From f84d74378fe28883bd22c250caaf99c2e36efa48 Mon Sep 17 00:00:00 2001
From: Philip Rideout <philiprideout@gmail.com>
Date: Tue, 11 Sep 2018 13:23:50 -0700
Subject: [PATCH] Ignore non-primary touch events.

---
 samples/web/filaweb.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/samples/web/filaweb.js b/samples/web/filaweb.js
index 9f3631bea3..45b9538d52 100644
--- a/samples/web/filaweb.js
+++ b/samples/web/filaweb.js
@@ -48,6 +48,9 @@ function maybe_launch() {
 // Update a tiny queue of pointer events. We don't send them to WASM immediately because ImGui
 // detects click events by looking for three consecutive frames of down-up-down.
 function canvas_mouse(evt) {
+    if (evt.pointerType == 'touch' && !evt.isPrimary) {
+        return;
+    }
     let args = [evt.clientX, evt.clientY, evt.deltaX || 0, evt.deltaY || 0, evt.buttons];
     if (evt.buttons != previous_mouse_buttons || queued_mouse_events.length == 0) {
         queued_mouse_events.push(args);