update the widget from the helper if an event changes

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

@@ -365,19 +365,16 @@ class EventActivity : SimpleActivity(), DBHelper.EventsListener {
             toast(R.string.event_added)
         }
         scheduleNotification(event)
-        updateWidget()
         finish()
     }
 
     override fun eventUpdated(event: Event) {
         scheduleNotification(event)
         toast(R.string.event_updated)
-        updateWidget()
         finish()
     }
 
     override fun eventsDeleted(cnt: Int) {
-        updateWidget()
     }
 
     override fun gotEvents(events: MutableList<Event>) {

app/src/main/kotlin/com/simplemobiletools/calendar/fragments/DayFragment.kt

@@ -17,7 +17,6 @@ import com.simplemobiletools.calendar.R
 import com.simplemobiletools.calendar.activities.EventActivity
 import com.simplemobiletools.calendar.adapters.EventsAdapter
 import com.simplemobiletools.calendar.extensions.adjustAlpha
-import com.simplemobiletools.calendar.extensions.updateWidget
 import com.simplemobiletools.calendar.helpers.*
 import com.simplemobiletools.calendar.helpers.Formatter
 import com.simplemobiletools.calendar.interfaces.NavigationListener
@@ -220,16 +219,13 @@ class DayFragment : Fragment(), DBHelper.EventsListener, AdapterView.OnItemClick
     }
 
     override fun eventInserted(event: Event) {
-        context.updateWidget()
     }
 
     override fun eventUpdated(event: Event) {
-        context.updateWidget()
     }
 
     override fun eventsDeleted(cnt: Int) {
         checkEvents()
-        context.updateWidget()
     }
 
     override fun gotEvents(events: MutableList<Event>) {

app/src/main/kotlin/com/simplemobiletools/calendar/fragments/EventListFragment.kt

@@ -14,7 +14,6 @@ import com.simplemobiletools.calendar.activities.MainActivity
 import com.simplemobiletools.calendar.adapters.EventsListAdapter
 import com.simplemobiletools.calendar.extensions.beGoneIf
 import com.simplemobiletools.calendar.extensions.beVisibleIf
-import com.simplemobiletools.calendar.extensions.updateWidget
 import com.simplemobiletools.calendar.helpers.DBHelper
 import com.simplemobiletools.calendar.helpers.EVENT_ID
 import com.simplemobiletools.calendar.helpers.Formatter
@@ -185,17 +184,14 @@ class EventListFragment : Fragment(), DBHelper.GetEventsListener, AdapterView.On
 
     override fun eventInserted(event: Event) {
         checkEvents()
-        context.updateWidget()
     }
 
     override fun eventUpdated(event: Event) {
         checkEvents()
-        context.updateWidget()
     }
 
     override fun eventsDeleted(cnt: Int) {
         checkPlaceholderVisibility()
-        context.updateWidget()
     }
 
     interface DeleteListener : NavigationListener {

app/src/main/kotlin/com/simplemobiletools/calendar/helpers/DBHelper.kt

@@ -9,6 +9,7 @@ import android.database.sqlite.SQLiteQueryBuilder
 import android.text.TextUtils
 import com.simplemobiletools.calendar.extensions.getIntValue
 import com.simplemobiletools.calendar.extensions.getStringValue
+import com.simplemobiletools.calendar.extensions.updateWidget
 import com.simplemobiletools.calendar.models.Event
 import org.joda.time.DateTime
 import java.util.*
@@ -30,6 +31,7 @@ class DBHelper(context: Context) : SQLiteOpenHelper(context, DB_NAME, null, DB_V
     private val COL_REPEAT_DAY = "repeat_day"
 
     private var mEventsListener: EventsListener? = null
+    private var context: Context? = null
 
     companion object {
         private val DB_NAME = "events.db"
@@ -39,6 +41,7 @@ class DBHelper(context: Context) : SQLiteOpenHelper(context, DB_NAME, null, DB_V
 
     constructor(context: Context, callback: EventsListener?) : this(context) {
         mEventsListener = callback
+        this.context = context
     }
 
     init {
@@ -76,6 +79,7 @@ class DBHelper(context: Context) : SQLiteOpenHelper(context, DB_NAME, null, DB_V
             mDb.insert(META_TABLE_NAME, null, metaValues)
         }
 
+        context?.updateWidget()
         mEventsListener?.eventInserted(event)
     }
 
@@ -93,6 +97,7 @@ class DBHelper(context: Context) : SQLiteOpenHelper(context, DB_NAME, null, DB_V
             mDb.insertWithOnConflict(META_TABLE_NAME, null, metaValues, SQLiteDatabase.CONFLICT_REPLACE)
         }
 
+        context?.updateWidget()
         mEventsListener?.eventUpdated(event)
     }
 
@@ -133,6 +138,7 @@ class DBHelper(context: Context) : SQLiteOpenHelper(context, DB_NAME, null, DB_V
         val metaSelection = "$COL_EVENT_ID IN ($args)"
         mDb.delete(META_TABLE_NAME, metaSelection, null)
 
+        context?.updateWidget()
         mEventsListener?.eventsDeleted(ids.size)
     }