--[[ /*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2021 William Wilgus * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ ]] if not rb.lcd_framebuffer then rb.splash(rb.HZ, "No Support!") return nil end menu_ctx = {} local last_ctx = false local p_settings --[[root menu tables expanded menus get inserted / removed and context menus replace them but never overwritten unless you want a new root menu ]] menu_t = {} func_t = {} require("printmenus") local BUTTON = require("menubuttons") local last_sel = 0 local function display_context_menu() end -- forward declaration local function dpad(x, xi, xir, y, yi, yir, timeout, overflow, selected) local scroll_is_fixed = overflow ~= "manual" if timeout == nil then timeout = -1 end local cancel, select = 0, 0 local x_chg, y_chg = 0, 0 local button while true do button = rb.get_plugin_action(timeout) if button == BUTTON.CANCEL then cancel = 1 break; elseif button == BUTTON.EXIT then cancel = 1 break; elseif button == BUTTON.SEL then last_sel = 1 timeout = timeout + 1 elseif button == BUTTON.SELR then last_sel = 2 if display_context_menu(selected or -1) == true then select = 1 break; end timeout = timeout + 1 elseif button == BUTTON.SELREL then if last_sel == 1 then select = 1 end last_sel = 0 timeout = timeout + 1 elseif button == BUTTON.LEFT then x_chg = x_chg - xi if scroll_is_fixed then cancel = 1 break; end elseif button == BUTTON.LEFTR then x_chg = x_chg - xir elseif button == BUTTON.RIGHT then x_chg = x_chg + xi if scroll_is_fixed then select = 1 timeout = timeout + 1 end elseif button == BUTTON.RIGHTR then x_chg = x_chg + xir elseif button == BUTTON.UP then y_chg = y_chg + yi elseif button == BUTTON.UPR then y_chg = y_chg + yir elseif button == BUTTON.DOWN then y_chg = y_chg - yi elseif button == BUTTON.DOWNR then y_chg = y_chg - yir elseif timeout >= 0 then--and rb.button_queue_count() < 1 then break; end if x_chg ~= 0 or y_chg ~= 0 then timeout = timeout + 1 end end x = x + x_chg y = y + y_chg return cancel, select, x_chg, x, y_chg, y, 0xffff end -- dpad local function menu_set_defaults(settings, ctx) p_settings = settings or {wrap = true, hasheader = true, justify = "left", dpad_fn = dpad} menu_ctx = ctx or {collapse_fn = {}, lv = 0, update = false, start = 1} end local function ctx_loop() local loopfn = ctx_loop ctx_loop = function() end --prevent another execution local mt, ft = get_menu() local i repeat if menu_ctx.update then mt, ft = get_menu(); menu_ctx.update = false end _, i = print_menu(mt, ft, menu_ctx.start, p_settings) until menu_ctx.quit ctx_loop = loopfn --restore for another run end function get_menu() return menu_t, func_t end local function push_ctx(new_getmenu) last_ctx = last_ctx or {} table.insert(last_ctx, menu_ctx) menu_ctx.getmenu = get_menu menu_ctx.settings = p_settings --menu_ctx is a new variable after this point menu_set_defaults() menu_ctx.update = true if type(new_getmenu) == 'function' then get_menu = new_getmenu end end local function pop_ctx() menu_ctx = table.remove(last_ctx) if menu_ctx then get_menu = menu_ctx.getmenu p_settings = menu_ctx.settings if menu_ctx.restorefn then menu_ctx.restorefn(menu_t, func_t) menu_ctx.restorefn = nil end menu_ctx.getmenu = nil menu_ctx.settings = nil menu_ctx.update = true return true end end local function display_context_menu_internal(sel) if sel <= 0 or not menu_ctx.user_context_fn then return false end local parent = get_parent() or 0 local user_context_fn = menu_ctx.user_context_fn local function display_context_menu(i, menu_t, func_t) local function new_getmenu() local mt, ft = user_context_fn(parent, i, menu_t, func_t) ft[0] = pop_ctx --set back fn return mt, ft end push_ctx(new_getmenu) return true end local funct = func_t[sel] local function restore_fn(mt, ft) ft[sel] = funct menu_ctx.start = sel - 1 end menu_ctx.restorefn = restore_fn -- insert into the current fn table so it gets execd by the menu func_t[sel] = display_context_menu return true end function get_parent(lv) lv = lv or #menu_ctx.collapse_fn collectgarbage("step") local t = menu_ctx.collapse_fn[lv] or {} return t[2] or -1 end function set_menu(mt, ft, user_context_fn, settings) local function empty_fn() end menu_set_defaults(settings) if type(user_context_fn) == 'function' then display_context_menu = display_context_menu_internal menu_ctx.user_context_fn = user_context_fn else display_context_menu = empty_fn menu_ctx.user_context_fn = false end p_settings = settings or p_settings menu_t, func_t = mt, ft ctx_loop() end function create_sub_menu(lv, mt, ft) if lv < 1 then error("Level < 1") end -- everything in lua is 1 based menu level is no exception local lv_tab = string.rep ("\t", lv) local function submenu_closure(i, m, f) menu_ctx.lv = lv local lv_out, menusz_out, start_item local item_in, item_out = i, i if lv <= #menu_ctx.collapse_fn then --something else expanded?? repeat local collapse_fn = table.remove(menu_ctx.collapse_fn) if collapse_fn then lv_out, item_out, menusz_out = collapse_fn[1](i, m, f) -- if the item i is below this menu, it needs to shift too if item_in > item_out then i = i - (menusz_out) end end until not collapse_fn or lv >= lv_out menu_ctx.start = i if item_out == item_in then return end end local menu_sz = #mt menu_ctx.start = i start_item = i menu_ctx.update = true for item, _ in ipairs(mt) do i = i + 1 table.insert(m, i, lv_tab .. mt[item]) table.insert(f, i, ft[item]) end local function collapse_closure(i, m, f) --creates a closure around lv, start_item and menu_sz for j = 1, menu_sz, 1 do table.remove(m, start_item + 1) table.remove(f, start_item + 1) end return lv, start_item, menu_sz end table.insert(menu_ctx.collapse_fn, lv, {collapse_closure, start_item}) return true end return submenu_closure end