package org.merlin.step.nov;import java.awt.*;import java.awt.event.*;import java.util.*;class RectElement implements Element {  Rectangle bounds;  Color color;    RectElement (int x, int y, int w, int h, Color c) {    bounds = new Rectangle (x, y, w, h);    color = c;  }  public Rectangle getBounds () {    return bounds;  }  public Element getTranslated (int dX, int dY) {    return new RectElement (bounds.x + dX, bounds.y + dY, bounds.width, bounds.height, color);  }  public void paint (Graphics g) {    g.setColor (color);    if ((bounds.width == 1) && (bounds.height == 1))      g.drawLine (bounds.x, bounds.y, bounds.x, bounds.y);    else      g.drawRect (bounds.x, bounds.y, bounds.width - 1, bounds.height - 1);  }}public class Rect extends Component implements Tool, ItemListener {  static Hashtable colorList = new Hashtable ();  static {    colorList.put ("white", Color.white);    colorList.put ("light grey", Color.lightGray);    colorList.put ("grey", Color.gray);    colorList.put ("dark grey", Color.darkGray);    colorList.put ("black", Color.black);    colorList.put ("red", Color.red);    colorList.put ("pink", Color.pink);    colorList.put ("orange", Color.orange);    colorList.put ("yellow", Color.yellow);    colorList.put ("green", Color.green);    colorList.put ("magenta", Color.magenta);    colorList.put ("cyan", Color.cyan);    colorList.put ("blue", Color.blue);  }    public Rect () {    enableEvents (AWTEvent.MOUSE_EVENT_MASK | AWTEvent.MOUSE_MOTION_EVENT_MASK);  }  ObservableList contents;    public void setDisplayList (ObservableList l) {    contents = l;  }    public Component getDisplay () {    return this;  }    public Component getControls () {    LWContainer controls = new LWContainer ();    controls.setLayout (new BorderLayout ());    controls.add ("North", new Label ("Rectangle Tool", Label.CENTER));    Choice colorChoice = new Choice ();    Enumeration e = colorList.keys ();    while (e.hasMoreElements ())      colorChoice.addItem ((String) e.nextElement ());    colorChoice.select ("black");    controls.add ("Center", colorChoice);    colorChoice.addItemListener (this);    return controls;  }  public void dispose () {  }  public void itemStateChanged (ItemEvent e) {    color = (Color) colorList.get (e.getItem ());  }    boolean active;  Color color = Color.black;  int x0, y0, x1, y1;      protected void processEvent (AWTEvent e) {    super.processEvent (e);    if (e instanceof MouseEvent) {      MouseEvent m = (MouseEvent) e;      switch (m.getID ()) {        case MouseEvent.MOUSE_PRESSED:          x0 = m.getX ();          y0 = m.getY ();          break;        case MouseEvent.MOUSE_RELEASED:          if (active) {            x1 = m.getX ();            y1 = m.getY ();            active = false;            contents.addElement (new RectElement (Math.min (x0, x1),                                                  Math.min (y0, y1),                                                  1 + Math.abs (x0 - x1),                                                  1 + Math.abs (y0 - y1),                                                  color));          }          break;        case MouseEvent.MOUSE_DRAGGED:          int x2 = active ? x1 : x0, y2 = active ? y1 : y0;          x1 = m.getX ();          y1 = m.getY ();          active = true;          int xm = Math.min (Math.min (x0, x1), x2),            xM = Math.max (Math.max (x0, x1), x2),            ym = Math.min (Math.min (y0, y1), y2),            yM = Math.max (Math.max (y0, y1), y2);          repaint (xm, ym, 1 + xM - xm, 1 + yM - ym);          break;      }    }  }      public void paint (Graphics g) {    if (active) {      g.setColor (color);      g.drawRect (Math.min (x0, x1), Math.min (y0, y1),                  Math.abs (x0 - x1), Math.abs (y0 - y1));    }  }}