Java tutorial
package com.temenos.interaction.rimdsl.visualisation.views; /* * #%L * com.temenos.interaction.rimdsl.RimDsl - Visualisation * %% * Copyright (C) 2012 - 2013 Temenos Holdings N.V. * %% * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * #L% */ import org.eclipse.swt.widgets.Composite; import org.eclipse.ui.forms.widgets.FormToolkit; import org.eclipse.ui.forms.widgets.ScrolledForm; import org.eclipse.ui.part.*; import org.eclipse.emf.ecore.EObject; import org.eclipse.jface.text.ITextSelection; import org.eclipse.jface.viewers.*; import org.eclipse.jface.action.*; import org.eclipse.ui.*; import org.eclipse.xtext.nodemodel.impl.CompositeNode; import org.eclipse.xtext.nodemodel.impl.LeafNode; import org.eclipse.xtext.nodemodel.util.NodeModelUtils; import org.eclipse.xtext.parser.IParseResult; import org.eclipse.xtext.resource.XtextResource; import org.eclipse.xtext.ui.editor.XtextEditor; import org.eclipse.xtext.ui.editor.model.IXtextDocument; import org.eclipse.xtext.util.concurrent.IUnitOfWork; import org.eclipse.zest.core.viewers.AbstractZoomableViewer; import org.eclipse.zest.core.viewers.GraphViewer; import org.eclipse.zest.core.viewers.IZoomableWorkbenchPart; import org.eclipse.zest.core.viewers.ZoomContributionViewItem; import org.eclipse.swt.widgets.Menu; /** * This class implements the Resource Interaction Model plug-in in a * workbench view. * @author aphethean */ public class RIMDSLVisualisationView extends ViewPart implements IZoomableWorkbenchPart, ISelectionListener { /** * The ID of the view as specified by the extension. */ public static final String ID = "com.temenos.interaction.rimdsl.visualisation.views.RIMDSLVisualisationView"; private FormToolkit toolKit = null; private ScrolledForm form = null; private GraphViewer viewer; private ZoomContributionViewItem contextZoomContributionViewItem; private TransitionForm visualizationForm; /** * The constructor. */ public RIMDSLVisualisationView() { } /** * This is a callback that will allow us * to create the viewer and initialize it. */ public void createPartControl(Composite parent) { toolKit = new FormToolkit(parent.getDisplay()); visualizationForm = new TransitionForm(parent, toolKit, this); viewer = visualizationForm.getGraphViewer(); form = visualizationForm.getForm(); hookContextMenu(); fillToolBar(); // Register selection service listener getSite().getWorkbenchWindow().getSelectionService().addPostSelectionListener(this); } /** * Set the toolbar */ private void fillToolBar() { ZoomContributionViewItem toolbarZoomContributionViewItem = new ZoomContributionViewItem(this); IActionBars bars = getViewSite().getActionBars(); bars.getMenuManager().add(toolbarZoomContributionViewItem); IToolBarManager toolBarManager = bars.getToolBarManager(); toolBarManager.add(visualizationForm.showIncomingRelationsAction); toolBarManager.add(visualizationForm.showOutgoingRelationsAction); } /** * Creates the context menu for this view. */ private void hookContextMenu() { contextZoomContributionViewItem = new ZoomContributionViewItem(this); MenuManager menuMgr = new MenuManager("#PopupMenu"); menuMgr.setRemoveAllWhenShown(true); fillContextMenu(menuMgr); menuMgr.addMenuListener(new IMenuListener() { public void menuAboutToShow(IMenuManager manager) { RIMDSLVisualisationView.this.fillContextMenu(manager); } }); Menu menu = menuMgr.createContextMenu(viewer.getControl()); viewer.getControl().setMenu(menu); getSite().registerContextMenu(menuMgr, viewer); } /** * Add the items to the context menu * * @param manager */ private void fillContextMenu(IMenuManager manager) { manager.add(visualizationForm.showIncomingRelationsAction); manager.add(visualizationForm.showOutgoingRelationsAction); manager.add(new Separator()); manager.add(contextZoomContributionViewItem); } /** * Passing the focus request to the viewer's control. */ public void setFocus() { form.setFocus(); } public void selectionChanged(IWorkbenchPart sourcepart, ISelection selection) { // we ignore our own selections if (sourcepart != this) { if (!selection.isEmpty() && selection instanceof ITextSelection && sourcepart instanceof XtextEditor) { final ITextSelection textSel = (ITextSelection) selection; final XtextEditor editor = (XtextEditor) sourcepart; final IXtextDocument document = editor.getDocument(); // determine the model element at the offset // Access to the underlying resource in the Xtext editor need to be encapsulated by an IUnitOfWork document.readOnly(new IUnitOfWork.Void<XtextResource>() { public void process(XtextResource resource) throws Exception { // parse the whole resource IParseResult parseResult = resource.getParseResult(); if (parseResult == null) return; // Get the root of the parsing result CompositeNode rootNode = (CompositeNode) parseResult.getRootNode(); // Get the parsing result around the current offset int offset = textSel.getOffset(); LeafNode node = (LeafNode) NodeModelUtils.findLeafNodeAtOffset(rootNode, offset); EObject object = NodeModelUtils.findActualSemanticObjectFor(node); visualizationForm.setInput(object); } }); } else { visualizationForm.setInput(null); } } } public AbstractZoomableViewer getZoomableViewer() { return viewer; } public void dispose() { super.dispose(); // Unregister selection service listener getSite().getWorkbenchWindow().getSelectionService().removePostSelectionListener(this); } }