Minor GUI change to add an option that sets the deadzone for analog sticks

core/input/gamepad_device.h

@@ -70,6 +70,16 @@ class GamepadDevice
 			}
 		}
 	}
+	bool has_analog_stick() const { return hasAnalogStick; }
+	float get_dead_zone() const { return input_mapper->dead_zone; }
+	void set_dead_zone(float deadzone) {
+		if (deadzone != input_mapper->dead_zone)
+		{
+			input_mapper->dead_zone = deadzone;
+			input_mapper->set_dirty();
+			save_mapping();
+		}
+	}
 
 	static void Register(const std::shared_ptr<GamepadDevice>& gamepad);
 
@@ -109,6 +119,7 @@ class GamepadDevice
 	std::string _unique_id;
 	std::shared_ptr<InputMapping> input_mapper;
 	bool rumbleEnabled = false;
+	bool hasAnalogStick = false;
 	int rumblePower = 100;
 	u32 leftTrigger = ~0;
 	u32 rightTrigger = ~0;

core/linux-dist/evdev_gamepad.h

@@ -65,6 +65,7 @@ class EvdevGamepadDevice : public GamepadDevice
 		}
 		else
 			INFO_LOG(INPUT, "using custom mapping '%s'", input_mapper->name.c_str());
+		hasAnalogStick = true;
 	}
 	~EvdevGamepadDevice() override
 	{

core/rend/gui.cpp

@@ -1682,9 +1682,17 @@ static void gui_display_settings()
 						ImGui::SameLine(0, 16 * settings.display.uiScale);
 						int power = gamepad->get_rumble_power();
 						ImGui::SetNextItemWidth(150 * settings.display.uiScale);
-						if (ImGui::SliderInt("Rumble", &power, 0, 100))
+						if (ImGui::SliderInt("Rumble", &power, 0, 100, "%d%%"))
 							gamepad->set_rumble_power(power);
 					}
+					if (gamepad->has_analog_stick())
+					{
+						ImGui::SameLine(0, 16 * settings.display.uiScale);
+						int deadzone = std::round(gamepad->get_dead_zone() * 100.f);
+						ImGui::SetNextItemWidth(150 * settings.display.uiScale);
+						if (ImGui::SliderInt("Dead zone", &deadzone, 0, 100, "%d%%"))
+							gamepad->set_dead_zone(deadzone / 100.f);
+					}
 					ImGui::NextColumn();
 					ImGui::PopID();
 				}

core/sdl/sdl_gamepad.h

@@ -205,6 +205,8 @@ class SDLGamepad : public GamepadDevice
 #else
 		rumbleEnabled = (SDL_JoystickRumble(sdl_joystick, 1, 1, 1) != -1);
 #endif
+
+		hasAnalogStick = SDL_JoystickNumAxes(sdl_joystick) > 0;
 	}
 
 	bool gamepad_axis_input(u32 code, int value) override

core/windows/xinput_gamepad.h

@@ -45,6 +45,7 @@ class XInputGamepadDevice : public GamepadDevice
 		char buf[32];
 		sprintf(buf, "xinput-%d", xinput_port + 1);
 		_unique_id = buf;
+		hasAnalogStick = true;
 	}
 
 	std::shared_ptr<InputMapping> getDefaultMapping() override {

shell/android-studio/flycast/src/main/jni/src/android_gamepad.h

@@ -107,11 +107,13 @@ class AndroidGamepadDevice : public GamepadDevice
 		{
 			input_mapper = std::make_shared<IdentityInputMapping>();
 			rumbleEnabled = true;
+			// hasAnalogStick = true; // TODO has an analog stick but input mapping isn't persisted
 		}
 		else
 		{
 			loadMapping();
 			save_mapping();
+			hasAnalogStick = !fullAxes.empty();
 		}
 	}
 	~AndroidGamepadDevice() override

shell/apple/emulator-ios/emulator/ios_gamepad.h

@@ -229,7 +229,7 @@ class IOSGamepad : public GamepadDevice
 			[gcController.extendedGamepad.rightThumbstick.yAxis setValueChangedHandler:^(GCControllerAxisInput *axis, float value) {
 				gamepad_axis_input(IOS_AXIS_RY, (int)std::roundf(-32767.f * value));
 			}];
-
+			hasAnalogStick = true;
 		}
 		else
 		{
@@ -491,6 +491,7 @@ class IOSVirtualGamepad : public GamepadDevice
 		_name = "Virtual Gamepad";
 		_unique_id = "ios-virtual-gamepad";
 		input_mapper = getDefaultMapping();
+		//hasAnalogStick = true;	// TODO has an analog stick but input mapping isn't persisted
 	}
 
 	bool is_virtual_gamepad() override { return true; }