From 640d22b298aa06a33dabc09ba033cd78845f9222 Mon Sep 17 00:00:00 2001
From: Quincy Morgan <quincy.morgan@icloud.com>
Date: Thu, 21 May 2020 14:06:28 -0400
Subject: [PATCH] Prevent default drag and drop of background tile images if
 interaction handlers don't prevent dragging for some reason

---
 css/80_app.css                 | 2 ++
 modules/renderer/tile_layer.js | 1 +
 2 files changed, 3 insertions(+)

diff --git a/css/80_app.css b/css/80_app.css
index 803fcb06c..7a8809be5 100644
--- a/css/80_app.css
+++ b/css/80_app.css
@@ -3993,6 +3993,8 @@ img.tile {
     -ms-user-select: none;
     user-select: none;
 
+    -webkit-user-drag: none;
+
     opacity: 0;
 
     -webkit-transition: opacity 200ms linear;
diff --git a/modules/renderer/tile_layer.js b/modules/renderer/tile_layer.js
index e5b3c7f62..9255927d6 100644
--- a/modules/renderer/tile_layer.js
+++ b/modules/renderer/tile_layer.js
@@ -198,6 +198,7 @@ export function rendererTileLayer(context) {
         image.enter()
           .append('img')
             .attr('class', 'tile')
+            .attr('draggable', 'false')
             .style('width', _tileSize + 'px')
             .style('height', _tileSize + 'px')
             .attr('src', function(d) { return d[3]; })