use quantity and notes from previous event as default

app/src/main/java/it/danieleverducci/lunatracker/MainActivity.kt

@@ -283,6 +283,8 @@ class MainActivity : AppCompatActivity() {
     }
 
     fun askNotes(lunaEvent: LunaEvent) {
+        val previous = getPreviousSameEvent(lunaEvent, getAllEvents())
+
         val d = AlertDialog.Builder(this)
         val dialogView = layoutInflater.inflate(R.layout.dialog_notes, null)
         d.setTitle(lunaEvent.getTypeDescription(this))
@@ -290,6 +292,16 @@ class MainActivity : AppCompatActivity() {
         d.setView(dialogView)
         val notesET = dialogView.findViewById<EditText>(R.id.notes_edittext)
         val qtyET = dialogView.findViewById<EditText>(R.id.notes_qty_edittext)
+        if (previous != null) {
+            // set field defaults from previous event
+            qtyET.alpha = 0.5f
+            notesET.alpha = 0.5f
+            notesET.setText(previous.notes)
+            qtyET.setText(previous.quantity.toString())
+            notesET.doOnTextChanged { text, start, count, after -> qtyET.alpha = 1.0f }
+            notesET.doOnTextChanged { text, start, count, after -> notesET.alpha = 1.0f }
+        }
+
         if (lunaEvent.type == LunaEvent.TYPE_NOTE || lunaEvent.type == LunaEvent.TYPE_CUSTOM)
             qtyET.visibility = View.GONE
         d.setPositiveButton(android.R.string.ok) { dialogInterface, i ->