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EReferenceLabelControlSWTRenderer$5
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1: /*******************************************************************************
2: * Copyright (c) 2011-2014 EclipseSource Muenchen GmbH and others.
3: *
4: * All rights reserved. This program and the accompanying materials
5: * are made available under the terms of the Eclipse Public License 2.0
6: * which accompanies this distribution, and is available at
7: * https://www.eclipse.org/legal/epl-2.0/
8: *
9: * SPDX-License-Identifier: EPL-2.0
10: *
11: * Contributors:
12: * Alexandra Buzila - initial API and implementation
13: ******************************************************************************/
14: package org.eclipse.emf.ecp.view.internal.editor.controls;
15:
16: import org.eclipse.core.databinding.Binding;
17: import org.eclipse.core.databinding.UpdateValueStrategy;
18: import org.eclipse.core.databinding.observable.value.IObservableValue;
19: import org.eclipse.emf.common.notify.AdapterFactory;
20: import org.eclipse.emf.common.notify.Notification;
21: import org.eclipse.emf.ecore.EObject;
22: import org.eclipse.emf.ecp.edit.internal.swt.SWTImageHelper;
23: import org.eclipse.emf.ecp.edit.spi.util.ECPModelElementChangeListener;
24: import org.eclipse.emf.ecp.view.spi.context.ViewModelContext;
25: import org.eclipse.emf.ecp.view.spi.core.swt.SimpleControlSWTControlSWTRenderer;
26: import org.eclipse.emf.ecp.view.spi.model.VControl;
27: import org.eclipse.emf.ecp.view.template.model.VTViewTemplateProvider;
28: import org.eclipse.emf.edit.provider.AdapterFactoryItemDelegator;
29: import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
30: import org.eclipse.emf.edit.provider.ReflectiveItemProviderAdapterFactory;
31: import org.eclipse.emfforms.spi.common.report.ReportService;
32: import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedException;
33: import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedReport;
34: import org.eclipse.emfforms.spi.core.services.databinding.EMFFormsDatabinding;
35: import org.eclipse.emfforms.spi.core.services.label.EMFFormsLabelProvider;
36: import org.eclipse.jface.databinding.swt.typed.WidgetProperties;
37: import org.eclipse.jface.layout.GridDataFactory;
38: import org.eclipse.jface.layout.GridLayoutFactory;
39: import org.eclipse.swt.SWT;
40: import org.eclipse.swt.widgets.Composite;
41: import org.eclipse.swt.widgets.Control;
42: import org.eclipse.swt.widgets.Display;
43: import org.eclipse.swt.widgets.Label;
44: import org.osgi.framework.BundleContext;
45: import org.osgi.framework.FrameworkUtil;
46: import org.osgi.framework.ServiceReference;
47:
48: /**
49: * @author Alexandra Buzila
50: *
51: */
52: public class EReferenceLabelControlSWTRenderer extends SimpleControlSWTControlSWTRenderer {
53:
54: private static final EMFFormsDatabinding EMFFORMS_DATABINDING;
55: private static final EMFFormsLabelProvider EMFFORMS_LABELPROVIDER;
56: private static final VTViewTemplateProvider VT_VIEW_TEMPLATEPROVIDER;
57:
58: static {
59: final BundleContext bundleContext = FrameworkUtil.getBundle(EReferenceLabelControlSWTRenderer.class)
60: .getBundleContext();
61: final ServiceReference<EMFFormsDatabinding> emfFormsDatabindingServiceReference = bundleContext
62: .getServiceReference(EMFFormsDatabinding.class);
63: EMFFORMS_DATABINDING = bundleContext.getService(emfFormsDatabindingServiceReference);
64: final ServiceReference<EMFFormsLabelProvider> emfFormsLabelProviderServiceReference = bundleContext
65: .getServiceReference(EMFFormsLabelProvider.class);
66: EMFFORMS_LABELPROVIDER = bundleContext.getService(emfFormsLabelProviderServiceReference);
67: final ServiceReference<VTViewTemplateProvider> vtViewTemplateProviderServiceReference = bundleContext
68: .getServiceReference(VTViewTemplateProvider.class);
69: VT_VIEW_TEMPLATEPROVIDER = bundleContext.getService(vtViewTemplateProviderServiceReference);
70: }
71:
72: /**
73: * Default constructor.
74: *
75: * @param vElement the view model element to be rendered
76: * @param viewContext the view context
77: * @param reportService The {@link ReportService}
78: */
79: public EReferenceLabelControlSWTRenderer(VControl vElement, ViewModelContext viewContext,
80: ReportService reportService) {
81: super(vElement, viewContext, reportService, EMFFORMS_DATABINDING, EMFFORMS_LABELPROVIDER,
82: VT_VIEW_TEMPLATEPROVIDER);
83: }
84:
85: private Composite labelComposite;
86: private Label label;
87: private ComposedAdapterFactory composedAdapterFactory;
88: private AdapterFactoryItemDelegator adapterFactoryItemDelegator;
89: private Label imageLabel;
90: private ECPModelElementChangeListener modelElementChangeListener;
91:
92: /**
93: * {@inheritDoc}
94: *
95: * @see org.eclipse.emf.ecp.view.spi.core.swt.SimpleControlSWTControlSWTRenderer#createBindings(org.eclipse.swt.widgets.Control,
96: * org.eclipse.emf.ecore.EStructuralFeature.Setting)
97: */
98: @Override
99: protected Binding[] createBindings(Control control) throws DatabindingFailedException {
100:
101: final Binding[] bindings = new Binding[3];
102: final IObservableValue value = WidgetProperties.text().observe(label);
103:
104: bindings[0] = getDataBindingContext().bindValue(value, getModelValue(),
105: withPreSetValidation(new UpdateValueStrategy() {
106:
107: @Override
108: public Object convert(Object value) {
109: try {
110: return getModelValue().getValue();
111: } catch (final DatabindingFailedException ex) {
112: getReportService().report(new DatabindingFailedReport(ex));
113: return null;
114: }
115: }
116: }), new UpdateValueStrategy() {
117: @Override
118: public Object convert(Object value) {
119: updateChangeListener((EObject) value);
120: return getText(value);
121: }
122: });
123: final IObservableValue tooltipValue = WidgetProperties.tooltipText().observe(label);
124: bindings[1] = getDataBindingContext().bindValue(tooltipValue, getModelValue(),
125: withPreSetValidation(new UpdateValueStrategy() {
126:
127: @Override
128: public Object convert(Object value) {
129: try {
130: return getModelValue().getValue();
131: } catch (final DatabindingFailedException ex) {
132: getReportService().report(new DatabindingFailedReport(ex));
133: return null;
134: }
135: }
136: }), new UpdateValueStrategy() {
137: @Override
138: public Object convert(Object value) {
139: return getText(value);
140: }
141: });
142:
143: final IObservableValue imageValue = WidgetProperties.image().observe(imageLabel);
144: bindings[2] = getDataBindingContext().bindValue(imageValue, getModelValue(),
145: withPreSetValidation(new UpdateValueStrategy() {
146:
147: @Override
148: public Object convert(Object value) {
149: try {
150: return getModelValue().getValue();
151: } catch (final DatabindingFailedException ex) {
152: getReportService().report(new DatabindingFailedReport(ex));
153: return null;
154: }
155: }
156: }), new UpdateValueStrategy() {
157: @Override
158: public Object convert(Object value) {
159: return getImage(value);
160: }
161: });
162:
163: return bindings;
164: }
165:
166: private Object getImage(Object value) {
167: return SWTImageHelper.getImage(adapterFactoryItemDelegator.getImage(value));
168: }
169:
170: /**
171: * Computes the label text for the referenced object.
172: *
173: * @param value The referenced object
174: * @return the label text to display
175: */
176: protected Object getText(Object value) {
177: final String textName = adapterFactoryItemDelegator.getText(value);
178: return textName == null ? "" : textName; //$NON-NLS-1$
179: }
180:
181: private void updateChangeListener(final EObject value) {
182: if (modelElementChangeListener != null) {
183: if (modelElementChangeListener.getTarget().equals(value)) {
184: return;
185: }
186: modelElementChangeListener.remove();
187: modelElementChangeListener = null;
188: }
189: if (value == null) {
190: return;
191: }
192: modelElementChangeListener = new ECPModelElementChangeListener(value) {
193:
194: @Override
195: public void onChange(Notification notification) {
196: Display.getDefault().syncExec(new Runnable() {
197:
198: @Override
199: public void run() {
200: getDataBindingContext().updateTargets();
201: labelComposite.layout();
202:
203: }
204:
205: });
206:
207: }
208: };
209:
210: }
211:
212: /**
213: * {@inheritDoc}
214: *
215: * @see org.eclipse.emf.ecp.view.spi.core.swt.SimpleControlSWTControlSWTRenderer#createSWTControl(org.eclipse.swt.widgets.Composite,
216: * org.eclipse.emf.ecore.EStructuralFeature.Setting)
217: */
218: @Override
219: protected Control createSWTControl(Composite parent2) throws DatabindingFailedException {
220: final Composite composite2 = new Composite(parent2, SWT.NONE);
221: composite2.setBackground(parent2.getBackground());
222: GridLayoutFactory.fillDefaults().numColumns(1).spacing(0, 0).equalWidth(false).applyTo(composite2);
223:
224: labelComposite = new Composite(composite2, SWT.NONE);
225: GridDataFactory.fillDefaults().grab(true, true).align(SWT.FILL, SWT.FILL).applyTo(labelComposite);
226: GridLayoutFactory.fillDefaults().numColumns(2).equalWidth(false).applyTo(labelComposite);
227: labelComposite.setBackground(composite2.getBackground());
228:
229: // create labels
230: imageLabel = new Label(labelComposite, SWT.NONE);
231: imageLabel.setBackground(labelComposite.getBackground());
232: label = new Label(labelComposite, SWT.NONE);
233: label.setBackground(labelComposite.getBackground());
234: GridDataFactory.fillDefaults().grab(true, true).align(SWT.FILL, SWT.CENTER).applyTo(label);
235: GridDataFactory.fillDefaults().grab(false, true).align(SWT.FILL, SWT.CENTER).hint(20, 20)
236: .applyTo(imageLabel);
237:
238: composedAdapterFactory = new ComposedAdapterFactory(new AdapterFactory[] {
239: new ReflectiveItemProviderAdapterFactory(),
240: new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE) });
241: adapterFactoryItemDelegator = new AdapterFactoryItemDelegator(composedAdapterFactory);
242:
243: return composite2;
244: }
245:
246: /**
247: * {@inheritDoc}
248: *
249: * @see org.eclipse.emf.ecp.view.spi.core.swt.SimpleControlSWTRenderer#getUnsetText()
250: */
251: @Override
252: protected String getUnsetText() {
253: return "Not set"; //$NON-NLS-1$
254: }
255:
256: @Override
257: public void dispose() {
258: composedAdapterFactory.dispose();
259: if (modelElementChangeListener != null) {
260: modelElementChangeListener.remove();
261: }
262: label.dispose();
263: super.dispose();
264: }
265:
266: }
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