Buttons in array or how.

[Sten Jensby]

Hi

Have 42 buttons arranged like a calender 7 by 6

If first day of month is friday (weekday6) i need to change the text on button to 1.

and for the remaining buttons, so i get a "calendar" 

But i will need som kind of array or loop. 

For button1 to button42 do the following 

check if button1 = first day of month. , if not then button1 is hiding

if button2 = first day of month, write text "1" on button2 text and proceeed to next button 

Ect.

so i will end up with ex 30 visible buttons from 1 to 30, that i can click on.

Any help

[Chris Ward]

Hi Sten

That is a lot of buttons, smart phone screens are small and the buttons need to be big for ease of use. Unless there is an outstanding reason not to, I recommend using the built-in DatePicker. It is what 99% of Android Users will expect to see.......

[Sten Jensby]

I am the last 1 %......

Date picker is not what i need, and the app is for my only. size of buttons and layout is ok for me.

I need a calander function weekly shown, 

4 -5 weeks at a time, ( month).

If something is true in some days, the backcolor should be changing to that, but that's a later issue,

Making arrays ect is easy in windowsprogramming, so i think it should be easy here also.

[Chris Ward]

Hi Sten

.... except that App Inventor does not have arrays as such, only "lists".

So, need to be comparing number of day of the week (1 to 7), where button 1 would represent either Sunday or Monday, depending on Country/Region/Locale, with number of the 1st day of the Month, then label accordingly from there.

This is going to require a large coffee.....

[Chris Ward]

... you could use an HTML Calendar in an App Inventor WebView Component (HTML files can be stored on the device).

There is also at least one extension (App Inventor plug-in) that delivers a Calendar:

https://community.thunkable.com/t/new-extension-modcalendarview-add-video-for-demonstration/14046

https://puravidaapps.com/extensions.php

[Chris Ward]

Hi again Sten

See the attached Project file, which essentially does as you require with App Inventor components:

1) Best not to hide buttons, because the others will then shuffle along and spoil your layout. Leave them blank instead.

2) In my example, I have not laid-out the buttons in a 7 x 6 format, that's your job :)

3) I have saved you the time of making the ListBlocks which I can do quickly here with the help of a util.

4) I have set February to default to 29 days (ListDaysPerMonth). You will need to check for a leap year.

regards

Chris

[Abraham Getzler]

The calendar math for this was fun, so

I put up with the 42 button tedium to make a sample.

See attached

ABG