1 files changed, 58 insertions, 0 deletions
diff --git a/plugins/infra/gmfdiag/org.eclipse.papyrus.infra.gmfdiag.menu/src/org/eclipse/papyrus/infra/gmfdiag/menu/handlers/ToggleCanonicalHandler.java b/plugins/infra/gmfdiag/org.eclipse.papyrus.infra.gmfdiag.menu/src/org/eclipse/papyrus/infra/gmfdiag/menu/handlers/ToggleCanonicalHandler.java
new file mode 100644
index 00000000000..281b76beea8
--- /dev/null
+++ b/plugins/infra/gmfdiag/org.eclipse.papyrus.infra.gmfdiag.menu/src/org/eclipse/papyrus/infra/gmfdiag/menu/handlers/ToggleCanonicalHandler.java
@@ -0,0 +1,58 @@
+/*****************************************************************************
+ * Copyright (c) 2015 Christian W. Damus and others.
+ * 
+ * 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:
+ *   Christian W. Damus - Initial API and implementation
+ *   
+ *****************************************************************************/
+
+package org.eclipse.papyrus.infra.gmfdiag.menu.handlers;
+
+import static org.eclipse.papyrus.infra.gmfdiag.common.utils.DiagramEditPartsUtil.isCanonical;
+
+import java.util.Collection;
+
+import org.eclipse.gef.commands.Command;
+import org.eclipse.gef.commands.UnexecutableCommand;
+import org.eclipse.gmf.runtime.common.core.command.ICommand;
+import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy;
+import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
+import org.eclipse.gmf.runtime.emf.commands.core.command.CompositeTransactionalCommand;
+import org.eclipse.papyrus.infra.gmfdiag.common.commands.SetCanonicalCommand;
+
+/**
+ * Handler for the toggle-canonical command.
+ */
+public class ToggleCanonicalHandler extends AbstractGraphicalCommandHandler {
+
+	public ToggleCanonicalHandler() {
+		super();
+	}
+
+	@Override
+	protected Command getCommand() {
+		Command result;
+		final Collection<? extends IGraphicalEditPart> selection = getSelectedElements();
+
+		if (selection.isEmpty()) {
+			result = UnexecutableCommand.INSTANCE;
+		} else {
+			ICommand command = new CompositeTransactionalCommand(getEditingDomain(), "Toggle Synchronize with Model");
+
+			for (final IGraphicalEditPart editPart : getSelectedElements()) {
+				if (editPart.getNotationView() != null) {
+					command = command.compose(new SetCanonicalCommand(getEditingDomain(), editPart.getNotationView(), !isCanonical(editPart)));
+				}
+			}
+
+			result = new ICommandProxy(command.reduce());
+		}
+
+		return result;
+	}
+}