Header selection is now based on the active Place

java/com.sap.sse.gwt/src/com/sap/sse/gwt/client/mvp/AbstractMvpEntryPoint.java

@@ -11,6 +11,7 @@ import com.google.web.bindery.event.shared.EventBus;
 import com.sap.sse.gwt.client.AbstractEntryPoint;
 import com.sap.sse.gwt.client.StringMessages;
 import com.sap.sse.gwt.client.mvp.impl.ActivityMapperRegistry;
+import com.sap.sse.gwt.client.mvp.impl.CustomActivityManager;
 
 /**
  * Subclasses implement their {@link EntryPoint#onModuleLoad()} by delegating to
@@ -46,7 +47,7 @@ public abstract class AbstractMvpEntryPoint<S extends StringMessages> extends Ab
             activityMapperRegistry.addActivityMapper(activityMapper);
         }
         EventBus eventBus = clientFactory.getEventBus();
-        ActivityManager activityManager = new ActivityManager(activityMapperRegistry, eventBus);
+        ActivityManager activityManager = new CustomActivityManager(activityMapperRegistry, eventBus);
         activityManager.setDisplay(clientFactory.getContent());
 
         // Start PlaceHistoryHandler with our PlaceHistoryMapper

java/com.sap.sse.gwt/src/com/sap/sse/gwt/client/mvp/PlaceChangedEvent.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2010 Google Inc.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.sap.sse.gwt.client.mvp;
+
+import com.google.gwt.event.shared.EventHandler;
+import com.google.gwt.event.shared.GwtEvent;
+import com.google.gwt.place.shared.Place;
+
+/**
+ * Event thrown after the place changed.
+ */
+public class PlaceChangedEvent extends GwtEvent<PlaceChangedEvent.Handler> {
+
+  /**
+   * Implemented by handlers of PlaceChangedEvent.
+   */
+  public interface Handler extends EventHandler {
+    /**
+     * Called when a {@link PlaceChangedEvent} is fired.
+     *
+     * @param event the {@link PlaceChangedEvent}
+     */
+    void onPlaceChanged(PlaceChangedEvent event);
+  }
+
+  /**
+   * A singleton instance of Type&lt;Handler&gt;.
+   */
+  public static final Type<Handler> TYPE = new Type<Handler>();
+
+  private final Place newPlace;
+
+  /**
+   * Constructs a PlaceChangedEvent for the given {@link Place}.
+   *
+   * @param newPlace a {@link Place} instance
+   */
+  public PlaceChangedEvent(Place newPlace) {
+    this.newPlace = newPlace;
+  }
+
+  @Override
+  public Type<Handler> getAssociatedType() {
+    return TYPE;
+  }
+
+  /**
+   * Return the new {@link Place}.
+   *
+   * @return a {@link Place} instance
+   */
+  public Place getNewPlace() {
+    return newPlace;
+  }
+
+  @Override
+  protected void dispatch(Handler handler) {
+    handler.onPlaceChanged(this);
+  }
+}

java/com.sap.sse.gwt/src/com/sap/sse/gwt/client/mvp/impl/CustomActivityManager.java

@@ -0,0 +1,24 @@
+package com.sap.sse.gwt.client.mvp.impl;
+
+import com.google.gwt.activity.shared.ActivityManager;
+import com.google.gwt.activity.shared.ActivityMapper;
+import com.google.gwt.place.shared.PlaceChangeEvent;
+import com.google.web.bindery.event.shared.EventBus;
+import com.sap.sse.gwt.client.mvp.PlaceChangedEvent;
+
+public class CustomActivityManager extends ActivityManager {
+
+    private EventBus eventBus;
+
+    public CustomActivityManager(ActivityMapper mapper, EventBus eventBus) {
+        super(mapper, eventBus);
+        this.eventBus = eventBus;
+    }
+    
+    @Override
+    public void onPlaceChange(PlaceChangeEvent event) {
+        super.onPlaceChange(event);
+        eventBus.fireEvent(new PlaceChangedEvent(event.getNewPlace()));
+    }
+
+}