1 files changed, 103 insertions, 0 deletions
diff --git a/plugins/infra/gmfdiag/org.eclipse.papyrus.infra.gmfdiag.properties/src/org/eclipse/papyrus/infra/gmfdiag/properties/databinding/AbstractDiagramPreferencesObservableValue.java b/plugins/infra/gmfdiag/org.eclipse.papyrus.infra.gmfdiag.properties/src/org/eclipse/papyrus/infra/gmfdiag/properties/databinding/AbstractDiagramPreferencesObservableValue.java
new file mode 100644
index 00000000000..95ce8f2d3e8
--- /dev/null
+++ b/plugins/infra/gmfdiag/org.eclipse.papyrus.infra.gmfdiag.properties/src/org/eclipse/papyrus/infra/gmfdiag/properties/databinding/AbstractDiagramPreferencesObservableValue.java
@@ -0,0 +1,103 @@
+/*****************************************************************************
+ * Copyright (c) 2013 CEA LIST.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *		
+ *		CEA LIST - Initial API and implementation
+ *
+ *****************************************************************************/
+package org.eclipse.papyrus.infra.gmfdiag.properties.databinding;
+
+import org.eclipse.core.databinding.observable.value.AbstractObservableValue;
+import org.eclipse.core.databinding.observable.value.ValueDiff;
+import org.eclipse.gmf.runtime.notation.Diagram;
+import org.eclipse.jface.preference.IPreferenceStore;
+import org.eclipse.jface.util.IPropertyChangeListener;
+import org.eclipse.jface.util.PropertyChangeEvent;
+
+/**
+ * 
+ * This observable value listen the preference store to send event and refresh itself when a preferences has changed
+ * 
+ */
+public abstract class AbstractDiagramPreferencesObservableValue extends AbstractObservableValue {
+
+	/**
+	 * the name of the edited preference
+	 */
+	private String preferenceName;
+
+	/**
+	 * the edited preference store
+	 */
+	private IPreferenceStore editedPreferenceStore;
+
+	/**
+	 * the listener on the preference store used to force refresh
+	 */
+	private IPropertyChangeListener listener;
+
+	/**
+	 * 
+	 * Constructor.
+	 * 
+	 * @param diagram
+	 *        the diagram for which we re editing a preference
+	 * @param preferenceName
+	 *        the name of edited the preference
+	 */
+	public AbstractDiagramPreferencesObservableValue(final Diagram diagram, final String preferenceName, final IPreferenceStore editedPreferenceStore) {
+		this.preferenceName = preferenceName;
+		this.editedPreferenceStore = editedPreferenceStore;
+		this.editedPreferenceStore.addPropertyChangeListener(this.listener = new IPropertyChangeListener() {
+
+			public void propertyChange(final PropertyChangeEvent event) {
+				if(getEditedPreference().equals(event.getProperty())) {
+					ValueDiff diff = new ValueDiff() {
+
+						@Override
+						public Object getOldValue() {
+							return event.getOldValue();
+						}
+
+						@Override
+						public Object getNewValue() {
+							return event.getNewValue();
+						}
+					};
+					fireValueChange(diff);
+				}
+			}
+		});
+	}
+
+
+	@Override
+	public synchronized void dispose() {
+		super.dispose();
+		this.editedPreferenceStore.removePropertyChangeListener(this.listener);
+	}
+
+	/**
+	 * 
+	 * @return
+	 *         the edited preferences
+	 */
+	public final String getEditedPreference() {
+		return this.preferenceName;
+	}
+
+	/**
+	 * 
+	 * @return
+	 *         the edited preference store
+	 */
+	public final IPreferenceStore getEditedPreferenceStore() {
+		return this.editedPreferenceStore;
+	}
+}