Added century practice

lib/pages/practice/PracticePage.dart

@@ -1,6 +1,7 @@
 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/PracticeThingMonth.dart';
 import 'package:ohthatsa/AppDrawer.dart';
 import 'package:ohthatsa/pages/practice/PracticeType.dart';
@@ -34,6 +35,10 @@ class _PracticeState extends State<PracticePage> {
         this.practiceThing = PracticeThingMonth();
         break;
       }
+      case (PracticeType.century): {
+        this.practiceThing = PracticeThingCentury();
+        break;
+      }
       default: {
         //
       }

lib/pages/practice/PracticeSetupPage.dart

@@ -90,10 +90,16 @@ class _PracticeSetupState extends State<PracticeSetupPage> {
                   TableRow(
                     children: <Widget>[
                       FlatButton(
-                        child: Text("Year"),
+                        child: Text("Century"),
                         color: Colors.blue,
                         textColor: Colors.white,
-                        onPressed: () {},
+                        onPressed: () {
+                          Navigator.pushNamed(
+                              context,
+                              '/practice/practice',
+                              arguments: PracticeSetup(_count, _showCorrect, PracticeType.century)
+                          );
+                        },
                       ),
                       Text("80%", textAlign: TextAlign.center, style: TextStyle(fontSize: 25)),
                       Text("70%", textAlign: TextAlign.center, style: TextStyle(fontSize: 25)),

lib/pages/practice/PracticeThingCentury.dart

@@ -0,0 +1,85 @@
+import 'dart:ui';
+
+import 'package:flutter/material.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 PracticeThingCentury extends PracticeThing {
+  int current;
+
+  PracticeThingCentury(){
+    next();
+  }
+
+  @override
+  bool answer(int answer) {
+    answers.add(PracticeAnswer(current, answer, PracticeType.month));
+    final correctAnswer = DayCalculator.getCenturyValue(current);
+    return answer == correctAnswer;
+  }
+
+  @override
+  void next() {
+    current = 1700 + random.nextInt(500);
+  }
+
+  List<bool> getBoolAnswers(){
+    return answers.map((answer) =>
+      answer.answer == DayCalculator.getCenturyValue(answer.question)
+    ).toList();
+  }
+
+  Text getAppBarTitleText(){
+    return Text("Practicing Centuries");
+  }
+
+  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.getCenturyValue(answer.question);
+      text = answer.question.toString() + (showCorrect ? ": $correctAnswer" : "");
+      if(answer.answer == 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.getCenturyValue(answer.question);
+      text = answer.question.toString() + (showCorrect ? ": $correctAnswer" : "");
+      if(answer.answer == correctAnswer){
+        color = Colors.green;
+      }
+    }
+    return Text(
+      text,
+      style: TextStyle(
+          fontSize: 10,
+          color: color
+      )
+    );
+  }
+}

lib/pages/practice/PracticeThingMonth.dart

@@ -72,11 +72,11 @@ class PracticeThingMonth extends PracticeThing {
       }
     }
     return Text(
-        text,
+      text,
-        style: TextStyle(
+      style: TextStyle(
-            fontSize: 10,
+        fontSize: 10,
-            color: color
+        color: color
-        )
+      )
     );
   }
 }