[gtk+/broadway: 69/71] [broadway] Hook mousewheel scrolling

[Alexander Larsson <alexl src gnome org>]

commit 667d23aa7c256728526fb261771646168d63a000
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Nov 25 21:02:21 2010 +0100

    [broadway] Hook mousewheel scrolling

 gdk/broadway/broadway.js |   33 +++++++++++++++++++++++++++++++++
 1 files changed, 33 insertions(+), 0 deletions(-)
---
diff --git a/gdk/broadway/broadway.js b/gdk/broadway/broadway.js
index a2fd483..fb20a98 100644
--- a/gdk/broadway/broadway.js
+++ b/gdk/broadway/broadway.js
@@ -293,6 +293,31 @@ function on_mouse_up (ev) {
   send_input ("B", [get_surface_id(ev), ev.pageX, ev.pageY, ev.button, ev.timeStamp])
 }
 
+function cancel_event(ev)
+{
+  ev = ev ? ev : window.event;
+  if (ev.stopPropagation)
+    ev.stopPropagation();
+  if (ev.preventDefault)
+    ev.preventDefault();
+  ev.cancelBubble = true;
+  ev.cancel = true;
+  ev.returnValue = false;
+  return false;
+}
+
+function on_mouse_wheel(ev)
+{
+  ev = ev ? ev : window.event;
+  var offset = ev.detail ? ev.detail : ev.wheelDelta;
+  var dir = 0
+  if (offset > 0)
+    dir = 1;
+  send_input ("s", [get_surface_id(ev), ev.pageX, ev.pageY, dir, ev.timeStamp])
+
+  return cancel_event(ev);
+}
+
 function connect()
 {
   var xhr = createXHR();
@@ -325,4 +350,12 @@ function connect()
   document.onmousemove = on_mouse_move;
   document.onmousedown = on_mouse_down;
   document.onmouseup = on_mouse_up;
+
+  if (document.addEventListener) {
+    document.addEventListener('DOMMouseScroll', on_mouse_wheel, false);
+    document.addEventListener('mousewheel', on_mouse_wheel, false);
+  } else if (document.attachEvent) {
+    element.attachEvent("onmousewheel", on_mouse_wheel);
+  }
+
 }