7.8 KiB
Java
277 lines
7.8 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 pointsequnece .
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*/
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public class Dsplpointsequence extends DisplayGraph {
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/** paint this pointsequence as a line */
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public final static int LINE_MODE=0;
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/** paint this pointsequence as a set of points */
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public final static int POINTS_MODE=1;
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/** fill the shape */
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public static final int AREA_MODE=2;
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/** The bounding-box rectangle */
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Rectangle2D.Double bounds;
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/** The shape representing this sequence */
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GeneralPath GP1 = new GeneralPath(GeneralPath.WIND_EVEN_ODD);
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private Shape shp;
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/** because of the reason of precision, we store the points also
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in a vector **/
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Vector points;
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/** drawMode */
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int mode = LINE_MODE;
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/** method changing the paint mode of this sequence */
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public void setPaintMode(int mode){
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if(mode>=0 && mode<=2)
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this.mode = mode;
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}
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/** returns true if this sequence
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should be drawn as line **/
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public boolean isLineType(int num){
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if(mode==POINTS_MODE)
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return false;
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if(points==null)
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return false;
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if(mode==LINE_MODE)
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return points.size()>1;
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// AREA_MODE
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return points.size()==2;
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}
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/** returns true if this seuqnces consist of a single point **/
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public boolean isPointType(int num){
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if(mode==POINTS_MODE)
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return true;
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if(points==null)
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return true;
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if(mode==LINE_MODE)
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return points.size()>1;
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// AREA_MODE
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return points.size()==2;
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}
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/** returns true if this sequence is empty **/
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public boolean isEmpty(){
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return points==null || points.size()==0;
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}
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/** sets this sequence to be empty **/
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public void reset(){
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GP1.reset();
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points = null;
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}
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/** Adds a single point to this sequence.
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* The return value is true when the kind of the
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* representation is changed, e.g. from point to line.
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**/
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public boolean add(double x, double y){
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if(!ProjectionManager.project(x,y,aPoint)){
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err = true;
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return false;
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}
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if(points==null)
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points = new Vector();
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x = aPoint.x;
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y = aPoint.y;
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if(isEmpty()){
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points.add(new Dsplpoint(new Point2D.Double(x,y),this));
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GP1.moveTo((float)x,(float)y);
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bounds = new Rectangle2D.Double();
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bounds.setRect(x,y,0,0);
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return true; // changed from empty to point
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}else{
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points.add(new Dsplpoint(new Point2D.Double(x,y),this));
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GP1.lineTo((float)x,(float)y);
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double x1 = bounds.getX();
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double y1 = bounds.getY();
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double x2 = x1+bounds.getWidth();
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double y2 = y1+bounds.getHeight();
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x1 = Math.min(x1,x);
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y1 = Math.min(y1,y);
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x2 = Math.max(x2,x);
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y2 = Math.max(y2,y);
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bounds.setRect(x1,y1,x2-x1,y2-y1);
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if(mode==POINTS_MODE)
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return false;
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if(mode==LINE_MODE)
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return points.size()==2; // from point to line
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// AREA_MODE
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return points.size()==3 || points.size()==2;
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}
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}
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/**
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* Scans the representation of the sequence datatype .
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* @param v A list of segments
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* @see sj.lang.ListExpr
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*/
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public void ScanValue (ListExpr value) {
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err = false;
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GP1.reset();
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points = new Vector(value.listLength()+2);
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while(!value.isEmpty()){
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ListExpr apoint = value.first();
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if(apoint.listLength()!=2){
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err = true;
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reset();
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return;
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}
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Double X = LEUtils.readNumeric(apoint.first());
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Double Y = LEUtils.readNumeric(apoint.second());
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if(X==null || Y == null){
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reset();
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err = true;
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return;
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}
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double x = X.doubleValue();
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double y = Y.doubleValue();
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add(x,y);
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if(err){
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Reporter.debug("error in project point t("+x+" , " +y+")");
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reset();
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return;
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}
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value = value.rest();
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}
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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(pointsequence))"));
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bounds =null;
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return;
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}
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else
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if(isEmpty()){
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bounds = null;
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qr.addEntry(AttrName + " : empty");
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return;
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}
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qr.addEntry(this);
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bounds = new Rectangle2D.Double();
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if(points.size()>1)
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bounds.setRect(GP1.getBounds2D());
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else{
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Point2D.Double point = ((Dsplpoint)points.get(0)).getPoint();
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bounds.setRect(point.getX(),point.getY(),0,0);
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}
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}
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/**
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* @return The boundingbox of this object
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*/
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public Rectangle2D.Double getBounds () {
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return bounds;
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}
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/**
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* Tests if a given position is near (10pxs) of this sequence.
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* @param xpos The x-Position to test.
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* @param ypos The y-Position to test.
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* @param scalex The actual x-zoomfactor
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* @param scaley The actual y-zoomfactor
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* @return true if x-, ypos is contained in this points type
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*/
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public boolean contains (double xpos, double ypos, double scalex, double scaley) {
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if (bounds==null) return false; // an empty sequnece
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if ((bounds.getWidth()*bounds.getHeight()!=0) &&
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(!bounds.intersects(xpos - 5.0*scalex, ypos - 5.0*scaley, 10.0*scalex, 10.0*scaley)))
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return false;
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Rectangle2D.Double r = new Rectangle2D.Double(xpos - 5.0*scalex, ypos - 5.0*scaley, 10.0*scalex, 10.0*scaley);
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if(mode==AREA_MODE)
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return GP1.intersects(r);
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if(mode==LINE_MODE)
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return stroke.createStrokedShape(GP1).intersects(r);
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// POINT_MODE
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if(points==null)
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return false;
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int len = points.size();
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for(int i=0;i<len;i++){
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Point2D.Double p = ((Dsplpoint) points.get(i)).getPoint();
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if(r.contains(p))
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return true;
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}
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return false;
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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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if(isEmpty())
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return null;
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if(mode==POINTS_MODE){
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GeneralPath rpoints = new GeneralPath();
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for(int i=0;i<points.size();i++){
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rpoints.append( ((Dsplpoint)points.get(i)).getRenderObject(0,at),false);
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}
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return rpoints;
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}
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if(points.size()==1){ // only one point
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Rectangle2D.Double r = getBounds();
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double ps = Cat.getPointSize(renderAttribute,CurrentState.ActualTime);
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double pixy = Math.abs(ps/at.getScaleY());
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double pix = Math.abs(ps/at.getScaleX());
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if (Cat.getPointasRect())
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shp = new Rectangle2D.Double(r.getX()- pix/2, r.getY() - pixy/2, pix, pixy);
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else {
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shp = new Ellipse2D.Double(r.getX()- pix/2, r.getY() - pixy/2, pix, pixy);
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}
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} else{
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shp = GP1;
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}
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return shp;
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}
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}
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