Java tutorial
/******************************************************************************* * Copyright (c) 2010 BestSolution.at 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: * Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation ******************************************************************************/ package org.eclipse.e4.demo.simpleide.navigator.internal; import org.eclipse.e4.ui.workbench.modeling.ESelectionService; import java.util.Arrays; import java.util.HashMap; import java.util.Map; import javax.inject.Inject; import org.eclipse.core.commands.Command; import org.eclipse.core.commands.ParameterizedCommand; import org.eclipse.core.databinding.observable.IObservable; import org.eclipse.core.databinding.observable.Observables; import org.eclipse.core.databinding.observable.Realm; import org.eclipse.core.databinding.observable.masterdetail.IObservableFactory; import org.eclipse.core.databinding.observable.set.IObservableSet; import org.eclipse.core.databinding.observable.set.WritableSet; import org.eclipse.core.resources.IContainer; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IResourceChangeEvent; import org.eclipse.core.resources.IResourceChangeListener; import org.eclipse.core.resources.IResourceDelta; import org.eclipse.core.resources.IResourceDeltaVisitor; import org.eclipse.core.resources.IWorkspace; import org.eclipse.core.runtime.CoreException; import org.eclipse.e4.core.commands.ECommandService; import org.eclipse.e4.core.commands.EHandlerService; import org.eclipse.e4.core.contexts.IEclipseContext; import org.eclipse.e4.demo.simpleide.model.simpleide.MEditorPartDescriptor; import org.eclipse.e4.demo.simpleide.model.simpleide.MSimpleIDEApplication; import org.eclipse.e4.demo.simpleide.services.IImportResourceService; import org.eclipse.e4.ui.model.application.MApplication; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.IMenuListener; import org.eclipse.jface.action.IMenuManager; import org.eclipse.jface.action.MenuManager; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.viewers.ObservableSetTreeContentProvider; import org.eclipse.jface.databinding.viewers.TreeStructureAdvisor; import org.eclipse.jface.viewers.IOpenListener; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.OpenEvent; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.ViewerSorter; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Shell; public class ResourceNavigator { private Map<IContainer, IObservableSet> observableSets = new HashMap<IContainer, IObservableSet>(); @Inject private ECommandService commandService; @Inject private EHandlerService handlerService; private IResourceChangeListener listener = new IResourceChangeListener() { public void resourceChanged(IResourceChangeEvent event) { if (event.getType() == IResourceChangeEvent.POST_CHANGE) { try { event.getDelta().accept(new IResourceDeltaVisitor() { public boolean visit(IResourceDelta delta) throws CoreException { if (delta.getKind() == IResourceDelta.ADDED) { handleChange(delta.getResource(), delta.getResource().getParent(), true); } else if (delta.getKind() == IResourceDelta.REMOVED) { handleChange(delta.getResource(), delta.getResource().getParent(), false); } return true; } private void handleChange(final IResource resource, final IContainer parent, final boolean added) { final IObservableSet set = observableSets.get(parent); Realm realm = set != null ? set.getRealm() : null; if (realm != null) { realm.asyncExec(new Runnable() { public void run() { if (added) { set.add(resource); } else { set.remove(resource); } } }); } } }); } catch (CoreException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }; private IEclipseContext context; @Inject private ServiceRegistryComponent serviceRegistry; @Inject private MApplication application; @Inject private ESelectionService selectionService; @Inject public ResourceNavigator(Composite parent, final IEclipseContext context, IWorkspace workspace) { final Realm realm = SWTObservables.getRealm(parent.getDisplay()); this.context = context; parent.setLayout(new FillLayout()); TreeViewer viewer = new TreeViewer(parent, SWT.FULL_SELECTION | SWT.H_SCROLL | SWT.V_SCROLL); viewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { StructuredSelection selection = (StructuredSelection) event.getSelection(); selectionService .setSelection(selection.size() == 1 ? selection.getFirstElement() : selection.toArray()); // context.modify(IServiceConstants.ACTIVE_SELECTION, selection.size() == 1 ? selection.getFirstElement() : selection.toArray()); } }); IObservableFactory setFactory = new IObservableFactory() { public IObservable createObservable(Object element) { if (element instanceof IContainer && ((IContainer) element).exists()) { IObservableSet observableSet = observableSets.get(element); if (observableSet == null) { observableSet = new WritableSet(realm); try { observableSet.addAll(Arrays.asList(((IContainer) element).members())); } catch (CoreException e) { // TODO Auto-generated catch block e.printStackTrace(); } observableSets.put((IContainer) element, observableSet); } return observableSet; } return Observables.emptyObservableSet(); } }; viewer.setContentProvider(new ObservableSetTreeContentProvider(setFactory, new TreeStructureAdvisor() { public Boolean hasChildren(Object element) { return Boolean.valueOf(element instanceof IContainer); } })); viewer.setLabelProvider(new LabelProvider() { public String getText(Object element) { if (element instanceof IResource) return ((IResource) element).getName(); return element == null ? "" : element.toString(); } }); viewer.setSorter(new ViewerSorter()); viewer.setInput(workspace.getRoot()); viewer.addOpenListener(new IOpenListener() { public void open(OpenEvent event) { MSimpleIDEApplication app = (MSimpleIDEApplication) application; IStructuredSelection s = (IStructuredSelection) event.getSelection(); for (Object o : s.toArray()) { if (o instanceof IFile) { IFile f = (IFile) o; context.set(IFile.class, f); String fExt = f.getFileExtension(); EDITOR: for (MEditorPartDescriptor desc : app.getEditorPartDescriptors()) { for (String ext : desc.getFileextensions()) { if (ext.equals(fExt)) { context.set(MEditorPartDescriptor.class, desc); System.err.println("Opening with: " + desc); Command cmd = commandService.getCommand("simpleide.command.openeditor"); ParameterizedCommand pCmd = ParameterizedCommand.generateCommand(cmd, null); handlerService.executeHandler(pCmd); break EDITOR; } } } } } } }); setupContextMenu(viewer, parent.getShell()); workspace.addResourceChangeListener(listener); } private void setupContextMenu(final TreeViewer viewer, final Shell shell) { MenuManager mgr = new MenuManager(); viewer.getControl().setMenu(mgr.createContextMenu(viewer.getControl())); mgr.setRemoveAllWhenShown(true); mgr.addMenuListener(new IMenuListener() { public void menuAboutToShow(IMenuManager manager) { MenuManager mgr = new MenuManager("Import"); for (IImportResourceService s : serviceRegistry.getImportServices()) { final IImportResourceService tmp = s; Action a = new Action(s.getLabel()) { public void run() { tmp.importResource(shell, context.createChild()); } }; mgr.add(a); } manager.add(mgr); } }); } }