show solutions

src/code/ca/bcit/comp2522/lab11/Question.java

@@ -84,6 +84,20 @@ public class Question
         return this.answers;
     }
 
+    public String getAnswersString()
+    {
+        final StringBuilder sb;
+        sb = new StringBuilder();
+
+        for (final String answer : this.answers)
+        {
+            sb.append(answer);
+            sb.append(", ");
+        }
+
+        return sb.toString();
+    }
+
     /**
      * Checks whether a user's answer is correct.
      * Matching is case-insensitive.

src/code/ca/bcit/comp2522/lab11/Quiz.java

@@ -8,6 +8,7 @@ import javafx.scene.layout.VBox;
 import javafx.stage.Stage;
 import javafx.scene.control.Label;
 import javafx.scene.control.TextField;
+import javafx.scene.control.TextArea;
 import javafx.scene.control.Button;
 import javafx.util.Duration;
 
@@ -35,21 +36,23 @@ import java.util.List;
  */
 public class Quiz extends Application
 {
-    private static final int WIDTH           = 800;
-    private static final int HEIGHT          = 600;
-    private static final int QUESTION_SPLIT  = 0;
+    private static final int WIDTH_PIXELS = 800;
+    private static final int HEIGHT_PIXELS = 600;
+    private static final int QUESTION_SPLIT_INDEX = 0;
     private static final int COUNTER_STARTER = 0;
-    private static final int ANSWER_SPLIT    = 1;
-    private static final int ONE_SECOND      = 1;
-    private static final int MIN_LENGTH      = 2;
-    private static final String DELIMITER    = "\\|";
+    private static final int ANSWER_SPLIT_INDEX = 1;
+    private static final int SECOND = 1;
+    private static final int MIN_CHAR_LENGTH = 2;
+    private static final String QUESTION_DELIMITER = "\\|";
     private static final int NUM_QUESTIONS = 10;
-    private static final int START_TIME_SECS = 90;
+    private static final int START_TIME_SECONDS = 90;
+    private static final int INDEX_OFFSET = 1;
 
     private static final Path QUIZ_FILE_PATH;
     private static final List<Question> questions;
 
-    static {
+    static
+    {
         questions = new ArrayList<>();
         QUIZ_FILE_PATH = Paths.get("data", "quiz.txt");
     }
@@ -61,6 +64,7 @@ public class Quiz extends Application
     private int correctCount;
     private int wrongCount;
     private int remainingSeconds;
+    private List<Question> wrongQuestions;
 
     private Timeline timeline;
 
@@ -93,8 +97,8 @@ public class Quiz extends Application
             while ((line = reader.readLine()) != null)
             {
                 final String[] parts;
-                parts = line.split(DELIMITER);
-                if (parts.length < MIN_LENGTH)
+                parts = line.split(QUESTION_DELIMITER);
+                if (parts.length < MIN_CHAR_LENGTH)
                 {
                     continue;
                 }
@@ -102,20 +106,18 @@ public class Quiz extends Application
                 final String questionText;
                 final String[] answers;
 
-                questionText = parts[QUESTION_SPLIT];
-                answers      = parts[ANSWER_SPLIT].split(",");
+                questionText = parts[QUESTION_SPLIT_INDEX];
+                answers = parts[ANSWER_SPLIT_INDEX].split(",");
 
                 questions.add(new Question(
                         questionText,
                         answers
                 ));
             }
-        }
-        catch (final FileNotFoundException e)
+        } catch (final FileNotFoundException e)
         {
             System.out.println("Unable to open file: " + path);
-        }
-        catch (final IOException e)
+        } catch (final IOException e)
         {
             System.out.println("Error reading file: " + path);
         }
@@ -131,7 +133,7 @@ public class Quiz extends Application
     {
         final VBox root;
         root = new VBox();
-        root.setPrefSize(WIDTH, HEIGHT);
+        root.setPrefSize(WIDTH_PIXELS, HEIGHT_PIXELS);
 
         questionLabel = new Label("Click \"Start quiz\" to begin.");
         feedbackLabel = new Label();
@@ -193,13 +195,15 @@ public class Quiz extends Application
     /**
      * getRunnable creates a Runnable
      * lambda that is used to enter an answer on button click.
+     *
      * @return Runnable to manage answer
      */
     private Runnable getRunnable()
     {
         final Runnable submitAction;
 
-        submitAction = () -> {
+        submitAction = () ->
+        {
             if (current == null)
             {
                 return;
@@ -220,10 +224,10 @@ public class Quiz extends Application
             if (current.validateAnswer(cleaned))
             {
                 correctCount++;
-            }
-            else
+            } else
             {
                 wrongCount++;
+                this.wrongQuestions.add(current);
             }
 
             currentQuestionIndex++;
@@ -239,14 +243,17 @@ public class Quiz extends Application
      */
     private void startGame()
     {
+        ((VBox) feedbackLabel.getParent()).getChildren().removeIf(node -> node instanceof TextArea);
+
         correctCount = COUNTER_STARTER;
         wrongCount = COUNTER_STARTER;
-        remainingSeconds     = START_TIME_SECS;
+        remainingSeconds = START_TIME_SECONDS;
         currentQuestionIndex = COUNTER_STARTER;
 
         feedbackLabel.setText("");
         questionLabel.setText("");
 
+        wrongQuestions = new ArrayList<>();
         quizQuestions  = new ArrayList<>(questions);
         Collections.shuffle(quizQuestions);
 
@@ -261,7 +268,8 @@ public class Quiz extends Application
         }
 
         timeline = new Timeline(
-            new KeyFrame(Duration.seconds(ONE_SECOND), event -> {
+                new KeyFrame(Duration.seconds(SECOND), event ->
+                {
                     remainingSeconds--;
                     updateStatusLabel();
 
@@ -315,7 +323,7 @@ public class Quiz extends Application
         }
 
         final int displayIndex;
-        displayIndex = Math.min(currentQuestionIndex + ONE_SECOND, quizQuestions.size());
+        displayIndex = Math.min(currentQuestionIndex + SECOND, quizQuestions.size());
 
         statusLabel.setText(
                 displayIndex + "/" + quizQuestions.size() +
@@ -340,12 +348,49 @@ public class Quiz extends Application
         current = null;
 
         final String   finalScore;
+        final TextArea solutions;
+
+        if (wrongCount > COUNTER_STARTER)
+        {
+            final StringBuilder allSolutions;
+
+            allSolutions = new StringBuilder();
+
+            for (final Question question : wrongQuestions)
+            {
+                final StringBuilder solution;
+                solution = new StringBuilder();
+
+                solution.append("Question: ");
+                solution.append(question.getQuestion());
+                solution.append("\n");
+                solution.append("Answer: ");
+                solution.append(question.getAnswersString());
+                solution.append("\n\n");
+
+                allSolutions.append(solution.toString());
+            }
+
+            solutions = new TextArea(allSolutions.toString());
+            solutions.setEditable(false);
+        }
+        else
+        {
+            solutions = null;
+        }
 
         finalScore = reason +
                      "\n\nFinal score:" +
                      "\nCorrect: " + correctCount +
                      "\nWrong:   " + wrongCount;
 
+        if (solutions != null)
+        {
+            final VBox root;
+            root = (VBox) feedbackLabel.getParent();
+            root.getChildren().add(root.getChildren().indexOf(feedbackLabel) + INDEX_OFFSET, solutions);
+        }
+
         feedbackLabel.setText(finalScore);
 
         questionLabel.setText("Game over.");