bound properties listeners sources javabeans

Hi all

I am working on an assignment for college, trying to learn Java etc,

Basically I need one object to react to events in another

Code is as follows

// Extra Panel

package myPackage1;

import java.awt.GridLayout;

import java.beans.PropertyChangeEvent;

import javax.swing.JPanel;

public class ExtraPanel extends JPanel implements

java.beans.PropertyChangeListener,

java.io.Serializable

{

private static final long serialVersionUID = 1L;

public JPanel thisPanel;

public JPanel ExtraPanelMethod()

{

thisPanel = new JPanel();

GridLayout grid = new GridLayout();

grid.setColumns(1);

grid.setHgap(10);

grid.setRows(6);

grid.setVgap(5);

thisPanel.setLayout(grid);

return thisPanel;

}

public void propertyChange(PropertyChangeEvent evt)

{

}

}

// The Slider Class

package myPackage1;

import java.awt.Color;

import java.awt.Component;

import java.awt.Font;

import java.awt.GridLayout;

import javax.swing.BorderFactory;

import javax.swing.JFormattedTextField;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JSlider;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

import javax.swing.text.NumberFormatter;

public class TheSliderClass extends JPanel implements ChangeListener

{

private static final long serialVersionUID = 1L;

//Add a formatted text field to supplement the slider.

public JFormattedTextField textField,textField2;

JFormattedTextField newValue = null;

JFormattedTextField oldValue = null;

public String publicSliderName = "";

public int fps;

//And here's the slider.

public JSlider sliderParameterValue;

JPanel labelAndTextField,allTogether;

int TractiveEffort = 0;

public JPanel TheSliderClassMethod(String sliderName, int minimumValue, int maximumValue)

{

JPanel allTogether = new JPanel();

Font font = new Font("palatino linotype regular", Font.BOLD, 12);

int initialValue = ((minimumValue+maximumValue)/2);

int tickMarkValue = (maximumValue-minimumValue);

publicSliderName = sliderName;

//Create the label.

JLabel sliderLabel = new JLabel(sliderName,JLabel.CENTER);

sliderLabel.setAlignmentX(Component.CENTER_ALIGNMENT);

sliderLabel.setFont(font);

sliderLabel.setForeground(Color.BLUE);

//Create the formatted text field and its formatter.

java.text.NumberFormat numberFormat =

java.text.NumberFormat.getIntegerInstance();

NumberFormatter formatter = new NumberFormatter(numberFormat);

formatter.setMinimum(new Integer(minimumValue));

formatter.setMaximum(new Integer(maximumValue));

textField = new JFormattedTextField(formatter);

textField.setValue(new Integer(initialValue));

textField.setColumns(3); //get some space

textField.setEditable(false);

textField.setForeground(Color.red);

textField2 = new JFormattedTextField(formatter);

textField2.setValue(new Integer(initialValue));

textField2.setColumns(3); //get some space

textField2.setEditable(false);

textField2.setForeground(Color.red);

//Create the slider.

sliderParameterValue = new JSlider(JSlider.HORIZONTAL,

minimumValue, maximumValue, initialValue);

sliderParameterValue.addChangeListener(this);

//Turn on labels at major tick marks.

sliderParameterValue.setMajorTickSpacing(tickMarkValue);

sliderParameterValue.setMinorTickSpacing(10);

sliderParameterValue.setPaintTicks(true);

sliderParameterValue.setPaintLabels(true);

sliderParameterValue.setBorder(

BorderFactory.createEmptyBorder(0,0,0,0));

sliderParameterValue.setBackground(Color.cyan);

//Create a subpanel for the label and text field.

JPanel labelAndTextField = new JPanel(); //use FlowLayout

labelAndTextField.setBackground(Color.cyan);

labelAndTextField.add(sliderLabel);

labelAndTextField.add(textField);

//Put everything together.

GridLayout gridThis = new GridLayout();

gridThis.setColumns(1);

gridThis.setRows(2);

allTogether.setLayout(gridThis);

allTogether.add(labelAndTextField);

allTogether.add(sliderParameterValue);

allTogether.setBorder(BorderFactory.createBevelBorder(1,Color.red,

Color.red));

return allTogether;

}

/** Listen to the slider. */

public void stateChanged(ChangeEvent e)

{

JSlider source = (JSlider)e.getSource();

fps = (int)source.getValue();

textField.setText(String.valueOf(fps));

textField2.setText(String.valueOf(fps));

}

}

How do I get Extra Panel to React to the slider in the Slider Class being moved?

Thanks all

[4987 byte] By [N_Gen_Steam_Deva] at [2007-10-3 7:29:41]