From 0bca109ad82088bacae8805eeefb142259557eba Mon Sep 17 00:00:00 2001
From: dbuechel <damian.buechel@let.ethz.ch>
Date: Tue, 27 Aug 2019 11:25:38 +0200
Subject: [PATCH] SEBWIN-141: Made workaround for initial touch activation of
 browser control permanent, as there appears to be no other way to fix the
 issue.

---
 SafeExamBrowser.Browser/BrowserControl.cs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/SafeExamBrowser.Browser/BrowserControl.cs b/SafeExamBrowser.Browser/BrowserControl.cs
index 6902dd01..4436c2ab 100644
--- a/SafeExamBrowser.Browser/BrowserControl.cs
+++ b/SafeExamBrowser.Browser/BrowserControl.cs
@@ -6,6 +6,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
+using System;
 using CefSharp;
 using CefSharp.WinForms;
 using SafeExamBrowser.Contracts.UserInterface.Browser;
@@ -107,5 +108,16 @@ namespace SafeExamBrowser.Browser
 		{
 			GetBrowser().SetZoomLevel(level);
 		}
+
+		protected override IWindowInfo CreateBrowserWindowInfo(IntPtr handle)
+		{
+			const uint WS_EX_NOACTIVATE = 0x8000000;
+			var windowInfo = base.CreateBrowserWindowInfo(handle);
+
+			// Ensures that input elements within the browser control actually receive input when activated via touch.
+			windowInfo.ExStyle &= ~WS_EX_NOACTIVATE;
+
+			return windowInfo;
+		}
 	}
 }