questionpanel.java

考试系统

package gui;

import paper.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

/**
 * @author SpiritRain
 * 
 * abstract question panel
 * every question panel contains a single question
 *
 */
public abstract class QuestionPanel extends JPanel {
	protected AbstractQuestion question;
	protected JPanel jPanelAns;
	protected JTextArea jTextAreaHint;
	protected JTextArea jTextAreaQuestion;
	protected JTextField jTextFieldAnsScore;
	protected JButton jButtonHint;
	protected boolean permit;

	public QuestionPanel(boolean permit) {
		this.permit = permit;
		this.setLayout(new BorderLayout());
		
		jTextAreaHint = new JTextArea();
		jTextAreaHint.setFocusable(permit);
		JScrollPane jScrollPaneHint =
			new JScrollPane(jTextAreaHint);
			
		JScrollPane jScrollPaneQ =
			new JScrollPane(jTextAreaQuestion = new JTextArea());
		jTextAreaQuestion.setFocusable(permit);
		
		jTextFieldAnsScore = new JTextField(4);
		jTextFieldAnsScore.setEditable(permit);
		jTextFieldAnsScore.setFocusable(permit);
		
		jButtonHint = new JButton("Show Hints");
		jButtonHint.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent e) {
				setHint();
			}
		});

		jPanelAns = new JPanel();

		this.add(jScrollPaneHint, BorderLayout.NORTH);
		this.add(jScrollPaneQ, BorderLayout.CENTER);
		this.add(jPanelAns, BorderLayout.SOUTH);
	}

	protected void setQuestion(AbstractQuestion question) {
		this.question = question;
		jTextAreaQuestion.setText(question.getQuestionText());
		if (permit){
			this.jTextAreaHint.setText(question.getHint());
		}else{
			this.jTextAreaHint.setText("");
		}
	}

	protected void setHint() {
		jTextAreaHint.setText(question.getHint());
	}
	
	protected abstract AbstractQuestion createNewQuestion(int diff);
	protected abstract AbstractAnswer createNewAnswer();
	protected abstract void setAnswer(AbstractAnswer ans);
}