Java tutorial
/******************************************************************************* * Copyright (c) 2011-2015 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 v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Eugen Neufeld - initial API and implementation * *******************************************************************************/ package org.eclipse.emf.ecp.edit.spi.swt.reference; import java.net.MalformedURLException; import java.net.URL; import org.eclipse.emf.common.util.URI; import org.eclipse.emf.ecore.EObject; import org.eclipse.emf.ecore.EReference; import org.eclipse.emf.ecore.EStructuralFeature.Setting; import org.eclipse.emf.ecp.edit.internal.swt.Activator; import org.eclipse.emf.ecp.edit.internal.swt.reference.ReferenceMessageKeys; import org.eclipse.emf.ecp.edit.internal.swt.util.OverlayImageDescriptor; import org.eclipse.emf.ecp.edit.spi.ReferenceService; import org.eclipse.emf.ecp.edit.spi.swt.actions.ECPSWTAction; import org.eclipse.emf.ecp.edit.spi.swt.util.ECPDialogExecutor; import org.eclipse.emf.edit.domain.EditingDomain; import org.eclipse.emf.edit.provider.ComposedImage; import org.eclipse.emf.edit.provider.IItemLabelProvider; import org.eclipse.emf.edit.provider.IItemPropertyDescriptor; import org.eclipse.emfforms.spi.localization.LocalizationServiceHelper; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.window.Window; import org.eclipse.swt.graphics.ImageData; /** * An Action for adding reference links to a model element. It is mainly used in the * {@link org.eclipse.emf.ecp.edit.internal.swt.controls.MultiControl MultiControl} * * @author shterev * @author Eugen Neufeld * @since 1.5 */ public class AddReferenceAction extends ECPSWTAction { private final ReferenceService referenceService; /** * The constructor for the add reference action. * * @param editingDomain the {@link EditingDomain} to use * @param setting the {@link Setting} to use * @param itemPropertyDescriptor the property descriptor * @param referenceService the {@link ReferenceService} */ public AddReferenceAction(EditingDomain editingDomain, Setting setting, IItemPropertyDescriptor itemPropertyDescriptor, ReferenceService referenceService) { super(editingDomain, setting); this.referenceService = referenceService; final EReference eReference = (EReference) setting.getEStructuralFeature(); Object obj = null; if (!eReference.getEReferenceType().isAbstract()) { obj = eReference.getEReferenceType().getEPackage().getEFactoryInstance() .create(eReference.getEReferenceType()); } final IItemLabelProvider labelProvider = itemPropertyDescriptor.getLabelProvider(setting.getEObject()); Object labelProviderImageResult = labelProvider.getImage(obj); ImageData imageData = null; if (ComposedImage.class.isInstance(labelProviderImageResult)) { labelProviderImageResult = ((ComposedImage) labelProviderImageResult).getImages().get(0); } if (URI.class.isInstance(labelProviderImageResult)) { try { labelProviderImageResult = new URL(((URI) labelProviderImageResult).toString()); } catch (final MalformedURLException ex) { Activator.logException(ex); } } if (URL.class.isInstance(labelProviderImageResult)) { imageData = Activator.getImageData((URL) labelProviderImageResult); } else { imageData = Activator.getImageData((URL) null); } String overlayString = "icons/link_overlay.png";//$NON-NLS-1$ if (eReference.isContainment()) { overlayString = "icons/containment_overlay.png";//$NON-NLS-1$ } final ImageDescriptor addOverlay = Activator.getImageDescriptor(overlayString); final OverlayImageDescriptor imageDescriptor = new OverlayImageDescriptor(imageData, addOverlay, OverlayImageDescriptor.LOWER_RIGHT); setImageDescriptor(imageDescriptor); String attribute = itemPropertyDescriptor.getDisplayName(null); // make singular attribute labels // TODO language dependent if (attribute.endsWith("ies")) {//$NON-NLS-1$ attribute = attribute.substring(0, attribute.length() - 3) + "y"; //$NON-NLS-1$ } else if (attribute.endsWith("s")) {//$NON-NLS-1$ attribute = attribute.substring(0, attribute.length() - 1); } setToolTipText(LocalizationServiceHelper.getString(getClass(), ReferenceMessageKeys.AddReferenceAction_Link) + attribute); } /** * {@inheritDoc} */ @Override public void run() { final EReference eReference = (EReference) getSetting().getEStructuralFeature(); if (eReference.isContainment()) { final MessageDialog dialog = getContainmentWarningDialog(); new ECPDialogExecutor(dialog) { @Override public void handleResult(int codeResult) { if (codeResult == Window.OK) { addExistingElementsToReferenceService(getSetting().getEObject(), (EReference) getSetting().getEStructuralFeature()); } } }.execute(); } addExistingElementsToReferenceService(getSetting().getEObject(), (EReference) getSetting().getEStructuralFeature()); } private void addExistingElementsToReferenceService(EObject eObject, EReference eReference) { if (referenceService == null) { return; } referenceService.addExistingModelElements(eObject, eReference); } private MessageDialog getContainmentWarningDialog() { return new MessageDialog(null, LocalizationServiceHelper .getString(AddReferenceAction.class, ReferenceMessageKeys.AddReferenceAction_Confirmation), null, LocalizationServiceHelper .getString(AddReferenceAction.class, ReferenceMessageKeys.AddReferenceAction_Warning), MessageDialog.WARNING, new String[] { LocalizationServiceHelper.getString(AddReferenceAction.class, ReferenceMessageKeys.AddReferenceAction_Yes), LocalizationServiceHelper.getString(AddReferenceAction.class, ReferenceMessageKeys.AddReferenceAction_No) }, 0); } }