Examples of java.beans.PropertyChangeEvent

java.beans.PropertyChangeEvent
A "PropertyChange" event gets delivered whenever a bean changes a "bound" or "constrained" property. A PropertyChangeEvent object is sent as an argument to the PropertyChangeListener and VetoableChangeListener methods.
Normally PropertyChangeEvents are accompanied by the name and the old and new value of the changed property. If the new value is a primitive type (such as int or boolean) it must be wrapped as the corresponding java.lang.* Object type (such as Integer or Boolean).
Null values may be provided for the old and the new values if their true values are not known.
An event source may send a null object as the name to indicate that an arbitrary set of if its properties have changed. In this case the old and new values should also be null.

                    }
                    setDevicePath(null);
                    setDeviceFile(null);
                } catch (NoSuchMethodException e) {
                    throw new PropertyVetoExceptionThatNetBeansLikes(frameGrabber.getSimpleName() + " does not accept a deviceNumber.",
                            new PropertyChangeEvent(this, "deviceNumber", this.deviceNumber, this.deviceNumber = null));
                }
            }
            String oldDescription = getDescription();
            firePropertyChange("deviceNumber", this.deviceNumber, this.deviceNumber = deviceNumber);
            firePropertyChange("description", oldDescription, getDescription());

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                    setDeviceNumber(null);
                    setDevicePath(null);
                } catch (NoSuchMethodException e) {
                    deviceFile = null;
                    throw new PropertyVetoExceptionThatNetBeansLikes(frameGrabber.getSimpleName() + " does not accept a deviceFile.",
                            new PropertyChangeEvent(this, "deviceFile", this.deviceFile, this.deviceFile = null));
                }
            }
            String oldDescription = getDescription();
            firePropertyChange("deviceFile", this.deviceFile, this.deviceFile = deviceFile);
            firePropertyChange("description", oldDescription, getDescription());

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                    setDeviceNumber(null);
                    setDeviceFile(null);
                } catch (NoSuchMethodException e) {
                    devicePath = "";
                    throw new PropertyVetoExceptionThatNetBeansLikes(frameGrabber.getSimpleName() + " does not accept a devicePath.",
                            new PropertyChangeEvent(this, "devicePath", this.devicePath, this.devicePath = null));
                }
            }
            String oldDescription = getDescription();
            firePropertyChange("devicePath", this.devicePath, this.devicePath = devicePath);
            firePropertyChange("description", oldDescription, getDescription());

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    }


    protected void firePropertyChange(String propertyName,
            double oldValue,
            double newValue) {
        PropertyChangeEvent changeEvent = new PropertyChangeEvent(this,
                propertyName,
                oldValue,
                newValue);
        for (PropertyChangeListener listener : listeners) {
            listener.propertyChange(changeEvent);

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   */
  public Dictionary invoke(Dictionary args) throws Exception {
    Long newValue = (Long) args.get(NEW_TIME_VALUE);
        Long oldValue = (Long) ((TimeStateVariable) time).getCurrentValue();
    ((TimeStateVariable) time).setCurrentTime(newValue.longValue());
        ClockDevice.notifier.propertyChange(new PropertyChangeEvent(time,"Time",oldValue,newValue));        
    args.remove(NEW_TIME_VALUE);
    args.put(NEW_RESULT_VALUE,((TimeStateVariable) time).getCurrentTime());
    return args;
  }

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  public void update() {
    Clock clock = Clock.getInstance();
    Calendar cal = clock.getCalendar();
        Date date = cal.getTime();
        UPnPStateVariable variable =  timerService.getStateVariable("Time");
    notifier.propertyChange(new PropertyChangeEvent(variable,"Time",null,date));
  }

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    m_listenerList.remove(PropertyChangeListener.class, l);
  }


  public void firePropertyChangedEvent(String name, Object oldValue, Object newValue) {
    //System.out.println("[Gui Activator] fire PCE("+name+","+oldValue+","+newValue+")");
    PropertyChangeEvent event = null;
    // Guaranteed to return a non-null array
    Object[] listeners = m_listenerList.getListenerList();


    // Process the listeners last to first, notifying
    // those that are interested in this event 
    for (int i = listeners.length - 2; i >= 0; i -= 2) {
      if (listeners[i] == PropertyChangeListener.class) {
        // Lazily create the event:
        if (event == null) {
          event = new PropertyChangeEvent(this, name, oldValue, newValue);
        }
        ((PropertyChangeListener) listeners[i + 1]).propertyChange(event);
      }
    }
  }

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      currFile.delete();
      fileChooser.rescanCurrentDirectory();
      fileChooser.setSelectedFile(null);
      fileChooser.rescanCurrentDirectory();
      File selFile = fileChooser.getSelectedFile();
      propertyChange(new PropertyChangeEvent(this, JFileChooser.SELECTED_FILE_CHANGED_PROPERTY, currFile, selFile));
    }
  }

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      currFile.delete();
      fileChooser.rescanCurrentDirectory();
      fileChooser.setSelectedFile(null);
      fileChooser.rescanCurrentDirectory();
      File selFile = fileChooser.getSelectedFile();
      propertyChange(new PropertyChangeEvent(this, JFileChooser.SELECTED_FILE_CHANGED_PROPERTY, currFile, selFile));
    }
  }

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      currFile.delete();
      fileChooser.rescanCurrentDirectory();
      fileChooser.setSelectedFile(null);
      fileChooser.rescanCurrentDirectory();
      File selFile = fileChooser.getSelectedFile();
      propertyChange(new PropertyChangeEvent(this, JFileChooser.SELECTED_FILE_CHANGED_PROPERTY, currFile, selFile));
    }
  }

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