org.eclipse.modisco.facet.widgets.celleditors/src/org/eclipse/modisco/facet/widgets/celleditors/internal/ui/NaryReferenceEditingDialog.java - modisco/org.eclipse.modisco - Git at Google

 /*******************************************************************************
  * Copyright (c) 2010, 2019 CEA LIST.
  *
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v2.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v20.html
  *
  * Contributors:
  *   Nicolas Bros (Mia-Software) - initial API and implementation
  *   Nicolas Guyomar (Mia-Software) - Bug 339554 - org.eclipse.modisco.facet.widgets.celleditors API cleaning
  *   Nicolas Guyomar (Mia-Software) - Bug 342451 - To be able to edit derived facet attributes and derived facet references in a table
  *   Gregoire Dupe (Mia-Software) - Bug 369987 - [Restructuring][Table] Switch to the new customization and facet framework
  *******************************************************************************/
 package org.eclipse.modisco.facet.widgets.celleditors.internal.ui;

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

 import org.eclipse.emf.ecore.EClass;
 import org.eclipse.emf.ecore.EClassifier;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.emf.ecore.EReference;
 import org.eclipse.emf.ecore.EStructuralFeature;
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.dialogs.MessageDialog;
 import org.eclipse.jface.viewers.IOpenListener;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.ListViewer;
 import org.eclipse.jface.viewers.OpenEvent;
 import org.eclipse.jface.viewers.TreeViewer;
 import org.eclipse.modisco.facet.efacet.metamodel.v0_2_0.efacet.FacetReference;
 import org.eclipse.modisco.facet.util.emf.ui.internal.dialogs.CreateInstanceDialog;
 import org.eclipse.modisco.facet.widgets.celleditors.IModelCellEditHandler;
 import org.eclipse.modisco.facet.widgets.celleditors.internal.Messages;
 import org.eclipse.modisco.facet.widgets.internal.CustomizableLabelProvider;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.swt.widgets.Tree;
 import org.eclipse.ui.dialogs.PatternFilter;

 /** A dialog to edit a multiplicity-many {@link EReference} */
 public class NaryReferenceEditingDialog<T extends EObject> extends AbstractNaryEditingDialog<T> {


 	private Button addButton;
 	private Button removeButton;
 	private Button addAllButton;
 	private Button removeAllButton;
 	private Button upButton;
 	private Button downButton;

 	private static final int NUM_COLUMNS = 4;
 	// this is a *tree* viewer because PatternFilter only supports Trees
 	private TreeViewer availableValuesTreeViewer;
 	private ListViewer featureValuesListViewer;
 	private Button createInstanceButton;

 	private AssignableValuesContentProvider assignableValuesContentProvider;
 	private final List<T> availableValues;


 	/**
 	 *
 	 * @param parent
 	 *              the parent {@link Shell}
 	 * @param values
 	 * 				the list of current values.
 	 * @param feature
 	 *            the feature to edit
 	 * @param eObject
 	 * 				the eObject being currently edited. Should not be modified in this dialog.
 	 * @param editHandler
 	 *  			The editHandler which has to be called when the edition is completed
 	 */
 	public NaryReferenceEditingDialog(final Shell shell, final List<T> values,
 			final List<T> availableValues, final IModelCellEditHandler editHandler,
 			final EObject eObject, final EStructuralFeature feature) {
 		super(shell, values, editHandler, eObject, feature);
 		this.availableValues = new ArrayList<T>(availableValues);
 	}

 	@Override
 	protected void configureShell(final Shell shell) {
 		super.configureShell(shell);
 		shell.setText(NLS.bind(Messages.NaryReferenceEditingDialog_shellTitle,
 				getFeature().getName(), geteObject().eClass().getName()));
 	}

 	@Override
 	protected Control createDialogArea(final Composite parent) {
 		final Composite contents = (Composite) super.createDialogArea(parent);

 		final GridLayout contentsGridLayout = (GridLayout) contents.getLayout();
 		contentsGridLayout.numColumns = NaryReferenceEditingDialog.NUM_COLUMNS;

 		final GridData contentsGridData = (GridData) contents.getLayoutData();
 		contentsGridData.horizontalAlignment = SWT.FILL;
 		contentsGridData.verticalAlignment = SWT.FILL;

 		createLeftPane(contents);
 		createMiddleButtonsPane(contents);
 		createRightPane(contents);
 		createRightButtonsPane(contents);

 		this.availableValuesTreeViewer.addOpenListener(new IOpenListener() {
 			public void open(final OpenEvent event) {
 				if (NaryReferenceEditingDialog.this.addButton.isEnabled()) {
 					NaryReferenceEditingDialog.this.addButton.notifyListeners(SWT.Selection, null);
 				}
 			}
 		});

 		this.featureValuesListViewer.addOpenListener(new IOpenListener() {
 			public void open(final OpenEvent event) {
 				if (NaryReferenceEditingDialog.this.removeButton.isEnabled()) {
 					NaryReferenceEditingDialog.this.removeButton.notifyListeners(SWT.Selection,
 							null);
 				}
 			}
 		});

 		this.upButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(final SelectionEvent event) {
 				upButtonClicked();
 			}
 		});

 		this.downButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(final SelectionEvent event) {
 				downButtonClicked();
 			}
 		});

 		this.addButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(final SelectionEvent event) {
 				addButtonClicked();
 			}
 		});

 		this.addAllButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(final SelectionEvent event) {
 				addAllButtonClicked();
 			}
 		});

 		this.removeButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(final SelectionEvent event) {
 				removeButtonClicked();
 			}
 		});

 		this.removeAllButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(final SelectionEvent event) {
 				removeAllButtonClicked();
 			}
 		});

 		if (this.createInstanceButton != null) {
 			this.createInstanceButton.addSelectionListener(new SelectionAdapter() {
 				@Override
 				public void widgetSelected(final SelectionEvent event) {
 					createInstanceButtonClicked();
 				}
 			});
 		}

 		return contents;
 	}

 	private void addButtonClicked() {
 		final IStructuredSelection selection = (IStructuredSelection) this.availableValuesTreeViewer
 				.getSelection();
 		if (selection.isEmpty() || !confirmMove()) {
 			return;
 		}
 		Iterator<T> it = getTCastedStructuredSelectionIterator(selection);
 		while (it.hasNext()) {
 			T element = it.next();
 			if (!(getValues() != null && getValues().contains(element))) {
 				getValues().add(element);
 				this.availableValues.remove(element);
 			}
 		}
 		refresh();
 		this.featureValuesListViewer.setSelection(selection);
 	}

 	@SuppressWarnings({ "unchecked", "static-method" })
 	//unchecked: the selection in not type parameterized, then we cannot get a cleaned cast iterator
 	//static-method: this method cannot be static to be able to use the T type.
 	private Iterator<T> getTCastedStructuredSelectionIterator(final IStructuredSelection selection) {
 		return selection.iterator();
 	}

 	private void addAllButtonClicked() {
 		if (this.availableValues.isEmpty() || !confirmMove()) {
 			return;
 		}
 		getValues().addAll(this.availableValues);
 		this.availableValues.removeAll(getValues());
 		refresh();
 	}

 	private void removeButtonClicked() {
 		final IStructuredSelection selection = (IStructuredSelection) this.featureValuesListViewer
 				.getSelection();
 		if (selection.isEmpty() || !confirmRemove()) {
 			return;
 		}

 		Iterator<T> it = this.getTCastedStructuredSelectionIterator(selection);
 		while (it.hasNext()) {
 			T element = it.next();
 			if (getValues().contains(element)) {
 				this.availableValues.add(element);
 				getValues().remove(element);
 			}
 		}
 		refresh();
 	}

 	private void removeAllButtonClicked() {
 		if (getValues().isEmpty() || !confirmRemove()) {
 			return;
 		}
 		this.availableValues.addAll(getValues());
 		getValues().removeAll(getValues());
 		refresh();
 	}

 	private boolean confirmRemove() {
 		if (getFeature() instanceof EReference) {
 			EReference eReference = (EReference) getFeature();
 			if (eReference.isContainment()) {
 				return MessageDialog.openConfirm(getShell(),
 						Messages.NaryReferenceEditingDialog_deleteElements,
 						Messages.NaryReferenceEditingDialog_deleteElementsLong);
 			}
 		}
 		return true;
 	}

 	private boolean confirmMove() {
 		if (getFeature() instanceof EReference || getFeature() instanceof FacetReference) {
 			EReference reference = (EReference) getFeature();
 			if (reference.isContainment()) {
 				String fullMessage = Messages.NaryReferenceEditingDialog_moveWarning;
 				return MessageDialog.openConfirm(getShell(),
 						Messages.NaryReferenceEditingDialog_moveElement, fullMessage);
 			}
 		}
 		return true;
 	}

 	@SuppressWarnings("unchecked") // type erasure on generic
 	private void createInstanceButtonClicked() {
 		EClassifier eType = getFeature().getEType();
 		if (eType instanceof EClass) {
 			EClass eClass = (EClass) eType;
 			EObject newInstance = CreateInstanceDialog.open(getShell(), eClass,
 					new CustomizableLabelProvider());
 			if (newInstance != null) {
 				getValues().add((T) newInstance);
 				refresh();
 			}
 		}
 	}

 	private void createLeftPane(final Composite contents) {
 		final Composite choiceComposite = new Composite(contents, SWT.NONE);
 		final GridData data = new GridData(SWT.FILL, SWT.FILL, true, true);
 		data.horizontalAlignment = SWT.END;
 		choiceComposite.setLayoutData(data);

 		final GridLayout layout = new GridLayout();
 		data.horizontalAlignment = SWT.FILL;
 		layout.marginHeight = 0;
 		layout.marginWidth = 0;
 		layout.numColumns = 1;
 		choiceComposite.setLayout(layout);

 		final Label choiceLabel = new Label(choiceComposite, SWT.NONE);
 		choiceLabel.setText(Messages.NaryReferenceEditingDialog_availableValues);

 		final GridData choiceLabelGridData = new GridData();
 		choiceLabelGridData.verticalAlignment = SWT.FILL;
 		choiceLabelGridData.horizontalAlignment = SWT.FILL;
 		choiceLabel.setLayoutData(choiceLabelGridData);

 		final Text patternText = createFilterText(choiceComposite);

 		final Tree availableValuesTree = new Tree(choiceComposite, SWT.MULTI | SWT.BORDER);
 		final GridData availableValuesGridData = new GridData();
 		availableValuesGridData.widthHint = AbstractNaryEditingDialog.AVAILABLE_VALUES_TREE_WIDTH;
 		availableValuesGridData.heightHint = AbstractNaryEditingDialog.AVAILABLE_VALUES_TREE_HEIGHT;
 		availableValuesGridData.horizontalAlignment = SWT.FILL;
 		availableValuesGridData.verticalAlignment = SWT.FILL;
 		availableValuesGridData.grabExcessHorizontalSpace = true;
 		availableValuesGridData.grabExcessVerticalSpace = true;
 		availableValuesTree.setLayoutData(availableValuesGridData);

 		this.availableValuesTreeViewer = new TreeViewer(availableValuesTree);
 		this.assignableValuesContentProvider = new AssignableValuesContentProvider();
 		this.availableValuesTreeViewer.setContentProvider(this.assignableValuesContentProvider);
 		this.availableValuesTreeViewer.setLabelProvider(new CustomizableLabelProvider());
 		final PatternFilter filter = new PatternFilter();
 		this.availableValuesTreeViewer.addFilter(filter);

 		this.availableValuesTreeViewer.setInput(this.availableValues);

 		patternText.addModifyListener(new ModifyListener() {
 			public void modifyText(final ModifyEvent e) {
 				filter.setPattern(patternText.getText());
 				NaryReferenceEditingDialog.this.availableValuesTreeViewer.refresh();
 			}
 		});
 	}

 	private void createMiddleButtonsPane(final Composite contents) {
 		final Composite buttonsComposite = new Composite(contents, SWT.NONE);
 		final GridData buttonsCompositeGridData = new GridData();
 		buttonsCompositeGridData.verticalAlignment = SWT.CENTER;
 		buttonsCompositeGridData.horizontalAlignment = SWT.FILL;
 		buttonsComposite.setLayoutData(buttonsCompositeGridData);
 		buttonsComposite.setLayout(new GridLayout());

 		// new Label(buttonsComposite, SWT.NONE);

 		this.addButton = new Button(buttonsComposite, SWT.PUSH);
 		this.addButton.setText(Messages.NaryReferenceEditingDialog_add);
 		this.addButton.setToolTipText(Messages.NaryReferenceEditingDialog_addTooltip);
 		final GridData addButtonGridData = new GridData();
 		addButtonGridData.verticalAlignment = SWT.FILL;
 		addButtonGridData.horizontalAlignment = SWT.FILL;
 		this.addButton.setLayoutData(addButtonGridData);

 		this.removeButton = new Button(buttonsComposite, SWT.PUSH);
 		this.removeButton.setText(Messages.NaryReferenceEditingDialog_remove);
 		this.removeButton.setToolTipText(Messages.NaryReferenceEditingDialog_removeTooltip);
 		final GridData removeButtonGridData = new GridData();
 		removeButtonGridData.verticalAlignment = SWT.FILL;
 		removeButtonGridData.horizontalAlignment = SWT.FILL;
 		this.removeButton.setLayoutData(removeButtonGridData);

 		spacer(buttonsComposite);

 		this.addAllButton = new Button(buttonsComposite, SWT.PUSH);
 		this.addAllButton.setText(Messages.NaryReferenceEditingDialog_addAll);
 		this.addAllButton.setToolTipText(Messages.NaryReferenceEditingDialog_addAllTooltip);

 		this.removeAllButton = new Button(buttonsComposite, SWT.PUSH);
 		this.removeAllButton.setText(Messages.NaryReferenceEditingDialog_removeAll);
 		this.removeAllButton.setToolTipText(Messages.NaryReferenceEditingDialog_removeAllTooltip);
 	}

 	private void spacer(final Composite parent) {
 		@SuppressWarnings("unused")
 		Label label = new Label(parent, SWT.NONE);
 	}

 	private void createRightButtonsPane(final Composite contents) {
 		final Composite buttonsComposite = new Composite(contents, SWT.NONE);
 		final GridData buttonsCompositeGridData = new GridData();
 		buttonsCompositeGridData.verticalAlignment = SWT.FILL;
 		buttonsCompositeGridData.horizontalAlignment = SWT.FILL;
 		buttonsComposite.setLayoutData(buttonsCompositeGridData);
 		buttonsComposite.setLayout(new GridLayout());

 		// spacer
 		spacer(buttonsComposite);

 		if (getFeature() instanceof EReference) {
 			EReference eReference = (EReference) getFeature();
 			if (eReference.isContainment()) {
 				this.createInstanceButton = new Button(buttonsComposite, SWT.PUSH);
 				this.createInstanceButton.setText(Messages.NaryReferenceEditingDialog_newInstance);
 				final GridData createButtonGridData = new GridData();
 				createButtonGridData.verticalAlignment = SWT.FILL;
 				createButtonGridData.horizontalAlignment = SWT.FILL;
 				this.createInstanceButton.setLayoutData(createButtonGridData);
 				spacer(buttonsComposite);
 			}

 		}

 		this.upButton = new Button(buttonsComposite, SWT.PUSH);
 		this.upButton.setText(Messages.NaryReferenceEditingDialog_up);
 		final GridData upButtonGridData = new GridData();
 		upButtonGridData.verticalAlignment = SWT.FILL;
 		upButtonGridData.horizontalAlignment = SWT.FILL;
 		this.upButton.setLayoutData(upButtonGridData);

 		this.downButton = new Button(buttonsComposite, SWT.PUSH);
 		this.downButton.setText(Messages.NaryReferenceEditingDialog_down);
 		final GridData downButtonGridData = new GridData();
 		downButtonGridData.verticalAlignment = SWT.FILL;
 		downButtonGridData.horizontalAlignment = SWT.FILL;
 		this.downButton.setLayoutData(downButtonGridData);
 	}

 	private void createRightPane(final Composite contents) {
 		final Composite featureComposite = new Composite(contents, SWT.NONE);
 		final GridData featureCompositeData = new GridData(SWT.FILL, SWT.FILL, true, true);
 		featureCompositeData.horizontalAlignment = SWT.END;
 		featureComposite.setLayoutData(featureCompositeData);

 		final GridLayout featureCompositeLayout = new GridLayout();
 		featureCompositeData.horizontalAlignment = SWT.FILL;
 		featureCompositeLayout.marginHeight = 0;
 		featureCompositeLayout.marginWidth = 0;
 		featureCompositeLayout.numColumns = 1;
 		featureComposite.setLayout(featureCompositeLayout);

 		final Label featureLabel = new Label(featureComposite, SWT.NONE);
 		featureLabel.setText(Messages.NaryReferenceEditingDialog_values);
 		final GridData valuesLabelGridData = new GridData();
 		valuesLabelGridData.horizontalSpan = 2;
 		valuesLabelGridData.horizontalAlignment = SWT.FILL;
 		valuesLabelGridData.verticalAlignment = SWT.FILL;
 		featureLabel.setLayoutData(valuesLabelGridData);

 		final org.eclipse.swt.widgets.List availableValuesList = new org.eclipse.swt.widgets.List(
 				featureComposite, SWT.MULTI | SWT.BORDER | SWT.V_SCROLL);
 		final GridData availableValuesGridData = new GridData();
 		availableValuesGridData.widthHint = AbstractNaryEditingDialog.AVAILABLE_VALUES_TREE_WIDTH;
 		availableValuesGridData.heightHint = AbstractNaryEditingDialog.AVAILABLE_VALUES_TREE_HEIGHT;
 		availableValuesGridData.verticalAlignment = SWT.FILL;
 		availableValuesGridData.horizontalAlignment = SWT.FILL;
 		availableValuesGridData.grabExcessHorizontalSpace = true;
 		availableValuesGridData.grabExcessVerticalSpace = true;
 		availableValuesList.setLayoutData(availableValuesGridData);

 		this.featureValuesListViewer = new ListViewer(availableValuesList);
 		this.featureValuesListViewer.setContentProvider(new AssignedValuesContentProvider());
 		this.featureValuesListViewer.setLabelProvider(new CustomizableLabelProvider());
 		this.featureValuesListViewer
 				.setInput(getValues());
 	}

 	private Text createFilterText(final Composite contents) {
 		Text patternText = new Text(contents, SWT.BORDER | SWT.SEARCH);
 		patternText.setMessage(Messages.NaryReferenceEditingDialog_typeFilterText);
 		patternText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		return patternText;
 	}

 	@Override
 	public void refresh() {
 		this.availableValuesTreeViewer.refresh();
 		this.featureValuesListViewer.refresh();
 	}

 	@Override
 	protected boolean isResizable() {
 		return true;
 	}

 	@Override
 	protected void createButtonsForButtonBar(final Composite parent) {
 		createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);
 		createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
 	}

 	@Override
 	public ISelection getSelection() {
 		return this.featureValuesListViewer.getSelection();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2010, 2019 CEA LIST.
	*
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v2.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v20.html
	*
	* Contributors:
	* Nicolas Bros (Mia-Software) - initial API and implementation
	* Nicolas Guyomar (Mia-Software) - Bug 339554 - org.eclipse.modisco.facet.widgets.celleditors API cleaning
	* Nicolas Guyomar (Mia-Software) - Bug 342451 - To be able to edit derived facet attributes and derived facet references in a table
	* Gregoire Dupe (Mia-Software) - Bug 369987 - [Restructuring][Table] Switch to the new customization and facet framework
	*******************************************************************************/
	package org.eclipse.modisco.facet.widgets.celleditors.internal.ui;

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

	import org.eclipse.emf.ecore.EClass;
	import org.eclipse.emf.ecore.EClassifier;
	import org.eclipse.emf.ecore.EObject;
	import org.eclipse.emf.ecore.EReference;
	import org.eclipse.emf.ecore.EStructuralFeature;
	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.dialogs.MessageDialog;
	import org.eclipse.jface.viewers.IOpenListener;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.ListViewer;
	import org.eclipse.jface.viewers.OpenEvent;
	import org.eclipse.jface.viewers.TreeViewer;
	import org.eclipse.modisco.facet.efacet.metamodel.v0_2_0.efacet.FacetReference;
	import org.eclipse.modisco.facet.util.emf.ui.internal.dialogs.CreateInstanceDialog;
	import org.eclipse.modisco.facet.widgets.celleditors.IModelCellEditHandler;
	import org.eclipse.modisco.facet.widgets.celleditors.internal.Messages;
	import org.eclipse.modisco.facet.widgets.internal.CustomizableLabelProvider;
	import org.eclipse.osgi.util.NLS;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ModifyEvent;
	import org.eclipse.swt.events.ModifyListener;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.swt.widgets.Tree;
	import org.eclipse.ui.dialogs.PatternFilter;

	/** A dialog to edit a multiplicity-many {@link EReference} */
	public class NaryReferenceEditingDialog<T extends EObject> extends AbstractNaryEditingDialog<T> {


	private Button addButton;
	private Button removeButton;
	private Button addAllButton;
	private Button removeAllButton;
	private Button upButton;
	private Button downButton;

	private static final int NUM_COLUMNS = 4;
	// this is a tree viewer because PatternFilter only supports Trees
	private TreeViewer availableValuesTreeViewer;
	private ListViewer featureValuesListViewer;
	private Button createInstanceButton;

	private AssignableValuesContentProvider assignableValuesContentProvider;
	private final List<T> availableValues;


	/**
	*
	* @param parent
	* the parent {@link Shell}
	* @param values
	* the list of current values.
	* @param feature
	* the feature to edit
	* @param eObject
	* the eObject being currently edited. Should not be modified in this dialog.
	* @param editHandler
	* The editHandler which has to be called when the edition is completed
	*/
	public NaryReferenceEditingDialog(final Shell shell, final List<T> values,
	final List<T> availableValues, final IModelCellEditHandler editHandler,
	final EObject eObject, final EStructuralFeature feature) {
	super(shell, values, editHandler, eObject, feature);
	this.availableValues = new ArrayList<T>(availableValues);
	}

	@Override
	protected void configureShell(final Shell shell) {
	super.configureShell(shell);
	shell.setText(NLS.bind(Messages.NaryReferenceEditingDialog_shellTitle,
	getFeature().getName(), geteObject().eClass().getName()));
	}

	@Override
	protected Control createDialogArea(final Composite parent) {
	final Composite contents = (Composite) super.createDialogArea(parent);

	final GridLayout contentsGridLayout = (GridLayout) contents.getLayout();
	contentsGridLayout.numColumns = NaryReferenceEditingDialog.NUM_COLUMNS;

	final GridData contentsGridData = (GridData) contents.getLayoutData();
	contentsGridData.horizontalAlignment = SWT.FILL;
	contentsGridData.verticalAlignment = SWT.FILL;

	createLeftPane(contents);
	createMiddleButtonsPane(contents);
	createRightPane(contents);
	createRightButtonsPane(contents);

	this.availableValuesTreeViewer.addOpenListener(new IOpenListener() {
	public void open(final OpenEvent event) {
	if (NaryReferenceEditingDialog.this.addButton.isEnabled()) {
	NaryReferenceEditingDialog.this.addButton.notifyListeners(SWT.Selection, null);
	}
	}
	});

	this.featureValuesListViewer.addOpenListener(new IOpenListener() {
	public void open(final OpenEvent event) {
	if (NaryReferenceEditingDialog.this.removeButton.isEnabled()) {
	NaryReferenceEditingDialog.this.removeButton.notifyListeners(SWT.Selection,
	null);
	}
	}
	});

	this.upButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(final SelectionEvent event) {
	upButtonClicked();
	}
	});

	this.downButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(final SelectionEvent event) {
	downButtonClicked();
	}
	});

	this.addButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(final SelectionEvent event) {
	addButtonClicked();
	}
	});

	this.addAllButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(final SelectionEvent event) {
	addAllButtonClicked();
	}
	});

	this.removeButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(final SelectionEvent event) {
	removeButtonClicked();
	}
	});

	this.removeAllButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(final SelectionEvent event) {
	removeAllButtonClicked();
	}
	});

	if (this.createInstanceButton != null) {
	this.createInstanceButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(final SelectionEvent event) {
	createInstanceButtonClicked();
	}
	});
	}

	return contents;
	}

	private void addButtonClicked() {
	final IStructuredSelection selection = (IStructuredSelection) this.availableValuesTreeViewer
	.getSelection();
	if (selection.isEmpty() \|\| !confirmMove()) {
	return;
	}
	Iterator<T> it = getTCastedStructuredSelectionIterator(selection);
	while (it.hasNext()) {
	T element = it.next();
	if (!(getValues() != null && getValues().contains(element))) {
	getValues().add(element);
	this.availableValues.remove(element);
	}
	}
	refresh();
	this.featureValuesListViewer.setSelection(selection);
	}

	@SuppressWarnings({ "unchecked", "static-method" })
	//unchecked: the selection in not type parameterized, then we cannot get a cleaned cast iterator
	//static-method: this method cannot be static to be able to use the T type.
	private Iterator<T> getTCastedStructuredSelectionIterator(final IStructuredSelection selection) {
	return selection.iterator();
	}

	private void addAllButtonClicked() {
	if (this.availableValues.isEmpty() \|\| !confirmMove()) {
	return;
	}
	getValues().addAll(this.availableValues);
	this.availableValues.removeAll(getValues());
	refresh();
	}

	private void removeButtonClicked() {
	final IStructuredSelection selection = (IStructuredSelection) this.featureValuesListViewer
	.getSelection();
	if (selection.isEmpty() \|\| !confirmRemove()) {
	return;
	}

	Iterator<T> it = this.getTCastedStructuredSelectionIterator(selection);
	while (it.hasNext()) {
	T element = it.next();
	if (getValues().contains(element)) {
	this.availableValues.add(element);
	getValues().remove(element);
	}
	}
	refresh();
	}

	private void removeAllButtonClicked() {
	if (getValues().isEmpty() \|\| !confirmRemove()) {
	return;
	}
	this.availableValues.addAll(getValues());
	getValues().removeAll(getValues());
	refresh();
	}

	private boolean confirmRemove() {
	if (getFeature() instanceof EReference) {
	EReference eReference = (EReference) getFeature();
	if (eReference.isContainment()) {
	return MessageDialog.openConfirm(getShell(),
	Messages.NaryReferenceEditingDialog_deleteElements,
	Messages.NaryReferenceEditingDialog_deleteElementsLong);
	}
	}
	return true;
	}

	private boolean confirmMove() {
	if (getFeature() instanceof EReference \|\| getFeature() instanceof FacetReference) {
	EReference reference = (EReference) getFeature();
	if (reference.isContainment()) {
	String fullMessage = Messages.NaryReferenceEditingDialog_moveWarning;
	return MessageDialog.openConfirm(getShell(),
	Messages.NaryReferenceEditingDialog_moveElement, fullMessage);
	}
	}
	return true;
	}

	@SuppressWarnings("unchecked") // type erasure on generic
	private void createInstanceButtonClicked() {
	EClassifier eType = getFeature().getEType();
	if (eType instanceof EClass) {
	EClass eClass = (EClass) eType;
	EObject newInstance = CreateInstanceDialog.open(getShell(), eClass,
	new CustomizableLabelProvider());
	if (newInstance != null) {
	getValues().add((T) newInstance);
	refresh();
	}
	}
	}

	private void createLeftPane(final Composite contents) {
	final Composite choiceComposite = new Composite(contents, SWT.NONE);
	final GridData data = new GridData(SWT.FILL, SWT.FILL, true, true);
	data.horizontalAlignment = SWT.END;
	choiceComposite.setLayoutData(data);

	final GridLayout layout = new GridLayout();
	data.horizontalAlignment = SWT.FILL;
	layout.marginHeight = 0;
	layout.marginWidth = 0;
	layout.numColumns = 1;
	choiceComposite.setLayout(layout);

	final Label choiceLabel = new Label(choiceComposite, SWT.NONE);
	choiceLabel.setText(Messages.NaryReferenceEditingDialog_availableValues);

	final GridData choiceLabelGridData = new GridData();
	choiceLabelGridData.verticalAlignment = SWT.FILL;
	choiceLabelGridData.horizontalAlignment = SWT.FILL;
	choiceLabel.setLayoutData(choiceLabelGridData);

	final Text patternText = createFilterText(choiceComposite);

	final Tree availableValuesTree = new Tree(choiceComposite, SWT.MULTI \| SWT.BORDER);
	final GridData availableValuesGridData = new GridData();
	availableValuesGridData.widthHint = AbstractNaryEditingDialog.AVAILABLE_VALUES_TREE_WIDTH;
	availableValuesGridData.heightHint = AbstractNaryEditingDialog.AVAILABLE_VALUES_TREE_HEIGHT;
	availableValuesGridData.horizontalAlignment = SWT.FILL;
	availableValuesGridData.verticalAlignment = SWT.FILL;
	availableValuesGridData.grabExcessHorizontalSpace = true;
	availableValuesGridData.grabExcessVerticalSpace = true;
	availableValuesTree.setLayoutData(availableValuesGridData);

	this.availableValuesTreeViewer = new TreeViewer(availableValuesTree);
	this.assignableValuesContentProvider = new AssignableValuesContentProvider();
	this.availableValuesTreeViewer.setContentProvider(this.assignableValuesContentProvider);
	this.availableValuesTreeViewer.setLabelProvider(new CustomizableLabelProvider());
	final PatternFilter filter = new PatternFilter();
	this.availableValuesTreeViewer.addFilter(filter);

	this.availableValuesTreeViewer.setInput(this.availableValues);

	patternText.addModifyListener(new ModifyListener() {
	public void modifyText(final ModifyEvent e) {
	filter.setPattern(patternText.getText());
	NaryReferenceEditingDialog.this.availableValuesTreeViewer.refresh();
	}
	});
	}

	private void createMiddleButtonsPane(final Composite contents) {
	final Composite buttonsComposite = new Composite(contents, SWT.NONE);
	final GridData buttonsCompositeGridData = new GridData();
	buttonsCompositeGridData.verticalAlignment = SWT.CENTER;
	buttonsCompositeGridData.horizontalAlignment = SWT.FILL;
	buttonsComposite.setLayoutData(buttonsCompositeGridData);
	buttonsComposite.setLayout(new GridLayout());

	// new Label(buttonsComposite, SWT.NONE);

	this.addButton = new Button(buttonsComposite, SWT.PUSH);
	this.addButton.setText(Messages.NaryReferenceEditingDialog_add);
	this.addButton.setToolTipText(Messages.NaryReferenceEditingDialog_addTooltip);
	final GridData addButtonGridData = new GridData();
	addButtonGridData.verticalAlignment = SWT.FILL;
	addButtonGridData.horizontalAlignment = SWT.FILL;
	this.addButton.setLayoutData(addButtonGridData);

	this.removeButton = new Button(buttonsComposite, SWT.PUSH);
	this.removeButton.setText(Messages.NaryReferenceEditingDialog_remove);
	this.removeButton.setToolTipText(Messages.NaryReferenceEditingDialog_removeTooltip);
	final GridData removeButtonGridData = new GridData();
	removeButtonGridData.verticalAlignment = SWT.FILL;
	removeButtonGridData.horizontalAlignment = SWT.FILL;
	this.removeButton.setLayoutData(removeButtonGridData);

	spacer(buttonsComposite);

	this.addAllButton = new Button(buttonsComposite, SWT.PUSH);
	this.addAllButton.setText(Messages.NaryReferenceEditingDialog_addAll);
	this.addAllButton.setToolTipText(Messages.NaryReferenceEditingDialog_addAllTooltip);

	this.removeAllButton = new Button(buttonsComposite, SWT.PUSH);
	this.removeAllButton.setText(Messages.NaryReferenceEditingDialog_removeAll);
	this.removeAllButton.setToolTipText(Messages.NaryReferenceEditingDialog_removeAllTooltip);
	}

	private void spacer(final Composite parent) {
	@SuppressWarnings("unused")
	Label label = new Label(parent, SWT.NONE);
	}

	private void createRightButtonsPane(final Composite contents) {
	final Composite buttonsComposite = new Composite(contents, SWT.NONE);
	final GridData buttonsCompositeGridData = new GridData();
	buttonsCompositeGridData.verticalAlignment = SWT.FILL;
	buttonsCompositeGridData.horizontalAlignment = SWT.FILL;
	buttonsComposite.setLayoutData(buttonsCompositeGridData);
	buttonsComposite.setLayout(new GridLayout());

	// spacer
	spacer(buttonsComposite);

	if (getFeature() instanceof EReference) {
	EReference eReference = (EReference) getFeature();
	if (eReference.isContainment()) {
	this.createInstanceButton = new Button(buttonsComposite, SWT.PUSH);
	this.createInstanceButton.setText(Messages.NaryReferenceEditingDialog_newInstance);
	final GridData createButtonGridData = new GridData();
	createButtonGridData.verticalAlignment = SWT.FILL;
	createButtonGridData.horizontalAlignment = SWT.FILL;
	this.createInstanceButton.setLayoutData(createButtonGridData);
	spacer(buttonsComposite);
	}

	}

	this.upButton = new Button(buttonsComposite, SWT.PUSH);
	this.upButton.setText(Messages.NaryReferenceEditingDialog_up);
	final GridData upButtonGridData = new GridData();
	upButtonGridData.verticalAlignment = SWT.FILL;
	upButtonGridData.horizontalAlignment = SWT.FILL;
	this.upButton.setLayoutData(upButtonGridData);

	this.downButton = new Button(buttonsComposite, SWT.PUSH);
	this.downButton.setText(Messages.NaryReferenceEditingDialog_down);
	final GridData downButtonGridData = new GridData();
	downButtonGridData.verticalAlignment = SWT.FILL;
	downButtonGridData.horizontalAlignment = SWT.FILL;
	this.downButton.setLayoutData(downButtonGridData);
	}

	private void createRightPane(final Composite contents) {
	final Composite featureComposite = new Composite(contents, SWT.NONE);
	final GridData featureCompositeData = new GridData(SWT.FILL, SWT.FILL, true, true);
	featureCompositeData.horizontalAlignment = SWT.END;
	featureComposite.setLayoutData(featureCompositeData);

	final GridLayout featureCompositeLayout = new GridLayout();
	featureCompositeData.horizontalAlignment = SWT.FILL;
	featureCompositeLayout.marginHeight = 0;
	featureCompositeLayout.marginWidth = 0;
	featureCompositeLayout.numColumns = 1;
	featureComposite.setLayout(featureCompositeLayout);

	final Label featureLabel = new Label(featureComposite, SWT.NONE);
	featureLabel.setText(Messages.NaryReferenceEditingDialog_values);
	final GridData valuesLabelGridData = new GridData();
	valuesLabelGridData.horizontalSpan = 2;
	valuesLabelGridData.horizontalAlignment = SWT.FILL;
	valuesLabelGridData.verticalAlignment = SWT.FILL;
	featureLabel.setLayoutData(valuesLabelGridData);

	final org.eclipse.swt.widgets.List availableValuesList = new org.eclipse.swt.widgets.List(
	featureComposite, SWT.MULTI \| SWT.BORDER \| SWT.V_SCROLL);
	final GridData availableValuesGridData = new GridData();
	availableValuesGridData.widthHint = AbstractNaryEditingDialog.AVAILABLE_VALUES_TREE_WIDTH;
	availableValuesGridData.heightHint = AbstractNaryEditingDialog.AVAILABLE_VALUES_TREE_HEIGHT;
	availableValuesGridData.verticalAlignment = SWT.FILL;
	availableValuesGridData.horizontalAlignment = SWT.FILL;
	availableValuesGridData.grabExcessHorizontalSpace = true;
	availableValuesGridData.grabExcessVerticalSpace = true;
	availableValuesList.setLayoutData(availableValuesGridData);

	this.featureValuesListViewer = new ListViewer(availableValuesList);
	this.featureValuesListViewer.setContentProvider(new AssignedValuesContentProvider());
	this.featureValuesListViewer.setLabelProvider(new CustomizableLabelProvider());
	this.featureValuesListViewer
	.setInput(getValues());
	}

	private Text createFilterText(final Composite contents) {
	Text patternText = new Text(contents, SWT.BORDER \| SWT.SEARCH);
	patternText.setMessage(Messages.NaryReferenceEditingDialog_typeFilterText);
	patternText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	return patternText;
	}

	@Override
	public void refresh() {
	this.availableValuesTreeViewer.refresh();
	this.featureValuesListViewer.refresh();
	}

	@Override
	protected boolean isResizable() {
	return true;
	}

	@Override
	protected void createButtonsForButtonBar(final Composite parent) {
	createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);
	createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
	}

	@Override
	public ISelection getSelection() {
	return this.featureValuesListViewer.getSelection();
	}
	}