com.google.gwt.sample.mobilewebapp.client.activity.AppActivityMapper.java Source code

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Here is the source code for com.google.gwt.sample.mobilewebapp.client.activity.AppActivityMapper.java

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/*
 * Copyright 2011 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.google.gwt.sample.mobilewebapp.client.activity;

import com.google.gwt.activity.shared.AbstractActivity;
import com.google.gwt.activity.shared.Activity;
import com.google.gwt.activity.shared.ActivityMapper;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.place.shared.Place;
import com.google.gwt.sample.mobilewebapp.client.ClientFactory;
import com.google.gwt.sample.mobilewebapp.presenter.task.TaskPlace;
import com.google.gwt.sample.mobilewebapp.presenter.tasklist.TaskListPlace;
import com.google.gwt.sample.mobilewebapp.presenter.tasklist.TaskListPresenter;
import com.google.gwt.user.client.ui.AcceptsOneWidget;

/**
 * A mapping of places to activities used by this application.
 */
public class AppActivityMapper implements ActivityMapper {

    private final ClientFactory clientFactory;

    public AppActivityMapper(ClientFactory clientFactory) {
        this.clientFactory = clientFactory;
    }

    public Activity getActivity(final Place place) {
        if (place instanceof TaskListPlace) {
            // The list of tasks.
            return new AbstractActivity() {
                @Override
                public void start(AcceptsOneWidget panel, EventBus eventBus) {
                    TaskListPresenter presenter = new TaskListPresenter(clientFactory, (TaskListPlace) place);
                    presenter.start(eventBus);
                    panel.setWidget(presenter);
                }

                /*
                 * Note no call to presenter.stop(). The TaskListViews do that
                 * themselves as a side effect of setPresenter.
                 */
            };
        }

        if (place instanceof TaskPlace) {
            // Editable view of a task.
            return new TaskActivity(clientFactory, (TaskPlace) place);
        }

        return null;
    }
}