/**
 * 
 * @param event
 */
protected void firePageChanged( final PageChangedEvent event )
{
	Object[] listeners = pageChangedListeners.getListeners( );
	for ( int i = 0; i < listeners.length; i++ )
	{
		final IPageChangedListener l = (IPageChangedListener) listeners[i];
		SafeRunnable.run( new SafeRunnable( ) {

			public void run( )
			{
				l.pageChanged( event );
			}
		} );
	}
}
 

/**
 * Notifies any selection changed listeners that the selected page has
 * changed. Only listeners registered at the time this method is called
 * are notified.
 * 
 * @param event
 *            a selection changed event
 * 
 * @see IPageChangedListener#pageChanged
 * 
 * @since 2.1
 */
void firePageChanged( final PageChangedEvent event )
{
	Object[] listeners = pageChangedListeners.getListeners( );
	for ( int i = 0; i < listeners.length; i++ )
	{
		final IPageChangedListener l = (IPageChangedListener) listeners[i];
		SafeRunnable.run( new SafeRunnable( ) {

			public void run( )
			{
				l.pageChanged( event );
			}
		} );
	}
}
 

public void addPageChangedListener(IPageChangedListener listener) {
	pageChangedListeners.add(listener);
}
 

public void removePageChangedListener(IPageChangedListener listener) {
	pageChangedListeners.remove(listener);
}
 

public void addPageChangedListener(IPageChangedListener listener) {
	pageChangedListeners.add(listener);
}
 

public void removePageChangedListener(IPageChangedListener listener) {
	pageChangedListeners.remove(listener);
}
 

public void addPageChangedListener( IPageChangedListener listener )
{
	pageChangedListeners.add( listener );
}
 

public void removePageChangedListener( IPageChangedListener listener )
{
	pageChangedListeners.remove( listener );
}
 

public void addPageChangedListener( IPageChangedListener listener )
{
	pageChangedListeners.add( listener );
}
 

public void removePageChangedListener( IPageChangedListener listener )
{
	pageChangedListeners.remove( listener );
}
 

/**
 * Create an instance of {@link Wizard} from the builder
 */
public Wizard asWizard() {
    final Wizard wizard = new Wizard() {

        @Override
        public boolean performFinish() {
            pages.stream()
                    .map(WizardPageBuilder::getControlSupplier)
                    .filter(Objects::nonNull)
                    .forEachOrdered(controlSupplier -> controlSupplier.saveSettings(getDialogSettings()));
            try {
                if (finishHandler != null) {
                    finishResult = finishHandler.finish(getContainer());
                    return finishResult.isPresent();
                }
                return true;
            } catch (final Throwable t) {
                new ExceptionDialogHandler().openErrorDialog(getShell(), Messages.errorOccuredDuringFinish, t);
                return false;
            }
        }

        @Override
        public void setContainer(IWizardContainer wizardContainer) {
            super.setContainer(wizardContainer);
            if (wizardContainer instanceof IPageChangeProvider) {
                IWizardPage startingPage = getStartingPage();
                if (startingPage instanceof IPageChangedListener) {
                    ((IPageChangeProvider) wizardContainer)
                            .addPageChangedListener((IPageChangedListener) startingPage);
                }
            }
        }

    };
    pages.stream().forEachOrdered(page -> wizard.addPage(page.asPage()));
    wizard.setNeedsProgressMonitor(needProgress);
    wizard.setWindowTitle(windowTitle);
    wizard.setDefaultPageImageDescriptor(imageDescriptor);
    wizard.setDialogSettings(WorkbenchPlugin.getDefault().getDialogSettings());
    return wizard;
}
 

/**
 * Notifies any selection changed listeners that the selected page has
 * changed. Only listeners registered at the time this method is called are
 * notified.
 * 
 * @param event
 *            a selection changed event
 * 
 * @see IPageChangedListener#pageChanged
 * 
 * @since 3.1
 */
protected void firePageChanged(final PageChangedEvent event) {
	Object[] listeners = pageChangedListeners.getListeners();
	for (int i = 0; i < listeners.length; ++i) {
		final IPageChangedListener l = (IPageChangedListener) listeners[i];
		SafeRunnable.run(new SafeRunnable() {
			public void run() {
				l.pageChanged(event);
			}
		});
	}
}
 

/**
 * Notifies any selection changed listeners that the selected page has
 * changed. Only listeners registered at the time this method is called are
 * notified.
 * 
 * @param event
 *            a selection changed event
 * 
 * @see IPageChangedListener#pageChanged
 * 
 * @since 3.1
 */
protected void firePageChanged(final PageChangedEvent event) {
	Object[] listeners = pageChangedListeners.getListeners();
	for (int i = 0; i < listeners.length; ++i) {
		final IPageChangedListener l = (IPageChangedListener) listeners[i];
		SafeRunnable.run(new SafeRunnable() {
			public void run() {
				l.pageChanged(event);
			}
		});
	}
}