Making the lines in a multiline text box the text in a list of buttons

[SPL]

I have three buttons, call them A, B, and C (their current text is nothing) a button (call it ADD) and a multiline text box OR every item in a comma separated list (1,2,3, etc). This is what I want:

When I press button ADD that buttons A, B, and C take the name of the lines in the list :

1

2

3

(or 1,2,3 if CSV)

So that button A is renamed 1, B = 2 and C = 3. 

Possible? Been sitting all afternoon.

[Taifun]

It would really help if you provided a screenshot of your relevant blocks, so we can see what you are trying to do, and where the problem may be.

Taifun

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Trying to push the limits of App Inventor! Snippets, Tutorials and Extensions from Pura Vida Apps by Taifun. 

[SPL]

So, what I'm trying to do is this:

1: When I add something (ONE LINE) in the text box, then press ADD, the first button gets that text. Second time (ONE LINE), the second button gets the text and the third time (again, one line) the third button gets the text. It works until the third button. What am I doing wrong? Is there an easier way?

2. If I copy MULTIPLE (3) lines in the textbox and press ADD I want the lines to get the text from the different lines. So if the textbox has the text:

1

2

3

If I then click ADD, I want the buttons to get the numbers 1, 2 and 3 in order. Do you understand?

[Abraham Getzler]

Change your 1,2,3 or 1\n2\n3 into a list x by using a split block.

set buttonA.Text to select item 1 from list x

set buttonB.Text to select item 2 from list x

set buttonC.Text to select item 3 from list x

See Books and Tutorial section of this FAQ:

https://groups.google.com/forum/?utm_medium=email&utm_source=footer#!msg/mitappinventortest/2cd6Uz__xA0/cPQSiZpcDAAJ

ABG

[SPL]

Can you please help me once more? I am a total beginner. So, I managed to do this: When ADD.longclick set button A,B,C text to a,b,c respectively (see picture)

What I have no clue about how to do is to make a new list x from the textbox with , or \n and select the index from the list. 

[Abraham Getzler]

See the How to Work with Lists section of the FAQ I mentioned.

ABG

[SPL]

Thanks! That was really helpful.

 So I've come this far now, any help would is appreciated. I still don't know how to make the split block list, can't find anything in the tutorials and I don't understand the built in help. See attached files.

[Taifun]

use Do it to debug your blocks, see tip 4 here

Top 5 Tips: How to learn App Inventor

it seems to be, you are working with a list of lists instead of a simple list

each bracket pair represents a list...

• How to work with Lists by Saj
• How to work with Lists and Lists of lists (pdf) by appinventor.org

[SPL]

Thank you for the DoIt help and I'm sorry for making another thread.

From the PDF you provided I got some answers. I still can't figure out how to make the multiline text different items in the list, but maybe someday I will.

[Taifun]

you might want to provide a new screenshot of your relevant blocks including Do it results 

and a short description of the issue: how the result currently is and how it should be

Taifun

[Abraham Getzler]

See attached for how to do the split.

You were wrapping the list that came out of the split block with an extra layer of list wrapping, that threw off the selects.

The Line Feed character is \n and you can do the same split as you did on a comma on a Line Feed to get a list.

ABG

[SPL]

Thank you sooo much, it works!

[SPL]

Is there any way I can have both , and \n? If I have both, neither work.

[Abraham Getzler]

Is there any way I can have both , and \n? If I have both, neither work

There's a text block that can replace all \n with commas.

But think of a way to control your input better, so you don't have to deal with both.

On the other hand, is it possible you are being presented with a table when you get both , and \n ?

 If so, look at the csv-to-table block to turn it into a list of lists, if that's what is the shape of your data.

Maybe show us what the data looks like?

ABG

[SPL]

The app is supposed to be a grocery list, where the user puts a list of his/her groceries in the text box and the it generates buttons with each of the item as text. As I can't know if the user separates the items with commas or a new line, I want the option to be both :)

[Abraham Getzler]

Use the replace all text block to change the Newlines to commas,

and run it thru a split at commas.

ABG

[SPL]

Oh, that's smart. Let me try!

THANK YOU! WORKS LIKE A CHARM!

[SPL]

Hey, Taifun, can you merge threads? I want to ask continuing questions, but don't want to start new threads all the time. Can you merge this and my other one into a new one called SPL's Shopping Cart App or something?

[Ghica]

We do not like threads that are very long or that are about multiple subjects, because it is difficult to see when something is answered ans to search through the forum for a specific thing. Of course you can start a thread called SPL's Shopping Cart App and ask anything in it. Taifun will usually complain when he thinks subjects diverge too much.
Cheers, Ghica.