es.ugr.rodgom.ludiuca.client.profesor.Courses.java Source code

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/*******************************************************************************
 * Ludiuca
 *
 * Copyright (C) (c) 2015 Ludiuca
 *
 * 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 es.ugr.rodgom.ludiuca.client.profesor;

import java.util.ArrayList;
import java.util.List;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.logical.shared.SelectionEvent;
import com.google.gwt.event.logical.shared.SelectionHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Tree;
import com.google.gwt.user.client.ui.TreeItem;

import es.ugr.rodgom.ludiuca.client.CourseList;
import es.ugr.rodgom.ludiuca.client.MessageService;
import es.ugr.rodgom.ludiuca.client.MessageServiceAsync;
import es.ugr.rodgom.ludiuca.client.StudentList;
import es.ugr.rodgom.ludiuca.shared.Course;

/**
 * A tree displaying a set of email folders.
 */
public class Courses extends Composite {

    /**
     * Specifies the images that will be bundled for this Composite and specify
     * that tree's images should also be included in the same bundle.
     */
    /*
     * public interface Images extends Tree.Resources { ImageResource clase();
     * 
     * @Override
     * 
     * @Source("noimage.png") ImageResource treeLeaf(); }
     */

    private Tree tree;
    private MessageServiceAsync messageService = GWT.create(MessageService.class);
    private List<Course> coursesList;
    private int idSelectedCourse;

    public Courses() {
        // Images images = GWT.create(Images.class);
        this.coursesList = new ArrayList<Course>();
        obtenerMisGrupos(Context.getTeacher().getId());
        tree = new Tree();

        initWidget(tree);
        tree.addSelectionHandler(new SelectionHandler<TreeItem>() {
            @Override
            public void onSelection(SelectionEvent<TreeItem> event) {
                GWT.log("Seleccionado un elemento");
                GWT.log("Antes de getselectedItem");
                TreeItem item = event.getSelectedItem();
                GWT.log("Antes de getparentItem");
                String itemText = item.getText();
                int indexCourse = getIndexCourse(itemText);
                GWT.log("Antes de id del curso");
                setIdSelectedCourse(coursesList.get(indexCourse).getId());
                GWT.log("Id del curso: " + coursesList.get(indexCourse).getId());
                updateSelectedItem();
            }
        });
        Context.setCourses(this);
    }

    private void obtenerMisGrupos(String idTeacher) {

        AsyncCallback<CourseList> callback = new AsyncCallback<CourseList>() {
            public void onFailure(Throwable caught) {
                // TODO: Do something with errors.
                Window.alert("ERROR");
            }

            public void onSuccess(CourseList result) {
                setList(result.getList());

            }
        };
        messageService.getCourses(idTeacher, callback);
    }

    public void setList(List<Course> coursesList) {
        this.coursesList = coursesList;
        Context.setCoursesList(coursesList);
        for (Course i : this.coursesList) {
            tree.addTextItem(i.getName());
        }
    }

    public List<Course> getCoursesList() {
        return this.coursesList;
    }

    public void setCoursesList(List<Course> coursesList) {
        this.coursesList = coursesList;
    }

    public int getIdSelectedCourse() {
        return idSelectedCourse;
    }

    public void setIdSelectedCourse(int idSelectedCourse) {
        Context.setCourseId(idSelectedCourse);
        this.idSelectedCourse = idSelectedCourse;
    }

    public void updateSelectedItem() {
        AsyncCallback<StudentList> callback = new AsyncCallback<StudentList>() {
            public void onFailure(Throwable caught) {
                Window.alert("ERROR");
            }

            public void onSuccess(StudentList result) {
                CentralPan centralPan = Context.getCentralPan();
                centralPan.setStudentList(result);
                centralPan.setTextHeader();
                centralPan.deck.showWidget(Context.MYCOURSES);
                Context.setCentralPan(centralPan);

            }
        };
        messageService.getStudents(getIdSelectedCourse(), callback);
        Context.getCentralPan().unselectAllRows();
    }

    public int getIndexCourse(String itemText) {

        for (int i = 0; i < tree.getItemCount(); i++) {
            if (itemText.equals(coursesList.get(i).getName())) {
                return i;
            }
        }
        return -1;
    }
}