[issue39472] IDLE: improve handling of int entry in settings dialog

[Terry J. Reedy]

New submission from Terry J. Reedy <tjreedy at udel.edu>:

Spinoff from #31414, about int entry fields.  It claims: Note: a deeper problem is attaching a tracer that get called with each keystroke.  Using a StringVar avoids the error when the entry is blanked, but currently allows non-ints to be saved.  A better solution would be to not do the auto tracing, but use a IntVar and only call var_changed when the user 'leaves' the box, after checking for a count in a sane range.

Verify claim and proposed solution.

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assignee: terry.reedy
components: IDLE
messages: 360821
nosy: terry.reedy
priority: normal
severity: normal
stage: test needed
status: open
title: IDLE: improve handling of int entry in settings dialog
type: behavior
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39472>
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