From 0b14d116a7fd2649fc8a64343614239d0cff8113 Mon Sep 17 00:00:00 2001
From: Marcos Scriven <marcosscriven@Marcoss-MacBook-Pro.local>
Date: Tue, 30 Apr 2013 09:43:24 +0100
Subject: [PATCH] Added mousewheel event to canvas, alongside existing
 mouseup/down events. This enables easy hooking in of scroll-to-zoom
 functionality

---
 src/main.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/main.js b/src/main.js
index a5dc78b..e6188b0 100644
--- a/src/main.js
+++ b/src/main.js
@@ -296,6 +296,12 @@ function addEventListeners() {
     if (gl.onmouseup) gl.onmouseup(e);
     e.preventDefault();
   }
+  function mousewheel(e) {
+    gl = context;
+    e = augment(e);
+    if(gl.onmousewheel) gl.onmousewheel(e);
+    e.preventDefault();
+  }
   function reset() {
     hasOld = false;
   }
@@ -306,6 +312,7 @@ function addEventListeners() {
   on(gl.canvas, 'mousedown', mousedown);
   on(gl.canvas, 'mousemove', mousemove);
   on(gl.canvas, 'mouseup', mouseup);
+  on(gl.canvas, 'mousewheel', mousewheel);
   on(gl.canvas, 'mouseover', reset);
   on(gl.canvas, 'mouseout', reset);
   on(document, 'contextmenu', resetAll);