package com.macfaq;

import java.beans.*;
import java.awt.*;
import java.awt.event.*;


public class URLWatcherCustomizer extends Panel 
 implements Customizer {

  // customizer support

  URLWatcher bean;
  PropertyChangeSupport pce = new PropertyChangeSupport(this);

  public void addPropertyChangeListener(PropertyChangeListener pcl) {
    pce.addPropertyChangeListener(pcl);
  }

  public void removePropertyChangeListener(PropertyChangeListener pcl) {
    pce.removePropertyChangeListener(pcl);
  }
  
  public void setObject(Object bean) {
    this.bean = (URLWatcher) bean;
    if (this.bean.getRefreshInterval() > 0) reload.setState(true); 
    interval.setText(String.valueOf(this.bean.getRefreshInterval()));
  }
  
  public URLWatcherCustomizer() {
    init();
  }


  // user interface
  Checkbox reload = new Checkbox("Reload URL Automatically", false);
  TextField interval = new TextField(10);  
  
  public void init() {
  
    reload.addItemListener(new Enabler());
    interval.setEnabled(reload.getState());
    interval.addTextListener(new TextWatcher());
    setLayout(new GridLayout(2, 1));
    add(reload);
    Panel p1 = new Panel();
    p1.setLayout(new FlowLayout(FlowLayout.LEFT));
    p1.add(new Label("Minutes between reloads: "));
    p1.add(interval);
    add(p1);
  }
  
  class Enabler implements ItemListener {
  
    public void itemStateChanged(ItemEvent ie) {
      if (ie.getStateChange() == ItemEvent.SELECTED) {
        interval.setEnabled(true);
        Integer oldValue = new Integer (bean.getRefreshInterval());
        Integer newValue;
        try {
          newValue = Integer.decode(interval.getText());
          bean.setRefreshInterval(newValue.intValue());
          pce.firePropertyChange("Text", oldValue , newValue);
        }
        catch (NumberFormatException e) {
          // it was 0 and it's still 0, no change is necessary
        }    
      }
      else if (ie.getStateChange() == ItemEvent.DESELECTED) {
        interval.setEnabled(false);
        Integer oldValue = new Integer (bean.getRefreshInterval());
        Integer newValue = new Integer(0);
        bean.setRefreshInterval(0);
        pce.firePropertyChange("Text", oldValue , newValue);
      }
    }
  
  }
  
  class TextWatcher implements TextListener {

    public void textValueChanged(TextEvent te) {
    
      Integer oldValue = new Integer(bean.getRefreshInterval());
      Integer newValue;
      try {
        newValue = Integer.decode(interval.getText());
      }
      catch (NumberFormatException e) {
        newValue = new Integer(0);
      }    
      bean.setRefreshInterval(newValue.intValue());
      pce.firePropertyChange("Text", oldValue , newValue);
    }

  }
  
  public static void main(String[] args) {
    Frame f = new Frame("URLWatcherCustomizer");
    URLWatcherCustomizer u1 = new URLWatcherCustomizer();
    u1.init();
    f.add("Center", u1);
    f.setSize(200, 200);
    f.setLocation(50, 50);
    f.setVisible(true);
  }

}