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/*******************************************************************************
* Copyright (c) 2001, 2006 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.asd.design;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.ui.parts.ScrollingGraphicalViewer;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.IEditorPart;
import org.eclipse.wst.wsdl.ui.internal.asd.ASDSelectionManager;
public class DesignViewGraphicalViewer extends ScrollingGraphicalViewer implements ISelectionChangedListener
{
protected ASDSelectionChangedListener internalSelectionProvider = new ASDSelectionChangedListener();
public DesignViewGraphicalViewer(IEditorPart editor, ASDSelectionManager manager)
{
super();
setContextMenu(new DesignViewContextMenuProvider(this, this));
editor.getEditorSite().registerContextMenu("org.eclipse.wst.wsdl.editor.popup.graph", getContextMenu(), internalSelectionProvider, false); //$NON-NLS-1$
// make the internalSelectionProvider listen to graph view selection changes
addSelectionChangedListener(internalSelectionProvider);
internalSelectionProvider.addSelectionChangedListener(manager);
manager.addSelectionChangedListener(this);
}
// this method is called when something changes in the selection manager
// (e.g. a selection occured from another view)
public void selectionChanged(SelectionChangedEvent event)
{
Object selectedObject = ((StructuredSelection) event.getSelection()).getFirstElement();
if (event.getSource() != internalSelectionProvider)
{
EditPart editPart = getEditPart(getRootEditPart(), selectedObject);
if (editPart != null)
{
setSelection(new StructuredSelection(editPart));
}
}
}
protected EditPart getEditPart(EditPart editPart, Object model)
{
EditPart result = null;
if (editPart.getModel() == model)
{
result = editPart;
}
else
{
for (Iterator i = editPart.getChildren().iterator(); i.hasNext(); )
{
result = getEditPart((EditPart)i.next(), model);
if (result != null)
{
break;
}
}
}
return result;
}
/*
* We need to convert from edit part selections to model object selections
*/
class ASDSelectionChangedListener implements ISelectionProvider, ISelectionChangedListener
{
protected List listenerList = new ArrayList();
protected ISelection selection = new StructuredSelection();
public void addSelectionChangedListener(ISelectionChangedListener listener)
{
listenerList.add(listener);
}
public void removeSelectionChangedListener(ISelectionChangedListener listener)
{
listenerList.remove(listener);
}
public ISelection getSelection()
{
return selection;
}
protected void notifyListeners(SelectionChangedEvent event)
{
for (Iterator i = listenerList.iterator(); i.hasNext();)
{
ISelectionChangedListener listener = (ISelectionChangedListener) i.next();
listener.selectionChanged(event);
}
}
public StructuredSelection convertSelectionFromEditPartToModel(ISelection editPartSelection)
{
List selectedModelObjectList = new ArrayList();
if (editPartSelection instanceof IStructuredSelection)
{
for (Iterator i = ((IStructuredSelection) editPartSelection).iterator(); i.hasNext();)
{
Object obj = i.next();
Object model = null;
if (obj instanceof EditPart)
{
EditPart editPart = (EditPart) obj;
model = editPart.getModel();
}
if (model != null)
{
selectedModelObjectList.add(model);
}
}
}
return new StructuredSelection(selectedModelObjectList);
}
public void setSelection(ISelection selection)
{
this.selection = selection;
}
public void selectionChanged(SelectionChangedEvent event)
{
ISelection newSelection = convertSelectionFromEditPartToModel(event.getSelection());
this.selection = newSelection;
SelectionChangedEvent newEvent = new SelectionChangedEvent(this, newSelection);
notifyListeners(newEvent);
}
}
}
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