// license:BSD-3-Clause // copyright-holders:Nathan Woods /*************************************************************************** ui/devctrl.h Device specific control menu This source provides a base class for any device which need a specific submenu and which can occur multiple times in the same driver (at the moment, cassette tapes and barcode readers, in future possibly other like printers) The base class contains calls to get the total number of devices of the same kind connected to the driver, and shortcuts to switch current device to next one or previous one attached. This allows, for instance, users to pass from a device to another one by simply pressing left/right and the menu is rebuilt accordingly, without the need of a preliminary submenu listing available devices of the same kind. ***************************************************************************/ #ifndef MAME_FRONTEND_UI_DEVCTRL_H #define MAME_FRONTEND_UI_DEVCTRL_H #pragma once #include "ui/menu.h" namespace ui { template class menu_device_control : public menu { public: menu_device_control(mame_ui_manager &mui, render_container &container, DeviceType *device); protected: DeviceType *current_device() { return m_device; } int count() { return m_count; } int current_index(); void previous(); void next(); std::string current_display_name(); uint32_t current_display_flags(); private: // device enumerator typedef device_type_enumerator enumerator; DeviceType * m_device; int m_count; }; //------------------------------------------------- // ctor //------------------------------------------------- template menu_device_control::menu_device_control(mame_ui_manager &mui, render_container &container, DeviceType *device) : menu(mui, container) { enumerator iter(mui.machine().root_device()); m_count = iter.count(); m_device = device ? device : iter.first(); } //------------------------------------------------- // current_index //------------------------------------------------- template int menu_device_control::current_index() { enumerator iter(machine().root_device()); return iter.indexof(*m_device); } //------------------------------------------------- // previous //------------------------------------------------- template void menu_device_control::previous() { // left arrow - rotate left through devices if (m_device && (1 < m_count)) { enumerator iter(machine().root_device()); int index = iter.indexof(*m_device); if (index > 0) index--; else index = m_count - 1; m_device = iter.byindex(index); reset(reset_options::REMEMBER_POSITION); } } //------------------------------------------------- // next //------------------------------------------------- template void menu_device_control::next() { // right arrow - rotate right through cassette devices if (m_device && (1 < m_count)) { enumerator iter(machine().root_device()); int index = iter.indexof(*m_device); if (index < m_count - 1) index++; else index = 0; m_device = iter.byindex(index); reset(reset_options::REMEMBER_POSITION); } } //------------------------------------------------- // current_display_name //------------------------------------------------- template std::string menu_device_control::current_display_name() { std::string display_name; display_name.assign(current_device()->name()); if (count() > 1) display_name.append(string_format(" %d", current_index() + 1)); return display_name; } //------------------------------------------------- // current_display_flags //------------------------------------------------- template uint32_t menu_device_control::current_display_flags() { uint32_t flags = 0; if (count() > 1) { if (current_index() > 0) flags |= FLAG_LEFT_ARROW; if (current_index() < count() - 1) flags |= FLAG_RIGHT_ARROW; } return flags; } } // namespace ui #endif // MAME_FRONTEND_UI_DEVCTRL_H