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Package: MultiStringCellEditor$TargetToModelStrategy
MultiStringCellEditor$TargetToModelStrategy
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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: * Jonas Helming - initial API and implementation
13: *******************************************************************************/
14: package org.eclipse.emf.ecp.edit.spi.swt.table;
15:
16: import java.util.ArrayList;
17: import java.util.List;
18:
19: import org.eclipse.core.databinding.DataBindingContext;
20: import org.eclipse.core.databinding.UpdateValueStrategy;
21: import org.eclipse.core.databinding.property.value.IValueProperty;
22: import org.eclipse.emf.databinding.EMFUpdateValueStrategy;
23: import org.eclipse.emf.ecore.EStructuralFeature;
24: import org.eclipse.emf.ecp.view.spi.context.ViewModelContext;
25: import org.eclipse.jface.databinding.swt.typed.WidgetProperties;
26: import org.eclipse.jface.databinding.viewers.CellEditorProperties;
27: import org.eclipse.swt.SWT;
28: import org.eclipse.swt.graphics.Image;
29: import org.eclipse.swt.widgets.Composite;
30: import org.eclipse.swt.widgets.Text;
31:
32: /**
33: * A cell Editor to display List of Strings in a cell editor. it allows to enter a list of string using a
34: * separator (by default ";").
35: *
36: * @author Jonas Helming
37: * @since 1.14
38: *
39: */
40: public class MultiStringCellEditor extends StringBasedCellEditor {
41:
42: /**
43: * @author Jonas Helming
44: *
45: */
46: protected final class TargetToModelStrategy extends EMFUpdateValueStrategy {
47:
48: @Override
49: public Object convert(final Object value) {
50: return convertStringToList((String) value);
51: }
52:
53: }
54:
55: /**
56: * Convertes a String into a list of Strings using the separator.
57: *
58: * @param value the String to split
59: * @return the list of sub string
60: */
61: protected List<String> convertStringToList(final String value) {
62: final boolean emptyStringAtEnd = value.endsWith(getSeparator());
63: final String[] split = value.split(getSeparator());
64: final List<String> list = new ArrayList<String>();
65: for (int i = 0; i < split.length; i++) {
66: list.add(split[i]);
67: }
68: if (emptyStringAtEnd) {
69: list.add(""); //$NON-NLS-1$
70: }
71: return list;
72: }
73:
74: /**
75: * Returns the separator used to split the input string into entries of the String list.
76: *
77: * @return the separator as a String
78: */
79: protected String getSeparator() {
80: return ";"; //$NON-NLS-1$
81: }
82:
83: private EStructuralFeature eStructuralFeature;
84:
85: /**
86: * The constructor which only takes a parent composite.
87: *
88: * @param parent the {@link Composite} to use as a parent.
89: */
90: public MultiStringCellEditor(Composite parent) {
91: super(parent, SWT.NONE);
92: }
93:
94: /**
95: * A constructor which takes a parent and the style to use, the style is ignored by this cell editor.
96: *
97: * @param parent the {@link Composite} to use as a parent
98: * @param style the SWT style to set
99: */
100: public MultiStringCellEditor(Composite parent, int style) {
101: super(parent, style);
102: }
103:
104: @SuppressWarnings({ "rawtypes" })
105: @Override
106: public IValueProperty getValueProperty() {
107: return CellEditorProperties.control().value(WidgetProperties.text(SWT.FocusOut));
108: }
109:
110: @Override
111: public void instantiate(EStructuralFeature eStructuralFeature, ViewModelContext viewModelContext) {
112: super.instantiate(eStructuralFeature, viewModelContext);
113: this.eStructuralFeature = eStructuralFeature;
114: }
115:
116: @Override
117: public String getFormatedString(Object value) {
118: if (value == null) {
119: return ""; //$NON-NLS-1$
120: }
121: if (!(value instanceof List)) {
122: return ""; //$NON-NLS-1$
123: }
124:
125: @SuppressWarnings("unchecked")
126: final List<String> list = (List<String>) value;
127: String string = ""; //$NON-NLS-1$
128: int i = 0;
129: for (final String subString : list) {
130: if (i != 0) {
131: string = string + getSeparator();
132: }
133: string = string + subString;
134: i++;
135: }
136: return string;
137: }
138:
139: @Override
140: public int getColumnWidthWeight() {
141: return 50;
142: }
143:
144: @Override
145: public UpdateValueStrategy getTargetToModelStrategy(final DataBindingContext databindingContext) {
146: return withPreSetValidation(eStructuralFeature, new TargetToModelStrategy());
147: }
148:
149: @Override
150: public UpdateValueStrategy getModelToTargetStrategy(DataBindingContext databindingContext) {
151: return new EMFUpdateValueStrategy() {
152: @Override
153: public Object convert(Object value) {
154: return getFormatedString(value);
155: }
156: };
157: }
158:
159: /**
160: * returns the {@link Text} of the cell editor.
161: *
162: * @return a {@link Text}
163: */
164: protected Text getText() {
165: return text;
166: }
167:
168: @Override
169: public void setEditable(boolean editable) {
170: if (getText() != null) {
171: getText().setEditable(editable);
172: }
173: }
174:
175: @Override
176: public Image getImage(Object value) {
177: return null;
178: }
179:
180: @Override
181: public int getMinWidth() {
182: return 0;
183: }
184: }