Commitcef4c0d

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use after idle after 0 incantation for TkTimer

1 parent035bf30 commitcef4c0dCopy full SHA for cef4c0d

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+10

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+10

-1

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Lines changed: 10 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -96,7 +96,16 @@ def _on_timer(self):`
`96`	`96`	`# if _timer is None, this means that _timer_stop has been called; so`
`97`	`97`	`# don't recreate the timer in that case.`
`98`	`98`	`ifnotself._singleandself._timer:`
`99`		`-self._timer=self.parent.after(self._interval,self._on_timer)`
	`99`	`+ifself._interval:`
	`100`	`+self._timer=self.parent.after(self._interval,self._on_timer)`
	`101`	`+else:`
	`102`	`+# Edge case: Tcl after 0 semantics prepend events to the queue`
	`103`	`+# so a 0 interval does not allow any other events to run.`
	`104`	`+# This incantation is cancellable and runs as fast as possible`
	`105`	`+# while also allowing events and drawing every frame. GH#18236`
	`106`	`+self._timer=self.parent.after_idle(`
	`107`	`+lambda:self.parent.after(self._interval,self._on_timer)`
	`108`	`+ )`
`100`	`109`	`else:`
`101`	`110`	`self._timer=None`
`102`	`111`

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