From b689a195ff283414968d4b433e389a06742e166c Mon Sep 17 00:00:00 2001
From: Michael M <mchtly@gmail.com>
Date: Thu, 5 Jul 2018 14:17:07 -0700
Subject: [PATCH 1/2] Qt: add Settings::DevicesChanged signal

---
 Source/Core/DolphinQt/Settings.cpp | 4 ++++
 Source/Core/DolphinQt/Settings.h   | 1 +
 2 files changed, 5 insertions(+)

diff --git a/Source/Core/DolphinQt/Settings.cpp b/Source/Core/DolphinQt/Settings.cpp
index fa992bee7d..61062d9894 100644
--- a/Source/Core/DolphinQt/Settings.cpp
+++ b/Source/Core/DolphinQt/Settings.cpp
@@ -22,6 +22,7 @@
 #include "DolphinQt/GameList/GameListModel.h"
 #include "DolphinQt/QtUtils/QueueOnObject.h"
 
+#include "InputCommon/ControllerInterface/ControllerInterface.h"
 #include "InputCommon/InputConfig.h"
 
 Settings::Settings()
@@ -34,6 +35,9 @@ Settings::Settings()
   Config::AddConfigChangedCallback(
       [this] { QueueOnObject(this, [this] { emit ConfigChanged(); }); });
 
+  g_controller_interface.RegisterDevicesChangedCallback(
+      [this] { QueueOnObject(this, [this] { emit DevicesChanged(); }); });
+
   SetCurrentUserStyle(GetCurrentUserStyle());
 }
 
diff --git a/Source/Core/DolphinQt/Settings.h b/Source/Core/DolphinQt/Settings.h
index ba6facb87c..0c1b61d745 100644
--- a/Source/Core/DolphinQt/Settings.h
+++ b/Source/Core/DolphinQt/Settings.h
@@ -159,6 +159,7 @@ signals:
   void DebugFontChanged(QFont font);
   void AutoUpdateTrackChanged(const QString& mode);
   void AnalyticsToggled(bool enabled);
+  void DevicesChanged();
 
 private:
   bool m_batch = false;

From ce98a9c71d3bb03bb127601c3d09c647a5d41767 Mon Sep 17 00:00:00 2001
From: Michael M <mchtly@gmail.com>
Date: Thu, 5 Jul 2018 14:17:47 -0700
Subject: [PATCH 2/2] Qt/MappingWindow: update devices combo box when
 hotplugging devices

---
 Source/Core/DolphinQt/Config/Mapping/MappingWindow.cpp | 8 +++++++-
 Source/Core/DolphinQt/Config/Mapping/MappingWindow.h   | 1 +
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/Source/Core/DolphinQt/Config/Mapping/MappingWindow.cpp b/Source/Core/DolphinQt/Config/Mapping/MappingWindow.cpp
index 48e5a5f0f2..1b6f629c1c 100644
--- a/Source/Core/DolphinQt/Config/Mapping/MappingWindow.cpp
+++ b/Source/Core/DolphinQt/Config/Mapping/MappingWindow.cpp
@@ -136,6 +136,8 @@ void MappingWindow::CreateMainLayout()
 
 void MappingWindow::ConnectWidgets()
 {
+  connect(&Settings::Instance(), &Settings::DevicesChanged, this,
+          &MappingWindow::OnGlobalDevicesChanged);
   connect(m_button_box, &QDialogButtonBox::rejected, this, &QDialog::reject);
   connect(m_devices_refresh, &QPushButton::clicked, this, &MappingWindow::RefreshDevices);
   connect(m_devices_combo, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
@@ -242,11 +244,15 @@ bool MappingWindow::IsMappingAllDevices() const
 }
 
 void MappingWindow::RefreshDevices()
+{
+  Core::RunAsCPUThread([&] { g_controller_interface.RefreshDevices(); });
+}
+
+void MappingWindow::OnGlobalDevicesChanged()
 {
   m_devices_combo->clear();
 
   Core::RunAsCPUThread([&] {
-    g_controller_interface.RefreshDevices();
     m_controller->UpdateReferences(g_controller_interface);
 
     const auto default_device = m_controller->GetDefaultDevice().ToString();
diff --git a/Source/Core/DolphinQt/Config/Mapping/MappingWindow.h b/Source/Core/DolphinQt/Config/Mapping/MappingWindow.h
index c0a9f47af2..0432286e01 100644
--- a/Source/Core/DolphinQt/Config/Mapping/MappingWindow.h
+++ b/Source/Core/DolphinQt/Config/Mapping/MappingWindow.h
@@ -76,6 +76,7 @@ private:
   void OnSaveProfilePressed();
   void OnDefaultFieldsPressed();
   void OnDeviceChanged(int index);
+  void OnGlobalDevicesChanged();
 
   ControllerEmu::EmulatedController* m_controller = nullptr;