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1 /*******************************************************************************
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2 * Copyright (c) 2007 Matthew Hall and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * Matthew Hall - initial API and implementation (bug 207844)
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10 * IBM Corporation - initial API and implementation
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11 * Brad Reynolds - initial API and implementation
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12 * Matthew Hall - bug 212235
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13 *******************************************************************************/
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14 module org.eclipse.jface.internal.databinding.swt.ShellObservableValue;
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15
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16 import java.lang.all;
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17
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18 import org.eclipse.core.databinding.observable.Diffs;
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19 import org.eclipse.core.databinding.observable.Realm;
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20 import org.eclipse.core.databinding.observable.value.IObservableValue;
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21 import org.eclipse.jface.internal.databinding.provisional.swt.AbstractSWTObservableValue;
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22 import org.eclipse.swt.widgets.Shell;
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23
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24 /**
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25 * An {@link IObservableValue} that tracks the text of a Shell.
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26 *
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27 * @since 1.2
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28 */
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29 public class ShellObservableValue : AbstractSWTObservableValue {
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30
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31 private final Shell shell;
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32
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33 /**
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34 * Constructs a ShellObservableValue which tracks the text of the given
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35 * Shell.
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36 *
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37 * @param shell
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38 * the shell to track
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39 */
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40 public this(Shell shell) {
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41 super(shell);
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42 this.shell = shell;
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43 }
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44
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45 /**
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46 * Constructs a ShellObservableValue belonging to the given realm, which
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47 * tracks the text of the given shell.
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48 *
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49 * @param realm
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50 * the realm of the constructed observable
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51 * @param shell
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52 * the shell to track
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53 */
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54 public this(Realm realm, Shell shell) {
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55 super(realm, shell);
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56 this.shell = shell;
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57 }
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58
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59 protected void doSetValue(Object value) {
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60 String oldValue = shell.getText();
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61 String newValue = value is null ? "" : value.toString(); //$NON-NLS-1$
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62 shell.setText(newValue);
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63
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64 if (!newValue.opEquals(oldValue)) {
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65 fireValueChange(Diffs.createValueDiff(oldValue, newValue));
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66 }
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67 }
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68
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69 protected Object doGetValue() {
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70 return shell.getText();
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71 }
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72
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73 public Object getValueType() {
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74 return String.classinfo;
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75 }
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76 }
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