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

    return (null);
  }


  void firePropertyChange()
  {
    mTab.propertyChange(new PropertyChangeEvent(this, " ", " ", " "));
  }

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     * @param newValue
     *            The property's new value
     */
    public void firePropertyChangeEvent(final Object source, final String name,
            final Object oldValue, final Object newValue) {
        final PropertyChangeEvent event = new PropertyChangeEvent(source, name, oldValue,
                newValue);
        final Object[] listeners = fListeners.getListeners();
        for (final Object element : listeners) {
            ((IPropertyChangeListener) element).propertyChange(event);
        }

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      Object newValue) {
    final Object[] finalListeners = getListeners();
    // Do we need to fire an event.
    if (finalListeners.length > 0
        && (oldValue == null || !oldValue.equals(newValue))) {
      final PropertyChangeEvent pe = new PropertyChangeEvent(this, name,
          oldValue, newValue);
      for (int i = 0; i < finalListeners.length; ++i) {
        final IPropertyChangeListener l = (IPropertyChangeListener) finalListeners[i];
        SafeRunnable.run(new SafeRunnable(JFaceResources
            .getString("PreferenceStore.changeError")) { //$NON-NLS-1$

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

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    if (newColor != null) {
        RGB oldValue = fColorValue;
        fColorValue = newColor;
        final Object[] finalListeners = getListeners();
        if (finalListeners.length > 0) {
            PropertyChangeEvent pEvent = new PropertyChangeEvent(
                    this, PROP_COLORCHANGE, oldValue, newColor);
            for (int i = 0; i < finalListeners.length; ++i) {
                IPropertyChangeListener listener = (IPropertyChangeListener) finalListeners[i];
                listener.propertyChange(pEvent);
            }

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    Object[] array = propertyChangeListeners.getListeners();
    for (int i = 0; i < array.length; i++) {
      final IPropertyChangeListener l = (IPropertyChangeListener) array[i];
      SafeRunnable.run(new SafeRunnable() {
        public void run() {
          l.propertyChange(new PropertyChangeEvent(this, actionId,
              null, null));
        }
      });
    }
  }

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              .getCommand(commandId);
          final ParameterizedCommand parameterizedCommand = new ParameterizedCommand(
              command, null);
          if (event.isActiveBindingsChangedFor(parameterizedCommand)) {
            Object value = entry.getValue();
            PropertyChangeEvent propertyChangeEvent = new PropertyChangeEvent(event
                .getManager(), IAction.TEXT, null, null);
            if (value instanceof ListenerList) {
              Object[] listeners= ((ListenerList) value).getListeners();
              for (int i = 0; i < listeners.length; i++) {
                final IPropertyChangeListener listener = (IPropertyChangeListener) listeners[i];

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        if (listeners.length == 0) {
      return;
    }
    
        final PropertyChangeEvent event = new PropertyChangeEvent(this,
                changeId, oldValue, newValue);
    Runnable notifier = new Runnable() {
      public void run() {
        for (int i = 0; i < listeners.length; i++) {
          final IPropertyChangeListener listener = (IPropertyChangeListener) listeners[i];

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     * @since 3.2
     */
  private void firePropertyChange(IWorkingSet newWorkingSet, IWorkingSet oldWorkingSet) {
    // Update viewer
        if (workingSetUpdater != null) {
            workingSetUpdater.propertyChange(new PropertyChangeEvent(this,
                    WorkingSetFilterActionGroup.CHANGE_WORKING_SET,
                    oldWorkingSet, newWorkingSet));
        }
  }

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    /**
   * @since 3.3
   */
    protected void firePartPropertyChanged(String key, String oldValue, String newValue) {
      final PropertyChangeEvent event = new PropertyChangeEvent(this, key, oldValue, newValue);
      Object[] l = partChangeListeners.getListeners();
      for (int i = 0; i < l.length; i++) {
      try {
        ((IPropertyChangeListener)l[i]).propertyChange(event);
      } catch (RuntimeException e) {

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