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Package: SelectEClassWizardPage$CustomTreeContentProvider
SelectEClassWizardPage$CustomTreeContentProvider
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| SelectEClassWizardPage.CustomTreeContentProvider(SelectEClassWizardPage, AdapterFactory) |
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| inputChanged(Viewer, Object, Object) |
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2016 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.handler;
15:
16: import java.util.ArrayList;
17: import java.util.Collections;
18: import java.util.Iterator;
19: import java.util.LinkedHashSet;
20: import java.util.List;
21: import java.util.Set;
22:
23: import org.eclipse.core.resources.IFile;
24: import org.eclipse.emf.common.notify.AdapterFactory;
25: import org.eclipse.emf.common.util.URI;
26: import org.eclipse.emf.ecore.EClass;
27: import org.eclipse.emf.ecore.EObject;
28: import org.eclipse.emf.ecore.EPackage;
29: import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
30: import org.eclipse.emf.ecp.view.model.common.edit.provider.CustomReflectiveItemProviderAdapterFactory;
31: import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
32: import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
33: import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider;
34: import org.eclipse.emfforms.spi.localization.LocalizationServiceHelper;
35: import org.eclipse.jface.layout.GridDataFactory;
36: import org.eclipse.jface.viewers.IStructuredSelection;
37: import org.eclipse.jface.viewers.ITreeContentProvider;
38: import org.eclipse.jface.viewers.TreeViewer;
39: import org.eclipse.jface.viewers.Viewer;
40: import org.eclipse.jface.wizard.WizardPage;
41: import org.eclipse.swt.SWT;
42: import org.eclipse.swt.layout.GridLayout;
43: import org.eclipse.swt.widgets.Composite;
44: import org.eclipse.swt.widgets.Label;
45:
46: /**
47: * Wizard page allowing the selection of an {@link EClass} from a given container.
48: *
49: */
50: public class SelectEClassWizardPage extends WizardPage {
51: private Composite container;
52: private EPackage selectedEPackage;
53: private List<EClass> selectedEClasses;
54: private TreeViewer treeViewer;
55:
56: /** Creates a new EClass selection wizard page. */
57: public SelectEClassWizardPage() {
58: super(
59: LocalizationServiceHelper.getString(SelectEClassWizardPage.class, "_UI_SelectEClassWizardPage_page_name")); //$NON-NLS-1$
60: setTitle(
61: LocalizationServiceHelper.getString(SelectEClassWizardPage.class, "_UI_SelectEClassWizardPage_page_title")); //$NON-NLS-1$
62: setDescription(LocalizationServiceHelper.getString(SelectEClassWizardPage.class,
63: "_UI_SelectEClassWizardPage_page_description")); //$NON-NLS-1$
64: }
65:
66: @Override
67: public void createControl(Composite parent) {
68: container = new Composite(parent, SWT.NONE);
69: final GridLayout layout = new GridLayout();
70: layout.verticalSpacing = 10;
71: layout.horizontalSpacing = 5;
72: container.setLayout(layout);
73: GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).grab(true, true).applyTo(container);
74: layout.numColumns = 1;
75:
76: final Label label1 = new Label(container, SWT.NONE);
77: label1.setText("Select an EClass:"); //$NON-NLS-1$
78:
79: final ComposedAdapterFactory adapterFactory = new ComposedAdapterFactory(new AdapterFactory[] {
80: new CustomReflectiveItemProviderAdapterFactory(),
81: new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE) });
82: final AdapterFactoryLabelProvider labelProvider = new AdapterFactoryLabelProvider(adapterFactory);
83:
84: selectedEClasses = new ArrayList<EClass>();
85:
86: final int selectionMode = isMultiSelect() ? SWT.MULTI : SWT.SINGLE;
87: treeViewer = new TreeViewer(container, selectionMode | SWT.H_SCROLL | SWT.V_SCROLL);
88: treeViewer.setContentProvider(getContentProvider(adapterFactory));
89: treeViewer.setLabelProvider(labelProvider);
90: treeViewer.setInput(selectedEPackage);
91: treeViewer.addSelectionChangedListener(event -> {
92: selectedEClasses = new ArrayList<EClass>();
93: if (event.getSelection() instanceof IStructuredSelection) {
94: final IStructuredSelection selection = (IStructuredSelection) event.getSelection();
95: for (final Iterator<?> iterator = selection.iterator(); iterator.hasNext();) {
96: final Object selectedItem = iterator.next();
97: if (EClass.class.isInstance(selectedItem)) {
98: selectedEClasses.add((EClass) selectedItem);
99: setPageComplete(getErrorMessage() == null);
100: }
101: }
102: }
103: if (selectedEClasses.isEmpty()) {
104: setPageComplete(false);
105: }
106: });
107: treeViewer.expandToLevel(2);
108: GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).grab(true, true).hint(SWT.DEFAULT, 200)
109: .applyTo(treeViewer.getControl());
110: container.layout(true);
111: container.pack();
112:
113: setControl(container);
114:
115: setPageComplete(false);
116: }
117:
118: /**
119: * Returns whether multiple EClasses can be selected in the tree.
120: *
121: * @return <code>true</code> if multi selection is allowed, <code>false</code> otherwise
122: */
123: protected boolean isMultiSelect() {
124: return true;
125: }
126:
127: @Override
128: public void setVisible(boolean visible) {
129: super.setVisible(visible);
130: if (treeViewer != null && selectedEPackage != null) {
131: treeViewer.setInput(selectedEPackage);
132: treeViewer.expandToLevel(2);
133: }
134: }
135:
136: private ITreeContentProvider getContentProvider(final AdapterFactory adapterFactory) {
137: return new CustomTreeContentProvider(adapterFactory);
138: }
139:
140: /**
141: * Returns the {@link EPackage} container providing the EClasses displayed in the wizard page.
142: *
143: * @return the EPackage
144: */
145: public EPackage getSelectedEPackage() {
146: return selectedEPackage;
147: }
148:
149: /**
150: * Sets the EPackage container from which the EClasses will be selected in the wizard page.
151: *
152: * @param selectedEPackage the ePackage to set
153: */
154: public void setSelectedEPackage(EPackage selectedEPackage) {
155: this.selectedEPackage = selectedEPackage;
156: if (treeViewer != null) {
157: treeViewer.setInput(selectedEPackage);
158: }
159: if (selectedEPackage == null || selectedEPackage.getNsURI() == null || selectedEPackage.getNsURI().isEmpty()) {
160: setErrorMessage(LocalizationServiceHelper.getString(SelectEClassWizardPage.class,
161: "_UI_SelectEClassWizardPage_invalid_package_URI")); //$NON-NLS-1$
162: } else {
163: setErrorMessage(null);
164: }
165: }
166:
167: /**
168: * Sets the EClasses selected by this wizard page.
169: *
170: * @param selectedEClasses the selectedEClasses to set
171: */
172: public void setSelectedEClasses(List<EClass> selectedEClasses) {
173: this.selectedEClasses = selectedEClasses;
174: }
175:
176: /**
177: * Returns the EClasses selected by the user in the wizard page.
178: *
179: * @return the selected EClasses as a list
180: */
181: public List<EClass> getSelectedEClasses() {
182: return selectedEClasses;
183: }
184:
185: @Override
186: public boolean isPageComplete() {
187: return selectedEClasses != null && !selectedEClasses.isEmpty();
188: }
189:
190: /** Custom {@link ITreeContentProvider} for the {@link SelectEClassWizardPage}. */
191: private class CustomTreeContentProvider implements ITreeContentProvider {
192:
193: private final ResourceSetImpl resourceSet = new ResourceSetImpl();
194: private final AdapterFactory adapterFactory;
195:
196: CustomTreeContentProvider(AdapterFactory adapterFactory) {
197: this.adapterFactory = adapterFactory;
198: }
199:
200: @Override
201: public boolean hasChildren(Object element) {
202:• if (EPackage.class.isInstance(element)) {
203: return true;
204: }
205: return false;
206: }
207:
208: @Override
209: public Object getParent(Object element) {
210: return null;
211: }
212:
213: @Override
214: public Object[] getElements(Object inputElement) {
215: return getChildren(inputElement);
216: }
217:
218: @Override
219: public Object[] getChildren(Object parentElement) {
220:• if (EPackage.class.isInstance(parentElement)) {
221: final Set<Object> children = new LinkedHashSet<Object>();
222: children.addAll(EPackage.class.cast(parentElement).getESubpackages());
223:• for (final EObject obj : EPackage.class.cast(parentElement).getEClassifiers()) {
224:• if (EClass.class.isInstance(obj)) {
225: children.add(obj);
226: }
227: }
228: return children.toArray();
229: }
230:• if (IFile.class.isInstance(parentElement)) {
231: final String path = ((IFile) parentElement).getFullPath().toString();
232: final URI uri = URI.createPlatformResourceURI(path, true);
233: parentElement = resourceSet.getResource(uri, true);
234:
235: final ITreeItemContentProvider treeItemContentProvider = (ITreeItemContentProvider) adapterFactory
236: .adapt(parentElement, ITreeItemContentProvider.class);
237:• return (treeItemContentProvider != null ? treeItemContentProvider.getChildren(parentElement)
238: : Collections.EMPTY_LIST).toArray();
239: }
240: return null;
241: }
242:
243: @Override
244: public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
245: // do nothing
246: }
247:
248: @Override
249: public void dispose() {
250: // do nothing
251: }
252: }
253: }