reorganize project structure

lib/main.dart

@@ -3,11 +3,12 @@ import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
 import 'package:flutter_icons/flutter_icons.dart';
 
-import 'src/mathbox.dart';
-import 'src/result.dart';
-import 'src/mybutton.dart';
-import 'src/mathmodel.dart';
-import 'src/settingpage.dart';
+import 'package:num_plus_plus/src/widgets/mathbox.dart';
+import 'package:num_plus_plus/src/widgets/result.dart';
+import 'package:num_plus_plus/src/widgets/matrixbutton.dart';
+import 'package:num_plus_plus/src/widgets/keyboard.dart';
+import 'package:num_plus_plus/src/backend/mathmodel.dart';
+import 'package:num_plus_plus/src/pages/settingpage.dart';
 
 void main() {
   runApp(MyApp());

lib/src/latex.dart → lib/src/backend/latex.dart

@@ -3,7 +3,7 @@ import 'package:math_expressions/math_expressions.dart';
 import 'package:linalg/linalg.dart';
 import 'dart:math' as math;
 
-import 'mathmodel.dart';
+import 'package:num_plus_plus/src/backend/mathmodel.dart';
 
 abstract class Parser {
   final bool isRadMode;

lib/src/mathmodel.dart → lib/src/backend/mathmodel.dart

@@ -3,7 +3,7 @@ import 'package:math_expressions/math_expressions.dart';
 import 'package:linalg/linalg.dart';
 
 // import 'function.dart';
-import 'latex.dart';
+import 'package:num_plus_plus/src/backend/latex.dart';
 
 class MathModel with ChangeNotifier {
   List<String> _latexExp = [''];

lib/src/settingpage.dart → lib/src/pages/settingpage.dart

@@ -4,7 +4,7 @@ import 'package:shared_preferences/shared_preferences.dart';
 import 'package:url_launcher/url_launcher.dart';
 import 'package:flutter_icons/flutter_icons.dart';
 
-import 'mathmodel.dart';
+import 'package:num_plus_plus/src/backend/mathmodel.dart';
 
 class SettingPage extends StatelessWidget {
   @override

lib/src/mybutton.dart → lib/src/widgets/keyboard.dart

@@ -3,9 +3,9 @@ import 'package:flutter/material.dart';
 import 'package:flutter_icons/flutter_icons.dart';
 import 'package:provider/provider.dart';
 
-import 'mathbox.dart';
-import 'mathmodel.dart';
-import 'settingpage.dart';
+import 'package:num_plus_plus/src/widgets/mathbox.dart';
+import 'package:num_plus_plus/src/pages/settingpage.dart';
+import 'package:num_plus_plus/src/backend/mathmodel.dart';
 
 class MyButton extends StatelessWidget {
   final Widget child;

lib/src/mathbox.dart → lib/src/widgets/mathbox.dart

@@ -7,7 +7,7 @@ import 'package:flutter/services.dart';
 import 'package:mime/mime.dart';
 import 'package:provider/provider.dart';
 
-import 'mathmodel.dart';
+import 'package:num_plus_plus/src/backend/mathmodel.dart';
 
 class Server {
   // class from inAppBrowser

lib/src/result.dart → lib/src/widgets/matrixbutton.dart

@@ -1,62 +1,8 @@
 import 'package:flutter/material.dart';
-import 'package:num_plus_plus/src/mathbox.dart';
 import 'package:provider/provider.dart';
 
-import 'mathmodel.dart';
-
-class Result extends StatefulWidget {
-  @override
-  _ResultState createState() => _ResultState();
-}
-
-class _ResultState extends State<Result> with TickerProviderStateMixin {
-
-  AnimationController animationController;
-  Animation animation;
-
-  @override
-  void initState() {
-    super.initState();
-    final mathModel = Provider.of<MathModel>(context, listen: false);
-    animationController = AnimationController(duration: const Duration(milliseconds: 400),vsync: this);
-    mathModel.equalAnimation = animationController;
-    final curve = CurvedAnimation(parent: animationController, curve: Curves.easeInOutBack);
-    animation = Tween<double>(begin: 30.0, end: 60.0).animate(curve)
-      ..addListener(() {setState(() {});});
-  }
-
-  @override
-  void dispose() {
-    animationController.dispose();
-    super.dispose();
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Container(
-      height: animation.value,
-      width: double.infinity,
-      alignment: Alignment.centerRight,
-      child: Consumer<MathModel>(
-        builder: (_, model, __) {
-          String text;
-          if (model.result!='' && animationController.status == AnimationStatus.dismissed) {
-            text = '= ' + model.result;
-          } else {
-            text = model.result;
-          }
-          return SelectableText(
-            text,
-            style: TextStyle(
-              fontFamily: 'Minion-Pro',
-              fontSize: animation.value - 5,
-            ),
-          );
-        },
-      ),
-    );
-  }
-}
+import 'package:num_plus_plus/src/backend/mathmodel.dart';
+import 'package:num_plus_plus/src/widgets/mathbox.dart';
 
 class SingleMatrixButton extends StatelessWidget {
   final Widget child;

lib/src/widgets/result.dart

@@ -0,0 +1,58 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+import 'package:num_plus_plus/src/backend/mathmodel.dart';
+
+class Result extends StatefulWidget {
+  @override
+  _ResultState createState() => _ResultState();
+}
+
+class _ResultState extends State<Result> with TickerProviderStateMixin {
+
+  AnimationController animationController;
+  Animation animation;
+
+  @override
+  void initState() {
+    super.initState();
+    final mathModel = Provider.of<MathModel>(context, listen: false);
+    animationController = AnimationController(duration: const Duration(milliseconds: 400),vsync: this);
+    mathModel.equalAnimation = animationController;
+    final curve = CurvedAnimation(parent: animationController, curve: Curves.easeInOutBack);
+    animation = Tween<double>(begin: 30.0, end: 60.0).animate(curve)
+      ..addListener(() {setState(() {});});
+  }
+
+  @override
+  void dispose() {
+    animationController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      height: animation.value,
+      width: double.infinity,
+      alignment: Alignment.centerRight,
+      child: Consumer<MathModel>(
+        builder: (_, model, __) {
+          String text;
+          if (model.result!='' && animationController.status == AnimationStatus.dismissed) {
+            text = '= ' + model.result;
+          } else {
+            text = model.result;
+          }
+          return SelectableText(
+            text,
+            style: TextStyle(
+              fontFamily: 'Minion-Pro',
+              fontSize: animation.value - 5,
+            ),
+          );
+        },
+      ),
+    );
+  }
+}

test/latex_parser_test.dart

@@ -1,6 +1,7 @@
 import 'package:flutter_test/flutter_test.dart';
 import 'package:math_expressions/math_expressions.dart';
-import 'package:num_plus_plus/src/latex.dart';
+
+import 'package:num_plus_plus/src/backend/latex.dart';
 
 void main() {
   test('Unit Test', () {

test/matrix_test.dart

@@ -1,7 +1,8 @@
 import 'package:flutter_test/flutter_test.dart';
-import 'package:num_plus_plus/src/latex.dart';
 import 'package:linalg/linalg.dart';
 
+import 'package:num_plus_plus/src/backend/latex.dart';
+
 void main() {
   test('Parser Test', () {
     const matrixString1 = r'\begin{bmatrix}1&2\\3&4\end{bmatrix}\begin{bmatrix}1&2\\3&4\end{bmatrix}';