singlechoiceitemdisplay.java

支持GUI和持久对象的联机测试系统

/*
 * SingleChoiceItemDisplay.java
 * 
 * MSE06B班张智力的实验报告
 * 
 * 2006年12月10日
 */

package olts.display;

import olts.AnswerSheet;
import java.awt.GridLayout;
import javax.swing.*;

/**
 * SingleChoiceItemDisplay类，继承了JPanel，生成显示单选题的JPanel
 */
public class SingleChoiceItemDisplay extends JPanel {

	/**
	 * jLabel，用于显示试题的题目
	 */
	private JLabel jLabel = null;

	/**
	 * JRadioButton，用于显示及接收选项A
	 */
	private JRadioButton jRadioButton = null;

	/**
	 * JRadioButton，用于显示及接收选项B
	 */
	private JRadioButton jRadioButton1 = null;

	/**
	 * JRadioButton，用于显示及接收选项C
	 */
	private JRadioButton jRadioButton2 = null;

	/**
	 * JRadioButton，用于显示及接收选项D
	 */
	private JRadioButton jRadioButton3 = null;

       /**
        * answerSheet对象，该Display的数据模型
        */
	private AnswerSheet answerSheet;

	/**
	 * parent，记录本JPanel所在的frame父容器，方便回调父容器中的响应代码。
	 */
	private MainFrame parent;

	/**
	 * This method initializes jRadioButton	
	 * 	
	 * @return javax.swing.JRadioButton	
	 */
	private JRadioButton getJRadioButton() {
		if (jRadioButton == null) {
			jRadioButton = new JRadioButton();
			jRadioButton.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
					answerSheet.setAnswer("A"); 
                    answerResponse(answerSheet.getTestId(), "A");
				}
			});
		}
		return jRadioButton;
	}

	/**
	 * This method initializes jRadioButton1	
	 * 	
	 * @return javax.swing.JRadioButton	
	 */
	private JRadioButton getJRadioButton1() {
		if (jRadioButton1 == null) {
			jRadioButton1 = new JRadioButton();
			jRadioButton1.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
					answerSheet.setAnswer("B");
                    answerResponse(answerSheet.getTestId(), "B");
				}
			});
		}
		return jRadioButton1;
	}

	/**
	 * This method initializes jRadioButton2	
	 * 	
	 * @return javax.swing.JRadioButton	
	 */
	private JRadioButton getJRadioButton2() {
		if (jRadioButton2 == null) {
			jRadioButton2 = new JRadioButton();
			jRadioButton2.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
					answerSheet.setAnswer("C");
                    answerResponse(answerSheet.getTestId(), "C");
				}
			});
		}
		return jRadioButton2;
	}

	/**
	 * This method initializes jRadioButton3	
	 * 	
	 * @return javax.swing.JRadioButton	
	 */
	private JRadioButton getJRadioButton3() {
		if (jRadioButton3 == null) {
			jRadioButton3 = new JRadioButton();
			jRadioButton3.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
					answerSheet.setAnswer("D");
                    answerResponse(answerSheet.getTestId(), "D");
				}
			});
		}
		return jRadioButton3;
	}

    private void answerResponse(int i, String s){
        parent.answerResponse(i, s);
    }

	/**
	 * This is the default constructor
	 */
	public SingleChoiceItemDisplay(AnswerSheet answerSheet, MainFrame jf) {
		super();
		this.answerSheet = answerSheet;
        this.parent = jf;
		initialize();
	}
  
	/**
	 * This method initializes this
	 * 
	 * @return void
	 */
	private void initialize() {
		jLabel = new JLabel();
		String temp[] = answerSheet.getItem().content.split("/");
		jLabel.setText(answerSheet.getTestId() + ". " + temp[0] + "(" + answerSheet.getScore() + "分)");
		GridLayout gridLayout = new GridLayout();
		gridLayout.setRows(5);
		gridLayout.setHgap(1);
		gridLayout.setVgap(1);
		gridLayout.setColumns(1);
		this.setLayout(gridLayout);
		this.setSize(400, 200);
		this.setBorder(javax.swing.BorderFactory.createEtchedBorder(javax.swing.border.EtchedBorder.LOWERED));
		ButtonGroup group = new ButtonGroup();
		group.add(getJRadioButton());
		group.add(getJRadioButton1());
		group.add(getJRadioButton2());
		group.add(getJRadioButton3());
		jRadioButton.setText("A. " + temp[1]);
		jRadioButton1.setText("B. " + temp[2]);
		jRadioButton2.setText("C. " + temp[3]);
		jRadioButton3.setText("D. " + temp[4]);
		this.add(jLabel, null);
		this.add(getJRadioButton(), null);
		this.add(getJRadioButton1(), null);
		this.add(getJRadioButton2(), null);
		this.add(getJRadioButton3(), null);
	}

}  //  @jve:decl-index=0:visual-constraint="10,10"