From b0e67d9f85f69a5cb5c2259d9c61c53a92784bdc Mon Sep 17 00:00:00 2001
From: Marty Oehme <marty.oehme@gmail.com>
Date: Wed, 29 Aug 2018 22:13:13 +0200
Subject: [PATCH] Add getter and setter methods for wrapper

!!Need testing
---
 lib/src/Grid.dart | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/lib/src/Grid.dart b/lib/src/Grid.dart
index 540e9e7..e6bf335 100644
--- a/lib/src/Grid.dart
+++ b/lib/src/Grid.dart
@@ -1,4 +1,5 @@
 import 'dart:core';
+import 'dart:math';
 
 import 'package:collection/collection.dart';
 
@@ -19,4 +20,24 @@ class Grid<E> extends DelegatingList<E> {
         width = w,
         height = h,
         super(l);
+
+  E elementAtPos(int x, int y) {
+    int i = toIndex(x, y);
+    if (i >= length) throw RangeError.index(i, this);
+    _internal[i];
+  }
+
+  void setElement(int x, int y, E value) {
+    int i = toIndex(x, y);
+    if (i >= length) throw RangeError.index(i, this);
+    _internal[i] = value;
+  }
+
+  E get(int x, int y) => elementAtPos(x, y);
+
+  void set(int x, int y, E value) => setElement(x, y, value);
+
+  int toIndex(int x, int y) => y * width + x;
+
+  Point<int> toCoords(int index) => Point<int>(index % width, index ~/ width);
 }