some question

Sylfir · 2022-06-27T19:26:49+02:00

Hello, i used ZeroBrane with love 2D before. This LuaRT studio is interesting for me but there are som questions i have. 1) Can i build exe from the project?...

cos00kun

yeah.. The right widget. I didn't notice, it's my fault sorry ☺️

cos00kun

local combobox_T={}

local ui = require "ui"
local win = ui.Window("Win", 500, 300)
local comboboxMain = ui.Combobox(win,{"1", "2", "3", "4", "5", "6" } , 20, 20)
win:show()

function comboboxMain:onSelect()
	for i=1, #combobox_T do
		combobox_T={nil}
	end
	local combobox_T={}
	
	local y= 0
	for i=1, tonumber(comboboxMain.text) do
		y= y + 25
		combobox_T[i] = ui.Combobox(win,{"1", "2", "3"}, 140, y)
	end
end

repeat
	ui.update()
until not win.visible

I have a problem with the above codes.
For example, in the combobox I created with the name comboboxMain, I chose the value 5, then I create these 5 new comboboxes (I put them in the table so I don't encounter string name problems combobox_T={} ). now my goal is this! When I choose a new value from the comboboxMain again (for example 3), I want the new comboboxes that I defined before to be deleted and re-created according to the 3 values I specified. that is, delete all comboboxes except somboboxMain and create these comboboxes again according to the value I have just set.

cos00kun

I can do this with the :hide() events, but my goal is not to hide the formed comoboboxes, but to ensure that they are completely reproduced..

Samir

To achieve this, you should replace :

for i=1, #combobox_T do
     combobox_T={nil}
end

With :

for i=1, #combobox_T do
    ui.remove(combobox_T[i])
end

cos00kun

I applied this change but the old comboboxes still show up..

Samir

Thank you for your feedback cos00kun, it might be related to a bug. I will investigate it.

cos00kun

local ui = require "ui"

local win_1 = ui.Window("Win_1", 250, 90)
local win_2 = ui.Window("Win_2", 250, 90)
local button_1 = ui.Button(win_1, "Go Win 2", 35)
local button_2 = ui.Button(win_2, "Go Win 1", 35)
win_1:show()

function button_1:onClick()
	win_2:show()
	win_1:hide()  --- !!!! 
end

function button_2:onClick()
	win_1:show()
	win_2:hide()
end

repeat
	ui.update()
until not win_1.visible

When I hide this first window win_1:hide() , the program closes or all windows disappear.

Samir

Yes it's expected in your event loop that breaks when the win_1 Window is no more visible :

repeat
	ui.update()
until not win_1.visible

cos00kun

In this case, I think you will need to develop the :close methods 🙂

Samir

I know what you mean. I have a better idea but it's too soon to talk about it 😉

cos00kun

some questions 🙂
1) Is there a use for print in LuaRT?
2) Is there a use like excel tables in LuaRT?

Samir

cos00kun

1) Yes you can use the print() function as in standard Lua but it may print malformed characters for some UTF8 encoded strings (the writes functions from the console module provides a better support for UTF8 strings)

2) LuaRT does not provide direct access to xls, xlsx or csv Excel sheets, but it should be possible to use a sys.COM object for that

cos00kun

What I meant by print was about the page output layouts from the printer. I may have misrepresented. 😊

Samir

LuaRT does not have "printing" capabilities built in, but it should be possible using a sys.COM object.

cos00kun

hmmm okey I understand. thank's [Login to see the link]

cos00kun

I started looking into the sys module. I have a goal. I want to take certain values from a text file and process them in the program. What is the way to go for this?
For example, the content of the file.txt file is as follows;

Flight=
{
	["modulation"] = 0,
	["task"] = "CAP",
	["uncontrolled"] = false,
	["route"] = 
	{
		["points"] = 
		{
			[1] = 
			{
				["alt_type"] = "BARO",
				["speed"] = 138.88888888889,
				["task"] = 
				{
					["id"] = "ComboTask",
					["params"] = 
					{
						["tasks"] = 
						{
							[1] = 
							{
								["key"] = "CAP",
								["id"] = "EngageTargets",
								["number"] = 1,
								["auto"] = true,
							}, -- end of [1]
							[2] = 
							{
								["enabled"] = true,
								["id"] = "WrappedAction",
								["number"] = 2,
							}, -- end of [2]
						}
					}
				}
			}
		}
	}
}

How can I set the value of "Flight.route.points[1].task.id" to a variable?

cos00kun

local file = sys.File("file.txt")
file:open()
for line in file.lines do
	print(line)
end

yes, but how do I find the value I'm looking for from these incoming posts and assign it to a variable?

Samir

Hi cos00kun,

There are two kind of ways to achieve this.

The simplest way to do this is to use a Lua file ("file.lua") to store the Flight variable as a table :

Flight = {
	["modulation"] = 0,
	["task"] = "CAP",
	["uncontrolled"] = false
        ...
}

To use this file and get the Flight variable, just use the following code

dofile("file.lua")

But this simple method exposes your program to vulnerabilites, if someone insert Lua code in it.

The second way, more secure, is to use the sys.File object to parse the file.txt and get all the fields, and subfields of the Flight table, but it's rather complex (kind of creating a Lua parser).

You can also create a JSON format table and read it using the sys.COM object (see the json.lua example).
The sys .COM object will read it seamlessly as a table.

cos00kun

hmm okey. What is the difference between dofile("file.lua") and require

Samir

Dofile() will execute a Lua source file at each call

Require() will execute it once and return the value returned by the source file

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