unrealimgui-allow-function-keys.diff

diff --git a/Source/ImGui/Private/ImGuiInputHandler.cpp b/Source/ImGui/Private/ImGuiInputHandler.cpp
index 67cc6671e6760ac6ab96d9b547f9091e87163d04..18e95f96566486e43d8433dcfa12923086caa1d4 100644
--- a/Source/ImGui/Private/ImGuiInputHandler.cpp
+++ b/Source/ImGui/Private/ImGuiInputHandler.cpp
@@ -60,6 +60,12 @@ FReply UImGuiInputHandler::OnKeyDown(const FKeyEvent& KeyEvent)
 		}
 
 #if WITH_EDITOR
+		// Allow any function keys within the editor
+		if (IsFunctionKeyEvent(KeyEvent))
+		{
+			return ToReply(false);
+		}
+
 		// If there is no active ImGui control that would get precedence and this key event is bound to a stop play session
 		// command, then ignore that event and let the command execute.
 		if (!HasImGuiActiveItem() && IsStopPlaySessionEvent(KeyEvent))
@@ -277,6 +283,20 @@ bool UImGuiInputHandler::IsStopPlaySessionEvent(const FKeyEvent& KeyEvent) const
 
 	return false;
 }
+
+bool UImGuiInputHandler::IsFunctionKeyEvent(const FKeyEvent& KeyEvent) const
+{
+	FKey Key = KeyEvent.GetKey();
+
+	if (Key == EKeys::F1 || Key == EKeys::F2 || Key == EKeys::F3 || Key == EKeys::F4 ||
+		Key == EKeys::F5 || Key == EKeys::F6 || Key == EKeys::F7 || Key == EKeys::F8 ||
+		Key == EKeys::F9 || Key == EKeys::F10 || Key == EKeys::F11 || Key == EKeys::F12)
+	{
+		return true;
+	}
+
+	return false;
+}
 #endif // WITH_EDITOR
 
 namespace
diff --git a/Source/ImGui/Public/ImGuiInputHandler.h b/Source/ImGui/Public/ImGuiInputHandler.h
index 093ea63206976c07cc065dc6d1c95f7475463251..1e8f1642ef2519a1d5d77a8203ada9566ec36a91 100644
--- a/Source/ImGui/Public/ImGuiInputHandler.h
+++ b/Source/ImGui/Public/ImGuiInputHandler.h
@@ -151,6 +151,13 @@ protected:
 	 * @returns True, if this key event can stop PIE session.
 	 */
 	bool IsStopPlaySessionEvent(const FKeyEvent& KeyEvent) const;
+
+	/**
+	* Checks whether this key event is a function key.
+	* @param KeyEvent - Key event to test.
+	* @returns True, if this key is a function key.
+	*/
+	bool IsFunctionKeyEvent(const FKeyEvent& KeyEvent) const;
 #endif
 
 	/**