/* * @(#)DrawTest.java	1.15 06/02/22 *  * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. *  * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: *  * -Redistribution of source code must retain the above copyright notice, this *  list of conditions and the following disclaimer. *  * -Redistribution in binary form must reproduce the above copyright notice,  *  this list of conditions and the following disclaimer in the documentation *  and/or other materials provided with the distribution. *  * Neither the name of Sun Microsystems, Inc. or the names of contributors may  * be used to endorse or promote products derived from this software without  * specific prior written permission. *  * This software is provided "AS IS," without a warranty of any kind. ALL  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST  * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,  * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY  * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,  * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. *  * You acknowledge that this software is not designed, licensed or intended * for use in the design, construction, operation or maintenance of any * nuclear facility. *//* * @(#)DrawTest.java	1.15 06/02/22 */import java.awt.event.*;import java.awt.*;import java.applet.*;import java.util.Vector;public class DrawTest extends Applet{    DrawPanel panel;    DrawControls controls;    public void init() {	setLayout(new BorderLayout());	panel = new DrawPanel();        controls = new DrawControls(panel);	add("Center", panel);	add("South",controls);    }    public void destroy() {        remove(panel);        remove(controls);    }    public static void main(String args[]) {	Frame f = new Frame("DrawTest");	DrawTest drawTest = new DrawTest();	drawTest.init();	drawTest.start();	f.add("Center", drawTest);	f.setSize(300, 300);	f.show();    }    public String getAppletInfo() {        return "A simple drawing program.";    }}class DrawPanel extends Panel implements MouseListener, MouseMotionListener {    public static final int LINES = 0;    public static final int POINTS = 1;    int	   mode = LINES;    Vector lines = new Vector();    Vector colors = new Vector();    int x1,y1;    int x2,y2;    public DrawPanel() {	setBackground(Color.white);	addMouseMotionListener(this);	addMouseListener(this);    }    public void setDrawMode(int mode) {	switch (mode) {	  case LINES:	  case POINTS:	    this.mode = mode;	    break;	  default:	    throw new IllegalArgumentException();	}    }    public void mouseDragged(MouseEvent e) {        e.consume();        switch (mode) {            case LINES:                x2 = e.getX();                y2 = e.getY();                break;            case POINTS:            default:                colors.addElement(getForeground());                lines.addElement(new Rectangle(x1, y1, e.getX(), e.getY()));                x1 = e.getX();                y1 = e.getY();                break;        }        repaint();    }    public void mouseMoved(MouseEvent e) {    }    public void mousePressed(MouseEvent e) {        e.consume();        switch (mode) {            case LINES:                x1 = e.getX();                y1 = e.getY();                x2 = -1;                break;            case POINTS:            default:                colors.addElement(getForeground());                lines.addElement(new Rectangle(e.getX(), e.getY(), -1, -1));                x1 = e.getX();                y1 = e.getY();                repaint();                break;        }    }    public void mouseReleased(MouseEvent e) {        e.consume();        switch (mode) {            case LINES:                colors.addElement(getForeground());                lines.addElement(new Rectangle(x1, y1, e.getX(), e.getY()));                x2 = -1;                break;            case POINTS:            default:                break;        }        repaint();    }    public void mouseEntered(MouseEvent e) {    }    public void mouseExited(MouseEvent e) {    }    public void mouseClicked(MouseEvent e) {    }    public void paint(Graphics g) {	int np = lines.size();	/* draw the current lines */	g.setColor(getForeground());	for (int i=0; i < np; i++) {	    Rectangle p = (Rectangle)lines.elementAt(i);	    g.setColor((Color)colors.elementAt(i));	    if (p.width != -1) {		g.drawLine(p.x, p.y, p.width, p.height);	    } else {		g.drawLine(p.x, p.y, p.x, p.y);	    }	}	if (mode == LINES) {	    g.setColor(getForeground());	    if (x2 != -1) {                g.drawLine(x1, y1, x2, y2);	    }	}    }}class DrawControls extends Panel implements ItemListener {    DrawPanel target;    public DrawControls(DrawPanel target) {	this.target = target;	setLayout(new FlowLayout());	setBackground(Color.lightGray);	target.setForeground(Color.red);	CheckboxGroup group = new CheckboxGroup();	Checkbox b;	add(b = new Checkbox(null, group, false));	b.addItemListener(this);	b.setForeground(Color.red);	add(b = new Checkbox(null, group, false));	b.addItemListener(this);	b.setForeground(Color.green);	add(b = new Checkbox(null, group, false));	b.addItemListener(this);	b.setForeground(Color.blue);	add(b = new Checkbox(null, group, false));	b.addItemListener(this);	b.setForeground(Color.pink);	add(b = new Checkbox(null, group, false));	b.addItemListener(this);	b.setForeground(Color.orange);	add(b = new Checkbox(null, group, true));	b.addItemListener(this);	b.setForeground(Color.black);	target.setForeground(b.getForeground());	Choice shapes = new Choice();	shapes.addItemListener(this);	shapes.addItem("Lines");	shapes.addItem("Points");	shapes.setBackground(Color.lightGray);	add(shapes);    }    public void paint(Graphics g) {	Rectangle r = getBounds();	g.setColor(Color.lightGray);	g.draw3DRect(0, 0, r.width, r.height, false);        int n = getComponentCount();        for(int i=0; i<n; i++) {            Component comp = getComponent(i);            if (comp instanceof Checkbox) {                Point loc = comp.getLocation();                Dimension d = comp.getSize();                g.setColor(comp.getForeground());                g.drawRect(loc.x-1, loc.y-1, d.width+1, d.height+1);            }        }    }  public void itemStateChanged(ItemEvent e) {    if (e.getSource() instanceof Checkbox) {      target.setForeground(((Component)e.getSource()).getForeground());    } else if (e.getSource() instanceof Choice) {      String choice = (String) e.getItem();      if (choice.equals("Lines")) {	target.setDrawMode(DrawPanel.LINES);      } else if (choice.equals("Points")) {	target.setDrawMode(DrawPanel.POINTS);      }    }  }}