Java tutorial
/******************************************************************************* * Copyright (c) 2011-2014 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: * Johannes Faltermeier - initial API and implementation ******************************************************************************/ package org.eclipse.emf.ecp.view.internal.editor.controls; import java.net.URL; import org.eclipse.core.databinding.Binding; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.observable.IObserving; import org.eclipse.core.databinding.observable.value.IObservableValue; import org.eclipse.core.databinding.property.value.IValueProperty; import org.eclipse.emf.common.command.Command; import org.eclipse.emf.common.notify.AdapterFactory; import org.eclipse.emf.ecore.EObject; import org.eclipse.emf.ecore.EReference; import org.eclipse.emf.ecore.EStructuralFeature; import org.eclipse.emf.ecp.edit.spi.swt.reference.DeleteReferenceAction; import org.eclipse.emf.ecp.edit.spi.swt.reference.NewReferenceAction; import org.eclipse.emf.ecp.edit.spi.util.ECPModelElementChangeListener; import org.eclipse.emf.ecp.view.spi.context.ViewModelContext; import org.eclipse.emf.ecp.view.spi.core.swt.SimpleControlSWTControlSWTRenderer; import org.eclipse.emf.ecp.view.spi.model.VControl; import org.eclipse.emf.ecp.view.spi.model.VView; import org.eclipse.emf.ecp.view.spi.model.VViewFactory; import org.eclipse.emf.ecp.view.spi.table.model.VTableControl; import org.eclipse.emf.ecp.view.spi.table.model.VTableDomainModelReference; import org.eclipse.emf.ecp.view.template.model.VTViewTemplateProvider; import org.eclipse.emf.edit.command.SetCommand; import org.eclipse.emf.edit.provider.AdapterFactoryItemDelegator; import org.eclipse.emf.edit.provider.ComposedAdapterFactory; import org.eclipse.emf.edit.provider.ReflectiveItemProviderAdapterFactory; import org.eclipse.emfforms.spi.common.report.ReportService; import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedException; import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedReport; import org.eclipse.emfforms.spi.core.services.databinding.EMFFormsDatabinding; import org.eclipse.emfforms.spi.core.services.editsupport.EMFFormsEditSupport; import org.eclipse.emfforms.spi.core.services.label.EMFFormsLabelProvider; import org.eclipse.jface.action.Action; import org.eclipse.jface.databinding.swt.WidgetProperties; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Label; import org.osgi.framework.BundleContext; import org.osgi.framework.FrameworkUtil; import org.osgi.framework.ServiceReference; /** * @author jfaltermeier * */ public class TableDetailViewControlSWTRenderer extends SimpleControlSWTControlSWTRenderer { /** * @author Jonas * */ private final class CreateNewElementHandler implements SelectionListener { private final EObject eObject; private final EStructuralFeature structuralFeature; /** * @param eObject * @param structuralFeature */ private CreateNewElementHandler(EObject eObject, EStructuralFeature structuralFeature) { this.eObject = eObject; this.structuralFeature = structuralFeature; } @Override public void widgetSelected(SelectionEvent e) { final VView detailView = VViewFactory.eINSTANCE.createView(); final VTableControl tableControl = (VTableControl) eObject; if (tableControl.getDomainModelReference() == null) { MessageDialog.openInformation(Display.getDefault().getActiveShell(), "Set Domain Model Reference", //$NON-NLS-1$ "Please set a Domain Model Reference first."); //$NON-NLS-1$ return; } final VTableDomainModelReference domainModelReference = (VTableDomainModelReference) tableControl .getDomainModelReference(); EReference ref = null; if (domainModelReference.getDomainModelReference() == null) { ref = (EReference) domainModelReference.getDomainModelEFeature(); } else { IValueProperty valueProperty; try { valueProperty = org.eclipse.emf.ecp.view.internal.editor.controls.Activator.getDefault() .getEMFFormsDatabinding() .getValueProperty(domainModelReference, getViewModelContext().getDomainModel()); } catch (final DatabindingFailedException ex) { Activator.getDefault().getReportService().report(new DatabindingFailedReport(ex)); return; } final EStructuralFeature feature = (EStructuralFeature) valueProperty.getValueType(); if (EReference.class.isInstance(feature)) { ref = EReference.class.cast(feature); } } if (ref == null) { MessageDialog.openInformation(Display.getDefault().getActiveShell(), "Set Domain Model Reference", //$NON-NLS-1$ "Please set a Domain Model Reference first."); //$NON-NLS-1$ return; } detailView.setRootEClass(ref.getEReferenceType()); final Command setCommand = SetCommand.create(getEditingDomain(eObject), eObject, structuralFeature, detailView); getEditingDomain(eObject).getCommandStack().execute(setCommand); } @Override public void widgetDefaultSelected(SelectionEvent e) { } } private static final EMFFormsDatabinding emfFormsDatabinding; private static final EMFFormsEditSupport emfFormsEditSupport; private static final EMFFormsLabelProvider emfFormsLabelProvider; private static final VTViewTemplateProvider vtViewTemplateProvider; static { final BundleContext bundleContext = FrameworkUtil.getBundle(TableDetailViewControlSWTRenderer.class) .getBundleContext(); final ServiceReference<EMFFormsDatabinding> emfFormsDatabindingServiceReference = bundleContext .getServiceReference(EMFFormsDatabinding.class); emfFormsDatabinding = bundleContext.getService(emfFormsDatabindingServiceReference); final ServiceReference<EMFFormsEditSupport> emfFormsEditSupportServiceReference = bundleContext .getServiceReference(EMFFormsEditSupport.class); emfFormsEditSupport = bundleContext.getService(emfFormsEditSupportServiceReference); final ServiceReference<EMFFormsLabelProvider> emfFormsLabelProviderServiceReference = bundleContext .getServiceReference(EMFFormsLabelProvider.class); emfFormsLabelProvider = bundleContext.getService(emfFormsLabelProviderServiceReference); final ServiceReference<VTViewTemplateProvider> vtViewTemplateProviderServiceReference = bundleContext .getServiceReference(VTViewTemplateProvider.class); vtViewTemplateProvider = bundleContext.getService(vtViewTemplateProviderServiceReference); } /** * Default constructor. * * @param vElement the view model element to be rendered * @param viewContext the view context * @param reportService The {@link ReportService} */ public TableDetailViewControlSWTRenderer(VControl vElement, ViewModelContext viewContext, ReportService reportService) { super(vElement, viewContext, reportService, emfFormsDatabinding, emfFormsLabelProvider, vtViewTemplateProvider); } private ComposedAdapterFactory composedAdapterFactory; private AdapterFactoryItemDelegator adapterFactoryItemDelegator; private Label label; private Label imageLabel; private ECPModelElementChangeListener modelElementChangeListener; private Composite labelComposite; /** * {@inheritDoc} * * @see org.eclipse.emf.ecp.view.spi.core.swt.SimpleControlSWTControlSWTRenderer#createBindings(org.eclipse.swt.widgets.Control, * org.eclipse.emf.ecore.EStructuralFeature.Setting) */ @Override protected Binding[] createBindings(Control control) throws DatabindingFailedException { final Binding[] bindings = new Binding[3]; final IObservableValue value = WidgetProperties.text().observe(label); bindings[0] = getDataBindingContext().bindValue(value, getModelValue(), new UpdateValueStrategy() { @Override public Object convert(Object value) { try { return getModelValue().getValue(); } catch (final DatabindingFailedException ex) { Activator.getDefault().getReportService().report(new DatabindingFailedReport(ex)); return null; } } }, new UpdateValueStrategy() { @Override public Object convert(Object value) { return getText(value); } }); final IObservableValue tooltipValue = WidgetProperties.tooltipText().observe(label); bindings[1] = getDataBindingContext().bindValue(tooltipValue, getModelValue(), new UpdateValueStrategy() { @Override public Object convert(Object value) { try { return getModelValue().getValue(); } catch (final DatabindingFailedException ex) { Activator.getDefault().getReportService().report(new DatabindingFailedReport(ex)); return null; } } }, new UpdateValueStrategy() { @Override public Object convert(Object value) { return getText(value); } }); final IObservableValue imageValue = WidgetProperties.image().observe(imageLabel); bindings[2] = getDataBindingContext().bindValue(imageValue, getModelValue(), new UpdateValueStrategy() { @Override public Object convert(Object value) { try { return getModelValue().getValue(); } catch (final DatabindingFailedException ex) { Activator.getDefault().getReportService().report(new DatabindingFailedReport(ex)); return null; } } }, new UpdateValueStrategy() { @Override public Object convert(Object value) { return getImage(value); } }); return bindings; } private Object getText(Object value) { final String textName = adapterFactoryItemDelegator.getText(value); return textName == null ? "" : textName; //$NON-NLS-1$ } private Object getImage(Object value) { if (value == null) { return null; } return Activator.getImage((URL) adapterFactoryItemDelegator.getImage(value)); } /** * {@inheritDoc} * * @see org.eclipse.emf.ecp.view.spi.core.swt.SimpleControlSWTControlSWTRenderer#createSWTControl(org.eclipse.swt.widgets.Composite) */ @Override protected Control createSWTControl(Composite parent) throws DatabindingFailedException { final IObservableValue observableValue = Activator.getDefault().getEMFFormsDatabinding().getObservableValue( getVElement().getDomainModelReference(), getViewModelContext().getDomainModel()); final EStructuralFeature structuralFeature = (EStructuralFeature) observableValue.getValueType(); final EObject eObject = (EObject) ((IObserving) observableValue).getObserved(); observableValue.dispose(); /* parent composite */ final Composite composite = new Composite(parent, SWT.NONE); composite.setBackground(parent.getBackground()); GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(false).spacing(0, 0).applyTo(composite); /* label composite */ labelComposite = new Composite(composite, SWT.NONE); GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.BEGINNING).applyTo(labelComposite); GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(false).applyTo(labelComposite); labelComposite.setBackground(composite.getBackground()); /* image */ imageLabel = new Label(labelComposite, SWT.NONE); imageLabel.setBackground(labelComposite.getBackground()); GridDataFactory.fillDefaults().grab(false, false).align(SWT.FILL, SWT.BEGINNING).hint(20, 20) .applyTo(imageLabel); /* text */ label = new Label(labelComposite, SWT.NONE); label.setBackground(labelComposite.getBackground()); GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.BEGINNING).applyTo(label); /* button bar */ final Composite buttonComposite = new Composite(composite, SWT.NONE); GridDataFactory.fillDefaults().grab(false, false).align(SWT.FILL, SWT.BEGINNING).applyTo(buttonComposite); GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(false).spacing(2, 0).applyTo(buttonComposite); /* delete button */ final Button deleteButton = createButtonForAction( new DeleteReferenceAction(getEditingDomain(eObject), eObject, structuralFeature, null), buttonComposite); deleteButton.addSelectionListener(new SelectionListener() { @Override public void widgetSelected(SelectionEvent e) { final Command setCommand = SetCommand.create(getEditingDomain(eObject), eObject, structuralFeature, null); getEditingDomain(eObject).getCommandStack().execute(setCommand); } @Override public void widgetDefaultSelected(SelectionEvent e) { } }); /* create button */ final Button createButton = createButtonForAction(new NewReferenceAction(getEditingDomain(eObject), eObject, structuralFeature, emfFormsEditSupport, emfFormsLabelProvider, null, getReportService(), getVElement().getDomainModelReference(), getViewModelContext().getDomainModel()), buttonComposite); createButton.addSelectionListener(new CreateNewElementHandler(eObject, structuralFeature)); /* init */ composedAdapterFactory = new ComposedAdapterFactory( new AdapterFactory[] { new ReflectiveItemProviderAdapterFactory(), new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE) }); adapterFactoryItemDelegator = new AdapterFactoryItemDelegator(composedAdapterFactory); return composite; } private Button createButtonForAction(final Action action, final Composite composite) { final Button selectButton = new Button(composite, SWT.PUSH); selectButton.setImage(Activator.getImage(action)); selectButton.setEnabled(true); selectButton.setToolTipText(action.getToolTipText()); return selectButton; } /** * {@inheritDoc} * * @see org.eclipse.emf.ecp.view.spi.core.swt.SimpleControlSWTRenderer#dispose() */ @Override protected void dispose() { composedAdapterFactory.dispose(); composedAdapterFactory = null; adapterFactoryItemDelegator = null; if (modelElementChangeListener != null) { modelElementChangeListener.remove(); } super.dispose(); } /** * {@inheritDoc} * * @see org.eclipse.emf.ecp.view.spi.core.swt.SimpleControlSWTRenderer#getUnsetText() */ @Override protected String getUnsetText() { return ""; //$NON-NLS-1$ } }