ControllerInterface: Add IsHidden function to Control interface.

Source/Core/DolphinQt/Config/Mapping/IOWindow.cpp

@@ -587,28 +587,25 @@ void IOWindow::UpdateOptionList()
   if (m_selected_device == nullptr)
     return;
 
+  const auto add_rows = [this](auto& container) {
+    int row = 0;
+    for (ciface::Core::Device::Control* control : container)
+    {
+      m_option_list->insertRow(row);
+
+      if (control->IsHidden())
+        m_option_list->hideRow(row);
+
+      m_option_list->setItem(row, 0,
+                             new QTableWidgetItem(QString::fromStdString(control->GetName())));
+      ++row;
+    }
+  };
+
   if (m_reference->IsInput())
-  {
-    int row = 0;
-    for (const auto* input : m_selected_device->Inputs())
-    {
-      m_option_list->insertRow(row);
-      m_option_list->setItem(row, 0,
-                             new QTableWidgetItem(QString::fromStdString(input->GetName())));
-      ++row;
-    }
-  }
+    add_rows(m_selected_device->Inputs());
   else
-  {
-    int row = 0;
-    for (const auto* output : m_selected_device->Outputs())
-    {
-      m_option_list->insertRow(row);
-      m_option_list->setItem(row, 0,
-                             new QTableWidgetItem(QString::fromStdString(output->GetName())));
-      ++row;
-    }
-  }
+    add_rows(m_selected_device->Outputs());
 }
 
 void IOWindow::UpdateDeviceList()

Source/Core/InputCommon/ControllerInterface/CoreDevice.cpp

@@ -125,6 +125,11 @@ bool Device::Control::IsMatchingName(std::string_view name) const
   return GetName() == name;
 }
 
+bool Device::Control::IsHidden() const
+{
+  return false;
+}
+
 ControlState Device::FullAnalogSurface::GetState() const
 {
   return (1 + std::max(0.0, m_high.GetState()) - std::max(0.0, m_low.GetState())) / 2;
@@ -141,6 +146,11 @@ bool Device::FullAnalogSurface::IsDetectable() const
   return m_low.IsDetectable() && m_high.IsDetectable();
 }
 
+bool Device::FullAnalogSurface::IsHidden() const
+{
+  return m_low.IsHidden() && m_high.IsHidden();
+}
+
 bool Device::FullAnalogSurface::IsMatchingName(std::string_view name) const
 {
   if (Control::IsMatchingName(name))

Source/Core/InputCommon/ControllerInterface/CoreDevice.h

@@ -64,6 +64,10 @@ public:
     // May be overridden to allow multiple valid names.
     // Useful for backwards-compatible configurations when names change.
     virtual bool IsMatchingName(std::string_view name) const;
+
+    // May be overridden to hide in UI.
+    // Useful for backwards-compatible configurations when names change.
+    virtual bool IsHidden() const;
   };
 
   //
@@ -164,6 +168,7 @@ protected:
     ControlState GetState() const override;
     std::string GetName() const override;
     bool IsDetectable() const override;
+    bool IsHidden() const override;
     bool IsMatchingName(std::string_view name) const override;
 
   private: