[issue29559] Detect mouse over lines on canvas while mouse button is down

[Xiang Zhang]

Changes by Xiang Zhang :


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nosy: +gpolo, serhiy.storchaka

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[issue29559] Detect mouse over lines on canvas while mouse button is down

[Ted Shaneyfelt]

New submission from Ted Shaneyfelt:

There way mouse captures are done, mouse-over events seem to be disabled while 
dragging. 

This makes it difficult to provides hints as feedback, and more complicated 
than it should be to detect when dropping over a particular line object. 

Tk may not directly support it, but is there any way of getting into its guts 
to provide an option to re-enable mouse-over events while dragging? Or even 
providing a tuple with the pending mouse-overs upon release? or perhaps even 
simulate a mouse-up-mouse-down sequence to allow the events to propagate 
through and consume the noise within tkinter? Or even detect that there is a 
pending mouseover waiting for the mouseup event and delivering it along with 
the mouseup or notifying within the event that there is one pending?

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components: Tkinter
messages: 287789
nosy: Ted Shaneyfelt2
priority: normal
severity: normal
status: open
title: Detect mouse over lines on canvas while mouse button is down
type: enhancement
versions: Python 3.6

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