Re: Watching a variable (array) for change

[Bruce Steers <bsteers4@xxxxxxxxx>]

I probably did something wrong but i just got segfaults when trying it (i
just imported the shmMem src folder into the program)

I think i need too many other tweaks to the TextEditor to fool myself into
thinking i could use Inheritance and a few tricks.

Even if the SharedMem stuff did work i think it's a lot to add for a small
purpose.

Thanks for the advice anyway :)

Respects
BruceS

On Thu, 29 Oct 2026 at 09:17, Brian G <brian@xxxxxxxxxxxxxxxx> wrote:

> One more thing, it uses fast, so the first time used it can take 30
> seconds or so to build with the jit.
> but once built it is cached and there is no delay after first time used.
> On 10/29/26 02:02, Brian G wrote:
>
> Try the shmmem library from the software farm. It allows you to create
> variables that will raise an event when changed. When created or destroyed.
> That includes arrays
> Hope this helps. once the library is installed, make the executable.
> There is a wiki with info: https://github.com/justlostintime/ShmMem/wiki
> in your code:
> __________________________________________--- cut here
> _____________________________________
> ' Gambas module file
>
> Use ":westwood/shmmem:2.2"
> Class Shmmem
>
> Public Sub Main()
>
>     Print "hello world"
>     Dim mymem As New Shmmem
>     Print "Memory defined"
>
>     With mymem
>         !a = 1
>         !b = "this"
>         .notify("b", Me)
>         !c = ["this", 2, 3, 4, "that"]
>         Print !a, !b, !c
>         .["c", 0] = "pull"
>         Print !c[0]
>         .b = "hellow there i changed"
>     End With
>     Print "Done"
>     mymem.close()
>     Quit 0
>
> Catch
>     Error "Script Error >";; error.text & "\n" & error.where
>
> End
>
> Public Sub b_changed(varname As String, value As Variant, TimedOut As
> Boolean)
>
>     Print "b set to :";; value
>
> Catch
>     Print "oops user 1";; error.text;; error.where
>
> End
> _____________________________________________________________ cut here
> ________________________________________________________________
>
>
> On October 28, 2026 11:42:50 PM PDT, BB <adamnt42@xxxxxxxxx>
> <adamnt42@xxxxxxxxx> wrote:
>
>> On 26/10/26 7:21 am, Bruce Steers wrote:
>>
>>
>> Is is possible to watch a variable for changes?
>>
>> I'm trying to do something with TextEditor that reacts when a procedure
>> Limit is Collapsed / Expanded
>> I've managed to get something working when mouse clicks do it but there's
>> other ways to collapse/expand limits too so looking for a simpler way.
>>
>> I can get a pointer to the TextEditor $aFold variable via the
>> TextEditor._GetFolding() method but is there a way to monitor an Array and
>> react to any changes?
>>
>> I've removed an adapted gb.form.editor source from my program and and
>> trying to replace all my mods via auto-inheritance of the main component
>> instead.
>>
>> I did have a TextEditor Fold event that triggered when a procedure was
>> folded/expanded. I'm trying to emulate that.
>> Having the Fold event added to master would be good but won't really help
>> me with backward compatibility so i'm looking for a workaround.
>>
>> Respects
>> BruceS
>>
>> This is not easy. I have been digging down into it and trying to find a
>> way to raise a signal where an address is written to at the OS level. It is
>> not an easy thing to do, in fact it may be impossible.
>>
>> But it has been a bit of a poser to be sure.
>>
>> hmmm
>>
>> b
>>
>>
>>
> --
> ~~~~ Brian
>
>