Method onMouseUp

src/openrct2-ui/windows/LoadSave.cpp:799–901

        }

        void onMouseUp(WidgetIndex widgetIndex) override
        {
            bool isSave = action == LoadSaveAction::save;
            switch (widgetIndex)
            {
                case WIDX_CLOSE:
                    InvokeCallback(ModalResult::cancel, "");
                    close();
                    break;

                case WIDX_PARENT_FOLDER:
                    PopulateList(_parentDirectory, _extensionPattern);
                    initScrollWidgets();
                    numListItems = static_cast<uint16_t>(_listItems.size());
                    break;

                case WIDX_NEW_FOLDER:
                    WindowTextInputRawOpen(
                        this, WIDX_NEW_FOLDER, STR_FILEBROWSER_ACTION_NEW_FOLDER, STR_FILEBROWSER_FOLDER_NAME_PROMPT, {}, "",
                        64);
                    break;

                case WIDX_SYSTEM_BROWSER:
                {
                    u8string path = OpenSystemFileBrowser(isSave, type, _directory, _defaultPath, _trackDesign);
                    if (!path.empty())
                    {
                        Select(path.c_str(), action, type, _trackDesign);
                    }
                    else
                    {
                        // If user cancels file dialog, refresh list
                        PopulateList(_directory, _extensionPattern);
                        initScrollWidgets();
                        numListItems = static_cast<uint16_t>(_listItems.size());
                    }
                }
                break;

                case WIDX_SORT_NAME:
                    if (Config::Get().general.loadSaveSort == FileBrowserSort::nameAscending)
                    {
                        Config::Get().general.loadSaveSort = FileBrowserSort::nameDescending;
                    }
                    else
                    {
                        Config::Get().general.loadSaveSort = FileBrowserSort::nameAscending;
                    }
                    Config::Save();
                    SortList();
                    invalidate();
                    break;

                case WIDX_SORT_SIZE:
                    if (Config::Get().general.loadSaveSort == FileBrowserSort::sizeDescending)
                    {
                        Config::Get().general.loadSaveSort = FileBrowserSort::sizeAscending;
                    }