disable default drag handling

MainForm.cs

@@ -39,6 +39,7 @@ namespace VRCX
             // Application.StartupPath + "/html/index.html"
             Browser = new ChromiumWebBrowser(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "html/index.html"))
             {
+                DragHandler = new NoopDragHandler(),
                 BrowserSettings =
                 {
                     // UniversalAccessFromFileUrls = CefState.Enabled,

NoopDragHandler.cs

@@ -0,0 +1,23 @@
+// Copyright(c) 2019 pypy. All rights reserved.
+//
+// This work is licensed under the terms of the MIT license.
+// For a copy, see <https://opensource.org/licenses/MIT>.
+
+using System.Collections.Generic;
+using CefSharp;
+using CefSharp.Enums;
+
+namespace VRCX
+{
+    public class NoopDragHandler : IDragHandler
+    {
+        bool IDragHandler.OnDragEnter(IWebBrowser chromiumWebBrowser, IBrowser browser, IDragData dragData, DragOperationsMask mask)
+        {
+            return true;
+        }
+
+        void IDragHandler.OnDraggableRegionsChanged(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IList<DraggableRegion> regions)
+        {
+        }
+    }
+}

VRCX.csproj

@@ -128,6 +128,7 @@
     <Compile Include="Discord.cs" />
     <Compile Include="CpuMonitor.cs" />
     <Compile Include="Browser.cs" />
+    <Compile Include="NoopDragHandler.cs" />
     <Compile Include="RenderHandler.cs" />
     <Compile Include="SQLite.cs" />
     <Compile Include="VRForm.cs">

VRForm.cs

@@ -24,6 +24,7 @@ namespace VRCX
             // 
             Browser1 = new ChromiumWebBrowser(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "html/vr.html?1"))
             {
+                DragHandler = new NoopDragHandler(),
                 BrowserSettings =
                 {
                     // UniversalAccessFromFileUrls = CefState.Enabled,
@@ -33,6 +34,7 @@ namespace VRCX
             };
             Browser2 = new ChromiumWebBrowser(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "html/vr.html?2"))
             {
+                DragHandler = new NoopDragHandler(),
                 BrowserSettings =
                 {
                     // UniversalAccessFromFileUrls = CefState.Enabled,