1 files changed, 84 insertions, 0 deletions
diff --git a/plugins/uml/diagram/org.eclipse.papyrus.uml.diagram.common.groups/src/org/eclipse/papyrus/diagram/common/groups/preferences/OpacityFactoryHelper.java b/plugins/uml/diagram/org.eclipse.papyrus.uml.diagram.common.groups/src/org/eclipse/papyrus/diagram/common/groups/preferences/OpacityFactoryHelper.java
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--- /dev/null
+++ b/plugins/uml/diagram/org.eclipse.papyrus.uml.diagram.common.groups/src/org/eclipse/papyrus/diagram/common/groups/preferences/OpacityFactoryHelper.java
@@ -0,0 +1,84 @@
+/*****************************************************************************
+ * Copyright (c) 2011 Atos Origin.
+ *
+ *    
+ * 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:
+ *   Atos Origin - Initial API and implementation
+ *
+ *****************************************************************************/
+package org.eclipse.papyrus.diagram.common.groups.preferences;
+
+import org.eclipse.draw2d.Shape;
+import org.eclipse.jface.dialogs.DialogPage;
+import org.eclipse.jface.preference.IPreferenceStore;
+import org.eclipse.jface.util.IPropertyChangeListener;
+import org.eclipse.jface.util.PropertyChangeEvent;
+import org.eclipse.swt.widgets.Composite;
+
+/**
+ * Factory Helper used to set the opacity setting on groups ( setAlpha , listenner, preferences etc...)
+ * 
+ * @author adaussy
+ * 
+ */
+public class OpacityFactoryHelper {
+
+	/**
+	 * Get the preference group to set the opqcity
+	 * 
+	 * @param parent
+	 * @param key
+	 * @param dialogPage
+	 * @param preferenceName
+	 * @return
+	 */
+	static public OpacityGroup getOpacityGroup(Composite parent, String key, DialogPage dialogPage, String preferenceName) {
+		return new OpacityGroup(parent, key, dialogPage, preferenceName);
+	}
+
+	/**
+	 * Init the opacity preferences of a figure
+	 * 
+	 * @param preferenceName
+	 *        Name of the preferences which point to the alpha preference
+	 * @param store
+	 *        Preference Store
+	 * @param figure
+	 *        Figure on which the alpha setting has to be made
+	 */
+	static public void initOpacityPreferences(final String preferenceName, final IPreferenceStore store, final Shape figure) {
+		Integer defaultAlpha = getStoredValueOfOpacity(preferenceName, store);
+		figure.setAlpha(defaultAlpha);
+		store.addPropertyChangeListener(new IPropertyChangeListener() {
+
+			public void propertyChange(PropertyChangeEvent event) {
+				if(preferenceName.equals(event.getProperty())) {
+					if(figure != null) {
+						figure.setAlpha(store.getInt(preferenceName));
+					}
+				}
+			}
+		});
+	}
+
+	/**
+	 * Get the store value of the alpha setting
+	 * 
+	 * @param preferenceName
+	 *        name of the preference
+	 * @param store
+	 *        Preference store
+	 * @return
+	 */
+	static public Integer getStoredValueOfOpacity(String preferenceName, IPreferenceStore store) {
+		return new Integer(store.getInt(preferenceName));
+	}
+
+
+
+}