Author Topic: CalGUI -- A GUI library by flyingfisch (Read 31821 times)

flyingfisch · « **Reply #60 on:** January 06, 2012, 10:33:16 am »

LuaFX is almost exactly the same as lua 5.1. I guess you could make it event based somehow...But yeah, I think you have to do loops

flyingfisch · « **Reply #61 on:** January 06, 2012, 11:05:07 am »

Bug report!

After procrastinating for a day, i decided to test the lua classes code with this program:

Code: [Select]

local print = graydraw.print

class = function(prototype)
    local derived = {}
    local derivedMT = {
        __index = prototype,
        __call  = function(proto, ...)
            local instance = {}
            local instanceMT = {
                __index = derived,
                __call = function()
                    return nil, "ERROR: Attempt to invoke an instance of a class"
                end,
            }
            setmetatable(instance, instanceMT)
            if instance.init then
                instance:init(...)
            end
            return instance
        end,
    }
    setmetatable(derived, derivedMT)
    return derived
end

car = class()

function car: init(power, type, lights, etc)
    self.power = power
    self.type = type
    self.lights = lights*2
    self.options = etc
end

jeep = car(60, "4x4", 12, {air-conditioning = False, trailer-hook = True})

if jeep.options.trailer-hook then
   print("The jeep can have a trailer")
else
   print("No trailer for you :(")
end

And....I get an error:

Code: [Select]

[string 'experiment.lua']:35: '}' expected near '='

So is there a problem with my code, luaFX, or the lua class code?

Nick · « **Reply #62 on:** January 06, 2012, 11:06:34 am »

try to remove the spaces, and if that does not work, place quotation mark around the air-conditioning and if that doe not work place [" "] around ari conditioning and if that does not work you're lost xp

flyingfisch · « **Reply #63 on:** January 06, 2012, 11:16:45 am »

Well, apparently it did not like the dashes. But now I get another error with this code

Code: [Select]

local print = graydraw.print

class = function(prototype)
    local derived = {}
    local derivedMT = {
        __index = prototype,
        __call  = function(proto, ...)
            local instance = {}
            local instanceMT = {
                __index = derived,
                __call = function()
                    return nil, "ERROR: Attempt to invoke an instance of a class"
                end,
            }
            setmetatable(instance, instanceMT)
            if instance.init then
                instance:init(...)
            end
            return instance
        end,
    }
    setmetatable(derived, derivedMT)
    return derived
end

car = class()

function car: init(power, type, lights, etc)
    self.power = power
    self.type = type
    self.lights = lights*2
    self.options = etc
end

jeep = car(60, "4x4", 12, {airconditioning = false,trailerhook = true})
if jeep.trailerhook then
   print("The jeep can have a trailer")
else
   print("No trailer for you :(")
end

Error message:

Code: [Select]

[string 'experiment.lua']:22: Attempt to call global 'setmetatable', a nil value

jwalker · « **Reply #64 on:** January 06, 2012, 11:23:03 am »

maybe its something with LuaFX...
the way you used setmetatable works on oclua...

flyingfisch · « **Reply #65 on:** January 06, 2012, 11:26:25 am »

oclua?

Adriweb · « **Reply #66 on:** January 06, 2012, 11:37:20 am »

o_O

setmetatable() is a native lua function ....

( http://lua-users.org/wiki/MetamethodsTutorial )

What version of Lua are you using ?
That may be the problem...

Also, I know there are some encoding problem with Omnimaga codes in posts.

Here's the class function, that you can again copy/paste, maybe it will work this time ?
http://pastebin.com/9gTmaKKK

flyingfisch · « **Reply #67 on:** January 06, 2012, 11:42:27 am »

I guess this is why luaFX is called beta right now.

I'll have to ask eiyeron to talk to veb about it for me.

jwalker · « **Reply #68 on:** January 06, 2012, 11:59:22 am »

oclua is the nspire on-calc lua programming stuff

flyingfisch · « **Reply #69 on:** January 06, 2012, 12:01:08 pm »

Oh, ok. So On-Calc lua. ok

Nick · « **Reply #70 on:** January 06, 2012, 12:09:03 pm »

well, flyingfisch, don't feel like making one too? could be very useful..

flyingfisch · « **Reply #71 on:** January 06, 2012, 12:29:54 pm »

Quote from: Nick on January 06, 2012, 12:09:03 pm

well, flyingfisch, don't feel like making one too? could be very useful..

On-calc lua editor? Yeah, I think I'll try that when I learn C/C++. Which I should probably do pretty soon.

Which language do you think I should learn? C or C++? They both make addins.

Nick · « **Reply #72 on:** January 06, 2012, 12:31:25 pm »

i asked myself that question too, most people say C++, dunno why, but it's true..

btw: i don't know the difference..

flyingfisch · « **Reply #73 on:** January 06, 2012, 12:35:46 pm »

Quote from: Nick on January 06, 2012, 12:31:25 pm

i asked myself that question too, most people say C++, dunno why, but it's true..

btw: i don't know the difference..

neither do I

I think I'll just stick with lua and make the on-calc editor in lua when we get the ability to write programs from a lua file.

jwalker · « **Reply #74 on:** January 06, 2012, 01:07:08 pm »

I am doing both

Author Topic: CalGUI -- A GUI library by flyingfisch (Read 31821 times)

flyingfisch

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