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/***************************************************************************
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Title: GraphBrowser/Vertex.java
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ID: $Id$
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Author: Stefan Berghofer, TU Muenchen
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Copyright 1997 TU Muenchen
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This class contains attributes and methods common to all kinds of
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vertices (e.g. coordinates, successors, predecessors).
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***************************************************************************/
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package GraphBrowser;
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import java.util.*;
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import java.awt.*;
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import java.io.*;
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abstract class Vertex {
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protected static final Font font=new Font("Helvetica",Font.PLAIN,12);
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Vector children=new Vector(10,10);
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Vector parents=new Vector(10,10);
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int degree=0;
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int number=-1;
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double weight=0;
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int x,y;
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Graph gra;
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public abstract Object clone();
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public void setGraph(Graph g) { gra=g; }
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public int countChildren() { return children.size(); }
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/** getInflate returns a vector of vertices which get **/
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/** inflated again if the user clicks on this vertex **/
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public void setInflate(Vector v) {}
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public Vector getInflate() { return null; }
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/** getUp returns a vector of vertices which get inflated **/
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/** again, if the user clicks on this vertex's upward arrow **/
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public Vector getUp() { return null; }
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public void setUp(Vector v) {}
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/** getUp returns a vector of vertices which get inflated **/
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/** again, if the user clicks on this vertex's downward arrow **/
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public Vector getDown() { return null; }
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public void setDown(Vector v) {}
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/** internal number, for decoding / encoding etc. **/
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public int getNumber() { return number; }
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public void setNumber(int n) { number=n; }
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public String getLabel() {return "";}
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public void setLabel(String s) {}
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/** unique identifier **/
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public String getID() {return "";}
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public void setID(String s) {}
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public Dimension getLabelSize(Graphics g) {
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FontMetrics fm=g.getFontMetrics(font);
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return new Dimension(
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Math.max(fm.stringWidth("[. . . .]"),fm.stringWidth(getLabel())),
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fm.getAscent()+fm.getDescent());
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}
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public String getPath() { return "";}
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public void setPath(String p) {}
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public String getDir() { return ""; }
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public void setDir(String d) {}
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public void setWeight(double w) {weight=w;}
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public double getWeight() {return weight;}
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public void setDegree(int d) { degree=d; }
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public int getDegree() { return degree; }
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public boolean isDummy() { return false; }
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public Enumeration getChildren() {
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return ((Vector)(children.clone())).elements();
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}
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public void addChild(Vertex v) {
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children.addElement(v);
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v.parents.addElement(this);
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}
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public void removeChild(Vertex v) {
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children.removeElement(v);
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v.parents.removeElement(this);
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}
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public boolean isChild(Vertex v) {
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return children.indexOf(v)>=0;
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}
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public boolean isParent(Vertex v) {
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return parents.indexOf(v)>=0;
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}
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public Enumeration getParents() {
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return ((Vector)(parents.clone())).elements();
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}
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public void addParent(Vertex v) {
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parents.addElement(v);
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v.children.addElement(this);
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}
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public void removeParent(Vertex v) {
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parents.removeElement(v);
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v.children.removeElement(this);
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}
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/********************************************************************/
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/* get all predecessor vertices */
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/********************************************************************/
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public Vector getPreds() {
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Vector v1=new Vector(10,10);
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Vertex vx1,vx2;
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Enumeration e1,e2;
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e1=getParents();
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while (e1.hasMoreElements()) {
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vx1=(Vertex)(e1.nextElement());
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if (v1.indexOf(vx1)<0) v1.addElement(vx1);
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e2=vx1.getPreds().elements();
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while (e2.hasMoreElements()) {
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vx2=(Vertex)(e2.nextElement());
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if (v1.indexOf(vx2)<0) v1.addElement(vx2);
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}
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}
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return v1;
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}
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/********************************************************************/
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/* get all successor vertices */
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/********************************************************************/
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public Vector getSuccs() {
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Vector v1=new Vector(10,10);
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Vertex vx1,vx2;
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Enumeration e1,e2;
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e1=getChildren();
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while (e1.hasMoreElements()) {
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vx1=(Vertex)(e1.nextElement());
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if (v1.indexOf(vx1)<0) v1.addElement(vx1);
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e2=vx1.getSuccs().elements();
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while (e2.hasMoreElements()) {
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vx2=(Vertex)(e2.nextElement());
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if (v1.indexOf(vx2)<0) v1.addElement(vx2);
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}
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}
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return v1;
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}
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public void setX(int x) {this.x=x;}
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public void setY(int y) {this.y=y;}
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public int getX() {return x;}
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public int getY() {return y;}
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public abstract int leftX();
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public abstract int rightX();
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public abstract void draw(Graphics g);
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public void drawButtons(Graphics g) {}
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public void drawBox(Graphics g,Color boxColor) {}
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public void removeButtons(Graphics g) {}
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public boolean contains(int x,int y) { return false; }
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public boolean leftButton(int x,int y) { return false; }
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public boolean rightButton(int x,int y) { return false; }
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public void PS(PrintWriter p) {}
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}
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