Java tutorial
/******************************************************************************* * Copyright (c) 2008, 2012 Obeo. * 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: * Obeo - initial API and implementation *******************************************************************************/ package org.eclipse.emf.eef.runtime.ui.widgets.masterdetails.tree; import java.io.IOException; import java.net.URL; import java.util.ArrayList; import java.util.Collections; import java.util.List; import org.eclipse.emf.common.command.Command; import org.eclipse.emf.common.util.EList; import org.eclipse.emf.ecore.EObject; import org.eclipse.emf.ecore.EReference; import org.eclipse.emf.ecore.resource.Resource; import org.eclipse.emf.ecore.util.EcoreUtil; import org.eclipse.emf.edit.command.AddCommand; import org.eclipse.emf.edit.command.RemoveCommand; import org.eclipse.emf.edit.domain.AdapterFactoryEditingDomain; import org.eclipse.emf.edit.domain.EditingDomain; import org.eclipse.emf.edit.provider.IItemLabelProvider; import org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider; import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider; import org.eclipse.emf.eef.runtime.EEFRuntimePlugin; import org.eclipse.emf.eef.runtime.impl.utils.EEFCommandParameter; import org.eclipse.emf.eef.runtime.ui.layout.EEFFormLayoutFactory; import org.eclipse.emf.eef.runtime.ui.notify.DropDownSelectionListener; import org.eclipse.emf.eef.runtime.ui.widgets.masterdetails.AbstractEEFMasterDetailsBlock; import org.eclipse.emf.eef.runtime.ui.widgets.masterdetails.AbstractEEFMasterPart; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.swt.SWT; 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.MenuItem; import org.eclipse.swt.widgets.Tree; import org.eclipse.ui.forms.widgets.FormToolkit; /** * @author <a href="mailto:goulwen.lefur@obeo.fr">Goulwen Le Fur</a> */ public class EEFTreeMasterPart extends AbstractEEFMasterPart { private List<EEFCommandParameter> commandParameters; private EObject modelRoot; private EditingDomain editingDomain; private Composite modelToolBar; private boolean showModelToolBar = true; /** * @param managedForm * the form where this part will be * @param container * the composite where to create the part * @param block * the AbstractEEFMasterDetailsBlock which will contain this part */ public EEFTreeMasterPart(FormToolkit toolkit, Composite container, AbstractEEFMasterDetailsBlock block) { super(toolkit, container, block); } /** * {@inheritDoc} * * @see org.eclipse.emf.eef.runtime.ui.widgets.masterdetails.AbstractEEFMasterPart#createSectionClientContents(org.eclipse.swt.widgets.Composite, * org.eclipse.ui.forms.widgets.FormToolkit) */ protected TreeViewer createSectionClientContents(Composite sectionContainer, FormToolkit toolkit) { Tree tree = toolkit.createTree(sectionContainer, SWT.MULTI | SWT.BORDER); TreeViewer result = new TreeViewer(tree); result.setContentProvider(new AdapterFactoryContentProvider(getAdapterFactory())); result.setLabelProvider(new AdapterFactoryLabelProvider(getAdapterFactory())); GridData gd = new GridData(GridData.FILL_BOTH); gd.widthHint = 80; tree.setLayoutData(gd); return result; } /** * @return the list of command parameters */ public List<EEFCommandParameter> getCommandParameter() { if (commandParameters == null) { createCommandParameters(); } return commandParameters; } /** * initialize the command parameters. If this method is called whether command parameters are already * initialized, old values will be erased */ private void createCommandParameters() { if (modelRoot == null) { commandParameters = new ArrayList<EEFCommandParameter>(); } else { ViewerFilter[] filters = getModelViewer().getFilters(); commandParameters = new ArrayList<EEFCommandParameter>(); for (EReference reference : modelRoot.eClass().getEAllReferences()) { if (!reference.isContainment()) { // Create command parameter for containment references only. continue; } else if (filters.length > 0) { // if filters has been added for (ViewerFilter filter : filters) { if (filter.select(modelViewer, modelRoot, EcoreUtil.create(reference.getEReferenceType()))) { commandParameters .add(new EEFCommandParameter(reference, reference.getEReferenceType())); } } } else { commandParameters.add(new EEFCommandParameter(reference, reference.getEReferenceType())); } } } } /** * {@inheritDoc} */ @Override protected void createSectionClient(Composite sectionContainer, FormToolkit toolkit) { sectionContainer.setLayout(new GridLayout()); createModelRoot(); if (modelRoot != null) { createToolBar(sectionContainer, toolkit); } createModelViewer(sectionContainer, toolkit); } /** * initialize model root */ private void createModelRoot() { editingDomain = getBlock().getEditingDomain(); if (editingDomain instanceof AdapterFactoryEditingDomain) { AdapterFactoryEditingDomain afed = (AdapterFactoryEditingDomain) editingDomain; setAdapterFactory(afed.getAdapterFactory()); EList<Resource> resources = afed.getResourceSet().getResources(); if (resources != null && resources.size() != 0) { // Assuming the main resource is the first resource Resource resource = resources.get(0); if (resource.getContents() != null && resource.getContents().size() > 0) { modelRoot = resource.getContents().get(0); } } } } /** * create the tool bar (add button and delete button) * * @param sectionContainer * @param toolkit */ private void createToolBar(Composite sectionContainer, FormToolkit toolkit) { if (modelRoot != null) { modelToolBar = new Composite(sectionContainer, SWT.NONE); GridLayout layout = new GridLayout(); layout.numColumns = 2; layout.makeColumnsEqualWidth = true; modelToolBar.setLayout(layout); // if the root element doesn't has any child, the toolbar (add and delete buttons) is hidden. if (modelRoot.eClass().getEAllReferences().size() == 0) modelToolBar.setVisible(false); // Add button createAddButton(toolkit, modelToolBar); // delete button createDeleteButton(toolkit, modelToolBar); } } /** * Create the TreeView container * * @param sectionContainer * @param toolkit */ private void createModelViewer(Composite sectionContainer, FormToolkit toolkit) { Composite modelViewerComposite = new Composite(sectionContainer, SWT.NONE); modelViewerComposite.setLayout(EEFFormLayoutFactory.createMasterGridLayout(false, 1)); modelViewerComposite.setLayoutData(new GridData(GridData.FILL_BOTH)); super.createSectionClient(modelViewerComposite, toolkit); } /** * initialize delete button * * @param toolkit */ private void createDeleteButton(FormToolkit toolkit, Composite modelToolBar) { Button delete = toolkit.createButton(modelToolBar, "", SWT.PUSH); delete.setImage(EEFRuntimePlugin.getImage(EEFRuntimePlugin.ICONS_16x16 + "Delete_16x16.gif")); delete.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { IStructuredSelection selection = (IStructuredSelection) getModelViewer().getSelection(); for (Object object : selection.toList()) { if (editingDomain != null) { Command command = RemoveCommand.create(editingDomain, object); editingDomain.getCommandStack().execute(command); } } } }); } /** * initialize add button * * @param toolkit */ private void createAddButton(FormToolkit toolkit, Composite modelToolBar) { Button add = toolkit.createButton(modelToolBar, "", SWT.PUSH); add.setImage(EEFRuntimePlugin.getImage(EEFRuntimePlugin.ICONS_16x16 + "Add_16x16.gif")); DropDownSelectionListener listenerAdd = new DropDownSelectionListener(add) { boolean init = false; @Override public void widgetSelected(SelectionEvent e) { if (!init) { // add every element into menu for (EEFCommandParameter commandParameter : getCommandParameter()) { add(commandParameter); } if (menu.getItemCount() == 0) { ((Button) e.getSource()).setEnabled(false); } init = true; } super.widgetSelected(e); } public void add(final EEFCommandParameter commandParameter) { IItemLabelProvider adapte = (IItemLabelProvider) getAdapterFactory() .adapt(EcoreUtil.create(commandParameter.geteClass()), IItemLabelProvider.class); URL image = (URL) adapte.getImage(EcoreUtil.create(commandParameter.geteClass())); MenuItem menuItem = new MenuItem(menu, SWT.NONE); menuItem.setText(adapte.getText(EcoreUtil.create(commandParameter.geteClass()))); menuItem.setImage(ImageDescriptor.createFromURL(image).createImage(menuItem.getDisplay())); menuItem.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { EObject value = EcoreUtil.create(commandParameter.geteClass()); if (editingDomain != null) { Command command = AddCommand.create(editingDomain, modelRoot, null, value); editingDomain.getCommandStack().execute(command); } // try { // modelRoot.eResource().save(Collections.EMPTY_MAP); // // } catch (IOException e1) { // e1.printStackTrace(); // } } }); } }; add.addSelectionListener(listenerAdd); } /** * {@inheritDoc} */ @Override public void addFilter(ViewerFilter filter) { super.addFilter(filter); createCommandParameters(); if (modelToolBar != null) { if (commandParameters.size() == 0) { modelToolBar.setVisible(false); } else if (showModelToolBar != false) { modelToolBar.setVisible(true); } } } public void showToolBar(boolean value) { if (modelToolBar != null) { modelToolBar.setVisible(value); showModelToolBar = value; } } }