1 files changed, 21 insertions, 0 deletions
diff --git a/js/ui/keys.js b/js/ui/keys.js
index ba63fa7..a83ac55 100644
--- a/js/ui/keys.js
+++ b/js/ui/keys.js
@@ -159,6 +159,27 @@ var keys = (function(){
       }
     }
   }
+  keys.left_right_key = function (fn) {
+    return function (e){
+      console.log(e.keyCode)
+      switch (e.keyCode) {
+        case 39: // right
+          e.preventDefault()
+          fn(1)
+          break
+        case 38: // up
+        case 40: // down
+          e.preventDefault()
+          fn(0)
+          break
+        case 37: // left
+          e.preventDefault()
+          fn(-1)
+          break
+      }
+    }
+  }
+
   keys.single_numeral_key = function (lex, fn) {
     return keys.int_key(function(n, keyCode){
       if (n == 0) n = 10