at.jku.ce.adaptivetesting.vaadin.ui.MockQuestion.java Source code

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Here is the source code for at.jku.ce.adaptivetesting.vaadin.ui.MockQuestion.java

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package at.jku.ce.adaptivetesting.vaadin.ui;

/*This file is part of the project "Reisisoft Adaptive Testing",
 * which is licenced under LGPL v3+. You may find a copy in the source,
 * or obtain one at http://www.gnu.org/licenses/lgpl-3.0-standalone.html */
import java.util.Arrays;

import at.jku.ce.adaptivetesting.core.AnswerStorage;
import at.jku.ce.adaptivetesting.core.IQuestion;
import at.jku.ce.adaptivetesting.core.LogHelper;
import at.jku.ce.adaptivetesting.xml.XmlQuestionData;

import com.vaadin.shared.ui.label.ContentMode;
import com.vaadin.ui.AbstractTextField.TextChangeEventMode;
import com.vaadin.ui.Button;
import com.vaadin.ui.Component;
import com.vaadin.ui.Label;
import com.vaadin.ui.TextArea;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;

public abstract class MockQuestion<Question extends IQuestion<T> & Component, T extends AnswerStorage>
        extends VerticalLayout implements IQuestion<T> {

    private static final long serialVersionUID = 8387557147527424813L;
    private final Question question;
    private String questionText;

    public MockQuestion(Question question) {
        this.question = question;

        TextArea textArea = new TextArea("Question text");
        textArea.setSizeFull();

        // Download the result
        Button button = new Button("Display current user's solution");

        button.setSizeFull();
        button.addClickListener(e -> {
            Window window = new Window("Current user solution");
            VerticalLayout layout = new VerticalLayout();
            layout.setMargin(true);
            window.setContent(layout);
            // Update questionText
            textArea.addTextChangeListener(ev -> questionText = ev.getText());
            textArea.setTextChangeEventMode(TextChangeEventMode.EAGER);
            Label label;
            try {
                label = new Label(toXML());
            } catch (Exception e1) {
                label = new Label(
                        "<h1>Error parsing XML</h1><p>" + e1.getMessage() + Arrays.toString(e1.getStackTrace()),
                        ContentMode.HTML);
                LogHelper.logThrowable(e1);
            }
            layout.addComponent(label);
            window.center();
            getUI().addWindow(window);
        });
        // Add components to the UI
        addComponent(textArea);
        addComponent(question);
        addComponent(button);
    }

    @Override
    public T getSolution() {
        return question.getSolution();
    }

    @Override
    public T getUserAnswer() {
        return question.getUserAnswer();
    }

    @Override
    public double checkUserAnswer() {
        return question.checkUserAnswer();
    }

    @Override
    public float getDifficulty() {
        return question.getDifficulty();
    }

    @Override
    public XmlQuestionData<T> toXMLRepresentation() {
        XmlQuestionData<T> xml = question.toXMLRepresentation();
        xml.setQuestion(questionText != null ? questionText : "");
        xml.setDataStorage(getUserAnswer());
        return xml;
    }

    @Override
    public double getMaxPoints() {
        return question.getMaxPoints();
    }

    @Override
    public String getQuestionText() {
        return questionText;
    }
}