Added warning when closing edit scene

app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/EventActivity.kt

@@ -240,11 +240,27 @@ class EventActivity : SimpleActivity() {
             R.id.delete -> deleteEvent()
             R.id.duplicate -> duplicateEvent()
             R.id.share -> shareEvent()
+            android.R.id.home -> onBackPressed()
             else -> return super.onOptionsItemSelected(item)
         }
         return true
     }
 
+    override fun onBackPressed() {
+        CloseEditingDialog(this) {
+            ensureBackgroundThread {
+                when (it) {
+                    CLOSE_WITHOUT_SAVING -> {
+                        runOnUiThread {
+                            finish()
+                        }
+                    }
+                    SAVE_AND_CLOSE -> saveEvent()
+                }
+            }
+        }
+    }
+
     override fun onSaveInstanceState(outState: Bundle) {
         super.onSaveInstanceState(outState)
         if (!mWasActivityInitialized) {
@@ -334,6 +350,7 @@ class EventActivity : SimpleActivity() {
         updateAttendeesVisibility()
     }
 
+
     private fun setupEditEvent() {
         val realStart = if (mEventOccurrenceTS == 0L) mEvent.startTS else mEventOccurrenceTS
         val duration = mEvent.endTS - mEvent.startTS
@@ -1011,7 +1028,6 @@ class EventActivity : SimpleActivity() {
             eventsHelper.deleteEvent(mEvent.id!!, true)
             mEvent.id = null
         }
-
         storeEvent(wasRepeatable)
     }
 

app/src/main/kotlin/com/simplemobiletools/calendar/pro/dialogs/CloseEditingDialog.kt

@@ -0,0 +1,33 @@
+package com.simplemobiletools.calendar.pro.dialogs
+
+import android.app.Activity
+import android.view.ViewGroup
+import androidx.appcompat.app.AlertDialog
+import com.simplemobiletools.calendar.pro.R
+import com.simplemobiletools.calendar.pro.helpers.*
+import com.simplemobiletools.commons.extensions.setupDialogStuff
+import kotlinx.android.synthetic.main.dialog_return_without_saving.view.*
+
+class CloseEditingDialog(val activity: Activity, val callback: (closeRule: Int) -> Unit) {
+    val dialog: AlertDialog?
+
+    init {
+        val view = activity.layoutInflater.inflate(R.layout.dialog_return_without_saving, null)
+
+        dialog = AlertDialog.Builder(activity)
+                .setPositiveButton(R.string.yes) { _, _ -> dialogConfirmed(view as ViewGroup) }
+                .setNegativeButton(R.string.no, null)
+                .create().apply {
+                    activity.setupDialogStuff(view, this)
+                }
+    }
+
+    private fun dialogConfirmed(view: ViewGroup) {
+        val closeRule = when (view.close_event_radio_view.checkedRadioButtonId) {
+            R.id.close_event_without_saving -> CLOSE_WITHOUT_SAVING
+            else -> SAVE_AND_CLOSE
+        }
+        dialog?.dismiss()
+        callback(closeRule)
+    }
+}

app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt

@@ -155,4 +155,7 @@ const val DELETE_ALL_OCCURRENCES = 2
 const val REMINDER_NOTIFICATION = 0
 const val REMINDER_EMAIL = 1
 
+const val CLOSE_WITHOUT_SAVING = 0
+const val SAVE_AND_CLOSE = 1
+
 fun getNowSeconds() = System.currentTimeMillis() / 1000L

app/src/main/res/layout/dialog_return_without_saving.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/close_event_holder"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:paddingStart="@dimen/big_margin"
+    android:paddingEnd="@dimen/big_margin"
+    android:paddingTop="@dimen/big_margin">
+
+    <com.simplemobiletools.commons.views.MyTextView
+        android:id="@+id/close_event_description"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/close_editing_event"
+        android:textSize="@dimen/bigger_text_size"/>
+
+    <RadioGroup
+        android:id="@+id/close_event_radio_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="20dp">
+
+        <com.simplemobiletools.commons.views.MyCompatRadioButton
+            android:id="@+id/close_event_without_saving"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:checked="true"
+            android:paddingBottom="@dimen/normal_margin"
+            android:paddingTop="@dimen/normal_margin"
+            android:text="@string/close_without_saving"/>
+
+        <com.simplemobiletools.commons.views.MyCompatRadioButton
+            android:id="@+id/save_and_close_event"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:paddingBottom="@dimen/normal_margin"
+            android:paddingTop="@dimen/normal_margin"
+            android:text="@string/save_and_close"/>
+    </RadioGroup>
+</LinearLayout>

app/src/main/res/values/strings.xml

@@ -293,6 +293,9 @@
         <b>Reddit:</b>
         https://www.reddit.com/r/SimpleMobileTools
     </string>
+    <string name="close_editing_event" translatable="false">Are you sure you want to close?</string>
+    <string name="close_without_saving" translatable="false">Close without saving</string>
+    <string name="save_and_close" translatable="false">Save and close</string>
 
     <!--
         Haven't found some strings? There's more at