import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.beans.*;
import java.io.*;
/**
* A Three State Button Class
* @author Noman Naeem
* @version 1.0
*/
public class ThreeStateButtonBean extends JComponent implements Serializable{
private int state = 0;
private int x = 0;
private int y = 0;
private int height = 30;
private int width = 30;
private final int MIN_WIDTH = 10;
private final int MIN_HEIGHT = 10;
private final int RAISED_OFFSET = -1;
private transient PropertyChangeSupport pcs = new PropertyChangeSupport(this);
private boolean isDown = false;
private transient java.util.Vector actionListeners;
private boolean hasFocus = false;
public ThreeStateButtonBean()
{
this.setOpaque(true);
this.enableEvents(AWTEvent.MOUSE_EVENT_MASK);
this.enableEvents(AWTEvent.KEY_EVENT_MASK);
this.enableEvents(AWTEvent.FOCUS_EVENT_MASK);
actionListeners = new java.util.Vector();
}
public void processMouseEvent(MouseEvent me)
{
switch (me.getID()) {
case MouseEvent.MOUSE_PRESSED:
isDown = true;
this.requestFocus();
repaint();
break;
case MouseEvent.MOUSE_RELEASED:
isDown = false;
int s = (state+1)%3;
setState(s);
if (actionListeners.size() > 0) {
ActionEvent ae = new ActionEvent(this,me.getID(),"Mouse Clicked on Button");
this.fireActionEvent(ae);
}
break;
}
super.processMouseEvent(me);
}
public void processKeyEvent(KeyEvent ke)
{
switch (ke.getID()) {
case KeyEvent.KEY_PRESSED:
if (ke.getKeyChar() == ' ') {
isDown = true;
repaint();
}
break;
case KeyEvent.KEY_RELEASED:
if (ke.getKeyChar() == ' ') {
isDown = false;
int s = (state+1)%3;
setState(s);
if (actionListeners.size() > 0) {
ActionEvent ae = new ActionEvent(this,ke.getID(),"Space Pressed on Button");
this.fireActionEvent(ae);
}
}
break;
}
super.processKeyEvent(ke);
}
public void processFocusEvent(FocusEvent fe)
{
switch (fe.getID()) {
case FocusEvent.FOCUS_GAINED:
hasFocus = true;
repaint();
break;
case FocusEvent.FOCUS_LOST:
hasFocus = false;
repaint();
break;
}
}
public synchronized void addPropertyChangeListener(PropertyChangeListener pl)
{
pcs.addPropertyChangeListener(pl);
}
public synchronized void addActionListener(ActionListener al)
{
actionListeners.addElement(al);
}
public synchronized void removeActionListener(ActionListener al)
{
actionListeners.removeElement(al);
}
public synchronized void removePropertyChangeListener(PropertyChangeListener pl)
{
pcs.removePropertyChangeListener(pl);
}
public boolean isFocusTraversable()
{
return true;
}
public void fireActionEvent(ActionEvent ae)
{
java.util.Vector actionListenersClone;
synchronized (this) {
actionListenersClone = (java.util.Vector)actionListeners.clone();
}
for (int i=0;i<actionListenersClone.size();i++)
((ActionListener)actionListenersClone.elementAt(i)).actionPerformed(ae);
}
public void setState(int state)
{
PropertyChangeEvent pce = new PropertyChangeEvent(this,"state",new Integer(this.state),new Integer(state));
pcs.firePropertyChange(pce);
this.state = state;
this.repaint();
}
public int getState()
{
return state;
}
public void paint(Graphics g)
{
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
g2.setColor(getBackground());
g2.fillRect(x,y,width,height);
if (!isDown) {
if (hasFocus) {
g2.draw3DRect(x+1,y+1,width-2,height-2,true);
}
else {
javax.swing.border.Border cb = BorderFactory.createEtchedBorder();
cb.paintBorder(this,g,x,y,width,height);
}
}
else {
g2.setColor(new Color(160,160,160));
g2.fillRect(x,y,width,height);
g2.setColor(Color.white);
g2.drawRect(x,y,width-1,height-1);
g2.setColor(new Color(100,100,100));
g2.drawRect(x,y,width-2,height-2);
}
if (state == 1) {
g2.setStroke(new BasicStroke(width/MIN_WIDTH));
x = width/16;
g2.setColor(Color.black);
g2.drawLine(x+width/5+x/2,y+height/2+height/12,x+width/3,y+height-height/3);
g2.drawLine(x+width/3,y+height-height/3,x+width-width/3,y+height/3);
x = 0;
}
else if (state == 2) {
if (!hasFocus)
x = RAISED_OFFSET;
g2.setStroke(new BasicStroke(width/MIN_WIDTH));
g2.setColor(Color.black);
g2.drawLine(x+width/3,y+height/3,x+width-width/3,y+height-height/3);
g2.drawLine(x+width-width/3,y+height/3,x+width/3,y+height-height/3);
x = 0;
}
}
public int getHeight()
{
return height;
}
public void setHeight(int height)
{
if (height > MIN_HEIGHT) {
setPreferredSize(new Dimension(width,height));
}
}
public int getWidth()
{
return width;
}
public void setWidth(int width)
{
if (width > MIN_WIDTH) {
setPreferredSize(new Dimension(width,height));
}
}
public Dimension getPreferredSize()
{
return new Dimension(width, height);
}
public void setPreferredSize(Dimension d)
{
super.setPreferredSize(d);
this.height = d.height;
this.width = d.width;
revalidate();
if (this.getParent() != null)
this.getParent().repaint();
}
private void writeObject(ObjectOutputStream oos) throws IOException
{
oos.defaultWriteObject();
}
private void readObject(ObjectInputStream ois) throws ClassNotFoundException, IOException
{
ois.defaultReadObject();
actionListeners = new java.util.Vector();
pcs = new PropertyChangeSupport(this);
}
}
