From 463854e42ac7230e9ae356b72b2da1a76502a552 Mon Sep 17 00:00:00 2001
From: David Luzar <luzar.david@gmail.com>
Date: Mon, 9 Mar 2020 15:19:38 +0100
Subject: [PATCH] fix pinch zoom (#885)

---
 src/components/App.tsx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/components/App.tsx b/src/components/App.tsx
index 4c547458..e3b63b6d 100644
--- a/src/components/App.tsx
+++ b/src/components/App.tsx
@@ -1769,7 +1769,8 @@ export class App extends React.Component<any, AppState> {
     event.preventDefault();
     const { deltaX, deltaY } = event;
 
-    if (event[KEYS.CTRL_OR_CMD]) {
+    // note that event.ctrlKey is necessary to handle pinch zooming
+    if (event.metaKey || event.ctrlKey) {
       const sign = Math.sign(deltaY);
       const MAX_STEP = 10;
       let delta = Math.abs(deltaY);