Need help with tables

Anatoly

This is my code:

CreateTopicPage = class()

function CreateTopicPage:init()
    self.text = {title = "Title here", message = "Message is here and\nnew line testnction"}
    self.buttons = {"q","w","e","r","t","y","u","i","o","p","a","s","d","f","g","h","j","k","l","z","x","c","v","b","m",",",".","?", "1", "2","3","4","5","6","7", "8", "9", "0"}
    self.xy = 64
end

function CreateTopicPage:draw()
    fill(textcolor)
    font("Arial-BoldMT")
    text(self.text.title, 500, 625)
    for x = 1, 14 do
        self.buttons[x] = {}
        for y = 1, 3 do
            self.buttons[x][y] = {}
            strokeWidth(0)
            fill(255, 255, 255, 255)
            rect(x * self.xy, y * self.xy, self.xy, self.xy)
            fill(textcolor)
            text(#self.buttons, x * self.xy + self.xy/2, y * self.xy + self.xy/2)
        end
    end
end

function CreateTopicPage:touched(t)

end

function CreateTopicPage:keyboard(key)

end

I want to know how to place instead text(#self.buttons, x * self.xy + self.xy/2, y * self.xy + self.xy/2) the letters that are called in the table self.buttons = {"q","w","e","r","t","y","u","i","o","p","a","s","d","f","g","h","j","k","l","z","x","c","v","b","m",",",".","?", "1", "2","3","4","5","6","7", "8", "9", "0"}

Ignatz

try this

function CreateTopicPage:draw()
    fill(textcolor)
    font("Arial-BoldMT")
    text(self.text.title, 500, 625)
    local n=0  --<<<<<
    for x = 1, 14 do
        self.buttons[x] = {}
        for y = 1, 3 do
            n=n+1  --<<<<
            --self.buttons[x][y] = {}  --<<<<
            strokeWidth(0)
            fill(255, 255, 255, 255)
            rect(x * self.xy, y * self.xy, self.xy, self.xy)
            fill(textcolor)
            text(self.buttons[n], x * self.xy + self.xy/2, y * self.xy + self.xy/2)
        end
    end
end

Anatoly

@Ignatz it is returning now this error:

CreatePost:23: bad argument #1 to 'text' (string expected, got table)
stack traceback:
    [C]: in function 'text'
    CreatePost:23: in method 'draw'
    Main:38: in function 'draw'

Ignatz

@TokOut - you have to learn to debug code, yourself. Try to work out what is going wrong,

Anatoly

What I understand: You gave me an example where self.buttons[n] is a table but a string is expected

Ignatz

The reason is that you have TWO (2) tables with the name self.buttons. One has keyboard characters, the other is a table of x,y positions.

Anatoly

It works now, how to make now the touch? @Ignatz, Thx for help!

CreateTopicPage = class()

function CreateTopicPage:init()
    self.text = {title = "Title here", message = "Message is here and\nnew line testnction"}
    self.buttons = {}
    self.letters = {"q","w","e","r","t","y","u","i","o","p","a","s","d","f","g","h","j","k","l","z","x","c","v","b","m",",",".","!","1", "2","3","4","5","6","7", "8", "9", "0","?","RET","BACK",""}
    self.xy = 64
end

function CreateTopicPage:draw()
    fill(textcolor)
    font("Arial-BoldMT")
    text(self.text.title, 500, 625)
    local n=0
    for y = 1, 3 do
        self.buttons[y] = {}
        for x = 1, 14 do
            n=n+1
            strokeWidth(0)
            fill(255, 255, 255, 255)
            rect(x * self.xy, y * self.xy, self.xy, self.xy)
            fill(textcolor)
            text(self.letters[n], x * self.xy + self.xy/2, y * self.xy + self.xy/2)
        end
    end
end

function CreateTopicPage:touched(t)

end

function CreateTopicPage:keyboard(key)

end

Ignatz

What don't you understand about touch?

Anatoly

I mean how to specify the buttons action I know that you can make them with for x = the same as in draw, but how to make the action of them?

Ignatz

I've explained this in blog posts and my ebooks, and there are lots of posts about touch.

Please do some reading before asking someone to write the code for you. We don't have time to explain everything to every new person. We expect you to learn what you can, then try to write the code.

Anatoly

Ok, where is it located?

Ignatz

I've told you more than once where my blog posts and my ebooks are

You can also search the forum

Anatoly

@Ignatz, this error appears by using your ebook:

Access to this link has been disabled. Please ask the owner of the shared link to send a new link to access the file or the folder.

Ignatz

https://coolcodea.wordpress.com/2013/06/19/index-of-posts/#more-8884

Anatoly

So I made a the touch function, but how to make instead if a==7 and b==2 then

Plz help, Thx!

function CreateTopicPage:touched(t)
    for y = 1, 3 do
        self.buttons[y] = {}
        for x = 1, 14 do
            if t.x>x*self.xy and t.x<x*self.xy+self.xy and t.y>y*self.xy and t.y<y*self.xy+self.xy then
                local a = x
                local b = y
                print(a .. "," .. b)
            end
        end
    end
end

Anatoly

Help plz!

dave1707

It's time you start helping yourself. There's tutorials on buttons, tutorials on touch, plus plenty of examples of both of them on the forum. You've been on the forum for 2 months, and everything you're asking about is just basic programming. You didn't make a touch function, you just put a bunch of code in a function called touched(). How does the code in the question you asked relate to anything in the code you posted for touch. You want help, READ THE TUTORIALS, and practice with small programs. Once you understand the basics, you can write the programs you want without asking for help.

Anatoly

I am pretty sure this could be make shorter. I made it myself ;-(

function CreateTopicPage:touched(t)
    local n = 0
    for y = 1, 3 do
        self.buttons[y] = {}
        for x = 1, 14 do
            n = n + 1
            if t.x>x*self.xy and t.x<x*self.xy+self.xy and t.y>y*self.xy and t.y<y*self.xy+self.xy and t.state == BEGAN then
                local y = y
                print(x .. "," .. y)
                if x == 14 and y == 3 then
                    -- Post
                    self:post()
                elseif x == 13 and y == 3 then
                    -- Back
                    if self.selected == 1 then
                        if string.len(self.text.title)>=1 then
                            self.text.title = string.sub(self.text.title, 1, string.len(self.text.title)-1)
                        end
                    else
                        if string.len(self.text.message)>=1 then
                            self.text.message = string.sub(self.text.message, 1, string.len(self.text.message)-1)
                        else
                            self.selected = 1
                        end
                    end
                elseif x == 12 and y == 3 then
                    -- Return
                    if self.selected == 1 then
                        self.selected = 2
                    else
                        self.text.message = self.text.message .. "\n"
                    end
                else
                    if self.selected == 1 then
                        self.text.title = self.text.title .. self.letters[n]
                    else
                        self.text.message = self.text.message .. self.letters[n]
                    end
                end
            end
        end
    end
end

The nice part is : end end end end end end (6x)

dave1707

Why do you keep posting chunks of code that doesn't mean anything to anyone except you. If the code can be made shorter than make it shorter. I don't think anyone is going to waste their time trying to do it for you.

juce

@TokOut, it looks like you answered your own question about a=7,b=2 - which is good.

Now, making things shorter and better is a skill that can only be acquired with practice. Try it, and then when you fail, try again. At some point, if you are serious about learning to program, you will succeed.

Anatoly

The nice part is here: end end end end end end

Maybe something like
self.letter[n]

Anatoly

@mentioned {Will mention everyone}

How to create objects? I already have the class and all the data, but how to create new objects?

Kjell

@TokOut I'm starting to wonder if you even read the ebooks everyone constantly links you to. They're very clear, and answer a lot of the simple questions you keep posting here.

Once more: the ebook 'Lua for beginners' by Ignatz, chapter 11, tells you all the basic stuff about classes you need to know. It can be found in the wiki or here:

https://www.dropbox.com/sh/mr2yzp07vffskxt/AABlplSGGFBTu8FzQy94lteua/Lua for beginners.pdf

Anatoly

I haven't dropbox

Ignatz

you don't need dropbox.

you can ignore the login message

yojimbo2000

Though Dropbox is by far the easiest way of managing your Codea assets IMO, so should be something every Codea user has.

Anatoly

@yojimbo2000, @Ignatz, markdown and GitHub - better then drop

Ignatz

@TokOut - of course, you would know, being such a Codea expert

Anatoly

Keyboard class: < Codea Ralk is better! >

KeyBoard = class()

function KeyBoard:init()
    -- You can accept and set parameyers here
    -- To make the key visible if you have in setup "k = KeyBoard()" then use "k.visible = true"
    self.visible = false
    self.textSize = 25
    self.xy = 68
    self.letters = {"1","z","a","q","2","x","s","w","3","c","d","e","4","v","f","r","5","b","g","t","6","n","h","y","7","m","j","u","8", ",","k","i","9",".","l", "o", "0", "!","?","p","_",'"',"(","BCK",";","/",")","RET"}
    self.positions = {}
end

function KeyBoard:draw()
    local n = 0
    if self.visible then
        for x = 1, 12 do
            self.positions[x] = {}
            for y = 1, 4 do
                n = n + 1
                fill(255, 255, 255, 255)
                rect(x * self.xy + self.xy/2, y * self.xy + self.xy/2, self.xy, self.xy)
                fill(0, 0, 0, 255)
                if self.bolden then font("Arial-BoldMT") else font("ArialMT") end
                fontSize(self.textSize)
                text(self.letters[n], x * self.xy + self.xy, y * self.xy + self.xy)
            end
        end
    end
end

function KeyBoard:touched(t)
    if self.visible then
        local n = 0
        for x = 1, 12 do
            self.positions[x] = {}
            for y = 1, 4 do
                n = n + 1
                local y = y
                if t.x>self.xy*x+self.xy/2 and t.x<self.xy*x+self.xy*1.5 and t.y>self.xy*y+self.xy/2 and t.y<self.xy*y+self.xy*1.5 and t.state == BEGAN then
                    print(self.letters[n])
                end
            end
        end
    end
end

Ignatz

Shouldn't the BCK key delete the previous letter?

And shouldn't the class return the whole string?

Anatoly

That's just an example! How to use it will be from you. This could be also used as calculator buttons. But that's just an example, which means only the start code