Deselection of a button

Question

hi
in the following code,
we can click on a button and draw that geometric shape.
the problem is that i wnt that shape to b drawn only once for every click.
ie- the button should b deselected after the selected figure is drawn once..
plz suggest changes in the code.
plz help....
CODE is as follows:
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.Math;
import java.util.Vector;
<APPLET
CODE = Draw.class
WIDTH = 350
HEIGHT = 280 >
</APPLET>
public class Draw extends Applet {
Button lineButton = new Button("Line");
Button ovalButton = new Button("Oval");
Button rectButton = new Button("Rectangle");
Button clearButton = new Button("Clear");
MyCanvas canvas = new MyCanvas(TwoPointObject.LINE);
int screenWidth = 400;
int screenHeight = 400;
public void init() {
setBackground(Color.white);
setLayout(new BorderLayout());
add("Center",canvas);
setupButtons();
resize(screenWidth,screenHeight);
void setupButtons() {
lineButton.addActionListener(new ButtonHandler());
ovalButton.addActionListener(new ButtonHandler());
rectButton.addActionListener(new ButtonHandler());
clearButton.addActionListener(new ButtonHandler());
Panel panel = new Panel();
panel.add(lineButton);
panel.add(ovalButton);
panel.add(rectButton);
panel.add(clearButton);
add("North",panel);
class ButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent ev){
String s=ev.getActionCommand();
if(s.equals("Clear")) canvas.clear();
else if(s.equals("Line"))
canvas.setTool(TwoPointObject.LINE);
else if(s.equals("Oval"))
canvas.setTool(TwoPointObject.OVAL);
else if(s.equals("Rectangle"))
canvas.setTool(TwoPointObject.RECTANGLE);
class MyCanvas extends Canvas {
int tool = TwoPointObject.LINE;
Vector objects = new Vector();
TwoPointObject current;
boolean newObject = false;
public MyCanvas(int toolType) {
super();
tool = toolType;
addMouseListener(new MouseHandler());
addMouseMotionListener(new MouseMotionHandler());
public void setTool(int toolType) {
tool = toolType;
public void clear() {
objects.removeAllElements();
repaint();
public void paint(Graphics g) {
int numObjects = objects.size();
for(int i=0;i<numObjects;++i) {
TwoPointObject obj = (TwoPointObject) objects.elementAt(i);
obj.draw(g);
if(newObject) current.draw(g);
class MouseHandler extends MouseAdapter {
public void mousePressed(MouseEvent e){
current = new TwoPointObject(tool,e.getX(),e.getY());
newObject = true;
public void mouseReleased(MouseEvent e){
if(newObject) {
objects.addElement(current);
newObject = false;
class MouseMotionHandler extends MouseMotionAdapter {
public void mouseDragged(MouseEvent e){
int x = e.getX();
int y = e.getY();
if(newObject) {
int oldX = current.endX;
int oldY = current.endY;
if(tool != TwoPointObject.LINE) {
if(x > current.startX) current.endX = x;
if(y > current.startY) current.endY = y;
int width = Math.max(oldX,current.endX) - current.startX + 1;
int height = Math.max(oldY,current.endY) - current.startY + 1;
repaint(current.startX,current.startY,width,height);
}else{
current.endX = x;
current.endY = y;
int startX = Math.min(Math.min(current.startX,current.endX),oldX);
int startY = Math.min(Math.min(current.startY,current.endY),oldY);
int endX = Math.max(Math.max(current.startX,current.endX),oldX);
int endY = Math.max(Math.max(current.startY,current.endY),oldY);
repaint(startX,startY,endX-startX+1,endY-startY+1);
class TwoPointObject {
public static int LINE = 0;
public static int OVAL = 1;
public static int RECTANGLE = 2;
public int type, startX, startY, endX, endY;
public TwoPointObject(int objectType,int x1,int y1,int x2,int y2) {
type = objectType;
startX = x1;
startY = y1;
endX = x2;
endY = y2;
public TwoPointObject(int objectType,int x,int y) {
this(objectType,x,y,x,y);
public TwoPointObject() {
this(LINE,0,0,0,0);
public void draw(Graphics g) {
if(type == LINE) g.drawLine(startX,startY,endX,endY);
else{
int w = Math.abs(endX - startX);
int l = Math.abs(endY - startY);
if(type == OVAL) g.drawOval(startX,startY,w,l);
else g.drawRect(startX,startY,w,l);
}

Answer 1

can anyone HELP me, pleeeease