From 53773edbb952c65956f234a996d34f3be93a08e4 Mon Sep 17 00:00:00 2001
From: DXie123 <1541278149@qq.com>
Date: Fri, 8 Nov 2019 17:45:03 +0800
Subject: [PATCH] ready for a new release

---
 README.md              |  7 +++++--
 lib/src/mathmodel.dart | 17 ++++++++++-------
 lib/src/result.dart    | 14 +++++---------
 3 files changed, 20 insertions(+), 18 deletions(-)

diff --git a/README.md b/README.md
index 5b4b96f..c5937ea 100644
--- a/README.md
+++ b/README.md
@@ -8,8 +8,11 @@ A scientific & intutive calculator written in Flutter.
 
 ## ScreenShot
 <div align="center">
-    <img src="https://s2.ax1x.com/2019/10/20/KKUwuD.png" height=300>
-    <img src="https://s2.ax1x.com/2019/10/20/KKUUgK.png" height=300>
+    <img src="https://s2.ax1x.com/2019/11/08/MZumss.png" height=300>
+    <img src="https://s2.ax1x.com/2019/11/08/MZueMj.png" height=300>
+    <img src="https://s2.ax1x.com/2019/11/08/MZuQoV.png" height=300>
+    <img src="https://s2.ax1x.com/2019/11/08/MZKK6H.png" height=300>
+    <img src="https://s2.ax1x.com/2019/11/08/MZu5Y8.png" height=300>
     <img src="https://s2.ax1x.com/2019/10/20/KKUajO.png" height=300>
 </div>
 
diff --git a/lib/src/mathmodel.dart b/lib/src/mathmodel.dart
index dbb0610..42b64cf 100644
--- a/lib/src/mathmodel.dart
+++ b/lib/src/mathmodel.dart
@@ -92,19 +92,22 @@ class MathModel with ChangeNotifier {
 }
 
 class MatrixModel with ChangeNotifier {
-  List<String> _matrixExpHistory = [''];
+  List<String> _matrixExpHistory = [];
   String _matrixExression;
   Matrix _matrix;
   int _precision;
-  bool single = true;
-  bool square = true;
+  bool _single = true;
+  bool _square = true;
+
+  bool get single => _single;
+  bool get square => _square;
 
   void updateExpression(String expression) {
     _matrixExression = expression;
     final mp = MatrixParser(_matrixExression, precision: _precision);
     _matrix = mp.parse();
-    single = mp.single;
-    square = mp.square;
+    _single = mp.single;
+    _square = mp.square;
     notifyListeners();
   }
 
@@ -116,8 +119,8 @@ class MatrixModel with ChangeNotifier {
   void norm() {
     _matrixExpHistory.add(_matrixExression);
     _matrixExression = _matrix.det().toString();
-    single = false;
-    square = false;
+    _single = false;
+    _square = false;
     notifyListeners();
   }
 
diff --git a/lib/src/result.dart b/lib/src/result.dart
index a7592f0..44f82a6 100644
--- a/lib/src/result.dart
+++ b/lib/src/result.dart
@@ -39,18 +39,14 @@ class _ResultState extends State<Result> with TickerProviderStateMixin {
       alignment: Alignment.centerRight,
       child: Consumer<MathModel>(
         builder: (_, model, __) {
-          final _textController = TextEditingController();
+          String text;
           if (model.result!='' && animationController.status == AnimationStatus.dismissed) {
-            _textController.text = '= ' + model.result;
+            text = '= ' + model.result;
           } else {
-            _textController.text = model.result;
+            text = model.result;
           }
-          return TextField(
-            controller: _textController,
-            readOnly: true,
-            textAlign: TextAlign.right,
-            autofocus: true,
-            decoration: null,
+          return SelectableText(
+            text,
             style: TextStyle(
               fontFamily: 'Minion-Pro',
               fontSize: animation.value - 5,