Merge pull request #2968 from FreddyFunk/fix-zl-zr-analog-triggers

yuzu/configure_input_player: Fix input handling for ZL and ZR from controllers with analog triggers

src/yuzu/configuration/configure_input_player.cpp

@@ -245,10 +245,24 @@ ConfigureInputPlayer::ConfigureInputPlayer(QWidget* parent, std::size_t player_i
 
         button->setContextMenuPolicy(Qt::CustomContextMenu);
         connect(button, &QPushButton::clicked, [=] {
-            HandleClick(
-                button_map[button_id],
-                [=](const Common::ParamPackage& params) { buttons_param[button_id] = params; },
-                InputCommon::Polling::DeviceType::Button);
+            HandleClick(button_map[button_id],
+                        [=](Common::ParamPackage params) {
+                            // Workaround for ZL & ZR for analog triggers like on XBOX controllors.
+                            // Analog triggers (from controllers like the XBOX controller) would not
+                            // work due to a different range of their signals (from 0 to 255 on
+                            // analog triggers instead of -32768 to 32768 on analog joysticks). The
+                            // SDL driver misinterprets analog triggers as analog joysticks.
+                            // TODO: reinterpret the signal range for analog triggers to map the
+                            // values correctly. This is required for the correct emulation of the
+                            // analog triggers of the GameCube controller.
+                            if (button_id == Settings::NativeButton::ZL ||
+                                button_id == Settings::NativeButton::ZR) {
+                                params.Set("direction", "+");
+                                params.Set("threshold", "0.5");
+                            }
+                            buttons_param[button_id] = std::move(params);
+                        },
+                        InputCommon::Polling::DeviceType::Button);
         });
         connect(button, &QPushButton::customContextMenuRequested, [=](const QPoint& menu_location) {
             QMenu context_menu;