From e84d073233404e3375fc3708c0da079c88c012e5 Mon Sep 17 00:00:00 2001
From: Mark Murnane <mark@hackafe.net>
Date: Thu, 12 May 2022 07:40:05 -0400
Subject: [PATCH] Add gamepad support for body (#24415)

This MR adds basic gamepad support to the joystick web client.
The mappings appear to be consistent between a few controllers I tried, so I think inverting both axes is the optimal mapping.
---
 tools/joystick/web.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)
diff --git a/tools/joystick/web.py b/tools/joystick/web.py
index 5db48eea24..5cba4e938d 100755
--- a/tools/joystick/web.py
+++ b/tools/joystick/web.py
@@ -16,11 +16,24 @@ index = """
 <body>
 <div id="joyDiv" style="width:100%;height:100%"></div>
 <script type="text/javascript">
+// Set up gamepad handlers
+let gamepad = null;
+window.addEventListener("gamepadconnected", function(e) {
+  gamepad = e.gamepad;
+});
+window.addEventListener("gamepaddisconnected", function(e) {
+  gamepad = null;
+});
 // Create JoyStick object into the DIV 'joyDiv'
 var joy = new JoyStick('joyDiv');
 setInterval(function(){
   var x = -joy.GetX()/100;
   var y = joy.GetY()/100;
+  if (x === 0 && y === 0 && gamepad !== null) {
+    let gamepadstate = navigator.getGamepads()[gamepad.index];
+    x = -gamepadstate.axes[0];
+    y = -gamepadstate.axes[1];
+  }
   let xhr = new XMLHttpRequest();
   xhr.open("GET", "/control/"+x+"/"+y);
   xhr.send();
