plugins/org.eclipse.bpmn2.modeler.core/src/org/eclipse/bpmn2/modeler/core/merrimac/clad/ListAndDetailCompositeBase.java - bpmn2-modeler/org.eclipse.bpmn2-modeler - Git at Google

 /*******************************************************************************
  * Copyright (c) 2011, 2012 Red Hat, Inc.
  * All rights reserved.
  * This program is made available under the terms of the
  * Eclipse Public License v1.0 which accompanies this distribution,
  * and is available at http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * Red Hat, Inc. - initial API and implementation
  *******************************************************************************/
 package org.eclipse.bpmn2.modeler.core.merrimac.clad;

 import java.util.ArrayList;
 import java.util.List;

 import org.eclipse.bpmn2.BaseElement;
 import org.eclipse.bpmn2.Bpmn2Package;
 import org.eclipse.bpmn2.modeler.core.Activator;
 import org.eclipse.bpmn2.modeler.core.merrimac.Bpmn2PropertyPageRedrawHandler;
 import org.eclipse.bpmn2.modeler.core.merrimac.DefaultBusinessObjectDelegate;
 import org.eclipse.bpmn2.modeler.core.merrimac.IBusinessObjectDelegate;
 import org.eclipse.bpmn2.modeler.core.merrimac.IConstants;
 import org.eclipse.bpmn2.modeler.core.model.ModelHandler;
 import org.eclipse.bpmn2.modeler.core.preferences.Bpmn2Preferences;
 import org.eclipse.bpmn2.modeler.core.preferences.ModelEnablements;
 import org.eclipse.bpmn2.modeler.core.runtime.TargetRuntime;
 import org.eclipse.bpmn2.modeler.core.utils.ModelUtil;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.emf.common.command.Command;
 import org.eclipse.emf.common.notify.Adapter;
 import org.eclipse.emf.common.notify.Notification;
 import org.eclipse.emf.common.notify.Notifier;
 import org.eclipse.emf.ecore.EClass;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.emf.ecore.EStructuralFeature;
 import org.eclipse.emf.ecore.InternalEObject;
 import org.eclipse.emf.ecore.impl.ENotificationImpl;
 import org.eclipse.emf.ecore.xml.type.XMLTypePackage;
 import org.eclipse.emf.edit.provider.INotifyChangedListener;
 import org.eclipse.emf.transaction.NotificationFilter;
 import org.eclipse.emf.transaction.ResourceSetChangeEvent;
 import org.eclipse.emf.transaction.ResourceSetListener;
 import org.eclipse.emf.transaction.RollbackException;
 import org.eclipse.emf.transaction.impl.TransactionalEditingDomainImpl;
 import org.eclipse.emf.validation.model.EvaluationMode;
 import org.eclipse.emf.validation.service.IValidator;
 import org.eclipse.emf.validation.service.ModelValidationService;
 import org.eclipse.graphiti.ui.editor.DiagramEditor;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.ui.IEditorPart;
 import org.eclipse.ui.IWorkbenchPart;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.forms.widgets.FormToolkit;
 import org.eclipse.ui.views.properties.PropertySheet;
 import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage;

 public class ListAndDetailCompositeBase extends Composite implements ResourceSetListener, Adapter {

 	public final static Bpmn2Package PACKAGE = Bpmn2Package.eINSTANCE;
 	@Deprecated
 	// use createModelObject() instead
 	//public final static Bpmn2Factory FACTORY = Bpmn2ModelerFactory.getInstance();
 	protected AbstractBpmn2PropertySection propertySection;
 	protected FormToolkit toolkit;
 	protected IPreferenceStore preferenceStore = Activator.getDefault().getPreferenceStore();
 	protected EObject businessObject;
 	protected int style;
 	protected DiagramEditor diagramEditor;
 	protected TransactionalEditingDomainImpl editingDomain;
 	protected ModelHandler modelHandler;
 	protected boolean isPopupDialog;
 	private IBusinessObjectDelegate boDelegate;

 	public ListAndDetailCompositeBase(AbstractBpmn2PropertySection section) {
 		this(section, SWT.NONE);
 	}

 	public ListAndDetailCompositeBase(AbstractBpmn2PropertySection section, int style) {
 		super(section.getParent(), style);
 		propertySection = section;
 		toolkit = propertySection.getWidgetFactory();
 		initialize();
 	}

 	public ListAndDetailCompositeBase(Composite parent, int style) {
 		super(parent, style);
 		toolkit = new FormToolkit(Display.getCurrent());
 		this.style = style;
 		initialize();
 	}

 	protected void initialize() {
 		GridLayout layout = new GridLayout(3, false);
 		layout.marginWidth = 0;
 		setLayout(layout);
 		if (getParent().getLayout() instanceof GridLayout) {
 			layout = (GridLayout) getParent().getLayout();
 			setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false, layout.numColumns, 1));
 		}
 		toolkit.adapt(this);
 		toolkit.paintBordersFor(this);
 	}

 	@Override
 	public void dispose() {
 		removeDomainListener();
 		removeChangeListener(businessObject);

 		ModelUtil.disposeChildWidgets(this);
 		super.dispose();
 	}

 	protected void addDomainListener() {
 		if (editingDomain == null) {
 			if (diagramEditor == null) {
 				if ((diagramEditor = getDiagramEditor()) == null)
 					return;
 			}
 			editingDomain = (TransactionalEditingDomainImpl)diagramEditor.getEditingDomain();
 			editingDomain.addResourceSetListener(this);
 		}
 	}

 	protected void removeDomainListener() {
 		if (editingDomain!=null) {
 			editingDomain.removeResourceSetListener(this);
 		}
 	}

 	public void setPropertySection(AbstractBpmn2PropertySection section) {
 		propertySection = section;
 	}

 	public AbstractBpmn2PropertySection getPropertySection() {
 		if (propertySection!=null)
 			return propertySection;
 		Composite parent = getParent();
 		while (parent!=null && !(parent instanceof ListAndDetailCompositeBase))
 			parent = parent.getParent();
 		if (parent instanceof ListAndDetailCompositeBase)
 			return ((ListAndDetailCompositeBase)parent).getPropertySection();
 		return null;
 	}

 	public IBusinessObjectDelegate getBusinessObjectDelegate() {
 		if (boDelegate==null)
 			boDelegate = new DefaultBusinessObjectDelegate(editingDomain);
 		return boDelegate;
 	}

 	/**
 	 * This is no longer need since it has been replaced with the
 	 * redraw UIJob in Bpmn2PropertyPageRoot.
 	 * @deprecated
 	 */
 	public synchronized void redrawPageAsync() {
 		redrawPage();
 	}

 	protected synchronized boolean needsRedraw() {
 		return Bpmn2PropertyPageRedrawHandler.needsRedraw(this);
 	}

 	public synchronized void redrawPage() {
 		Bpmn2PropertyPageRedrawHandler.redraw(this);
 	}

 	@Override
 	public void setVisible(boolean visible) {

 		// No need if already disposed.
 		if (isDisposed ())
 			return;

 		if (getLayoutData() instanceof GridData) {
 			((GridData)getLayoutData()).exclude = !visible;
 		}
 		super.setVisible(visible);
 		redrawPage();
 	}

 	public TabbedPropertySheetPage getTabbedPropertySheetPage() {
 		if (getPropertySection()!=null)
 			return getPropertySection().getTabbedPropertySheetPage();
 		return null;
 	}

 	public FormToolkit getToolkit() {
 		return toolkit;
 	}

 	public void setDiagramEditor(DiagramEditor bpmn2Editor) {
 		this.diagramEditor = bpmn2Editor;
 	}

 	public DiagramEditor getDiagramEditor() {
 		if (diagramEditor!=null)
 			return diagramEditor;
 		if (getPropertySection()!=null)
 			return (DiagramEditor)getPropertySection().getDiagramEditor();
 		Composite parent = getParent();
 		while (parent!=null && !(parent instanceof ListAndDetailCompositeBase))
 			parent = parent.getParent();
 		if (parent instanceof ListAndDetailCompositeBase)
 			return diagramEditor = ((ListAndDetailCompositeBase)parent).getDiagramEditor();

 		IWorkbenchPart part = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActivePart();
 		if (part instanceof DiagramEditor)
 			diagramEditor = (DiagramEditor)part;
 		else if (part instanceof IEditorPart) {
 			diagramEditor = (DiagramEditor) ((IEditorPart)part).getAdapter(DiagramEditor.class);
 		}
 		else if (part instanceof PropertySheet) {
 			TabbedPropertySheetPage page = (TabbedPropertySheetPage) ((PropertySheet)part).getCurrentPage();
 			if (page instanceof Bpmn2TabbedPropertySheetPage) {
 				diagramEditor = ((Bpmn2TabbedPropertySheetPage)page).getDiagramEditor();
 			}
 		}
 		return diagramEditor;
 	}

 	protected boolean isModelObjectEnabled(String className, String featureName) {
 		return getModelEnablements().isEnabled(className, featureName);
 	}

 	protected boolean isModelObjectEnabled(EClass eclass, EStructuralFeature feature) {
 		String className = eclass==null ? null : eclass.getName();
 		String featureName = feature==null ? null : feature.getName();
 		return isModelObjectEnabled(className, featureName);
 	}

 	protected boolean isModelObjectEnabled(EClass eclass) {
 		if (eclass!=null)
 			return isModelObjectEnabled(eclass,null);
 		return false;
 	}

 	protected ModelEnablements getModelEnablements() {
 		return (ModelEnablements)getDiagramEditor().getAdapter(ModelEnablements.class);
 	}

 	/**
 	 * Convenience method for creating and initializing new objects.
 	 *
 	 * @param clazz
 	 * @return
 	 */
 	protected <T extends EObject> T createModelObject(Class clazz) {
 		T object = getBusinessObjectDelegate().createObject(clazz);
 		return object;
 	}

 	public TargetRuntime getTargetRuntime() {
 		return (TargetRuntime) getDiagramEditor().getAdapter(TargetRuntime.class);
 	}

 	public Bpmn2Preferences getPreferences() {
 		return (Bpmn2Preferences) getDiagramEditor().getAdapter(Bpmn2Preferences.class);
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.swt.widgets.Widget#setData(java.lang.Object)
 	 */
 	@Override
 	public void setData(Object object) {
 		if (object instanceof EObject)
 			setBusinessObject((EObject)object);
 	}

 	public void setBusinessObject(EObject object) {
 		getDiagramEditor();
 		if (diagramEditor==null)
 			diagramEditor = ModelUtil.getEditor(object);
 		addDomainListener();
 		modelHandler = ModelHandler.getInstance(getDiagramEditor().getDiagramTypeProvider().getDiagram());
 		removeChangeListener(businessObject);
 		businessObject = object;
 		addChangeListener(businessObject);

 		// Do initial validation to force display of error message if any
 		validate();
 	}

 	protected void addChangeListener(EObject object) {
 		if (object!=null && !object.eAdapters().contains(this))
 			object.eAdapters().add(this);
 	}

 	protected void removeChangeListener(EObject object) {
 		if (object!=null && object.eAdapters().contains(this)) {
 			object.eSetDeliver(false);
 			object.eAdapters().remove(this);
 			object.eSetDeliver(true);
 		}
 	}

 	public final EObject getBusinessObject() {
 		return businessObject;
 	}

 	@Override
 	public NotificationFilter getFilter() {
 		NotificationFilter filter = null;
 		// the editor needs to return a "do nothing" filter while a save is in progress
 		if (diagramEditor!=null)
 			filter = (NotificationFilter)diagramEditor.getAdapter(NotificationFilter.class);
 		if (filter==null) {
 			filter = NotificationFilter.NOT_TOUCH;
 		}
 		return filter;
 	}

 	@Override
 	public Command transactionAboutToCommit(ResourceSetChangeEvent event)
 			throws RollbackException {
 		// TODO Auto-generated method stub
 		return null;
 	}

 	protected void getAllChildWidgets(Composite parent, List<Control>kids) {
 		if (parent!=null && !parent.isDisposed()) {
 			Control[] cs = parent.getChildren();
 			for (Control c : cs) {
 				if (c instanceof Composite) {
 					getAllChildWidgets((Composite)c,kids);
 				}
 				if (!c.isDisposed() &&
 					c.getData(IConstants.NOTIFY_CHANGE_LISTENER_KEY) instanceof INotifyChangedListener) {
 						kids.add(c);
 				}
 			}
 		}
 	}

 	// TODO: Figure out a broader method of detecting model changes.
 	// This listener is only called AFTER a transaction has committed,
 	// it will not receive notification of model changes inside a txn.
 	// So, while this works in the Property Sheet pages, things like
 	// the ObjectEditingDialog (which makes changes in the current txn)
 	// will not cause other widgets in the dialog to be notified.
 	@Override
 	public void resourceSetChanged(ResourceSetChangeEvent event) {
 		final List<Notification> notifications = new ArrayList<Notification>();
 		List<Notification> eventNotifications = event.getNotifications();
 		NotificationFilter filter = getFilter();
 		for (int i=eventNotifications.size()-1; i>=0; --i) {
 			Notification n = eventNotifications.get(i);
 			// We are only interested in notifications that affect BaseElements
 			// since the {@link ObjectEditor} children only work with these objects.
 			if (n.getNotifier() instanceof BaseElement) {
 				if (filter.matches(n)) {
 					boolean add = true;
 					if (n.getFeature() instanceof EStructuralFeature) {
 						EStructuralFeature f = (EStructuralFeature)n.getFeature();
 						EClass ec = f.getEContainingClass();
 						// Attempt to reduce the number of notifications to process:
 						// notifications for the XMLTypePackage are inconsequential
 						if (ec.getEPackage()==XMLTypePackage.eINSTANCE)
 							add = false;
 					}
 					for (Notification n2 : notifications) {
 						if (n2.getNotifier()==n.getNotifier() && n2.getFeature()==n.getFeature()) {
 							add = false;
 							break;
 						}
 					}
 					if (add)
 					{
 						notifications.add(n);
 					}
 				}
 			}
 		}
 //		System.out.println("resource changed: "+this.getClass().getSimpleName()+" "+notifications.size()+" notifications");
 		// run this in the UI thread
 		Display.getDefault().asyncExec( new Runnable() {
 			public void run() {
 				Composite parent = ListAndDetailCompositeBase.this;
 				if (!parent.isDisposed()) {
 					List<Control>kids = new ArrayList<Control>();
 					try {
 						AbstractBpmn2PropertySection section = ListAndDetailCompositeBase.this.getPropertySection();
 						if (section!=null && section.getTabbedPropertySheetPage()!=null) {
 							parent = (Composite)section.getTabbedPropertySheetPage().getControl();
 						}
 					}
 					catch (Exception e) {
 						return;
 					}

 					boolean firstTime = true;
 					for (Notification n : notifications) {
 						if (getFilter().matches(n)) {
 							if (n.getFeature() instanceof EStructuralFeature) {
 	//							EStructuralFeature f = (EStructuralFeature)n.getFeature();
 	//							EClass ec = (EClass)f.eContainer();
 	//							String et;
 	//							switch (n.getEventType()){
 	//							case Notification.SET: et = "SET"; break;
 	//							case Notification.UNSET: et = "UNSET"; break;
 	//							case Notification.ADD: et = "ADD"; break;
 	//							case Notification.ADD_MANY: et = "ADD_MANY"; break;
 	//							case Notification.REMOVE: et = "REMOVE"; break;
 	//							case Notification.REMOVE_MANY: et = "REMOVE_MANY"; break;
 	//							default: et = "UNKNOWN";
 	//							}
 	//							System.out.println("sending notification: "+
 	//									ec.getEPackage().getName()+":"+ec.getName()+"."+f.getName()+"   "+et+" old="+n.getOldStringValue()+" new="+n.getNewStringValue());
 								if (firstTime) {
 									getAllChildWidgets(parent, kids);
 									firstTime = false;
 								}
 								for (Control c : kids) {
 									if (!c.isDisposed() && c.isVisible()) {
 										INotifyChangedListener listener = (INotifyChangedListener)c.getData(
 												IConstants.NOTIFY_CHANGE_LISTENER_KEY);
 										if (listener!=null) {
 	//										System.out.println("    "+listener.getClass().getSimpleName());
 											listener.notifyChanged(n);
 										}
 									}
 								}
 							}
 						}
 					}
 				}
 			}
 		});
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.emf.transaction.ResourceSetListener#isAggregatePrecommitListener()
 	 */
 	@Override
 	public boolean isAggregatePrecommitListener() {
 		// TODO Auto-generated method stub
 		return false;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.emf.transaction.ResourceSetListener#isPrecommitOnly()
 	 */
 	@Override
 	public boolean isPrecommitOnly() {
 		// TODO Auto-generated method stub
 		return false;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.emf.transaction.ResourceSetListener#isPostcommitOnly()
 	 */
 	@Override
 	public boolean isPostcommitOnly() {
 		// TODO Auto-generated method stub
 		return false;
 	}

 	public void setIsPopupDialog(boolean isPopupDialog) {
 		this.isPopupDialog = isPopupDialog;
 	}

 	public IStatus validate() {
     	Notification n = new ENotificationImpl((InternalEObject) businessObject, 0, null, null, null, false);
     	return validate(n);
 	}

 	protected IStatus validate(Notification notification) {
 		IValidator<Notification> validator = ModelValidationService.getInstance().newValidator(EvaluationMode.LIVE);
 		return validator.validate(notification);
 	}

 	@Override
 	public void notifyChanged(Notification notification) {
 		validate(notification);
 	}

 	@Override
 	public Notifier getTarget() {
 		return null;
 	}

 	@Override
 	public void setTarget(Notifier newTarget) {
 	}

 	@Override
 	public boolean isAdapterForType(Object type) {
 		return false;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2011, 2012 Red Hat, Inc.
	* All rights reserved.
	* This program is made available under the terms of the
	* Eclipse Public License v1.0 which accompanies this distribution,
	* and is available at http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* Red Hat, Inc. - initial API and implementation
	*******************************************************************************/
	package org.eclipse.bpmn2.modeler.core.merrimac.clad;

	import java.util.ArrayList;
	import java.util.List;

	import org.eclipse.bpmn2.BaseElement;
	import org.eclipse.bpmn2.Bpmn2Package;
	import org.eclipse.bpmn2.modeler.core.Activator;
	import org.eclipse.bpmn2.modeler.core.merrimac.Bpmn2PropertyPageRedrawHandler;
	import org.eclipse.bpmn2.modeler.core.merrimac.DefaultBusinessObjectDelegate;
	import org.eclipse.bpmn2.modeler.core.merrimac.IBusinessObjectDelegate;
	import org.eclipse.bpmn2.modeler.core.merrimac.IConstants;
	import org.eclipse.bpmn2.modeler.core.model.ModelHandler;
	import org.eclipse.bpmn2.modeler.core.preferences.Bpmn2Preferences;
	import org.eclipse.bpmn2.modeler.core.preferences.ModelEnablements;
	import org.eclipse.bpmn2.modeler.core.runtime.TargetRuntime;
	import org.eclipse.bpmn2.modeler.core.utils.ModelUtil;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.emf.common.command.Command;
	import org.eclipse.emf.common.notify.Adapter;
	import org.eclipse.emf.common.notify.Notification;
	import org.eclipse.emf.common.notify.Notifier;
	import org.eclipse.emf.ecore.EClass;
	import org.eclipse.emf.ecore.EObject;
	import org.eclipse.emf.ecore.EStructuralFeature;
	import org.eclipse.emf.ecore.InternalEObject;
	import org.eclipse.emf.ecore.impl.ENotificationImpl;
	import org.eclipse.emf.ecore.xml.type.XMLTypePackage;
	import org.eclipse.emf.edit.provider.INotifyChangedListener;
	import org.eclipse.emf.transaction.NotificationFilter;
	import org.eclipse.emf.transaction.ResourceSetChangeEvent;
	import org.eclipse.emf.transaction.ResourceSetListener;
	import org.eclipse.emf.transaction.RollbackException;
	import org.eclipse.emf.transaction.impl.TransactionalEditingDomainImpl;
	import org.eclipse.emf.validation.model.EvaluationMode;
	import org.eclipse.emf.validation.service.IValidator;
	import org.eclipse.emf.validation.service.ModelValidationService;
	import org.eclipse.graphiti.ui.editor.DiagramEditor;
	import org.eclipse.jface.preference.IPreferenceStore;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.ui.IEditorPart;
	import org.eclipse.ui.IWorkbenchPart;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.forms.widgets.FormToolkit;
	import org.eclipse.ui.views.properties.PropertySheet;
	import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage;

	public class ListAndDetailCompositeBase extends Composite implements ResourceSetListener, Adapter {

	public final static Bpmn2Package PACKAGE = Bpmn2Package.eINSTANCE;
	@Deprecated
	// use createModelObject() instead
	//public final static Bpmn2Factory FACTORY = Bpmn2ModelerFactory.getInstance();
	protected AbstractBpmn2PropertySection propertySection;
	protected FormToolkit toolkit;
	protected IPreferenceStore preferenceStore = Activator.getDefault().getPreferenceStore();
	protected EObject businessObject;
	protected int style;
	protected DiagramEditor diagramEditor;
	protected TransactionalEditingDomainImpl editingDomain;
	protected ModelHandler modelHandler;
	protected boolean isPopupDialog;
	private IBusinessObjectDelegate boDelegate;

	public ListAndDetailCompositeBase(AbstractBpmn2PropertySection section) {
	this(section, SWT.NONE);
	}

	public ListAndDetailCompositeBase(AbstractBpmn2PropertySection section, int style) {
	super(section.getParent(), style);
	propertySection = section;
	toolkit = propertySection.getWidgetFactory();
	initialize();
	}

	public ListAndDetailCompositeBase(Composite parent, int style) {
	super(parent, style);
	toolkit = new FormToolkit(Display.getCurrent());
	this.style = style;
	initialize();
	}

	protected void initialize() {
	GridLayout layout = new GridLayout(3, false);
	layout.marginWidth = 0;
	setLayout(layout);
	if (getParent().getLayout() instanceof GridLayout) {
	layout = (GridLayout) getParent().getLayout();
	setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false, layout.numColumns, 1));
	}
	toolkit.adapt(this);
	toolkit.paintBordersFor(this);
	}

	@Override
	public void dispose() {
	removeDomainListener();
	removeChangeListener(businessObject);

	ModelUtil.disposeChildWidgets(this);
	super.dispose();
	}

	protected void addDomainListener() {
	if (editingDomain == null) {
	if (diagramEditor == null) {
	if ((diagramEditor = getDiagramEditor()) == null)
	return;
	}
	editingDomain = (TransactionalEditingDomainImpl)diagramEditor.getEditingDomain();
	editingDomain.addResourceSetListener(this);
	}
	}

	protected void removeDomainListener() {
	if (editingDomain!=null) {
	editingDomain.removeResourceSetListener(this);
	}
	}

	public void setPropertySection(AbstractBpmn2PropertySection section) {
	propertySection = section;
	}

	public AbstractBpmn2PropertySection getPropertySection() {
	if (propertySection!=null)
	return propertySection;
	Composite parent = getParent();
	while (parent!=null && !(parent instanceof ListAndDetailCompositeBase))
	parent = parent.getParent();
	if (parent instanceof ListAndDetailCompositeBase)
	return ((ListAndDetailCompositeBase)parent).getPropertySection();
	return null;
	}

	public IBusinessObjectDelegate getBusinessObjectDelegate() {
	if (boDelegate==null)
	boDelegate = new DefaultBusinessObjectDelegate(editingDomain);
	return boDelegate;
	}

	/**
	* This is no longer need since it has been replaced with the
	* redraw UIJob in Bpmn2PropertyPageRoot.
	* @deprecated
	*/
	public synchronized void redrawPageAsync() {
	redrawPage();
	}

	protected synchronized boolean needsRedraw() {
	return Bpmn2PropertyPageRedrawHandler.needsRedraw(this);
	}

	public synchronized void redrawPage() {
	Bpmn2PropertyPageRedrawHandler.redraw(this);
	}

	@Override
	public void setVisible(boolean visible) {

	// No need if already disposed.
	if (isDisposed ())
	return;

	if (getLayoutData() instanceof GridData) {
	((GridData)getLayoutData()).exclude = !visible;
	}
	super.setVisible(visible);
	redrawPage();
	}

	public TabbedPropertySheetPage getTabbedPropertySheetPage() {
	if (getPropertySection()!=null)
	return getPropertySection().getTabbedPropertySheetPage();
	return null;
	}

	public FormToolkit getToolkit() {
	return toolkit;
	}

	public void setDiagramEditor(DiagramEditor bpmn2Editor) {
	this.diagramEditor = bpmn2Editor;
	}

	public DiagramEditor getDiagramEditor() {
	if (diagramEditor!=null)
	return diagramEditor;
	if (getPropertySection()!=null)
	return (DiagramEditor)getPropertySection().getDiagramEditor();
	Composite parent = getParent();
	while (parent!=null && !(parent instanceof ListAndDetailCompositeBase))
	parent = parent.getParent();
	if (parent instanceof ListAndDetailCompositeBase)
	return diagramEditor = ((ListAndDetailCompositeBase)parent).getDiagramEditor();

	IWorkbenchPart part = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActivePart();
	if (part instanceof DiagramEditor)
	diagramEditor = (DiagramEditor)part;
	else if (part instanceof IEditorPart) {
	diagramEditor = (DiagramEditor) ((IEditorPart)part).getAdapter(DiagramEditor.class);
	}
	else if (part instanceof PropertySheet) {
	TabbedPropertySheetPage page = (TabbedPropertySheetPage) ((PropertySheet)part).getCurrentPage();
	if (page instanceof Bpmn2TabbedPropertySheetPage) {
	diagramEditor = ((Bpmn2TabbedPropertySheetPage)page).getDiagramEditor();
	}
	}
	return diagramEditor;
	}

	protected boolean isModelObjectEnabled(String className, String featureName) {
	return getModelEnablements().isEnabled(className, featureName);
	}

	protected boolean isModelObjectEnabled(EClass eclass, EStructuralFeature feature) {
	String className = eclass==null ? null : eclass.getName();
	String featureName = feature==null ? null : feature.getName();
	return isModelObjectEnabled(className, featureName);
	}

	protected boolean isModelObjectEnabled(EClass eclass) {
	if (eclass!=null)
	return isModelObjectEnabled(eclass,null);
	return false;
	}

	protected ModelEnablements getModelEnablements() {
	return (ModelEnablements)getDiagramEditor().getAdapter(ModelEnablements.class);
	}

	/**
	* Convenience method for creating and initializing new objects.
	*
	* @param clazz
	* @return
	*/
	protected <T extends EObject> T createModelObject(Class clazz) {
	T object = getBusinessObjectDelegate().createObject(clazz);
	return object;
	}

	public TargetRuntime getTargetRuntime() {
	return (TargetRuntime) getDiagramEditor().getAdapter(TargetRuntime.class);
	}

	public Bpmn2Preferences getPreferences() {
	return (Bpmn2Preferences) getDiagramEditor().getAdapter(Bpmn2Preferences.class);
	}

	/* (non-Javadoc)
	* @see org.eclipse.swt.widgets.Widget#setData(java.lang.Object)
	*/
	@Override
	public void setData(Object object) {
	if (object instanceof EObject)
	setBusinessObject((EObject)object);
	}

	public void setBusinessObject(EObject object) {
	getDiagramEditor();
	if (diagramEditor==null)
	diagramEditor = ModelUtil.getEditor(object);
	addDomainListener();
	modelHandler = ModelHandler.getInstance(getDiagramEditor().getDiagramTypeProvider().getDiagram());
	removeChangeListener(businessObject);
	businessObject = object;
	addChangeListener(businessObject);

	// Do initial validation to force display of error message if any
	validate();
	}

	protected void addChangeListener(EObject object) {
	if (object!=null && !object.eAdapters().contains(this))
	object.eAdapters().add(this);
	}

	protected void removeChangeListener(EObject object) {
	if (object!=null && object.eAdapters().contains(this)) {
	object.eSetDeliver(false);
	object.eAdapters().remove(this);
	object.eSetDeliver(true);
	}
	}

	public final EObject getBusinessObject() {
	return businessObject;
	}

	@Override
	public NotificationFilter getFilter() {
	NotificationFilter filter = null;
	// the editor needs to return a "do nothing" filter while a save is in progress
	if (diagramEditor!=null)
	filter = (NotificationFilter)diagramEditor.getAdapter(NotificationFilter.class);
	if (filter==null) {
	filter = NotificationFilter.NOT_TOUCH;
	}
	return filter;
	}

	@Override
	public Command transactionAboutToCommit(ResourceSetChangeEvent event)
	throws RollbackException {
	// TODO Auto-generated method stub
	return null;
	}

	protected void getAllChildWidgets(Composite parent, List<Control>kids) {
	if (parent!=null && !parent.isDisposed()) {
	Control[] cs = parent.getChildren();
	for (Control c : cs) {
	if (c instanceof Composite) {
	getAllChildWidgets((Composite)c,kids);
	}
	if (!c.isDisposed() &&
	c.getData(IConstants.NOTIFY_CHANGE_LISTENER_KEY) instanceof INotifyChangedListener) {
	kids.add(c);
	}
	}
	}
	}

	// TODO: Figure out a broader method of detecting model changes.
	// This listener is only called AFTER a transaction has committed,
	// it will not receive notification of model changes inside a txn.
	// So, while this works in the Property Sheet pages, things like
	// the ObjectEditingDialog (which makes changes in the current txn)
	// will not cause other widgets in the dialog to be notified.
	@Override
	public void resourceSetChanged(ResourceSetChangeEvent event) {
	final List<Notification> notifications = new ArrayList<Notification>();
	List<Notification> eventNotifications = event.getNotifications();
	NotificationFilter filter = getFilter();
	for (int i=eventNotifications.size()-1; i>=0; --i) {
	Notification n = eventNotifications.get(i);
	// We are only interested in notifications that affect BaseElements
	// since the {@link ObjectEditor} children only work with these objects.
	if (n.getNotifier() instanceof BaseElement) {
	if (filter.matches(n)) {
	boolean add = true;
	if (n.getFeature() instanceof EStructuralFeature) {
	EStructuralFeature f = (EStructuralFeature)n.getFeature();
	EClass ec = f.getEContainingClass();
	// Attempt to reduce the number of notifications to process:
	// notifications for the XMLTypePackage are inconsequential
	if (ec.getEPackage()==XMLTypePackage.eINSTANCE)
	add = false;
	}
	for (Notification n2 : notifications) {
	if (n2.getNotifier()==n.getNotifier() && n2.getFeature()==n.getFeature()) {
	add = false;
	break;
	}
	}
	if (add)
	{
	notifications.add(n);
	}
	}
	}
	}
	// System.out.println("resource changed: "+this.getClass().getSimpleName()+" "+notifications.size()+" notifications");
	// run this in the UI thread
	Display.getDefault().asyncExec( new Runnable() {
	public void run() {
	Composite parent = ListAndDetailCompositeBase.this;
	if (!parent.isDisposed()) {
	List<Control>kids = new ArrayList<Control>();
	try {
	AbstractBpmn2PropertySection section = ListAndDetailCompositeBase.this.getPropertySection();
	if (section!=null && section.getTabbedPropertySheetPage()!=null) {
	parent = (Composite)section.getTabbedPropertySheetPage().getControl();
	}
	}
	catch (Exception e) {
	return;
	}

	boolean firstTime = true;
	for (Notification n : notifications) {
	if (getFilter().matches(n)) {
	if (n.getFeature() instanceof EStructuralFeature) {
	// EStructuralFeature f = (EStructuralFeature)n.getFeature();
	// EClass ec = (EClass)f.eContainer();
	// String et;
	// switch (n.getEventType()){
	// case Notification.SET: et = "SET"; break;
	// case Notification.UNSET: et = "UNSET"; break;
	// case Notification.ADD: et = "ADD"; break;
	// case Notification.ADD_MANY: et = "ADD_MANY"; break;
	// case Notification.REMOVE: et = "REMOVE"; break;
	// case Notification.REMOVE_MANY: et = "REMOVE_MANY"; break;
	// default: et = "UNKNOWN";
	// }
	// System.out.println("sending notification: "+
	// ec.getEPackage().getName()+":"+ec.getName()+"."+f.getName()+" "+et+" old="+n.getOldStringValue()+" new="+n.getNewStringValue());
	if (firstTime) {
	getAllChildWidgets(parent, kids);
	firstTime = false;
	}
	for (Control c : kids) {
	if (!c.isDisposed() && c.isVisible()) {
	INotifyChangedListener listener = (INotifyChangedListener)c.getData(
	IConstants.NOTIFY_CHANGE_LISTENER_KEY);
	if (listener!=null) {
	// System.out.println(" "+listener.getClass().getSimpleName());
	listener.notifyChanged(n);
	}
	}
	}
	}
	}
	}
	}
	}
	});
	}

	/* (non-Javadoc)
	* @see org.eclipse.emf.transaction.ResourceSetListener#isAggregatePrecommitListener()
	*/
	@Override
	public boolean isAggregatePrecommitListener() {
	// TODO Auto-generated method stub
	return false;
	}

	/* (non-Javadoc)
	* @see org.eclipse.emf.transaction.ResourceSetListener#isPrecommitOnly()
	*/
	@Override
	public boolean isPrecommitOnly() {
	// TODO Auto-generated method stub
	return false;
	}

	/* (non-Javadoc)
	* @see org.eclipse.emf.transaction.ResourceSetListener#isPostcommitOnly()
	*/
	@Override
	public boolean isPostcommitOnly() {
	// TODO Auto-generated method stub
	return false;
	}

	public void setIsPopupDialog(boolean isPopupDialog) {
	this.isPopupDialog = isPopupDialog;
	}

	public IStatus validate() {
	Notification n = new ENotificationImpl((InternalEObject) businessObject, 0, null, null, null, false);
	return validate(n);
	}

	protected IStatus validate(Notification notification) {
	IValidator<Notification> validator = ModelValidationService.getInstance().newValidator(EvaluationMode.LIVE);
	return validator.validate(notification);
	}

	@Override
	public void notifyChanged(Notification notification) {
	validate(notification);
	}

	@Override
	public Notifier getTarget() {
	return null;
	}

	@Override
	public void setTarget(Notifier newTarget) {
	}

	@Override
	public boolean isAdapterForType(Object type) {
	return false;
	}
	}