Method onScrollMouseDown

src/openrct2-ui/windows/LoadSave.cpp:1039–1077

        }

        void onScrollMouseDown(int32_t scrollIndex, const ScreenCoordsXY& screenCoords) override
        {
            int32_t selectedItem;

            selectedItem = screenCoords.y / kScrollableRowHeight;
            if (selectedItem >= numListItems)
                return;

            if (_listItems[selectedItem].type == FileType::directory)
            {
                // The selected item is a folder
                numListItems = 0;
                selectedListItem = -1;

                char directory[MAX_PATH];
                String::safeUtf8Copy(directory, _listItems[selectedItem].path.c_str(), sizeof(directory));

                PopulateList(directory, _extensionPattern);
                initScrollWidgets();

                numListItems = static_cast<uint16_t>(_listItems.size());
            }
            else // FileType::file
            {
                // Load or overwrite
                String::set(_currentFilename, std::size(_currentFilename), _listItems[selectedItem].name.c_str());
                invalidateWidget(WIDX_FILENAME_TEXTBOX);

                if (action == LoadSaveAction::save)
                {
                    WindowOverwritePromptOpen(
                        _listItems[selectedItem].name, _listItems[selectedItem].path, action, type, _trackDesign);
                }
                else
                {
                    Select(_listItems[selectedItem].path.c_str(), action, type, _trackDesign);
                }
            }
        }

        void onScrollDraw(int32_t scrollIndex, RenderTarget& rt) override
        {