Group resizing.

Alex Tweedly alex at
Sun May 3 10:20:50 EDT 2020

I realized after the discussion last week about resizing that I was 
missing the benefits of "resizeControl" being sent to each group, so I 
changed one of my resize handlers to make use of groups (adding a few 
groups along the way).

And it all went wrong :-(

Eventually I traced it down to the following ... and don't know if I'm 
missing something or if I've bumped into a bug.

The resize handler is

> on resizeControl
>    set the width of field "list titles" of me to the width of me - 20
>    put "B" && the rect of me && the bottom of me &CR after msg
>    set the left of field "list titles" of me to 10
>    put "C" && the rect of me && the bottom of me &CR after msg
>    local tR
>    put 10, the top of me, the right of me -10, the bottom of me-10 into tR
>    set the rect of fld "List" of me to tR
> end resizeControl

Note the two "put ... msg" statements. - for no reason I can figure out, 
the "bottom of me" changes between these two statements. Here's the 
output from the message box:

> B 5,32,331,468 468
> C 6,32,325,2618 2618
> B 5,32,331,471 471
> C 5,32,320,2622 2622
> B 5,32,331,473 473
> C 5,32,320,2626 2626
If I comment out that "set the left of ..." statement, all apparently 
works as expected.

Why should setting the 'left' of a control change the bottom of its 
enclosing group ?

And why change it to an apparently silly value ?

-- Alex.

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