Make these event watchers

src/frontend/InputSettings.cpp

@@ -2,6 +2,9 @@
 #include <log.hpp>
 #include <SDL3/SDL.h>
 
+bool QueryDevices(void *userdata, SDL_Event *event);
+bool PollGamepad(void *userdata, SDL_Event *event);
+
 InputSettings::InputSettings(nlohmann::json &settings) : settings(settings) {
   int i = 0;
   for(auto& kb : kbButtons) {
@@ -11,6 +14,8 @@ InputSettings::InputSettings(nlohmann::json &settings) : settings(settings) {
 
   devices.addItem({"Keyboard/Mouse"});
   SDL_InitSubSystem(SDL_INIT_GAMEPAD);
+  SDL_AddEventWatch(QueryDevices, this);
+  SDL_AddEventWatch(PollGamepad, this);
 }
 
 bool InputSettings::render() {
@@ -32,9 +37,6 @@ bool InputSettings::render() {
       whichGrabbing = i;
     }
 
-    QueryDevices();
-    PollGamepad();
-
     if((i % 2 == 0) || i == 0) // only go down every 2 buttons... just... i like it this way
       ImGui::SameLine();
 
@@ -56,99 +58,97 @@ std::array<SDL_Keycode, 18> InputSettings::GetMappedKeys() {
   return ret;
 }
 
-void InputSettings::QueryDevices() noexcept {
-  if (!devices.isEnabled())
-    return;
+bool QueryDevices(void *userdata, SDL_Event *event) {
+  auto _this = (InputSettings*)userdata;
+  if (!_this->devices.isEnabled())
+    return false;
 
-  SDL_Event e;
-  while (SDL_PollEvent(&e)) {
-    switch (e.type) {
-    case SDL_EVENT_GAMEPAD_ADDED:
-      {
-        const auto index = e.gdevice.which;
+  switch (event->type) {
+  case SDL_EVENT_GAMEPAD_ADDED:
+    {
+      const auto index = event->gdevice.which;
 
-        const auto gamepad = SDL_OpenGamepad(index);
-        Util::info("Found controller!");
-        const auto serial = SDL_GetGamepadSerial(gamepad);
-        const auto name = SDL_GetGamepadName(gamepad);
-        const auto path = SDL_GetGamepadPath(gamepad);
+      const auto gamepad = SDL_OpenGamepad(index);
+      Util::info("Found controller!");
+      const auto serial = SDL_GetGamepadSerial(gamepad);
+      const auto name = SDL_GetGamepadName(gamepad);
+      const auto path = SDL_GetGamepadPath(gamepad);
 
-        if (name) {
-          if (!gamepadIndexes.contains(index)) {
-            gamepadIndexes[index] = name;
-          }
-          devices.addItem({name});
-        } else if (serial) {
-          if (!gamepadIndexes.contains(index)) {
-            gamepadIndexes[index] = serial;
-          }
-          devices.addItem({serial});
-        } else if (path) {
-          if (!gamepadIndexes.contains(index)) {
-            gamepadIndexes[index] = path;
-          }
-          devices.addItem({path});
+      if (name) {
+        if (!_this->gamepadIndexes.contains(index)) {
+          _this->gamepadIndexes[index] = name;
         }
-
-        SDL_CloseGamepad(gamepad);
+        _this->devices.addItem({name});
+      } else if (serial) {
+        if (!_this->gamepadIndexes.contains(index)) {
+          _this->gamepadIndexes[index] = serial;
+        }
+        _this->devices.addItem({serial});
+      } else if (path) {
+        if (!_this->gamepadIndexes.contains(index)) {
+          _this->gamepadIndexes[index] = path;
+        }
+        _this->devices.addItem({path});
       }
-      break;
-    case SDL_EVENT_GAMEPAD_REMOVED:
-      {
-        const auto index = e.gdevice.which;
 
-        if (gamepadIndexes.contains(index))
-          devices.removeItem(gamepadIndexes[index]);
-      }
-      break;
+      SDL_CloseGamepad(gamepad);
     }
+    return true;
+  case SDL_EVENT_GAMEPAD_REMOVED:
+    {
+      const auto index = event->gdevice.which;
+
+      if (_this->gamepadIndexes.contains(index))
+        _this->devices.removeItem(_this->gamepadIndexes[index]);
+    }
+    return true;
+  default:
+    return false;
   }
 }
 
-void InputSettings::PollGamepad() noexcept {
-  SDL_Event e;
-  while (SDL_PollEvent(&e)) {
-    switch (e.type) {
-    case SDL_EVENT_GAMEPAD_BUTTON_DOWN:
-      {
-        if (!selectedDeviceIsNotKeyboard)
-          return;
-        
-        const auto k = SDL_GetGamepadStringForButton(static_cast<SDL_GamepadButton>(e.gbutton.button));
-        JSONSetField<std::string>(settings, "input", kbButtons[whichGrabbing].getName(), k);
-        kbButtons[whichGrabbing].setLabel(k);
-        devices.setEnabled(true);
-        for (auto &kbButton : kbButtons) {
-          kbButton.setEnabled(true);
-        }
-
-        grabbing = false;
-        whichGrabbing = -1;
-
-        modified = true;
+bool PollGamepad(void *userdata, SDL_Event *event) {
+  auto _this = (InputSettings*)userdata;
+  switch (event->type) {
+  case SDL_EVENT_GAMEPAD_BUTTON_DOWN:
+    {
+      if (!_this->selectedDeviceIsNotKeyboard)
+        return false;
+      
+      const auto k = SDL_GetGamepadStringForButton(static_cast<SDL_GamepadButton>(event->gbutton.button));
+      JSONSetField<std::string>(_this->settings, "input", _this->kbButtons[_this->whichGrabbing].getName(), k);
+      _this->kbButtons[_this->whichGrabbing].setLabel(k);
+      _this->devices.setEnabled(true);
+      for (auto &kbButton : _this->kbButtons) {
+        kbButton.setEnabled(true);
       }
-      break;
-    case SDL_EVENT_KEY_DOWN:
-      {
-        if (selectedDeviceIsNotKeyboard)
-          return;
-        
-        const auto k = SDL_GetKeyName(e.key.key);
-        JSONSetField<std::string>(settings, "input", kbButtons[whichGrabbing].getName(), k);
-        kbButtons[whichGrabbing].setLabel(k);
-        devices.setEnabled(true);
-        for (auto &kbButton : kbButtons) {
-          kbButton.setEnabled(true);
-        }
-    
-        grabbing = false;
-        whichGrabbing = -1;
-    
-        modified = true;
-      }
-      break;
-    default:
-      break;
+
+      _this->grabbing = false;
+      _this->whichGrabbing = -1;
+
+      _this->modified = true;
     }
+    return true;
+  case SDL_EVENT_KEY_DOWN:
+    {
+      if (_this->selectedDeviceIsNotKeyboard)
+        return false;
+      
+      const auto k = SDL_GetKeyName(event->key.key);
+      JSONSetField<std::string>(_this->settings, "input", _this->kbButtons[_this->whichGrabbing].getName(), k);
+      _this->kbButtons[_this->whichGrabbing].setLabel(k);
+      _this->devices.setEnabled(true);
+      for (auto &kbButton : _this->kbButtons) {
+        kbButton.setEnabled(true);
+      }
+  
+      _this->grabbing = false;
+      _this->whichGrabbing = -1;
+  
+      _this->modified = true;
+    }
+    return true;
+  default:
+    return false;
   }
 }

src/frontend/InputSettings.hpp

@@ -6,12 +6,10 @@
 #include <SDL3/SDL.h>
 
 class InputSettings final {
+public:
   bool grabbing = false;
   int whichGrabbing = -1;
 
-  void QueryDevices() noexcept;
-  void PollGamepad() noexcept;
-
   std::unordered_map<u32, std::string> gamepadIndexes{};
   std::array<gui::PushButton, 18> kbButtons = {
     gui::PushButton{"", "A"},
@@ -54,7 +52,6 @@ class InputSettings final {
   //std::unique_ptr<QLabel> devicesLabel = std::make_unique<QLabel>("Device:");
   //std::unique_ptr<QComboBox> devices = std::make_unique<QComboBox>();
   //Q_OBJECT
-public:
   bool render();
   bool selectedDeviceIsNotKeyboard = false;
   explicit InputSettings(nlohmann::json &);