bundles/org.eclipse.emf.ecp.diffmerge.swt/src/org/eclipse/emf/ecp/diffmerge/swt/DiffDialog.java - emfclient/org.eclipse.emf.ecp.core - Git at Google

 /*******************************************************************************
  * Copyright (c) 2011-2014 EclipseSource Muenchen GmbH and others.
  *
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  * Eugen Neufeld - initial API and implementation
  ******************************************************************************/
 package org.eclipse.emf.ecp.diffmerge.swt;

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

 import org.eclipse.emf.common.command.BasicCommandStack;
 import org.eclipse.emf.common.notify.AdapterFactory;
 import org.eclipse.emf.common.util.URI;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.emf.ecore.resource.Resource;
 import org.eclipse.emf.ecore.resource.ResourceSet;
 import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
 import org.eclipse.emf.ecore.util.EcoreUtil;
 import org.eclipse.emf.ecp.diffmerge.spi.context.DefaultMergeUtil;
 import org.eclipse.emf.ecp.diffmerge.spi.context.DiffMergeModelContext;
 import org.eclipse.emf.ecp.ui.view.ECPRendererException;
 import org.eclipse.emf.ecp.ui.view.swt.ECPSWTViewRenderer;
 import org.eclipse.emf.ecp.view.spi.model.LabelAlignment;
 import org.eclipse.emf.ecp.view.spi.model.VContainedElement;
 import org.eclipse.emf.ecp.view.spi.model.VControl;
 import org.eclipse.emf.ecp.view.spi.model.VElement;
 import org.eclipse.emf.ecp.view.spi.model.VView;
 import org.eclipse.emf.ecp.view.spi.model.VViewFactory;
 import org.eclipse.emf.edit.domain.AdapterFactoryEditingDomain;
 import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
 import org.eclipse.emf.edit.provider.ReflectiveItemProviderAdapterFactory;
 import org.eclipse.emfforms.spi.localization.LocalizationServiceHelper;
 import org.eclipse.jface.layout.GridDataFactory;
 import org.eclipse.jface.layout.GridLayoutFactory;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.ScrolledComposite;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.layout.FillLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Group;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Shell;

 /**
  * Class creating a diff Dialog.
  *
  * @author Eugen Neufeld
  *
  */
 public class DiffDialog {

 	/**
 	 * Variant constant for indicating RAP controls.
 	 */
 	private static final String CUSTOM_VARIANT = "org.eclipse.rap.rwt.customVariant"; //$NON-NLS-1$

 	private final VControl left;
 	private final VControl right;
 	private final VControl main;
 	private final String diffAttribute;
 	private final DiffMergeModelContext viewModelContext;

 	private VControl mergeControl;
 	private EObject mergeDomainObject;
 	private boolean diffConfirmed = true;

 	/**
 	 * Constructor for the diff dialog.
 	 *
 	 * @param viewModelContext the {@link org.eclipse.emf.ecp.view.spi.context.ViewModelContext ViewModelContext}
 	 * @param diffAttribute the display name of the attribute
 	 * @param left the left {@link VControl}
 	 * @param right the right {@link VControl}
 	 * @param main the main {@link VControl}
 	 */
 	public DiffDialog(DiffMergeModelContext viewModelContext, String diffAttribute, VControl left,
 		VControl right, VControl main) {
 		this.viewModelContext = viewModelContext;
 		this.diffAttribute = diffAttribute;
 		this.left = left;
 		this.right = right;
 		this.main = main;
 	}

 	/**
 	 * Creates the dialog content.
 	 *
 	 * @param parent the parent {@link Composite}
 	 */
 	public void create(Composite parent) {
 		final Composite mainComposite = new Composite(parent, SWT.NONE);
 		GridLayoutFactory.fillDefaults().numColumns(1).equalWidth(false).extendedMargins(10, 10, 10, 10)
 			.applyTo(mainComposite);
 		final ScrolledComposite scrolledComposite = new ScrolledComposite(mainComposite, SWT.H_SCROLL
 			| SWT.V_SCROLL);
 		{
 			scrolledComposite.setExpandHorizontal(true);
 			scrolledComposite.setExpandVertical(true);
 			scrolledComposite.setShowFocusedControl(true);
 			GridLayoutFactory.fillDefaults().numColumns(1).equalWidth(false).applyTo(scrolledComposite);
 			GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).grab(true, true).applyTo(scrolledComposite);

 			final Composite composite = new Composite(scrolledComposite, SWT.NONE);
 			GridLayoutFactory.fillDefaults().numColumns(1).equalWidth(false)
 				.applyTo(composite);
 			GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).grab(true, true).applyTo(composite);

 			final Control title = createTitleLabel(composite);
 			GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(title);

 			final Control diff = createDiff(composite);
 			GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(false, false).applyTo(diff);

 			final Control merge = createTarget(composite);
 			GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(false, false).applyTo(merge);

 			scrolledComposite.setContent(composite);
 			composite.layout();
 			final Point point = composite.computeSize(SWT.DEFAULT, SWT.DEFAULT);
 			scrolledComposite.setMinSize(point);
 		}
 		final Control nextPrevious = createButtonRow(mainComposite);
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(true, false).applyTo(nextPrevious);

 	}

 	private Control createButtonRow(Composite parent) {
 		final Composite buttonRowComposite = new Composite(parent, SWT.NONE);
 		buttonRowComposite.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_buttonRow"); //$NON-NLS-1$
 		GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(true).applyTo(buttonRowComposite);

 		{
 			final Composite diffConfirmedComposite = new Composite(buttonRowComposite, SWT.NONE);
 			GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(true, false).span(2, 1)
 				.applyTo(diffConfirmedComposite);
 			diffConfirmedComposite.setLayout(new FillLayout(SWT.HORIZONTAL));
 			final Button buttonDiffConfirmed = new Button(diffConfirmedComposite, SWT.CHECK);
 			buttonDiffConfirmed.setText(LocalizationServiceHelper.getString(DiffDialog.class,
 				MessageKeys.DiffDialog_DiffConfirmed));
 			buttonDiffConfirmed.setSelection(diffConfirmed);
 			buttonDiffConfirmed.addSelectionListener(new SelectionAdapter() {

 				/**
 				 * {@inheritDoc}
 				 *
 				 * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
 				 */
 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					super.widgetSelected(e);
 					diffConfirmed = buttonDiffConfirmed.getSelection();
 				}

 			});
 		}

 		{
 			final int index = viewModelContext.getIndexOf(main);

 			final Composite nextPreviousComposite = new Composite(buttonRowComposite, SWT.NONE);
 			nextPreviousComposite.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_nextPrevious"); //$NON-NLS-1$
 			GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(true).applyTo(nextPreviousComposite);
 			GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.BEGINNING).grab(true, false)
 				.applyTo(nextPreviousComposite);

 			final Button previous = new Button(nextPreviousComposite, SWT.PUSH);
 			previous.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_Previous));
 			previous.setImage(Activator.getImage("icons/arrow_left.png")); //$NON-NLS-1$
 			GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(false, false).applyTo(previous);
 			previous.addSelectionListener(new SelectionAdapter() {

 				/**
 				 * {@inheritDoc}
 				 *
 				 * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
 				 */
 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					super.widgetSelected(e);
 					saveAndCloseDialog(previous.getShell());
 					DiffDialogHelper.showDialog(viewModelContext, index - 1);
 				}

 			});
 			final Button next = new Button(nextPreviousComposite, SWT.PUSH);
 			next.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_Next));
 			next.setImage(Activator.getImage("icons/arrow_right.png")); //$NON-NLS-1$
 			GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(false, false).applyTo(next);
 			next.addSelectionListener(new SelectionAdapter() {

 				/**
 				 * {@inheritDoc}
 				 *
 				 * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
 				 */
 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					super.widgetSelected(e);
 					saveAndCloseDialog(next.getShell());
 					DiffDialogHelper.showDialog(viewModelContext, index + 1);
 				}

 			});

 			if (index == 0) {
 				previous.setEnabled(false);
 			}
 			if (index + 1 == viewModelContext.getTotalNumberOfDiffs()) {
 				next.setEnabled(false);
 			}
 		}

 		{
 			final Button bConfirm = new Button(buttonRowComposite, SWT.PUSH);
 			bConfirm.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_Confirm));
 			bConfirm.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_merge_confirm"); //$NON-NLS-1$
 			GridDataFactory.fillDefaults().align(SWT.END, SWT.BEGINNING).grab(true, false).applyTo(bConfirm);
 			bConfirm.addSelectionListener(new SelectionAdapter() {

 				/**
 				 * {@inheritDoc}
 				 *
 				 * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
 				 */
 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					super.widgetSelected(e);
 					saveAndCloseDialog(bConfirm.getShell());
 				}

 			});
 		}

 		return buttonRowComposite;
 	}

 	/**
 	 * Creates the Merge content.
 	 *
 	 * @param parent the {@link Composite}
 	 * @return the control showing the merge
 	 */
 	private Control createTarget(final Composite parent) {
 		final Group targetGroup = new Group(parent, SWT.NONE);
 		targetGroup.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_target"); //$NON-NLS-1$
 		targetGroup.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_targetObject));
 		GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(false).applyTo(targetGroup);

 		// final Label mainObject = new Label(targetGroup, SWT.NONE);
 		// mainObject.setText(Messages.DiffDialog_targetObject);
 		// mainObject.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_merge_label"); //$NON-NLS-1$
 		// GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.FILL).grab(false, false).applyTo(mainObject);

 		mergeControl = EcoreUtil.copy(main);
 		final ResourceSet resourceSet = new ResourceSetImpl();
 		final AdapterFactoryEditingDomain domain = new AdapterFactoryEditingDomain(
 			new ComposedAdapterFactory(new AdapterFactory[] {
 				new ReflectiveItemProviderAdapterFactory(),
 				new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE) }),
 			new BasicCommandStack(), resourceSet);
 		mergeDomainObject = EcoreUtil.copy(viewModelContext.getDomainModel());
 		resourceSet.eAdapters().add(new AdapterFactoryEditingDomain.EditingDomainProvider(domain));
 		final Resource resource = resourceSet.createResource(URI.createURI("VIRTUAL_URI_TEMP")); //$NON-NLS-1$
 		resource.getContents().add(mergeDomainObject);
 		createControl(targetGroup, mergeControl, mergeDomainObject, false);

 		return targetGroup;
 	}

 	/**
 	 * Creates the Diff content.
 	 *
 	 * @param parent the {@link Composite}
 	 * @return the control showing the diff
 	 */
 	private Control createDiff(final Composite parent) {
 		final Group group = new Group(parent, SWT.NONE);
 		group.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_DifferenceGroup));
 		group.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_diff"); //$NON-NLS-1$
 		GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(false).applyTo(group);

 		final Label leftObject = new Label(group, SWT.NONE);
 		leftObject
 			.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_leftObject + ":")); //$NON-NLS-1$
 		leftObject.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_diff_left"); //$NON-NLS-1$
 		GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.FILL).grab(false, false).span(2, 1).applyTo(leftObject);

 		createControl(group, EcoreUtil.copy(left), EcoreUtil.copy(viewModelContext.getLeftModel()), true);

 		final Button bReplaceWithLeft = new Button(group, SWT.PUSH);
 		bReplaceWithLeft.setText(LocalizationServiceHelper
 			.getString(DiffDialog.class, MessageKeys.DiffDialog_replaceWithLeft));
 		bReplaceWithLeft.setImage(Activator.getImage("icons/arrow_down.png")); //$NON-NLS-1$
 		bReplaceWithLeft.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_diff_leftReplace"); //$NON-NLS-1$
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(false, false).applyTo(bReplaceWithLeft);
 		bReplaceWithLeft.addSelectionListener(new SelectionAdapter() {

 			/**
 			 * {@inheritDoc}
 			 *
 			 * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
 			 */
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				super.widgetSelected(e);
 				replaceMainWith(left, viewModelContext.getLeftModel());
 			}

 		});

 		final Label rightObject = new Label(group, SWT.NONE);
 		rightObject
 			.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_rightObject + ":")); //$NON-NLS-1$
 		rightObject.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_diff_right"); //$NON-NLS-1$
 		GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.FILL).grab(false, false).span(2, 1)
 			.applyTo(rightObject);

 		createControl(group, EcoreUtil.copy(right), EcoreUtil.copy(viewModelContext.getRightModel()), true);

 		final Button bReplaceWithRight = new Button(group, SWT.PUSH);
 		bReplaceWithRight.setText(LocalizationServiceHelper.getString(DiffDialog.class,
 			MessageKeys.DiffDialog_replaceWithRight));
 		bReplaceWithRight.setImage(Activator.getImage("icons/arrow_down.png")); //$NON-NLS-1$
 		bReplaceWithLeft.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_diff_rightReplace"); //$NON-NLS-1$
 		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(false, false).applyTo(bReplaceWithRight);
 		bReplaceWithRight.addSelectionListener(new SelectionAdapter() {

 			/**
 			 * {@inheritDoc}
 			 *
 			 * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
 			 */
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				super.widgetSelected(e);
 				replaceMainWith(right, viewModelContext.getRightModel());
 			}

 		});

 		return group;
 	}

 	private void createControl(Composite parent, VControl control, EObject domainObject, boolean readonly) {
 		final VView leftView = VViewFactory.eINSTANCE.createView();
 		leftView.setRootEClass(domainObject.eClass());
 		final VControl leftControl = control;
 		leftControl.setReadonly(readonly);
 		leftControl.setLabelAlignment(LabelAlignment.NONE);
 		leftView.getChildren().add(leftControl);
 		try {
 			ECPSWTViewRenderer.INSTANCE.render(parent, domainObject, leftView);
 		} catch (final ECPRendererException ex) {
 			ex.printStackTrace();
 		}
 	}

 	private void replaceMainWith(VControl replaceControl, EObject replaceDomainModel) {
 		DefaultMergeUtil.copyValues(replaceControl, replaceDomainModel, mergeControl, mergeDomainObject);
 	}

 	/**
 	 * Creates the title {@link Label}.
 	 *
 	 * @param parent the {@link Composite}
 	 * @return the control showing the title
 	 */
 	private Control createTitleLabel(final Composite parent) {
 		final Label title = new Label(parent, SWT.NONE);
 		final List<String> breadCrumb = new ArrayList<String>();
 		breadCrumb.add(diffAttribute);
 		EObject parentEObject = main.eContainer();
 		while (!VView.class.isInstance(parentEObject)) {
 			final VElement vElement = (VElement) parentEObject;
 			// FIXME hack -> will filter out groups
 			if (!VContainedElement.class.isInstance(vElement)) {
 				breadCrumb.add(vElement.getName());
 			}
 			parentEObject = parentEObject.eContainer();
 		}

 		Collections.reverse(breadCrumb);
 		final StringBuilder sb = new StringBuilder();
 		for (final String bc : breadCrumb) {
 			if (sb.length() != 0) {
 				sb.append(">"); //$NON-NLS-1$
 			}
 			sb.append(bc);
 		}
 		title.setText(sb.toString());
 		title.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_title"); //$NON-NLS-1$
 		return title;
 	}

 	private void saveAndCloseDialog(final Shell shell) {
 		DefaultMergeUtil.copyValues(mergeControl, mergeDomainObject, main, viewModelContext.getDomainModel());

 		viewModelContext.markControl(main, diffConfirmed);

 		shell.dispose();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2011-2014 EclipseSource Muenchen GmbH and others.
	*
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* Eugen Neufeld - initial API and implementation
	******************************************************************************/
	package org.eclipse.emf.ecp.diffmerge.swt;

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

	import org.eclipse.emf.common.command.BasicCommandStack;
	import org.eclipse.emf.common.notify.AdapterFactory;
	import org.eclipse.emf.common.util.URI;
	import org.eclipse.emf.ecore.EObject;
	import org.eclipse.emf.ecore.resource.Resource;
	import org.eclipse.emf.ecore.resource.ResourceSet;
	import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
	import org.eclipse.emf.ecore.util.EcoreUtil;
	import org.eclipse.emf.ecp.diffmerge.spi.context.DefaultMergeUtil;
	import org.eclipse.emf.ecp.diffmerge.spi.context.DiffMergeModelContext;
	import org.eclipse.emf.ecp.ui.view.ECPRendererException;
	import org.eclipse.emf.ecp.ui.view.swt.ECPSWTViewRenderer;
	import org.eclipse.emf.ecp.view.spi.model.LabelAlignment;
	import org.eclipse.emf.ecp.view.spi.model.VContainedElement;
	import org.eclipse.emf.ecp.view.spi.model.VControl;
	import org.eclipse.emf.ecp.view.spi.model.VElement;
	import org.eclipse.emf.ecp.view.spi.model.VView;
	import org.eclipse.emf.ecp.view.spi.model.VViewFactory;
	import org.eclipse.emf.edit.domain.AdapterFactoryEditingDomain;
	import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
	import org.eclipse.emf.edit.provider.ReflectiveItemProviderAdapterFactory;
	import org.eclipse.emfforms.spi.localization.LocalizationServiceHelper;
	import org.eclipse.jface.layout.GridDataFactory;
	import org.eclipse.jface.layout.GridLayoutFactory;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.ScrolledComposite;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Point;
	import org.eclipse.swt.layout.FillLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Group;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Shell;

	/**
	* Class creating a diff Dialog.
	*
	* @author Eugen Neufeld
	*
	*/
	public class DiffDialog {

	/**
	* Variant constant for indicating RAP controls.
	*/
	private static final String CUSTOM_VARIANT = "org.eclipse.rap.rwt.customVariant"; //$NON-NLS-1$

	private final VControl left;
	private final VControl right;
	private final VControl main;
	private final String diffAttribute;
	private final DiffMergeModelContext viewModelContext;

	private VControl mergeControl;
	private EObject mergeDomainObject;
	private boolean diffConfirmed = true;

	/**
	* Constructor for the diff dialog.
	*
	* @param viewModelContext the {@link org.eclipse.emf.ecp.view.spi.context.ViewModelContext ViewModelContext}
	* @param diffAttribute the display name of the attribute
	* @param left the left {@link VControl}
	* @param right the right {@link VControl}
	* @param main the main {@link VControl}
	*/
	public DiffDialog(DiffMergeModelContext viewModelContext, String diffAttribute, VControl left,
	VControl right, VControl main) {
	this.viewModelContext = viewModelContext;
	this.diffAttribute = diffAttribute;
	this.left = left;
	this.right = right;
	this.main = main;
	}

	/**
	* Creates the dialog content.
	*
	* @param parent the parent {@link Composite}
	*/
	public void create(Composite parent) {
	final Composite mainComposite = new Composite(parent, SWT.NONE);
	GridLayoutFactory.fillDefaults().numColumns(1).equalWidth(false).extendedMargins(10, 10, 10, 10)
	.applyTo(mainComposite);
	final ScrolledComposite scrolledComposite = new ScrolledComposite(mainComposite, SWT.H_SCROLL
	\| SWT.V_SCROLL);
	{
	scrolledComposite.setExpandHorizontal(true);
	scrolledComposite.setExpandVertical(true);
	scrolledComposite.setShowFocusedControl(true);
	GridLayoutFactory.fillDefaults().numColumns(1).equalWidth(false).applyTo(scrolledComposite);
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).grab(true, true).applyTo(scrolledComposite);

	final Composite composite = new Composite(scrolledComposite, SWT.NONE);
	GridLayoutFactory.fillDefaults().numColumns(1).equalWidth(false)
	.applyTo(composite);
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).grab(true, true).applyTo(composite);

	final Control title = createTitleLabel(composite);
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(title);

	final Control diff = createDiff(composite);
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(false, false).applyTo(diff);

	final Control merge = createTarget(composite);
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(false, false).applyTo(merge);

	scrolledComposite.setContent(composite);
	composite.layout();
	final Point point = composite.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	scrolledComposite.setMinSize(point);
	}
	final Control nextPrevious = createButtonRow(mainComposite);
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(true, false).applyTo(nextPrevious);

	}

	private Control createButtonRow(Composite parent) {
	final Composite buttonRowComposite = new Composite(parent, SWT.NONE);
	buttonRowComposite.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_buttonRow"); //$NON-NLS-1$
	GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(true).applyTo(buttonRowComposite);

	{
	final Composite diffConfirmedComposite = new Composite(buttonRowComposite, SWT.NONE);
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(true, false).span(2, 1)
	.applyTo(diffConfirmedComposite);
	diffConfirmedComposite.setLayout(new FillLayout(SWT.HORIZONTAL));
	final Button buttonDiffConfirmed = new Button(diffConfirmedComposite, SWT.CHECK);
	buttonDiffConfirmed.setText(LocalizationServiceHelper.getString(DiffDialog.class,
	MessageKeys.DiffDialog_DiffConfirmed));
	buttonDiffConfirmed.setSelection(diffConfirmed);
	buttonDiffConfirmed.addSelectionListener(new SelectionAdapter() {

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
	*/
	@Override
	public void widgetSelected(SelectionEvent e) {
	super.widgetSelected(e);
	diffConfirmed = buttonDiffConfirmed.getSelection();
	}

	});
	}

	{
	final int index = viewModelContext.getIndexOf(main);

	final Composite nextPreviousComposite = new Composite(buttonRowComposite, SWT.NONE);
	nextPreviousComposite.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_nextPrevious"); //$NON-NLS-1$
	GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(true).applyTo(nextPreviousComposite);
	GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.BEGINNING).grab(true, false)
	.applyTo(nextPreviousComposite);

	final Button previous = new Button(nextPreviousComposite, SWT.PUSH);
	previous.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_Previous));
	previous.setImage(Activator.getImage("icons/arrow_left.png")); //$NON-NLS-1$
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(false, false).applyTo(previous);
	previous.addSelectionListener(new SelectionAdapter() {

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
	*/
	@Override
	public void widgetSelected(SelectionEvent e) {
	super.widgetSelected(e);
	saveAndCloseDialog(previous.getShell());
	DiffDialogHelper.showDialog(viewModelContext, index - 1);
	}

	});
	final Button next = new Button(nextPreviousComposite, SWT.PUSH);
	next.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_Next));
	next.setImage(Activator.getImage("icons/arrow_right.png")); //$NON-NLS-1$
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(false, false).applyTo(next);
	next.addSelectionListener(new SelectionAdapter() {

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
	*/
	@Override
	public void widgetSelected(SelectionEvent e) {
	super.widgetSelected(e);
	saveAndCloseDialog(next.getShell());
	DiffDialogHelper.showDialog(viewModelContext, index + 1);
	}

	});

	if (index == 0) {
	previous.setEnabled(false);
	}
	if (index + 1 == viewModelContext.getTotalNumberOfDiffs()) {
	next.setEnabled(false);
	}
	}

	{
	final Button bConfirm = new Button(buttonRowComposite, SWT.PUSH);
	bConfirm.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_Confirm));
	bConfirm.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_merge_confirm"); //$NON-NLS-1$
	GridDataFactory.fillDefaults().align(SWT.END, SWT.BEGINNING).grab(true, false).applyTo(bConfirm);
	bConfirm.addSelectionListener(new SelectionAdapter() {

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
	*/
	@Override
	public void widgetSelected(SelectionEvent e) {
	super.widgetSelected(e);
	saveAndCloseDialog(bConfirm.getShell());
	}

	});
	}

	return buttonRowComposite;
	}

	/**
	* Creates the Merge content.
	*
	* @param parent the {@link Composite}
	* @return the control showing the merge
	*/
	private Control createTarget(final Composite parent) {
	final Group targetGroup = new Group(parent, SWT.NONE);
	targetGroup.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_target"); //$NON-NLS-1$
	targetGroup.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_targetObject));
	GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(false).applyTo(targetGroup);

	// final Label mainObject = new Label(targetGroup, SWT.NONE);
	// mainObject.setText(Messages.DiffDialog_targetObject);
	// mainObject.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_merge_label"); //$NON-NLS-1$
	// GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.FILL).grab(false, false).applyTo(mainObject);

	mergeControl = EcoreUtil.copy(main);
	final ResourceSet resourceSet = new ResourceSetImpl();
	final AdapterFactoryEditingDomain domain = new AdapterFactoryEditingDomain(
	new ComposedAdapterFactory(new AdapterFactory[] {
	new ReflectiveItemProviderAdapterFactory(),
	new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE) }),
	new BasicCommandStack(), resourceSet);
	mergeDomainObject = EcoreUtil.copy(viewModelContext.getDomainModel());
	resourceSet.eAdapters().add(new AdapterFactoryEditingDomain.EditingDomainProvider(domain));
	final Resource resource = resourceSet.createResource(URI.createURI("VIRTUAL_URI_TEMP")); //$NON-NLS-1$
	resource.getContents().add(mergeDomainObject);
	createControl(targetGroup, mergeControl, mergeDomainObject, false);

	return targetGroup;
	}

	/**
	* Creates the Diff content.
	*
	* @param parent the {@link Composite}
	* @return the control showing the diff
	*/
	private Control createDiff(final Composite parent) {
	final Group group = new Group(parent, SWT.NONE);
	group.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_DifferenceGroup));
	group.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_diff"); //$NON-NLS-1$
	GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(false).applyTo(group);

	final Label leftObject = new Label(group, SWT.NONE);
	leftObject
	.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_leftObject + ":")); //$NON-NLS-1$
	leftObject.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_diff_left"); //$NON-NLS-1$
	GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.FILL).grab(false, false).span(2, 1).applyTo(leftObject);

	createControl(group, EcoreUtil.copy(left), EcoreUtil.copy(viewModelContext.getLeftModel()), true);

	final Button bReplaceWithLeft = new Button(group, SWT.PUSH);
	bReplaceWithLeft.setText(LocalizationServiceHelper
	.getString(DiffDialog.class, MessageKeys.DiffDialog_replaceWithLeft));
	bReplaceWithLeft.setImage(Activator.getImage("icons/arrow_down.png")); //$NON-NLS-1$
	bReplaceWithLeft.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_diff_leftReplace"); //$NON-NLS-1$
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(false, false).applyTo(bReplaceWithLeft);
	bReplaceWithLeft.addSelectionListener(new SelectionAdapter() {

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
	*/
	@Override
	public void widgetSelected(SelectionEvent e) {
	super.widgetSelected(e);
	replaceMainWith(left, viewModelContext.getLeftModel());
	}

	});

	final Label rightObject = new Label(group, SWT.NONE);
	rightObject
	.setText(LocalizationServiceHelper.getString(DiffDialog.class, MessageKeys.DiffDialog_rightObject + ":")); //$NON-NLS-1$
	rightObject.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_diff_right"); //$NON-NLS-1$
	GridDataFactory.fillDefaults().align(SWT.BEGINNING, SWT.FILL).grab(false, false).span(2, 1)
	.applyTo(rightObject);

	createControl(group, EcoreUtil.copy(right), EcoreUtil.copy(viewModelContext.getRightModel()), true);

	final Button bReplaceWithRight = new Button(group, SWT.PUSH);
	bReplaceWithRight.setText(LocalizationServiceHelper.getString(DiffDialog.class,
	MessageKeys.DiffDialog_replaceWithRight));
	bReplaceWithRight.setImage(Activator.getImage("icons/arrow_down.png")); //$NON-NLS-1$
	bReplaceWithLeft.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_diff_rightReplace"); //$NON-NLS-1$
	GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING).grab(false, false).applyTo(bReplaceWithRight);
	bReplaceWithRight.addSelectionListener(new SelectionAdapter() {

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
	*/
	@Override
	public void widgetSelected(SelectionEvent e) {
	super.widgetSelected(e);
	replaceMainWith(right, viewModelContext.getRightModel());
	}

	});

	return group;
	}

	private void createControl(Composite parent, VControl control, EObject domainObject, boolean readonly) {
	final VView leftView = VViewFactory.eINSTANCE.createView();
	leftView.setRootEClass(domainObject.eClass());
	final VControl leftControl = control;
	leftControl.setReadonly(readonly);
	leftControl.setLabelAlignment(LabelAlignment.NONE);
	leftView.getChildren().add(leftControl);
	try {
	ECPSWTViewRenderer.INSTANCE.render(parent, domainObject, leftView);
	} catch (final ECPRendererException ex) {
	ex.printStackTrace();
	}
	}

	private void replaceMainWith(VControl replaceControl, EObject replaceDomainModel) {
	DefaultMergeUtil.copyValues(replaceControl, replaceDomainModel, mergeControl, mergeDomainObject);
	}

	/**
	* Creates the title {@link Label}.
	*
	* @param parent the {@link Composite}
	* @return the control showing the title
	*/
	private Control createTitleLabel(final Composite parent) {
	final Label title = new Label(parent, SWT.NONE);
	final List<String> breadCrumb = new ArrayList<String>();
	breadCrumb.add(diffAttribute);
	EObject parentEObject = main.eContainer();
	while (!VView.class.isInstance(parentEObject)) {
	final VElement vElement = (VElement) parentEObject;
	// FIXME hack -> will filter out groups
	if (!VContainedElement.class.isInstance(vElement)) {
	breadCrumb.add(vElement.getName());
	}
	parentEObject = parentEObject.eContainer();
	}

	Collections.reverse(breadCrumb);
	final StringBuilder sb = new StringBuilder();
	for (final String bc : breadCrumb) {
	if (sb.length() != 0) {
	sb.append(">"); //$NON-NLS-1$
	}
	sb.append(bc);
	}
	title.setText(sb.toString());
	title.setData(CUSTOM_VARIANT, "org_eclipse_emf_ecp_compare_dialog_title"); //$NON-NLS-1$
	return title;
	}

	private void saveAndCloseDialog(final Shell shell) {
	DefaultMergeUtil.copyValues(mergeControl, mergeDomainObject, main, viewModelContext.getDomainModel());

	viewModelContext.markControl(main, diffConfirmed);

	shell.dispose();
	}
	}