Input: Add optional "enable" setting to the ControlGroup class.

The setting is exposed as a check box in the QGroupBox instance that visualises the ControlGroup instance.
The setting is saved under "[control group name]/Enabled", but only when it is "false". The default value is "true".

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

@@ -4,8 +4,10 @@
 
 #include "DolphinQt/Config/Mapping/MappingWidget.h"
 
+#include <QCheckBox>
 #include <QFormLayout>
 #include <QGroupBox>
+#include <QLabel>
 #include <QPushButton>
 #include <QTimer>
 
@@ -138,6 +140,28 @@ QGroupBox* MappingWidget::CreateGroupBox(const QString& name, ControllerEmu::Con
       form_layout->addRow(tr(setting->GetUIName()), setting_widget);
   }
 
+  if (group->can_be_disabled)
+  {
+    QLabel* group_enable_label = new QLabel(tr("Enable"));
+    QCheckBox* group_enable_checkbox = new QCheckBox();
+    group_enable_checkbox->setChecked(group->enabled);
+    form_layout->insertRow(0, group_enable_label, group_enable_checkbox);
+    auto enable_group_by_checkbox = [group, form_layout, group_enable_label,
+                                     group_enable_checkbox] {
+      group->enabled = group_enable_checkbox->isChecked();
+      for (int i = 0; i < form_layout->count(); ++i)
+      {
+        QWidget* widget = form_layout->itemAt(i)->widget();
+        if (widget != nullptr && widget != group_enable_label && widget != group_enable_checkbox)
+          widget->setEnabled(group->enabled);
+      }
+    };
+    enable_group_by_checkbox();
+    connect(group_enable_checkbox, &QCheckBox::toggled, this, enable_group_by_checkbox);
+    connect(this, &MappingWidget::ConfigChanged, this,
+            [group_enable_checkbox, group] { group_enable_checkbox->setChecked(group->enabled); });
+  }
+
   return group_box;
 }
 

Source/Core/InputCommon/ControllerEmu/ControlGroup/ControlGroup.cpp

@@ -15,13 +15,16 @@
 
 namespace ControllerEmu
 {
-ControlGroup::ControlGroup(std::string name_, const GroupType type_)
-    : name(name_), ui_name(std::move(name_)), type(type_)
+ControlGroup::ControlGroup(std::string name_, const GroupType type_, CanBeDisabled can_be_disabled_)
+    : name(name_), ui_name(std::move(name_)), type(type_),
+      can_be_disabled(can_be_disabled_ == CanBeDisabled::Yes)
 {
 }
 
-ControlGroup::ControlGroup(std::string name_, std::string ui_name_, const GroupType type_)
-    : name(std::move(name_)), ui_name(std::move(ui_name_)), type(type_)
+ControlGroup::ControlGroup(std::string name_, std::string ui_name_, const GroupType type_,
+                           CanBeDisabled can_be_disabled_)
+    : name(std::move(name_)), ui_name(std::move(ui_name_)), type(type_),
+      can_be_disabled(can_be_disabled_ == CanBeDisabled::Yes)
 {
 }
 
@@ -43,6 +46,10 @@ void ControlGroup::LoadConfig(IniFile::Section* sec, const std::string& defdev,
 {
   const std::string group(base + name + "/");
 
+  // enabled
+  if (can_be_disabled)
+    sec->Get(group + "Enabled", &enabled, true);
+
   for (auto& setting : numeric_settings)
     setting->LoadFromIni(*sec, group);
 
@@ -88,6 +95,9 @@ void ControlGroup::SaveConfig(IniFile::Section* sec, const std::string& defdev,
 {
   const std::string group(base + name + "/");
 
+  // enabled
+  sec->Set(group + "Enabled", enabled, true);
+
   for (auto& setting : numeric_settings)
     setting->SaveToIni(*sec, group);
 

Source/Core/InputCommon/ControllerEmu/ControlGroup/ControlGroup.h

@@ -48,8 +48,16 @@ enum class GroupType
 class ControlGroup
 {
 public:
-  explicit ControlGroup(std::string name, GroupType type = GroupType::Other);
-  ControlGroup(std::string name, std::string ui_name, GroupType type = GroupType::Other);
+  enum class CanBeDisabled
+  {
+    No,
+    Yes,
+  };
+
+  explicit ControlGroup(std::string name, GroupType type = GroupType::Other,
+                        CanBeDisabled can_be_disabled = CanBeDisabled::No);
+  ControlGroup(std::string name, std::string ui_name, GroupType type = GroupType::Other,
+               CanBeDisabled can_be_disabled = CanBeDisabled::No);
   virtual ~ControlGroup();
 
   virtual void LoadConfig(IniFile::Section* sec, const std::string& defdev = "",
@@ -79,7 +87,9 @@ public:
   const std::string name;
   const std::string ui_name;
   const GroupType type;
+  const bool can_be_disabled;
 
+  bool enabled = true;
   std::vector<std::unique_ptr<Control>> controls;
   std::vector<std::unique_ptr<NumericSettingBase>> numeric_settings;
 };