From 1311df62964f356e07712446d841ed41a03530b9 Mon Sep 17 00:00:00 2001
From: theom <theo.montaigu@gmail.com>
Date: Wed, 8 Feb 2023 00:22:46 +0100
Subject: [PATCH] added saving of the last calculation during a rotation

---
 .../calculator/activities/MainActivity.kt                  | 6 ++++--
 .../simplemobiletools/calculator/helpers/CalculatorImpl.kt | 7 +++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/app/src/main/kotlin/com/simplemobiletools/calculator/activities/MainActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calculator/activities/MainActivity.kt
index 2d31451e..89d22a77 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/activities/MainActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/activities/MainActivity.kt
@@ -34,6 +34,7 @@ class MainActivity : SimpleActivity(), Calculator {
     //============================================================
 
     private var savedRes: String = "999"
+    private var savedPreviousCalculation = ""
 
     //============================================================
 
@@ -51,10 +52,10 @@ class MainActivity : SimpleActivity(), Calculator {
         if(savedInstanceState != null) {
             Log.v("MainActivity", "LOG TEST");
             savedRes = savedInstanceState?.getCharSequence("res", "123") as String
-
+            savedPreviousCalculation = savedInstanceState?.getCharSequence("savedPreviousCalculation", "") as String
         }
         Log.v("MainActivity", "LOG NO IF TEST");
-        calc = CalculatorImpl(this, applicationContext, savedRes)
+        calc = CalculatorImpl(this, applicationContext, savedRes, savedPreviousCalculation)
 
         //============================================================
 
@@ -264,6 +265,7 @@ class MainActivity : SimpleActivity(), Calculator {
     override fun onSaveInstanceState(bundle: Bundle) {
         super.onSaveInstanceState(bundle)
         bundle.putString("res", calc.mResult)
+        bundle.putString("savedPreviousCalculation", calc.previousCalculation)
     }
 
     //============================================================
diff --git a/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt b/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt
index 7ff024ac..9725139e 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calculator/helpers/CalculatorImpl.kt
@@ -13,6 +13,7 @@ class CalculatorImpl(
     private val context: Context,
     //============================================================
     var res: String,
+    savedLastOperation: String,
     //============================================================
     private var decimalSeparator: String = DOT,
     private var groupingSeparator: String = COMMA
@@ -22,6 +23,7 @@ class CalculatorImpl(
     //============================================================
     // Trying Fix it
     public var mResult = res
+    public var previousCalculation = savedLastOperation
     //============================================================
 
     private var baseValue = 0.0
@@ -41,6 +43,7 @@ class CalculatorImpl(
         //============================================================
         //showNewResult("0")
         showNewResult(mResult)
+        showNewFormula(previousCalculation)
         //============================================================
     }
 
@@ -295,6 +298,10 @@ class CalculatorImpl(
                 )
                 showNewFormula(newFormula)
 
+                //============================================================
+                previousCalculation = newFormula
+                //============================================================
+
                 inputDisplayedFormula = result.format()
                 baseValue = result
             } catch (e: Exception) {