bundles/org.eclipse.wst.wsdl.ui/src/org/eclipse/wst/wsdl/ui/internal/graph/editparts/DefinitionEditPart.java - webservices/webtools.webservices - Git at Google

 /*******************************************************************************
  * Copyright (c) 2001, 2004 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are 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:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.wst.wsdl.ui.internal.graph.editparts;

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

 import org.eclipse.draw2d.ColorConstants;
 import org.eclipse.draw2d.IFigure;
 import org.eclipse.draw2d.Label;
 import org.eclipse.draw2d.MarginBorder;
 import org.eclipse.gef.EditPart;
 import org.eclipse.gef.editparts.AbstractGraphicalEditPart;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.wst.wsdl.Definition;
 import org.eclipse.wst.wsdl.Import;
 import org.eclipse.wst.wsdl.ui.internal.WSDLEditorPlugin;
 import org.eclipse.wst.wsdl.ui.internal.gef.util.figures.RoundedLineBorder;
 import org.eclipse.wst.wsdl.ui.internal.model.WSDLGroupObject;
 import org.eclipse.wst.wsdl.ui.internal.util.OpenOnSelectionHelper;

 import org.eclipse.wst.xsd.ui.internal.gef.util.figures.ContainerFigure;
 import org.eclipse.wst.xsd.ui.internal.gef.util.figures.ContainerLayout;
 import org.eclipse.wst.xsd.ui.internal.gef.util.figures.FillLayout;

 public class DefinitionEditPart extends WSDLEditPart implements ISelectionChangedListener //, ModelAdapterListener
 {
   protected Label label;
   protected ContainerFigure outlined;

   protected ContainerFigure rightContentPane;
   protected ContainerFigure topContentPane;
   protected ContainerFigure middleContentPane;
   protected ContainerFigure bottomContentPane;
   protected static final String SELECTED_EDIT_PART_REFERENCE = "SELECTED_EDIT_PART_REFERENCE";

   public void activate()
   {
     super.activate();
     getViewer().addSelectionChangedListener(this);
   }
   /**
    * Apart from the deactivation done in super, the source
    * and target connections are deactivated, and the visual
    * part of the this is removed.
    *
    * @see #activate()
    */
   public void deactivate()
   {
     getViewer().removeSelectionChangedListener(this);
     super.deactivate();
   }

   protected IFigure[] initContentPanes()
   {
     IFigure[] contentPanes = new IFigure[4];
     contentPanes[0] = rightContentPane;
     contentPanes[1] = topContentPane;
     contentPanes[2] = middleContentPane;
     contentPanes[3] = bottomContentPane;
     return contentPanes;
   }

   protected int getContentPane(Object model)
   {
     int result = 0;

     if (model == SELECTED_EDIT_PART_REFERENCE)
     {
       result = 0;
     }
     else if (model instanceof WSDLGroupObject)
     {
       WSDLGroupObject groupObject = (WSDLGroupObject)model;
       switch (groupObject.getType())
       {
         case WSDLGroupObject.IMPORTS_GROUP :
         case WSDLGroupObject.TYPES_GROUP :
           //case WSDLGroupObject.EXTENSIBILITY_ELEMENTS_GROUP :
           {
             result = 1;
             break;
           }
         case WSDLGroupObject.BINDINGS_GROUP :
         case WSDLGroupObject.MESSAGES_GROUP :
         case WSDLGroupObject.PORT_TYPES_GROUP :
         case WSDLGroupObject.SERVICES_GROUP :
           {
             result = 2;
             break;
           }
         case WSDLGroupObject.EXTENSIBILITY_ELEMENTS_GROUP :
           {
             result = 3;
             break;
           }
       }
     }
     return result;
   }

   protected EditPart createChild(Object model)
   {
     EditPart editPart = null;
     if (model == SELECTED_EDIT_PART_REFERENCE)
     {
       editPart = new PartReferenceSectionEditPart();
       editPart.setModel(model);
       editPart.setParent(this);
     }
     else
     {
       editPart = super.createChild(model);
     }
     return editPart;
   }

   protected IFigure createFigure()
   {
     ContainerFigure outer = new ContainerFigure();
     ContainerLayout anchoredLayout = new ContainerLayout()
     {
       protected int alignFigure(IFigure parent, IFigure child)
       {
         return (child == outlined) ? 0 : -1;
       }
     };
     outer.setLayoutManager(anchoredLayout);
     /*
     ContainerFigure outer = new ConnectedEditPartFigure(this)
     {
       public IFigure getConnectionFigure()
       {
         return selectedPartEditPart != null ? selectedPartEditPart.getFigure() : this;
       }
     };*/
     outer.getContainerLayout().setHorizontal(true);
     //outer.setBorder(new MarginBorder(0, 20, 0, 0));

     outlined = new ContainerFigure();
     outer.add(outlined);
     //outlined.getContainerLayout().setHorizontal(false);
     outlined.setLayoutManager(new FillLayout());
     outlined.setBorder(new RoundedLineBorder(1, 6));
     outlined.setForegroundColor(groupBorderColor);

     ContainerFigure rightPane = new ContainerFigure();
     rightPane.setBorder(new MarginBorder(0, 0, 0, 300));
     rightPane.getContainerLayout().setHorizontal(false);
     outer.add(rightPane);

     //RectangleFigure spacer = new RectangleFigure();
     //rightPane.add(spacer);
     //spacer.setPreferredSize(new Dimension(450, 200));

     rightContentPane = new ContainerFigure();
     rightPane.add(rightContentPane);
     rightContentPane.setBorder(new MarginBorder(15, 20, 15, 15));

     ContainerFigure labelHolder = new ContainerFigure();
     outlined.add(labelHolder);

     label = new Label();
     labelHolder.add(label);
     label.setBorder(new MarginBorder(2, 5, 0, 5));
     label.setFont(mediumFont);
     label.setText(WSDLEditorPlugin.getWSDLString("_UI_LABEL_DEFINITION"));
     label.setForegroundColor(ColorConstants.black);

     topContentPane = new ContainerFigure();
     outlined.add(topContentPane);

     FillLayout fillLayout = new FillLayout(15);
     fillLayout.setHorizontal(true);
     topContentPane.setLayoutManager(fillLayout);
     topContentPane.setBorder(new MarginBorder(10, 10, 10, 10));

     middleContentPane = new ContainerFigure();
     outlined.add(middleContentPane);
     fillLayout = new FillLayout(15);
     fillLayout.setHorizontal(true);
     middleContentPane.setLayoutManager(fillLayout);
     middleContentPane.setBorder(new MarginBorder(0, 10, 10, 10));

     bottomContentPane = new ContainerFigure();
     outlined.add(bottomContentPane);
     bottomContentPane.setLayoutManager(new FillLayout());
     bottomContentPane.setBorder(new MarginBorder(0, 10, 10, 10));

     return outer;
   }

   //public IFigure getContentPane()
   //{
   //  return contentPane;
   //}
   public PartReferenceSectionEditPart getPartReferenceSectionEditPart()
   {
     PartReferenceSectionEditPart result = null;
     for (Iterator i = getChildren().iterator(); i.hasNext();)
     {
       EditPart editPart = (EditPart)i.next();
       if (editPart.getModel() == SELECTED_EDIT_PART_REFERENCE)
       {
         result = (PartReferenceSectionEditPart)editPart;
         break;
       }
     }
     return result;
   }

   public GroupEditPart getGroupEditPart(int type)
   {
     GroupEditPart result = null;
     for (Iterator i = getChildren().iterator(); i.hasNext();)
     {
       Object o = i.next();
       if (o instanceof GroupEditPart)
       {
         GroupEditPart groupEditPart = (GroupEditPart)o;
         if (groupEditPart.getType() == type)
         {
           result = groupEditPart;
           break;
         }
       }
     }
     return result;
   }

   public List getModelChildren()
   {
     List list = new ArrayList();
     list.add(SELECTED_EDIT_PART_REFERENCE);
     list.addAll(super.getModelChildren());
     return list;
   }

   public void handleOpenRequest(EditPart editPart)
   {
     GroupEditPart groupEditPart = null;
     if (editPart.getModel() instanceof Import)
     {
       Import theImport = (Import)editPart.getModel();
       Definition definition = (Definition)getModel();
       OpenOnSelectionHelper helper = new OpenOnSelectionHelper(definition);
       helper.openEditor(theImport);
     }
     else
     {
       for (EditPart parent = (EditPart)editPart.getParent(); parent != null; parent = parent.getParent())
       {
         if (parent instanceof GroupEditPart)
         {
           groupEditPart = (GroupEditPart)parent;
           break;
         }
       }

       if (groupEditPart != null)
       {
         GroupEditPart nextGroupEditPart = groupEditPart.getNext();
         if (nextGroupEditPart != null)
         {
           if (nextGroupEditPart.inputConnection instanceof TreeNodeEditPart)
           {
             ((TreeNodeEditPart) (nextGroupEditPart.inputConnection)).setExpanded(true);
           }
         }
         GroupEditPart prevGroupEditPart = groupEditPart.getPrevious();
         if (prevGroupEditPart != null)
         {
           if (prevGroupEditPart.outputConnection instanceof TreeNodeEditPart)
           {
             ((TreeNodeEditPart) (prevGroupEditPart.outputConnection)).setExpanded(true);
           }
         }
       }
       updateConnections();
     }
   }

   public void selectionChanged(SelectionChangedEvent event)
   {
     updateConnections();
   }

   public void updateConnections()
   {
     // todo
     if (isActive())
     {
       try
       {
         final AbstractGraphicalEditPart selectedEditPart = getSelectedEditPart(getViewer().getSelection());
         GroupEditPart group = getContainingGroup(selectedEditPart);
         if (group != null && group.getConnectionManager() != null)
         {
           group.getConnectionManager().setSelectedModelObject(selectedEditPart.getModel());
         }
         else if (!isAncestor(getPartReferenceSectionEditPart(), selectedEditPart))
         {
           group = getGroupEditPart(WSDLGroupObject.PORT_TYPES_GROUP);
           group.getConnectionManager().setSelectedModelObject(null);
         }
       }
       catch (Exception e)
       {
         e.printStackTrace();
       }
     }
   }

   public GroupEditPart getContainingGroup(AbstractGraphicalEditPart editPart)
   {
     GroupEditPart result = null;
     for (EditPart parent = editPart.getParent(); parent != null; parent = parent.getParent())
     {
       if (parent instanceof GroupEditPart)
       {
         result = (GroupEditPart)parent;
         break;
       }
     }
     return result;
   }

   public GroupEditPart getNextGroupEditPart(GroupEditPart groupEditPart)
   {
     GroupEditPart result = null;
     GroupEditPart prev = null;
     for (Iterator i = getChildren().iterator(); i.hasNext();)
     {
       Object o = i.next();
       if (o instanceof GroupEditPart)
       {
         GroupEditPart editPart = (GroupEditPart)o;
         if (prev == groupEditPart)
         {
           result = editPart;
           break;
         }
         prev = editPart;
       }
     }
     return result;
   }

   public GroupEditPart getPreviousGroupEditPart(GroupEditPart groupEditPart)
   {
     GroupEditPart prev = null;
     for (Iterator i = getChildren().iterator(); i.hasNext();)
     {
       Object o = i.next();
       if (o instanceof GroupEditPart)
       {
         GroupEditPart editPart = (GroupEditPart)o;
         if (editPart == groupEditPart)
         {
           break;
         }
         prev = editPart;
       }
     }
     return prev;
   }

   protected AbstractGraphicalEditPart getSelectedEditPart(ISelection selection)
   {
     AbstractGraphicalEditPart editPart = null;
     if (selection instanceof IStructuredSelection)
     {
       IStructuredSelection s = (IStructuredSelection)selection;
       Object first = s.getFirstElement();
       if (first instanceof AbstractGraphicalEditPart)
       {
         editPart = (AbstractGraphicalEditPart)first;
       }
     }
     return editPart;
   }

   public void refreshChildren()
   {
     super.refreshChildren();
     updateConnections();
   }

   public boolean isAncestor(EditPart ancestor, EditPart child)
   {
     boolean result = false;
     if (ancestor != null && child != null)
     {
       for (EditPart editPart = child; editPart != null; editPart = editPart.getParent())
       {
         if (editPart == ancestor)
         {
           result = true;
           break;
         }
       }
     }
     return result;
   }
 }
	/*******************************************************************************
	* Copyright (c) 2001, 2004 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are 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:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.wst.wsdl.ui.internal.graph.editparts;

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

	import org.eclipse.draw2d.ColorConstants;
	import org.eclipse.draw2d.IFigure;
	import org.eclipse.draw2d.Label;
	import org.eclipse.draw2d.MarginBorder;
	import org.eclipse.gef.EditPart;
	import org.eclipse.gef.editparts.AbstractGraphicalEditPart;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.SelectionChangedEvent;
	import org.eclipse.wst.wsdl.Definition;
	import org.eclipse.wst.wsdl.Import;
	import org.eclipse.wst.wsdl.ui.internal.WSDLEditorPlugin;
	import org.eclipse.wst.wsdl.ui.internal.gef.util.figures.RoundedLineBorder;
	import org.eclipse.wst.wsdl.ui.internal.model.WSDLGroupObject;
	import org.eclipse.wst.wsdl.ui.internal.util.OpenOnSelectionHelper;

	import org.eclipse.wst.xsd.ui.internal.gef.util.figures.ContainerFigure;
	import org.eclipse.wst.xsd.ui.internal.gef.util.figures.ContainerLayout;
	import org.eclipse.wst.xsd.ui.internal.gef.util.figures.FillLayout;

	public class DefinitionEditPart extends WSDLEditPart implements ISelectionChangedListener //, ModelAdapterListener
	{
	protected Label label;
	protected ContainerFigure outlined;

	protected ContainerFigure rightContentPane;
	protected ContainerFigure topContentPane;
	protected ContainerFigure middleContentPane;
	protected ContainerFigure bottomContentPane;
	protected static final String SELECTED_EDIT_PART_REFERENCE = "SELECTED_EDIT_PART_REFERENCE";

	public void activate()
	{
	super.activate();
	getViewer().addSelectionChangedListener(this);
	}
	/**
	* Apart from the deactivation done in super, the source
	* and target connections are deactivated, and the visual
	* part of the this is removed.
	*
	* @see #activate()
	*/
	public void deactivate()
	{
	getViewer().removeSelectionChangedListener(this);
	super.deactivate();
	}

	protected IFigure[] initContentPanes()
	{
	IFigure[] contentPanes = new IFigure[4];
	contentPanes[0] = rightContentPane;
	contentPanes[1] = topContentPane;
	contentPanes[2] = middleContentPane;
	contentPanes[3] = bottomContentPane;
	return contentPanes;
	}

	protected int getContentPane(Object model)
	{
	int result = 0;

	if (model == SELECTED_EDIT_PART_REFERENCE)
	{
	result = 0;
	}
	else if (model instanceof WSDLGroupObject)
	{
	WSDLGroupObject groupObject = (WSDLGroupObject)model;
	switch (groupObject.getType())
	{
	case WSDLGroupObject.IMPORTS_GROUP :
	case WSDLGroupObject.TYPES_GROUP :
	//case WSDLGroupObject.EXTENSIBILITY_ELEMENTS_GROUP :
	{
	result = 1;
	break;
	}
	case WSDLGroupObject.BINDINGS_GROUP :
	case WSDLGroupObject.MESSAGES_GROUP :
	case WSDLGroupObject.PORT_TYPES_GROUP :
	case WSDLGroupObject.SERVICES_GROUP :
	{
	result = 2;
	break;
	}
	case WSDLGroupObject.EXTENSIBILITY_ELEMENTS_GROUP :
	{
	result = 3;
	break;
	}
	}
	}
	return result;
	}

	protected EditPart createChild(Object model)
	{
	EditPart editPart = null;
	if (model == SELECTED_EDIT_PART_REFERENCE)
	{
	editPart = new PartReferenceSectionEditPart();
	editPart.setModel(model);
	editPart.setParent(this);
	}
	else
	{
	editPart = super.createChild(model);
	}
	return editPart;
	}

	protected IFigure createFigure()
	{
	ContainerFigure outer = new ContainerFigure();
	ContainerLayout anchoredLayout = new ContainerLayout()
	{
	protected int alignFigure(IFigure parent, IFigure child)
	{
	return (child == outlined) ? 0 : -1;
	}
	};
	outer.setLayoutManager(anchoredLayout);
	/*
	ContainerFigure outer = new ConnectedEditPartFigure(this)
	{
	public IFigure getConnectionFigure()
	{
	return selectedPartEditPart != null ? selectedPartEditPart.getFigure() : this;
	}
	};*/
	outer.getContainerLayout().setHorizontal(true);
	//outer.setBorder(new MarginBorder(0, 20, 0, 0));

	outlined = new ContainerFigure();
	outer.add(outlined);
	//outlined.getContainerLayout().setHorizontal(false);
	outlined.setLayoutManager(new FillLayout());
	outlined.setBorder(new RoundedLineBorder(1, 6));
	outlined.setForegroundColor(groupBorderColor);

	ContainerFigure rightPane = new ContainerFigure();
	rightPane.setBorder(new MarginBorder(0, 0, 0, 300));
	rightPane.getContainerLayout().setHorizontal(false);
	outer.add(rightPane);

	//RectangleFigure spacer = new RectangleFigure();
	//rightPane.add(spacer);
	//spacer.setPreferredSize(new Dimension(450, 200));

	rightContentPane = new ContainerFigure();
	rightPane.add(rightContentPane);
	rightContentPane.setBorder(new MarginBorder(15, 20, 15, 15));

	ContainerFigure labelHolder = new ContainerFigure();
	outlined.add(labelHolder);

	label = new Label();
	labelHolder.add(label);
	label.setBorder(new MarginBorder(2, 5, 0, 5));
	label.setFont(mediumFont);
	label.setText(WSDLEditorPlugin.getWSDLString("_UI_LABEL_DEFINITION"));
	label.setForegroundColor(ColorConstants.black);

	topContentPane = new ContainerFigure();
	outlined.add(topContentPane);

	FillLayout fillLayout = new FillLayout(15);
	fillLayout.setHorizontal(true);
	topContentPane.setLayoutManager(fillLayout);
	topContentPane.setBorder(new MarginBorder(10, 10, 10, 10));

	middleContentPane = new ContainerFigure();
	outlined.add(middleContentPane);
	fillLayout = new FillLayout(15);
	fillLayout.setHorizontal(true);
	middleContentPane.setLayoutManager(fillLayout);
	middleContentPane.setBorder(new MarginBorder(0, 10, 10, 10));

	bottomContentPane = new ContainerFigure();
	outlined.add(bottomContentPane);
	bottomContentPane.setLayoutManager(new FillLayout());
	bottomContentPane.setBorder(new MarginBorder(0, 10, 10, 10));

	return outer;
	}

	//public IFigure getContentPane()
	//{
	// return contentPane;
	//}
	public PartReferenceSectionEditPart getPartReferenceSectionEditPart()
	{
	PartReferenceSectionEditPart result = null;
	for (Iterator i = getChildren().iterator(); i.hasNext();)
	{
	EditPart editPart = (EditPart)i.next();
	if (editPart.getModel() == SELECTED_EDIT_PART_REFERENCE)
	{
	result = (PartReferenceSectionEditPart)editPart;
	break;
	}
	}
	return result;
	}

	public GroupEditPart getGroupEditPart(int type)
	{
	GroupEditPart result = null;
	for (Iterator i = getChildren().iterator(); i.hasNext();)
	{
	Object o = i.next();
	if (o instanceof GroupEditPart)
	{
	GroupEditPart groupEditPart = (GroupEditPart)o;
	if (groupEditPart.getType() == type)
	{
	result = groupEditPart;
	break;
	}
	}
	}
	return result;
	}

	public List getModelChildren()
	{
	List list = new ArrayList();
	list.add(SELECTED_EDIT_PART_REFERENCE);
	list.addAll(super.getModelChildren());
	return list;
	}

	public void handleOpenRequest(EditPart editPart)
	{
	GroupEditPart groupEditPart = null;
	if (editPart.getModel() instanceof Import)
	{
	Import theImport = (Import)editPart.getModel();
	Definition definition = (Definition)getModel();
	OpenOnSelectionHelper helper = new OpenOnSelectionHelper(definition);
	helper.openEditor(theImport);
	}
	else
	{
	for (EditPart parent = (EditPart)editPart.getParent(); parent != null; parent = parent.getParent())
	{
	if (parent instanceof GroupEditPart)
	{
	groupEditPart = (GroupEditPart)parent;
	break;
	}
	}

	if (groupEditPart != null)
	{
	GroupEditPart nextGroupEditPart = groupEditPart.getNext();
	if (nextGroupEditPart != null)
	{
	if (nextGroupEditPart.inputConnection instanceof TreeNodeEditPart)
	{
	((TreeNodeEditPart) (nextGroupEditPart.inputConnection)).setExpanded(true);
	}
	}
	GroupEditPart prevGroupEditPart = groupEditPart.getPrevious();
	if (prevGroupEditPart != null)
	{
	if (prevGroupEditPart.outputConnection instanceof TreeNodeEditPart)
	{
	((TreeNodeEditPart) (prevGroupEditPart.outputConnection)).setExpanded(true);
	}
	}
	}
	updateConnections();
	}
	}

	public void selectionChanged(SelectionChangedEvent event)
	{
	updateConnections();
	}

	public void updateConnections()
	{
	// todo
	if (isActive())
	{
	try
	{
	final AbstractGraphicalEditPart selectedEditPart = getSelectedEditPart(getViewer().getSelection());
	GroupEditPart group = getContainingGroup(selectedEditPart);
	if (group != null && group.getConnectionManager() != null)
	{
	group.getConnectionManager().setSelectedModelObject(selectedEditPart.getModel());
	}
	else if (!isAncestor(getPartReferenceSectionEditPart(), selectedEditPart))
	{
	group = getGroupEditPart(WSDLGroupObject.PORT_TYPES_GROUP);
	group.getConnectionManager().setSelectedModelObject(null);
	}
	}
	catch (Exception e)
	{
	e.printStackTrace();
	}
	}
	}

	public GroupEditPart getContainingGroup(AbstractGraphicalEditPart editPart)
	{
	GroupEditPart result = null;
	for (EditPart parent = editPart.getParent(); parent != null; parent = parent.getParent())
	{
	if (parent instanceof GroupEditPart)
	{
	result = (GroupEditPart)parent;
	break;
	}
	}
	return result;
	}

	public GroupEditPart getNextGroupEditPart(GroupEditPart groupEditPart)
	{
	GroupEditPart result = null;
	GroupEditPart prev = null;
	for (Iterator i = getChildren().iterator(); i.hasNext();)
	{
	Object o = i.next();
	if (o instanceof GroupEditPart)
	{
	GroupEditPart editPart = (GroupEditPart)o;
	if (prev == groupEditPart)
	{
	result = editPart;
	break;
	}
	prev = editPart;
	}
	}
	return result;
	}

	public GroupEditPart getPreviousGroupEditPart(GroupEditPart groupEditPart)
	{
	GroupEditPart prev = null;
	for (Iterator i = getChildren().iterator(); i.hasNext();)
	{
	Object o = i.next();
	if (o instanceof GroupEditPart)
	{
	GroupEditPart editPart = (GroupEditPart)o;
	if (editPart == groupEditPart)
	{
	break;
	}
	prev = editPart;
	}
	}
	return prev;
	}

	protected AbstractGraphicalEditPart getSelectedEditPart(ISelection selection)
	{
	AbstractGraphicalEditPart editPart = null;
	if (selection instanceof IStructuredSelection)
	{
	IStructuredSelection s = (IStructuredSelection)selection;
	Object first = s.getFirstElement();
	if (first instanceof AbstractGraphicalEditPart)
	{
	editPart = (AbstractGraphicalEditPart)first;
	}
	}
	return editPart;
	}

	public void refreshChildren()
	{
	super.refreshChildren();
	updateConnections();
	}

	public boolean isAncestor(EditPart ancestor, EditPart child)
	{
	boolean result = false;
	if (ancestor != null && child != null)
	{
	for (EditPart editPart = child; editPart != null; editPart = editPart.getParent())
	{
	if (editPart == ancestor)
	{
	result = true;
	break;
	}
	}
	}
	return result;
	}
	}