[GEF] Remove obsolete EditPartVisitor

The `EditPartVisitor` is only used within the `MenuObjectEditPart` to
refresh all other `MenuObjectEditPart`s. Rather than using a visitor, we
can simply iterate over the edit-part registry.

Author: ptziegler

org.eclipse.wb.core/src-gef/org/eclipse/wb/gef/core/EditPart.java

@@ -12,8 +12,6 @@
  *******************************************************************************/
 package org.eclipse.wb.gef.core;
 
-import org.eclipse.wb.internal.gef.core.EditPartVisitor;
-
 import org.eclipse.gef.EditPolicy;
 import org.eclipse.gef.Request;
 import org.eclipse.gef.commands.Command;
@@ -68,23 +66,6 @@ protected List<?> getModelChildren() {
 		return Collections.EMPTY_LIST;
 	}
 
-	////////////////////////////////////////////////////////////////////////////
-	//
-	// Visiting
-	//
-	////////////////////////////////////////////////////////////////////////////
-	/**
-	 * Visits this {@link EditPart} and its children using given {@link EditPartVisitor}.
-	 */
-	public final void accept(EditPartVisitor visitor) {
-		if (visitor.visit(this)) {
-			for (EditPart childPart : (List<EditPart>) getChildren()) {
-				childPart.accept(visitor);
-			}
-			visitor.endVisit(this);
-		}
-	}
-
 	////////////////////////////////////////////////////////////////////////////
 	//
 	// EditPart

org.eclipse.wb.core/src-gef/org/eclipse/wb/internal/gef/core/EditPartVisitor.java

@@ -20,7 +20,6 @@
 import org.eclipse.wb.internal.core.model.menu.IMenuObjectInfo;
 import org.eclipse.wb.internal.core.model.menu.IMenuObjectListener;
 import org.eclipse.wb.internal.core.model.menu.MenuObjectInfoUtils;
-import org.eclipse.wb.internal.gef.core.EditPartVisitor;
 import org.eclipse.wb.internal.gef.core.IActiveToolListener;
 
 import org.eclipse.gef.EditPart;
@@ -206,16 +205,11 @@ public EditPart getTargetEditPart(org.eclipse.gef.Request request) {
 				public void run() {
 					try {
 						MenuObjectInfoUtils.m_selectingObject = m_object;
-						((org.eclipse.wb.gef.core.EditPart)getViewer().getRootEditPart()).accept(new EditPartVisitor() {
-							@Override
-							public boolean visit(EditPart editPart) {
-								if (editPart instanceof MenuObjectEditPart) {
-									editPart.refresh();
-									return false;
-								}
-								return true;
+						for (EditPart editPart : getViewer().getEditPartRegistry().values()) {
+							if (editPart instanceof MenuObjectEditPart) {
+								editPart.refresh();
 							}
-						});
+						}
 					} finally {
 						MenuObjectInfoUtils.m_selectingObject = null;
 					}