move text size getter in an extension

app/src/main/kotlin/com/simplemobiletools/notes/MyWidgetProvider.kt

@@ -11,6 +11,7 @@ import android.widget.RemoteViews
 import com.simplemobiletools.notes.R.layout.widget
 import com.simplemobiletools.notes.activities.MainActivity
 import com.simplemobiletools.notes.databases.DBHelper
+import com.simplemobiletools.notes.extensions.getTextSize
 
 class MyWidgetProvider : AppWidgetProvider() {
     lateinit var mDb: DBHelper
@@ -28,7 +29,7 @@ class MyWidgetProvider : AppWidgetProvider() {
         mRemoteViews.apply {
             setInt(R.id.notes_view, "setBackgroundColor", newBgColor)
             setInt(R.id.notes_view, "setTextColor", newTextColor)
-            setFloat(R.id.notes_view, "setTextSize", Utils.getTextSize(context) / context.resources.displayMetrics.density)
+            setFloat(R.id.notes_view, "setTextSize", context.getTextSize() / context.resources.displayMetrics.density)
         }
 
         for (widgetId in appWidgetIds) {

app/src/main/kotlin/com/simplemobiletools/notes/Utils.kt

@@ -1,16 +0,0 @@
-package com.simplemobiletools.notes
-
-import android.content.Context
-
-object Utils {
-    fun getTextSize(context: Context): Float {
-        val fontSize = Config.newInstance(context).fontSize
-        val res = context.resources
-        return when (fontSize) {
-            FONT_SIZE_SMALL -> res.getDimension(R.dimen.small_text_size)
-            FONT_SIZE_LARGE -> res.getDimension(R.dimen.large_text_size)
-            FONT_SIZE_EXTRA_LARGE -> res.getDimension(R.dimen.extra_large_text_size)
-            else -> res.getDimension(R.dimen.medium_text_size)
-        }
-    }
-}

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

@@ -16,15 +16,15 @@ import com.simplemobiletools.filepicker.extensions.value
 import com.simplemobiletools.notes.MyWidgetProvider
 import com.simplemobiletools.notes.R
 import com.simplemobiletools.notes.TYPE_NOTE
-import com.simplemobiletools.notes.Utils
 import com.simplemobiletools.notes.databases.DBHelper
 import com.simplemobiletools.notes.dialogs.NewNoteDialog
 import com.simplemobiletools.notes.dialogs.OpenNoteDialog
 import com.simplemobiletools.notes.dialogs.WidgetNoteDialog
+import com.simplemobiletools.notes.extensions.getTextSize
 import com.simplemobiletools.notes.models.Note
 import kotlinx.android.synthetic.main.activity_main.*
 
-class MainActivity : SimpleActivity(), OpenNoteDialog.OpenNoteListener {
+class MainActivity : SimpleActivity() {
     private var mCurrentNote: Note? = null
 
     lateinit var mDb: DBHelper
@@ -50,7 +50,7 @@ class MainActivity : SimpleActivity(), OpenNoteDialog.OpenNoteListener {
     override fun onResume() {
         super.onResume()
         invalidateOptionsMenu()
-        notes_view.setTextSize(TypedValue.COMPLEX_UNIT_PX, Utils.getTextSize(applicationContext))
+        notes_view.setTextSize(TypedValue.COMPLEX_UNIT_PX, applicationContext.getTextSize())
     }
 
     override fun onPause() {
@@ -160,7 +160,9 @@ class MainActivity : SimpleActivity(), OpenNoteDialog.OpenNoteListener {
     }
 
     private fun displayOpenNoteDialog() {
-        OpenNoteDialog(this)
+        OpenNoteDialog(this) {
+            updateSelectedNote(it)
+        }
     }
 
     private fun saveText() {
@@ -202,8 +204,6 @@ class MainActivity : SimpleActivity(), OpenNoteDialog.OpenNoteListener {
         imm.hideSoftInputFromWindow(notes_view.windowToken, 0)
     }
 
-    override fun noteSelected(id: Int) = updateSelectedNote(id)
-
     fun updateWidget(context: Context) {
         val widgetManager = AppWidgetManager.getInstance(context)
         val ids = widgetManager.getAppWidgetIds(ComponentName(context, MyWidgetProvider::class.java))

app/src/main/kotlin/com/simplemobiletools/notes/activities/WidgetConfigureActivity.kt

@@ -11,6 +11,7 @@ import android.util.TypedValue
 import android.widget.RemoteViews
 import android.widget.SeekBar
 import com.simplemobiletools.notes.*
+import com.simplemobiletools.notes.extensions.getTextSize
 import kotlinx.android.synthetic.main.widget_config.*
 import yuku.ambilwarna.AmbilWarnaDialog
 
@@ -41,7 +42,7 @@ class WidgetConfigureActivity : AppCompatActivity() {
 
     override fun onResume() {
         super.onResume()
-        notes_view.setTextSize(TypedValue.COMPLEX_UNIT_PX, Utils.getTextSize(applicationContext))
+        notes_view.setTextSize(TypedValue.COMPLEX_UNIT_PX, applicationContext.getTextSize())
     }
 
     private fun initVariables() {

app/src/main/kotlin/com/simplemobiletools/notes/dialogs/OpenNoteDialog.kt

@@ -10,7 +10,7 @@ import com.simplemobiletools.notes.R
 import com.simplemobiletools.notes.databases.DBHelper
 import kotlinx.android.synthetic.main.dialog_radio_group.view.*
 
-class OpenNoteDialog(val activity: Activity) : RadioGroup.OnCheckedChangeListener {
+class OpenNoteDialog(val activity: Activity, val callback: (checkedId: Int) -> Unit) : RadioGroup.OnCheckedChangeListener {
     val dialog: AlertDialog?
 
     init {
@@ -39,11 +39,7 @@ class OpenNoteDialog(val activity: Activity) : RadioGroup.OnCheckedChangeListene
     }
 
     override fun onCheckedChanged(group: RadioGroup, checkedId: Int) {
-        (activity as OpenNoteListener).noteSelected(checkedId)
+        callback.invoke(checkedId)
         dialog?.dismiss()
     }
-
-    interface OpenNoteListener {
-        fun noteSelected(id: Int)
-    }
 }

app/src/main/kotlin/com/simplemobiletools/notes/extensions/context.kt

@@ -0,0 +1,12 @@
+package com.simplemobiletools.notes.extensions
+
+import android.content.Context
+import com.simplemobiletools.notes.*
+
+fun Context.getTextSize() =
+        when (Config.newInstance(this).fontSize) {
+            FONT_SIZE_SMALL -> resources.getDimension(R.dimen.small_text_size)
+            FONT_SIZE_LARGE -> resources.getDimension(R.dimen.large_text_size)
+            FONT_SIZE_EXTRA_LARGE -> resources.getDimension(R.dimen.extra_large_text_size)
+            else -> resources.getDimension(R.dimen.medium_text_size)
+        }