[issue21933] Allow the user to change font sizes with the text pane of turtledemo

[Lita Cho]

Lita Cho added the comment:

Sounds good. I can wait till the sash code gets incorporated in order to
add in the font code.

I would have to generate a MOUSEWHEEL event and see if it fails. I have
generated mouse clicks before. I'll try to see if I can generate a
MOUSEWHEEL event and if it errors, not bind to it. Although it might be
hard for me to test, as I just updated my tcl/tk.

I will also try to figure out how to bind to Ctrl+MOUSEWHEEL and not just
MOUSEWHEEL.

Lita

On Mon, Jul 21, 2014 at 11:35 PM, Terry J. Reedy <report at bugs.python.org>
wrote:

>
> Terry J. Reedy added the comment:
>
> MOUSEWHEEL should continue to scroll.
> CONTROL+MOUSEWHEEL should change font size, as you said at the beginning.
> At least on Windows, this seems pretty standard: Internet Explorer,
> Firefox, Notepad++, LibreOffice (and, I imagin, OpenOffice, and Word),
> Thunderbird.  The only exception I can find that has a font size setting
> but ignores ^wheel is Command Prompt, which breaks multiple UI rules.
>  Notepad does not allow font resizing.
>
> Get ^wheel to work right and I would like to add it to Idle, where ^wheel
> scrolls along with wheel.
>
> ^+ and ^- are pretty standard also, though LibreOffice does not recognize
> them. Perhaps this is because it is explicit cross platform.
>
> We can conditionally not bind wheel events on Mac setups where it fails.
> Does #10731 have enough info to do that? In not... I have not yet looked
> into generating key/mouse events from code, but perhaps it would be
> possible to generate a wheel event inside try: except and unbind if there
> is an exception.
>
> ----------
>
> _______________________________________
> Python tracker <report at bugs.python.org>
> <http://bugs.python.org/issue21933>
> _______________________________________
>

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21933>
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