Update calculator widget on comma/dot toggle

app/src/main/kotlin/com/simplemobiletools/calculator/activities/MainActivity.kt

@@ -12,6 +12,7 @@ import com.simplemobiletools.calculator.R
 import com.simplemobiletools.calculator.databases.CalculatorDatabase
 import com.simplemobiletools.calculator.dialogs.HistoryDialog
 import com.simplemobiletools.calculator.extensions.config
+import com.simplemobiletools.calculator.extensions.refreshAppWidget
 import com.simplemobiletools.calculator.extensions.updateViewColors
 import com.simplemobiletools.calculator.helpers.*
 import com.simplemobiletools.commons.extensions.*
@@ -83,6 +84,7 @@ class MainActivity : SimpleActivity(), Calculator {
 
         if (storedUseCommaAsDecimalMark != config.useCommaAsDecimalMark) {
             setupDecimalSeparator()
+            refreshAppWidget<MyWidgetProvider>()
         }
 
         vibrateOnButtonPress = config.vibrateOnButtonPress

app/src/main/kotlin/com/simplemobiletools/calculator/activities/SettingsActivity.kt

@@ -5,12 +5,15 @@ import android.os.Bundle
 import android.view.Menu
 import com.simplemobiletools.calculator.R
 import com.simplemobiletools.calculator.extensions.config
+import com.simplemobiletools.calculator.extensions.refreshAppWidget
+import com.simplemobiletools.calculator.helpers.MyWidgetProvider
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.IS_CUSTOMIZING_COLORS
 import kotlinx.android.synthetic.main.activity_settings.*
 import java.util.*
 import kotlin.system.exitProcess
 
+
 class SettingsActivity : SimpleActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -100,6 +103,7 @@ class SettingsActivity : SimpleActivity() {
         settings_use_comma_as_decimal_mark_holder.setOnClickListener {
             settings_use_comma_as_decimal_mark.toggle()
             config.useCommaAsDecimalMark = settings_use_comma_as_decimal_mark.isChecked
+            refreshAppWidget<MyWidgetProvider>()
         }
     }
 

app/src/main/kotlin/com/simplemobiletools/calculator/extensions/Context.kt

@@ -1,12 +1,15 @@
 package com.simplemobiletools.calculator.extensions
 
+import android.appwidget.AppWidgetManager
+import android.content.ComponentName
 import android.content.Context
+import android.content.Intent
 import android.view.ViewGroup
 import android.widget.Button
 import android.widget.TextView
+import com.simplemobiletools.calculator.databases.CalculatorDatabase
 import com.simplemobiletools.calculator.helpers.Config
 import com.simplemobiletools.calculator.interfaces.CalculatorDao
-import com.simplemobiletools.calculator.databases.CalculatorDatabase
 
 val Context.config: Config get() = Config.newInstance(applicationContext)
 
@@ -24,3 +27,11 @@ fun Context.updateViewColors(viewGroup: ViewGroup, textColor: Int) {
             }
         }
 }
+
+inline fun <reified T> Context.refreshAppWidget() {
+    val intent = Intent(this, T::class.java)
+    intent.action = AppWidgetManager.ACTION_APPWIDGET_UPDATE
+    val ids = AppWidgetManager.getInstance(this).getAppWidgetIds(ComponentName(this, T::class.java))
+    intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids)
+    sendBroadcast(intent)
+}

app/src/main/kotlin/com/simplemobiletools/calculator/helpers/MyWidgetProvider.kt

@@ -17,6 +17,9 @@ import com.simplemobiletools.commons.extensions.setText
 class MyWidgetProvider : AppWidgetProvider(), Calculator {
     companion object {
         private var calc: CalculatorImpl? = null
+        private var storedUseCommaAsDecimalMark = false
+        private var decimalSeparator = DOT
+        private var groupingSeparator = COMMA
     }
 
     override fun onUpdate(context: Context, appWidgetManager: AppWidgetManager, appWidgetIds: IntArray) {
@@ -53,6 +56,7 @@ class MyWidgetProvider : AppWidgetProvider(), Calculator {
             views.applyColorFilter(R.id.widget_background, config.widgetBgColor)
 
             updateTextColors(views, config.widgetTextColor)
+            setupDecimalSeparator(views, config.useCommaAsDecimalMark)
             appWidgetManager.updateAppWidget(it, views)
         }
     }
@@ -97,7 +101,7 @@ class MyWidgetProvider : AppWidgetProvider(), Calculator {
 
     private fun myAction(action: String, context: Context) {
         if (calc == null) {
-            calc = CalculatorImpl(this, context)
+            calc = CalculatorImpl(this, context, decimalSeparator, groupingSeparator)
         }
 
         when (action) {
@@ -141,4 +145,17 @@ class MyWidgetProvider : AppWidgetProvider(), Calculator {
         super.onDeleted(context, appWidgetIds)
         calc = null
     }
+
+    private fun setupDecimalSeparator(views: RemoteViews, useCommaAsDecimalMark: Boolean) {
+        storedUseCommaAsDecimalMark = useCommaAsDecimalMark
+        if (storedUseCommaAsDecimalMark) {
+            decimalSeparator = COMMA
+            groupingSeparator = DOT
+        } else {
+            decimalSeparator = DOT
+            groupingSeparator = COMMA
+        }
+        calc?.updateSeparators(decimalSeparator, groupingSeparator)
+        views.setTextViewText(R.id.btn_decimal, decimalSeparator)
+    }
 }