ca.upei.ic.timetable.client.CourseDetailController.java Source code

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Here is the source code for ca.upei.ic.timetable.client.CourseDetailController.java

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/*
 *  Copyright 2008 University of Prince Edward Island
 *
 *  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 ca.upei.ic.timetable.client;

import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.Response;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.json.client.JSONValue;

/**
 * The controller to show the course details
 * 
 * @author felix
 */
public class CourseDetailController implements ViewController {

    private ApplicationController app_;
    private CourseDetailModelView view_ = null;

    public CourseDetailController(ApplicationController controller) {
        app_ = controller;
    }

    public CourseDetailModelView getView() {
        if (view_ == null)
            view_ = new CourseDetailModelView(this);
        return view_;
    }

    /**
     * Show the details of a course in a dialog box
     * 
     * @param courseId
     */
    public void showCourseDetail(final int courseId) {

        Service.defaultInstance().cancelCourseDetailRequest();

        Service.defaultInstance().askCourseDetail(courseId, new RequestCallback() {

            public void onError(Request request, Throwable exception) {
                app_.error("Cannot get course details for course " + courseId, exception);
            }

            public void onResponseReceived(Request request, Response response) {
                try {
                    String result = response.getText();
                    JSONValue value = JSONParser.parse(result);
                    try {
                        getView().loadJSON(value);
                        getView().showAt(265, 28);
                    } catch (Exception ex) {
                        // do nothing
                    }
                } catch (Exception ex) {
                    app_.error("Cannot get course details for course " + courseId, ex);
                }
            }

        });
    }

    public void hideCourseDetail() {
        getView().hide();
    }

}