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

        // Add a modify listener on the text control.
        textDefinition.addModifyListener(new ModifyListener() {
            public void modifyText(ModifyEvent e) {
                Object oldValue = null;
                Object newValue = textDefinition.getText();
                PropertyChangeEvent propertyChange = new PropertyChangeEvent(
                        textDefinition, controlDetails.attribute, oldValue, newValue);
                controlDetails.attributesComposite.
                        propertyChange(propertyChange);
            }
        });

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        cellIterations.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent event) {
                Object oldValue = null;
                Object newValue = cellIterations.getIterationsQualifier();
                PropertyChangeEvent propertyChange = new PropertyChangeEvent(
                        cellIterations, supplementary, oldValue, newValue);
                controlDetails.attributesComposite.propertyChange(propertyChange);
            }
        });


        // Add an accessible listener
        addAccessibleListener(cellIterations, controlDetails);


        // Add a modify listener to this control (for the text value).
        cellIterations.addModifyListener(new ModifyListener() {
            public void modifyText(ModifyEvent e) {
                Object oldValue = null;
                Object newValue = cellIterations.getIterations();
                PropertyChangeEvent propertyChange = new PropertyChangeEvent(
                        cellIterations, controlDetails.attribute, oldValue, newValue);
                controlDetails.attributesComposite.
                        propertyChange(propertyChange);
            }
        });

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        combo.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent event) {
                Object oldValue = null;
                Object newValue = combo.getItem(combo.getSelectionIndex());
                PropertyChangeEvent propertyChange = new PropertyChangeEvent(
                        combo, controlDetails.attribute, oldValue, newValue);
                controlDetails.attributesComposite.propertyChange(propertyChange);
            }
        });

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        combo.addModifyListener(new ModifyListener() {
            public void modifyText(ModifyEvent e) {
                Object oldValue = null;
                Object newValue = combo.getValue();
                PropertyChangeEvent propertyChange = new PropertyChangeEvent(
                        combo, controlDetails.attribute, oldValue, newValue);
                controlDetails.attributesComposite.
                        propertyChange(propertyChange);
            }
        });

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            this.attribute = attribute;
        }


        public void handleEvent(Event e) {
            Object value = attributesComposite.getAttributeValue(attribute);
            PropertyChangeEvent event = new PropertyChangeEvent(
                    attributesComposite.getData(attribute), attribute, null,
                    value);
            attributesComposite.propertyChange(event);
        }

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   * @param newValue
   */
  private void firePropertyChange(IEvaluationReference ref, Object oldValue,
      Object newValue) {
    ref.getListener().propertyChange(
        new PropertyChangeEvent(ref, ref.getProperty(), oldValue,
            newValue));
  }

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        public void handleException(Throwable exception) {
          WorkbenchPlugin.log(exception);
        }


        public void run() throws Exception {
          listener.propertyChange(new PropertyChangeEvent(
              EvaluationAuthority.this, property, oldValue,
              newValue));
        }
      });
    }

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  }


  protected void firePropertyChange(String changeId, ITheme oldTheme,
      ITheme newTheme) {


    PropertyChangeEvent event = new PropertyChangeEvent(this, changeId,
        oldTheme, newTheme);
    firePropertyChange(event);
  }

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    private IPropertyChangeListener getPartPropertyListenerProxy() {
    if (lazyPartPropertyChangeListener == null) {
      lazyPartPropertyChangeListener = new IPropertyChangeListener() {
        public void propertyChange(PropertyChangeEvent event) {
          PropertyChangeEvent e = new PropertyChangeEvent(this,
              event.getProperty(), event.getOldValue(), event.getNewValue());
          firePartPropertyChange(e);
        }
      };
    }

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     */
    protected void fireMappingChanged(String name, Object oldValue,
            Object newValue) {
        final Object[] myListeners = getListeners();
        if (myListeners.length > 0) {
            PropertyChangeEvent event = new PropertyChangeEvent(this, name,
                    oldValue, newValue);
            for (int i = 0; i < myListeners.length; ++i) {
                try {
                    ((IPropertyChangeListener) myListeners[i])
                            .propertyChange(event);

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