Update olcPixelGameEngine.h

olcPixelGameEngine.h

@@ -4732,11 +4732,19 @@ namespace olc
 
 		// Windows Event Handler - this is statically connected to the windows event system
 		static LRESULT CALLBACK olc_WindowEvent(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+		static BOOL bTrackMouseEventSet = FALSE;
+		switch (uMsg)
 		{
-			switch (uMsg)
-			{
-			case WM_MOUSEMOVE:
+		case WM_MOUSEMOVE:
+		{
+			if (!bTrackMouseEventSet)
 			{
+				bTrackMouseEventSet = TRUE;
+				TRACKMOUSEEVENT tme{ sizeof(TRACKMOUSEEVENT), TME_LEAVE, hWnd }; TrackMouseEvent(&tme);
+				ptrPGE->olc_UpdateMouseState(0, wParam == MK_LBUTTON);
+				ptrPGE->olc_UpdateMouseState(1, wParam == MK_RBUTTON);
+				ptrPGE->olc_UpdateMouseState(2, wParam == MK_MBUTTON);
+			}
 				// Thanks @ForAbby (Discord)
 				uint16_t x = lParam & 0xFFFF; uint16_t y = (lParam >> 16) & 0xFFFF;
 				int16_t ix = *(int16_t*)&x;   int16_t iy = *(int16_t*)&y;
@@ -4745,7 +4753,7 @@ namespace olc
 			}
 			case WM_SIZE:       ptrPGE->olc_UpdateWindowSize(lParam & 0xFFFF, (lParam >> 16) & 0xFFFF);	return 0;
 			case WM_MOUSEWHEEL:	ptrPGE->olc_UpdateMouseWheel(GET_WHEEL_DELTA_WPARAM(wParam));           return 0;
-			case WM_MOUSELEAVE: ptrPGE->olc_UpdateMouseFocus(false);                                    return 0;
+			case WM_MOUSELEAVE: bTrackMouseEventSet = FALSE; ptrPGE->olc_UpdateMouseFocus(false);       return 0;
 			case WM_SETFOCUS:	ptrPGE->olc_UpdateKeyFocus(true);                                       return 0;
 			case WM_KILLFOCUS:	ptrPGE->olc_UpdateKeyFocus(false);                                      return 0;
 			case WM_KEYDOWN:	ptrPGE->olc_UpdateKeyState(mapKeys[wParam], true);                      return 0;