ltui/tests/utf8dialog.lua

--!A cross-platform terminal ui library based on Lua
--
-- Licensed to the Apache Software Foundation (ASF) under one
-- or more contributor license agreements.  See the NOTICE file
-- distributed with this work for additional information
-- regarding copyright ownership.  The ASF licenses this file
-- to you under the Apache License, Version 2.0 (the
-- "License"); you may not use this file except in compliance
-- with the License.  You may obtain a copy of the License at
--
--     http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-2020, TBOOX Open Source Group.
--
-- @author      ruki, laelnasan
-- @file        utf8dialog.lua
--
require("tests/load")

--  requires
local ltui        = require("ltui")
local label       = ltui.label
local button      = ltui.button
local application = ltui.application
local event       = ltui.event
local rect        = ltui.rect
local boxdialog   = ltui.boxdialog
local textdialog  = ltui.textdialog
local inputdialog = ltui.inputdialog

-- the demo application
local demo = application()

-- init demo
function demo:init()

    -- init name
    application.init(self, "demo")

    -- init background
    self:background_set("blue")

    -- init main dialog
    self:insert(self:dialog_main())

    -- init input dialog
    self:insert(self:dialog_input(), {centerx = true, centery = true})

    -- init tips dialog
    self:insert(self:dialog_tips(), {centerx = true, centery = true})
end

-- main dialog
function demo:dialog_main()
    local dialog_main = self._DIALOG_MAIN
    if not dialog_main then
        dialog_main = boxdialog:new("dialog.main", rect {1, 1, self:width() - 1, self:height() - 1}, "main dialog")
        dialog_main:text():text_set([[LTUI是一个基于lua的跨平台字符终端UI界面库。
此框架源于xmake中图形化菜单配置的需求，类似linux kernel的menuconf去配置编译参数，因此基于curses和lua实现了一整套跨平台的字符终端ui库。 而样式风格基本上完全参照的kconfig-frontends，当然用户也可以自己定制不同的ui风格。]])
        dialog_main:button_add("tips", "< ☝ Tips >", function (v) self:view("dialog.tips"):show(true, {focused = true}) end)
        dialog_main:button_add("input", "< ☺ Input >", function (v) self:view("dialog.input"):show(true, {focused = true}) end)
        dialog_main:button_add("help", "< ☕Help >", function (v) self:insert(self:dialog_help()) end)
        dialog_main:button_add("quit", "< ☠ Quit >", "cm_quit")
        self._DIALOG_MAIN = dialog_main
    end
    return dialog_main
end

-- help dialog
function demo:dialog_help()
    local dialog_help = self._DIALOG_HELP
    if not dialog_help then
        dialog_help = textdialog:new("dialog.help", rect {1, 1, self:width() - 1, self:height() - 1}, "README")
        dialog_help:option_set("scrollable", true)
        local helptext = nil
        local file = io.open("./LICENSE.md", 'r')
        if file then
            helptext = file:read("*a")
            file:close()
        end
        if helptext then
            dialog_help:text():text_set(helptext)
        end
        dialog_help:button_add("exit", "< Exit >", function (v) self:remove(dialog_help) end)
        self._DIALOG_HELP = dialog_help
    end
    return dialog_help
end

-- input dialog
function demo:dialog_input()
    local dialog_input = self._DIALOG_INPUT
    if not dialog_input then
        dialog_input = inputdialog:new("dialog.input", rect {0, 0, 50, 8}):background_set(self:dialog_main():frame():background())
        dialog_input:frame():background_set("cyan")
        dialog_input:text():text_set("please input text:"):textattr_set("red")
        dialog_input:button_add("no", "< No >", function (v) dialog_input:show(false) end)
        dialog_input:button_add("yes", "< Yes >", function (v)
                                                      self:dialog_main():text():text_set(dialog_input:textedit():text())
                                                      dialog_input:show(false)
                                                  end)
        dialog_input:show(false)
        self._DIALOG_INPUT = dialog_input
    end
    return dialog_input
end

-- tips dialog
function demo:dialog_tips()
    local dialog_tips = self._DIALOG_TIPS
    if not dialog_tips then
        dialog_tips = textdialog:new("dialog.tips", rect {0, 0, 50, 8}):background_set(self:dialog_main():frame():background())
        dialog_tips:frame():background_set("cyan")
        dialog_tips:text():text_set("hello ltui! (https://tboox.org)\nA cross-platform terminal ui library based on Lua"):textattr_set("red")
        dialog_tips:button_add("yes", "< Yes >", function (v) dialog_tips:show(false) end)
        dialog_tips:button_add("no", "< No >", function (v) dialog_tips:show(false) end)
        self._DIALOG_TIPS = dialog_tips
    end
    return dialog_tips
end

-- on resize
function demo:on_resize()
    self:dialog_main():bounds_set(rect {1, 1, self:width() - 1, self:height() - 1})
    self:dialog_help():bounds_set(rect {1, 1, self:width() - 1, self:height() - 1})
    self:center(self:dialog_input(), {centerx = true, centery = true})
    self:center(self:dialog_tips(), {centerx = true, centery = true})
    application.on_resize(self)
end

-- run demo
demo:run()