141 lines
3.0 KiB
Java
141 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.viewer3d.graphic2d;
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import gui.idmanager.*;
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/*******************************
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*
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* Autor : Thomas Behr
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* Version : 1.1
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* Datum : 16.5.2000
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*
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*********************************/
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import java.util.* ;
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/** this class provides a vector to store Figure2D-Objects */
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class Figure2DVector {
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/** the intern store */
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private Vector V = new Vector();
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/** add a new Figure2D */
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public void append (Figure2D P) {
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if(P!=null){
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V.add(P);
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}
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}
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/** returns the element at the specified position **/
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public Figure2D get(int index){
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return (Figure2D) V.get(index);
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}
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/** sorts this vector by the value of the getSort() function **/
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public void sort(){
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// sort using heapsort
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int n = V.size();
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for(int i=n/2;i>0;i--)
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reheap(i,n);
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for(int i=n;i>1;i--){
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Object tmp = V.get(0);
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V.set(0,V.get(i-1));
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V.set(i-1,tmp);
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reheap(1,i-1);
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}
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}
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/** function supporting the sort() function **/
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private void reheap(int i, int k){
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int j,son;
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j=i;
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boolean done = false;
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while(2*j<=k && !done){
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if(2*j+1<=k){
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if(get(2*j-1).getSort()>get(2*j).getSort()){
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son = 2*j;
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} else {
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son = 2*j+1;
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}
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} else {
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son = 2*j;
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}
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if(get(j-1).getSort()<get(son-1).getSort()){
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// swap elements
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Object tmp = V.get(j-1);
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V.set(j-1, V.get(son-1));
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V.set(son-1, tmp);
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j = son;
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} else {
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done=true;
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}
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}
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}
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/** returns the number of containing figures */
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public int getSize() {
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return V.size();
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}
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/** get the figure on position i */
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public Figure2D getFigure2DAt(int i) throws NoSuchElementException {
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return (Figure2D) V.get(i);
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}
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/** deletes all containing figures */
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public void empty() {
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V.clear();
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}
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/** check for emptyness */
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public boolean isEmpty() {
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return V.size()==0;
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}
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/** deletes all figures with given ID */
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public void deleteFiguresWithID(ID PID) {
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// removes all Figures whith PID
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Vector nV = new Vector(V.size());
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int max = V.size();
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for(int i=0;i<max;i++){
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Figure2D fig = get(i);
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if(! fig.getID().equals(PID)){
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nV.add(fig);
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}
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}
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V = nV;
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}
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} // class
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