From ca981898d43213a689e92922b34a6052a138a027 Mon Sep 17 00:00:00 2001
From: Devin Howard <devin@callysto.com>
Date: Sun, 2 Oct 2016 00:09:55 +0800
Subject: [PATCH] arrow key panning - fixes #239

---
 frontend/src/Metamaps/Listeners.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/frontend/src/Metamaps/Listeners.js b/frontend/src/Metamaps/Listeners.js
index a7f95fdf..2eb092dd 100644
--- a/frontend/src/Metamaps/Listeners.js
+++ b/frontend/src/Metamaps/Listeners.js
@@ -24,6 +24,18 @@ const Listeners = {
         case 27: // if esc key is pressed
           JIT.escKeyHandler()
           break
+        case 37: // if Left arrow key is pressed
+          Visualize.mGraph.canvas.translate(-20, 0)
+          break
+        case 38: // if Up arrow key is pressed
+          Visualize.mGraph.canvas.translate(0, -20)
+          break
+        case 39: // if Right arrow key is pressed
+          Visualize.mGraph.canvas.translate(20, 0)
+          break
+        case 40: // if Down arrow key is pressed
+          Visualize.mGraph.canvas.translate(0, 20)
+          break
         case 65: // if a or A is pressed
           if (e.ctrlKey) {
             Control.deselectAllNodes()