Examples of org.eclipse.jface.util.PropertyChangeEvent

org.eclipse.jface.util.PropertyChangeEvent
An event object describing a change to a named property.
This concrete class was designed to be instantiated, but may also be subclassed if required.

The JFace frameworks contain classes that report property change events for internal state changes that may be of interest to external parties. A special listener interface (IPropertyChangeListener) is defined for this purpose, and a typical class allow listeners to be registered via an addPropertyChangeListener method.
@see IPropertyChangeListener

   * changed
   */
  protected void fireActionHandlersChanged() {
    if (actionHandlersChanged) {
      // Doesn't actually pass the old and new values
      firePropertyChange(new PropertyChangeEvent(this, P_ACTION_HANDLERS,
          null, null));
      actionHandlersChanged = false;
    }
  }

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    // being added/removed during the notification
    final Object[] list = getListeners();
    if (list.length == 0) {
      return;
    }
    final PropertyChangeEvent event = new PropertyChangeEvent(this, name,
        oldValue, newValue);
    for (int i = 0; i < list.length; i++) {
      final IPropertyChangeListener listener = (IPropertyChangeListener) list[i];
      SafeRunner.run(new SafeRunnable(JFaceResources
          .getString("PreferenceStore.changeError")) { //$NON-NLS-1$

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    }


    public void firePropertyChangeEvent( String name, Object oldValue, Object newValue ) {
        // Do we need to fire an event.
        if ((oldValue == null || !oldValue.equals(newValue))) {
            final PropertyChangeEvent pe = new PropertyChangeEvent(this, name,
                    oldValue, newValue);
            for( final IPropertyChangeListener l : listeners ) {
                SafeRunnable.run(new SafeRunnable(JFaceResources.getString("PreferenceStore.changeError")) { //$NON-NLS-1$
                        public void run() {
                            l.propertyChange(pe);

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      Object newValue) {
    if (eventId.equals(PROP_UPDATE_EMF)) {
      getProjectElementAdapter().setBackingObject(this); // trigger EMF
                                // to update
    }
    PropertyChangeEvent event = new PropertyChangeEvent(this, eventId,
        oldValue, newValue);
    for (IPropertyChangeListener listener : listeners) {
      listener.propertyChange(event);
    }
  }

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    public void setDirty( boolean dirty ) {
        boolean oldDirty = this.dirty;
        this.dirty = dirty;
        // trigger re-render
        if (dirty && getBox() != null) {
            getBox().notifyPropertyChange(new PropertyChangeEvent(this, "dirty", oldDirty, dirty)); //$NON-NLS-1$
        }
    }

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     */
    protected void fireValueChanged( String property, Object oldValue, Object newValue ) {
        if (propertyChangeListener == null) {
            return;
        }
        PropertyChangeEvent event = new PropertyChangeEvent(this, property, oldValue, newValue);
        propertyChangeListener.propertyChange(event);
    }

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   */
  protected final void firePropertyChangeEvent(
      final KeySequence oldKeySequence) {
    if (listeners != null) {
      final Iterator listenerItr = listeners.iterator();
      final PropertyChangeEvent event = new PropertyChangeEvent(this,
          P_KEY_SEQUENCE, oldKeySequence, getKeySequence());
      while (listenerItr.hasNext()) {
        final IPropertyChangeListener listener = (IPropertyChangeListener) listenerItr
            .next();
        listener.propertyChange(event);

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  /*
   * @see org.eclipse.jface.preference.IPreferenceStore#firePropertyChangeEvent(java.lang.String, java.lang.Object, java.lang.Object)
   */
  public void firePropertyChangeEvent(String name, Object oldValue, Object newValue) {
    firePropertyChangeEvent(new PropertyChangeEvent(this, name, oldValue, newValue));
  }

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        // Propogate the property change to the appropriate listener.
        checkBox.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                Object oldValue = checkBox.getSelection() ? Boolean.FALSE.toString() : Boolean.TRUE.toString();
                Object newValue = checkBox.getSelection() ? Boolean.TRUE.toString() : Boolean.FALSE.toString();
                PropertyChangeEvent propertyChange = new PropertyChangeEvent(
                        checkBox, controlDetails.attribute, oldValue, newValue);
                controlDetails.attributesComposite.
                        propertyChange(propertyChange);
            }
        });

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        // Listen to unit changes.
        control.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent event) {
                Object oldValue = null;
                Object newValue = control.getUnit();
                PropertyChangeEvent propertyChange = new PropertyChangeEvent(
                        control, supplementary, oldValue, newValue);
                controlDetails.attributesComposite.propertyChange(propertyChange);
            }
        });


        // Listen to value changes.
        control.addModifyListener(new ModifyListener() {
            public void modifyText(ModifyEvent e) {
                Object oldValue = null;
                Object newValue = control.getNumber();
                PropertyChangeEvent propertyChange = new PropertyChangeEvent(
                        control, controlDetails.attribute, oldValue, newValue);
                controlDetails.attributesComposite.
                        propertyChange(propertyChange);
            }
        });

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