Re: [TCLCORE] TIP 742: Add Mouse Wheel Zoom Support to Tk Console

[EricT <tw...@gm...>]

Harald,

Thanks for sponsoring the TIP 742.

I've created a local implementation branch for TIP #742 (Add Mouse Wheel
Zoom Support to Tk Console), but I don't have write access to push it to
the core repository.

Attached is the patch file with the implementation. The changes are minimal
- just adding a Control+MouseWheel binding to library/console.tcl that
generates the existing <<Console_FontSizeIncr>> and
<<Console_FontSizeDecr>> virtual events.

Could someone with write access please create the implementation branch
tip-742-mousewheel-zoom and apply this patch?


Regards, the console freezing. Yes, it is a definite no-no to create very
long lines, as for example, [string repeat  xyz 25000] will pretty much
kill the console. However, this is not very common for debugging output. In
that case, when I would output quite a bit of text, from say a trace, the
console killer then would be when the text widget would try to do the "see"
operation on each line to position to the end of the text widget.

This I avoid by only doing a single "see" every 100 ms or so. Then in that
context, I have good performance. But it only addresses the one problem
where I'm doing thousands of relatively short lines (100 chars or less per
line).

I would consider this more of a hack, not a real solution to address
console performance.

Thanks
Eric


On Fri, Dec 5, 2025 at 2:04 AM Harald Oehlmann <har...@el...>
wrote:

> Eric has authored this TIP:
>
> https://core.tcl-lang.org/tips/doc/trunk/tip/742.md
>
> I think, this is a good idea.
> Is the unix console ready? Any action there?
>
> Eric, I sponsor your TIP.
> Can you make an implementation branch and a call for discussion, then vote?
>
> There was the discussion on the revised text widget on c.l.t. The
> console uses the text widget.
> You had a contribution there.
>
> What I see with the console:
> - lots of content with very long lines.
> - You resize the widget or scale the font
> - The widget freezes as the line break algorithm has to run. To my
> knowledge, this is very fast with the revised text widget.
>
> You had a proposal on c.l.t. Perhaps, this may also be added here.
>
> Thanks,
> Harald
>
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