Java tutorial
/***************************************************************************** * Copyright (c) 2010 Atos Origin. * * * 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: * Atos Origin - Initial API and implementation * *****************************************************************************/ package org.eclipse.papyrus.uml.diagram.activity.edit.dialogs; import java.util.Collection; import java.util.HashSet; import org.eclipse.emf.ecore.EObject; import org.eclipse.emf.ecore.EStructuralFeature.Setting; import org.eclipse.gmf.runtime.notation.View; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.ILabelProvider; import org.eclipse.papyrus.uml.diagram.activity.part.Messages; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.forms.widgets.FormText; import org.eclipse.ui.forms.widgets.FormToolkit; import org.eclipse.uml2.common.util.CacheAdapter; import org.eclipse.uml2.uml.NamedElement; import org.eclipse.uml2.uml.Property; /** * WarningAndCreateAttributeDialog warns the user he can not perform an action. * It enables him to create an attribute instead after appropriate warnings. */ public class WarningAndCreateAttributeDialog extends MessageDialog { /** Label of the create button */ private static final String CREATE_LABEL = Messages.CreateAttributeDialog_Open; /** Start form tag */ private static final String START_FORM = "<form>"; /** End form tag */ private static final String END_FORM = "</form>"; /** List tag with content format */ private static final String LIST_FORMAT = "<li>%s</li>"; /** < symbol to replace */ private static final String LT = "<"; /** < symbol escaped replacement */ private static final String ESC_LT = "<"; /** > symbol to replace */ private static final String GT = ">"; /** > symbol escaped replacement */ private static final String ESC_GT = ">"; /** Element owning the attribute if created */ private NamedElement attributeOwner = null; /** Created attribute */ private Property attribute; /** Label provider to use */ private ILabelProvider provider = null; /** * Constructor. * * @param parentShell * shell * @param dialogTitle * title of the dialog * @param dialogMessage * main message of the dialog * @param linkElement * element to show * @param labelProvider * label provider */ public WarningAndCreateAttributeDialog(Shell parentShell, String dialogTitle, String dialogMessage, NamedElement linkElement, ILabelProvider labelProvider) { super(parentShell, dialogTitle, null, dialogMessage, WARNING, new String[] { CREATE_LABEL, IDialogConstants.CLOSE_LABEL }, 0); attributeOwner = linkElement; provider = labelProvider; } /** * Create the deactivated link and the warning message for attribute creation * * @see org.eclipse.papyrus.uml.diagram.activity.edit.dialogs.WarningAndLinkDialog#createCustomArea(org.eclipse.swt.widgets.Composite) * @param parent * the parent composite * @return hyperlink */ @Override protected Control createCustomArea(Composite parent) { Control result = super.createCustomArea(parent); FormToolkit toolkit = new FormToolkit(parent.getDisplay()); FormText text = toolkit.createFormText(parent, false); text.setText(getImpactedElementsText(), true, false); text.setBackground(parent.getBackground()); text.setLayoutData(new GridData(GridData.FILL_BOTH)); return result; } /** * Get the text to warn about the impacts of attribute creation * * @return text */ private String getImpactedElementsText() { StringBuffer completeText = new StringBuffer(); completeText.append(START_FORM); StringBuffer impactText = new StringBuffer(); // explore referencing elements Collection<Setting> references = CacheAdapter.INSTANCE.getNonNavigableInverseReferences(attributeOwner); HashSet<EObject> impactedElements = new HashSet<EObject>(); for (Setting ref : references) { EObject referencing = ref.getEObject(); if (referencing.eContainer() != null && !(referencing instanceof View) && !impactedElements.contains(referencing)) { impactedElements.add(referencing); String elementText = provider.getText(referencing); elementText = elementText.replaceAll(LT, ESC_LT).replaceAll(GT, ESC_GT); if (referencing instanceof NamedElement) { String qualifiedName = ((NamedElement) referencing).getQualifiedName(); if (qualifiedName != null && qualifiedName.length() != 0) { elementText = elementText + " (" + qualifiedName + ")"; } } impactText.append(String.format(LIST_FORMAT, elementText)); } } if (impactedElements.size() <= 1) { completeText.append(Messages.CreateAttributeDialog_WarnNoImpact); } else { completeText.append(Messages.CreateAttributeDialog_WarnImpact); completeText.append(impactText.toString()); } completeText.append(END_FORM); return completeText.toString(); } /** * Launch create dialog if needed. * * @see org.eclipse.jface.dialogs.MessageDialog#buttonPressed(int) * @param buttonId * id of pressed button */ @Override protected void buttonPressed(int buttonId) { if (buttonId == OK) { // Create button has been pressed CreateAttributeDialog dialog = new CreateAttributeDialog(getShell(), attributeOwner); // close dialog only if attribute has been created if (dialog.open() == OK) { attribute = dialog.getCreatedAttribute(); super.buttonPressed(buttonId); } } else { super.buttonPressed(buttonId); } } /** * Get the created attribute * * @return created attribute or null */ public Property getAttribute() { return attribute; } }