Added leap year practice TODO change buttons for this?

lib/pages/practice/PracticePage.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:ohthatsa/pages/practice/PracticeSetup.dart';
 import 'package:ohthatsa/pages/practice/PracticeThing.dart';
 import 'package:ohthatsa/pages/practice/PracticeThingCentury.dart';
+import 'package:ohthatsa/pages/practice/PracticeThingLeap.dart';
 import 'package:ohthatsa/pages/practice/PracticeThingMonth.dart';
 import 'package:ohthatsa/AppDrawer.dart';
 import 'package:ohthatsa/pages/practice/PracticeType.dart';
@@ -39,6 +40,10 @@ class _PracticeState extends State<PracticePage> {
         this.practiceThing = PracticeThingCentury();
         break;
       }
+      case (PracticeType.leap): {
+        this.practiceThing = PracticeThingLeap();
+        break;
+      }
       default: {
         //
       }

lib/pages/practice/PracticeSetupPage.dart

@@ -112,7 +112,13 @@ class _PracticeSetupState extends State<PracticeSetupPage> {
                         child: Text("Leap"),
                         color: Colors.blue,
                         textColor: Colors.white,
-                        onPressed: () {},
+                        onPressed: () {
+                          Navigator.pushNamed(
+                              context,
+                              '/practice/practice',
+                              arguments: PracticeSetup(_count, _showCorrect, PracticeType.leap)
+                          );
+                        },
                       ),
                       Text("80%", textAlign: TextAlign.center, style: TextStyle(fontSize: 25)),
                       Text("70%", textAlign: TextAlign.center, style: TextStyle(fontSize: 25)),

lib/pages/practice/PracticeThingLeap.dart

@@ -0,0 +1,84 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/src/widgets/text.dart';
+import 'package:ohthatsa/pages/practice/PracticeAnswer.dart';
+import 'package:ohthatsa/pages/practice/PracticeThing.dart';
+import 'package:ohthatsa/pages/practice/PracticeType.dart';
+import 'package:ohthatsa/util/DayCalculator.dart';
+
+class PracticeThingLeap extends PracticeThing {
+  int current;
+
+  PracticeThingLeap(){
+    next();
+  }
+
+  @override
+  bool answer(int answer) {
+    answers.add(PracticeAnswer(current, answer, PracticeType.month));
+    final correctAnswer = DayCalculator.isLeapYear(current);
+    return (answer != 0) == correctAnswer;
+  }
+
+  @override
+  void next() {
+    current = random.nextInt(10000);
+  }
+
+  List<bool> getBoolAnswers(){
+    return answers.map((answer) =>
+      (answer.answer != 0) == DayCalculator.isLeapYear(answer.question)
+    ).toList();
+  }
+
+  Text getAppBarTitleText(){
+    return Text("Practicing Leap Years");
+  }
+
+  Text getCurrentQuestionText(){
+    return Text(
+        current.toString(),
+        style: TextStyle(
+            fontSize: 30
+        )
+    );
+  }
+
+  Text getLastAnswerText(bool showCorrect){
+    String text = "-";
+    Color color = Colors.red;
+    if(answers.length >= 1){
+      final answer = answers[answers.length - 1];
+      final correctAnswer = DayCalculator.isLeapYear(answer.question);
+      text = answer.question.toString() + (showCorrect ? ": $correctAnswer" : "");
+      if((answer.answer != 0) == correctAnswer){
+        color = Colors.green;
+      }
+    }
+    return Text(
+        text,
+        style: TextStyle(
+            fontSize: 15,
+            color: color
+        )
+    );
+  }
+  Text getSecondLastAnswerText(bool showCorrect){
+    String text = "-";
+    Color color = Colors.red;
+    if(answers.length >= 2){
+      final answer = answers[answers.length - 2];
+      final correctAnswer = DayCalculator.isLeapYear(answer.question);
+      text = answer.question.toString() + (showCorrect ? ": $correctAnswer" : "");
+      if((answer.answer != 0) == correctAnswer){
+        color = Colors.green;
+      }
+    }
+    return Text(
+        text,
+        style: TextStyle(
+            fontSize: 10,
+            color: color
+        )
+    );
+  }
+}

lib/pages/practice/PracticeType.dart

@@ -1,6 +1,6 @@
 enum PracticeType {
   month,
   century,
-  year,
+  leap,
   all
 }