[Emulator] Handle left click

include/services/hid.hpp

@@ -49,10 +49,12 @@ class HIDService {
 	u32 oldButtons; // The previous pad state
 
 	s16 circlePadX, circlePadY; // Circlepad state
+	s16 touchScreenX, touchScreenY; // Touchscreen state
 
 	bool accelerometerEnabled;
 	bool eventsInitialized;
 	bool gyroEnabled;
+	bool touchScreenPressed;
 
 	std::array<std::optional<Handle>, 5> events;
 
@@ -116,4 +118,14 @@ public:
 			std::memset(ptr, 0, 0x2b0);
 		}
 	}
+
+	void setTouchScreenPress(u16 x, u16 y) {
+		touchScreenX = x;
+		touchScreenY = y;
+		touchScreenPressed = true;
+	}
+
+	void releaseTouchScreen() {
+		touchScreenPressed = false;
+	}
 };

include/services/service_manager.hpp

@@ -85,9 +85,12 @@ public:
 
 	void signalDSPEvents() { dsp.signalEvents(); }
 
+	// Input function wrappers
 	void pressKey(u32 key) { hid.pressKey(key); }
 	void releaseKey(u32 key) { hid.releaseKey(key); }
 	void setCirclepadX(u16 x) { hid.setCirclepadX(x); }
 	void setCirclepadY(u16 y) { hid.setCirclepadY(y); }
 	void updateInputs(u64 currentTimestamp) { hid.updateInputs(currentTimestamp); }
+	void setTouchScreenPress(u16 x, u16 y) { hid.setTouchScreenPress(x, y); }
+	void releaseTouchScreen() { hid.releaseTouchScreen(); }
 };

src/core/services/hid.cpp

@@ -25,6 +25,7 @@ void HIDService::reset() {
 	accelerometerEnabled = false;
 	eventsInitialized = false;
 	gyroEnabled = false;
+	touchScreenPressed = false;
 
 	// Deinitialize HID events
 	for (auto& e : events) {
@@ -36,6 +37,7 @@ void HIDService::reset() {
 	// Reset button states
 	newButtons = oldButtons = 0;
 	circlePadX = circlePadY = 0;
+	touchScreenX = touchScreenY = 0;
 }
 
 void HIDService::handleSyncRequest(u32 messagePointer) {

src/emulator.cpp

@@ -91,6 +91,32 @@ void Emulator::run() {
                         case SDLK_BACKSPACE: srv.releaseKey(Keys::Select); break;
                     }
                     break;
+
+                case SDL_MOUSEBUTTONDOWN: {
+                    if (event.button.button == SDL_BUTTON_LEFT) {
+                        const s32 x = event.button.x;
+                        const s32 y = event.button.y;
+
+                        // Check if touch falls in the touch screen area
+                        if (y >= 240 && y <= 480 && x >= 40 && x < 40 + 320) {
+                            // Convert to 3DS coordinates
+                            u16 x_converted = static_cast<u16>(x) - 40;
+                            u16 y_converted = static_cast<u16>(y) - 240;
+
+                            srv.setTouchScreenPress(x_converted, y_converted);
+                        }
+                        else {
+                            srv.releaseTouchScreen();
+                        }
+                    }
+                    break;
+                }
+
+                case SDL_MOUSEBUTTONUP:
+                    if (event.button.button == SDL_BUTTON_LEFT) {
+                        srv.releaseTouchScreen();
+                    }
+                    break;
                 }
         }