添加 'src/view/ExamView.java'

src/view/ExamView.java

@@ -0,0 +1,140 @@
+package view;
+
+import model.Question;
+import javax.swing.*;
+import javax.swing.border.EmptyBorder;
+import javax.swing.text.SimpleAttributeSet;
+import javax.swing.text.StyleConstants;
+import javax.swing.text.StyledDocument;
+import java.awt.*;
+import java.util.List;
+
+
+public class ExamView extends JPanel {
+    private final JLabel progressLabel = new JLabel(" ", SwingConstants.CENTER);
+    private final JProgressBar progressBar = new JProgressBar();
+    private final JTextPane questionPane = new JTextPane();
+    private final JRadioButton[] optionButtons = new JRadioButton[4];
+    private final ButtonGroup optionsGroup = new ButtonGroup();
+
+    private final JButton prevButton = new JButton("上一题");
+    private final JButton nextButton = new JButton("下一题");
+    private final JButton finishButton = new JButton("交卷并评分");
+
+    public ExamView() {
+        setLayout(new BorderLayout(20, 20));
+        setBorder(new EmptyBorder(20, 40, 40, 40));
+
+        // --- 顶部进度区域 ---
+        JPanel topPanel = new JPanel(new BorderLayout(0, 10));
+        progressLabel.setFont(new Font(Font.SANS_SERIF, Font.BOLD, 20));
+        topPanel.add(progressLabel, BorderLayout.NORTH);
+
+        progressBar.setPreferredSize(new Dimension(1, 15));
+        topPanel.add(progressBar, BorderLayout.CENTER);
+        add(topPanel, BorderLayout.NORTH);
+
+        // --- 中间题目区域 ---
+        questionPane.setFont(new Font(Font.SANS_SERIF, Font.BOLD, 36));
+        questionPane.setEditable(false);
+        questionPane.setFocusable(false);
+        questionPane.setOpaque(false);
+        StyledDocument doc = questionPane.getStyledDocument();
+        SimpleAttributeSet center = new SimpleAttributeSet();
+        StyleConstants.setAlignment(center, StyleConstants.ALIGN_CENTER);
+        doc.setParagraphAttributes(0, doc.getLength(), center, false);
+
+        JPanel questionWrapper = new JPanel(new BorderLayout());
+        questionWrapper.setOpaque(false);
+        questionWrapper.add(questionPane, BorderLayout.CENTER);
+        add(questionWrapper, BorderLayout.CENTER);
+
+        // --- 底部选项和导航 ---
+        JPanel southPanel = new JPanel(new BorderLayout(20, 30));
+
+        // --- 选项面板 ---
+        JPanel optionsPanel = new JPanel(new GridBagLayout());
+        optionsPanel.setOpaque(false);
+        GridBagConstraints gbcOpt = new GridBagConstraints();
+        gbcOpt.insets = new Insets(15, 80, 15, 80); // 调整选项的内外边距
+        gbcOpt.anchor = GridBagConstraints.WEST;
+
+        for (int i = 0; i < 4; i++) {
+            optionButtons[i] = new JRadioButton();
+            optionButtons[i].setFont(new Font(Font.SANS_SERIF, Font.PLAIN, 20));
+            optionButtons[i].setOpaque(false);
+            optionsGroup.add(optionButtons[i]);
+        }
+
+
+        gbcOpt.gridx = 0; gbcOpt.gridy = 0; optionsPanel.add(optionButtons[0], gbcOpt); // 位置 A
+        gbcOpt.gridx = 1; gbcOpt.gridy = 0; optionsPanel.add(optionButtons[1], gbcOpt); // 位置 B
+        gbcOpt.gridx = 0; gbcOpt.gridy = 1; optionsPanel.add(optionButtons[2], gbcOpt); // 位置 C
+        gbcOpt.gridx = 1; gbcOpt.gridy = 1; optionsPanel.add(optionButtons[3], gbcOpt); // 位置 D
+
+        JPanel optionsWrapper = new JPanel(new GridBagLayout());
+        optionsWrapper.setOpaque(false);
+        optionsWrapper.add(optionsPanel);
+        southPanel.add(optionsWrapper, BorderLayout.CENTER);
+
+        // --- 导航按钮面板 ---
+        JPanel navigationPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 30, 0));
+        prevButton.setFont(new Font(Font.SANS_SERIF, Font.PLAIN, 16));
+        nextButton.setFont(new Font(Font.SANS_SERIF, Font.PLAIN, 16));
+        finishButton.setFont(new Font(Font.SANS_SERIF, Font.BOLD, 16));
+        finishButton.putClientProperty("JButton.buttonType", "roundRect");
+
+        navigationPanel.add(prevButton);
+        navigationPanel.add(finishButton);
+        navigationPanel.add(nextButton);
+        southPanel.add(navigationPanel, BorderLayout.SOUTH);
+
+        add(southPanel, BorderLayout.SOUTH);
+    }
+
+    public void displayQuestion(Question q, int qNum, int total, int savedAnswerIndex) {
+        progressLabel.setText(String.format("第 %d 题 / 共 %d 题", qNum, total));
+        progressBar.setValue(qNum);
+        questionPane.setText(q.getQuestionText());
+
+        StyledDocument doc = questionPane.getStyledDocument();
+        SimpleAttributeSet center = new SimpleAttributeSet();
+        StyleConstants.setAlignment(center, StyleConstants.ALIGN_CENTER);
+        doc.setParagraphAttributes(0, doc.getLength(), center, false);
+
+        optionsGroup.clearSelection();
+        List<String> options = q.getOptions();
+
+        char optionLabel = 'A';
+        for (int i = 0; i < 4; i++) {
+            optionButtons[i].setText(optionLabel + ". " + options.get(i));
+            optionLabel++;
+        }
+
+        if (savedAnswerIndex != -1) {
+            optionButtons[savedAnswerIndex].setSelected(true);
+        }
+    }
+
+    public void setupForExam(int totalQuestions) {
+        progressBar.setMinimum(1);
+        progressBar.setMaximum(totalQuestions);
+    }
+
+    public void updateNavigationButtons(int qIndex, int total) {
+        prevButton.setEnabled(qIndex > 0);
+        nextButton.setEnabled(qIndex < total - 1);
+        nextButton.setText(qIndex == total - 2 ? "最后一题" : "下一题");
+    }
+
+    public int getSelectedIndex() {
+        for (int i = 0; i < 4; i++) {
+            if (optionButtons[i].isSelected()) { return i; }
+        }
+        return -1;
+    }
+
+    public JButton getPrevButton() { return prevButton; }
+    public JButton getNextButton() { return nextButton; }
+    public JButton getFinishButton() { return finishButton; }
+}