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Package: DataTypeControl
DataTypeControl
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| DataTypeControl(VControl, ViewModelContext, ReportService, EMFFormsDatabinding, EMFFormsLabelProvider, VTViewTemplateProvider) |
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| createJFaceViewer(Composite) |
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| getUnsetText() |
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| isUnsettable() |
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2013 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: * Clemens Elflein - initial API and implementation
13: ******************************************************************************/
14: package org.eclipse.emfforms.internal.editor.ecore.controls;
15:
16: import java.util.List;
17:
18: import javax.inject.Inject;
19:
20: import org.eclipse.core.databinding.Binding;
21: import org.eclipse.core.databinding.conversion.Converter;
22: import org.eclipse.emf.databinding.EMFUpdateValueStrategy;
23: import org.eclipse.emf.ecore.EAttribute;
24: import org.eclipse.emf.ecore.EClass;
25: import org.eclipse.emf.ecore.EClassifier;
26: import org.eclipse.emf.ecore.EDataType;
27: import org.eclipse.emf.ecore.EOperation;
28: import org.eclipse.emf.ecore.EParameter;
29: import org.eclipse.emf.ecore.EReference;
30: import org.eclipse.emf.ecp.view.spi.context.ViewModelContext;
31: import org.eclipse.emf.ecp.view.spi.core.swt.SimpleControlJFaceViewerSWTRenderer;
32: import org.eclipse.emf.ecp.view.spi.model.VControl;
33: import org.eclipse.emf.ecp.view.template.model.VTViewTemplateProvider;
34: import org.eclipse.emfforms.spi.common.report.ReportService;
35: import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedException;
36: import org.eclipse.emfforms.spi.core.services.databinding.EMFFormsDatabinding;
37: import org.eclipse.emfforms.spi.core.services.label.EMFFormsLabelProvider;
38: import org.eclipse.emfforms.spi.editor.helpers.ResourceSetHelpers;
39: import org.eclipse.jface.databinding.swt.typed.WidgetProperties;
40: import org.eclipse.jface.fieldassist.AutoCompleteField;
41: import org.eclipse.jface.fieldassist.ComboContentAdapter;
42: import org.eclipse.jface.viewers.ArrayContentProvider;
43: import org.eclipse.jface.viewers.ComboViewer;
44: import org.eclipse.jface.viewers.LabelProvider;
45: import org.eclipse.jface.viewers.Viewer;
46: import org.eclipse.swt.SWT;
47: import org.eclipse.swt.widgets.Composite;
48:
49: /**
50: * A control to select the DataType for ETypedElements.
51: *
52: * This control assists the user while selecting EDataTypes.
53: * For example you can type "String" in order to select "EString"
54: *
55: */
56: public class DataTypeControl extends SimpleControlJFaceViewerSWTRenderer {
57: /**
58: * Default constructor.
59: *
60: * @param vElement the view model element to be rendered
61: * @param viewContext the view context
62: * @param reportService The {@link ReportService}
63: * @param emfFormsDatabinding The {@link EMFFormsDatabinding}
64: * @param emfFormsLabelProvider The {@link EMFFormsLabelProvider}
65: * @param vtViewTemplateProvider The {@link VTViewTemplateProvider}
66: */
67: @Inject
68: public DataTypeControl(VControl vElement, ViewModelContext viewContext, ReportService reportService,
69: EMFFormsDatabinding emfFormsDatabinding, EMFFormsLabelProvider emfFormsLabelProvider,
70: VTViewTemplateProvider vtViewTemplateProvider) {
71: super(vElement, viewContext, reportService, emfFormsDatabinding, emfFormsLabelProvider, vtViewTemplateProvider);
72: }
73:
74: @Override
75: protected String getUnsetText() {
76: return "No EDataType set!";
77: }
78:
79: @Override
80: protected Viewer createJFaceViewer(Composite parent) {
81: final ComboViewer combo = new ComboViewer(parent, SWT.DROP_DOWN);
82:
83: Class<?> type = EClassifier.class;
84: boolean includeEcorePackage = false;
85:
86:• if (getViewModelContext().getDomainModel() instanceof EAttribute) {
87: type = EDataType.class;
88: includeEcorePackage = true;
89:• } else if (getViewModelContext().getDomainModel() instanceof EReference) {
90: type = EClass.class;
91: includeEcorePackage = false;
92:• } else if (getViewModelContext().getDomainModel() instanceof EOperation) {
93: includeEcorePackage = true;
94:• } else if (getViewModelContext().getDomainModel() instanceof EParameter) {
95: includeEcorePackage = true;
96: }
97:
98: final List<?> classifiers = ResourceSetHelpers.findAllOfTypeInResourceSet(
99: getViewModelContext().getDomainModel(), type,
100: includeEcorePackage);
101:
102: combo.setLabelProvider(new LabelProvider() {
103: @Override
104: public String getText(Object element) {
105: if (element instanceof EClassifier) {
106: return ((EClassifier) element).getName();
107: }
108: return super.getText(element);
109: }
110: });
111: combo.setContentProvider(new ArrayContentProvider());
112: combo.setInput(classifiers.toArray());
113:
114: new AutoCompleteField(combo.getCombo(), new ComboContentAdapter(),
115: combo.getCombo().getItems());
116:
117: return combo;
118: }
119:
120: @Override
121: protected Binding[] createBindings(final Viewer viewer) throws DatabindingFailedException {
122: final Binding binding = getDataBindingContext().bindValue(
123: WidgetProperties.text().observe(
124: ((ComboViewer) viewer).getCombo()),
125: getModelValue(),
126: new EMFUpdateValueStrategy().setConverter(new Converter(
127: String.class, EClassifier.class) {
128: @Override
129: public Object convert(Object fromObject) {
130: // We want the result for such a request to be null, not a DataType with null name (can occur)
131: if (fromObject == null) {
132: return null;
133: }
134:
135: final Object[] classifiers = (Object[]) ((ComboViewer) viewer).getInput();
136: for (int i = 0; i < classifiers.length; i++) {
137: if (fromObject
138: .equals(((EClassifier) classifiers[i])
139: .getName())) {
140: return classifiers[i];
141: }
142: }
143:
144: // If we haven't found the DataType yet, Try adding an E to the Input and search again.
145: // So we find EString even if String was searched.
146: final String fromStringWithE = "E" + fromObject.toString();
147: for (int i = 0; i < classifiers.length; i++) {
148: if (fromStringWithE.equals(((EClassifier) classifiers[i]).getName())) {
149: return classifiers[i];
150: }
151: }
152:
153: return null;
154: }
155: }), new EMFUpdateValueStrategy().setConverter(new Converter(EClassifier.class, String.class) {
156: @Override
157: public Object convert(Object fromObject) {
158: if (fromObject == null) {
159: return "";
160: }
161: return ((EClassifier) fromObject).getName();
162: }
163: }));
164: // TODO: this update creates a nasty usability bug!
165: /*
166: * ((ComboViewer)viewer).getCombo().addFocusListener(new FocusListener() {
167: * @Override
168: * public void focusLost(FocusEvent e) {
169: * binding.updateModelToTarget();
170: * }
171: * @Override
172: * public void focusGained(FocusEvent e) {
173: * }
174: * });
175: */
176: return new Binding[] { binding };
177: }
178:
179: @Override
180: protected boolean isUnsettable() {
181: // We unset the property via databinding as soon as the input is invalid
182: return false;
183: }
184: }