Dynamically selecting buttons

[ABG]

If you want to avoid extensions and keep data out of your blocks, see these samples ...

Sliding a list of fixed components against an indefinitely long data list:

Move a scroll bar

Here's an example using your own Canvas as scroll bar. I used a Ball as a cursor, but you could as well have drawn a bar as a thumb instead. Gallery entry: ai2.appinventor.mit.edu/?galleryId=4965345777025024 [blocks] [buttons] [Capture] Color_code_scroller.aia (11.2 KB) [COLUMN] [Designer] [global color_table] [global colorlist] [global listOffset] [global table_text] [global textList] [loadButtonColors] [nudgeBall1] Uploading: when any Button Click.png... Uploading: when btnEnd Click.png... …

Navigate through a tree of html pages based on a table of headers and links:

Wheres_MIT