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: * Alexandra Buzila - 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.value.IObservableValue; import org.eclipse.emf.common.notify.AdapterFactory; import org.eclipse.emf.common.notify.Notification; import org.eclipse.emf.ecore.EObject; 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.template.model.VTViewTemplateProvider; 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.label.EMFFormsLabelProvider; import org.eclipse.jface.databinding.swt.WidgetProperties; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.swt.SWT; 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 Alexandra Buzila * */ public class ControlRootEClassControl2SWTRenderer extends SimpleControlSWTControlSWTRenderer { private static final EMFFormsDatabinding emfFormsDatabinding; private static final EMFFormsLabelProvider emfFormsLabelProvider; private static final VTViewTemplateProvider vtViewTemplateProvider; static { final BundleContext bundleContext = FrameworkUtil.getBundle(ControlRootEClassControl2SWTRenderer.class) .getBundleContext(); final ServiceReference<EMFFormsDatabinding> emfFormsDatabindingServiceReference = bundleContext .getServiceReference(EMFFormsDatabinding.class); emfFormsDatabinding = bundleContext.getService(emfFormsDatabindingServiceReference); 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 ControlRootEClassControl2SWTRenderer(VControl vElement, ViewModelContext viewContext, ReportService reportService) { super(vElement, viewContext, reportService, emfFormsDatabinding, emfFormsLabelProvider, vtViewTemplateProvider); } private Composite labelComposite; private Label label; private ComposedAdapterFactory composedAdapterFactory; private AdapterFactoryItemDelegator adapterFactoryItemDelegator; private Label imageLabel; private ECPModelElementChangeListener modelElementChangeListener; /** * {@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) { getReportService().report(new DatabindingFailedReport(ex)); return null; } } }, new UpdateValueStrategy() { @Override public Object convert(Object value) { updateChangeListener((EObject) 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 getImage(Object value) { return Activator.getImage((URL) adapterFactoryItemDelegator.getImage(value)); } private Object getText(Object value) { final String textName = adapterFactoryItemDelegator.getText(value); return textName == null ? "" : textName; //$NON-NLS-1$ } private void updateChangeListener(final EObject value) { if (modelElementChangeListener != null) { if (modelElementChangeListener.getTarget().equals(value)) { return; } modelElementChangeListener.remove(); modelElementChangeListener = null; } modelElementChangeListener = new ECPModelElementChangeListener(value) { @Override public void onChange(Notification notification) { Display.getDefault().syncExec(new Runnable() { @Override public void run() { getDataBindingContext().updateTargets(); labelComposite.layout(); } }); } }; } /** * {@inheritDoc} * * @see org.eclipse.emf.ecp.view.spi.core.swt.SimpleControlSWTControlSWTRenderer#createSWTControl(org.eclipse.swt.widgets.Composite) */ @Override protected Control createSWTControl(Composite parent2) { final Composite composite2 = new Composite(parent2, SWT.NONE); composite2.setBackground(parent2.getBackground()); GridLayoutFactory.fillDefaults().numColumns(1).spacing(0, 0).equalWidth(false).applyTo(composite2); labelComposite = new Composite(composite2, SWT.NONE); GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.BEGINNING).applyTo(labelComposite); GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(false).applyTo(labelComposite); labelComposite.setBackground(composite2.getBackground()); // create labels imageLabel = new Label(labelComposite, SWT.NONE); imageLabel.setBackground(labelComposite.getBackground()); label = new Label(labelComposite, SWT.NONE); label.setBackground(labelComposite.getBackground()); GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.BEGINNING).applyTo(label); GridDataFactory.fillDefaults().grab(false, false).align(SWT.FILL, SWT.BEGINNING).hint(20, 20) .applyTo(imageLabel); composedAdapterFactory = new ComposedAdapterFactory( new AdapterFactory[] { new ReflectiveItemProviderAdapterFactory(), new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE) }); adapterFactoryItemDelegator = new AdapterFactoryItemDelegator(composedAdapterFactory); return composite2; } /** * {@inheritDoc} * * @see org.eclipse.emf.ecp.view.spi.core.swt.SimpleControlSWTRenderer#getUnsetText() */ @Override protected String getUnsetText() { return "Not set"; //$NON-NLS-1$ } @Override public void dispose() { composedAdapterFactory.dispose(); if (modelElementChangeListener != null) { modelElementChangeListener.remove(); } label.dispose(); super.dispose(); } }